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Analysis of Factors Affecting Dimensional Accuracy of Castings In Fine Casting Process Fine casting is a wide range of casting methods, including several varieties. What are the details? In addition, what factors will affect the dimensional accuracy of fine castings? These are the common sense of fine casting. For us, they are also the common sense points. We must grasp them when understanding fine casting, so here are the main points to introduce these two aspects. 1. Varieties of fine casting There are many kinds of fine casting, mainly including pressure casting, investment casting, lost foam casting, ceramic mold casting and metal mold casting. Investment casting is commonly used, which can also be called wax loss casting. 2. Factors affecting the dimensional accuracy of fine castings The main factors affecting the dimensional accuracy of fine castings are summarized as follows: Casting structure: the first is the wall thickness of the casting and the shortening rate of the data. Casting raw materials: the first is the carbon content in the material, which will affect the line shortening rate. Shell making data: it refers to the variety of shell making data and the corresponding expansion coefficient. Shell baking: it mainly depends on shell expansion coefficient and temperature. In addition to the above, there are aspects such as casting temperature, pressure holding time and investment mold scale. Each aspect can not be ignored and is very important, so we can't be careless.

Improvement Method of Sand Flushing for Shell Mold of Precision Casting Through the weekly quality improvement meeting on Wednesday, precision casting manufacturer Shengyu metal continues to pay attention to the quality situation. The company always adheres to the business philosophy of quality first. Recently, the quality data reflect the increase in the proportion of poor sand washing products in production. The production department led the audit department to assist in the follow-up inspection. The production department listed the possible sand washing points in the production process one by one through the 8D analysis method. The audit department went deep into the site to investigate one by one according to the control points listed by the production department. Finally, the main cause of poor sand washing was found in the shell mold link, and the shell mold was inspected by sampling, 30% of anomalies were found. The production department quickly formulated corresponding corrective and preventive measures: 1. Clean the hard blocks on the iron sheet of the gate cup; 2. Increase the cleaning times of filter screen in dewaxing link; 3. Upgrade the method of wiping gate cup in smelting process. Two weeks after the implementation of the measures, the quality of shell mold has been sampled again, which has been reduced from 30% to 3%. Quality is the cornerstone of the company's production and development and the lifeline of the company. Dongying Shengyu metal, a precision casting manufacturer, regularly holds quality improvement meetings to improve product quality. We are an outstanding supplier of precision casting, precision casting and all silica sol investment casting. We provide joint development and one-stop customized services from mold manufacturing to precision casting production, and are committed to providing high-quality precision casting for China's high-end manufacturing industry. If you have any questions about precision casting and precision casting, you are welcome to consult us.

Prevention of Porosity in Silica Sol Precision Casting and Pouring Temperature The development of silica sol precision casting in China has been relatively late. The product requires a relatively high precision process during the manufacturing process. Silica sol precision casting needs to further strengthen the product process in theory and practice. Correct understanding, and constantly supplement their basic professional knowledge. Silica sol precision casting has enriched its practical experience. During the operation process, the entire precision casting production process will be straightened out to cast more powerful quality products. During the filling operation, the foam model needs to be decomposed by liquefaction. It will cause a lot of small molecule gas and foam ash. These substances are harmful to people to a certain extent. In daily work, operators must strictly follow their operation manuals. Whether it is actual operation or auxiliary protection items, they must be carried out as required. During the operation process, you need to be proficient in the steps of the operation process. Compared with some complex thin-walled castings, silica sol precision casting can reasonably and effectively improve the air permeability of the modeling shell of its precision castings during the operation process. When possible, vent holes can be set at the highest point. The pouring system is reasonably set up in this way to prevent pouring gas. Silica sol precision casting should properly increase its pouring temperature during the operation process, reduce the distance between the ladle nozzle and the pouring cup as much as possible, and reduce the pouring speed reasonably and effectively, so that the molten metal can be filled smoothly. The mold shell of silica sol precision casting must be fully baked, and the temperature must be high enough during the operation process, so as to ensure that the precision casting shell is fully baked, so that the product's gas-producing substances are fully eliminated, and the completely baked mold shell is white Or light gray, there should be no dark spots. As a professional precision casting factory, with a professional technical team and reliable production capacity, Dongying Shengyu Metal Products Co., Ltd. warmly welcomes people from all walks of life to come to discuss cooperation.

What kinds of casting stress are there? How to distinguish the nature of casting cracks? Consider both casting structure and casting technology Casting stress can be divided into thermal stress and shrinkage stress according to the different reasons. (1) Thermal stress During the solidification and cooling process of the casting, the stress caused by the unbalanced shrinkage of different parts is called thermal stress. The thermal stress causes the slow cooling thick wall to be stretched, and the fast cooling thin wall or surface to be compressed. During directional solidification, due to the inconsistent cooling rate of each part of the casting, the resulting thermal stress is large, and the casting is prone to deformation and cracks. (2) Shrinkage stress When the casting shrinks in the solid state, the stress generated due to the obstruction of external forces such as the mold, core, and pouring riser is called shrinkage stress. , Generally, after the casting is cooled to an elastic state, shrinkage stress will be generated when the shrinkage is blocked. Shrinkage stress is often expressed as tensile stress. Once the cause of formation is eliminated (for example, after the casting falls out or the gate is removed), the shrinkage stress is also eliminated, so the shrinkage stress is a temporary stress. However, before the falling sand, if the shrinkage stress and thermal stress of the casting work together and the instantaneous stress is greater than the tensile strength of the casting, cracks will occur in the casting.

SHENGYU METAL CASTING NEW SERIES HANBDRAIL BRACKET COLORS GOLD Metal casting is a modern craft with ancient roots. In the metal casting process, metal shapes are formed by pouring molten metal into a mold cavity, cooling it in the mold cavity and then removing it from the mold. Metal casting can be said to be the earliest and most influential industrial process in history. It was once used to make many of the metal objects we use in our daily lives: car parts, train wheels, lamp posts, school bus pedals, and more. Additionally, metal foundries rely on metal recycling as a cost-effective source of raw materials, significantly reducing scrap metal that could end up in landfills.#glassspigot #poolfencing The history of metal casting#glassfencing #glassfitting#glasshardware #glassclip #glasspoolfencing The oldest known metal casting is that of the copper frog, which is believed to have been produced in Mesopotamia in 3200 BC, when copper was a ubiquitous material. Later, around 2000 BC, iron was discovered. But it wasn't until around 700 BC that China began producing cast iron. Interestingly, the sand moulding process for casting metal was also invented in China in 645 BC. glassspigot #poolfencing #glassfencing #glassfittings #glasshardware #glassclip #glasspoolfencing #framelessglass Crucible crafting is a technique for producing fine or tool steel that has appeared and disappeared around the world since the beginning of the 1st century AD. The technique first appeared in India and Central Asia until it appeared in northern Europe around 800 AD and was used to make Viking swords. The technology didn't resurface until 1750, when Benjamin Huntsman reinvented it in England. Huntsman heats small pieces of carbon steel in an enclosed crucible, a ceramic pan with refractory properties that can withstand high levels of heat. Huntsman reaches temperatures hot enough to melt steel for the first time. #usglassfencing #caglassfencing Casting metals into usable objects has evolved to become more precise and automated over the past millennia, but its core process has remained largely the same. Innovations in casting process automation, such as the Universal Kinematics Sand Casting Adjuster, have made it easier to machine large quantities of castings and improve casting quality. This machine is revolutionary in high volume moulding and sand handling for foundry applications. Dongying Shengyu Metal Product Co.Ltd is established in the year 2012 and located in Dongying China. With years experience of investment casting, metal casting,precision casting,steal casting , ShengYu grows up to the professional company in building hardware market and becomes to a collection of designing and production. In ShengYu, there are Glass spigot, Glass clamp, Glass standoff, marine hardware ,Pump Valve Parts ,Impeller Parts ,and other machinery parts etc. Here, all the products could be the standard hardwares and bespoke desing service. Our products are mainly exported to USA, Germany, England, New Zealand and Australian. The high quality and good service make Shengyu a great reputation. Warm welcom to visit Shengyu Company.

Heat Treatment of Precision Castings Due to different purposes of precision castings, there are many heat treatments, which can be basically divided into two categories. The first is that the microstructure will not change or should not change through heat treatment, and the second is that the basic microstructure will change. The first heat treatment procedure is mainly used to eliminate internal stress, which is caused by different cooling conditions and conditions during stainless steel casting. The structure, strength and other mechanical properties will not change significantly due to heat treatment. For the second type of heat treatment, Al Qaeda has changed significantly, which can be roughly divided into five categories: 1. Softening annealing: its purpose is mainly to decompose carbides, reduce their hardness and improve the machinability. For nodular cast iron, its purpose is to obtain more ferrite structure. 2. Normalizing treatment: the main purpose is to obtain pearlite and sorbite structure and improve the mechanical properties of stainless steel casting. 3. Quenching treatment: mainly to obtain higher hardness or wear strength and very high surface wear resistance. 4. Surface hardening treatment: mainly to obtain surface hardening layer and high surface wear resistance. 5. Precipitation hardening treatment: it is mainly to obtain high strength without drastic change in elongation.

What is Casting and the Development of Casting Casting Casting is a process in which metal is smelted into a liquid that meets certain requirements and poured into a mold. After cooling, solidification, and cleaning, a casting with a predetermined shape, size and performance is obtained. The casting blank is almost formed, and the purpose of free machining or a small amount of processing reduces the cost and reduces the time to a certain extent. Casting is one of the basic processes of the modern manufacturing industry. Foundry Development Casting is one of the basic processes of modern machinery manufacturing industry, so the development of the foundry industry marks the production strength of a country. my country has now become one of the world's largest foundry machinery countries, and has made great achievements in the foundry machinery manufacturing industry in recent years. During the "Eighth Five-Year Plan" period, the foundry machinery manufacturing was highly valued by the former Ministry of Electrical and Mechanical Services, which invested the largest special technical transformation loan and research expenses since the founding of the People's Republic of China, which supported the development and development of products in the foundry machinery industry. "Manufacture of large-scale shot blasting machine", "vertical parting boxless injection molding machine", "development of sodium silicate sand recycling equipment", "metal mold casting equipment" and so on have been developed and applied one after another. During the "Ninth Five-Year Plan" period, the foundry machinery industry has undertaken and established the task of "complete technology and equipment for refined and efficient modeling and cleaning of car casting blanks", and "development and development of high-efficiency continuous shot blasting cleaning line for cylinder block" has also achieved complete success , In 1999, it completed the success of the national high-level gas punching molding line project. During the "Tenth Five-Year Plan" period, the average annual growth rate of the main economic indicators of the foundry machinery industry was more than 30%, which was higher than the average growth level of the machine tool industry. Higher market sales levels. In addition, the complete set of resin sand casting equipment can basically meet the needs of the domestic market, changing the situation of mainly relying on imports in the past; it has been able to produce a high-level automatic casting production line, reaching a level that can partially replace imports, and partially solve the problem of car engines Cylinder block, cylinder head and other casting blanks are also imported; high-level automatic core making machine, automatic casting cleaning machine, automatic sand processor, large automatic die casting machine and precision casting equipment and other casting machinery can basically be produced in China. . It should be said that the product level of the foundry machinery industry has been greatly improved during the "Tenth Five-Year Plan" period, laying a good foundation for the further development of China's foundry machinery industry in the future. During the "Eleventh Five-Year Plan" period, stimulated by huge market demand, the foundry industry will continue to maintain a relatively high growth rate. As the technical level of foundry machinery products is still far from the market demand, there is huge development potential and room for expansion in the development of the industry, bringing opportunities for the rapid growth of the foundry machinery industry.

Material Properties of Iron and Steel Castings Steel Castings Steel castings are especially adapted for machine parts that must withstand shocks or heavy loads. They are stronger than wrought iron, cast iron, or malleable iron, and are very tough. The steel used for making steel castings may be produced either by the open-hearth, electric arc, side-blow converter, or electric induction methods. The raw materials used are steel scrap, pig iron, and iron ore, the materials and their proportions varying according to the process and the type of furnace used. The open-hearth method is used when large tonnages are continually required, while a small electric furnace might be used for steels of widely differing analyses, which are required in small lot production. The high-frequency induction furnace is used for small quantity production of expensive steels of special composition such as high-alloy steels. Steel castings are used for such parts as hydroelectric turbine wheels, forging presses, gears, railroad car frames, valve bodies, pump casings, mining machinery, marine equipment, engine casings, etc. Steel castings can generally be made from any of the many types of carbon and alloy steels produced in wrought form and respond similarly to heat treatment; they also do not exhibit directionality effects that are typical of wrought steel. Steel castings are classified into two general groups: carbon steel and alloy steel. Carbon Steel Castings Carbon steel castings may be designated as low-carbon, medium-carbon, and high-carbon. Low-carbon steel castings have a carbon content of less than 0.20 percent (most are produced in the 0.16 to 0.19 percent range). Other elements present are: manganese, 0.50 to 0.85 percent; silicon, 0.25 to 0.70 percent; phosphorus, 0.05 percent max.; and sulfur, 0.06 percent max. Their tensile strengths (annealed condition) range from 40,000 to 70,000 pounds per square inch (276-483 MPa). Medium-carbon steel castings have a carbon content of from 0.20 to 0.50 percent. Other elements present are: manganese, 0.50 to 1.00 percent; silicon, 0.20 to 0.80 percent; phosphorus, 0.05 percent max.; and sulfur, 0.06 percent max. Their tensile strengths range from 65,000 to 105,000 pounds per square inch (448-724 MPa) depending, in part, upon heat treatment. High-carbon steel castings have a carbon content of more than 0.50 percent and also contain: manganese, 0.50 to 1.00 percent; silicon, 0.20 to 0.70 percent; and phosphorus and sulfur, 0.05 percent max. each. Fully annealed high-carbon steel castings exhibit tensile strengths of from 95,000 to 125,000 pounds per square inch (655-125 MPa). See Table 1 for grades and properties of carbon steel castings. Table 1. Mechanical Properties of Steel Castings For general information only. Not for use as design or specification limit values. The values listed above have been compiled by the Steel Founders' Society of America as those normally expected in the production of steel castings. The castings are classified according to tensile strength values which are given in the first column. Specifications covering steel castings are prepared by the American Society for Testing and Materials, the Association of American Railroads, the Society of Automotive Engineers, the United States Government (Federal and Military Specifications), etc. These specifications appear in publications issued by these organizations. ksi = kips per square inch = 1000s of pounds per square inch; MPa = megapascals. a Quench and temper heat treatments may also be employed for these classes. Tensile Strength, ksi (MPa) Yield Point, ksi (MPa) Elongation in 2 Inch, Percent Brinell Hardness Number Type of Heat Treatment Application Indicating Properties Structural Grades of Carbon Steel Castings 60 (414) 30 (207) 32 120 Annealed Low electric resistivity. Desirable magnetic properties. Carburizing and case hardening grades. Weldability. 65 (448) 70 (483) 35 (241) 38 (262) 30 28 130 140 Normalized Normalized Good weldability. Medium strength with good machinability and high ductility. 80 (552) 85 (586) 45 (310) 50 (345) 26 24 160 175 Normalized and tempered High strength carbon steels with good machinability, toughness and good fatigue resistance. 100 (689) 70 (483) 20 200 Quenched and tempered Wear resistance. Hardness. Engineering Grades of Low Alloy Steel Castings 70 (483) 80 (552) 45 (310) 50 (345) 26 24 150 170 Normalized and tempered Good weldability. Medium strength with high toughness and good machinability. For high-temperature service. 90 (621) 100 (689) 60 (414) 68 (469) 22 20 190 209 Normalized and tempered a Certain steels of these classes have good high-temperature properties and deep hardening properties. Toughness. 110 (758) 120 (827) 85 (586) 95 (655) 20 16 235 245 Quenched and tempered Impact resistance. Good low-temperature properties for certain steels. Deep hardening. Good combination of strength and toughness. 150 (1034) 125 (862) 12 300 Quenched and tempered Deep hardening. High strength. Wear and fatigue resistance. 175 (1207) 200 (1379) 148 (1020) 170 (1172) 85 340 400 Quenched and tempered High strength and hardness. Wear resistance. High fatigue resistance. Alloy Steel Castings Alloy cast steels are those in which special alloying elements such as manganese, chromium, nickel, molybdenum, or vanadium have been added in sufficient quantities to obtain or increase certain desirable properties. Alloy cast steels are comprised of two groups-the low-alloy steels with their alloy content totaling less than 8 percent and the high-alloy steels with their alloy content totaling 8 percent or more. The addition of these various alloying elements in conjunction with suitable heat-treatments, makes it possible to secure steel castings having a wide range of properties. The three accompanying tables give information on these steels. The lower portion of Table 1 gives the engineering grades of low-alloy cast steels grouped according to tensile strengths and gives properties normally expected in the production of steel castings. Tables 2 and 3 give the standard designations and nominal chemical composition ranges of high-alloy castings which may be classified according to heat or corrosion resistance. The grades given in these tables are recognized in whole or in part by the Alloy Casting Institute (ACI), the American Society for Testing and Materials (ASTM), and the Society of Automotive Engineers (SAE). Table 2. Nominal Chemical Composition and Mechanical Properties of Heat-Resistant Steel Castings ASTM A297-81 ksi = kips per square inch = 1000s of pounds per square inch; MPa = megapascals. a Remainder is iron. Grade Nominal Chemical Composition, Percenta Tensile Strength, min 0.2 Percent Yield Strength, min Percent Elongation in 2 inch, or 50 mm, min. ksi MPa ksi MPa HF HH HI HK HE HT HU HW HX HC HD HL HN HP 19 Chromium, 9 Nickel 25 Chromium, 12 Nickel 28 Chromium, 15 Nickel 25 Chromium, 20 Nickel 29 Chromium, 9 Nickel 15 Chromium, 35 Nickel 19 Chromium, 39 Nickel 12 Chromium, 60 Nickel 17 Chromium, 66 Nickel 28 Chromium 28 Chromium, 5 Nickel 29 Chromium, 20 Nickel 20 Chromium, 25 Nickel 26 Chromium, 35 Nickel 70 75 70 65 85 65 65 60 60 55 75 65 63 62.5 485 515 485 450 585 450 450 415 415 380 515 450 435 430 35 35 35 35 40 - - - - - 35 35 - 34 240 240 240 240 275 - - - - - 240 240 - 235 25 10 10 10 9 4 4 - - - 8 10 8 4.5 The specifications committee of the Steel Founders Society issues a Steel Castings Handbook with supplements. Supplement 1 provides design rules and data based on the fluidity and solidification of steel, mechanical principles involved in production of molds and cores, cleaning of castings, machining, and functionality and weight aspects. Data and examples are included to show how these rules are applied. Supplement 2 summarizes the standard steel castings specification issued by the ASTM SAE, Assoc. of Am. Railroads (AAR), Am. Bur of Shipping (ABS), and Federal authorities, and provides guidance as to their applications. Information is included for carbon and alloy cast steels, high alloy cast steels, and centrifugally cast steel pipe. Details are also given of standard test methods for steel castings, including mechanical, non-destructive (visual, liquid penetrant, magnetic particle, radiographic, and ultrasonic), and testing of qualifications of welding procedures and personnel. Other supplements cover such subjects as tolerances, drafting practices, properties, repair and fabrication welding, of carbon, low alloy and high alloy castings, foundry terms, and hardenability and heat treatment. Austenitic Manganese Cast Steel: Austenitic manganese cast steel is an important high-alloy cast steel which provides a high degree of shock and wear resistance. Its composition normally falls within the following ranges: carbon, 1.00 to 1.40 percent; manganese, 10.00 to 14.00 percent; silicon, 0.30 to 1.00 percent; sulfur, 0.06 percent max.; phosphorus, 0.10 percent, max. In the as-cast condition, austenitic manganese steel is quite brittle. In order to strengthen and toughen the steel, it is heated to between 1830 and 1940°F (999 and 1060°C) and quenched in cold water. Physical properties of quenched austenitic manganese steel that has been cast to size are as follows: tensile strength, 80,000-100,000 psi (552–689 MPa); shear strength (single shear), 84,000 psi(579 MPa); elongation in 2 inches(50.8 mm), 15 to 35 percent; reduction in area, 15 to 35 percent; and Brinell hardness number, 180 to 220. When cold worked, the surface of such a casting increases to a Brinell hardness of from 450 to 550. In many cases the surfaces are cold worked to maximum hardness to assure immediate hardness in use. Heat-treated austenitic manganese steel is machined only with great difficulty since it hardens at and slightly ahead of the point of contact of the cutting tool. Table 3. Nominal Chemical Composition and Mechanical Properties of Corrosion-Resistant Steel Castings ASTM A743-81a a Remainder is iron. b For low ferrite or non-magnetic castings of this grade, the following values shall apply: tensile strength, min, 65 ksi (450 MPa); yield point, min, 28 ksi (195 MPa). Grade Nominal Chemical Composition, Percenta Tensile Strength, min 0.2% Yield Strength, min Percent Elongation in 2 inch, or 50 mm, min Percent Reduction of Area, min ksi MPa ksi MPa CF-8 CG-12 CF-20 CF-8M CF-8C CF-16, CF-16Fa CH-20, CH-10 CK-20 CE-30 CA-15, CA-15M CB-30 CC-50 CA-40 CF-3 CF-3M CG6MMN CG-8M CN-7M CN-7MS CW-12M CY-40 CZ-100 M-35-1 M-35-2 CA-6NM CD-4MCu CA-6N 9 Chromium, 9 Nickel 22 Chromium, 12 Nickel 19 Chromium, 9 Nickel 19 Chromium, 10 Nickel, with Molybdenum 19 Chromium, 10 Nickel with Niobium 19 Chromium, 9 Nickel, Free Machining 25 Chromium, 12 Nickel 25 Chromium, 20 Nickel 29 Chromium, 9 Nickel 12 Chromium 20 Chromium 28 Chromium 12 Chromium 19 Chromium, 9 Nickel 19 Chromium, 10 Nickel, with Molybdenum Chromium-Nickel-Manganese -Molybdenum 19 Chromium, 11 Nickel, with Molybdenum 20 Chromium, 29 Nickel, with Copper and Molybdenum 19 Chromium, 24 Nickel, with Copper and Molybdenum Nickel, Molybdenum, Chromium Nickel, Chromium, Iron Nickel Alloy Nickel-Copper Alloy Nickel-Copper Alloy 12 Chromium, 4 Nickel 25 Chromium, 5 Nickel, 2 Molybdenum, 3 Copper 11 Chromium, 7 Nickel 70b 70 70 70 70 70 70 65 80 90 65 55 100 70 70 75 75 62 70 72 70 50 65 65 110 100

Importance of China's Foundry Industry China's foundry industry has always been an important, basic, and irreplaceable industry in the national economy, with the advantages of relatively low cost and wide process adaptability. my country is a large casting country, and its annual output of castings, as well as the number of employees and enterprises, has ranked first in the world. With the strengthening of economic globalization and the continuous development of market economy, the demand for and dependence on various standards such as casting-related crafts, production, and management is increasing. In my country, there are still many problems to be solved for aluminum alloy castings to form large-scale production and meet the requirements of automobile lightweight. First, the requirements of automobiles for aluminum castings are developing towards thin-walled, complex-shaped, high-strength, and high-quality directions. In order to meet this requirement, the casting process should be further optimized and the development of new alloy materials should be carried out. Second, the production cost should be reduced from the perspective of design and process, such as the use of one-mold multi-part technology and automation technology to increase productivity, extend the service life of the mold, and use an integrated design to reduce the number of parts. Third, use computer simulation technology to shorten the development cycle of the process plan. Fourth, increase the recovery of aluminum. Recycled aluminum is the main raw material for aluminum casting. While developing the foundry industry, my country should pay attention to the utilization of recycled aluminum resources, develop technologies to effectively separate aluminum from composite and dissimilar materials, and establish a wide range of waste recycling systems. Our company has rich experience in the foundry industry. The aluminum castings we produce have low casting costs, good manufacturability, remelting and regeneration to save resources and energy. Aluminum castings prefer sand casting, mainly because sand casting is cheaper than other casting methods. , The production process is simple and the production cycle is short. After artificially heating it into liquid or molten aluminum alloy, pour liquid aluminum or molten aluminum alloy into the cavity through a professional mold or corresponding process, and take it out after cooling to form. Our commonly used aluminum casting methods are: sand casting, die casting, low pressure casting, precision casting, permanent mold, lost foam casting, etc. Because of its low density, high specific strength, and corrosion resistance, cast aluminum parts will be more widely used in aviation, aerospace, automotive, machinery and other industries. Well received by customers. Especially in the automobile industry, in order to reduce fuel consumption and improve energy utilization, it is a long-term development trend to replace steel and aluminum castings with aluminum and nickel alloy castings. Among them, it focuses on solving pollution-free, high-efficiency, easy-to-operate refining technology, metamorphism technology, grain refinement technology and rapid detection technology in front of the furnace. In order to further improve the material performance and maximize the potential of the material, high-quality aluminum alloy materials can be developed, especially aluminum castings that can meet the performance requirements of different working conditions; strengthen the research on the aluminum alloy melting process, and continue the aluminum alloy die casting and squeeze casting process And related technology development and research, perfect aluminum alloy smelting equipment and related technology and process development research.

Stainless Steel Precision Casting 1. What is the temperature control of stainless steel precision casting Stainless steel precision casting can effectively ensure that the melt has good fluidity during transfer to a certain extent. The temperature selection of stainless steel precision casting should be effectively determined according to the transfer distance and transfer process to reduce temperature and flow. Due to its small transition zone size, stainless steel precision casting has good mechanical properties during use, which can meet its fluidity to a certain extent and does not form bright crystals. The general temperature is 715~740℃. Stainless steel precision casting flat ingots have a high tendency of hot cracking, and the temperature of stainless steel precision casting is relatively low, generally 680~735℃. The crack tendency of stainless steel precision casting round ingot is relatively low, which can effectively ensure that the alloy has its good exhaust gas feeding ability to a certain extent, effectively create its sequence close conditions, increase the density, and the casting temperature is generally higher. , The casting temperature of ingots with diameters above 350mm is generally 730~750℃. 2. What is the dimensional accuracy of stainless steel precision casting? Stainless steel precision casting requires high dimensional accuracy, which can effectively reach CT4-6 in general. Due to the complex investment casting process in the product, there are many factors that affect the dimensional accuracy of the casting, such as the deformation of the investment and the shell Heating, shrinkage of mold material, etc. The alloy shrinkage rate of stainless steel precision casting and the deformation of its castings in the process of stainless steel precision casting. Although the dimensional accuracy of ordinary investment castings is relatively high, it needs to be improved in order to achieve consistency. The size and surface quality of stainless steel precision casting castings are higher than other casting methods, and more complicated than other casting methods. The products are resistant to high temperatures during use and are not easy to process. The products can be directly used. Cast by investment casting. The dimensional accuracy of stainless steel precision casting is generally very accurate, mainly depends on how we choose the appropriate accuracy. 3. What are the advantages and disadvantages of stainless steel precision casting? In the production of stainless steel precision casting products, some products have weird shapes and cannot be produced by bending pipes and other processes. Such irregularly shaped products are produced. Wax molds→sand molds→liquid materials are used for filling and molding. Craftsmanship. Stainless steel precision casting process. It is a low-cutting or no-cutting casting process. It is an excellent process technology in the foundry industry. It has a wide range of applications and is not only suitable for casting of various types and alloys. Advantages: According to different wax models, make products with various styles. Disadvantages: The precision of the formed blank is not high, and the surface roughness is also great.

The management requirements of valve spare parts and their differences with valve accessories Regarding valve spare parts, I believe everyone is familiar with it. However, whether you have a comprehensive understanding and understanding so far, from the current learning situation of everyone, I am afraid that the answer to this question is that there is no, that is, The expected goals and requirements have not been met. Therefore, let us first introduce what valve accessories are included? 1, actuators: pneumatic actuators, electric actuators, hydraulic actuators, gas-liquid actuators, electro-hydraulic actuators, manual actuators. 2. Positioners and accessories: pneumatic valve positioners, electrical valve positioners, intelligent valve positioners, electro-hydraulic servos, servo amplifiers, electrical converters, filter pressure reducing valves, valve position transmitters, retaining valves, solenoids Valves, limit switches, pneumatic amplifiers, intelligent modules, electro-hydraulic servos, servo amplifiers, alarms, explosion-proof coils, quick exhaust valves. 3. Testing equipment and other valve accessories: valve testing machine, handle, handwheel, worm gear, valve body, valve core, valve stem, valve cover, valve silencer, signal generator, blank, mold, bolt and nut, clamp, spring , Diaphragm, packing, packing, O-ring, flow juice, PTFE products, gaskets, flanges, elbows, quick connectors, expanders, flowmeter filters, non-standard solid parts, machine marking machine. Next, we will continue to learn in this area to reflect its importance. 1. For the solenoid valve, what are the main valve spare parts? And, valve spare parts, in which companies will they be used? The solenoid valve is a kind of valve, and its valve spare parts mainly include valve body, bonnet, static magnetic core, moving magnetic core, coil, and opening and closing parts. Moreover, on the opening and closing parts, there are pistons and The diaphragm and so on. As for the application of valve spare parts, they are mainly used in power plants, chemical plants, and water plants. In addition, they are also used in some large enterprises with a certain scale. 2. Is the management of valve spare parts scientific and effective? In the view of the valve spare parts manufacturer Wuxi Wuzhou Precision Casting, this must be done. Moreover, it is necessary to establish a corresponding management mechanism or management system, and conduct scientific management and standardized use. For the storage of valve spare parts, the above requirements must also be met, so that they can be adequately supplied during use and some problems can be avoided. 3. Is there a difference between valve fittings and valve spare parts? What is the general material of the seal in the valve spare parts? Valve fittings and valve spare parts, although there is only one word difference between the two, they are different, because valve fittings refer to a type of valve parts that cannot be used alone. Therefore, between them and valve spare parts, There is a difference. The material used for the seal in the valve spare parts is generally PTFE. The above-mentioned problems are related to valve spare parts, and at the same time, they are required to be understood and mastered in time, because they are of a certain degree of practicability. Moreover, in actual work, they may also be encountered. Therefore, only when they are firmly grasped can they be solved smoothly and satisfactorily when encountered, instead of creating new problems or bringing unnecessary troubles. Furthermore, the use effect of valve spare parts is reduced.

Coating Preparation Method for Precision Casting The physicochemical parameters of silica sol are mainly determined by the foundry: SiO2 content, density, Na2O content, pH value, kinematic viscosity, colloidal particle diameter, etc. These physicochemical parameters mainly affect the shell strength, coating stability and powder liquid ratio of the coating. Because it is difficult for precision casting enterprises to detect these physical and chemical parameters, on the one hand, it is necessary to strengthen the selection, evaluation and confirmation of suppliers. On the other hand, the foundry should choose different specifications of silica sol for surface layer and back layer, s-830 silica sol for surface layer and s-1430 silica sol for back layer. The preparation method of coating will directly affect the quality of castings in precision casting. Let's first understand the preparation of coating. In coating preparation, silica sol is added first, then wetting agent is added and mixed evenly, refractory powder is added during mixing, and finally defoamer is added. In order to ensure the coating quality, when the surface coating is all new, the mixing time shall be more than 24h before use. If some are new, the mixing time can be shortened to 12h. The mixing time of transition layer and back layer coating can be less than that of surface coating. When all are new, the mixing time shall be more than 10h, and when some are new, the mixing time can be shortened by half. If the coating prepared by the foundry is not used, it shall be covered and sealed to prevent moisture evaporation. It is better not to prepare coating in shell making operation, and the foundry should set up special coating preparation equipment.

Industry Characteristics of Precision Casting Among them, investment casting is more commonly used in investment casting, also known as lost wax casting: use suitable investment materials (such as paraffin) to make investment molds; repeat the process of dipping refractory paint and spreading refractory sand on the investment mold to harden the shell and Dry; then melt the internal investment to obtain a cavity; bake the shell to obtain sufficient strength, and burn off the residual investment material; pour the required metal material; solidify and cool, and remove the sand after shelling, Thereby a high-precision finished product is obtained. Heat or cold work and surface treatment as required by the product. For example, in sand casting, mass-produced factories should create conditions to adopt technologically advanced modeling and core-making methods. The old-fashioned shock-type or shock-pressure molding machine production line is not high enough in productivity, labor-intensive and noisy, and cannot meet the requirements of mass production, so it should be gradually transformed. For small castings, a boxless high-pressure molding machine production line with horizontal or vertical parting can be used, which has high production efficiency and small footprint for solid molding; for medium parts, various boxed high-pressure molding machine production lines, gas Punching molding line, in order to meet the requirements of fast and high-precision molding production line, core making methods can be selected: cold core box, hot core box, shell core and other efficient core making methods. For medium-volume large castings, the application of resin no-bake sand can be considered for molding and core making. For heavy castings produced in small batches, manual modeling is still an important method. Manual modeling can adapt to various complex requirements and is more flexible, and does not require a lot of process equipment. It can be applied to water glass sand mold, VRH water glass sand mold, organic ester water glass no-bake sand mold, clay dry mold, resin self-hardening sand mold and cement sand mold, etc. For heavy castings produced in a single piece, the pit molding method is low in cost and can be put into production. quick. For mass-produced or long-term shaped products, it is more appropriate to use multi-box molding and split-box molding methods. Although the initial investment in molds and sand boxes is high, it can be compensated by saving molding time and improving product quality. Casting methods such as low pressure casting, die casting and centrifugal casting are only suitable for mass production due to the expensive equipment and molds. Conditional method should be suitable For example, in the production of castings such as the bed of large machine tools, the core forming method is generally used, instead of making patterns and sand boxes, cores are formed in the pit; while other factories use the sand box modeling method to make patterns. Different enterprises have different production conditions (including equipment, site, staff quality, etc.), production habits, and accumulated experience. According to these conditions, we should consider what products are suitable and what products are not suitable (or cannot). Accuracy Requirements and Costs The accuracy of castings obtained by various casting methods is different, the initial investment and productivity are also inconsistent, and the economic benefits are also different. Therefore, in order to achieve more, faster, better and more economical, all aspects should be taken into account. A preliminary cost estimate should be made for the casting method selected to determine the casting method that is cost-effective and can meet the requirements of the casting. Although the development of my country's foundry industry is in a relatively difficult period, from a long-term perspective, there is still some hope for the development of my country's precision casting industry. The market demand has slowly started to pick up, and my country's foundry industry has It is believed that my country's foundry industry will definitely achieve gratifying results. Experts said that in order to fundamentally improve the level of casting technology, the following four points must be achieved: First, develop simulation technology, improve the accuracy of prediction, strengthen process control, and improve yield. The problem of regularity is not well grasped, which affects the yield in mass production. Second, the combination of production, education and research. In addition to the enhancement of innovation awareness and the improvement of research and development capabilities, the independent innovation of enterprises also needs to pay attention to and strengthen the combination of "production, learning and research" with precision casting enterprises as the main body. Third, attach importance to material research and development. Materials are the foundation of industry, and there is still a lot of work to be done. In the field of aerospace, the research and smelting technology of alloy materials, especially some new materials such as high-temperature alloys, still needs to be improved, and there is still a big gap with foreign countries. Fourth, pay attention to the improvement of equipment technology. The process is mainly a problem of equipment. Many key equipment, such as some directional solidification equipment, mainly rely on imports. Therefore, the research and development of precision casting equipment is still the focus.

Cast iron repair welding method and process Cast iron is a general term for alloys mainly composed of iron, carbon and silicon. In these alloys, the carbon content exceeds that which can be retained in austenitic solid solution at the eutectic temperature. So, let's take a look at the cast iron repair welding method and process. The welding method used for cast iron repair welding, the repair welding method is mainly based on the requirements after butt welding (such as the strength, color, compactness of the weld, whether to perform machining after welding, etc.), the structure of the casting (size, wall thickness, complexity, etc.) degree, stiffness, etc.) and defect conditions. Manual arc welding and gas welding are the most commonly used methods for repairing cast iron. Cast iron electrodes used for manual arc welding repair welding. When repair welding requirements are not high, ordinary low carbon steel electrodes such as J422 can also be used. The methods of manual arc welding repair welding are: (1) Preheat the weldment to a certain temperature (above 400°C) before thermal welding and semi-thermal welding, use a homogeneous electrode, choose high current for continuous repair welding, and slow cooling after welding. It is characterized by good welding quality, low productivity, high cost and poor labor conditions. (2) Non-cast iron electrodes are used for cold welding, which is not preheated before welding. Small current and dispersed welding are used during welding to reduce the stress of the weldment. The strength and color of the weld are different from the base metal, and the processing performance is poor, but the deformation after welding is small, the labor conditions are good, and the cost is low. (3) Cold welding of polymer materials can also be used. This repair only needs to clean the surface to be repaired, and it can be operated directly by hand. (4) How to use cold welding materials: First of all, the surface to be repaired should be treated well. There must be no rust and oil, otherwise the adhesive layer will fall off. It is best to roughen it, which can increase the bonding between molecules. It can greatly enhance the service life of the repaired product. Also remember to choose a special cold welding material that corresponds to the material of the casting itself. Dongying Shengyu Metal Products Co., Ltd. adheres to the business philosophy of survival by quality and development by integrity, specializing in the production of stainless steel, cast iron, cast aluminum, cast copper, ductile iron, precision casting, cast steel and other products. Customers only need to provide drawings or samples to design and produce according to customer requirements.

Factors Affecting the Dimensional Accuracy of Precision Castings Under normal circumstances, the dimensional accuracy of precision castings is affected by many factors such as casting structure, casting material, mold making, shell making, baking, pouring, etc. Any setting or unreasonable operation of any link will change the shrinkage rate of the casting. This leads to deviations in the dimensional accuracy of the castings from the requirements. The following are the factors that can cause defects in the dimensional accuracy of precision castings: (1) The influence of casting structure: a. Casting wall thickness, large shrinkage rate, thin casting wall, small shrinkage rate. b. The free shrinkage rate is large, and the hindered shrinkage rate is small. (2) The influence of casting material: a. The higher the carbon content in the material, the smaller the linear shrinkage rate, and the lower the carbon content, the greater the linear shrinkage rate. b. The casting shrinkage rate of common materials is as follows: casting shrinkage rate K=(LM-LJ)/LJ×100%, LM is the cavity size, and LJ is the casting size. K is affected by the following factors: wax mold K1, casting structure K2, alloy type K3, pouring temperature K4. (3) The influence of mould making on the linear shrinkage rate of castings: a. The influence of wax injection temperature, wax injection pressure, and pressure holding time on the investment size is the most obvious in the wax injection temperature, followed by the wax injection pressure, and the pressure holding time is guaranteed After the investment is formed, it has little effect on the final size of the investment. b. The linear shrinkage rate of wax (mold) material is about 0.9-1.1%. c. When the investment mold is stored, there will be further shrinkage, and its shrinkage value is about 10% of the total shrinkage, but when stored for 12 hours, the investment mold size is basically stable. d. The radial shrinkage rate of the wax mold is only 30-40% of the lengthwise shrinkage rate. The wax injection temperature has a far greater influence on the free shrinkage rate than the hindered shrinkage rate (the best wax injection temperature is 57-59℃, The higher the temperature, the greater the shrinkage). (4) The influence of shell-making materials: zircon sand, zircon powder, Shangdian sand and Shangdian powder are used. Because of their small expansion coefficient, only 4.6×10-6/℃, they can be ignored. (5) The effect of shell baking: Because the expansion coefficient of the shell is small, when the temperature of the shell is 1150℃, it is only 0.053%, so it can be ignored. (6) The influence of casting temperature: the higher the casting temperature, the greater the shrinkage rate, and the lower the casting temperature, the smaller the shrinkage rate, so the casting temperature should be appropriate.

The Production Process andTtechnological Requirements of Stainless Steel Precision Casting Dongying Shengyu Precision Casting Factory will effectively manufacture molds according to different shapes. The mold of the product can be effectively divided into upper mold and lower mold, and integrated processes such as milling, etching, and EDM are used. The shape and size of the pits are consistent with the half of the product. The first layer of fine sand produced by Dongying Shengyu Precision Casting Factory is naturally air-dried at the set temperature, but it will not affect the shape change of the inner wax mold. The natural wind drying time depends on the internal complexity of the product itself. The air drying time for the first pouring is about 5-8 hours. Dongying Shengyu Precision Casting will effectively fix its baking process on the die head, and then effectively complete the wax mold of its sandblasting drying process into its metal-enclosed special furnace for heating, because of the melting point of industrial wax Not high, the temperature is about 150. There are two major types of dewaxing casting methods: the solid mold method and the ceramic shell mold method. The latter is an improved method of the former. The production of the pottery shell mold method to the wax mold is the same as the solid mold method, except that after dipping and sanding (or floating sand) once, the overmolding operation is not carried out, but the dipping and sanding are repeated many times. , Until the predetermined shell thickness is obtained. The wax is dried, heated, melted, and heated at high temperature before pouring. This method is widely used by the current dewaxing precision casting industry because it has the following advantages: (1) The manufacturing process can be partially automated to save manpower and increase production rate (2) Lower production cost (3) The ceramic shell mold is thinner, and the cooling rate of the casting after pouring is higher and uniform, so its mechanical properties are better. (4) Better dimensional stability In addition, what are the mechanical and technological requirements for stainless steel precision casting? During use, the temperature of stainless steel precision casting can ensure that the melt has good fluidity during the injection process. In the process of selecting temperature, stainless steel precision casting needs to be effective according to factors such as the distance of its transfer, cooling and flow rate during the transfer process. When stainless steel precision casting is used, the cracking tendency of the ingot is lower. In use, it is necessary to ensure that the alloy has good exhaust and shrinkage capabilities. In the course of use, an orderly crystallization condition is created, which effectively increases the density of the product. The pouring temperature is generally higher. Stainless steel precision cast ingots are small-diameter steel ingots. Due to the small transition zone size, their mechanical properties are good. They generally meet fluidity and do not form bright crystals. The temperature is 715~740℃, and the slab has a high tendency of hot cracking. In the process of using stainless steel precision casting, its mechanical properties are generally higher than that of cast iron, but the performance of this material is even worse. During the production process, the melting point of the product is higher than the melting point of other materials. There are many problems in the stainless steel precision casting process, mainly due to the poor liquidity of molten steel. In the process of processing, in order to effectively prevent the cast steel from being cold, the wall thickness of the cast steel should not be less than 8mm. The structural force of the stainless steel precision casting system is very simple. During use, if cast iron, the cross-sectional size of the equipment is larger. In the process of processing, hot casting or dry casting can be used.

During the cleaning process of stainless steel castings, the surface of the product is not allowed to have oxide scale and sticky sand to affect the processing of its parts. The inner cavity of Dongying Shengyu precision casting products is not in the process of processing. Any residual sand core block, burr, flash and other defects. The geometry of stainless steel castings is complete in the process of processing, and the sand removal damage on the surface that does not need to be processed should not be greater than the size deviation there. No matter what material of the casting, the residual riser roots need to be left. Except in time. The processing surface of stainless steel castings is not allowed to have the residual amount of the pouring riser. When the product is repaired, the processing surface can be made of grinding wheels or other tools. In the process of repairing, the welding mouth needs to be repaired and flattened according to the parent body, and then Clean up the splashed casting welding slag. After the stainless steel casting is shot blasted, the product is effectively processed without magnification. The code of the workpiece in the product should not be able to see its dirt and oxide scale. The surface of the product should be uniform and the color should be metallic. . During the production of stainless steel castings, some hardware facilities and management problems will appear to be deformed. The product needs to find its mold presets before wax injection until the mold temperature is the same as the room temperature of the wax injection chamber. Start waxing. After the finished product of stainless steel castings comes out, the self-inspection is first required. During the self-inspection, it is mainly to see whether the product is deformed or defective during processing. It is recommended to use jig inspection as much as possible after the finished product is shipped. , This can effectively detect its accuracy and speed. Hard materials can be used when processing stainless steel castings. During use, the surface of the product must be wear-resistant. For some parts with a relatively large area, the tonnage of the press must be calculated reasonably. Dongying Shengyu Precision Casting foundry is like this It can effectively avoid its waste and lack of power.

The process of cleaning precision castings from the mold, removing excess parts other than the main body, and polishing the inner and outer surfaces of the castings. De-coring and surface cleaning: Divided into two categories, dry and wet. Dry cleaning is the use of mechanical equipment to clean the castings. The equipment is simple, the production efficiency is high, and it has the advantages of greater adaptability to different types of castings and can remove the core and effectively clean the surface. The disadvantage is that the equipment is running. In general, the dust is flying, the noise is large, and the environment is polluted. Wet cleaning has no dust, but because water is used as the medium, the surface of the casting is easy to rust. A large amount of sewage and cement sand are generated in the work process, which causes problems such as the regeneration of sand and water and sludge treatment. The dry and wet cleaning methods commonly used in production are: 1. Roller cleaning. Put the casting and the star iron into the round drum together. When the drum rotates, the sand inside and outside the casting will be removed due to the collision and friction between the casting, the star iron and the waste sand. Polishing the surface of the castings can also partially clean the flash and burrs. This type of equipment can be used to clean small and medium-sized castings with simpler appearance and thicker walls. 2. Shot blasting. The impact force of high-speed steel shot, iron shot, and abrasive flow is used to clean the core, sticky sand, and polish the surface of the casting. In addition, the common shot blasting equipment also has a shot blasting cleaning table and a shot blasting cleaning room for development. Continuously produced shot blasting machines include chain-type shot blasting drums, continuous shot blasting cleaning tables, suspended continuous production shot blasting cleaning rooms, etc. These types of equipment have high operating and maintenance costs. 3. Hydraulic sand removal. Shoot high-pressure water from the nozzle of the gun to the cast part to be disposed of according to the pipeline, and use the kinetic energy and scouring effect of the water flow to clean the core and the casting sand. The hydraulic sand cleaning is generally equipped with an open cleaning chamber composed of section steel and steel plate, with a rotation at the bottom. The working table and the spray gun are installed on the side wall, which can move up and down and rotate, so that the high-pressure water can be sprayed to any part except the bottom surface of the casting. Sometimes, in order to better improve the efficiency of cleaning the sand on the surface of the precision casting, the spray gun Quartz sand and other abrasives are introduced into the appropriate position to obtain high-speed water sand flow. This method is generally called water sand cleaning. 4. Water explosion to clear sand. After the mold is poured, the precision casting is boxed when it cools to the specified temperature, and it is immediately immersed in the pool. The water penetrates into the mold through all the gaps and contacts the high-temperature metal quickly, vaporizes and explodes. The shock wave can basically clean the sand attached to the inside and outside of the casting. The water explosion sand cleaning method has the advantages of short working time and high efficiency. It is widely used in domestic steel casting workshops. It is generally used to dispose of steel castings with a carbon content of less than 0.35%.

How to Make Independent Innovation In Foundry Enterprises The outline of China's eleventh five year development plan points out that it is necessary to "improve the industrial technology level with independent innovation, strive to master core and key technologies, enhance the transformation ability of scientific and technological achievements, and improve the overall technical level of the industry". At present, the technological independent innovation of foundry industry mainly includes the following main areas: 1. Casting technology of large and key equipment parts: mainly including casting technology of large and extra large steel castings and ductile iron parts (such as turbine blade, upper ring, lower ring, rolling mill frame, nuclear waste tank, etc.); Casting technology of directionally solidified blades and single crystal blades of steam turbine and turbine engine; Production technology of aerospace aluminum alloy, magnesium alloy and titanium alloy large structural castings. 2. Light metal advanced casting and forming technology: mainly including die casting technology of complex automobile aluminum alloy castings (such as automobile engine cylinder block); Aluminum alloy semi-solid casting technology; Squeeze casting technology of aluminum alloy and aluminum matrix composites; Production technology of large thin wall aluminum alloy castings; Complete set of aluminum alloy precision sand casting technology; High performance magnesium alloy die casting technology (such as vacuum die casting, ultra-low speed die casting, etc.); Development of cast heat-resistant magnesium alloy materials; Anticorrosion technology of magnesium alloy castings. 3. High quality, efficient, energy-saving and environment-friendly casting technology: mainly including the development of energy-saving and environment-friendly casting equipment and auxiliary materials, such as smoke and dust removal of cupola; Develop low pollution, non pollution and normal temperature hardening sand mold and sand core binder; Recycling and comprehensive utilization technology of foundry waste; EPC technology and the development of complete sets of precision and efficient forming equipment, such as high-precision foam forming machine, bonding machine, intelligent vibration compaction device, and the integrated technology of "waste heat heat treatment, sand falling and sand regeneration" of aluminum alloy castings. 4. Digital casting technology: mainly including knowledge-based digital design theory and method of casting forming process (KBE); Mathematical modeling, simulation and Simulation of multi field coupling in macro / micro continuous scale in casting process; The calculation method and parallel computing technology in the simulation of casting forming process. Digital casting technology also includes enterprise management informatization and external contact through network. 5. Research and develop key equipment for casting production: such as large and super large precision and high-efficiency aluminum alloy die casting equipment; High speed, high efficiency and high density sand mold manufacturing equipment; Cupola smoke elimination and dust removal equipment; Efficient and energy-saving old sand regeneration treatment equipment, etc.

Investment Casting Services Dongying Shengyu Metal Product Co.Ltd is one-stop-shop to for metal casting prototype services for a wide spectrum of materials like bronze, zinc, aluminum, magnesium that are created by different moulding process. Since a very long time, our investment casting solution has been benefitting clients from different parts of the country. Our professionals have succeeded maintaining quality and fineness for investment casting services, which helps us bringing genuine customers looking for best investment casting services. Here is how a metal casting prototype is designed- · Foundation of master model · Creation of master molds · Use of master mold to create plaster mold · Drying of mold · Use of plaster mold to pour the metal · Cleaning for shipping and machining We are one of the best and a full-services investment casting companies in China. We provide superfluous manufacturing capabilities with top-quality precision casted parts to execute the purposes of customers from a different industry. Our services are readily available to represent the best evidence of exclusiveness and expertise at its investment casting foundries, manufacturing precision parts from all needed metals you want. We have maintained an enduring relationship with our customers by providing value-added services that make a real investment of their capital. We offer investment casting solution, which makes difference. Our exclusive services improve lead times and enhance quality to lessen our customer`s trouble of hiring the best investment casting service provider in their location. We are glad to tell you that we have successfully accomplished our customers` expectorations by offering them top-quality products and on-time deliverance of work. Whether you require industrial mixing propeller or detailed cast statue, our expertise services allow you completing the task more efficiently. Through various crucial aspects such as quality verification, finishing and polishing, machining capabilities and non-destructive testing, our investment casters become able facilitating you the top choice in the market. Choose us for the best: If you are looking to hire excellent investment casting services to accomplish manufacturing demands of your industry, go with. Our highly proficient and experienced professionals will let go to the depth of exertion and select the best on a premise of your order. We ensure you providing world-class and highly advanced investment casting solution with reduced some time and cost. Therefore, do not forget to contact us before moving further.