China Investment Casting Foundry
Simis Investment Casting Foundry
Investment Casting Factory Introduction
SIMIS Precision Investment Casting (Lost wax casting) Factory specializes in the production of high-precision, complex-shaped metal castings, especially in the fields of industrial machinery, automobiles, energy and chemicals. SIMIS Precision Casting Factory covers an area of about 13,000 square meters, with an annual output of 900 to 1,500 tons. It is equipped with multiple production workshops and facilities, focusing on the refined operation of each casting process. The factory area has wax model making workshop, coating workshop, wax melting area, casting area, cooling and cleaning workshop and quality inspection laboratory. Each workshop is equipped with professional equipment to ensure the efficiency and accuracy of the casting production process.
SIMIS Investment Casting (Lost wax casting) Factory has advanced investment casting production equipment, such as: fully automatic wax injection machine, fully automatic coating system, wax melting equipment, medium frequency induction furnace, automatic cleaning equipment, etc. SIMIS Investment Casting Foundry has realized the automation of some processes such as wax model making, coating, dewaxing, casting, etc., which improves production efficiency and product consistency.
Investment Casting Process
Investment Casting Process Overview
Investment casting (also known as lost wax casting) is a high-precision casting process with very high casting accuracy and surface quality. It is particularly suitable for producing castings with complex shapes, precise dimensions, thin walls, high strength, and high surface quality requirements. Through multiple processes such as precise wax pattern making, coating, dewaxing, metal pouring, cleaning and trimming, investment casting can produce castings that meet the high requirements of industrial machinery, automobiles, energy and other industries.
1. Wax Pattern Making
2. Wax Assembly
Fix multiple wax patterns (single parts) to the wax runner system to form a tree-like structure, called a "wax tree".
3. Shell Making
Immerse the wax pattern in refractory ceramic slurry and evenly coat its surface with the slurry. Coat the surface of the wax pattern with a ceramic layer (usually 5 to 7 times) to form a refractory shell to withstand the high temperature and pressure during metal casting.
4. Dewaxing
Put the prepared ceramic shell into a high-temperature steam kettle or barbecue oven and heat it to 100~200℃ to melt the wax inside and form a cavity.
5. Shell Firing
Put the dewaxed ceramic shell into a high-temperature furnace (800~1000℃) for sintering to improve its mechanical strength and refractory properties and remove residual wax and moisture.
6. Metal Pouring
Heat the metal to melting temperature (such as stainless steel about 1600℃). Pour the molten metal into the preheated ceramic mold to fill the cavity and form a casting.
7. Knockout & Cleaning
After cooling, knock off the ceramic mold. Vibration, mechanical impact or chemical dissolution can be used to remove residual ceramic.
8. Heat Treatment
According to material requirements, anneal, quench, temper or solution treatment are performed on the casting to improve mechanical properties and corrosion resistance.
9. Machining
Precision machining such as turning, milling, drilling or tapping is performed according to requirements to achieve final dimensional accuracy.
10. Surface Treatment
Perform surface treatment such as electroplating, oxidation or painting as required to improve the appearance and corrosion resistance.
Materials For Investment Casting
What metal parts can be cast in Simis Investment Casting Factory？
SIMIS Investment Casting specializes in custom production of precision metal parts, suitable for parts requiring high dimensional accuracy and excellent surface finish. Common materials used for precision investment casting include alloy steel, carbon steel, stainless steel, aluminum alloy, and copper alloy. We can customize parts for various industries based on different materials, including automotive driveshaft brackets, steering knuckles, suspension system components, blades, nozzles, and various precision parts.
Carbon Steel Investment Casting
It is suitable for structural parts with complex shapes and high dimensional accuracy requirements, such as mechanical linkages, locking components, connectors, and brackets. Investment casting produces a smooth surface finish, reducing subsequent machining. Post-casting normalization and tempering treatments are also possible to achieve uniform mechanical properties.
Common metal grades include ASTM A216 WCB, A352 LCB, A148 80-50, AISI 1020, and 1045.
Alloy Steel Investment Casting
It is often used for high-load bearing or wear-resistant parts, such as gear blanks, track links, toolholders, and wear-resistant linings. Strength and wear resistance can be ensured through temperature-controlled pouring and subsequent tempering or induction hardening.
Common metal grades: AISI 4140, 4340, 8620, 52100.
Stainless steel investment casting
Commonly used in applications such as pump bodies, valves, food machinery accessories, and seawater pipe fittings, where corrosion resistance and surface quality are critical. Investment casting can produce thinner walls and smoother surfaces, and subsequent solution treatment and pickling passivation can enhance corrosion resistance.
Common metal grades: ASTM A351 CF8 (304), CF8M (316), CF3M (316L), ASTM A743 CA6NM.
Heat-resistant steel investment casting
Suitable for high-temperature flue gas, combustion chambers, furnace accessories, and other working conditions requiring long-term heat resistance and oxidation resistance. Investment casting can form complex fins, grilles, and supports, and subsequent stabilization heat treatment can enhance creep resistance.
Common metal grades: ASTM A297 HK, HT, HP.
Aluminum Alloy Investment Casting
Used for lightweight and complex-shaped parts such as robotic arms, fan impellers, automotive brackets, and electronic equipment housings. Investment casting produces a smooth surface, reducing machining allowances. Post-cast aging or T6 heat treatment can enhance strength.
Common metal grades: ASTM A356.0, 319.0, 535.0, EN AC-42100, AC-46200.
Copper Alloy Investment Casting
Commonly used for wear-resistant sliders, pump impellers, and electrical conductors, it is suitable for mass production of small precision copper parts. Porosity and shrinkage can be controlled, and post-cast stress relief annealing ensures dimensional stability and wear life.
Common metal grades: ASTM B584 C93200, C95400, C95500, DIN CC483K.
