Cast-iron sand casting

for the construction industryindustrialfor the petrochemical industry

Product Overview
Grey Cast Iron Sand Casting is a traditional casting method where molten grey cast iron is poured into a sand mold and allowed to cool and solidify. This process enables the production of castings with complex shapes and dimensions, making it suitable for a wide range of industrial applications.

Applications

• Automobile industry
• Mechanical manufacturing
• Construction engineering
• Petrochemical industry

Features

• Complex shapes: Excellent fluidity and coagulability of grey cast iron make sand casting ideal for manufacturing blanks with complex shapes, especially those with intricate internal cavities.
• Low cost: Grey cast iron is relatively inexpensive, making it suitable for small and medium batch production and cost-sensitive applications.
• High strength and hardness: The material offers high strength, hardness, and good wear resistance, suitable for demanding mechanical and automotive parts.
• Wide adaptability: Compatible with various alloys and unrestricted casting dimensions.
• Excellent corrosion resistance: Suitable for aggressive and high-temperature environments.
• Good lubricity: The graphite content provides excellent lubrication, reducing wear in sliding friction applications.

Comparison with Other Casting Processes
Comparison dimension | Sand casting | Die casting | Investment casting
Cost | Low (less investment in raw materials/equipment) | High (High cost of metal molds) | High (Complex wax mold/shell process)
Applicable in bulk | From single pieces to large quantities | Large quantity | Medium and small batch precision parts
Casting complexity | High (capable of forming complex inner cavities) | Medium (suitable for simple to moderately complex parts) | High (near net shape)
Material compatibility | Gray cast iron, ductile iron, cast steel, etc. | Non-ferroalloys (such as aluminum, zinc, etc.) | All kinds of alloys (including high-temperature alloys)

Process Steps

• Mold manufacturing: Wooden or clay molds are created based on customer drawings, followed by high-precision metal molds shaped through compression and vibration.
• Sand mold preparation: Involves sand selection, cleaning, sorting, drying, mixing, mold making, and baking, with careful control of moisture and viscosity.
• Casting: After mold preparation, the mold is inspected and preheated. Molten iron is poured, cooled, and solidified using equipment like water coolers and baking ovens.
• Sand core fabrication: For castings with internal cavities or complex structures, sand cores are fabricated with higher precision.
• Cleaning and treatment: Removal of sand mold and core (peel off), followed by deburring, grinding, pickling, heat treatment, and surface coating.

FAQ

• Why choose gray cast iron sand casting? It offers low cost, high adaptability, mature technology, and is ideal for complex shapes and multi-batch production.
• What are the core advantages? Material cost, process flexibility, and adaptability of casting performance. Grey cast iron's good fluidity and shrinkage compensation reduce defects.
• Is sand casting important for grey cast iron? Sand casting accounts for over 80% of grey cast iron applications, especially in automotive and machinery industries.

Technical Specifications / Characteristics

• Material: Grey cast iron
• Process: Sand casting
• Applications: Automotive, mechanical manufacturing, construction, petrochemical
• Features: Complex shapes, low cost, high strength and hardness, wide adaptability, corrosion resistance, good lubricity
• Production: Suitable for small, medium, and large batches