Sand Casting

Sand Castings of Grey Iron, Ductile Iron, Alloy Steel & Stainless Steel

Sand casting, which uses the sand (green clay sand, dry sand or resin coated sand) for form the casting mould for pouring molten metal, is one of the most popular and simplest types of casting. Sand casting allows for smaller batches than permanent mold casting at a very reasonable cost. Due to its well-suited for complex geometries, sand casting process takes advantage of compact sand, refractory and recyclability to produce relatively less expensive molds with quick tooling development and design changes at acompetitive cost.

There are several sand casting process based on different kinds of sand used for moulding. At RMC sand casting foundry, we proceed the sand casting process by green clay sand casting, resin pre-coated sand casting (shell mold casting) and furan resin sand casting (no bake mold casting). The pre-coated resin sand casting is also called shell molding casting or shell casting, which has much better surface for the finished castings than green sand castings.

Resin-Coated Sand Cores

Capacities and Molten Metal for Sand Castings

In our high tech facilities, we offer both automatic sand molding machine and manual molding operations in our resin sand casting processes. As an iron and steel foundry, RMC can pour iron castings using our no-bake casting process up to 1 ton finished weight in gray iron castings and ductile iron castings, and up to 0.5 tons in steel castings and stainless steel castings. RMC can produce casting parts in a wide variety of materials, including grey iron, ductile iron, stainless steel, carbon steel, alloy steel based on different standards from China and overseas. RMC is dedicated to the quality of our work, and our commitment to excellence ensures the highest customer satisfaction. As a global leader in high precision, high complexity, and mission critical casting and machined metal parts, we strive to meet and exceed the needs of our customers.

• Gray Cast Iron:  EN-GJL-100, EN-GJL-150, EN-GJL-200, EN-GJL-250, GJL-300, GJL-350
• Ductile Cast Iron: EN-GJS-400-18, EN-GJS-40-15, EN-GJS-450-10, EN-GJS-500-7, EN-GJS-600-3, EN-GJS-700-2, EN-GJS-800-2
• Cast Aluminium and Their Alloys
• Cast Alloy Steel, Cast Carbon Steel or other materials and standards on request
• Brass, Bronze and other Copper Base Alloys
• Stainless Steel, Nickel Base Alloys, Cobalt Base Alloys

• Max Size of Casting Molds: 1,500 mm × 1000 mm × 500 mm
• Weight Range of Sand Castings: 0.5 kg - 500 kg
• Annual Capacity of Sand Castings: 5,000 tons - 6,000 tons
• Casting Tolerances: On Request or According to ISO 8062

• Max Size of Casting Molds: 1,000 mm × 800 mm × 500 mm
• Weight Range of Sand Castings: 0.5 kg - 500 kg
• Annual Capacity of Sand Castings: 8,000 tons - 10,000 tons
• Casting Tolerances: On Request or According to ISO 8062

Sand Process Equipment

Sand Molding Machine

Sand Casting Inspection Capabilities

Our Spectrometer checks 15 chemical elements and metallurgical microscope produces high-resolution images 1,000 times magnified, and our cleanliness meter determines particle size and quantity to ensure materials meet or exceed the international standard. RMC use ultrasonic detectors to discover flaws, and have X-ray machines and accelerators that can scan castings with 200 mm maximum wall thickness.

RMC has a full range of inspection capabilities in house, which include:

• Spectrographic and manual quantitative analysis
• Metallographic analysis
• Brinell, Rockwell and Vickers hardness inspection
• Mechanical property analysis
• Low and normal temperature impact testing
• Cleanliness inspection
• UT, MT and RT inspection

Sand Molding Machine

Advantages of Sand Casting

✔ Lower Cost due to its cheap and recyclable mold materials and simple production equipment.

✔ Wide range of unit weight from 0.10 kg to 500 kgs or even bigger.

✔ Various Structure from simple type to complex type.

✔ Suitable for production requirements of various quantity

✔ Diverse metals could be cast by sand casting including ferrous metals and non-ferrous metals

✔ Long lifespan of the mold

Sand Casting Mold