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Sand Casting Services

CM International’s sand casting capabilities serve almost any industrial or commercial application. Most commonly, we work with the automotive, hydraulic, railway, electronic, commercial, marine, and mining industries. Our part size capabilities range from 25mm to 750 mm (1” to 30”), and are made to fit your specifications. Tolerances are always to customer specifications based on the size of the part, with general tolerance per ISO 2768 /ASME Y14.5-2009. Headquartered in Chicago with manufacturing facilities located in China, we offer high-quality, cost-effective sand casting components to our US customers.

Process

The sand casting process begins by placing feeds and risers to either the top or bottom pattern. Sand boxes are then placed around the patterns and filled with casting sand, which is then compacted. The boxes are flipped upside down so that the patterns can be removed, and the feed sand boxes are placed on top of one another. Molten metal is poured into the feed hole, and once the metal is solidified and cooled, the top sand box is removed, revealing the newly sand casted metal part. Once the feeds are removed from the part, cleaning and grinding occur until the desired finish is reached.

Advantages of Sand Casting

First, it is relatively low in cost and has a low cost for tooling as well. Second, sand casting can be applied to both large and small parts, so it offers design flexibility. Because of this, it is often used to fabricate complicated parts, such as those with complex interior chambers. In addition, sand casting has the capability to work with many types of metal, both ferrous and non-ferrous.

Sand Casting Metals

  • Grey iron
  • Ductile Iron
  • Steel
  • Aluminum Alloy

What is the Difference Between Sand Casting and Die Casting?

  • Materials Used: Sand castings can be produced from a variety of metals, such as iron, steel, and aluminum alloy, while die castings mostly feature aluminum, zinc, copper, and stainless steel.
  • Surfaces: Sand casting parts have a relatively rough surface appearance compared to die casting, which has more surface variations. Die casting can produce parts with thinner walls and smoother surfaces than sand casted parts.
  • Tooling Patterns: In sand casting, the tooling in the sand pattern will be destroyed after use. While in die casting, the tooling pattern is permanent and can be used again and again to make the same part.

Sand Casting Photo Gallery

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Secondary Operations:

Conventional Milling and Turning; CNC Machining and Turning.

Tertiary Operations Plating:

Zinc Plating, Chrome Plating, Tin Plating, Nickel Plating, E-coating, Black Oxide, Anodize, etc.

Heat treatment:

Annealing, Normalizing, Tempering, Quenching, Induction Harding etc.