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What is sand casting?
It is a process that utilizes non-reusable sand molds to form metal parts – usually aluminum, brass, and zinc. A pattern that is usually CNC machined or 3D printed according to your 3D model, is placed into a sandbox. Then the cavity is formed with sand around the pattern. With other features on the mold, for example pouring cup, sprue, and runner, operators can fill molten metal into the cavity of the sand mold to produce the part.
What are the advantages of sand casting?
1. Low Mold Cost
The sand mold is much lower than the die casting mold. It makes sand casting a good choice for lower volume production. The cost saving can be significant when the part is big and has complex features.
2. Wide Material Suitability
Sand casting is good to make almost any material – aluminum, steel, brass, bronze, and zinc. Sand mold has very high fire resistance than steel mold making it suitable for high melting temperature materials like steel and copper.
3. Good Geometry Adaptability
Sand casting suits any part small or large, simple or complex. The advantage is very obvious for large and complex parts. It is good for making thin wall features or under-cuts.
4. Short Lead Time
It requires a much shorter time to build a sand mold – as short as one week depending on the complexity of the part.
A chart to compare all these processes above
Processes | Dimensional Accuracy | Surface Quality | Production Efficiency | Geometry Adaptability | Mold Cost | Part Cost |
Sand Casting | Good | Good | Good | Best | Best | Good |
Permanent Mold Casting | Better | Better | Better | Good | Better | Better |
Investment Casting | Better | Better | Good | Better | Better | Good |
Die Casting | Best | Best | Best | Good | Good | Best |
What is sand casting?
It is a process that utilizes non-reusable sand molds to form metal parts – usually aluminum, brass, and zinc. A pattern that is usually CNC machined or 3D printed according to your 3D model, is placed into a sandbox. Then the cavity is formed with sand around the pattern. With other features on the mold, for example pouring cup, sprue, and runner, operators can fill molten metal into the cavity of the sand mold to produce the part.
What are the advantages of sand casting?
1. Low Mold Cost
The sand mold is much lower than the die casting mold. It makes sand casting a good choice for lower volume production. The cost saving can be significant when the part is big and has complex features.
2. Wide Material Suitability
Sand casting is good to make almost any material – aluminum, steel, brass, bronze, and zinc. Sand mold has very high fire resistance than steel mold making it suitable for high melting temperature materials like steel and copper.
3. Good Geometry Adaptability
Sand casting suits any part small or large, simple or complex. The advantage is very obvious for large and complex parts. It is good for making thin wall features or under-cuts.
4. Short Lead Time
It requires a much shorter time to build a sand mold – as short as one week depending on the complexity of the part.
A chart to compare all these processes above
Processes | Dimensional Accuracy | Surface Quality | Production Efficiency | Geometry Adaptability | Mold Cost | Part Cost |
Sand Casting | Good | Good | Good | Best | Best | Good |
Permanent Mold Casting | Better | Better | Better | Good | Better | Better |
Investment Casting | Better | Better | Good | Better | Better | Good |
Die Casting | Best | Best | Best | Good | Good | Best |
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