Ultra Large Sand Casting
The sand casting process is capable of producing very large parts as well as form complex shapes. Able to deliver sand casting products of over a ton, this process has a typical dimensional tolerance of 0.3 millimeters and is able to deliver a 2.5 millimeter thin section.
The Pattern Oversize, Finish Allowances and Wall Thicknesses for Sand Castings
Note: You can click on the table below to view a larger image.
The Sand Casting Process Steps
The sand casting video shows the following process steps at ChinaSavvy's world-class foundry:
First, patterns are made for the top and bottom halves, after which feeds and runners are added to one of the patterns. Metal or wooden sand boxes are placed on the patterns, which are then filled with casting sand.
The sand poured is now compacted and the sand boxes are turned upside down. The patterns are removed and the feed halve of the box (the top) is placed on top of the bottom box.
Next, molten metal is poured into the feed hole and left to cool and solidify. Once solidification has taken place, the top box is removed and the part (with the feeds till attached) is removed.
Feeds are now cut off, leaving behind the final sand casting.
When compared to other casting processes, the sand casting process has a low tooling cost, an average cost per unit and is capable of delivering a fair to goods as-cast surface finish. With the best ease of design changes during the production process, it is capable of casting most metals, can fairly easily cast complex designs and delivers good relative mechanical properties.
You can also learn more about the various metals that can be casted using this process on our website.
Back to Main Page: Sand Casting
Further Suggested Reading:
- Hollow Core Sand Casting
- Metals that can be Sand Cast
- Resin Cores for Sand Casting
- Sand Casting Tolerances
- Surface Finish and sand types used to achieve fine finishes