VACUUM MOLDING
There is no need resin or bentonite addition into the sand in this method. Because binder is vacuum itself applied to mold. Fine dry sand is used as mold material. It’s slower compared to bentonite sand systems, but because of better surface quality, it can be preffered.
Plastic layer is covered by vacuum on pattern surface. Vacuum applied sand is filled into special designed flask with vibration. Upper flask is replaced and casting is make while vacuum is still applied.
Features:
- High surface quality in the product.
- Dimensional accuracy is in the maximum level.
- No binder in the molding sand. High sand reclamation amount.
- Pattern and flask lifetime is quite high.
- Easy to eject pattern from the mold.
- High sand / metal performance.
- Suitable to thin sections of the casting.
- Environment-friendly method compared to other casting methods. No binder, coating or drying processes are used in this method of molding.
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