Features of Drebe vacuum forming (vacuum molding)

Alongside straight vacuum forming, this is a basic molding method where a sheet of thermoplastic resin, fixed in a clamp frame, is heated and softened, then pushed up and stretched with a convex shape. After that, the air between the mold and the sheet is expelled to complete the molding.
【Features】
1. Molding is easy.
2. The adjustment of molding conditions is relatively minimal and simple, making molding easy.
3. The inner surface of the molded product contacts the mold, resulting in high precision for inner dimensions.
4. Since scratches and debris from the mold can appear on the inside, careful mold management is necessary for molded products that emphasize the inner surface.
5. Compared to straight vacuum forming, somewhat uniform wall thickness of molded products can be achieved, but the side walls may become thinner.
6. Relatively deep drawing is also possible.
7. In the case of multiple parts, adjacent molds can affect each other, so it is necessary to use a separating grid in the upper clamp frame.
8. As the molded product tightens during cooling, it may become difficult to release.
9. Sufficient draft angles for release must be provided, or if there are vertical walls or slight undercuts, a mechanical knockout device will be necessary.
10. In the case of deep drawing, when pushed up and stretched, the side walls are stretched in one direction, creating directionality in the molded product and reducing lateral strength.

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