Features of Plug Assist Vacuum Forming (Vacuum Molding)

This is a molding method that combines straight vacuum forming and drape vacuum forming, where a heated and softened thermoplastic resin sheet is stretched with a plug, and then the air between the mold and the sheet is evacuated to closely adhere to the convex shape for molding.
【Features】
1. It allows for thickness adjustment and compensates for the disadvantage of corner areas becoming thin in straight vacuum forming by thickening the corner areas in drape vacuum forming, resulting in less uneven thickness and better molding.
2. The size of the plug, corner radius (corner R), sliding characteristics, temperature, speed, etc., can significantly affect the thickness of the molded product.
3. When molding multiple pieces, there is no influence from adjacent molded products.
4. By bringing the sheet of the flange part to the side wall, efficient molding is possible.
5. Due to the concave molding, the outer surface can be finished precisely.
6. Because of the concave molding, demolding is easy, and some undercuts can be achieved without the need for draft angles.

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