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General design rules for vacuum forming dies. (6)

Update:05-07-2019
Summary:

6.Shrinkage and deformation, plastic shrinkage (such as […]

6.Shrinkage and deformation, plastic shrinkage (such as PE), some plastic parts are easy to deform, no matter how to prevent, plastic parts will be deformed during the cooling phase. Under this condition, the shape of the forming mold is changed to accommodate the geometrical deviation of the plastic part. For example, although the wall of the plastic part is kept straight, the center of the reference has deviated by 10 mm; the base of the mold can be raised to adjust the amount of shrinkage of this deformation.

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