The following methods can be used to exclude improper mold structure design of blister packaging product:
① Reasonably design the draft angle.
Generally, it is not necessary to design the demolding slope when the female mold is formed, but designing some slopes is conducive to the uniform wall thickness of the product. When forming a male mold, for styrene and rigid polyvinyl chloride sheets, the demolding angle is preferably about 1:20; for polyacrylate and polyolefin sheets, the demolding angle is preferably greater than 1 : 20.
② Increase the fillet radius appropriately.
When the edges and corners of the product need to be rigid, the bevel can be used instead of the arc, and then the bevel can be connected with a small arc.
③Appropriately reduce the drawing depth.
Generally, the drawing depth of the product should be considered in conjunction with its width. When the vacuum method is directly used for molding, the drawing depth is preferably less than or equal to half of the width. When deep drawing is required, a pressure-assisted plunger or pneumatic sliding molding method should be used. Even with these forming methods, the drawing depth should still be limited to a range less than or equal to the width.
