Plastic mold manufacturer How to deal with white edges

Plastic mold factory How does the family deal with the white edge? Generally, people who do not know this profession should first consider changing materials. Why do you say that? Because this is a method that many people who do not know plastic injection molding know, but this method has a defect, that is, waste. Is there no other solution except changing materials? How is the white border formed?

White edge is a unique injection defect of modified polyethylene and plexiglass, which mostly appears on the edge of the part near the parting surface. The white edge is an aggregate of many tensile orientation molecules that are straight to the material flow direction and the fine spacing between them. There is still polymer connecting phase in the direction of white edge, so the white edge is not a crack yet. Under proper heating, it may make the stretching oriented molecules return to the natural bending state and make the white edge fade.

Plastic mold Manufacturer's solution:

During the production process, attention shall be paid to the close fitting of the parting surface of the template, especially the area around the cavity, which must be under the truly sufficient clamping force to prevent the longitudinal and transverse die expansion. 　　

Reduce injection pressure, time and material quantity, and reduce molecular orientation. 　

Apply oily release agent on the white side of the mold surface. On the one hand, it makes heat transfer difficult in this direction and maintains more at high temperature. On the other hand, it may cause the white side to be suppressed and white side to appear.