How Do Injection Molding Manufacturers Deal With The White Edge?

General do not understand the profession's first consideration is to change the material, why say so, because this is a lot of people do not know plastic injection molding process know the method, but this method has a defect, is spoiled, that in addition to change the material there is no other solution? Then the white edge and how it is constituted?

White edge is modified polyethylene and Plexiglas unique pinning defects, mostly in the parting surface near the edge of the part. The white edge is a collection of many stretch-oriented molecules that are straight with the direction of the material flow and the microscopic spacing between them. In the direction of the white edge still exists in the polymer connection phase, so the white edge is not a crack, under the appropriate heating, there may be stretching orientation molecules back to the natural bending state and make the white edge decline.

Injection molding manufacturer solutions.

Production process pay attention to adhere to the mold plate parting surface of a close match, especially the area around the cavity, must be in the real full clamping force, to prevent longitudinal and lateral expansion of the mold.　　

Decrease the injection pressure, moment and material quantity to cut down the orientation of molecules.　

The white edge of the mold surface is coated with oil release agent, on the one hand, so that this area is not easy to transfer heat and maintain more high-temperature moments, on the other hand, so that the white edge may be suppressed to reduce the white edge of the situation.