Shanghai Daoqin Plastics Co., Ltd.

                                         
一, what is injection molding 麻点

injection molding 麻点就 is thick upper generate 凹坑.
二, molding 麻点生 formed causes

injection molding is due to resin has viscous in mold cavity upper generate, causes main/primary has below/following 三点:

1, holding pressure 不足

this is most is main/primary causes, resin mold rear, surface although already solid 化, is in separation has separation 进行凝 solid, false in this stage/phase holding pressure 不足, semi solid products surface 不会紧贴 in mold cavity upper, from easy 出现麻点 phenomenon.
                                        

2, resin temperature degree and mold temperature degree

resin or mold temperature degree comparison low 时, injection molding products surface solid speed degree add fast, has 时候进行 and add holding pressure, from 而出现麻点 appearance.

3, flow property and injection shot speed degree

resin flow property good and injection molding speed degree slow easy generate 麻点.

三, solutions

molding 时候麻点 solution main/primary method is improve/increase holding pressure. easy add holding pressure methods lower:

1, improve/increase resin and mold temperature degree.

2, improve/increase injection molding speed degree.

3, expand large gate.

4, adjustment thick degree.

5, selection flow property good material.