thin-walled housing_pannel_bottle_cup double injection mold

thin-walled housing_pannel_bottle_cup double injection mold-coverage all kinds of precision thin-walled double injection mold manafucturing
Thin-walled transparent housing double injection mold-because of function requirement,doulbe shot a thransparent thin-walled layer or thin-walled layer with different color on the body,like touch mousing cover or PSP thin-walled transparent housing.Normally the thin-walled layer is only 0.7mm thick,there will be some dimension adjustment according to different material.

Why thin-walled part design,of couse  to reduce the raw material or some function required.There are few products ultilizing thin-walled double injection mold because there are many technical trouble during mold making and molding production.

Once we choose double injection mold,we have to face these problem.And have to spend much more time in trouble-shooting according to below mentioned situations before mold design.
1)Because of thin wall,the out surface of melt raw plastic material is very easy to cold down,which take much surface quality deficiency like air flow mark,welding lines.
2)Because of thin wall,there will be occur high injection pressure per unit acreage which can stop the melt material good  filling,and very easy to cause sealing-off airstream,which result in air burn,and short-shot problem.
3)Because of thin wall,need big size gating to supplement the injection pressure lose,also the high temperature around the gate will result in flow mark which is very hard to get rid of it by adjusting molding parameter.
4)because of thin wall,need high pressure to put the melt material going to ever corners.but the cold material caused during filling process is very difficult to be expelled from cavity,then cause cold melt material mark and short-shot, burning etc surface
quality problem.
Normally thin-wall mold like thin-walled bottle double injection mold,thin-walled housing double injecton mold will meet same situation,we should take care of the technical trouble shooting before the mold making.

Artical come from JK-MOLD,website is