" Povermolding " is actually a kind of secondary injection molding, products generally includes main body (hard plastic) parts and outsourcing (soft glue), in the mold manufacturing, manufacturing hard plastic main body first, hard plastic mould design program is designed according to the normal subject, outsourcing (soft glue) mold design to hard plastic products as a reference, need not put shrink again, after mold parts, with hard plastic on the main body, front mould have plastic bags shape is different, in Mr Production output hard plastic main body, and then put the hard plastic main body in the outsourcing mould, into the soft plastic injection molding production outsourcing
2. " overmolding " characteristics
1) calculate shrink when main hard plastic parts die design
2) "overmolding " usually has two independent sets of mould
3) soft package mold after the mold parts with hard plastic one to main body, to avoid a small amount of space, hard rubber for rubber and plastic parts to use subject to become a phantom
Note TPU material, the characteristics of itself is relatively easy to stick mold, product if you can do the sand sand as far as possible, so easy to release! Liquidity of TPU is slow, cooling cycle will be longer, as long as pay attention to some in the production process, also won't have much of a problem!