Injection molding

You might find it hard to imagine that a remote control shell, if missing that nearly invisible "draft angle," might never be able to come out of its mold intact.

When plastic cools and solidifies inside a mold, it shrinks and tightly grips the mold's core. If the side walls of the shell are perfectly perpendicular to the mold-opening direction, demolding it becomes like forcefully pulling out a tightly sucked plug—the resistance is enormous. Forcibly ejecting it could, at best, leave ugly "scratch marks" on the surface, and at worst, cause the shell to deform and become scrap.

Therefore, when engineers design shells like those for remote controls, they must reserve a subtle but critical small angle on the side walls—typically between 1° and 3°. This angle creates a tiny gap between the part and the mold the moment it opens, allowing for smooth demolding and protecting the smooth appearance from damage.

If you have the design drawings of your product, you can contact us at Haina Mold to have them analyzed for you. We welcome you to ask us any 

questions. 

Web：https://www.hainamould.com/

Email：ciky@hainamould.com