Hey guys! Did you know that in the world of plastic mold processing, we sometimes encounter those annoying issues like sink marks? Don't worry, today we're going to dive into the reasons behind them and how to solve them!

Firstly, if the plastic mold isn't cooled properly and the cooling time is insufficient, it can lead to serious deformation. So, we can't be careless about the cooling process.

Secondly, insufficient internal pressure within the mold can also cause sink marks. It's really a headache when that happens.

Lastly, variations in thickness across different parts of the product can also be a problem. In this case, we need to lower the barrel and mold temperatures, apply forced cooling to the areas with sink marks, add extra material to those areas, and control the design to minimize thickness differences.