Precision injection molding is a tool for producing plastic products: it is also a tool that gives plastic products a complete structure and precise dimensions. Then, in the precision injection molding process, the guide column damage is sometimes encountered. Why?
The guide column plays a leading role in the mold to ensure that the molding surfaces of the core and the cavity do not touch each other under any circumstances, and the guide column cannot be used as a force member or a positioning member.

In the following cases, when the needle is moved, the fixed mold will have a huge lateral offset force:
(1) When the wall thickness of the plastic parts is not uniform, the velocity of the material flow through the thick wall is large, and a large pressure occurs here;
(2) The side surfaces of the plastic parts are asymmetrical, such as the opposite pressures on the opposite side surfaces of the mold of the stepped parting surface.