SCREW BROKEN

INJECTION MOLD SCREW BROKEN PROBLEM

A screw design for injection molding is fairly described as “revolutionary” because it turns conventional plastication theory on its head. Decades-old single-screw theory holds that melting should be accomplished almost entirely by shear heating from mechanical work (friction) imparted by the screw. According to this theory, barrel heaters are used only to prevent heat loss to the environment.

Broken reasons

1.      Injection pressure high

2.      Injection time high

3.      Barrel not clear before machine power off

4.      Material low temperature before injection

5.      All cavity not open properly

6.      Wrong parameter setting

7.      Power failure problem

8.      Wrong material for wrong screw

9.      Material wrong mixing

10.  Machine position problem