Plastic processing dimensional instability reasons

Plastic processing dimensional instability reasons:

1. Equipment 

-  Feeding system is not normal

-  Back pressure instability or temperature control instability

-  Hydraulic system failure

2. Plastic mould 

-  Uneven gate and runner dimensions

-  Cavity size is not accurate

3. Technology

-  Mold temperature uneven or mold temperature control is not reasonable because of improper cooling line
-  Low injection pressure

-  Injection holding time is insufficient or fluctuation

-  High barrel temperature or unstable injection cycle

4.  Plastic raw materials

-  For batch production, resin properties change

-  Material particle size is irregular

-  High moisture content