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
