Blow Molding Equipment Operation and Maintenance
From the perspective of a blow molding equipment technician, this article systematically explains the working principles, standardized operation procedures, and typical problem-solving solutions for blow molding equipment.
I. Equipment Operation Mechanism Analysis
- Thermoplastic materials melt and plasticize inside the heating barrel, forming a parison through screw extrusion.
- The parison is inflated and formed inside a closed mold using compressed air.
- After cooling and solidification, the demolding process is completed.
II. Standardized Operation Procedures
1. Pre-Startup Inspection Items
- Electrical system insulation testing
- Pneumatic system pressure calibration
- Lubrication system oil level confirmation
2. Process Parameter Setting Specifications
- Barrel temperature zone control (180-220 degrees Celsius)
- Mold constant temperature system regulation (10-30 degrees Celsius)
- Blowing pressure gradient setting (0.8-1.2 MPa)
3. Production Safety Precautions
- Protective device effectiveness verification
- Emergency brake function testing
- Mold area anti-scald measures
III. Typical Fault Diagnosis and Troubleshooting
1. Uneven Product Wall Thickness
- Check parison temperature uniformity
- Calibrate blowing pressure curve
- Verify mold alignment accuracy
2. Surface Defect Treatment
- Fogging phenomenon: Reduce material temperature and extend cooling time
- Flow mark issues: Adjust injection speed and holding pressure parameters
3. Mechanical System Abnormalities
- Transmission noise: Check gearbox oil quality and gear clearance
- Hydraulic fluctuation: Inspect filter clogging condition and oil temperature status
Conclusion
Mastering equipment operation principles and maintenance key points can effectively improve product qualification rates and extend equipment service life. Regular maintenance and prompt troubleshooting are the foundation of efficient blow molding production.
