In the process of blow molding products in Shanghai, many technical problems will be encountered. Below, the editor of Kunshan Juxinchang Company will discuss with you the causes of these problems and the corresponding solutions. I hope I can give you some opinions and suggestions to solve the problem.

1. When Shanghai blow molding products are processed, the longitudinal wall thickness of the finished product is not Uniformity
Causes:
①The parison sags under its own weight
②The diameter of the two vertical cross-sections of the blow molded product is too different
Countermeasures:
①Reduce The parison melt temperature, increase the parison extrusion rate, adjust the use of epoxy resin with a lower melt fluidity rate, and adjust the parison control equipment
② Moderately change the product design plan and use the bottom blow molding method

2. When Shanghai blow molding products are processed, the lateral wall thickness of the finished product is uneven
Reasons:
① Extrusion tilt of the parison
② Temperature inside and outside of the top block and mold core The difference is huge
③The product appearance design is asymmetrical
④The parison blowing ratio is too large
Countermeasures:
①Adjust the die gap width deviation to make the parison wall thickness uniform ;Before closing the mold, straighten the parison
②Raise or reduce the heating temperature of the mold sleeve to improve the temperature error inside and outside the die
③Before closing the mold, pre-clamp and pre-expand the parison so that The parison is moderately deflected towards the thicker wall direction
④ Reduce the parison blow-up ratio

3. Orange peel-like lines or black spots appear on the surface of the finished product during blow molding processing in Shanghai< br />Reasons:
① Poor mold exhaust
② Plastic mold water seepage or plastic mold concave mold condensation condition
③ Parison melting is poor, and the parison causes melt cracks Situation ④ Blowing air pressure
Insufficient
⑤ Blowing speed is relatively slow
⑥ Blowing ratio is very small
Countermeasures:
① Sandblasting the plastic mold parison , add vents
②Repair the plastic mold and adjust the cooling temperature of the plastic mold to above the "dew point"
③Reduce the extruder screw speed and increase the extruder heating temperature
④Increase High blowing air pressure
⑤Clean the compressed air channel and check whether the blowing rod is leaking
⑥Adjust the mold sleeve and mold core to increase the parison blowing ratio
Blow molding processing in Shanghai The product will undoubtedly encounter many other problems. If it is not easy to solve, you can consult the editor of Kunshan Juxinchang Company online.