Pet Preform Manufacturers Should Deal With Product Defects

Posted by preform nicole on March 25th, 2019

The whitening of the bottom of the PET bottle is annoying for many Pet Preform Manufacturers. How can we completely eliminate the whitening of the bottom of the pet preform? Here are a few useful methods:
1. Strengthen insulation measures, increase the temperature of the hot nozzle at the location, and appropriately increase the temperature of the material.
2, speed up the injection speed, reduce the pressure, slow down the cooling water flow rate
3, to ensure drying for more than four hours, increase the material temperature, increase the screw speed
4, check whether the dry material temperature is too small or the injection volume does not match, must ensure that the raw material is dried at 165 degrees to a moisture content of less than 0.0 2%
5, strengthen cooling, thin wall thickness, strengthen cooling water, extend cooling time, change injection time, reduce pressure.
Reason for the depression above the shoulder of the pet preform bottle:
cause :
1. The air knife is not heated uniformly.
2. The upper part of the preform is too cold.
3. There is water on the preform.
Solution:
1. Adjust the heating temperature or heating time of the air knife.
2. Shorten the cooling time and check the cooling water circulation of the injection mold.
3. Check for water leakage on the injection mold cavity, lip, and core.
Jilian Plastic Mould is a professional Pet Preform Mould design and manufacturer with many years of experience in the market. We can provide you with professional design solutions according to the development of the market and your specific needs to ensure that our products can Meet your needs.