Email:sales03@tzyuno.com Taizhou Huangyan YUNO Mould Factory

Taizhou Huangyan YUNO Mould Factory

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Contact:Mrs. Young yang 
Mobile: 0086-18267666869
Tel: 0086-576-84055252
E-mail: sales03@tzyuno.com     18267666869@163.com   
Add: NO.28 Zhuling Northindustry , Huangyan, Taizhou city ,Zhejiang,China
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Common Defects of PET Preforms in Hot Runner Injection Molding (5)

Common Defects of PET Preforms in Hot Runner Injection Molding (5)

Defect 11: Bottle Gating Brushing

    The cause of the defect:

                           1. Bad insulation

                           2. Insufficient cooling

                           3. There is pressure inside the heat flow

                           4. Bad screw check

                           5. Pressure is too low

    Defects processing method:

                           1. Guarantee gate insulation

                           2. Increase cooling

                           3. Reinforce backward cable

                           4. Clean the screw

                           5. Increase pressure


Defect 12: Bending of the preform after stripping

    The cause of the defect:

                          1. Gate eccentricity

                          2. Uneven cooling

    Defects processing method:

                          1. Fix the mold

                          2. Reduce pressure

                          3. Increase the injection speed

                          4. Extended cooling

                          5. Clean waterways

                          6. Increase cooling water pressure


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