Injection Molding
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Uneven breakage of PET bottle cap tamper-evident rings
Problem Phenomenon
When the PET bottle cap is opened, the tamper-evident ring breaks unevenly, with some remaining or not breaking at all.
Cause Analysis
The tamper-evident ring connecting bridge design is improper (too few bridges or too large a cross-section); '2079851475616104452 weld lines are at the connecting bridges; material formulation has an influence.
Solution
Optimize connecting bridge design (matching bridge number and cross-section); adjust gate position; adjust the formulation to make the breaking behavior consistent.
Key Takeaway
Uniform breaking of PET bottle cap tamper-evident rings requires fine structural design and material proportioning.
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