Injection Molding
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TPE injection speed SBS/SEBS
Problem Phenomenon
High-speed injection of the SBS system causes air traps, low speed of the SEBS system causes flow marks
Cause Analysis
TPE injection speed is graded by system: medium speed for SBS systems, high speed for SEBS systems; high-speed injection of the SEBS system combined with sufficient venting is not prone to air traps; high speed of the SBS system easily generates shear heat
Solution
①medium-speed injection for SBS systems; ②high-speed injection for SEBS systems; ③venting system designed to match the speed; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The TPE speed strategy is graded by system; SBS seeks stability and SEBS seeks speed, and venting is the prerequisite for high speed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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