Molds & Tooling
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EVA foaming mold temperature unevenness
Problem Phenomenon
Different positions of the same mold have different foaming degrees.
Cause Analysis
Unreasonable design of the mold heating channels causes a temperature difference exceeding 10°C; aging of heating elements also causes local temperature deviation.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
①Optimize the mold heating channel design; ②adopt a high-precision temperature control system; ③regularly test the mold temperature distribution; ④replace aged heating elements.; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Mold temperature uniformity is the hardware foundation of foaming consistency; regular heat distribution testing should be included in maintenance.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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