Injection Molding
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PVA surface tiger-skin pattern
Sorun Belirtisi
PVA injection molded product surface tiger-skin pattern, alternating light and dark stripes 2-5mm wide
Neden Analizi
Unstable injection speed, melt front fluctuating fast and slow; mold temperature on the low side <30°C, front cools rapidly
Çözüm
1) Multi-stage injection slow-fast-slow to stabilize the front; 2) Raise mold temperature to 40-50°C; 3) Increase injection pressure for stable advancement
Temel Çıkarım
Tiger-skin pattern is caused by unstable injection front; multi-stage injection and high mold temperature are the key
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