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PET Bottle Bottom Material Accumulation (Thick Bottom)
Fenómeno do problema
The material thickness at the center of the bottle bottom is too large, the cost is high and the bottom is whitened.
Análise das causas
Excessive bottom heating or the stretch rod did not pull the material into place; improper bottom mold temperature.
Solução
①Reduce the bottom lamp zone power; ②optimize the stretch rod stroke and speed; ③check bottom mold cooling; ④adjust pre-blow.
Conclusão principal
Thick bottom = too much heat at the bottom, the rod not in place.
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