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中空吹塑进程中轻易呈现的题目和处理计划吹塑进程中罕见题目有上厚下薄:延后预吹时候,或下降预吹压力,削减气流量.瓶颈下有皱折:预吹太晚或预吹压力太低,或此处坯冷却不好等.
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1. 底发白:瓶坯太冷;过分拉伸;预吹太早或预吹压太高。
2. 瓶底有缩小镜景象:瓶底料太多;预吹太迟,预吹压太低。
3. 瓶底外面有皱折:底部温度太高(浇口处冷却不好);预吹太晚预吹压力太低,流量太小。
4. 全部瓶浑浊(不通明):冷却不够。
5. 部分发白:过分拉伸,此处温度太低,或预吹太早,或碰着拉伸杆了。
6. 瓶底偏疼:与瓶坯温度、拉伸、预吹、高压吹等都能够有干系。下降瓶坯温度;加速拉伸速率;查抄拉杆头与底模间的空隙;延后预吹,减小预吹压力;延后高压吹;查抄瓶坯是不是偏疼
7. 上厚下薄:延后预吹时候,或下降预吹压力,削减气流量。
8. 下厚上薄:与上述相反。
9. 瓶颈下有皱折:预吹太晚或预吹压力太低,或此处坯冷却不好。
多层共挤吹塑机成品成型有哪些注重事变?
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