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Hot runner nozzle runner problem & Bad color change, color mixing

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Hot runner nozzle runner problem & Bad color change, color mixing

How hot runner nozzle affect product color change?

Reasons:

1. Plastic corrosion

2. The plastic in the hot runner nozzle wasn't cleaned very well during color changing

3. The channel of hot runner nozzle is not smooth enough during machining 


Solutions: 

1. Polish the runner of hot runner nozzle


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