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material build up at the die head

Author	Topic: material build up at the die head
billsplas Junior Member	posted 03-26-2002 04:01 PM we have been experiencing a material build up on some of our die heads on two of our newer lines. the material is leaking out or catching the material looks like its burnt in colr on clear LDPE we are blending repro with virgin im wondering if it might be a high melt material in my repro. or maybe a machine problem. IP: Logged
Steve H Moderator	posted 03-28-2002 01:40 PM Hi Bill What's happening with the melt temps on these lines compared to your others. Where is the repro coming from, inhouse or brought in? Have you pulled the dies apart on these lines lately? Have you checked the MI of the incoming repro? Steve H IP: Logged
BrianAndLiz Junior Member	posted 11-14-2002 02:19 PM Check your heats on the die stack! We had a buildup issue on a line, turns out that one of the heater controls had crashed and was cooking the resin, causing some of it to degrade and build up on the lip. IP: Logged
Bob Cunningham Junior Member	posted 11-20-2002 10:10 AM What is the melt index of your material? What die gap are you using? Is it radiused? What coating is on the die head - nickel, chrome, Thin Dense Chrome, Titanium Nitride, etc.? -Bob Cunningham IP: Logged

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