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What is the cause of foaming in the groove of the blister machine? How to solve it?

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What is the cause of foaming in the groove of the blister machine? How to solve it?

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  • Time of issue:2017-06-09 00:00
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What is the cause of foaming in the groove of the blister machine? How to solve it?
Blistering in the groove of the blister machine will generally cause large-area blister and local blister. Today, the editor of Yonghengsheng Blister Machine Net will give you an analysis of the specific reasons:
 
1. Large area blistering
Cause Analysis:
1. The temperature or pressure does not meet the requirements, causing false suction;
2. The amount of glue is not enough, the amount of spraying is small or the sheet is leaking;
3. Insufficient preheating (softening PVC film) or blister time (forming time);
4. After the blister is formed, the pressure is released before the temperature has dropped.
5. The heat resistance of the glue itself is not enough.
 
 Solution: 
1. Increase the temperature or vacuum;
2. Increase the amount of sizing and choose good quality plates;
3. Increase the preheating or molding time;
4. After blister molding, the temperature is cooled to room temperature or slightly higher before the vacuum is withdrawn.
5. Use with curing agent.
 
2. Local blistering
Cause Analysis:
1. Uneven spraying of glue results in a small amount of local glue and lower bonding strength;
2. The problem of PVC film. PVC film contains plasticizer. In the case of aging or heating, the plasticizer is easy to migrate to the surface and affect the bonding strength;
3. There is a problem with the heating tube in the blister machine, causing uneven temperature.
 
Solution:
1. Try to make the amount of glue sprayed evenly;
2. Use good quality PVC film;
3. Check and repair the equipment in time.
The full text above is about "What causes foaming in the groove of the blister machine? How to solve it? 》All contents, I hope to help you! Shenzhen Yonghengsheng Machinery Manufacturing Co., Ltd. has been committed to the development and supply of blister machines, Shenzhen blister machines, Shenzhen vacuum blister machines, Shenzhen thick sheet blister machines, Shenzhen blister forming machines for 16 years, and is a professional blister machine manufacturer ~Shenzhen Thermoforming Machine, Blister Machine Hotline: 0755-84817776
 
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