We often use PVC board in life. It is popular because of its stable use performance, but because the manufacturer may not operate properly during production, it will cause bubbles, which will reduce the use of The overall use effect, so today we come to understand what are the reasons for bubbles in the product during processing, interested friends can pay attention.
1. The injection speed is too fast during processing, which can trap the air and cannot be eliminated, forming air bubbles.
2, too much or too little feeding amount, injection pressure is too high, this phenomenon will also occur, such as appropriate adjustment of the PVC board feeding amount will improve this phenomenon.
3. There is a phenomenon of black line decomposition in the product, which is formed due to the high temperature. If the situation is not serious, you can lower the temperature appropriately. If the entire barrel is decomposed, you must disassemble the car to clean it.
4. In the cooling process of the PVC board, the cooling time is too short (especially for thick-walled products). The solution can be cooled outside the machine with cold water and cold compression molds.
5, the mold inlet is too small and the exhaust is not good, this phenomenon will also occur.
It can be seen that the main reason for the occurrence of bubbles during the processing of PVC boards is mainly due to its extrusion size and moisture. This requires that we try to avoid similar problems during production. At the same time, we must choose the appropriate one after purchasing. The warehouse should be stored to avoid its normal use effect after being wet, so that we pay more attention in daily life, and its use effect will be more stable.