1. Wrinkling
(1) The spacing between narrow and long workpieces is too small; (2) The edges and corners around the upper surface of the cushion plate are not chamfered; (3) The distance between the horizontal and vertical directions of the workpiece is not in a straight line, which increases the resistance of air flow; (4) The set temperature is too high; (5) The time to reach the set pressure is too long.
2. La Bai
(1) The set temperature is too high; (2) The time to reach the set pressure is too long; (3) The line type is not suitable.
Edge not firmly adhered:
(1) The quality of the glue is not good; (2) The activation temperature of the adhesive is too high; (3) The temperature of the equipment cannot reach the required activation temperature at the edge of the workpiece; (4) The workpiece pad is not suitable; (5) Poor or no PVC backing adhesive performance; (6) The adhesive has expired or does not meet the storage requirements; (7) Leakage or improper spraying method.
When quality problems occur, the process or parameters should be adjusted item by item based on the above reasons and recorded. It is important to avoid adjusting multiple process parameters or processes simultaneously, otherwise the true cause of quality problems will be difficult to identify, and it will also be difficult to establish and adjust process standards for the production environment to provide objective basis.