In the process of using dry laminating machine, some users often encounter the problem of wrinkling of finished products. As a well-known multi-functional machine manufacturer in China, Beverly Machinery provides three solutions for the wrinkle problem of finished products:
1. Reduce the tension of the traction substrate. The film stretches too much, the shape is not enough, and the composite film wrinkles easily during cooling shrinkage. Properly reducing the running tension of the substrate reduces wrinkles.
2. Adjusting the flatness of the substrate If the guide rolls assembled on the dry laminating machine have parallelism errors, some plastic film-like substrates are liable to wrinkle on the guide rolls. In production, the flatness of the substrate can be adjusted by adjusting the position of the deflection roller. Of course, for personalized printing, we can also add some flattening rolls or bending rolls to the appropriate part before compounding to stretch the film.
3. Adjusting the pressure of the composite roll During the production process, special attention should be paid to adjusting the composite pressure between the two composite rolls. The composite pressure is uneven. For example, the pressure is too high, which is the most likely to cause wrinkling of the composite film.
In addition, cleaning the composite machine composite roll and replacing the damaged rubber press roll can also avoid wrinkling of the composite product. At the time of design, if a preheating roller is added before the compounding to preheat the surface of the second unwinding substrate, the temperature of the second unwinding substrate and the coated substrate before the composite is substantially the same, and the compounding can be prevented. The film is curled and deformed after cooling.