In order to make the block structure dense, the PUR hot melt glue laminating machine is installed in a plastic film bag, sealed after vacuuming, placed in hot water in the container, and the container is sealed and pressurized to 30 Mpa or more. The structure which is loose after being uniformly pressed in the water becomes uniform and dense, which ensures the consistency of the electrical performance index of the component and effectively improves the quality of the product.
The working principle of the PUR hot melt glue is the same. That is to apply a certain amount of pressure on the surface of the multilayer material to tightly press together these materials. The difference is that the conditions of the press are different depending on the purpose of the lamination.
The key to the lamination process of the PUR hot melt glue is pressure control. The greater the pressure, the better the product quality. The specific requirements are: the pressure rise should be stable, the pressure control accuracy should be high, the constant pressure time should be accurately controlled, and the product should be evenly pressed in all directions. In order to meet the lamination process and product production requirements, the main design of the equipment should include the loading and unloading system, heating system, pressure system and protection system. www.cnyudajixie.com