Bag-making machine is composed of many devices, including storage device, frequency conversion device, whole bag device, control device and cutting device and so on. Each different device plays an important role in the production process of bag-making machine. The three main points of bag-making are temperature, pressure and material tension. This requires the operator to first of all to make a little understanding of the mechanical principle of bag-making equipment, familiar with the use of equipment groups and parameter Settings, adjustment, only after mastering the above, combined with the characteristics of the material and the length of the bag, can be handy to use the equipment, make smooth and beautiful pocket. So, temperature regulation should master what skills? Because polymer has no definite melting point, it is a melting temperature range, that is, there is a temperature region between the solid and liquid phase, when heated to this temperature region, the film enters the melting state. The viscosity temperature and decomposition temperature of polymer are the lower limit and upper limit of heat sealing respectively, and the difference between viscosity temperature and decomposition temperature is an important factor to measure the difficulty of heat sealing. The heat sealing temperature is set according to the characteristics of the heat sealing material, the thickness of the film, the number of hot sealing pressing and the size of the heat sealing area. The same part of the hot pressing times increase, the temperature can be appropriately reduced, when the heat sealing area is large, the temperature can be slightly higher. There is a heat sealing process in the process of making bags. The main function of the heat sealing process is to heat the adhesive film layer to a more ideal viscous flow state. When heat sealing the bag, the thickness of the film of different materials, The Times of heat sealing and pressing, and the size of the heat sealing area should be considered comprehensively. When the PVC plastic is heated to this temperature range, the film will enter the molten state, thus contributing to the molding of the bag. At this time, the upper limit and lower limit of the temperature range respectively represent the decomposition temperature and viscous flow temperature of PVC, and the difference between them is the key to determine the difficulty of heat sealing.
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