In the above article, Liyou Machinery has explained in detail the common factors in the production process of screw packing machines. The next part is also shared with everyone.
3, hot seal problem
The low-temperature thermal sealing property is mainly determined by the performance of the thermal sealing resin, and it is also related to the pressure. Generally, the extrusion temperature is higher when extruding composite, and the corona treatment is too strong or the film is parked too long will reduce the low-temperature thermal sealing performance of the material. Thermal adhesion is used to describe the strength of the melt surface of the heat seal that is not sufficiently cooled and cured after the heat seal: this external force often occurs in an automatic filling screw Packer. Therefore, the automatic packaging of composite film coil material, should choose a good thermal adhesive hot seal material. Anti-pollution thermal sealing, also known as thermal sealing of inclusions, refers to the performance of thermal sealing when the thermal cover adheres to the content or other pollutants.
The composite membrane selects different heat sealing resins according to different packaged materials, unasked screw packaging machines, and different packaging conditions(temperature, speed, etc.). It can not adopt a heat sealing layer in a uniform manner. For packaging with poor heat resistance, low-temperature heat sealing materials should be selected. For heavy packing, hot sealing materials with high mechanical strength and good impact performance should be selected. For high speed screw Packing Machine, hot sealing materials with low temperature and high thermal adhesive strength should be selected, and hot sealing materials with good pollution resistance should be selected for products with strong pollution such as powders and liquids.
4, friction coefficient problem
Friction in the packaging process is often both drag and drag force, so its size should be controlled within the appropriate range. Automatic packaging of coil material, generally requires a small inner friction coefficient and an appropriate outer friction coefficient, the outer friction coefficient is too large, will cause excessive resistance during the packaging process, causing material tensile deformation, if too small may cause dragging mechanism slip, Causing the electric eye to track and dislocate the location. However, the inner friction coefficient can not be too small, and some screw Packers have too little friction coefficient in the inner layer, which will cause instability of the stack when the bag is formed, resulting in wrong edges; For the composite film for strip packaging, the friction coefficient of the inner layer is too small and may cause the tablet or capsule to slip, resulting in inaccurate positioning of the material.
The friction coefficient of the inner layer of the composite film mainly depends on the content of the opening agent and smoothing agent of the inner layer material and the stiffness and smoothness of the film. The corona treatment surface, curing temperature and time in the production process will also affect the friction coefficient of the product. When studying the coefficient of friction, special attention should be paid to the fact that temperature has a great influence on the coefficient of friction. Therefore, it is not only necessary to measure the coefficient of friction at room temperature, but also to investigate the coefficient of friction at the actual use of ambient temperature.
The above is Dongguan screw packing machine supplier small editing and finishing all the introduction, more relevant information, please pay attention to liyou machinery official website news update in time. Liyou Machinery focuses on the development and production of electro-optic flower equipment, folding box machines, folding box machines, suction bubble shell Packers, screw packaging folding box machines, aircraft box folding box machines and so on.
