hydraulic screen changer for film-blowing
Blowing film has the characteristic of high pressure in production applications. When selecting a hydraulic screen changer, we will design the internal structure of the changer based on the characteristics of the product, completely eliminating the fluctuations caused by melt pressure and temperature during the screen changing process, and improving the quality of film products.
Drip irrigation belts, water hoses, and drip irrigation pipes have high equipment speed, high production pressure, thin product thickness, and high requirements for the pressure bearing capacity of the mesh changer. Zhengzhou Bate Melt Pump Company has specially designed the mesh changer based on this characteristic. The hydraulic screen changer for film-blowing adopts an integral structure, and the equipment is composed of the main body of the mesh changer, slide plates, high-temperature oil cylinders, mesh blocks, heaters, etc. The sealing components are made of special alloy steel, which has been quenched, tempered, and nitrided, It is specially processed through multiple processes such as precision grinding, with a pressure bearing capacity of 55Mpa. The production pressure can ensure no deformation and no material leakage, and an automatic compensation sealing structure is designed. The higher the extrusion pressure, the tighter the seal. Coupled with an energy storage fast hydraulic station, it can achieve non-stop screen changing, no material leakage, high pressure resistance, high temperature resistance, convenient screen changing, simple operation, and less waste during screen changing.
Most PEs are used for blown film processing, and either general low density PE (LDPE) or linear low density PE (LLDPE) can be used. HDPE film grade is generally used in areas where superior tensile strength and good impermeability are required. For example, HDPE film is commonly used in commodity bags, grocery bags, and food packaging. PE film processing generally uses ordinary blow film processing or flat extrusion processing method.
The continuous use of a extrusion screen changer in the production of new materials can increase the plasticization and homogeneity of the melt, and is also a necessary guarantee for the quality of the blown film. Although there are almost no impurities in the new material, in actual production, factors such as impurities in the environment, transportation, and work also exist. Therefore, installing a screen changer is also a necessary quality guarantee. The use of recycled materials and leftover materials requires the use of non-stop screen changers to expand production capacity, reduce costs, improve efficiency, and increase benefits.
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