EVA car interior extruder | EVA car interior sheet extruder | sheet extruder

The rubber sheet extruder is homogenized or has inconsistent melt delivery capabilities, which can easily cause fluctuations in extrusion volume and pressure, which is detrimental to extrusion quality. Therefore, sometimes just to improve the ability of the feeding section to grab materials, a double-headed thread is installed in the feeding section to improve the conveying capacity of plastic particles. 3. The screw's homogenization or inconsistent melt conveying ability can easily cause fluctuations in extrusion volume and pressure, which is not conducive to extrusion quality. Therefore,. Feeding section: also called preheating section. Its main function is to compact and transport plastics. .Plasticizing section: Also known as the compression section, its function is to further compact and plasticize the plastic sent from the feeding section, and press the air trapped in the plastic back to the feeding port for discharge, and improve the thermal conductivity of the plastic. . 3. Homogenization section: also called the melting section, its function is to plasticize the viscous flow plastic that has been plasticized in the plasticization section more uniformly under the continuous action of temperature. 2. Screw cooling The purpose of screw cooling The main purpose is to facilitate the transportation of materials in the feeding section, and at the same time to prevent plastics from decomposing due to overheating, and to help the gas contained in the materials return from the cold mix in the feeding section and be discharged from the hopper. The cooling medium passed into the screw can be water or air. When using screw cooling water, you should pay attention to the following points. The flow rate of screw cooling water should not be too large. It should be an appropriate amount. Just touch the water with your hand and feel that the water is warm. When using screw cooling water, pay attention to changes in outer diameter. When the screw and traction speed are adapted, if the screw cooling water is used, the outer diameter of the wire and cable will easily become smaller and the insulation thickness will become thinner. During operation, water should be stopped when shutting down to prevent equipment accidents. The use of screw cooling water must be explained when changing shifts. 5. Screw maintenance The screw is the heart of plastic extrusion. Maintaining the screw well is the key to improving product output and quality. Therefore, the following issues should be noted: The screw is not allowed to idle when no plastic is added. When cleaning the screw, the screw should be padded flat and stable, and the screw should not be allowed to rotate to avoid damage to the screw. It is strictly forbidden to add metal objects into the barrel to avoid damage to the screw. When the temperature is too low or the heating temperature does not reach the lower limit of the process temperature, it is strictly forbidden to start the screw and use screw cooling water. When the temperature drops significantly and is low, the water cooling should be stopped and the water must be stopped when the machine is stopped. Clean the screw regularly. It is strictly prohibited to use metal instruments to hit the screw when cleaning the screw. Sometimes, just to improve the ability of the feeding section to grab materials, a double-headed thread is installed in the feeding section to improve the conveying capacity of plastic particles. 3. The segmentation of the screw and the basic functions of each section are divided according to the physical state changes and flow conditions of the plastic in the extruder and the basic functions of the screw. It can be roughly divided into a feeding section, a plasticizing section, and a homogenizing section.
3