Surface treatment and service life of injection molding machine screw
Published:
2022-10-13 11:51
We have emphasized many times that the screw barrel is the most critical and soul part of the injection molding machine. During the injection molding process, plastic raw materials enter the barrel of the injection molding machine from the tail. The screw rotates in the barrel, extrudes and pushes the plastic particles and their fillers, blends and plasticizes in the advance, and injects the screw head into the mold cavity. At this time, the barrel and screw bear certain high temperature and high pressure of different plastics, and the working temperature of the screw of the injection molding machine is also different.
We have emphasized many times that the screw barrel is the most critical and soul part of the injection molding machine. During the injection molding process, plastic raw materials enter the barrel of the injection molding machine from the tail. The screw rotates in the barrel, extrudes and pushes the plastic particles and their fillers, blends and plasticizes in the advance, and injects the screw head into the mold cavity. At this time, the barrel and screw bear certain high temperature and high pressure of different plastics, and the working temperature of the screw of the injection molding machine is also different.
Screw barrel is often scrapped due to excessive clearance caused by wear and can not be squeezed or injected normally. The wear increases the clearance between the cylinders of the screw edging machine, which leads to the reduction of the melting rate and the pumping capacity, resulting in uneven material temperature and pressure fluctuations, resulting in a decline in product quality, a reduction in productivity and an increase in energy consumption. Compared with the barrel, the screw is more prone to damage and failure.
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Functional characteristics of exhaust screw
In the extrusion process, the gas to be discharged from the raw material includes three parts: the air brought in between the raw material particles; Moisture adsorbed on granular materials; Gases or liquids contained in raw materials, such as residual monomers, low molecular volatiles and water, etc.
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Parameters of extruder screw exhaust section
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Surface treatment and service life of injection molding machine screw
We have emphasized many times that the screw barrel is the most critical and soul part of the injection molding machine. During the injection molding process, plastic raw materials enter the barrel of the injection molding machine from the tail. The screw rotates in the barrel, extrudes and pushes the plastic particles and their fillers, blends and plasticizes in the advance, and injects the screw head into the mold cavity. At this time, the barrel and screw bear certain high temperature and high pressure of different plastics, and the working temperature of the screw of the injection molding machine is also different.
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Introduction to the principle of ball screw
Ball screw has been widely used in all electric servo injection molding machine because of its high mechanical efficiency and high compliance performance. The ball screw is a motion pair that uses the ball as the power transmission interface between the screw and the nut to roll. Ball screw is mainly developed for the purpose of machine tool driving device, and its development purpose is to achieve position accuracy and smoothness. Ball screws have been successfully used in precision machinery, automation, various power transmission, semiconductor, medical and aerospace industries.
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