1 working principle
塑化过程中，其前进和混合的动力都是来源于螺杆和料筒的相对旋转。 In the plasticizing process of plastic , its forward and mixing power comes from the relative rotation of the screw and the barrel. According to the different shapes of plastic in the screw groove, the screw is generally divided into three sections: solid conveying section (also called feeding section), melting section (also called compression section), and homogenization section (also called metering section).
2 Refurbishment process
The hardness of the inner surface of the barrel is higher than the screw, and its damage is later than the screw. The discard of the barrel is that the inner diameter increases with time. Its repair method is as follows:
1. The barrel with increased diameter due to wear. If there is still a certain nitriding layer, the inner hole of the barrel can be directly bored, ground to a new diameter, and then a new screw is prepared according to this diameter.
2. The inner diameter of the barrel is machined and trimmed to recast the alloy, the thickness is between 1 ~ 2mm, and then finished to the size.
3. In general, the homogenization section of the barrel wears quickly. This section (5 ~ 7D long) can be trimmed by boring, and then equipped with a nitrided alloy steel bushing. The inner hole diameter refers to the screw diameter. Normally fit the gap for processing and preparation.
After repairing, the plasticization parameters in the whole machine do not need to be modified, and its service life is much longer than the conventional material parts you purchased, bringing greater wealth to the rubber and plastics industry.
After the screw in the barrel is removed, use the cloth roll to clean the barrel when the barrel has excess temperature and the materials and other residues are soft. With light, check the inner wall of the barrel for abnormal scratches and scratches. Measure the change of the inner diameter of the barrel, and compare with the inner diameter of the barrel when not in use and before this use to determine the wear. Then check the other parts of the barrel for damage.
After the barrel is cleaned, do not apply oil to prevent rust.
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