How to repair the barrel of the injection molding machine?

Update: 2020/11/23
Summary:

  The inner surface hardness of the injection molding m […]

  The inner surface hardness of the injection molding machine barrel is higher than that of the injection molding machine screw, and its damage comes later than the injection molding machine screw. The scrap of the injection molding machine barrel is the increase in the inner diameter due to time wear. Its repair method is as follows:
  1. For the barrel with increased diameter due to wear, if there is a certain nitriding layer, the inner hole of the barrel can be directly bored and ground to a new diameter size, and then a new screw can be 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 size.
3. Under normal circumstances, the homogenization section of the barrel wears quickly. This section (take 5~7D length) can be trimmed by boring, and then equipped with a nitrided alloy steel bushing. The diameter of the inner hole refers to the diameter of the screw. Normally fit the clearance and process and prepare. To
   After repair, the plasticization parameters in the whole machine do not need to be modified.

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