How to repair the barrel of an injection molding machine?

If the injection molding machine barrel fails, do you know how to repair it? Because the inner surface of the barrel of an injection molding machine is harder than the screw, its damage comes later than the screw. The scrap of the injection molding machine barrel is the increase in the inner diameter due to time wear, so the next step will tell you how to repair it:
　　The repair method of the injection molding machine barrel 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 re-cast the alloy, the thickness is between 1~2mm, and then finished to size. To
3. Under normal circumstances, the homogenization section of the barrel wears quickly. This section (take 5~7D long) 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 conical twin screw barrel. Normally fit the clearance and process and prepare.