Screw injection molding machines is the object of focus on maintenance. Plastics melt temperature did not meet the requirements of the process are not allowed to drive. Barrel without feed screw does not allow for a long time (no more than 2-3min) empty running and hard foreign material into the machine with non-degenerate outside of the screw maintenance requirements as well as the following items.
　　① screw removal. Barrel flange and the front end of the nozzle after the demolition, you can use a special tool (as shown from the top of the screw tail screws) Remove the screw, and remove the screw tip of the screw head, check ring and the seal ring.
　　② disassemble the parts immediately separated steel brush to remove dry residue on the surface of the material, the clean-up can be coated with a release agent or mineral oil in some parts of the surface, and to facilitate the pits at the threaded portion of the residual material in addition to green.
　　③ If the dry residual material on the part already cool sclerosis, can the check ring, seal ring member to release an oven heated, melted and then let the residual material removed.
　　④ check the parts after cleaning. If the screw, check ring and the seal ring emblem light scratches and surface friction share damage. Available fine emery cloth or fine whetstone grinding is smooth; badly worn beyond repair parts should be replaced with new parts; for pits and screw off Ming stratification occurs locally, and can be surfacing after grinding.

　　Injection molding machine screw how maintenance should be careful
　　Removing the parts should use a special tool, not allowed to use a hammer, if necessary, can only be beat with a wooden stick or copper hammer type tools. When removing the parts surface residual material only brush to clean copper can not be beat with a spatula or filing and other tools. Before assembling the parts, connecting thread between twenty to be coated with a high temperature grease (such as molybdenum disulfide, etc.), in order to facilitate the next maintenance disassembly; note the more protection against skin damage cleaning solvents.