What are the ways to reduce the wear of the screw


  Every kind of plastic has an ideal plasticizing […]






To remove debris in the plastic. Generally speaking, there is no debris in the fresh plastic purchased originally, but after transportation, weighing, drying, color mixing, and especially adding recycled materials, it may be mixed with debris.

It is as small as metal scraps, as large as heating coil nuts, paper clips, and even a bunch of warehouse keys. It has been mixed into the barrel. The damage to the screw is self-evident (the barrel will also be damaged at the same time. ), so it is necessary to install a magnet holder, and strictly manage and monitor the feeding.

The water content in the plastic has a certain effect on the wear of the screw surface. If the plastic is not completely drained of water before injection, when the remaining water enters the screw compression section, it will form "steam particles" with high temperature and pressure that are previously melted and mixed in the molten plastic. As the screw advances during the injection process, the From the chemical section to the head of the screw, these "steam particles" relieve pressure and expand during the injection process, just like tiny impurity hard particles, which have frictional damage to the wall.