Because it is new, the injection molding machine screw nozzle, installation screw and barrel, the first injection should be positioning screw loosen, the deflection Angle to the original position, the injection molding machine barrel axis away from the axis of the clamping device, to facilitate the disassembling of injection molding machine screw, barrel and maintenance.
1. Remove the screw nozzle of the injection molding machine.
If the barrel inside leftover material, should be heated to plasticizing temperature, with high thermal stability of polyolefin resin or barrel for cleaning materials, fully, high-speed clean, as far as possible from the residual material, can enter the disassembly work, as a result of the nozzle parts residual material always cannot all eduction, reason should be heating nozzle or barrel head, then remove the nozzle.
When the screw nozzle of the injection molding machine is heated up, it will be loosened with a special hammer, and the bolt should not be completely loose. It will be gently tapped at the time of 2/3. When the internal gas is released, the nozzle will be unloaded.
The internal cleaning of the screw nozzle of the injection molding machine should be carried out at high temperature in order to remove the residual melt from the nozzle hole.The method is to inject the release agent from the nozzle to the internal wall, i.e., the material and the inner wall are separated from the side of the nozzle, so that the material is separated from the inner wall and the material is removed from the nozzle.
2. Maintenance and maintenance of the screw nozzle of the injection molding machine.
Nozzle and mould positioning of parts in production if unilateral contact or poor contact, the front end of the spherical R part can appear deformation, the formation of the melt escape the groove, produce the nozzle material overflow, and diameter part also can appear deformation, so the material overflow should check repair in time.
3. Check the thread part of the nozzle and the sealing surface on the side of the cylinder. If the wear or corrosion is serious, replace it in time.
4. Check the internal channel of the injection molding machine screw nozzle.The surface quality of the injection strip can be observed by the air injection molding, and the residual melt from the nozzle can accurately reproduce the flow condition in the nozzle.The residual quantity and temperature distribution of the melt in the nozzle can be analyzed.