Generally, the plastic and plastic device is provided with a whole rotary mechanism. In the disassembly screw injection molding machine nozzle, screw and barrel, should first unscrew the screw injection seat position, the original position and the deflection angle, the axis of the cylinder axis plane injection clamping device to avoid, in order to facilitate the disassembly and maintenance of screw, injection molding machine barrel.
Disassembly of screw nozzle of A. injection molding machine
If the barrel is the leftover material, should be heated to the melting temperature, the high thermal stability of polyolefin resin or special barrel cleaning materials, fully carry out high-speed cleaning, as residual molten material discharged before entering the demolition work, the residual material is always the nozzle parts can be completely discharged, so it should be heating nozzle or cylinder head, then remove the nozzle.
Injection molding machine screw nozzle heating up, with a special hammer percussion to make it loose, the bolt should not be all loose, in loose to 2/3 when gently knocking, to be released after the internal gas, and then the nozzle unloading.
Internal cleaning of the screw nozzle of the injection molding machine should be carried out under high temperature so as to remove the residual melt from the nozzle hole. The practice is to inject the mold release agent from the nozzle to the interior, that is, the material and the inner wall of the material are separated from the inner wall of the material from the side of the nozzle thread, and the material is separated from the inner wall, and the material is removed from the nozzle.
B. injection molding machine screw nozzle maintenance
The nozzle in contact with the die positioning sleeve part in production if unilateral contact or poor contact occurs, the front part of the spherical R will appear deformation, forming a groove melt escape, generate overflow nozzle, and the aperture part will appear deformation, so the material overflow should be timely check repair.
C. should regularly check the nozzle of the threaded part of the integrity of the situation and the side of the sealing surface of the machine, if the wear or corrosion is serious, should be replaced in a timely manner.
D. check the internal channel of the screw nozzle of the injection molding machine. The surface quality of the injection moulding strip can be observed by the injection molding, and the residual molten material discharged from the nozzle can accurately reproduce the flow channel in the nozzle. The residual amount and temperature distribution of the melt in the nozzle can be analyzed.