The front nozzle is installed in the cylinder, connected with the machine barrel screw, is melt into the mold cavity channel, one of the main parts and plastic parts.
  1.Maintain the nozzle. In the installation of the nozzle, the nozzle center and requirements die bushing hole center in the same axis, the injection molding machine normal work is very important, therefore asked the nozzle and mold positioning sleeve contact portion must be accurate, laminating, fastening; regularly check the nozzle threaded portion of the intact, if found to wear or corrosion, should be promptly replaced; internal channels on the nozzle to remain intact, smooth, if there is clogging phenomenon, should be timely dredging; nozzle head is hemispherical liner, it should be in close contact with the mouth, cannot have the existence of the gap, if the head by the injury, it may not seal and the overflow of material, therefore, to check the market on the nozzle head, maintain its type blood shortage intact; check the nozzle channel circumstance, can use the method to air injection to observe the surface quality of the injection melt, thereby discriminating surface condition of the nozzle inner flow passage.
  2.The nozzle disassembly. The first ohmic heating barrel, so that the remaining material reaches the plasticizing temperature machine barrel, adding to clean the barrel special cleaning materials, as far as possible residual plastic extruder cylinder discharge; residual feed nozzle parts of total difficult to drain, therefore, should be heated nozzle or cylinder head, so that the plastic softening, melting; the residual warmth, with a special hammer, is a loose bolt nozzle, not all loose, knocking the gas in the nozzle, can remove the nozzle; nozzle internal clearance shall be carried out at high temperature, because the plastic is softened, from the nozzle to the injects mold release agents, so that the separation of plastics and internal, then remove from the nozzle.
  3.The nozzle repair. Nozzle mop if is unilateral contact or poor contact, the front end of the ball head will appear groove gas escape, if not timely repair, will give the injection adverse, if not deep grooves available oilstone dressing finishing; if the nozzle part is not normal impact and deformation, light person can use oilstone grinding, or need to be replaced if the nozzle channel; by strain or wear, to distinguish between treatment, because the nozzle channel diameter is small, to repair more difficult, need to be especially careful when the repair.