an extruder

Abstract

The invention relates to an extruder, which comprises a machine barrel, a screw, a flange and a mold body. The ends of the flanges are fitted with each other, and a splitter cone is arranged coaxially inside the flange, and the taper surface of the splitter cone is set toward the screw, and a guide plate is detachably installed on the inner wall of the barrel on one side of the flange, and the guide plate The end face of the pipe is opened along its circumferential direction with several obliquely arranged first diversion holes and second diversion holes, and the diversion plate is arranged between the discharge ends of the plurality of first diversion holes and the second diversion holes. There is a dislocation guide plate used to guide the material to replace the extrusion direction, and the dislocation guide plate is parallel to the taper surface of the splitter cone. The invention has the replacement of the flow direction of the melt, so that the outer wall of the pipe after final extrusion is smooth and impurity, and the quality of the finished pipe is improved, and the non-compliance rate and the scrap rate are all reduced.

Description

technical field [0001] The invention relates to the technical field of pipe processing, in particular to an extruder. Background technique [0002] The plastic extruder is mainly composed of extrusion system, transmission system and heating and cooling system; when the extrusion system is heated to a given process temperature and kept warm for a period of time, the raw material particles are poured into the hopper set at one end of the plastic extruder , so that the raw material particles can be smoothly introduced into the barrel under the action of its own weight or the thrust of the feeder. In the subsequent molding, the raw material particles need to complete the process of conveying→compacting→compressing→melting and plasticizing→homogenizing into a uniform solution in the barrel. [0003] Normally, the extruder consists of three sections, and is represented by three sections of the screw. The first section is the feeding section and is close to the hopper. Its main fun...

AI Technical Summary

Problems solved by technology

[0004] After the screw is used for a long time, it is often due to factors such as frequent switching between high-temperature materials and low-temperature materials, the shedding of the electroplating layer of the screw, and the production of fireproof materials such as PBT materials and PC materials, which will lead to carbonization on the outer extension of the screw and the inner wall of the barrel, forming impurities. There will be uneven black impurity stripes on the surface of the extruded pipe, which will affect the appearance and eventually lead to the substandard quality inspection. Therefore, the above problems need to be improved urgently

Images