an extrusion head

Abstract

A disclosed extruder head comprises an outer mold, a mouth mold, a core mold, a core rod, a connection cylinder and a mesh plate; the outer mold is provided with an opened mold cavity; the core mold is held by the opened mold cavity, and a fused material flow channel is formed between the core mold and the outer mold; the mesh plate is fixedly between inner walls of the connection cylinder; and one end of the core mold is fixedly connected with the mesh plate, and the other end of the core mold is fixedly connected with the core rod. One end of the core mold of the extruder head is directly fixedly connected with the mesh plate, and the other end of the core mold is fixedly connected with the core rod, compared with a conventional technology that a flow-splitting cone is fixedly disposed on an outer mold via multiple support ribs, the fused material flow channel between the core mold and the outer mold is inside provided with a support rib, so that the nonuniform fused material phenomenon caused by obstruction of the support rib when a fused material passes through the fused material flow channel in an extrusion process is avoided, the phenomenon that a tube generates cracks because of the nonuniform fused material does not happen, and the easy cracking phenomenon caused by cracks is avoided, and therefore, a tube extruded from the extruder head is free of cracks, good in appearance and not easy to crack.

Description

technical field [0001] The invention relates to an extruder head of an extruder. Background technique [0002] At present, the extruder head of the heat-shrinkable tube extruder includes an outer die 10', a die 20', a core die 30', a connecting cylinder 40', a press female 50', a mesh plate 60' and a mandrel 70'. [0003] The outer mold 10' is provided with an open cavity 11'. The core mold 30' is accommodated in the open mold cavity 11', and a molten material flow channel 111' is formed between the core mold 30' and the inner wall of the open mold cavity 11' of the outer mold 10'. Wherein, the core mold 30' is fixedly connected with the outer mold 10' through the supporting ribs 80'. [0004] One end of the outer mold 10' is fixedly connected to the die 20', and the other end of the outer mold 10' is fixedly connected to the connecting cylinder 40', wherein the open cavity 11' communicates with the cavity of the connecting cylinder 40'. The connecting cylinder 40' is fix...

AI Technical Summary

Problems solved by technology

[0005] However, the core mold 30' of the extruder head is fixedly connected to the outer mold 10' through the support ribs 80', and the support ribs 80' are arranged in the molten material flow channel 111'. The phenomenon of uneven melting caused by the blocking of the support rib 80', the uneven melting will cause the extruded pipe to have marks, and the pipe is easy to crack due to the marks

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