Machine head device capable of adjusting wall thickness of extrusion pipe

Abstract

The invention belongs to a machine head device capable of adjusting the wall thickness of an extrusion pipe without dismantling a core mould in a neck ring mould in the technical field of polymer material processing mechanical equipment. A core mould inner shaft is sequentially provided with a lower expansion sleeve, an upper expansion sleeve and a core mould inner cushion block, a thread arranged at the right end of an adjusting nut is screwed into a nut arranged at the right end of the core mould inner shaft; a machine diameter is used for connecting the head part of an extrusion machine screw, the periphery of the machine diameter is provided with a wavy line heating ring, a transition block is arranged into a mandrel and a main mould body from a left port of the main mould body, the mandrel is connected with the main mould body into a whole; a thread arranged at the left end of a core mould body is connected with an inner thread arranged at the right end of the mandrel into a whole; the neck ring mould is arranged at the left end of a pressure sleeve, an inner thread at the left end of the neck ring mould is correspondingly assembled and connected with an outer thread at the right end of the main mould body; the neck ring mould and the main mould body form a runner inner wall of an extrusion machine head, the inner diameter of the neck ring mould is the outer diameter of the extrusion pipe, and the outer diameter of the core mould body is the inner diameter of the extrusion pipe. The machine head device capable of adjusting the wall thickness of the extrusion pipe has the advantages of simple structure, labor, financial resources and energy sources saving, and the like.

Description

Technical field: [0001] The invention belongs to the technical field of macromolecular material processing machinery and equipment, and relates to an extruded pipe wall-thickness-adjustable machine head device that does not need to disassemble a core die in a die. Background technique: [0002] In the process of pipe extrusion molding of polymer materials and their composite materials, the material must pass through the core die and die of the extruder head to be formed into a pipe with a certain wall thickness. The existing extrusion pipe is to change the wall thickness of the extruded pipe by disassembling the head and replacing the inner core mold, which is extremely difficult to adjust the extrusion wall thickness in time and quickly when the new material is extruded and tested. It is convenient, time-consuming, labor-intensive, and consumables; at present, there is no device for quickly adjusting the wall thickness of the die of the extruder in production. In addition,...

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Problems solved by technology

The existing design is to take out the mandrel from the die when adjusting the wall thickness of the pipe, and then put in another mandrel to realize the adjustment; but this adjustment cannot realize stepless adjustment within a range, There is a lack of a technology that can quickly adjust the size of the die in production; moreover, when the wall thickness of the pipe is to be adjusted in the existing technology, the machine head must be cooled for 0.5 to 1 hour, and then it takes another 0.5 hour to disassemble and install the mandrel, and then reheat It also needs 0.5 hours to 1 hour, which is a waste of time and manpower. Therefore, the disadvantages of the existing technology are that it is time-consuming to adjust the wall thickness of the extruded pipe (time for disassembly, installation, cooling, and heating), and laborious (the operator needs to use a wrench to disassemble the original pipe). machine head, and then replaced with a new mandrel), consumables (requires a new mandrel, requires processing and production costs), energy consumption (cooling requires energy, and reheating requires heat energy)

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