Quick-open type screen change structure with heater

Abstract

The invention discloses a quick-open type screen change structure with a heater, comprising a perforated plate and a filter screen arranged in the perforated plate. The screen change structure is characterized by also comprising a clamping plate device used for fixing the perforated plate and the filter screen, wherein the clamping plate device is internally provided with a heater used for heating melting charges; and the heater is in an annular shape and surrounds the perforated plate and the filter screen for a circle. In the invention, the perforated plate and the filter screen are fixed between a front plate and a rear plate, and the front clamping plate and the rear clamping plate are connected through a movable hinge so as to be convenient for opening the front clamping plate and the rear clamping plate and quickly replacing and mounting the filter screen; the heater is arranged between the front clamping plate and the rear clamping plate to avoid the condition that the melting charges are condensed into blocks to block the filter screen, thereby guaranteeing the smooth flow of the melting charges and reducing the replacement and the cleaning of the filter screen. The quick-open type screen change structure has the advantages of convenient disassembly, time and labor saving and convenient cleaning.

Description

technical field [0001] The invention relates to a screen changing structure at the head part of an extruder, in particular to a quick-opening screen changing structure with a heater. Background technique [0002] The extruder is the most widely used equipment in polymer processing. The material passes through the action between the extruder barrel and the screw. While being heat-plasticized, it is pushed forward by the screw and continuously passes through the machine head to make various cross-section products. or semi-finished products. Generally, according to the type of polymer to be processed and the shape of the product or semi-finished product, select the extruder, head and die, as well as the corresponding auxiliary devices such as shaping and traction, and then determine the extrusion process conditions such as screw speed, head pressure , material temperature, and shaping temperature, traction speed, etc. In the extrusion process, the material is generally plasti...

AI Technical Summary

Problems solved by technology

However, the existing perforated plate and filter screen are fixed in the cylinder body of the machine head part, and are fixed by the threaded pressure sleeve of the machine head part. Through this screen changing structure, its structure is complicated, installation and disassembly are inconvenient, and the melting When the material is filtered, because the molten material condenses into blocks, it is easy to block the filter screen frequently, and it needs to be replaced and cleaned frequently.

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