A hydraulic semi-automatic screen changing device for an extruder

Abstract

The invention relates to a hydraulic (semi-automatic) automatic screen replacing device of a plastic extruding machine. The hydraulic (semi-automatic) automatic screen replacing device is characterized by comprising a walking lifting platform assembly, a space positioning table assembly and a hydraulic rotating arm assembly; the walking lifting platform assembly is composed of fixing trundles, table leg frames, a hydraulic oil cylinder, a base, a lifting rotary handle, lifting guide rails and a threaded lifting column; the space positioning table assembly is composed of a cross-shaped workingtable guide rail a, a linear guide rail, a first stepping motor, a motor frame, a coupler, corner fixing plates, a second stepping motor, a cross-shaped working table guide rail b and a third steppingmotor; and the hydraulic rotating arm assembly is composed of a wrench socket, a fixing disc, a guide rail sliding block, a lead screw, a hydraulic wrench oil inlet and outlet, a hydraulic wrench andphotoelectric positioning sensors. According to the hydraulic (semi-automatic) automatic screen replacing device, the problems that the working environment temperature is high and the labor intensityis high when a filter screen of the plastic extruding machine is manually replaced, and raw materials are wasted due to the fact that fluorine plastic is solidified in the shutdown period are solved,so that the (semi-automation) automation of filter screen replacement of the plastic extruding machine equipment is realized.

Description

technical field [0001] The invention relates to the application field of electromechanical integration technology, and relates to a (semi) automatic replacement device for extruder filter screens. Background technique [0002] The extruder is an important plastic machine, and the production and manufacture of most plastic products can be realized by extrusion molding. Fluoroplastic raw materials are heated, melted, plasticized, and extruded. Impurities in the raw materials and solid particles of unmelted raw materials hang on the filter screen in the form of residues, resulting in blockage of the extrusion flow channel or product defects. At present, the extruder in an enterprise needs to replace the filter screen inside the extrusion end of the granulator after working continuously for about 40 minutes. [0003] The replacement of the filter screen has the following problems: First, because the working temperature of the extruded end cap of the granulator is as high as 300...

AI Technical Summary

Problems solved by technology

[0003] The replacement of the filter screen has the following problems: First, because the working temperature of the extruded end cap of the granulator is as high as 300 ° C, the working environment of disassembling the end cap, cleaning the residual glue, and replacing the filter screen by manual screen replacement is harsh and labor-intensive. The operation time is long (about 5-10 minutes), and there are major safety hazards

The second is that during the shutdown period when the filter is replaced, the hot-melt fluoroplastics that have not been extruded from the barrel will solidify due to cooling, which will cause changes in physical properties and become unusable, resulting in waste of fluoroplastic raw materials

When replacing the filter screen, in order to prevent material leakage, the output of the main engine needs to be adjusted. At the same time, there are disadvantages of long filter replacement operation time and time, which is not conducive to the operation in actual production, and the sealing is difficult, and the melt is easy to leak from the sealing surface.

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