Continuous screen changer, screen changing device and extruder

Abstract

The invention relates to the technical field of extrusion molding equipment and particularly relates to a continuous screen changer, a screen changing device and an extruder. The continuous screen changer comprises an outer shell provided with an inner cavity and an inner roller which is contained in the inner cavity and rotates relative to the outer shell; a feeding hole, a screen changing hole and a discharging hole are formed in the outer shell; the inner roller is provided with at least four filter screen mounting grooves and material runners, wherein the at least four filter screen mounting grooves are uniformly distributed so as to mount filter screens, the material runners correspond to all the filter screen mounting grooves and are communicated with the filter screen mounting grooves, and a sealing wall connected with the inner wall of the inner cavity in a sealing way is formed between the two adjacent filter screen mounting grooves; materials flow out of the discharging hole along the material runners after entering the inner cavity along the feeding hole and being filtered through the filter screens in the filtering process; and the filter screen mounting groove opposite to the feeding hole rotates to be opposite to the screen changing hole in the rotating process, and the filter screen on the filter screen mounting groove is changed at the screen changing hole. By using the continuous screen changer, the filter screens can be continuously changed, so that equipment with the continuous screen changer can continuously work.

Description

technical field [0001] The invention relates to the technical field of extrusion molding equipment, in particular to a continuous screen changer, a screen changer and an extruder. Background technique [0002] Existing screen changers for extruders are mainly divided into two types, one is a manual screen changer; the other is a hydraulic pull-out screen changer. The operation method of the manual screen changer is to shut down the extruder first, and then take out the filter screen in the screen changer for replacement; while the hydraulic pull-out screen changer replaces the filter screen by pushing and pulling left and right, and then replaces the filter screen Sometimes, it will cause the extruded material on the extruder to stop, resulting in continuous production interruption, which directly affects the normal production of the extruder, and at the same time, a certain amount of waste will also be generated. Therefore, the screen changers of the above two existing ext...

AI Technical Summary

Problems solved by technology

The operation method of the manual screen changer is to shut down the extruder first, and then take out the filter screen in the screen changer for replacement; while the hydraulic pull-out screen changer replaces the filter screen by pushing and pulling left and right, and then replaces the filter screen Sometimes, it will cause the extruded material on the extruder to stop, resulting in continuous production interruption, which directly affects the normal production of the extruder, and at the same time, a certain amount of waste will also be generated.

Therefore, the screen changers of the above two existing extruders mainly have the following disadvantages: that is, when the filter screen is replaced, manual intervention is required, automation cannot be realized, time-consuming, laborious and material-consuming; and the production process will appear Interruption will directly affect the efficiency of production, and there is also the possibility of air entering the material, reducing the quality of the product

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