Melt rotating fast filter for extruder

Abstract

The melt rotating fast filter for extruder consists of mold body, filtering net plate and hydraulic assembly. The split mold body includes material feeding mold body and discharge mold body connected with screws; the ratchet wheel type filtering net plate is fixed with one rotating shaft between the material feeding mold body and the discharge mold body and has several filtering net holes with filtering net inside; the hydraulic assembly connected onto the fixing seat of the oil cylinder includes two parts of a hydraulic cylinder and a draw hook; and the draw hook set on the piston rod has roller unit clamped to ratchet of the filtering net plate. The present invention can realize non-stop fast net replacement, and has great filtering area and clear melt passage maintained during net replacement, small resistance change of the filtering net and less melt pressure fluctuation in the system.

Description

technical field [0001] The invention relates to an extruder melt filter, in particular to an extruder melt rotary fast filter. Background technique [0002] The filter is a kind of auxiliary equipment specially used for the production of plastic sheets and film extruders, and is used to filter the melt flowing out of the extruder. Existing filters are hydraulically controlled, consisting of a mold body, a filter screen, hydraulic components and seals. The filter screen is generally a straight plate, with one end built into the mold body, and the screen needs to be changed when the machine is stopped. ; There are a plurality of filter mesh holes on the screen plate. Generally, there is only one filter mesh hole corresponding to the through hole of the flow channel of the mold body during work. Such a structure makes the filter area of ​​the screen plate relatively small, and in the process of changing the screen, Due to the blockage of the melt channel, the resistance of the...

AI Technical Summary

Problems solved by technology

Existing filters are hydraulically controlled, consisting of a mold body, a filter screen, hydraulic components and seals. The filter screen is generally a straight plate, with one end built into the mold body, and the screen needs to be changed when the machine is stopped. ; There are a plurality of filter mesh holes on the screen plate. Generally, there is only one filter mesh hole corresponding to the through hole of the flow channel of the mold body during work. Such a structure makes the filter area of ​​the screen plate relatively small, and in the process of changing the screen, Due to the blockage of the melt channel, the resistance of the melt when it passes through the filter screen changes from large to small, and the change is large, which causes the pressure in the system to fluctuate greatly, and it takes a certain amount of time to resume normal production, resulting in a certain raw material waste

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