Rotary filter for purifying fusant of plastic extrusion system

Abstract

The invention discloses a rotary filter for purifying a fusant of a plastic extrusion system. The rotary filter comprises a feeding end machine body and a discharging end machine body; a filter net disc is arranged between the feeding end machine body and the discharging end machine body through a connecting and fastening element; the filter net disc generates rotary motion through the matched action of a detent type transmission device; the filter net disc is provided with a plurality of filtering passages formed by a plurality of filter net holes; the filter net disc is tightly covered by the feeding end machine body and the discharging end machine body; the feeding end machine body is provided with a net exchanging chamber; the outside of the net exchanging chamber is provided with a door body which can open or lock the net exchanging chamber; by opening or locking the net exchanging chamber by the door body, the rotary filter conveniently and safely completes the exchange of a new net sheet and an old net sheet of the filter net holes under the condition of ensuring almost unchanged pressure in high-pressure production.

Description

technical field [0001] The invention relates to a melt purification filter used in plastic extrusion production, in particular to a rotary filter used for purification of melt in a plastic extrusion system. Background technique [0002] In the field of production and extrusion of plastic plates, sheets, and films, the filter is an accessory device connected between the extruder and the die, and the molten medium at the feed end is filtered through the filter mesh inside the filter and promoted again. Plasticizing to meet the requirements of the manufactured product. [0003] At present, most of the filter structures used in the industry are intermittent screen-changing structures. The basic principle is that under normal working conditions, the molten medium at the feed end is filtered through the internal filter mesh. The configured control system changes the screen. During the screen change period, the flow of the molten medium will be blocked, so that during the intermit...

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