Extruder filter system and application thereof

Abstract

The invention relates to an extruder filter system and application thereof. The filter system includes a filter body connected to an extruder, a filter screen plate, a continuous filter screen and a filter screen traction system. The filter body is connected to the tail of the extruder cylinder, the filter screen plate is disposed in the filter body and matches with an extruder flow channel in shape, both sides of the filter body are equipped with filter screen channels, the continuous filter screen enters the filter body through the filter screen channels, passes through the filter screen plate, comes out from the other side of the filter body and is connected to the filter screen traction system, which pulls the continuous filter screen to move in the filter body. The extruder filter system provided by the invention has the advantages of small extruder melt pressure fluctuation and effective control in the filtering process, synchronous implementation of filter screen filtering and washing, repeated use of the filter screen, and high resource utilization rate.

Description

Technical field: [0001] The invention relates to a filter system, in particular to an extruder filter system and its application. Background technique: [0002] In the extrusion processing industry of plastic products, due to the requirements for product quality, it is often necessary to use a filter to filter the molten plastic in the extruder barrel during the extrusion process. In the plastic recycling process, using a filter to filter the plastic melt is an important means to improve the performance of recycled plastics. Since recycled plastic raw materials often contain a large amount of impurities such as metals, silt, and high-melting point plastics, usually the extruder of recycled plastics will install a filtration system between the tail of the extrusion screw and the extrusion die. [0003] The traditional extrusion filter adopts a double-stroke screen change system. During the screen change process, manpower or oil cylinders are used as power to drive the filter...

AI Technical Summary

Problems solved by technology

This design can reduce the melt fluctuation during the screen changing process, but it still has a certain impact on the production process

[0006] At the same time, in the process of using the screen changer, there is also the problem of recycling and reusing the filter. At present, most companies throw away the filter without treatment. A small number of companies use fire to burn the organic matter on the filter. Plastic, roughly clean the impurities on the filter and use it again

However, this treatment method will cause environmental pollution in the process of incinerating the filter screen. The high temperature in the incineration process will reduce the service life of the filter screen, and the impurities on the filter screen will not be cleaned thoroughly.

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