Nonstop long-acting filter for extruder

Abstract

The invention relates to a nonstop long-acting filter for extruder, which comprises a filter-cylinder housing and filtering devices disposed inside the filter cylinder housing, and is characterized in that the filter cylinder housing is equipped with a feed inlet and a feed outlet; two parallelly arranged filtering devices, which are spare mutually, are disposed inside the filter screen housing; a spliter plate is disposed between the two filtering devices; charging chambers are formed by the inner wall of the filter screen housing, the sidewall of the spliter plate and the filter screens; discharging chambers are formed between the inner wall of the filter screen cylinder and fluid separation bodies; the two ends of the spliter plate are respectively a charging end which communicates with the charging chamber and a discharge end which communicates with the discharging chamber; an inlet reversing valve is disposed on the charging end and an inlet of the inlet reversing valve communicates with the feed inlet; an outlet reversing valve is disposed on the discharge end and an outlet of the outlet reversing valve communicates with the feed outlet; one end of the filtering device is equipped with a bulkhead, which is detachably installed on the filter cylinder housing. Two parallelly arranged filtering devices are adopted to accomplish the nonstop filtering screen changing operation and meet the requirement of continuous production.

Description

technical field [0001] The invention relates to the technical field of filters for plastic machinery, in particular to a non-stop long-term filter for extruders. Background technique [0002] In plastic machinery, the filter is also a key component. The plastic raw material is extruded by the heating screw of the extruder and then enters the filter screen device. Since most of the plastic raw materials cannot be used to produce products from brand new materials, it is necessary to add various Auxiliary raw materials, such as color materials, modifiers, etc., will also add a certain proportion of recycled materials to recyclable plastics. Since these auxiliary materials contain more impurities, impurities in extruded products will affect the post-processing of the product And use, the filter can filter the material and improve the mixing effect of the material, so the filter has become an indispensable part. A traditional long-term filter includes a filter cartridge housing,...

AI Technical Summary

Problems solved by technology

It has an impact on the subsequent process of continuous production. After the shutdown is replaced and the filter is repaired, it needs to be heated again and re-enter the subsequent process, which wastes energy, produces defective products, and causes waste.

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