Device for removing metal elements in regenerated plastic bottle flakes

Abstract

The invention belongs to the technical field of regenerated plastics, and particularly relates to a device for removing metal elements in regenerated plastic bottle flakes, which comprises a magnetic separation cylinder. An impurity material bin sleeves the magnetic separation cylinder, and a magnetic separation rod is horizontally inserted in a cylinder cavity of the magnetic separation cylinder; the magnetic separation rod consists of two sections of magnetic separation parts and a connecting part which is arranged between the two sections of magnetic separation parts and overhangs the end part; one section of magnetic separation part is located in a cylinder cavity of the magnetic separation cylinder, the adjacent connecting part is located in a cavity of the impurity material bin, the other section of magnetic separation part is located outside the cylinder cavity of the magnetic separation cylinder, and when the magnetic separation part located in the cylinder cavity of the magnetic separation cylinder moves outwards, the magnetic separation part located outside the cylinder cavity of the magnetic separation cylinder moves inwards. A scraping sleeve is arranged on the bin wall of the inner side of the impurity material bin and used for scraping away impurity chippings adsorbed to the magnetic separation part. According to the device for removing the metal elements in the regenerated plastic bottle flakes, the ferromagnetic metal chippings on the magnetic separation rod do not need to be cleared away without shutdown, and the magnetic separation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of recycled plastics, in particular to a device for removing metal elements in recycled plastic bottle flakes. Background technique [0002] Plastic is one of the great inventions of human beings, but it has also become a headache source of garbage and caused harm to the environment because it is difficult to degrade. In fact, waste plastics are not garbage, and waste can be turned into treasure through environmental protection treatment. Plastic bottles are a widely used plastic product. In the prior art, most plastic bottles use polyester (PET), polyethylene (PE), polypropylene (PP) as raw materials, add corresponding functional materials, after high temperature heating, blow molding, extrusion blowing or blow molding through plastic molds. Injection molding, therefore, most waste plastic bottles have great utilization value, such as being used as packaging materials, daily necessities, industrial suppli...

AI Technical Summary

Problems solved by technology

That is to say, the recycling of existing plastic bottles needs to be crushed. Although it has been cleaned, there will still be metals mixed in the plastic bottle flakes. The existence of these metals has a great impact on the screw and melt filter. Research and development Through the dismantling and analysis of the used melt filter, it was found that a lot of metal debris squeezed by the screw was embedded in the outer layer of the filter element, and a large amount of metal powder was accumulated on the inner mesh of the filter element. Metal powder cannot be removed during the calcination cleaning process. The presence of metal causes increased wear of the screw, resulting in a reduction in the service life of the screw and melt filter, which in turn increases production costs. In addition, recycled plastic mixed with metal will It will also affect the quality of the product, for example, the return of PET bottles will affect the spinning effect

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