Screw extrusion type film recycling and granulating device

Abstract

The invention relates to the technical field of film recovery and discloses a screw extrusion type film recycling and granulating device. The device comprises a granulation cylinder, a feeding screw rod,, a plasticizing screw rod and a granulation screw rod, wherein the feeding screw rod, the plasticizing screw rod and the granulation screw rod are arranged in the granulation cylinder; the feedingscrew rod runs through the length direction of the granulating cylinder, the feeding screw rod is meshed with the head end of the plasticizing screw rod, the granulating screw rod is meshed with thetail end of the plasticizing screw rod, a plurality of granulating teeth are arranged on a screw edge of the granulating screw rod, a feeding port is formed in the middle section of the feeding screwrod of the granulating cylinder, and a discharging port is formed in the granulating cylinder and corresponds to the screw edge of the granulating screw rod. Waste plastic film leftover materials areuniformly conveyed through the feeding screw rod; plasticized plastic is obtained through the granulating screw rod with granulation teeth after being plasticized through a plasticizing screw rod, andplastic particles with uniform sizes are prepared from the plasticized plastic; and the device is good in film material granulation adaptability, capable of guaranteeing stable conveying of plastic films, free of heating in the whole process, good in particle material mechanical property keeping, uniform in particle, high in machining efficiency and wide in material application range.

Description

technical field [0001] The invention relates to the technical field of film recycling, in particular to a screw extrusion type film recycling and granulation device. Background technique [0002] Plastic film is the largest and most widely used product in the application of plastic products. Its application fields not only involve industry, but also involve the daily life of people. Traditional plastic film forming processes include bubble blown film method, casting method, multi-roller calendering method, laminating method, etc. However, in all film processing and forming processes, there is a trimming process, which removes the edges of the film during processing. Trim removal, which creates a lot of scrap. Compared with the waste produced by injection molding and other molding methods, these waste materials have higher material purity, lower material thermal degradation process, and less loss of mechanical properties. Therefore, they can be recycled and used as a high-en...

AI Technical Summary

Problems solved by technology

[0003] Because the film scraps are usually thin films, the discarded film waste has a low apparent density, and it is difficult to use the traditional crushing and re-extrusion granulation process for processing. This process is inefficient for materials with low apparent density. The processing cost is high, and multiple high-temperature treatments will increase the thermal history of the plastic, increase the risk of thermal degradation, and reduce the physical properties of the material

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