Vacuum exhaust type electromagnetic temperature-sensitive automatic plasticizing extruder

Abstract

A vacuum exhaust type electromagnetic temperature-sensitive automatic plasticizing extruder comprises a screw, the screw is arranged in a barrel, the screw sequentially comprises a first-order screw and a second-order screw along a feeding direction, the first-order is composed of a feeding section, a first compression section and a first homogenizing section, the second-order screw is composed of an exhaust section, a second compression section and a second homogenizing section, the exhaust vent on the exhaust section is connected with a vacuum pump, a position on the barrel corresponding to the first compression section is provided with an electromagnetic induction heater, and the vacuum pump is connected with a waste processing device. The combination of a vacuum exhaust type plasticizing technology and the electromagnetic induction heater avoids the appearance of phenomena comprising coking carbonization and bad low-temperature plasticizing effect, allows a material to be uniformly heated, and improves the stability of the production process. The output is greatly improved, the comprehensive power consumption is reduced by 30%, and the extruder can be easily operated by one person. Two persons are saved and the production efficiency is improved by above 3 times under same productivity.

Description

Technical field: [0001] The invention belongs to a mechanical device, in particular to a vacuum exhaust type electromagnetic temperature sensing automatic plasticizing extruder. Background technique: [0002] In the traditional high-temperature plasticizing method, it is actually a thermomechanical method, an extruder method, or a twin-screw mechanical regeneration method. The main feature of this method is continuous production, no pressure, and dry operation. When a twin-screw extruder is started, the screw of the extruder causes the recycled polypropylene material to move up and down alternately, thereby heating it to 200-280°C. The heat source partly relies on external heating, and the special structure of the screw makes the waste polypropylene alternately compress and expand when the screw moves up and down and changes its stroke, which will cause the depolymerization of waste polypropylene and reduce its mechanical properties. This is the root cause of the low quali...

AI Technical Summary

Problems solved by technology

The heat source partly relies on external heating. The special structure of the screw makes the waste polypropylene alternately compress and expand when the screw moves up and down and changes its stroke, which will cause the depolymerization of waste polypropylene and reduce its mechanical properties.

This is the root cause of the low quality of the recycled polypropylene masterbatch and the high volatility of the product

Since hot air is the exchange medium, oxygen accelerates the oxidation reaction of polypropylene under the action of heat, which inevitably leads to thermal oxidation of polypropylene, which leads to a decline in product quality

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