Particle screening device used in mixed plastic extruding and granulating project

Abstract

A particle screening device used in the mixed plastic extruding and granulating project comprises a sieve body. A feeding port and a discharging port are formed in the upper end and the lower end of the sieve body correspondingly. The sieve body is internally provided with a first screen, a second screen and a third screen from top to bottom. The position of the discharging port is further provided with a waste port. Material receiving devices making the first screen, the second screen and the third screen connected with the discharging port or making the first screen, the second screen and the third screen connected with the waste port are arranged at the lower ends of the first screen, the second screen and the third screen. The rear end of the sieve body is provided with a work box. Theparticle screening device can better screen materials, control is convenient, the screens can be completely cleaned, and the cleaning effect is good; and through the arrangement of the discharging port, the waste port and the material receiving devices, residues falling during cleaning can be prevented from entering a material collecting device through the discharging port.

Description

technical field [0001] The invention relates to the technical field of plastic manufacturing and processing, in particular to a particle screening device for extrusion and granulation of mixed plastics. Background technique [0002] The pelletizing part in the extrusion granulator is the main device in the auxiliary equipment of the extrusion pelletizing equipment. The pelletizing auxiliary equipment is divided into two types: hot cutting and cold cutting according to its working mode and function, and the hot cutting is mostly air-cooled. Pelletizing is carried out in a hot-cutting way. The air-cooled hot-cutting extruder includes a screw, a barrel, a perforated plate, a splitter cone, a strip-shaped material forming template, and a slicing knife. The formula is metered and compounded, added to the high-speed mixer and stirred evenly, then put into the barrel of the extruder granulator, plasticized and melted into a viscous fluid state, extruded from the perforated plate in...

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Problems solved by technology

[0003] The following problems will occur when the above two granulation methods are used to produce plastic granules. The plastic granules that are hot-cut by air are easy to stick, so that the cut plastic granules have different sizes. Therefore, after granulation, they need to be output through the air pressure pipeline, and then cooled, It can be used after sieving, but in the granulation process of the strip cutting method, because the tension of the strips cannot ensure that the sizes of the strip materials are exactly the same, the cut particles are of different sizes and need to be sieved. , the screening device is a device that screens plastic particles of different sizes through holes of different thicknesses above, which is convenient for further processing of plastics of different particle sizes, and can also be used to screen crushed plastics, and the particles that meet the particle size Finished products are screened out for easy processing of plastics

The screening efficiency of the existing screening device is not high during the screening process, and the plastic is easy to block the screen holes, which affects the screening effect of the screen holes, and when the materials are screened by the screen plate, the materials left on the screen are not easy to clean, which affects The next screening work of the sieving machine; when the sieve plate is blocked and fails, the sieve plate cannot be quickly replaced and dredged, and the service life of the sieve plate is low

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