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A grinding method and device for thermoplastics

A technology of thermoplastics and grinding methods, which is applied in the direction of grain processing, etc., which can solve the problems of affecting the quality of plastics, failure to grind, high temperature, etc., and achieve the effect of preventing sticking and ensuring change

Active Publication Date: 2015-10-07
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Usually, plastic plastics adopt conventional mechanical grinding technology (such as ball mill, roller mill, etc.). High temperature generated during the process affects the quality of the plastic

Method used

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  • A grinding method and device for thermoplastics
  • A grinding method and device for thermoplastics
  • A grinding method and device for thermoplastics

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Embodiment Construction

[0029] The equipment that the present invention adopts except grinder 6, other equipments: air filter 1, feeding buffer bin 2, screw conveyor 3, electromagnetic separator 4, rotary unloader 5, Venturi conveyor 7, bag filter 8 , induced draft fan 9, and rotary unloader 10 are conventional equipment, which can be used in conjunction with standard selection and process.

[0030] Attached below figure 1 , the process flow of a grinding method for thermoplastics is described as follows:

[0031] After drying, the plastic powder that needs to be ground at a temperature of ~60°C enters the feeding buffer bin 2, and is transported to the electromagnetic separator 4 by the screw conveyor 3 to prevent the iron filings in the plastic powder from damaging the grinder 6. After iron filings are removed, it enters the rotary unloader 5 and sends the plastic powder into the rotor cavity of the grinder 6 continuously and evenly. Grinder 6 is mainly composed of transmission system, housing 1...

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Abstract

The invention discloses a thermoplastic plastic grinding method and a device. The method comprises the following steps: allowing plastic powder needing to be ground to enter a feeding surge bunker, conveying the powder into an electric magnetic iron remover for removing iron scraps through a screw conveyer, allowing the powder to enter a rotary discharger, and continuously and uniformly feeding the plastic powder into a rotor cavity of a grinding machine; performing cuttings grinding on thermoplastic plastics under the shear force action of blades by utilizing high-speed rotating blades which are uniformly distributed on an outer ring of the rotor, so that extruded sheet formation is avoided. Meanwhile, due to the shear action, high temperature generated by the process of grinding the qualified plastic fine powder is rapidly reduced by cold air, and the plastic fine powder is positioned in a high-dispersion fluidized state. According to the method and the device, adhesion of the plastic fine powder due to high temperature is avoided, characteristics of the thermoplastic plastics can be kept invariable, the defects of the conventional mechanical grinding technology are overcome, and the quality of the plastic fine powder is improved.

Description

technical field [0001] The invention provides a grinding method for thermoplastics, and relates to the technical field of airflow crushing and cooling of plastics in plastic devices. Background technique [0002] SEBS plastic is the English abbreviation of "hydrogenated styrene-butadiene-styrene block copolymer". It is a linear three-block copolymer with polystyrene as the end segment and ethylene-butylene copolymer obtained by hydrogenation of polybutadiene as the middle elastic block. It does not contain unsaturated double bonds and has good plasticity and High elasticity. Usually, conventional mechanical grinding techniques (such as ball mills, roller mills, etc.) are used for plastic plastics. Due to the plasticity of plastics, it is easy to extrude plastics into pieces first, and then due to the high elasticity of plastics, it is impossible to grind them. High temperature is generated during the process, which affects the quality of the plastic. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00
Inventor 赵旭张麦奎张万尧王瑞翟向楠
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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