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Airflow spherification reactor and method for preparing polymer-based spherical powder material by same

A powder material and reactor technology, applied in the field of 3D printing, can solve the problems of poor powder mixing effect and powder shape, large consumption of organic solvent, low production efficiency, etc., and achieve the goal of adjusting product performance, excellent mechanical properties, and preventing accumulation Effect

Active Publication Date: 2018-09-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cryogenic pulverization method is simple to operate, but the powder mixing effect and powder shape are poor; the powder prepared by the solvent precipitation method is uniform in size and uniformly mixed, but the operation is complicated and the production efficiency is low; the spray drying method consumes a large amount of organic solvents, which may be harmful to the environment. create pollution

Method used

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  • Airflow spherification reactor and method for preparing polymer-based spherical powder material by same
  • Airflow spherification reactor and method for preparing polymer-based spherical powder material by same

Examples

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Embodiment 1

[0041] Reference attached figure 1 and 2 . An airflow spheroidization reactor comprises a powder material conveying system, a reactor body, a condensing system and a cyclone separator assembly connected in sequence.

[0042] The powder material conveying system includes an air heater 12 , a feeder 15 and a feed nozzle 17 , one end of the feeder 15 is connected to the air heater 12 , and the other end is connected to the reactor body through the feed nozzle 17 .

[0043] The reactor body includes a tubular gasifier 1, an electric heating wire 2, a thermocouple 3, a junction box 4, an insulation layer 5, and an insulation shell 6. The electric heating wire 2 is wound on the outer layer of the tubular gasification furnace 1, and the The tubular gasifier 1 is heated to compensate the heat in the reactor. The thermocouple 3 runs straight through the inner wall of the tubular gasifier 1 along the radial direction to monitor the internal temperature of the reactor. The insulation...

Embodiment 2

[0050] The airflow spheroidization reactor of Example 1 is used to prepare polymer-based spherical powder materials, air is provided by an air compressor, and solid powder materials are provided by feeder 15, and the air flow flows through the lower part of feeder 15 to take away solid powder materials to form The gas-solid mixture enters the reactor body through the feeding nozzle 17. It is further heated in the reactor body. Through gas-solid heat transfer, the temperature of the reactor cavity is heated above the melting point of the powder material, so that the solid powder material is completely melted. For solidification and forming, the cyclone separator 8 is used for gas-solid separation, and the silo 11 collects spherical powder materials.

Embodiment 3

[0052] The difference from the airflow spheroidization reactor in Example 1 is that the powder material conveying system also includes a corrugated hose 13 connecting the air heater 12 and the inlet of the tubular gasifier 1 . At the entrance of the reactor body, the central feeding nozzle provides materials for the reactor body, and the corrugated hose 13 provides preheated air to form a protective airflow for the central material. After the two airflows enter the reactor, they are mixed and dispersed to prevent the material from sticking to the wall and agglomerating , which is conducive to maintaining the shape of the product.

[0053] When in use, the air flow spheroidization reactor is provided with compressed air by an air compressor, the compressed air is preheated by the air heater 12, and then divided into two streams, one stream flows through the feeder 15 The lower part takes away the solid powder material to form a gas-solid mixture, which enters the reactor body f...

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Abstract

The invention discloses an airflow spherification reactor and a method for preparing a polymer-based spherical powder material by the same. The reactor comprises a powder material conveying system, aheating reactor body, a condensing system and a cyclone separator which are connected in sequence, wherein the powder material conveying system is used for uniformly dispersing the powder material andenabling the powder material to enter the reactor with temperature higher than the melting point of the powder material, so that the solid powder material is molten and changes into spheres under theaction of surface tension, the spheres then enter the condensing system to be cooled and shaped, gas-solid separation is realized by the cyclone separator, and the polymer-based powder material withhigh sphericity is prepared finally. The reactor has the advantages of simple structure, low cost, high production efficiency and wide application range. Aftertreatment is not needed with adoption ofair as a dispersion medium, and the method is convenient and quick, can achieve continuous mass production and can be applied to various thermoplastic polymers such as nylon, polyetheretherketone, polystyrene and composite materials of the polymers. The prepared powder material has the advantages of high sphericity, good fluidity, narrow particle size distribution and the like.

Description

technical field [0001] The invention relates to an airflow spheroidization reactor and a method for preparing polymer-based spherical powder materials by using the same, belonging to the technical field of 3D printing. Background technique [0002] 3D printing technology is an advanced manufacturing technology that has developed rapidly in the past 30 years. It uses CAD software to design a three-dimensional model of a part, and adopts the method of accumulating materials layer by layer to manufacture entities. It is a low-dimensional material additive manufacturing method. Its characteristics Yes: free boundaries, layer upon layer. [0003] Selective laser sintering (selective laser sintering, SLS) technology is a 3D printing technology, proposed by Deckard in the United States in 1988, and successfully developed the first selective laser sintering prototype, in 1989 obtained the selective laser sintering technology The first patent. This technology is based on the discre...

Claims

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Application Information

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IPC IPC(8): B29B9/10B33Y70/00
CPCB29B9/10B33Y70/00B29B9/16B29B2009/166
Inventor 白时兵宋世平陈宁
Owner SICHUAN UNIV
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