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Method for pelletizing plastic powder

A technology of plastic powder and plastic, applied in the field of plastic processing, can solve the problems of collapse, irregular shape of powder materials, and inability to meet the precision and strength requirements of terminal printing devices.

Inactive Publication Date: 2014-12-03
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic powder is the most common 3D printing consumable. It has the advantages of low printing temperature, good adhesion, and simple raw material preparation methods. shape, granular, block or rod, which will cause the printed device to be prone to hollow, deformation, collapse and other phenomena, which cannot meet the industrial precision and strength requirements of the terminal printed device

Method used

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  • Method for pelletizing plastic powder
  • Method for pelletizing plastic powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The plastic powder spheroidization method of the present embodiment includes:

[0046] a. Select 100 parts to take PEEK plastic raw material powder with a particle size of 1-2mm;

[0047] b. Add the raw materials selected in step a to 50 parts of modified high-temperature solvent oil, heat and stir to mix the two evenly; stir for 5 hours, and the stirring speed is 800r / min;

[0048] c. Stop heating, the mixed solution gradually cools down, and the plastic powder gradually precipitates and hardens;

[0049] d, the plastic powder product obtained in step c;

[0050] in:

[0051] The heating temperature of step b is 350°C, and the stirring speed is 800r / min;

[0052] In step c, the temperature decrease rate is 2°C / min; the stirring is continued during the precipitation of the plastic powder, and the stirring rate gradually decreases as the temperature decreases;

[0053] The particle size range of the plastic powder material obtained by the method of this embodiment is...

Embodiment 2

[0055] The plastic powder spheroidization method of the present embodiment includes:

[0056] Choose 100 parts of PS plastic raw material powder (its particle diameter is about 2mm, such as figure 1 shown);

[0057] Add the raw materials selected in step a to 50 parts of butanol and heat and stir to make the two evenly mixed;

[0058] Stop heating, the mixed solution gradually cools down, and the plastic powder gradually precipitates and hardens;

[0059] Washing and drying the plastic powder obtained in step c to obtain a product;

[0060] in:

[0061] The heating temperature of step b is 80°C, and the stirring speed is 750r / min;

[0062] In step c, the temperature decrease rate is 1.5° C. / min; the stirring is continued during the precipitation of the plastic powder, and the stirring speed gradually decreases with the decrease of the temperature; the plastic powder is separated and rinsed and then dried.

[0063] The plastic powder material that the present embodiment me...

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Abstract

The invention discloses a method for pelletizing plastic powder. The method comprises the following steps of: a, selecting plastic raw material powder to be refined; b, adding raw materials selected from the step a to a dispersing medium, and heating and stirring to uniformly mix the raw materials and the dispersing medium; c, stopping heating, wherein the temperature of a mixed solution is gradually reduced, and the plastic powder is gradually precipitated and hardened; d, cleaning and drying a plastic powder product obtained from the step c, wherein plastics to be refined and the dispersing medium are insoluble with each other, and the heating temperature of the step b is higher than the softening points of the plastics to be refined and lower than the boiling point of the dispersing medium. According to the method, firstly the plastic powder is dispersed in the dispersing medium, then a dispersion solution is heated and stirred, the plastic powder is in a liquid drop shape (or a semi-fused shape) at the time and is continuously crushed and refined under the action of shearing force to form fine liquid drops, and the fine liquid drops are gradually solidified with the reduction of temperature to form superfine plastic powder; and the liquid drops have a very high surface tension effect in the process, so that the finally obtained plastic powder has very high roundness.

Description

technical field [0001] The invention belongs to the field of plastic processing, and relates to a plastic powder spheroidization method, in particular to a method for preparing 3D printing raw materials by spheroidizing plastic powder. Background technique [0002] 3D printing technology is a kind of additive manufacturing technology. It has the advantages of high material utilization rate, direct printing of products according to design drawings, unlimited design space, and no need for product assembly. It is especially suitable for manufacturing complex structural parts. [0003] At present, 3D printing technology has been widely used in consumer electronics, automobiles, aerospace, molds, national defense and military industry, industrial design, regenerative medicine and other fields, and countries all over the world have also shown strong interest in 3D printing technology and formulated Relevant strategic planning, such as the "National Advanced Manufacturing Strategic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/16C08J3/12C08L61/16C08L25/06
Inventor 张代军黎静谭陆西
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI