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A 3D printing forming method of high-voltage electric conversion polymer material crystal form

A polymer material and 3D printing technology, which is applied in the direction of liquid material additive processing, additive processing, and processed material handling, etc., can solve problems such as the inability to realize polycrystalline polymer printing crystal form control, and achieve shape controllable, The effect of safe system operation and low maintenance cost

Active Publication Date: 2019-08-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Additive manufacturing technology, also known as 3D printing, is one of the main methods of material processing and molding. It is a rapid prototyping technology based on computer-aided design, based on digital model files, and forming products according to the principle of layer-by-layer accumulation. However, in Under 3D printing technology, it is impossible to realize the printing crystal form control conversion problem of polycrystalline polymers. Therefore, by placing the material under high voltage conditions, the molten polymer can be controlled with a high ratio of single crystal form conversion.

Method used

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  • A 3D printing forming method of high-voltage electric conversion polymer material crystal form
  • A 3D printing forming method of high-voltage electric conversion polymer material crystal form

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Feeding: Feed pyroelectric materials such as polyvinylidene fluoride (PVDF) wire into the nozzle of the 3D printer and clamp it tightly. Set the temperature of the nozzle to 210°C, the outer diameter of the nozzle to 0.3mm, and the distance between the nozzle and the collection platform. The distance is 100cm;

[0033] 2) Connect to the high-voltage power supply: Connect the two poles of the high-voltage power supply to the nozzle of the 3D printer and the collection platform respectively, set the high voltage value, and the voltage value is 100KV;

[0034] 3) Set process parameters: feed speed is generally 20mm / s; nozzle temperature is generally 210-240°C; filling rate is 20%; layer thickness is 0.1mm, and idling speed is generally 150mm / s.

[0035] figure 2 It is a comparison chart of crystal form changes of the product prepared according to Example 1 of the present invention tested by X-ray diffraction, as shown in figure 2 As shown, it can be seen from the fi...

Embodiment 2

[0037] 1) Feeding: Feed pyroelectric materials such as polychlorotrifluoroethylene (PCTFE) wire into the nozzle of the 3D printer and clamp it tightly. Set the temperature of the nozzle to 240°C, the outer diameter of the nozzle to 0.3mm, and the distance between the nozzle and the collection platform The distance is 0.1mm;

[0038] 2) Connect to the high-voltage power supply: Connect the two poles of the high-voltage power supply to the nozzle of the 3D printer and the collection platform respectively, set the high voltage value, and the voltage value is 100V;

[0039] 3) Set process parameters: feed speed is generally 20mm / s; nozzle temperature is generally 210-240°C; filling rate is 20%; layer thickness is 0.1mm, and idling speed is generally 150mm / s.

[0040] The prepared product is tested by X-ray diffraction, and it is found that the crystal form changes.

Embodiment 3

[0042] 1) Feeding: Feed pyroelectric materials such as polyvinyl fluoride (PVF) wire into the nozzle of the 3D printer and clamp it tightly. Set the temperature of the nozzle to 210°C, the outer diameter of the nozzle to 0.4mm, and the distance between the nozzle and the collection platform to be 0.05mm;

[0043] 2) Connect to the high-voltage power supply: Connect the two poles of the high-voltage power supply to the nozzle of the 3D printer and the collection platform respectively, set the high voltage value, and the voltage value is 200KV;

[0044] 3) Set process parameters: feed speed is generally 20mm / s; nozzle temperature is generally 210-240°C; filling rate is 20%; layer thickness is 0.1mm, and idling speed is generally 150mm / s.

[0045] The prepared product is tested by X-ray diffraction, and it is found that the crystal form changes.

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Abstract

The invention belongs to the field of material processing and forming, and discloses a 3D printing and forming method for a high-voltage electricity transformation high polymer material crystal form.The method is characterized in that in a 3D printing process, high-voltage electricity is applied between a spray nozzle and a collecting platform to form high-voltage electric fields, so that the sequence of crystalline high-molecular polymers, in the high-voltage electric fields, of molten liquid sprayed out from the spray nozzle is changed to be orderly from unordered, and therefore, transformation of the crystal form is realized, and polymer with a high rate and a single crystal form is finally obtained on the collecting platform. The 3D printing and forming method realizes high-rate single-crystal-form transformation control of molten high-molecular polymer and obtains high-performances products; and the preparation method is simple, is low in cost and is wide in scope of application.

Description

technical field [0001] The invention belongs to the field of material processing and forming, and more specifically relates to a 3D printing and forming method of high-voltage electric transformation polymer material crystal form. Background technique [0002] Additive manufacturing technology, also known as 3D printing, is one of the main methods of material processing and molding. It is a rapid prototyping technology based on computer-aided design, based on digital model files, and forming products according to the principle of layer-by-layer accumulation. However, in Under 3D printing technology, it is impossible to realize the printing crystal form control conversion problem of polycrystalline polymers. Therefore, by placing the material under high voltage conditions, the molten polymer can be controlled with a high ratio of single crystal form conversion. [0003] There are many ways to control the crystal form transformation of molten polymers, such as annealing, cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/106B29C64/307B33Y10/00B33Y40/00
CPCB33Y10/00B33Y40/00
Inventor 王云明俞博扬周华民黄志高李德群张云余兆函
Owner HUAZHONG UNIV OF SCI & TECH
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