Processing method for improving performance of 3D printed polymer material component

A polymer material and 3D printing technology, applied in the field of processing to improve the performance of 3D printed polymer material parts, to achieve the effects of improved mechanical properties, improved wear resistance, and smaller grain size

Active Publication Date: 2014-11-05
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no literature reports on the use of cryogenic treatment to improve the mechanical properties of 3D printed polymer materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Secondary cryogenic treatment Put the naturally cooled 3D printed polymer material parts into the cryogenic device again, control the cooling rate to 4.5-7.5°C / min, the cooling temperature is -155--205°C, and keep warm for 16-22 hours.

[0022] Tempering treatment is to raise the metal parts after the second cryogenic treatment to room temperature at a heating rate of 8-16°C / min, and then perform tempering treatment within a time interval of less than 25 minutes. The heating temperature during tempering treatment is set at 150- 180°C, keep warm for 2 to 5 hours, and finally place the 3D printed metal parts in the air, and cool to room temperature naturally.

[0023] Put the 3D printed parts using polyvinyl alcohol (PVA) into the cryogenic treatment device, cool down to -196°C and keep the temperature constant for 18 hours. After the cryogenic treatment, place the parts in the air, and naturally cool to room temperature. 0.5°C / min.

[0024] Put the naturally cooled meta...

Embodiment 2

[0028] The 3D printed parts made of nylon (PA) were placed in a cryogenic treatment device with liquid nitrogen, and the temperature was lowered from room temperature to -185°C at 10°C / min and kept at a constant temperature for 12 hours.

[0029] Then the polymer material is placed in the air, naturally cooled and warmed up to room temperature.

[0030] Put the naturally cooled metal parts into the cryogenic device again, control the cooling rate at 6°C / min, the cooling temperature at -185°C, and keep warm for 18h.

[0031] Raise the metal parts after the secondary cryogenic treatment to room temperature at a heating rate of 13°C / min, and then perform tempering treatment within a time interval of less than 25 minutes. Set the heating temperature during tempering treatment to between 168°C and keep warm for 3.5 hours , and finally place the 3D printed metal parts in the air and cool down to room temperature naturally.

[0032] Based on this embodiment, the friction resistance ...

Embodiment 3

[0034] Put the acrylonitrile-butadiene-styrene copolymer (ABS) into the cryogenic treatment equipment, cool down to -190°C at a rate of 0.5°C / min, keep the temperature constant for 23 hours, and then cool naturally to room temperature.

[0035] Put the naturally cooled metal parts into the cryogenic device again, control the cooling rate to 7.5°C / min, the cooling temperature is -205°C, and keep warm for 22h.

[0036] Raise the metal parts after the secondary cryogenic treatment to room temperature at a heating rate of 16°C / min, and then perform tempering treatment within a time interval of less than 25 minutes. Set the heating temperature during tempering treatment to between 180°C and keep it warm for 5 hours. Finally, the 3D printed metal parts are placed in the air and cooled to room temperature naturally.

[0037] Based on the treated ABS in this embodiment, it can be seen from the tensile test and bending test that its tensile strength and bending resistance have been inc...

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PUM

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Abstract

The invention discloses a processing method for improving performance of a 3D printed polymer material component. The processing method comprises the steps of carrying out a primary cryogenic treatment on the 3D printed polymer material component; cooling naturally after the primary cryogenic treatment is finished; carrying out secondary cryogenic treatment after natural cooling; and continuously carrying out annealing treatment after the secondary cryogenic treatment. The processing method is carried out at an ultralow temperature; molecular motion is very slow; internal energy in the whole molecular chain is significantly increased; a microstructure of the polymer becomes dense and ordered; and the whole material structure becomes more balanced, so that mechanical property of the material is greatly improved. Due to the cryogenic treatment on the polymer material, polymer chains in the material are arranged in order; grain size becomes small; and degree of crystallinity is increased, so that the wear resistance, bending resistance and tensile strength of the polymer material are greatly improved. The mechanical performances of the processed 3D printed polymer material component are enhanced obviously, so that the processed 3D printed polymer material component can be applied in industrial production more widely.

Description

technical field [0001] The invention relates to a processing method for improving the performance of polymer parts, in particular to a processing method for improving the performance of 3D printing polymer parts. Background technique [0002] 3D printing technology is rapidly changing traditional production methods and lifestyles. As a strategic emerging industry, the United States, Germany and other developed countries attach great importance to and actively promote this technology. Many experts believe that the new manufacturing technology represented by 3D printing technology characterized by digitalization, networking, personalization and customization will promote the third industrial revolution. The source of 3D printing technology can be traced back to rapid prototyping technology. Since the development of 3D computer-aided design (3DCAD), people hope to directly convert design into physical objects conveniently. The 3D printing technology is to divide the 3DCAD mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C71/02C21D6/04
Inventor 倪红军吕毅刘红梅吴成群徐元彬朱昱黄明宇汪兴兴朱爱东张欣
Owner NANTONG UNIVERSITY
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