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A 3D printing light-curing material and its underwater curing post-treatment process

A light-curing material and 3D printing technology, applied in the field of printing, can solve the problems of the overall performance of material workpieces, poor stain resistance, low contour curing energy, etc., to improve poor curing and rough contours, improve light aging resistance, and improve the overall The effect of operating efficiency

Active Publication Date: 2022-03-22
WUXI CITY CASHEW NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly because domestic 3D printing light-curing materials have slow curing, poor overall performance, large shrinkage, strong odor, low surface quality, poor aging resistance, poor stain resistance, unstable performance and largely unable to meet practical applications. and many other issues
Moreover, the curing of DLP equipment also has certain defects. During the printing and curing process of the Z-axis contour surface and the overall side of the material, due to the low contour curing energy and the high printing speed, it is easy to have poor curing, rough contours and easy scratches on the side. , thus affecting the overall performance of the formed material workpiece

Method used

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  • A 3D printing light-curing material and its underwater curing post-treatment process
  • A 3D printing light-curing material and its underwater curing post-treatment process
  • A 3D printing light-curing material and its underwater curing post-treatment process

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Experimental program
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Effect test

Embodiment 1

[0032]

[0033]

[0034] The above-mentioned mixture system is first cured and shaped by a 3D printing DLP device with UVA 385nm band, and then undergoes an underwater curing post-treatment process. Specifically, put the printed material workpiece into a sealed rotary LED-UV secondary underwater curing and ultrasonic thermal cleaning machine, and perform a sealed underwater secondary exposure and curing post-treatment on the same machine for a certain period of time. And ultrasonic heat cleaning treatment. Among them, the secondary curing light source is in the 355nm wave band, the internal box wall of the curing machine is a BMC material car lamp grade total reflection mirror, the lamp source current is 3A, the variable current control power is 300W, the curing time is 5min, the water used is deionized water, ultrasonic The power of the generator is 100W, the cleaning time is 9 minutes, and the heating temperature is 60 degrees.

Embodiment 2

[0036]

[0037]

[0038]The above-mentioned mixture system is first cured and shaped by a 3D printing DLP device with UVA 385nm band, and then undergoes an underwater curing post-treatment process. Specifically, put the printed material workpiece into a sealed rotary LED-UV secondary underwater curing and ultrasonic thermal cleaning machine, and perform a sealed underwater secondary exposure and curing post-treatment on the same machine for a certain period of time. And ultrasonic heat cleaning treatment. Among them, the secondary curing light source is 355nm wave band, the internal box wall of the curing machine is a BMC material car lamp grade total reflection mirror, the lamp source current is 1A, the variable current control power is 100W, the curing time is 10min, the water used is deionized water, ultrasonic The power of the generator is 300W, the cleaning time is 10 minutes, and the heating temperature is 60 degrees.

Embodiment 3

[0040]

[0041] The above-mentioned mixture system is first cured and formed by 3D printing DLP equipment in the ultraviolet UVA385nm band, and then the underwater curing post-treatment process is carried out. Specifically, put the printed material workpiece into a sealed rotary LED-UV secondary underwater curing and ultrasonic thermal cleaning machine, and perform a sealed underwater secondary exposure and curing post-treatment on the same machine for a certain period of time. And ultrasonic heat cleaning treatment. Among them, the secondary curing light source is in the 385nm band, the internal box wall of the curing machine is a BMC material car lamp grade total reflection mirror, the lamp source current is 4A, the variable current control power is 400W, the curing time is 3min, the water used is tap water, and the ultrasonic generator The power is 400W, the cleaning time is 8 minutes, and the heating temperature is 60 degrees.

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Abstract

The invention discloses a 3D printing light-curing material and its underwater curing post-treatment process. The main components of the light-curing material are calculated by weight percentage, consisting of 20-50% of UV-curable nano-organic-inorganic silicon hybrid resin, 5-25% of UV-curable self-repairing resin, 0.5-20% of fluorine-modified resin, and 10% of monomer diluent ~40%, photoinitiator 0.1~5%, pigment 0.1~1%, filler 0.1‑5%, auxiliary agent 0.1~3%. The 3D printing light-curing material of the present invention is first cured and formed by a 3D printing DLP device with ultraviolet light UVA 385nm band, and then undergoes an underwater curing post-treatment process. The tensile strength of the 3D printing light-cured material obtained by the process of the present invention is 68-80Mpa, the bending strength is 53-61Mpa, the scratch resistance is good, the fine scratches can be quickly repaired without leaving traces, and the surface finish level is ▽10- ▽11, the dimensional change is within 0.10mm under long-term storage, and the light aging resistance is up to 300h.

Description

technical field [0001] The invention relates to the field of printing, in particular to a 3D printing photocurable material and its underwater curing post-treatment process. Background technique [0002] 3D printing technology has now entered an era of rapid development. 3D printing has been endowed with the background of the "third industrial revolution". Key elements. Digital Light Processing (DLP) technology was first developed by Texas Instruments. It mainly uses a projector to solidify photosensitive polymer liquid layer by layer to create 3D printed objects. It has now developed into another new fast molding technology. One of the key technologies of the 3D printing rapid prototyping method based on DLP technology is light-curing materials. The research on 3D printing light-curing materials abroad is earlier, and it occupies the main market in China. Domestic DLP manufacturers and service printing manufacturers are at a relatively low level. In actual material selec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08K3/36C08L75/14C08L91/06C08L3/06
CPCC08F283/008C08L75/14C08K2201/011C08L2205/025C08L91/06C08L3/06C08K3/36
Inventor 覃章友雷晓航
Owner WUXI CITY CASHEW NEW MATERIALS CO LTD
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