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3D printing photocuring material and underwater curing after-treatment processing technology thereof

A light-curing material, 3D printing technology, applied in the field of printing, can solve the problems of poor stain resistance, rough outline, poor overall performance, etc., to improve the double bond conversion rate, reduce the degree of yellowing, and improve the overall performance.

Active Publication Date: 2019-09-06
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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  • 3D printing photocuring material and underwater curing after-treatment processing technology thereof
  • 3D printing photocuring material and underwater curing after-treatment processing technology thereof
  • 3D printing photocuring material and underwater curing after-treatment processing technology thereof

Examples

Experimental program
Comparison scheme
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 photocuring material and an underwater curing after-treatment processing technology thereof. The photocuring material is mainly prepared from, by weight, 20-50% of UV-curing nanometer organic-inorganic silicon hybridized resin, 5-25% of UV-curing self-repairing resin, 0.5-20% of fluorine-modified resin, 10-40% of a monomer diluent, 0.1-5% of a photoinitiator,0.1-1% of a pigment, 0.1-5% of a filler and 0.1-3% of an auxiliary agent. The 3D printing photocuring material is firstly subjected to curing forming by 3D printing DLP equipment with the UVA wavebandof 385 nm, and then subjected to the underwater curing after-treatment processing technology. The 3D printing photocuring material obtained by means of the technology has the tensile strength of 68-80 Mpa and the bending strength of 53-61 Mpa, the scratch resistance is excellent, tiny scratches can be quickly repaired, no mark is left, the surface smoothness level is nabla 10-nabla 11, the size change is within the range of 0-0.10 mm after long-time placement, and the light aging resistance reaches 300 h.

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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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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