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3D printing silica gel and printing method thereof

A 3D printing and silica gel technology, applied in the field of 3D printing, can solve problems such as clogged nozzles, achieve printing accuracy, improve appearance, and controllable fineness

Inactive Publication Date: 2018-02-09
HUIZHOU RES INST OF SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a 3D printing silica gel and its printing method. The material has high transparency, good plasticity, good fluidity, good self-leveling property, good storage stability, and controllable curing. , environmental protection and non-toxic characteristics, good printing stability, controllable fineness, good elasticity and high strength after heat curing, and not only solves the problem of clogged nozzles, but also retains the performance of silicone

Method used

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  • 3D printing silica gel and printing method thereof
  • 3D printing silica gel and printing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: According to methyl vinyl silicone oil (viscosity of 10W mpa s) 100Kg, methyl polyhydrogen silicone oil (viscosity of 5mpa s) 2Kg, hydrophilic calcium carbonate 1Kg, chloroplatinic acid divinyltetramethyl di Siloxane 0.0001Kg, S-containing organic matter 0.00001Kg Weigh the raw materials of each component, mix each component mechanically, and defoam in a vacuum of -0.07MPa;

[0028] Step 2: Load the 3D printing silica gel that has undergone vacuum defoaming into the printing cylinder, and perform defoaming in a vacuum of -0.07MPa;

[0029] Step 3: Install the piston in the printing barrel, and perform defoaming in a vacuum of -0.07MPa, and age for 0.5h after defoaming;

[0030] Step 4: Install the printing cylinder with the piston on the 3D printer, and input the 3D graphics into the 3D printer for printing after slicing. The inner diameter of the nozzle is 0.1mm, and the printing pressure is 0.1MPa;

[0031] Step 5: After the printing is completed, heat-cure t...

Embodiment 2

[0033] Step 1: According to methyl phenyl vinyl silicone oil (viscosity of 50mpa s) 100Kg, terminal hydrogen-containing silicone oil (viscosity of 200mpa s) 100Kg, MQ resin 50Kg, chloroplatinic acid-diethyl phthalate 0.1 Kg, 0.1Kg of ionic compound containing Sn, 1 part of toner Weigh the raw materials of each component, mix each component mechanically, and defoam in a vacuum of -0.08MPa;

[0034] Step 2: Load the 3D printing silica gel that has undergone vacuum defoaming into the printing cylinder, and perform defoaming in a vacuum of -0.08MPa;

[0035] Step 3: Install the piston in the printing barrel, and defoam in a vacuum of -0.08MPa, and age for 72 hours after defoaming;

[0036] Step 4: Install the printing cylinder with the piston on the 3D printer, and input the 3D graphics into the 3D printer for printing after slicing. The inner diameter of the nozzle is 3mm, and the printing pressure is 0.6MPa;

[0037] Step 5: After the printing is completed, heat-cure the printe...

Embodiment 3

[0039] Step 1: According to methyl vinyl silicone oil (viscosity of 5000mpa s) 100Kg, methyl hydrogen-containing silicone oil 4Kg (viscosity of 50mpa s), lipophilic fumed silica 7.5Kg, chloroplatinic acid 0.0015Kg, ethynyl ring Hexanol 0.0008Kg Weigh the raw materials of each component, mix each component mechanically, and defoam in a vacuum of -0.09MPa;

[0040] Step 2: Load the 3D printing silica gel that has undergone vacuum defoaming into the printing cylinder, and perform defoaming in a vacuum of -0.09MPa;

[0041] Step 3: Install the piston in the printing barrel, and perform defoaming in a vacuum of -0.09MPa, and age for 48 hours after defoaming;

[0042] Step 4: Install the printing cylinder with the piston on the direct-writing 3D printer, and input the three-dimensional graphics into the direct-writing 3D printer for printing after slicing. The inner diameter of the nozzle is 0.9mm, and the printing pressure is 0.35MPa;

[0043] Step 5: After the printing is complet...

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Abstract

The invention discloses 3D printing silica gel and a printing method thereof. The 3D printing silica gel is prepared from, by weight, 100 parts of vinyl silicone oil, 2-100 parts of hydrogen-containing silicone oil, 1-50 parts of filler, 0.0001-0.1 part of catalyst, 0.00001-0.1 part of inhibitor and 0-1 part of toner. The plasticity, liquidity, self-levelling property, storage stability and curingcontrollability of the 3D printing silica gel are strictly controlled, and a silica gel product good in printing stability, controllable in fineness, good in elasticity after thermo-curing and high in strength is obtained. In addition, it is ensured that the viscosity of the silica gel does not change in the printing process, the spray nozzle blockage problem is not caused, and improvement of theprinting precision is also facilitated. The good self-levelling property is endowed for the 3D printing silica gel, step marks and prints left after spray nozzle movements are eliminated, and productappearance is improved. Photosensitive components and other components are not introduced, and the silica gel is friendly to the environment and can be applied to the fields, having higher requirements, such as foods and medical treatment after 3D printing.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing silica gel and a printing method thereof. Background technique [0002] Addition-type silica gel has the characteristics of good high and low temperature performance, low stress, good shock resistance, good compression set, superior electrical properties, excellent weather resistance, low surface tension, environmental friendliness, and non-flammability. It can be used in food, medical, sealing, Automobiles, electronic appliances and other fields. In order to meet the needs of more fields and realize the rapid prototyping and complex manufacturing of silica gel, researchers strive to apply silica gel to 3D printing. However, silica gel is a thermosetting material, and it is difficult to use temperature changes to hot-melt extrude and Cool and shape. [0003] Fripp Design in Sheffield, U.K. uses the needle-type extrusion head of a 3D printer to spray quantitative catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L83/04C08K3/26C08K3/36C08K3/30B29C64/106B29C64/307B33Y10/00B33Y40/00B33Y70/00
CPCB33Y10/00B33Y40/00B33Y70/00C08K2003/265C08K2003/3045C08L83/04C08L2205/025C08L2205/03C08K3/26C08K3/36C08K3/30
Inventor 纪红兵曾永斌付鑫
Owner HUIZHOU RES INST OF SUN YAT SEN UNIV
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