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Preparation method of 3D printing material

A 3D printing and nano-silicon nitride technology, which is applied in the field of 3D printing, can solve the problems affecting the quality of rapid prototyping materials or molded parts, low precision and strength of printing materials, and large gaps in powder particle size, which is conducive to industrialization Promotion, low equipment requirements, small particle size effect

Inactive Publication Date: 2016-03-02
SUZHOU SUNSHINE LASER & ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the particle size difference of the powder obtained by the silicon nitride ceramic preparation method used in the prior art for laser sintering is large, and the segregation phenomenon is easy to occur in the process of transportation and powder spreading. The accuracy and strength of materials are relatively low, and the durability is poor, which affects the quality of rapid prototyping materials or molded parts, so a preparation method for 3D printing materials is proposed

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  • Preparation method of 3D printing material

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Effect test

Embodiment 1

[0022] Such as figure 1 Shown, the preparation method of a kind of 3D printing material of the present invention comprises the following steps:

[0023] S1: Add glycidyl etheroxypropyltrimethoxysilane and nano-silicon nitride ceramic powder in sequence to the ethanol solution for stirring and mixing, and keep a constant temperature of 50°C during stirring, wherein the mass percentage of the ethanol is 35%, and the The mass percent of glycidyl etheroxypropyl trimethoxysilane is 25%, and the mass percent of the nano-silicon nitride ceramic powder is 40%. The particle size of the nano-silicon nitride ceramic powder is 0.1-0.4 μm. The ratio of ethanol to water in the ethanol solution is 1:1.5.

[0024] S2: The solution mixed in step S1 is separated by filter filtration and dried in a constant temperature drying oven to obtain a nano-silicon nitride mixture. The constant temperature drying oven was first dried at a constant temperature of 80° C. for 1 hour, and then dried at a c...

Embodiment 2

[0030] The difference between this embodiment and embodiment 1 is as follows:

[0031] S1: Add glycidyl etheroxypropyltrimethoxysilane and nano-silicon nitride ceramic powder in sequence to the ethanol solution for stirring and mixing, and keep a constant temperature of 60°C during stirring, wherein the mass percentage of the ethanol is 50%, and the The mass percent of glycidyl etheroxypropyl trimethoxysilane is 18%, and the mass percent of the nano-silicon nitride ceramic powder is 32%. The particle size of the nano-silicon nitride ceramic powder is 0.1-0.4 μm. The ratio of ethanol to water in the ethanol solution is 1:0.5.

[0032] S3: Add the nano-silicon nitride mixture, epoxy resin, pyromellitic anhydride, and acetone in step S2 to the mixer in turn, and stir and mix thoroughly to obtain the second mixture. The mass percentage of the nano-silicon nitride mixture is 90% %, the mass percentage of the epoxy resin is 3%, the mass percentage of the pyromellitic anhydride is ...

Embodiment 3

[0034] The difference between this embodiment and embodiment 1 is as follows:

[0035] S1: Add glycidyl etheroxypropyltrimethoxysilane and nano-silicon nitride ceramic powder in sequence to the ethanol solution for stirring and mixing, and keep a constant temperature of 55°C during stirring, wherein the mass percentage of the ethanol is 50%, and the The mass percent of glycidyl etheroxypropyl trimethoxysilane is 20%, and the mass percent of the nanometer silicon nitride ceramic powder is 30%. The particle size of the nano-silicon nitride ceramic powder is 0.1-0.4 μm. The ratio of ethanol to water in the ethanol solution is 1:1.

[0036]S3: Add the nano-silicon nitride mixture, epoxy resin, pyromellitic anhydride, and acetone in step S2 to the mixer in turn, and stir and mix thoroughly to obtain the second mixture. The mass percentage of the nano-silicon nitride mixture is 81 %, the mass percentage of the epoxy resin is 3%, the mass percentage of the pyromellitic anhydride is...

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Abstract

The invention discloses a preparation method of a 3D printing material. The method includes: adding glycidyloxypropyl trimethoxysilane and nano silicon nitride ceramic powder into an ethanol solution to conduct stirring mixing, performing filtering by a filter, and conducting drying by a drying oven to obtain a nano silicon nitride mixture, adding the nano silicon nitride mixture, epoxy resin, pyromellitic dianhydride and acetone into the stirrer in order, fully stirring and mixing the substances, then putting the mixture into a double-screw extruder to perform mixing and extrusion granulation, and conducting crushing under the liquid nitrogen cooling condition to obtain nano silicon nitride composite powder. As a 3D printing material particle, the nano silicon nitride composite powder can reach nanoscale, has small particle size and good dispersion uniformity, can shape rapidly and directly under laser sintering equipment without spraying an adhesive, and the shaped product has high precision and strength and good durability. The method provided by the invention has the advantages of simple making process and low equipment requirement, and is in favor of industrial promotion of 3D printing technology.

Description

Technical field: [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a preparation method of a 3D printing material. Background technique: [0002] 3D printing is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. 3D printing is usually achieved using digital technology material printers. It is often used to make models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. 3D laser sintering is a layered manufacturing technology. The premise of this technology is that the three-dimensional data of the object is available, and then the three-dimensional description is converted into a set of slices. Each slice describes the cross-section of the part with a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K3/34B29C67/24B33Y70/00
Inventor 王荣
Owner SUZHOU SUNSHINE LASER & ELECTRONICS TECH CO LTD
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