Post-curing 3D printing method

A 3D printing and molding method technology, applied in the direction of 3D object support structure, additive processing of mixture of solid materials and liquid materials, additive manufacturing, etc., can solve the waste of coated sand, the mixing uniformity of resin particles and raw sand, the use of Stability can not be effectively improved and other problems, to achieve the effect of improving uniformity, eliminating internal adhesive stress, and improving uniformity and reliability

Inactive Publication Date: 2017-03-15
GUANGZHOU OGGI3D ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the above-mentioned preparation method cannot be separated from the traditional coated sand mixing process, the mixing uniformity and service stability between the resin particles and the original sand have not been effectively improved, and the coating will also be caused during the laser sintering process. massive waste of sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Post-curing 3D printing molding method of the present invention comprises the following steps:

[0059] 1) Pretreatment of coated sand

[0060] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 40°C to make the alcoholic solution of phenolic resin reach a saturated state;

[0061] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a in sequence, keep the temperature in the container at 40°C, stir for 5 minutes and then place it still;

[0062] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;

[0063] 2) Printing process

[0064] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the mold...

Embodiment 2

[0074] Post-curing 3D printing molding method of the present invention comprises the following steps:

[0075] 1) Pretreatment of coated sand

[0076] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 60°C to make the alcoholic solution of phenolic resin saturated;

[0077] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a sequentially, keep the temperature in the container at 60°C, stir for 20 minutes and then place it still;

[0078] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;

[0079] 2) Printing process

[0080] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the molding layer an...

Embodiment 3

[0090] Post-curing 3D printing molding method of the present invention comprises the following steps:

[0091] 1) Pretreatment of coated sand

[0092] a) Add anhydrous ethanol and phenolic resin in sequence in a closed container with a stirrer, and keep stirring the mixture at 45°C to make the alcoholic solution of phenolic resin saturated;

[0093] b) In another airtight container with a mixer, add the raw sand and the mixture obtained in step a sequentially, keep the temperature in the container at 45°C, stir for 10 minutes and then place it still;

[0094] c) Cool the container in step b to normal temperature naturally, and open the container. After the ethanol is completely volatilized, the coated sand whose outer surface is wrapped with a phenolic resin film can be obtained;

[0095] 2) Printing process

[0096] d) Model input: input the model drawn by the 3D drawing software into the molding machine, and the molding machine automatically recognizes the molding layer an...

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PUM

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Abstract

The invention discloses a post-curing 3D printing method. The post-curing 3D printing method includes treating the original sand with anhydrous ethanol and phenolic resin to form coated sand, and then spraying the dissolving agent at the time of printing, dissolving the phenolic resin on the coated sand and sticking, molding the coated sand, heating the molded workpiece and curing the molded workpiece for the second time. The post-curing 3D printing method of the present invention can enhance printing stability and workpiece strength, and can reduce the workpiece processing cost and store the printing material for a long time.

Description

technical field [0001] The invention relates to the field of three-dimensional additive manufacturing technology, in particular to a post-curing 3D printing molding method that can realize material post-curing. Background technique [0002] With the continuous development of three-dimensional processing technology, 3D printers, as a kind of three-dimensional additive manufacturing equipment, are widely used in the processing and manufacturing of various components and parts. Compared with traditional CNC processing, 3D printers use additive manufacturing. It has the advantages that traditional subtractive processing methods do not have, such as saving processing raw materials and not needing post-processing of processing waste. In fact, with the continuous improvement of the concept of customization, the emergence of 3D printers has greatly reduced the difficulty of processing many products that used to rely on exquisite handicrafts or traditional manufacturing methods. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/165B29C64/314B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00
Inventor 王晓斌曾源陈国清黄欢强陈天培魏俊杰沈其文吴晓坚周建东
Owner GUANGZHOU OGGI3D ELECTROMECHANICAL
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