Frozen ceramic slurry 3D printing mechanism

A technology of 3D printing and ceramic slurry, which is applied in the direction of ceramic forming machines, manufacturing tools, additive processing, etc., can solve the problems of long drying and curing material layer and low processing efficiency, so as to improve processing efficiency, high processing efficiency, The effect of high specific strength

Active Publication Date: 2020-04-28
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LSD, CLS, CLF, etc. use the characteristics of dehydration, drying and hardening of the slurry to improve the stability of 3D printing processing by first heating and drying the whole layer and then laser scanning. However, in order to avoid boiling, shrinkage, cracking and deformation of the material layer caused by high temperature, These methods take a long time to dry and solidify the material layer, and the processing efficiency is not high

Method used

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  • Frozen ceramic slurry 3D printing mechanism
  • Frozen ceramic slurry 3D printing mechanism
  • Frozen ceramic slurry 3D printing mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, see Figure 1-3 , the present invention provides a technical solution: a frozen ceramic slurry 3D printing mechanism, including the following structure:

[0035] The scraping device 1 includes a horizontally moving slider 101 and a scraper 102. The scraper 102 is fastened to the right side of the horizontally moving slider 101 by screws. Contact and cooperate with the upper surface of the workbench 3, and drive the scraping device 1 to slide along the X direction through a stepping motor;

[0036] Scraper 102 comprises feed inlet 102c,, discharge outlet 102a, and feed inlet 102c is circular, and discharge outlet 102a is rectangle, and feed inlet and buffer bin 102b interface are circular and interface is positioned at buffer bin below, and feed outlet The interface 102b with the buffer bin is rectangular and the interface is located above the buffer bin;

[0037] The freezing device 2 includes a freezing liquid box 201, a heater 202, and a pure copper fr...

Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that in operation 3, the laser scanning device 4 is turned on to irradiate the frozen material layer in selected areas, so as to realize the curing of the material layer;

[0049] Repeat operation 1 to operation 3 until the printing is completed, take out the workpiece and wash it in water to remove the frozen slurry and ceramic body in the unscanned area.

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Abstract

The invention discloses a frozen ceramic slurry 3D printing mechanism. The frozen ceramic slurry 3D printing mechanism comprises a scraping device, a freezing device, a working table, a lifting platform, a laser scanning device and a cryogenic box. The scraping device is provided with a scraping knife capable of evenly discharging. The freezing device is provided with a controllable cryogenic freezing plate. The working table is provided with a processing chamber and a waste chamber. A driving device is used for driving the scraping device to lay a layer of slurry on the lifting platform. Unnecessary slurry is recovered by the waste chamber. The freezing device makes contact with a frozen material layer from top to bottom. The laser scanning device selectively irradiates the frozen material layer. The cryogenic box maintains the processing chamber in a cryogenic state to prevent the processed frozen material layer from being melted. Through the frozen ceramic slurry 3D printing mechanism, the material layer can be rapidly solidified to protect a blank against distortion in the layer-by-layer accumulation 3D printing process, and the 3D printing efficiency and processing stability are improved. Besides, a microstructure of a part can be improved by controlling the freezing crystallization process of a solvent in slurry.

Description

technical field [0001] The invention relates to the field of technical additive manufacturing 3D printing, in particular to a frozen ceramic slurry 3D printing mechanism. Background technique [0002] Ceramic materials have the characteristics of high strength, high hardness, wear resistance, corrosion resistance, high temperature resistance, poor plasticity, etc., and poor milling performance. Traditional machining methods have low forming efficiency, poor precision, severe tool wear, and materials are easily broken. At present, the most widely used ceramic forming process is the sintering green body process. The more mature green body forming processes include extrusion molding, calendering molding, injection molding, grouting molding, tape casting, gel injection molding and direct solidification injection molding. Molding, the basic process of these processes includes: first prepare ceramic slurry with powder, water and additives, and then fill the material into the mold ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B33Y30/00
CPCB28B1/001B33Y30/00
Inventor 张耿陈桦曹岩刘宝龙刘峥房亚东
Owner XIAN TECHNOLOGICAL UNIV
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