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A powder 3D printing method based on water-based inorganic binder

An inorganic binder, 3D printing technology, applied in the field of powder 3D printing, can solve the problems of unstable performance, easy decomposition, easy corrosion, etc., to achieve the effect of suitable surface tension, improve product quality, and reduce production costs

Active Publication Date: 2015-08-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The stability of the organic binder is not good. After being affected by the outside world, it is easy to deteriorate and cannot be stored. At the same time, the organic binder is also easy to corrode the delivery pipeline of the binder and the printing nozzle, and it is easy to cause the nozzle to be blocked;
[0006] 2) Parts obtained by powder 3D printing usually need post-processing such as degreasing and calcination. However, due to the unstable performance of traditional organic binders at high temperatures, they are easy to decompose, fail to achieve the bonding effect, and may release toxic gases , so that it is difficult to obtain higher density and strength after degreasing and calcination of parts manufactured by powder 3D printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A powder 3D printing method based on a water-based inorganic binder, comprising the following steps:

[0025] 1) Using 35 parts of deionized water as the binder solvent, adding 64 parts of magnesium chloride (MgCl 2 ) 40% aqueous solution as the binder component, add 1 part of alcohol as a co-volatile agent to improve the drying speed of the binder, do not add colorants to color the binder, and do not add modifiers to modify the binder The inorganic salt solution formed by mixing is used as the binder of the powder 3D printer, and this inorganic salt solution is used as the first reactant of the binder bonding reaction;

[0026] 2) Using the inorganic salt oxide powder corresponding to the chloride used in step 1) as the reaction material, that is, using 15 parts of magnesium oxide (MgO) as the second reactant, and the second reactant is carried out with 85 parts of ceramic powder of the 3D printer. Mixing, without adding flux to adjust the powder properties, the mixed...

Embodiment 2

[0031] A powder 3D printing method based on a water-based inorganic binder, comprising the following steps:

[0032] 1) Using 35 parts of deionized water as the binder solvent, adding 64 parts of zinc chloride (ZnCl 2 ) 40% aqueous solution as the binder component, add 1 part of alcohol as a co-volatile agent to improve the drying speed of the binder, do not add colorants to color the binder, and do not add modifiers to modify the binder The inorganic salt solution formed by mixing is used as the binder of the powder 3D printer, and this inorganic salt solution is used as the first reactant of the binder bonding reaction;

[0033] 2) Adopt the inorganic salt oxide powder corresponding to the chloride used in step 1) as the reaction material, that is, adopt 30 parts of zinc oxide (ZnO) as the second reactant, and the second reactant and 70 parts of diatomite of the 3D printer The powder is mixed, and the properties of the powder are adjusted without adding flux. The mixed powd...

Embodiment 3

[0038] A powder 3D printing method based on a water-based inorganic binder, comprising the following steps:

[0039] 1) Using 45 parts of deionized water as the binder solvent, adding 50 parts of zinc chloride (ZnCl 2 ) 40% aqueous solution as the binder component, add 1 part of alcohol as a co-volatile agent to improve the drying speed of the binder, add 3 parts of inorganic ink as a colorant to color the binder, add 1 part of thickener as an improved Modification of the binder with a neutralizing agent, the inorganic salt solution formed by mixing is used as the binder of the powder 3D printer, and this inorganic salt solution is used as the first reactant of the binder bonding reaction;

[0040]2) Use the inorganic salt oxide powder corresponding to the chloride used in step 1) as the reaction material, that is, use 30 parts of zinc oxide (ZnO) as the second reactant, and the second reactant is carried out with 65 parts of sand powder of the 3D printer. Mix, add 5 parts of...

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PUM

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Abstract

The invention discloses a powder 3D printing method based on a water-based inorganic binder. The powder 3D printing method comprises the following steps: firstly, using deionized water as a binder solvent, adding a chloride salt as a binder component, adding a co-volatile agent, a coloring agent and a modifying agent, and mixing to form an aqueous inorganic salt solution as a binder for a powder 3D printer; secondly, using inorganic oxide powder corresponding to the used chloride as a reactive material, mixing the solid binder with 3D printer raw material powder, and then adding flux to form mixed powder as a material for the powder 3D printing; finally, performing the powder 3D printing by using the binder and the mixed powder. By the powder 3D printing method, rapid powder 3D printing of a product with complex structure is achieved, and the environment friendliness of the manufacturing process is ensured, the production cost is reduced and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of powder 3D printing, in particular to a powder 3D printing method based on a water-based inorganic binder. Background technique [0002] Powder 3D printing (3DP) is a 3D printing method that utilizes droplet jetting, powder bonding technology. Under the control of the computer, according to the information of the current layered cross-section, the nozzle selectively sprays the binder on the pre-laid layer of powder material, so that part of the powder is bonded to form a thin layer of cross-section; After completion, the workbench is lowered by one layer thickness, and the next layer of powder is spread, and then the adhesive is sprayed on the selected area, and the formed thin layer will also be bonded to the formed part at the same time; this process is continuously cycled until the part is processed; Usually the formed parts also need certain post-processing, such as drying, sintering, etc., so as to o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C67/00C04B14/08C04B14/06
Inventor 田小永杨春成李涤尘
Owner XI AN JIAOTONG UNIV
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