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Modification technology of 3D printing-molded powder material

A powder material and 3D printing technology, which is applied in the field of modification technology, can solve the problems that affect the printing accuracy of the mold, the clogging of the printing head, and easy dusting, etc., and achieve the effects of shortening the hardening time, improving the printing accuracy, and good rolling properties

Inactive Publication Date: 2016-05-04
HEILONGJIANG HEIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small particles can provide strong van der Waals force between each other, but the rolling property is poor, and it is easy to raise dust during the printing process, resulting in blockage of the print head; large particles have good rolling property, but will affect the printing accuracy of the mold ;Secondly, it is necessary to select materials that can be rapidly formed and have better forming properties, such as quartz sand, ceramic powder, gypsum powder, polymer powder (such as polymethyl methacrylate, polyoxymethylene, polystyrene, polyethylene, paraffin wax, etc.) etc.), metal oxide powder (such as aluminum oxide, etc.) and starch as the main filler of the material, and the purpose of rapid prototyping can be achieved by selecting the binder that is matched with it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Experimental purpose and method:

[0018] Objective: To select the appropriate modifier. Method: Select 2g stearic acid, 2g sodium lauryl sulfate, 2g5040B, 2g coagulant accelerator 200, 2g coagulant accelerator 600, 2g coagulant accelerator 2000 and 2g coagulant accelerator 6000 and mix with 20g calcium sulfate dihydrate, And put it in 120g of absolute ethanol, stir at room temperature for 1 hour, then bake at 150°C for 2 hours, and compare it with the calcium sulfate dihydrate powder that was directly dried at 150°C for 2 hours, and take the powder to test its smallest particle size. diameter, initial hardening time and powder rollability.

[0019] Experimental results: By comparing the powders to test the minimum particle size, initial hardening time and powder rollability, it is found that the accelerator modifier can not only act as a good dispersant, but also greatly improve the rapid hardening of the powder. It can reach a certain hardness in a short time, while...

Embodiment 2

[0021] Experimental purpose and method:

[0022] Objective: To select the appropriate solvent. Method: Mix 2g accelerator modifier 600 with 20g calcium sulfate dihydrate, distribute in 120g absolute ethanol, 120g butyl acetate, and 120g acetone, stir at room temperature for 1 hour, and then bake at 150°C for 2 hours , and compared with the calcium sulfate dihydrate powder directly dried at 150°C for 2 hours, the powder was taken to test its minimum particle size, initial hardening time and powder rollability.

[0023] Experimental results: By comparing the powder to test the minimum particle size, initial hardening time and powder rollability, it is concluded that as long as the solvent can dissolve the accelerator modifier well and does not affect the stirring process, considering toxicity, cost and rapid Hardening and other factors, choose ethyl acetate, which is not too polar, not easy to form hydrogen bonds, and cheaper in price, as the dispersion medium for powder modifi...

Embodiment 3

[0025] Experimental purpose and method:

[0026] Objective: To select the appropriate amount of solvent. Method: Take 2g coagulation accelerator modifier 600 and mix 20g calcium sulfate dihydrate, and place them in 50g ethyl acetate, 70g ethyl acetate, 100g ethyl acetate, 150g ethyl acetate solvent respectively, stir at room temperature for 1 hour, then Bake at 150°C for 2 hours, and take the powder to test its initial hardening time.

[0027] Experimental results: By comparing the powder to test the initial hardening time, it is concluded that the hardening time does not change with the amount of solvent;

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PUM

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Abstract

The invention belongs to the technical field of powder material modification and discloses a modification technology of a 3D printing-molded powder material. Through calcium sulfate powder modification, calcium sulfate powder hardening time is greatly reduced and fast hardening demands in 3D printing molding are satisfied. Through use of a dispersant, relative independence of powder is kept so that good rolling effects are obtained and the problem of printing head blocking caused by easy dust rising in printing is solved and thus a mold printing precision is improved.

Description

technical field [0001] The invention relates, in particular, to a modification process for molding powder materials in 3D printing technology. Background technique [0002] The 3D printing (Three Dimension Printing) process uses three-dimensional molding technology, using powder materials such as ceramic powder, metal powder, gypsum powder, and some hot-melt or light-curing resins, etc., and printing the cross-section of the part on the material powder with a binder through the nozzle. , or the molding resin is sprayed out layer by layer, cured and bonded separately, and the molding process is to overlap and bond each two-dimensional cross-section to form a three-dimensional entity. It has high speed and is suitable for manufacturing parts of complex shapes. It can be used to manufacture parts of composite materials or heterogeneous materials. It can manufacture small batches of parts and parts of complex shapes without pollution. 3DP is one of the hotspots of rapid prototy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/16C04B24/04
CPCC04B40/0042C04B11/00C04B24/085C04B24/16C04B2103/12C04B24/045C04B24/02C04B24/008C04B40/0046
Inventor 陈明月苏桂明姜海健马宇良方雪刘晓东崔向红
Owner HEILONGJIANG HEIKE TECH CO LTD
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