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Binder composition applied to 3D printing and using method thereof

A 3D printing and composition technology, applied in the field of 3D printing adhesive composition, can solve problems such as low bonding strength and poor mechanical properties of green bodies, and achieve good mechanical properties, save production costs, and good bonding effect Effect

Pending Publication Date: 2021-02-26
JIHUA LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the binder solution mostly uses low molecular weight polymers, resulting in low bond strength and poor mechanical properties of the green body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A binder composition applied to metal powder 3D printing, the composition of the binder composition includes: 5% by weight of polyethyleneimine (weight average molecular weight about 50000g / mol), 1% by weight of glycerol Alcohol, 0.2% by weight of surfynol 104PG50 and 93.8% by weight of water.

[0027] A method for using a binder composition applied to 3D printing, comprising the following steps:

[0028] Mix the above components uniformly at 40°C to obtain a binder solution, the viscosity of the binder solution measured at room temperature is 17.6 mPa·s, and the surface tension is 67 mN·m -1 .

[0029] The binder composition configured above was transferred to the jetting device of the 3DP printing equipment for 3D printing of 316L stainless steel powder, wherein the 316L stainless steel powder was a spherical powder of 10-15 microns (average particle size 12.5 microns). After the printing is completed, keep the printed part in the powder bed, put the powder bed at 1...

Embodiment 2

[0032] A binder composition applied to ceramic powder 3D printing, the composition of the binder composition comprises: 15% by weight of polyethyleneimine (weight average molecular weight about 9000g / mol), 5% by weight of glycerol Alcohol, 0.2% by weight surfynol 104PG50, 40% by weight water and 39.8% by weight isopropanol.

[0033] A method for using a binder composition applied to 3D printing, comprising the following steps:

[0034] Mix the above components uniformly at 25°C to obtain a binder solution, the viscosity of the binder solution measured at room temperature is 7.8 mPa·s, and the surface tension is 34 mN·m -1 .

[0035] The adhesive composition configured above is transferred to the injection device of the 3DP printing equipment for 3D printing of zirconia powder, wherein the zirconia powder is a spherical powder of 10-50 microns. The spherical powder includes two powders with an average particle size of 10 microns and 50 microns, which are mixed according to a ...

Embodiment 3

[0038] A binder composition applied to 3D printing of metal-ceramic composite powder, the composition of the binder composition includes: 15% by weight of polyvinyl alcohol (weight average molecular weight about 9000g / mol), 2% by weight of ethyl alcohol Glycol, 1% by weight glycol ether alcohol, 3% by weight 2-ethoxyethanol, 79% by weight water.

[0039] A method for using a binder composition applied to 3D printing, comprising the following steps:

[0040] Mix the above components uniformly at 25°C to obtain a binder solution, the viscosity of the binder solution measured at room temperature is 6 mPa·s, and the surface tension is 55 mN·m -1 .

[0041] The binder composition configured above is transferred to the jetting device of the 3DP printing equipment for 3D printing of WC-20%Co composite powder, wherein the WC-20%Co composite powder is a spherical powder of 10-50 microns. The spherical powder includes two powders with an average particle size of 10 microns and 50 micron...

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Abstract

The invention discloses a binder composition applied to 3D printing and a using method thereof. The binder composition comprises the following components in percentage by weight: 5-15% of a polymer, 1-5% of a stabilizer, 0.2-3% of a surfactant and 77-93.8% of a solvent. The using method of the binder composition comprises the step of transferring the binder composition to a spraying device of 3DPprinting equipment for powder 3D printing. The binder composition disclosed by the invention has a good binding effect on metal powder, ceramic powder and metal ceramic composite powder, and a printedgreen body material has good mechanical properties. According to the invention, rapid manufacturing of complex-structure products of metal, ceramic and metal ceramic composite materials is achieved,and production cost is saved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a binder composition applied to 3D printing and an application method thereof. Background technique [0002] 3DP (three-dimensional printing) technology, also known as binder jetting (binder jetting) technology, is a method of additive manufacturing. The implementation process of this technology mainly involves first spreading the powdered material or slurry into a layer, and then spraying the adhesive to selectively bond the powdered material in the desired shape in each layer. As printing progresses, each printed layer will bond together to form a bonded powder layer with the desired part geometry. The adhesive can then be cured with heat or other means as needed, and then removed by a process called "skimming". Post-processing, such as sintering or infiltration, is then performed to obtain the desired mechanical properties of the printed product. This techn...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08L29/04C08L39/06C08L33/26C08K5/053C08K5/05C08K5/06C08L83/04B33Y70/10C04B35/632C04B35/634B33Y10/00B33Y40/20B22F10/14B22F10/64
CPCC08L29/04C08L39/06C08K5/053C08K5/06B33Y70/10C04B35/632C04B35/63416C04B35/63444B33Y10/00B33Y40/20
Inventor 孟晓燕邓欣陆腾轩熊义松
Owner JIHUA LAB
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