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3D printing method for preparing metal artificial bone on basis of slurry direct writing

A 3D printing and artificial bone technology, which is applied in metal processing equipment, additive manufacturing, additive processing, etc., can solve the problems of matching and the inability of the metal artificial bone bracket to adjust the structural porosity and mechanical properties at the same time, so as to promote the elastic modulus Reduce and improve the effect of stress shielding and avoid melting

Active Publication Date: 2021-07-16
吉林大学重庆研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a 3D printing method for preparing metal artificial bone based on slurry direct writing to solve the problem that the existing metal 3D printing method cannot simultaneously adjust the structural porosity and mechanical properties to match the original bone of the human body

Method used

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  • 3D printing method for preparing metal artificial bone on basis of slurry direct writing
  • 3D printing method for preparing metal artificial bone on basis of slurry direct writing
  • 3D printing method for preparing metal artificial bone on basis of slurry direct writing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 The metal powder for printing is iron powder, the binder solvent is dichloromethane DCM, and the polymer is polylactic acid PLA;

[0031] Include the following steps:

[0032] (1) Before mixing the metal slurry, weigh the mass ratio of the polymer to the solvent to be 1:4, dissolve the polymer and the solvent in a sealed container for 6 hours, and prepare a uniform, flowable, and certain viscosity slurry binder;

[0033] (2) Weigh the printing metal powder with a diameter of 5-45 microns and the manganese powder with an irregular particle size of about 5-8 microns as a pore-forming agent according to the volume ratio of 1:0.1, and according to the viscosity of the slurry The mass ratio of the binder to the total metal powder is 1:5, put it into a ball mill and mix it for 30 minutes at a speed of 500r / min to obtain a uniformly mixed metal slurry;

[0034] (3) Put the metal slurry into the barrel 3, and after being clamped by the clamp 4, a stable air pressure...

Embodiment 2

[0042] Example 2 The metal powder for printing is titanium alloy powder, the binder solvent is dichloromethane DCM, and the polymer is polystyrene PS;

[0043] Include the following steps:

[0044] (1) Before mixing the metal slurry, weigh the mass ratio of the polymer to the solvent to be 1:3, dissolve the polymer and the solvent in a sealed container for 12 hours, and prepare a uniform, flowable, and certain viscosity slurry binder;

[0045] (2) Weigh the printing metal powder with a diameter of 30-70 microns and the irregular manganese powder with a particle size of 9-12 microns as a pore-forming agent according to the volume ratio of 1:1, and bond them according to the slurry The mass ratio of agent to total metal powder is 1:4, put it into a ball mill and mix it for 45 minutes at a speed of 800r / min to obtain a uniformly mixed metal slurry;

[0046] (3) Put the metal slurry into the barrel 3, and after being clamped by the clamp 4, a stable air pressure is introduced, a...

Embodiment 3

[0054] Embodiment 3 The printing metal powder is made of stainless steel, the binder solvent is made of water, and the polymer is made of polyvinyl alcohol PVA and polyethylene glycol PEG.

[0055] Include the following steps:

[0056] (1) Before mixing the metal slurry, weigh the mass ratio of the polymer PVA to PEG to be 2:1, and the mass ratio of the polymer to the solvent to be 1:5, and dissolve the polymer and the solvent in a sealed container for 9 hours to prepare Uniform, flowable, and viscous slurry binder;

[0057] (2) Weigh the printing metal powder with a diameter of 70-100 microns and the manganese powder with an irregular particle size of about 12-15 microns as a pore-forming agent according to the volume ratio of 1:2.4, and weigh them according to the slurry The mass ratio of the binder to the total metal powder is 1:3, put it into a ball mill and mix it for 60 minutes at a speed of 200r / min to obtain a uniformly mixed metal slurry;

[0058] (3) Put the metal ...

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Abstract

The invention relates to a 3D printing method for preparing a metal artificial bone on the basis of slurry direct writing, and belongs to a metal 3D printing method in the field of additive manufacturing. Printing metal powder, pore-forming agent manganese powder and a binding agent are evenly mixed and then extruded into lines through a pneumatic printing spray head, a solvent in the binding agent volatilizes, and a three-dimensional structure with a complex shape is formed along with movement of a three-dimensional motion platform. In the later sintering process, the polymer in the binder is pyrolyzed at the temperature of about 300 DEG C, the metal material for preparing the artificial bone is fused together in the environment with the temperature higher than 1000 DEG C, the manganese powder is evaporated under the high-vacuum condition with the temperature lower than 1000 DEG C, and micro-pores are formed in the lines. Structural pores between the micro-pores and the lines are independent, the micro-pores can be adjusted while the structural porosity is kept unchanged, then the mechanical performance of the artificial bone scaffold is adjusted, and the structural porosity and the mechanical performance of the artificial bone scaffold can be kept consistent with an original skeleton of a human body at the same time.

Description

technical field [0001] The invention relates to a 3D printing method for preparing metal artificial bone based on slurry direct writing in the field of additive manufacturing, especially a metal that can be customized, has complex geometric shapes, and can simultaneously adjust the structural porosity and its own mechanical properties. Artificial bone processing method. Background technique [0002] The current mainstream metal additive manufacturing technologies mainly include: powder bed fusion (Powder bed fusion, PBF) and direct energy deposition (Direct energy deposition, DED). Among them, the powder bed fusion technology (PBF) using laser as energy accounts for more than 90% of the metal 3D printing market. Continuously spread powder and sweep layer by layer, repeating until the sample is formed. Direct energy deposition (DED) is to send the powder under the energy beam through the powder feeding device under the protection of gas, and the energy beam melts it, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/18B22F10/38B22F12/50B22F1/00B33Y10/00B33Y70/10B33Y30/00
CPCB22F3/1134B33Y10/00B33Y70/10B33Y30/00B22F1/103B22F1/10Y02P10/25
Inventor 徐超于省楠吴文征刘庆萍任露泉
Owner 吉林大学重庆研究院
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