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Manufacturing method for orthopaedics implant odd-shaped part

A technology for orthopedic implants and special-shaped parts, which is applied in the preparation of special-shaped parts of orthopedic implants, metal powder injection molding technology to prepare special-shaped parts of titanium alloy orthopedic implants, and can solve the problems of difficult automatic batch production, material composition segregation, To solve the problems of high preparation cost, achieve the effect of ensuring density and surface finish, good biomechanical properties, and high utilization rate of raw materials

Active Publication Date: 2015-10-07
长沙瑞泰医学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most titanium alloy orthopedic implant products are produced by: (1) The traditional vacuum self-consumption melting → forging → machining method is produced. This method has a long process flow, many equipments, low yield, and cumbersome subsequent processing, resulting in preparation costs. (2) Casting production, this production process can obtain complex-shaped net-shape or near-net-shape products, but defects such as segregation, porosity, and shrinkage cavities are unavoidable in the casting process, and the material lower performance

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Experimental program
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Effect test

Embodiment 1

[0033] A preparation method of the orthopedic implant special-shaped part of the present invention, the orthopedic implant special-shaped part can be used for the spine, that is, the internal fixation of the spinal column orthopedic implant special-shaped part, the method comprises the following steps:

[0034] (1) Feed preparation: the raw material powder is TC4 titanium alloy atomized powder, with an average particle size of 2 μm, and the binder is composed of 40% polypropylene, 20% vegetable oil, 5% plasticizer and 35% paraffin (by mass percentage count). Mix the binder with TC4 titanium alloy atomized powder, the volume fraction of the binder in the obtained mixture is 43%, and the rest is TC4 titanium alloy atomized powder, put the mixture into the kneader, knead at 120°C for 2 hours, After cooling, it is crushed and granulated to obtain uniform granular feed with good fluidity.

[0035] (2) Injection molding: feed the granular feed into the injection machine and feed it...

Embodiment 2

[0042] A method for preparing the special-shaped orthopedic implant of the present invention, the special-shaped orthopedic implant can be used for the spine, the method comprises the following steps:

[0043] (1) Feed preparation: The raw material powder is TC4 titanium alloy atomized powder, the average particle size is 10 μm, and the binder is composed of 35% polypropylene, 15% vegetable oil, 10% plasticizer, 35% paraffin and 5% micro Crystal wax composition (by mass percentage). Mix the binder with TC4 titanium alloy atomized powder, the volume fraction of the binder in the resulting mixture is 50%, put the mixture into the kneader, knead at 135°C for 1 hour, crush and granulate after cooling, and obtain fluidity Good even granular feeding.

[0044] (2) Injection molding: feed the granular feed into the injection machine and feed it to the mold (see figure 1 and figure 2 ), the injection temperature is 170°C, the injection pressure is 13MPa, and the injection rate is 7...

Embodiment 3

[0050] A method for preparing the special-shaped orthopedic implant of the present invention, the special-shaped orthopedic implant can be used for the spine, the method comprises the following steps:

[0051] (1) Feed preparation: The raw material powder is TC4 titanium alloy atomized powder, with an average particle size of 10 μm, and the binder is composed of 35% polypropylene, 15% vegetable oil, 10% plasticizer and 40% paraffin (by mass percentage count). Mix the binder with TC4 titanium alloy atomized powder, the volume fraction of the binder in the resulting mixture is 48%, put the mixture into the kneader, knead at 120°C for 2 hours, crush and granulate after cooling, and obtain fluidity Good even granular feeding.

[0052] (2) Injection molding: feed the granular feed into the injection machine and feed it to the mold (see figure 1 and figure 2 ) for injection, the injection temperature is 175°C, the injection pressure is 12MPa, and the injection rate is 55% of the...

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Abstract

The invention discloses a manufacturing method for orthopaedics implant odd-shaped parts. The manufacturing method comprises: (1) mixing titanium alloy powders with a binder, heating and mixing, cooling, and pelleting, to obtain a feed material; (2) injecting the feed material to a mould, processing to obtain a green body; (3) performing solvent degreasing and thermal debinding on the green body to obtain a degreased green body; (4) sintering the degreased green body to obtain an orthopaedics implant odd-shaped part. The manufacturing method can realize to form orthopaedics implant odd-shaped parts in complex three-dimensional structure in one time and produce the orthopaedics implant odd-shaped parts in large volume, the odd-shaped parts being high in raw material utilization rate, low in cost, excellent in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of orthopedic implant preparation, and relates to a method for preparing a special-shaped part of an orthopedic implant, in particular to a method for preparing a special-shaped part of a titanium alloy orthopedic implant by metal powder injection molding technology. Background technique [0002] Bone injury is one of the most common diseases in the human body. Human bones can be fractured or worn under the action of external force or disease, so it is necessary to use artificial orthopedic implants for necessary repairs through surgery, or to directly replace the functions of bones. At present, about 3 million people in the world need bone repair due to trauma or disease every year. With the increasing incidence of urban and rural traffic accidents in my country, the number of traumas caused by them has increased significantly. At the same time, my country's aging population and people's emphasis on quality...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F3/115
Inventor 朱晒红王国慧
Owner 长沙瑞泰医学科技有限公司
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