Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing orthopedic implants

An orthopaedic implant and vegetable oil technology, applied in the field of orthopaedic implant preparation, can solve the problems that traditional processing technology cannot meet the rapidly growing demand, difficult to automate mass production, low utilization rate of raw materials, etc., and achieve excellent biocompatibility and mechanical properties, high utilization rate of raw materials, and the effect of reducing material consumption

Inactive Publication Date: 2017-03-01
THE THIRD XIANGYA HOSPITAL OF CENT SOUTH UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most orthopedic implant products rely on foreign imports, so the price is expensive
Most orthopedic implants have complex three-dimensional structures (such as external grooves, external threads, etc.), and domestic companies usually use traditional machining technology to produce them. The process is cumbersome, the utilization rate of raw materials is low, the production cost is high, and it is difficult to automate mass production.
This will lead to the inability of traditional processing technology to meet the rapidly growing demand

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing orthopedic implants
  • Method for preparing orthopedic implants
  • Method for preparing orthopedic implants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an orthopedic implant of the present invention, which can be used in the spine, includes the following steps:

[0026] (1) Feed preparation: the raw material powder is 316L stainless steel powder with an average particle size of 22μm. The binder is composed of 37% polypropylene, 25% vegetable oil and 38% paraffin (calculated by mass percentage). The powder and the binder are mixed at a mass ratio of 92:8, the resulting mixture is added to a kneader, mixed at 180° C. for 1 hour, cooled and crushed and granulated to obtain a granular feed.

[0027] (2) Injection molding: the granular feed is added to the injection machine and transferred to the mold (see figure 1 with figure 2 ), the injection temperature is 160℃, the injection pressure is 10MPa, and the injection rate is 90% of the system injection rate. The material is fed through the filling port 1 to the mold cavity 2. The mold temperature is controlled at 40°C and the mold pressure is controlled at ...

Embodiment 2

[0032] A method for preparing an orthopedic implant of the present invention, which can be used in the spine, includes the following steps:

[0033] (1) Feed preparation: 17-4PH stainless steel powder is used as the raw material powder, with an average particle size of 22μm. The binder is composed of 40% polypropylene, 20% vegetable oil and 40% paraffin (calculated by mass percentage). The 17-4PH stainless steel powder and the binder are mixed in a mass ratio of 90:10, the resulting mixture is added to a kneader, mixed at 180°C for 1 hour, cooled and crushed and granulated to obtain granular feed.

[0034] (2) Injection molding: the granular feed is added to the injection machine and transferred to the mold (see figure 1 with figure 2 ), the injection temperature is 155℃, the injection pressure is 9MPa, and the injection rate is 80% of the system injection rate. The material is fed through the injection port 1 to the mold cavity 2. The mold temperature is controlled at 35°C and the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing orthopaedic implants. The method comprises the steps that metal powder or ceramic powder is mixed with a binding agent and then is heated, mixed, cooled and granulated to obtain a feed; the feed is injected into a mold under the proper injection temperature, injection pressure and injection rate, the mold temperature ranges from 30 DEG C to 45 DEG C, the pressure of the mold ranges from 2 MPa to 10 MPa, and after pressure maintaining and cooling, a green body is obtained; solvent degreasing and heat degreasing are carried out on the green body successively to obtain a degreasing green body; the degreasing green body is placed in a sintering furnace and is heated to 800 DEG C to 1100 DEG C under the vacuum, and then heated to 1300 DEG C to 1600 DEG C under the argon atmosphere to be sintered for 90 min to 300 min, and the orthopaedic implants are obtained. According to the preparation method, one-time forming and mass production of the orthopaedic implants can be achieved, and the orthopaedic implants are high in raw material utilization rate and low in cost.

Description

Technical field [0001] The invention belongs to the technical field of orthopedic implant preparation, and specifically relates to a method for preparing orthopedic implants by using metal injection molding technology. Background technique [0002] With the continuous development and progress of our society, the spectrum of orthopedic injuries and diseases has shown obvious changes, such as: polio, bone and joint tuberculosis, osteomyelitis and other diseases have been significantly reduced, and the increasing incidence of urban and rural traffic accidents caused trauma Significant increase; at the same time, my country’s population is aging, fractures and osteoarthropathy caused by senile osteoporosis will also increase year by year. Orthopedic implants are medical consumables necessary for surgical treatment of such bone trauma and joint diseases. Factors such as my country’s population getting rid of extreme poverty and the emphasis on quality of life will make my country’s de...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F1/00
Inventor 王国慧朱晒红卢仁伟杨忠臣
Owner THE THIRD XIANGYA HOSPITAL OF CENT SOUTH UNIV