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Method for manufacturing PEEK bone fixation part containing carbon fiber filaments through heat flow die casting

A technology of carbon fiber filaments and bone fixation, which is applied in fixers, fastening devices, internal bone synthesis, etc., can solve the problems of inability to obtain mechanical effects, difficult quality assurance, and complicated processes, so as to avoid step effect and improve mechanical properties. , the effect of dense material

Pending Publication Date: 2020-10-02
沈皆乐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is very complicated and the efficiency is very low. It is basically done by hand, the quality is difficult to guarantee, and good mechanical effects cannot be obtained.

Method used

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  • Method for manufacturing PEEK bone fixation part containing carbon fiber filaments through heat flow die casting
  • Method for manufacturing PEEK bone fixation part containing carbon fiber filaments through heat flow die casting
  • Method for manufacturing PEEK bone fixation part containing carbon fiber filaments through heat flow die casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The implantable bone screw is a columnar structure with a large size in the main load-bearing direction, a certain central symmetry in the outline, and holes, threads, steps and other features in the details. Such as Figure 4 shown. In the axial direction of the bone screw, the carbon fiber filaments in the PEEK material are distributed along the axial direction of the bone screw, which can maximize the axial strength and stiffness. In the tangential direction of the bone screw, especially in the thread direction, the carbon fiber filaments in the PEEK material are wound on the screw spindle along the thread direction (tangential direction). This filament winding method can enhance the resistance of the screw (especially in the thread area). torsional stability and thread strength. In the transition region, the carbon fiber filaments in the PEEK material are distributed in a gradual transition manner, showing a continuous transition of mechanical properties. Such as...

Embodiment 2

[0058] The implant-grade bone plate is a long plate-like structure with a large size in the main load-bearing direction, a certain degree of curvature in the length direction, and a small size outside the main load-bearing direction, with holes, chamfers, and steps and other features. Such as Figure 6 , Figure 7 shown. The implant-grade bone plate is manufactured by hot flow molding process. In the length direction of the bone plate, the carbon fiber filaments in the PEEK material are continuously distributed along the length direction, which can maximize the axial strength and stiffness. At the opening of the bone plate, the carbon fiber filaments in the PEEK material are squeezed by the heat flow of the material during the molding process, and the carbon fiber filaments are formed at the opening to gather along the shape of the opening (the fibers are distributed along the hole), ensuring that the carbon fiber While the filaments are continuous, the distribution directi...

Embodiment 3

[0060] The intervertebral fusion cage has a block structure with a relatively complex internal space structure, and features such as holes, threads, waves, steps, and convex point arrays. Such as Figure 9 shown. The intervertebral fusion cage is manufactured by the heat flow molding process. At the steps and threads of the intervertebral fusion cage, the carbon fiber filaments in the PEEK material are distributed along the steps and thread directions to enhance the torsional stability and stability of the steps and thread areas. area strength. At the opening of the intervertebral fusion device, the carbon fiber filaments are squeezed apart by the heat flow of the material during the molding process, and the carbon fiber filaments are formed at the opening to gather along the shape of the opening (the fibers are distributed along the hole), ensuring that the carbon fiber length While maintaining the continuity of the filaments, the distribution direction of the carbon fiber ...

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Abstract

The invention discloses a method for manufacturing a PEEK bone fixation part containing carbon fiber filaments through heat flow die casting. The method is characterized by successively comprising: animplantation-level PEEK material of a powder shape, a film shape or a fabric shape is heated and melted as a substrate and then mixed with the carbon fiber filaments for curing, a rod material, a sheet material or a tubular precast sectional material is formed to manufacture a precast sectional material which is then cut according to a needed length, the cut precast sectional material is added toa heated lead-in tube, the precast sectional material is softened and ejected to a heated die, the die is full of the material, gradual cooling and complete curing care carried out after a continuoushigh-pressure treatment, die release is carried out, de-burring is carried out, and a finished product is obtained after the product passes an inspection. The heat flow die casting technology is usedfor manufacturing the carbon fiber filaments with a high carbon fiber content to reinforce a PEEK material bone implant. The novel bone implant integrates good mechanical properties, biocompatibilityperformance and imaging features and can be widely applied to the medical field. Through the heat flow die casting technology, multiple novel bone implants can be manufactured.

Description

technical field [0001] The invention relates to a manufacturing method of a medical device, in particular to a method of manufacturing a PEEK bone fixer containing carbon fiber filaments by using a heat flow casting mold. Background technique [0002] In the treatment of bone trauma, stainless steel implants such as implant-grade bone screws, implant-grade bone plates, and intervertebral fusion cages are often used to fix the injured bone. But these implants, made of stainless steel, are limited when patients need MRIs and some patients experience metal allergies. With the development of science and technology, some non-metallic materials have appeared to replace the original metal. Such as the patent CN201711464175.8 long-chain carbon fiber PEEK outer wrapping thermoformed bone fixation plate and its forming method, which includes a carbon fiber filament inner core (1) and a PEEK prepreg layer (2), the carbon fiber filament inner core (1) The outer surface is wrapped with...

Claims

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Application Information

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IPC IPC(8): A61L31/06A61L31/14A61L31/18A61B17/80A61B17/86A61F2/44B29C39/02B29C39/22
CPCA61B17/80A61B17/866A61F2/4455A61L31/06A61L31/14A61L31/18B29C39/02B29C39/22C08L61/16
Inventor 沈皆乐李峰
Owner 沈皆乐
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