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A high bonding strength electric knife head and its preparation method

A technology combining strength and electrosurgery, applied in the direction of heating surgical instruments, etc., can solve the problems of low interface strength, easy debonding of adhesives, weak connection of insulating heads, etc., to enhance interface strength, avoid interface deformation or even cracking, improve The effect of interfacial bond strength

Active Publication Date: 2021-12-28
NANNING WEIYE ELECTROMECHANICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production process of electric knife with insulating head is mainly to use adhesive to connect the metal rod and ceramic head, but in the actual use process, the high-frequency electric knife head will withstand high temperature above 300 ℃ (the temperature is affected by the length of power-on time) , which will cause the adhesive to be easily debonded, the interface strength is low, and the insulating head may fall off, which will cause serious surgical consequences. Therefore, how to solve the problem of weak connection between 304 stainless steel and zirconia ceramic insulating head is urgently needed.

Method used

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  • A high bonding strength electric knife head and its preparation method
  • A high bonding strength electric knife head and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of powder and binder: take zirconia powder with an average particle size of 30nm as raw material A, and add 20% of the volume of raw material A with zirconia powder with an average particle size of 3 μm to obtain a mixture M, press the mixture M 48% of the total volume is used as binder; 304 stainless steel powder with an average particle size of 40 μm is used as raw material B, and 44% of the total volume of raw material B is used as binder. The main components (mass percentage) of the binder are: polyethylene glycol 24%, polyoxymethylene 63%, polypropylene 7%, ethylene-ethylene acetic acid copolymer 6%, and the sum of the above components is 100%

[0047] (2) Mixing: Under the protection of argon, keep the material temperature at 180°C, respectively mix the mixture M, the raw material B powder and the corresponding binder for 2 hours, and obtain the feeding materials A and B respectively;

[0048] (3) Injection molding: The mold cavity is designed acco...

Embodiment 2

[0052] (1) Preparation of powder and binder: take zirconia powder with an average particle size of 30nm as raw material A, and add 25% of the volume of raw material A with zirconia powder with an average particle size of 3 μm to obtain a mixture M, press the mixture M 48% of the total volume is used as binder; 304 stainless steel powder with an average particle size of 40 μm is used as raw material B, and 44% of the total volume of raw material B is used as binder. The main components (mass percentage) of the binder are: polyethylene glycol 24%, polyoxymethylene 63%, polypropylene 7%, ethylene-ethylene acetic acid copolymer 6%, the sum of the above components is 100%

[0053] (2) Mixing: Under the protection of argon, keep the material temperature at 180°C, respectively mix the mixture M, the raw material B powder and the corresponding binder for 2 hours, and obtain the feeding materials A and B respectively;

[0054] (3) Injection molding: The mold cavity is designed accordin...

Embodiment 3

[0058] (1) Preparation of powder and binder: take zirconia powder with an average particle size of 30nm as raw material A, and add 30% of the volume of raw material A with zirconia powder with an average particle size of 3 μm to obtain a mixture M, press the mixture M 48% of the total volume is used as binder; 304 stainless steel powder with an average particle size of 40 μm is used as raw material B, and 44% of the total volume of raw material B is used as binder. The main components (mass percentage) of the binder are: 24% polyethylene glycol, 63% polyoxymethylene, 7% polypropylene, 6% ethylene-ethylene acetic acid copolymer, and the sum of the above components is 100%

[0059] (2) Mixing: Under the protection of argon, keep the material temperature at 180°C, respectively mix the mixture M, the raw material B powder and the corresponding binder for 2 hours, and obtain the feeding materials A and B respectively;

[0060] (3) Injection molding: The mold cavity is designed acco...

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Abstract

The invention discloses a high bonding strength electric knife head and a preparation method thereof. Nano zirconia powder with a particle size of 10-30 nm is mixed with zirconia powder with a particle size of 3-5 μm to obtain a mixture M, and then Mix material M with binder C to obtain feed A; mix 15-50 μm 304 stainless steel powder with binder D to obtain feed B, and inject feed A and feed B into the electric knife head in sequence Mold cavity, after demoulding, the injection green body is obtained, and the injection green body is degreased and sintered to obtain the electric knife head; the addition amount of the zirconia powder with a particle size of 3-5 μm is a nanometer particle size of 10-30 nm 15-30% of the volume of zirconia powder; through the reasonable ratio of the above raw materials and the control of process parameters, the elements at the interface of 304 stainless steel / zirconia undergo mutual diffusion, and a transition layer with a certain thickness (3-7μm) is obtained. It shows that the two phases form a metallurgical bond, and the interface strength is as high as 120-260MPa.

Description

technical field [0001] The invention relates to a high bonding strength electric knife head and a preparation method thereof, belonging to the technical field of high-frequency electric knife cutting head preparation. Background technique [0002] With the development and progress of science and technology, the concept of "minimally invasive" has penetrated into various fields of surgery. Compared with the traditional open surgical treatment mode, minimally invasive surgery has the advantages of less trauma, less pain, and faster recovery, and has become an important trend in the development of medical technology in the 21st century. Among them, a commonly used medical device is a high-frequency electric knife. High-frequency electric knife is a surgical device that uses high-frequency discharge effect to cut and coagulate human tissue. It was officially used clinically in 1926 and is the earliest surgical electric knife used clinically. The high-frequency electric knife h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F5/00B22F3/24B22F3/10A61B18/12A61B18/14
CPCB22F3/225B22F5/00B22F3/24B22F3/1007A61B18/12A61B18/14B22F2005/001
Inventor 何浩李益民谭文亮刘晨秦健春
Owner NANNING WEIYE ELECTROMECHANICAL TECH CO LTD
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