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Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery

A technology of minimally invasive surgery and endoscopy, applied in the direction of trocars, etc., can solve the problems of numerous procedures, high production cost, low yield rate, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2010-08-18
湖南英捷高科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The head of the biopsy forceps has the following characteristics: the weight of the part is only 0.02-0.04 grams, there are notches, horizontal holes, blind holes, multi-threads and concave tables, especially the thickness of the working edge is less than 0.2mm; due to the limitation of the operating space , the size of the forceps head must be controlled below the size range of 3mm. In order to meet the requirements of different operations, its three-dimensional geometric shapes are various, but they are all relatively complicated or very complicated. In the past, they were manufactured by mechanical processing and electrical processing, and there were many processes. , the finished product rate is low, and the production cost is high

Method used

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  • Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery
  • Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery
  • Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery

Examples

Experimental program
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preparation example Construction

[0008] A. preparation of binder: by weight percentage, get polyethylene glycol 10-15%, vegetable oil 15-30%, polyethylene 10-15%, polypropylene 5-20%, paraffin 25-45%, put blade In a type mixer, mix for 1 hour at a temperature of 140°C-160°C;

[0009] B. Ingredients: Weigh the stainless steel powder and binder according to the mass ratio of 80-95:20-5%, mix them in a planetary mixer at a temperature of 150-220°C for 1.5 hours, and make them after cooling and crushing into feeding.

[0010] C. Injection molding: put the prepared feed into BOY50T injection molding machine, injection temperature is 120-165°C, injection pressure is 60-120Mpa, mold temperature is 30-60°C, and the blank is formed by injection.

[0011] D. Degreasing: first place the blank in a dichloromethane solvent to dissolve the paraffin and vegetable oil components; then put the dried blank into a vacuum degreasing furnace, under the protection of hydrogen or argon, at 4 ° C / min heating to 180°C, holding for...

example 1

[0014] Example 1: Stainless steel powder and binder are mixed according to the mass ratio of 85:15, mixed at 180°C for 1.5 hours, injection temperature at 145°C, injection pressure at 80Mpa, mold temperature at 55°C, and sintered at 1375°C for 90 minutes after degreasing.

example 2

[0015] Example 2: Stainless steel powder and binder are proportioned in a mass ratio of 90:10, mixed at 180°C for 1.5 hours, injection temperature at 145°C, injection pressure at 90Mpa, mold temperature at 55°C, and sintered at 1375°C for 90 minutes after degreasing.

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Abstract

The invention relates to a method for processing a head of a pair of biopsy forceps, which adopts a metal injection forming technique and leads stainless steel powder to be mixed with binding agent; a product green body is formed by injection of an injection molder; and the head of the biopsy forceps can be prepared by degreasing and sintering. The head of the biopsy forceps can be formed at one step, needs a little post processing, and greatly reduces the cost. The product density reaches up to 7.6g / cm<3>, and the size accuracy reaches + / -0.3% of the size of the product.

Description

1. Technical field [0001] The invention relates to a processing method for making the pincer head of an endoscope living body sampling forceps (hereinafter referred to as biopsy forceps) for minimally invasive surgery by metal injection molding technology. 2. Background technology [0002] Biopsy forceps are widely used in various endoscopic operations, including laparoscopy, thoracoscopy, discoscopy, arthroscopy, duodenoscopy, gastroscopy, colonoscopy, choledochoscopy, cystoscopy, sinusoscopy, hysteroscopy, etc. . The biopsy forceps head is one of the most critical working parts. The head of the biopsy forceps has the following characteristics: the weight of the part is only 0.02-0.04 grams, there are notches, horizontal holes, blind holes, multi-threads and concave tables, especially the thickness of the working edge is less than 0.2mm; due to the limitation of the operating space , the size of the forceps head must be controlled below the size range of 3mm. In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10A61B10/02
Inventor 李益民邓忠勇唐嵘何浩胡幼华
Owner 湖南英捷高科技有限责任公司
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