CN101804457A - Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery - Google Patents
Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery Download PDFInfo
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- CN101804457A CN101804457A CN200910226648A CN200910226648A CN101804457A CN 101804457 A CN101804457 A CN 101804457A CN 200910226648 A CN200910226648 A CN 200910226648A CN 200910226648 A CN200910226648 A CN 200910226648A CN 101804457 A CN101804457 A CN 101804457A
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- biopsy forceps
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- sintering
- 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
The present invention relates to a kind of with the processing method of metal injection moulding fabrication techniques Minimally Invasive Surgery with endoscope living body sample pickup tongs (hereinafter to be referred as biopsy forceps) binding clip.
2. background technology
Biopsy forceps is widely used in various ESSs, comprises laparoscope, thoracoscope, MED, arthroscope, ERCP, gastroscope, Sigmoidoscope, choledochoscope, cystoscope, nasal sinus mirror, hysteroscope operation etc.The biopsy forceps binding clip is wherein the most key work parts.The biopsy forceps binding clip has following characteristics: this pts wt only for the 0.02-0.04 gram, has the thick not enough 0.2mm of grooving, cross-drilled hole, blind hole, many screw threads and concave station, especially work edge; Because the restriction of operating space, the size of binding clip must be controlled at below the 3mm size range, in order to satisfy the requirement of different operations, its 3 dimensional coil geometry is various, but all be comparatively complicated or very complicated, adopted machining and the manufacturing of electric machining means in the past, operation is various, lumber recovery is low, the production cost height.
3. summary of the invention
Purpose of the present invention is that a kind of processing method of making the biopsy forceps binding clip of metal injection moulding technology will be provided.
Technical scheme of the present invention is: powder of stainless steel and binding agent are mixed into feeding, adopt the injection machine product green compact that are shaped, remove binding agent again, sinter product at last into.
Use the present invention to process the biopsy forceps binding clip, but once-forming only need the processing of a small amount of back, reduces cost greatly.Product density can reach 7.6g/cm
3, dimensional accuracy can reach product size ± 0.3%.
4. description of drawings: Fig. 1 is a structure chart of the present invention, and Fig. 2,3,4 is a die structure dwg
5. the specific embodiment
Below in conjunction with example in detail embodiments of the present invention are described in detail.
A. the preparation of binding agent: by weight percentage, taking polyethylene glycol 10-15%, vegetable oil 15-30%, polyethylene 10-15%, polypropylene 5-20%, paraffin 25-45% puts in the vane type batch mixer, mixes 1 hour under 140 ℃ of-160 ℃ of temperature;
B. prepare burden: in the ratio of mass ratio 80-95: 20-5%, good powder of stainless steel of weighing and binding agent mixed 1.5 hours under 150-220 ℃ of temperature in planetary batch mixer, made feeding after the cooling fragmentation.
C. injection moulding: the feeding that makes is added in the BOY50T injection machine, injection temperature 120-165 ℃, injection pressure 60-120Mpa, 30-60 ℃ of mould temperature, injection moulding goes out blank.
D. degreasing: at first blank is placed dichloromethane solvent, dissolving paraffin and vegetable oil component wherein; Then dried blank is put into the vacuum degreasing stove, under hydrogen or argon shield, be heated to 180 ℃ with 4 ℃/min; be incubated 120 minutes; be heated to 350 ℃ with 4 ℃/min again, be incubated 90 minutes, be heated to 850 ℃ with the speed of 10 ℃/min then and carry out presintering.
E. sintering: the blank after the degreasing is put into vacuum drying oven, logical argon shield, under 1350-1390 ℃ of temperature, sintering 60-120 minute.
Adopt the present invention to prepare the biopsy forceps binding clip:
Example 1: stainless steel powder and binding agent are pressed mass ratio 85: 15 batching, mixed 1.5 hours down in 180 ℃, 145 ℃ of injection temperatures, injection pressure 80Mpa, 55 ℃ of mold temperatures, after the degreasing in 1375 ℃ of sintering 90 minutes.
Example 2: stainless steel powder and binding agent are pressed mass ratio 90: 10 batching, mixed 1.5 hours down in 180 ℃, 145 ℃ of injection temperatures, injection pressure 90Mpa, 55 ℃ of mold temperatures, after the degreasing in 1375 ℃ of sintering 90 minutes.
Example 3: stainless steel powder and binding agent are pressed mass ratio 93: 7 batching, mixed 1.5 hours down in 180 ℃, 150 ℃ of injection temperatures, injection pressure 110Mpa, 55 ℃ of mold temperatures, after the degreasing in 1375 ℃ of sintering 90 minutes.
Claims (5)
1. method for preparing head of endoscope biopsy forceps used for minimally invasive surgery, be that powder of stainless steel is mixed with binding agent, be injected into base through injection machine, degreasing again, sintering, it is characterized in that: described powder of stainless steel obtains by atomization process, described binding agent comprises vegetable oil, thermoplastic polymer and plasticizer.Powder of stainless steel accounts for the 80-95% of gross weight in the described prescription, and binding agent accounts for 5-20%.
2. the processing method of the described biopsy forceps binding clip of claim 1 is characterized in that, described vegetable oil is rapeseed oil, castor oil and peanut oil.
3. the processing method of the described biopsy forceps binding clip of claim 1 is characterized in that, thermoplastic polymer is polyethylene glycol, polyethylene and polypropylene, and plasticizer is a paraffin.
4. the processing method of the described biopsy forceps binding clip of claim 1 is characterized in that, its quality proportioning is thermoplastic polymer 25-50% altogether, plasticizer 25-45%, vegetable oil 15-30%.
5. the processing method of the described biopsy forceps binding clip of claim 1 is characterized in that, described manufacture method is:
A. mixing: as with good binding agent of weighing and powder of stainless steel, in batch mixer, under 160-220 ℃ of temperature, to mix 1.5 hours, make feeding after the cooling fragmentation.
B. injection moulding: the feeding that makes is added in the injection machine, injection temperature 120-165 ℃, injection pressure 80-120Mpa, 40-60 ℃ of mould temperature, injection moulding goes out blank.
C. degreasing: at first blank is placed dichloromethane solvent, dissolving paraffin wax and vegetable oil component wherein; Then dried blank is put into the vacuum degreasing stove, under hydrogen or argon shield, be heated to 180 ℃ with 4 ℃/min speed; be incubated 120 minutes; be heated to 350 ℃ with 4 ℃/min speed again, be incubated 90 minutes, be heated to 850 ℃ with the speed of 10 ℃/min then and carry out presintering.
D. sintering: the blank after the degreasing is put into vacuum drying oven, logical argon shield, under 1350-1390 ℃ of temperature, sintering 60-120 minute.
E. the product behind the sintering is put into polishing machine and polish, obtain final products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910226648A CN101804457A (en) | 2009-12-16 | 2009-12-16 | Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910226648A CN101804457A (en) | 2009-12-16 | 2009-12-16 | Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery |
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| CN101804457A true CN101804457A (en) | 2010-08-18 |
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| CN200910226648A Pending CN101804457A (en) | 2009-12-16 | 2009-12-16 | Method for preparing head of endoscope biopsy forceps used for minimally invasive surgery |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489709A (en) * | 2011-12-07 | 2012-06-13 | 中南大学 | Method for preparing endovascular stents |
| CN102632241A (en) * | 2012-04-27 | 2012-08-15 | 宝得粉末注射成形（常熟）有限公司 | Processing method of sampling forceps of minimally invasive surgeries |
| EP2543458A3 (en) * | 2011-07-07 | 2013-11-20 | Karl Storz Imaging Inc. | Endoscopic camera component manufacturing method |
| CN104550973A (en) * | 2013-10-11 | 2015-04-29 | 浙江一火科技有限公司 | Method for preparing artificial acetabulum cup |
| CN104972128A (en) * | 2014-04-04 | 2015-10-14 | 浙江一火科技有限公司 | Production method of orthodontic forceps |
| CN105312582A (en) * | 2015-10-10 | 2016-02-10 | 自贡金成硬质合金有限公司 | Integral one-time forming process for hard-alloy orthopaedic scalpel blank |
| CN107745117A (en) * | 2017-09-21 | 2018-03-02 | 东莞华晶粉末冶金有限公司 | 310 stainless steelwork and powder of stainless steel injection moulding feedings and preparation method |
| CN107803506A (en) * | 2017-11-29 | 2018-03-16 | 北京科技大学 | A kind of living body forceps head and preparation method thereof |
| CN108856701A (en) * | 2017-05-08 | 2018-11-23 | 东莞华晶粉末冶金有限公司 | Stainless base steel feeding and preparation method thereof, stainless base steel green body and preparation method thereof |
| CN108941574A (en) * | 2018-08-07 | 2018-12-07 | 深圳市铂科新材料股份有限公司 | A kind of metal powder injection molded feeding and preparation method thereof of large-scale part |
| CN109277574A (en) * | 2018-11-23 | 2019-01-29 | 湖南英捷高科技有限责任公司 | A kind of preparation method of compressor of air conditioner swinging block |
| CN109702204A (en) * | 2019-03-07 | 2019-05-03 | 湖南英捷高科技有限责任公司 | A kind of outer diameter is less than or equal to the 420 stainless steel biopsy forceps and its MIM preparation process of 1mm |
| CN112122231A (en) * | 2020-09-04 | 2020-12-25 | 北京中科盛康科技有限公司 | Cleaning device for biopsy forceps |
| CN113500193A (en) * | 2021-07-01 | 2021-10-15 | 湖南博睿特新材料科技有限公司 | Injection molding process for metal handle of medical clamp |
-
2009
- 2009-12-16 CN CN200910226648A patent/CN101804457A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2543458A3 (en) * | 2011-07-07 | 2013-11-20 | Karl Storz Imaging Inc. | Endoscopic camera component manufacturing method |
| US8916090B2 (en) | 2011-07-07 | 2014-12-23 | Karl Storz Imaging, Inc. | Endoscopic camera component manufacturing method |
| US9949617B2 (en) | 2011-07-07 | 2018-04-24 | Karl Storz Imaging, Inc. | Endoscopic camera component manufacturing method |
| CN102489709A (en) * | 2011-12-07 | 2012-06-13 | 中南大学 | Method for preparing endovascular stents |
| CN102632241A (en) * | 2012-04-27 | 2012-08-15 | 宝得粉末注射成形（常熟）有限公司 | Processing method of sampling forceps of minimally invasive surgeries |
| CN104550973A (en) * | 2013-10-11 | 2015-04-29 | 浙江一火科技有限公司 | Method for preparing artificial acetabulum cup |
| CN104972128A (en) * | 2014-04-04 | 2015-10-14 | 浙江一火科技有限公司 | Production method of orthodontic forceps |
| CN105312582A (en) * | 2015-10-10 | 2016-02-10 | 自贡金成硬质合金有限公司 | Integral one-time forming process for hard-alloy orthopaedic scalpel blank |
| CN108856701A (en) * | 2017-05-08 | 2018-11-23 | 东莞华晶粉末冶金有限公司 | Stainless base steel feeding and preparation method thereof, stainless base steel green body and preparation method thereof |
| CN107745117A (en) * | 2017-09-21 | 2018-03-02 | 东莞华晶粉末冶金有限公司 | 310 stainless steelwork and powder of stainless steel injection moulding feedings and preparation method |
| CN107803506A (en) * | 2017-11-29 | 2018-03-16 | 北京科技大学 | A kind of living body forceps head and preparation method thereof |
| CN108941574A (en) * | 2018-08-07 | 2018-12-07 | 深圳市铂科新材料股份有限公司 | A kind of metal powder injection molded feeding and preparation method thereof of large-scale part |
| CN109277574A (en) * | 2018-11-23 | 2019-01-29 | 湖南英捷高科技有限责任公司 | A kind of preparation method of compressor of air conditioner swinging block |
| CN109277574B (en) * | 2018-11-23 | 2021-06-22 | 湖南英捷高科技有限责任公司 | Preparation method of air-conditioning compressor rocker |
| CN109702204A (en) * | 2019-03-07 | 2019-05-03 | 湖南英捷高科技有限责任公司 | A kind of outer diameter is less than or equal to the 420 stainless steel biopsy forceps and its MIM preparation process of 1mm |
| CN112122231A (en) * | 2020-09-04 | 2020-12-25 | 北京中科盛康科技有限公司 | Cleaning device for biopsy forceps |
| CN112122231B (en) * | 2020-09-04 | 2022-08-12 | 北京中科盛康科技有限公司 | Cleaning device for biopsy forceps |
| CN113500193A (en) * | 2021-07-01 | 2021-10-15 | 湖南博睿特新材料科技有限公司 | Injection molding process for metal handle of medical clamp |
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Open date: 20100818 |