CN102115606A - Adhesive and method for preparing metal powder injection molding feedstock from same - Google Patents
Adhesive and method for preparing metal powder injection molding feedstock from same Download PDFInfo
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- CN102115606A CN102115606A CN 201010574711 CN201010574711A CN102115606A CN 102115606 A CN102115606 A CN 102115606A CN 201010574711 CN201010574711 CN 201010574711 CN 201010574711 A CN201010574711 A CN 201010574711A CN 102115606 A CN102115606 A CN 102115606A
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- binding agent
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- injection molding
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Abstract
The invention relates to the field of metal powder injection molding, in particular to an adhesive and a method for preparing metal powder injection molding feedstock from the same. The adhesive comprises olefinic thermoplastic elastomers, carnauba wax, commercial paraffin, high-density polyethylene, polypropylene and stearic acid; and the raw materials are mixed in a ratio, extruded, cooled, crushed, and packaged in vacuum to form the qualified feedstock. The metal powder injection molding feedstock prepared from the adhesive is low in manufacturing cost; in the molding process, a liquid phase and a solid phase are hardly separated, and an injection blank is uniform in density; the debonding efficiency is high; and a sintered blank is high in density. The invention overcomes the defect that the traditional metal powder injection molding feedstock is high in cost, widens the application range, and creates greater economic and social benefits.
Description
Technical field
The present invention relates to the metal powder injection molding field, especially a kind of binding agent and made
The metal powder injection molding preparation method of feeding.
Background technology
Metal powder injection molding (MIM) is a new forming technique that develops rapidly in the world in recent years, it is advantageous that the less component that can make any complicated shape, and each position density of goods is even, excellent performance.An importance of this technology is the selection and the preparation of feeding, and the key of feeding preparation is the preparation of binding agent, so suitable preparation binding agent and feeding are guarantee this Technology realization basic.The ideal feeding will possess the moulding of being easy to, is easy to unsticking, high solids loading (metal-powder takies the volume fraction of material), liquid-solid phase is not easily separated, product blank or unsticking base intensity height, production cost are low, with metal-powder indexs such as chemical reaction do not take place.
Binding agent generally is to form by several compounds are mixed, can be in moulding process as metal-powder mobile carrier, increase the flowability of metal-powder, help to fill complicated mold cavity, high molecular polymer wherein can play the effect of skeleton, to keep the degreasing conformality, minor amounts of additives can increase lubricated and dispersed in powder injection-molded process, helps to obtain the goods of excellent property even structure.
Domestic general feeding binding agent has some self limitation point, as: product strength is low after the unsticking; Unsticking efficient is low; The injection molding liquid-solid phase is easily separated, and injection base density unevenness is even etc.The feeding of external import is better than domestic feeding on use properties, but costs an arm and a leg, and its price is 2～3 times of our similar feeding.
Summary of the invention
The technical problem to be solved in the present invention is: defectives such as time injection base density unevenness is even in order to overcome the moulding of MIM feeding, and unsticking efficient is low provide a kind of binding agent and made metal powder injection molding thereof the preparation method with feeding.
The technical solution adopted for the present invention to solve the technical problems is: a kind of binding agent, it is characterized in that: mixed by olefin hydrocarbons thermoplasticity elastic body, brazil wax, industrial paraffin, high density polyethylene(HDPE), polypropylene and stearic acid and form, each constituent mass per-cent is as follows: thermoplastic elastomer olefines 2.0-6.0%, brazil wax 25-45%, industrial paraffin 10-25%, high density polyethylene(HDPE) 25-35%, polypropylene 3-12% and stearic acid 0.1-0.5%.
In a preferred embodiment of the present invention, described olefin hydrocarbons thermoplasticity elastic body is made up of olefin resin and olefin copolymer rubber.
The invention also discloses the preparation method of the made metal powder injection molding of a kind of binding agent, have the step of being prepared as follows with feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent and metal-powder in the accurate weighing binding agent;
(2) mix: metal-powder is put into kneader mix and preheating, treat to put into binding agent more than the temperature to 150 ℃, fully mediate, mediate and finish the discharging cooling, and be broken into granular;
(3) extrude: use the forcing machine homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack.
In a preferred embodiment of the present invention, described binding agent accounts for feeding mass ratio 6%-9%, and described metal-powder accounts for feeding mass ratio 91%-94%.
In a preferred embodiment of the present invention, the temperature of reaction of described kneading is 170-180 ℃, and the time of kneading is 2-3 hour.
In a preferred embodiment of the present invention, described forcing machine is a twin screw extruder.
The invention has the beneficial effects as follows:
1, the present invention can reduce cost, protect environment, and preparation technology is simple owing to adopt low-cost avirulent starting material.
2, adopt binding agent of the present invention and made metal powder injection molding feeding thereof, the feeding cost of manufacture is low; Liquid-solid phase is not easily separated during moulding, and injection base density is even; Unsticking efficient height; Sintered blank density height.Overcome traditional metal powder injection molding with the high characteristics of feeding cost, enlarged range of application, will create bigger economic benefit and social benefit.
Embodiment
The present invention is described in further detail below in conjunction with embodiment.
Embodiment 1
Each component configuration in the binding agent: thermoplastic elastomer olefines 2.3%, brazil wax 45%, industrial paraffin 24.5%, high density polyethylene(HDPE) 25.1%, polypropylene 3% and stearic acid 0.1%.
The made metal powder injection molding of a kind of binding agent preparation method of feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent in the accurate weighing binding agent, described binding agent accounts for feeding mass ratio 6%, and promptly described metal-powder accounts for feeding mass ratio 94%, by this accurate weighing corresponding metal powder;
(2) mix: metal-powder is put into kneader mix and preheating, treat more than the temperature to 150 ℃, put into binding agent and fully kneading at interval half an hour in batches, wait to be kneaded into flow-like and mediate temperature and arrive 170 ℃, pick up counting and mediated 2 hours, and measured the material temperature in 20 minutes once, keep and mediate 170 ℃～180 ℃ of temperature, mediate and finish the discharging cooling, and it is broken into granular with crusher;
(3) extrude: use the twin screw extruder homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack, get the metal powder injection molding feeding.
Embodiment 2
Each component configuration in the binding agent: thermoplastic elastomer olefines 3.5%, brazil wax 38.8%, industrial paraffin 20.4%, high density polyethylene(HDPE) 32%, polypropylene 5% and stearic acid 0.3%.
The made metal powder injection molding of a kind of binding agent preparation method of feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent in the accurate weighing binding agent, described binding agent accounts for feeding mass ratio 7%, and promptly described metal-powder accounts for feeding mass ratio 93%, by this accurate weighing corresponding metal powder;
(2) mix: metal-powder is put into kneader mix and preheating, treat more than the temperature to 150 ℃, put into binding agent and fully kneading at interval half an hour in batches, wait to be kneaded into flow-like and mediate temperature and arrive 170 ℃, pick up counting and mediated 2 hours, and measured the material temperature in 20 minutes once, keep and mediate 170 ℃～180 ℃ of temperature, mediate and finish the discharging cooling, and it is broken into granular with crusher;
(3) extrude: use the twin screw extruder homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack, get the metal powder injection molding feeding.
Embodiment 3
Each component configuration in the binding agent: thermoplastic elastomer olefines 5%, brazil wax 35.1%, industrial paraffin 23%, high density polyethylene(HDPE) 26.5%, polypropylene 10% and stearic acid 0.4%.
The made metal powder injection molding of a kind of binding agent preparation method of feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent in the accurate weighing binding agent, described binding agent accounts for feeding mass ratio 8%, and promptly described metal-powder accounts for feeding mass ratio 92%, by this accurate weighing corresponding metal powder;
(2) mix: metal-powder is put into kneader mix and preheating, treat more than the temperature to 150 ℃, put into binding agent and fully kneading at interval half an hour in batches, wait to be kneaded into flow-like and mediate temperature and arrive 170 ℃, pick up counting and mediated 3 hours, and measured the material temperature in 20 minutes once, keep and mediate 170 ℃～180 ℃ of temperature, mediate and finish the discharging cooling, and it is broken into granular with crusher;
(3) extrude: use the twin screw extruder homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack, get the metal powder injection molding feeding.
Embodiment 4
Each component configuration in the binding agent: thermoplastic elastomer olefines 6%, brazil wax 31.5%, industrial paraffin 24%, high density polyethylene(HDPE) 27%, polypropylene 11% and stearic acid 0.5%.
The made metal powder injection molding of a kind of binding agent preparation method of feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent in the accurate weighing binding agent, described binding agent accounts for feeding mass ratio 9%, and promptly described metal-powder accounts for feeding mass ratio 91%, by this accurate weighing corresponding metal powder;
(2) mix: metal-powder is put into kneader mix and preheating, treat more than the temperature to 150 ℃, put into binding agent and fully kneading at interval half an hour in batches, wait to be kneaded into flow-like and mediate temperature and arrive 170 ℃, pick up counting and mediated 3 hours, and measured the material temperature in 20 minutes once, keep and mediate 170 ℃～180 ℃ of temperature, mediate and finish the discharging cooling, and it is broken into granular with crusher;
(3) extrude: use the twin screw extruder homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack, get the metal powder injection molding feeding.
Binding agent of the present invention and made metal powder injection molding feeding thereof, it is low to have the feeding cost of manufacture; Liquid-solid phase is not easily separated during moulding, and injection base density is even; Unsticking efficient height; The characteristics that sintered blank density is high.
Adopt Handan Ai Sier atomizing 316L powder the MIM feeding and the common cerul MIM feeding of the binder content 8.0% of proportioning embodiment 3 respectively, calibrated bolck with 70 * 12 * 3mm is an experimental subjects, use sea day injection moulding machine MA600 injection, injection pressure 145MPa, Tianjin, island graphite vacuum oven sintering, sintering temperature 1380 ℃ * 2 hours are used in the extraction back.
1) the feeding cost of manufacture is low
Calculate with the 316L feeding of making one batch of 20kg, feeding of the present invention relates to expense:
((40 yuan of the) ﹑ of the 18.4 * 65=1196 unit labour cost 30 Yuan ﹑ electricity charge add up to 1298 yuan to the) ﹑ 316L of 1.6 * 20=32 unit metal-powder 18400g to binding agent 1600g;
And 230 yuan/kg of import MIM feeding, then the 20kg price is 4600 yuan.Its cost of feeding of the present invention is 28% of an import MIM feeding price, and cost is lower, is adapted at the utilization and the popularization of domestic MIM industry.
2) liquid-solid phase is not easily separated during moulding, and injection base density is even
Standard is divided into 4 sections soon, respectively four sections density of this feeding and common feeding is measured comparison, data such as following table:
Two class feeding segmentation density are (g/cm3) relatively
| ? | First section | Second section | The 3rd section | The 4th section | Difference |
| Common feeding | 4.903 | 4.885 | 4.861 | 4.848 | 0.055 |
| This kind of feeding | 4.894 | 4.887 | 4.882 | 4.877 | 0.017 |
As seen adopt the made feeding density difference distance of the present invention obviously to reduce from showing to show, homogeneity significantly improves, and this just means littler product distortion and better dimensional precision concerning MIM technology
3) unsticking efficient improves
Its product strength of common feeding and deformation resistance are lower, and extraction temperature higher position slightly easily deforms, so can only extract at a slow speed by low temperature; And adopt its product strength of the made feeding of the present invention relative with deformation resistance higher, extraction temperature can be suitably improved, thereby rate of extraction can be improved.Respectively two kinds of made calibrated bolcks of feeding are carried out organic solvent extraction paraffin, 40 ℃ of common feeding calibrated bolck extraction temperature extract 18 hours unstickings and finish; And adopt the made feeding extraction temperature of the present invention is 60 ℃, extracts 10 hours unstickings and finishes.Feeding of the present invention has improved 44% on unsticking efficient, greatly improved the production efficiency of MIM.
4) sintered density height
The 316L calibrated bolck that adopts feeding of the present invention to make, use Tianjin, island graphite vacuum oven sintering, sintering temperature 1380 ℃ * 2 hours, its final sintered density is 7.80 g/cm3, reach 97.7% of theoretical density, satisfied the requirement that requires to surpass theoretical density 95% in the MIM industry fully.
The above; it only is the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (6)
1. binding agent, it is characterized in that: mixed by olefin hydrocarbons thermoplasticity elastic body, brazil wax, industrial paraffin, high density polyethylene(HDPE), polypropylene and stearic acid and form, each constituent mass per-cent is as follows: thermoplastic elastomer olefines 2.0-6.0%, brazil wax 25-45%, industrial paraffin 10-25%, high density polyethylene(HDPE) 25-35%, polypropylene 3-12% and stearic acid 0.1-0.5%.
2. binding agent according to claim 1 is characterized in that: described olefin hydrocarbons thermoplasticity elastic body is made up of olefin resin and olefin copolymer rubber.
3. the made metal powder injection molding of a binding agent is characterized in that: have the step of being prepared as follows with the preparation method of feeding:
(1) batching: according to the ratio of various materials described in the above-mentioned binding agent, each constituent and metal-powder in the accurate weighing binding agent;
(2) mix: metal-powder is put into kneader mix and preheating, treat to put into binding agent more than the temperature to 150 ℃, fully mediate, mediate and finish the discharging cooling, and be broken into granular;
(3) extrude: use the forcing machine homogenize to extrude three times, cooling is broken;
(4) vacuum packaging: vacuumize after the product that fragmentation is good installs with vacuum packaging bag and pack.
4. the made metal powder injection molding of a kind of binding agent according to claim 3 preparation method of feeding, it is characterized in that: described binding agent accounts for feeding mass ratio 6%-9%, and described metal-powder accounts for feeding mass ratio 91%-94%.
5. the made metal powder injection molding of a kind of binding agent according to claim 3 preparation method of feeding, it is characterized in that: the temperature of reaction of described kneading is 170-180 ℃, the time of kneading is 2-3 hour.
6. the made metal powder injection molding of a kind of binding agent according to claim 3 preparation method of feeding, it is characterized in that: described forcing machine is a twin screw extruder.
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| CN2010105747111A CN102115606B (en) | 2010-12-06 | 2010-12-06 | Adhesive and method for preparing metal powder injection molding feedstock from same |
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| CN2010105747111A CN102115606B (en) | 2010-12-06 | 2010-12-06 | Adhesive and method for preparing metal powder injection molding feedstock from same |
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| CN102115606B CN102115606B (en) | 2012-07-25 |
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Cited By (17)
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| CN102228990A (en) * | 2011-06-17 | 2011-11-02 | 湖南英捷高科技有限责任公司 | One-step molding process for optical communication assembly seat |
| CN104999075A (en) * | 2014-04-16 | 2015-10-28 | 江苏爱仕特精密电子科技有限公司 | Powder injection molding feeding material preparation technology and production equipment thereof |
| CN105372159A (en) * | 2015-12-10 | 2016-03-02 | 翁廷 | Method for detecting metal powder feedstock fluidity based on Archimedes spiral mold |
| CN106670451A (en) * | 2016-12-28 | 2017-05-17 | 江苏精研科技股份有限公司 | Formula and preparation method of copper alloy feed for powder injection molding |
| CN107052346A (en) * | 2016-12-28 | 2017-08-18 | 江苏精研科技股份有限公司 | The preparation technology of powder injection forming tungsten-nickel hard alloy |
| CN107199334A (en) * | 2017-04-20 | 2017-09-26 | 东莞华晶粉末冶金有限公司 | A kind of metal powder injection molding feeding and preparation method thereof |
| CN108136501A (en) * | 2015-10-02 | 2018-06-08 | 株式会社3D控制 | Constituent containing 3 D-printing metal powder, as the 3 D-printing method of raw material and 3 D-printing device |
| CN108339973A (en) * | 2018-02-02 | 2018-07-31 | 东莞华晶粉末冶金有限公司 | Hard alloy is injection moulded feeding and preparation method thereof |
| CN108620589A (en) * | 2018-04-13 | 2018-10-09 | 精研（东莞）科技发展有限公司 | A kind of preparation method of metal powder metallurgy camera shooting head circle |
| CN108856700A (en) * | 2017-05-08 | 2018-11-23 | 东莞华晶粉末冶金有限公司 | Ceramet group feeding and preparation method thereof, ceramet group green body and preparation method thereof |
| CN108856712A (en) * | 2018-03-27 | 2018-11-23 | 浙江易亲工业科技有限公司 | A kind of MIM technique feeding binder and its application |
| 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 |
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| CN110280768A (en) * | 2019-07-10 | 2019-09-27 | 嘉兴精科科技有限公司 | A kind of powder injection-molded de- property binder of acid and preparation method thereof |
| CN110480016A (en) * | 2019-09-17 | 2019-11-22 | 江苏精研科技股份有限公司 | A method of labyrinth function ceramics part is prepared using powder injection-molded |
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| CN113579228A (en) * | 2021-08-05 | 2021-11-02 | 冈奇金属科技（上海）有限公司 | Binder for metal powder injection molding, feed containing binder and manufacturing method of feed |
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| CN1644277A (en) * | 2004-12-14 | 2005-07-27 | 重庆工学院 | Electronic sealed metal casing powder injecting forming binder formula |
| CN101235265A (en) * | 2008-01-28 | 2008-08-06 | 王明喜 | Adhesive and feeding material prepared thereby for metal powder injection molding |
| CN101670438A (en) * | 2008-09-12 | 2010-03-17 | 深圳市注成科技有限公司 | Metal injection molding product and carbon control method thereof in manufacturing process |
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| CN102228990A (en) * | 2011-06-17 | 2011-11-02 | 湖南英捷高科技有限责任公司 | One-step molding process for optical communication assembly seat |
| CN102228990B (en) * | 2011-06-17 | 2013-03-20 | 湖南英捷高科技有限责任公司 | One-step molding process for optical communication assembly seat |
| CN104999075A (en) * | 2014-04-16 | 2015-10-28 | 江苏爱仕特精密电子科技有限公司 | Powder injection molding feeding material preparation technology and production equipment thereof |
| CN104999075B (en) * | 2014-04-16 | 2018-01-23 | 江苏爱仕特精密电子科技有限公司 | A kind of powder injection forming feeding preparation technology and its production equipment |
| CN108136501A (en) * | 2015-10-02 | 2018-06-08 | 株式会社3D控制 | Constituent containing 3 D-printing metal powder, as the 3 D-printing method of raw material and 3 D-printing device |
| CN105372159A (en) * | 2015-12-10 | 2016-03-02 | 翁廷 | Method for detecting metal powder feedstock fluidity based on Archimedes spiral mold |
| CN106670451A (en) * | 2016-12-28 | 2017-05-17 | 江苏精研科技股份有限公司 | Formula and preparation method of copper alloy feed for powder injection molding |
| CN107052346A (en) * | 2016-12-28 | 2017-08-18 | 江苏精研科技股份有限公司 | The preparation technology of powder injection forming tungsten-nickel hard alloy |
| CN106670451B (en) * | 2016-12-28 | 2018-11-27 | 江苏精研科技股份有限公司 | Powder injection forming copper alloy feeding |
| CN107199334A (en) * | 2017-04-20 | 2017-09-26 | 东莞华晶粉末冶金有限公司 | A kind of metal powder injection molding feeding and preparation method thereof |
| CN108856700A (en) * | 2017-05-08 | 2018-11-23 | 东莞华晶粉末冶金有限公司 | Ceramet group feeding and preparation method thereof, ceramet group green body and preparation method thereof |
| CN108339973A (en) * | 2018-02-02 | 2018-07-31 | 东莞华晶粉末冶金有限公司 | Hard alloy is injection moulded feeding and preparation method thereof |
| CN108856712A (en) * | 2018-03-27 | 2018-11-23 | 浙江易亲工业科技有限公司 | A kind of MIM technique feeding binder and its application |
| CN108620589A (en) * | 2018-04-13 | 2018-10-09 | 精研（东莞）科技发展有限公司 | A kind of preparation method of metal powder metallurgy camera shooting head circle |
| 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 |
| CN111014642A (en) * | 2018-10-10 | 2020-04-17 | 中南大学 | Oil wax-based binder for metal injection molding and feeding preparation method thereof |
| CN109794601A (en) * | 2019-01-03 | 2019-05-24 | 深圳市众德祥科技有限公司 | A kind of metal powder injection molding uses feeding and preparation method thereof with high circulation |
| CN110280768A (en) * | 2019-07-10 | 2019-09-27 | 嘉兴精科科技有限公司 | A kind of powder injection-molded de- property binder of acid and preparation method thereof |
| CN110480016A (en) * | 2019-09-17 | 2019-11-22 | 江苏精研科技股份有限公司 | A method of labyrinth function ceramics part is prepared using powder injection-molded |
| CN110480016B (en) * | 2019-09-17 | 2021-11-05 | 江苏精研科技股份有限公司 | Method for preparing functional ceramic part with complex structure by adopting powder injection molding |
| CN113579228A (en) * | 2021-08-05 | 2021-11-02 | 冈奇金属科技（上海）有限公司 | Binder for metal powder injection molding, feed containing binder and manufacturing method of feed |
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Address after: 213023, Hexi Road, Changzhou Economic Development Zone, Jiangsu, China, No. 16-8, Hexi Road Applicant after: Changzhou Gian Technology Co., Ltd. Address before: 213023 Jiangsu province Changzhou City Zhonglou District Xinggang Road No. 65-8 Applicant before: Changzhou Gian Technology Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213023, Hexi Road, Changzhou Economic Development Zone, Jiangsu, China, No. 16-8, Hexi Road Patentee after: JIANGSU GIAN TECHNOLOGY CO., LTD. Address before: 213023, Hexi Road, Changzhou Economic Development Zone, Jiangsu, China, No. 16-8, Hexi Road Patentee before: Changzhou Gian Technology Co., Ltd. |