CN107052343A - A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth - Google Patents

A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth Download PDF

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Publication number
CN107052343A
CN107052343A CN201710116068.XA CN201710116068A CN107052343A CN 107052343 A CN107052343 A CN 107052343A CN 201710116068 A CN201710116068 A CN 201710116068A CN 107052343 A CN107052343 A CN 107052343A
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CN
China
Prior art keywords
temperature
sinter
fuel injector
low pressure
pressure fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710116068.XA
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Chinese (zh)
Inventor
唐飞
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SHANGHAI FUTURE HI-TECH CO LTD
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SHANGHAI FUTURE HI-TECH CO LTD
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Publication date
Application filed by SHANGHAI FUTURE HI-TECH CO LTD filed Critical SHANGHAI FUTURE HI-TECH CO LTD
Priority to CN201710116068.XA priority Critical patent/CN107052343A/en
Publication of CN107052343A publication Critical patent/CN107052343A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/115Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups

Abstract

The invention discloses a kind of method that use MIM technologies produce automobile low pressure fuel injector mouth, its step is as follows:(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 90 95%, resin Quito component binding agent 5 10%;Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:90 110 DEG C, material temperature:180 210 DEG C, the 0.9Bar of injection pressure 0.7;Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, 130 DEG C of skimming temp, degreasing protective atmosphere NH3, degreasing time 35 hours;Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Using common batch vacuum sintering furnace, protective atmosphere is sintered:Ar2, sinter 1300 DEG C of the highest temperature;Whole 20 22 hours sintering periods;Mold insert is pressed into atomizer using tool and completes to assemble.The present invention uses MIM techniques, and production efficiency is improved, and batch cost only has the 50% of traditional handicraft, and whole production process complies fully with drawing requirement without waste of material, dimensional accuracy.

Description

A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth
Technical field
Patent of the present invention is related to a kind of parts machining method, is specifically given birth to MIM (metal powder injection molding) method Steam car low pressure fuel injector mouth
Background technology
Automobile low pressure fuel injector mouth, its classical production process is usually that atomizer is decomposed into 2 structural members, is passed through respectively CNC is processed, and then by the way that 2 structural members are welded into nozzle-valve assembly, classical production process has spillage of material height, energy consumption It is high, the shortcomings of efficiency is low, manufacturing cost is high, and use MIM (metal powder injection molding) technology can be by nozzle-valve assembly one It is body formed, the processes such as machining, welding are saved, can realize that the 100% of material is utilized, with the process-cycle is short, power consumption is low, manufacture The features such as process safety is pollution-free.Metal Injection Molding is one of most popular material forming technique at present, especially It is adapted to the complicated part high-volume of 3D shape, industrialized production, therefore Metal Injection Molding is applied in automobile In the manufacture production of low pressure fuel injector mouth, it is expected to thoroughly solve the difficulty faced at present, and as one reach high-performance, high efficiency, The production ways of low cost.
The content of the invention
The invention discloses a kind of method that use MIM technologies produce automobile low pressure fuel injector mouth, to solve existing production process The problems such as height, high energy consumption is lost in middle part material, efficiency is low, manufacturing cost is high.
The purpose of the present invention is achieved through the following technical solutions.
A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth, its step is as follows:
(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 90-95%, resin Quito component Binding agent 5-10%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:90-110 DEG C, Material temperature:180-210 DEG C, injection pressure 0.7-0.9Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 3-5 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole sintering period 20-22 hour;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble.
Further, a kind of method that use MIM technologies produce automobile low pressure fuel injector mouth, its step is as follows:
(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 93.7%, resin Quito component is glued Tie agent 6.3%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:90-110 DEG C, Material temperature:180-210 DEG C, injection pressure 0.7-0.9Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 4 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole 21 hours sintering periods;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble.
430 described stainless steel material powder are selected from the 17-4PH of BASF Corp. of Germany.
Described binding agent is acetal resin (POM) 80-95%;Vinyl-vinyl acetate copolymer (EVA) 2-8%; High density polyethylene (HDPE) (HDPE) and stearic acid (SA) it is any than mixture 1-8%.
Described binding agent is acetal resin (POM) 90%;Vinyl-vinyl acetate copolymer (EVA) 5%;It is highly dense Spend polyethylene (HDPE) and stearic acid (SA) it is any than mixture 5%.
Described mould structure is two template dies, and glue is entered using latent cast gate.
The invention has the advantages that:This part is automobile low pressure fuel injector mouth, complicated, and its traditional handicraft is used Low pressure fuel injector mouth is decomposed into 2 structural members, after being processed through CNC, then completion is welded, spillage of material height, high energy consumption, efficiency is low, Manufacturing cost is high, and portioned product does not coincide in the presence of assembling, or failure welding, and percent defective is high.After MIM techniques, production effect Rate is improved, and batch cost only has the 50% of traditional handicraft, and whole production process complies fully with drawing without waste of material, dimensional accuracy It is required that.
Embodiment
The technical characterstic of the present invention is expanded on further with reference to specific embodiment.
430 described stainless steel material powdered ingredients are C≤0.08;Si≤1;Mn≤1;Gr:15-17.5;Surplus is iron. 430 described stainless steel material powder are selected from the 17-4PH of BASF Corp. of Germany.
Embodiment 1
(1) by weight percentage, following raw material is weighed:17-4PH powder 90%, resin Quito component binding agent 0%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:110 DEG C, material Temperature:190 DEG C, injection pressure 0.8Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 3 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole sintering period 20-22 hour;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble, automobile low pressure fuel injector mouth is obtained.
Yield rate 95%.
Embodiment 2
(1) by weight percentage, following raw material is weighed:17-4PH powder 95%, resin Quito component binding agent 5%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:110 DEG C, material Temperature:210 DEG C, injection pressure 0.9Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 5 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole sintering period 20-22 hour;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble, automobile low pressure fuel injector mouth is obtained.
Yield rate 96%.
Embodiment 3
(1) by weight percentage, following raw material is weighed:17-4PH powder 90-95%, resin Quito component binding agent 5- 10%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:100 DEG C, material Temperature:200 DEG C, injection pressure 0.7Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 4 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole sintering period 20-22 hour;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble, automobile low pressure fuel injector mouth is obtained.
Yield rate 93%.
Embodiment 4
(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 93.7%, resin Quito component is glued Tie agent 6.3%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:100 DEG C, material Temperature:190 DEG C, injection pressure 0.8Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 4 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Between common Formula of having a rest vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole 21 hours sintering periods;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble.Obtain automobile low pressure fuel injector mouth.
Yield rate 99.5%.

Claims (6)

1. a kind of method that use MIM technologies produce automobile low pressure fuel injector mouth, it is characterised in that:Its step is as follows:
(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 90-95%, resin Quito component is bonded Agent 5-10%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:90-110 DEG C, material temperature: 180-210 DEG C, injection pressure 0.7-0.9Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 3-5 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Use common batch Vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole sintering period 20-22 hour;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble.
2. the method that a kind of use MIM technologies according to claim 1 produce automobile low pressure fuel injector mouth, it is characterised in that:Its Step is as follows:
(1) by weight percentage, following raw material is weighed:430 stainless steel material powder 93.7%, resin Quito component binding agent 6.3%;
(2) feeding:Blank is injected into using mould on plastic-injection moulding machine, wherein, mold temperature:90-110 DEG C, material temperature: 180-210 DEG C, injection pressure 0.7-0.9Bar;
(3) degreasing:Most of organic substance in injection base is removed under atmosphere protection using high temperature, wherein, skimming temp 130 DEG C, degreasing protective atmosphere NH3, degreasing time 4 hours;
(4) sinter:Sinter final part state under hydrogen shield atmosphere in intermittent vacuum stove;Use common batch Vacuum sintering furnace, sinters protective atmosphere:Ar2, sinter 1300 DEG C of the highest temperature;Whole 21 hours sintering periods;
(5) assemble:Mold insert is pressed into atomizer using tool and completes to assemble.
3. the method that a kind of use MIM technologies according to claim 1 or 2 produce automobile low pressure fuel injector mouth, it is characterised in that: 430 stainless steel material powder are selected from the 17-4PH of BASF Corp. of Germany.
4. the method that a kind of use MIM technologies according to claim 1 or 2 produce automobile low pressure fuel injector mouth, it is characterised in that: Described binding agent is acetal resin (POM) 80-95%;Vinyl-vinyl acetate copolymer (EVA) 2-8%;High density is gathered Ethene (HDPE) and stearic acid (SA) it is any than mixture 1-8%.
5. the method that a kind of use MIM technologies according to claim 4 produce automobile low pressure fuel injector mouth, it is characterised in that:Institute The binding agent stated is acetal resin (POM) 90%;Vinyl-vinyl acetate copolymer (EVA) 5%;High density polyethylene (HDPE) (HDPE) and stearic acid (SA) it is any than mixture 5%.
6. the method that a kind of use MIM technologies according to claim 1 or 2 produce automobile low pressure fuel injector mouth, it is characterised in that: In step (2), mould structure is two template dies, and glue is entered using latent cast gate.
CN201710116068.XA 2017-03-01 2017-03-01 A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth Pending CN107052343A (en)

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CN201710116068.XA CN107052343A (en) 2017-03-01 2017-03-01 A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth

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Application Number Priority Date Filing Date Title
CN201710116068.XA CN107052343A (en) 2017-03-01 2017-03-01 A kind of method that use MIM technologies produce automobile low pressure fuel injector mouth

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108817401A (en) * 2018-06-06 2018-11-16 东莞华晶粉末冶金有限公司 1.4435 stainless steel is injection moulded feeding and preparation method thereof
CN109014214A (en) * 2018-09-03 2018-12-18 广西冶金研究院有限公司 A kind of preparation method and HK30 blade based on the molding HK30 material of MIM

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325331A (en) * 1998-08-27 2001-12-05 联合讯号公司 Process for debinding and sintering metal injection molded parts made with an aqueous binder
CN102649157A (en) * 2011-02-25 2012-08-29 山东金聚粉末冶金有限公司 Latch segment and manufacturing method thereof
CN104107913A (en) * 2014-07-25 2014-10-22 株洲华宏机械制造有限公司 Oil nozzle matching part needle valve body and manufacturing method thereof
CN105537595A (en) * 2015-12-28 2016-05-04 上海富驰高科技有限公司 MIM manufacturing process for non-magnetic 17-4P stainless steel parts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325331A (en) * 1998-08-27 2001-12-05 联合讯号公司 Process for debinding and sintering metal injection molded parts made with an aqueous binder
CN102649157A (en) * 2011-02-25 2012-08-29 山东金聚粉末冶金有限公司 Latch segment and manufacturing method thereof
CN104107913A (en) * 2014-07-25 2014-10-22 株洲华宏机械制造有限公司 Oil nozzle matching part needle valve body and manufacturing method thereof
CN105537595A (en) * 2015-12-28 2016-05-04 上海富驰高科技有限公司 MIM manufacturing process for non-magnetic 17-4P stainless steel parts

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108817401A (en) * 2018-06-06 2018-11-16 东莞华晶粉末冶金有限公司 1.4435 stainless steel is injection moulded feeding and preparation method thereof
CN109014214A (en) * 2018-09-03 2018-12-18 广西冶金研究院有限公司 A kind of preparation method and HK30 blade based on the molding HK30 material of MIM
CN109014214B (en) * 2018-09-03 2020-06-02 广西科技大学 Preparation method of HK30 material based on MIM molding and HK30 blade

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Application publication date: 20170818