JP2015131983A - iron powder molding method - Google Patents

iron powder molding method Download PDF

Info

Publication number
JP2015131983A
JP2015131983A JP2014003086A JP2014003086A JP2015131983A JP 2015131983 A JP2015131983 A JP 2015131983A JP 2014003086 A JP2014003086 A JP 2014003086A JP 2014003086 A JP2014003086 A JP 2014003086A JP 2015131983 A JP2015131983 A JP 2015131983A
Authority
JP
Japan
Prior art keywords
iron powder
cavity
mold
charged
product shape
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.)
Granted
Application number
JP2014003086A
Other languages
Japanese (ja)
Other versions
JP6102757B2 (en
Inventor
俊樹 森田
Toshiki Morita
俊樹 森田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2014003086A priority Critical patent/JP6102757B2/en
Publication of JP2015131983A publication Critical patent/JP2015131983A/en
Application granted granted Critical
Publication of JP6102757B2 publication Critical patent/JP6102757B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

PROBLEM TO BE SOLVED: To provide an iron powder molding method capable of reducing a density difference of iron powder flowing into a product shape in a metallic mold.SOLUTION: In an iron powder molding step S100 of molding iron powder F in a metallic mold 120, the iron powder F is put into an insulation container 110, is agitated and is charged, a surface of a cavity C of the metallic mold 120 is covered with a photoreceptor 130 charged at a potential of a side opposite to that of the iron powder F, a charged state of a place not being shielded in the photoreceptor 130 is cancelled by shielding a predetermined place of the surface of the cavity C covered by the photoreceptor 130 by a shield member 140 and exposing the surface of the cavity C by a light irradiation device 150, the metallic mold 120 having the surface of the cavity C exposed is filled with the iron powder F charged, a plurality of molds 120A, 120B through 120E and 125A, 125B through 125E are individually caused to be movable and the iron powder F filled is caused to flow so as to be a product shape, and the metallic mold 120 is pressurized and the iron powder F caused to flow into the product shape is compressed.

Description

本発明は、複数の型によってキャビティを形成する金型で鉄粉を成形する鉄粉成形方法の技術に関する。   The present invention relates to a technique of an iron powder molding method in which iron powder is molded with a mold that forms a cavity with a plurality of molds.

鉄粉を用いた粉末冶金では、鉄粉を成形金型にて押し固めて鉄粉成形体を成形し、鉄粉成形体を熱処理することにより製品が製造される（例えば、特許文献１）。また、複雑な形状の製品を製造する粉末冶金では、鉄粉を複数の型によってキャビティを形成する金型に充填し、金型のキャビティ内に充填された鉄粉を、複数の型をそれぞれ動かすことにより製品形状になるように流動させ、金型を加圧して充填された鉄粉を圧縮することにより製品が製造される。   In powder metallurgy using iron powder, a product is manufactured by pressing iron powder into a molding die to form an iron powder molded body and then heat-treating the iron powder molded body (for example, Patent Document 1). In powder metallurgy, which manufactures products with complex shapes, iron powder is filled into a mold that forms a cavity with a plurality of molds, and each of the plurality of molds is moved with the iron powder filled in the mold cavity. Thus, the product is manufactured by flowing the product into a product shape and compressing the filled iron powder by pressurizing the mold.

複数の型をそれぞれ動かして充填された鉄粉を製品形状になるように流動させる際に、金型の隅角部又は先端部に鉄粉が均一に充填されていない場合には、熱処理をする際に製品に割れが発生する場合がある。つまり、粉末冶金では、金型内で製品形状に流動した鉄粉を圧縮する前に、金型内での鉄粉の疎密差がなく均一であることが製品品質の観点から重要な課題となっている。   When iron powder filled by moving multiple molds to flow into a product shape, if the iron powder is not uniformly filled in the corner or tip of the mold, heat treatment is performed. In some cases, the product may crack. In other words, in powder metallurgy, before the iron powder that has flowed into the product shape in the mold is compressed, it is an important issue from the viewpoint of product quality that there is no difference in the density of the iron powder in the mold. ing.

特開２００６−２９１２３５号公報JP 2006-291235 A

本発明の解決しようとする課題は、金型内で製品形状に流動した鉄粉のキャビティ内の位置による疎密差を低減できる鉄粉成形方法を提供することである。   The problem to be solved by the present invention is to provide an iron powder molding method that can reduce the density difference due to the position in the cavity of the iron powder that has flowed into the product shape in the mold.

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。   The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

即ち、請求項１においては、複数の型によってキャビティを形成する金型で鉄粉を成形する鉄粉成形方法であって、鉄粉を絶縁体の容器に入れて撹拌し、該鉄粉を帯電させ、前記金型のキャビティの表面を、前記鉄粉とは反対側の電位に帯電した感光体で覆い、前記感光体で覆われたキャビティの表面の所定箇所を遮蔽して感光させることにより、前記感光体における遮蔽されていない箇所の帯電状態を解消し、前記帯電した鉄粉を、キャビティの表面が感光された金型に充填し、前記複数の型をそれぞれ可動させて前記充填された鉄粉を製品形状になるように流動させ、前記金型を加圧して前記製品形状になるように流動された鉄粉を圧縮するものである。   That is, according to claim 1, there is provided an iron powder forming method in which iron powder is formed by a mold in which a cavity is formed by a plurality of molds, and the iron powder is placed in an insulator container and stirred to charge the iron powder. And covering the surface of the cavity of the mold with a photosensitive member charged to a potential opposite to the iron powder, and shielding and exposing a predetermined portion of the surface of the cavity covered with the photosensitive member, The charged state of the unshielded portion of the photoconductor is eliminated, the charged iron powder is filled in a mold in which the surface of the cavity is exposed, and the plurality of molds are respectively moved to move the filled iron. The powder is made to flow into a product shape, and the mold is pressed to compress the iron powder that has flowed into the product shape.

本発明の鉄粉成形方法によれば、金型内で製品形状に流動した鉄粉のキャビティ内の位置による疎密差を低減できる。   According to the iron powder molding method of the present invention, it is possible to reduce the density difference due to the position in the cavity of the iron powder that has flowed into the product shape in the mold.

鉄粉成形工程の流れを示す模式図。The schematic diagram which shows the flow of an iron powder shaping | molding process. 同じく鉄粉成形工程の流れを示す模式図。The schematic diagram which similarly shows the flow of an iron powder shaping | molding process.

図１を用いて、鉄粉成形工程Ｓ１００の流れについて説明する。
なお、図１では、鉄粉成形工程Ｓ１００の流れを模式的に表している。 The flow of the iron powder forming step S100 will be described with reference to FIG.
In addition, in FIG. 1, the flow of iron powder shaping | molding process S100 is represented typically.

鉄粉成形工程Ｓ１００は、本発明の鉄粉成形方法に係る実施形態である。鉄粉成形工程Ｓ１００は、複数の型１２０Ａ・１２０Ｂ・・１２０Ｅ及び１２５Ａ・１２５Ｂ・・１２５ＥによってキャビティＣを形成する金型１２０で鉄粉Ｆを成形するものである。   The iron powder molding step S100 is an embodiment according to the iron powder molding method of the present invention. In the iron powder forming step S100, the iron powder F is formed by the mold 120 that forms the cavity C by the plurality of molds 120A, 120B,... 120E and 125A, 125B,.

ステップＳ１１０において、作業者は、鉄粉Ｆを帯電させる。本実施形態では、鉄粉Ｆを絶縁体容器１１０に充填して攪拌棒１１１により撹拌することによってプラス側の電位に帯電させる。また、本実施形態では、絶縁体容器１１０は、ポリエチレン製とされている。   In step S110, the worker charges the iron powder F. In this embodiment, iron powder F is charged in the insulator container 110 and stirred by the stirring rod 111 to be charged to a positive potential. In the present embodiment, the insulator container 110 is made of polyethylene.

なお、本実施形態では、攪拌棒１１１によって撹拌する構成としたが、これに限定されない。例えば、鉄粉Ｆを充填した絶縁体容器１１０を揺動することにより、鉄粉Ｆを帯電させる構成（摩擦帯電）であっても良い。また、例えば、接触帯電、剥離帯電又はイオン照射により鉄粉Ｆを帯電させる構成であっても良い。   In addition, in this embodiment, although it was set as the structure stirred with the stirring rod 111, it is not limited to this. For example, a configuration (friction charging) in which the iron powder F is charged by swinging the insulator container 110 filled with the iron powder F may be used. For example, the structure which charges the iron powder F by contact charging, peeling charging, or ion irradiation may be sufficient.

ステップＳ１２０において、作業者は、金型１２０のキャビティＣの表面を感光体１３０で覆うものとする。本実施形態では、感光体１３０は、安価な銀塩をキャビティＣの表面に塗布することによって構成されている。感光体１３０は、マイナス側の電位に帯電している。   In step S120, the operator covers the surface of the cavity C of the mold 120 with the photosensitive member 130. In this embodiment, the photoreceptor 130 is configured by applying an inexpensive silver salt to the surface of the cavity C. The photoreceptor 130 is charged to a negative potential.

なお、本実施形態では、キャビティＣの表面に塗布した銀塩を感光体１３０とする構成としたが、これに限定されない。例えば、シート（ポリエチレン、エポキシ樹脂等）又はフィルム状（塩化ビニル、フェノール樹脂等）の絶縁体に銀塩を塗布した感光体をキャビティＣの表面に被装しても良い。   In this embodiment, the silver salt applied to the surface of the cavity C is used as the photoconductor 130. However, the present invention is not limited to this. For example, a photosensitive member obtained by applying a silver salt to a sheet (polyethylene, epoxy resin, etc.) or film (vinyl chloride, phenol resin, etc.) insulator may be coated on the surface of the cavity C.

ステップＳ１３０において、作業者は、感光体１３０で覆われたキャビティＣの表面の所定箇所（金型１２０に鉄粉Ｆを引き付けたい箇所）を除く箇所を感光させる。具体的には、感光体１３０で覆われたキャビティＣの表面の所定箇所（金型１２０に鉄粉Ｆを引き付けたい箇所）を遮蔽部材１４０によって遮蔽し、光照射装置１５０によって感光体１３０を感光させる。キャビティＣの表面において、遮蔽部材１４０によって遮蔽する箇所は、例えば隅角部又は先端部である。   In step S <b> 130, the worker sensitizes a portion excluding a predetermined portion (a portion where the iron powder F is to be attracted to the mold 120) on the surface of the cavity C covered with the photoreceptor 130. Specifically, a predetermined portion (a portion where the iron powder F is to be attracted to the mold 120) on the surface of the cavity C covered with the photosensitive member 130 is shielded by the shielding member 140, and the photosensitive member 130 is exposed to light by the light irradiation device 150. Let On the surface of the cavity C, a portion shielded by the shielding member 140 is, for example, a corner portion or a tip portion.

このとき、感光体１３０において、感光した箇所は電位が消失し、感光していない箇所はマイナス側の電位に帯電した状態を保持する。   At this time, in the photosensitive member 130, the potential of the exposed portion disappears, and the portion not exposed to light is kept charged to a negative potential.

ステップＳ１４０において、作業者は、帯電した鉄粉Ｆを金型１２０に充填する。金型１２０は、複数の型１２０Ａ・１２０Ｂ・・１２０Ｅ及び１２５Ａ・１２５Ｂ・・１２５ＥによってキャビティＣを形成するプレス用の金型１２０である。   In step S140, the worker fills the mold 120 with the charged iron powder F. The mold 120 is a press mold 120 in which a cavity C is formed by a plurality of molds 120A, 120B, 120E and 125A, 125B, 125E.

ステップＳ１５０において、作業者は、複数の型１２０Ａ・１２０Ｂ・・１２０Ｅ及び１２５Ａ・１２５Ｂ・・１２５Ｅをそれぞれ可動させて、金型１２０（キャビティＣ）に充填された鉄粉Ｆが製品形状になるように流動させる。このとき、キャビティＣ表面に塗布した感光体１３０は、キャビティＣが製品形状に変形することに伴って、製品形状に沿った形状に変形する。   In step S150, the operator moves each of the plurality of molds 120A, 120B, 120E and 125A, 125B, 125E so that the iron powder F filled in the mold 120 (cavity C) has a product shape. To flow. At this time, the photoreceptor 130 applied to the surface of the cavity C is deformed into a shape along the product shape as the cavity C is deformed into the product shape.

ステップＳ１６０において、作業者は、金型１２０を加圧して充填された鉄粉Ｆを圧縮し、鉄粉Ｆの製品形状の成形体を成形する（図示略）。   In step S160, the operator pressurizes the mold 120 and compresses the filled iron powder F to form a product-shaped formed body of the iron powder F (not shown).

鉄粉成形工程Ｓ１００の作用について説明する。   The operation of the iron powder forming step S100 will be described.

ステップＳ１１０では、絶縁体容器１１０に充填された鉄粉Ｆが攪拌棒１１１によって撹拌される。このとき、鉄粉Ｆには鉄以外の絶縁性成分が含有されているため、鉄粉Ｆを絶縁体容器１１０内で攪拌することによって鉄粉Ｆがプラス側の電位に帯電する。   In step S110, the iron powder F filled in the insulator container 110 is stirred by the stirring rod 111. At this time, since the iron powder F contains an insulating component other than iron, the iron powder F is charged to a positive potential by stirring the iron powder F in the insulator container 110.

ステップＳ１２０では、金型１２０のキャビティＣの表面が感光体１３０で覆われる。   In step S <b> 120, the surface of the cavity C of the mold 120 is covered with the photoreceptor 130.

ステップＳ１３０では、感光体１３０で覆われたキャビティＣの表面の所定箇所（金型１２０に鉄粉Ｆを引き付けたい箇所）が遮蔽部材１４０によって遮蔽され、光照射装置１５０によって感光体１３０が感光される。ここで、感光体１３０は、帯電している状態で受光すると、電位がなくなる性質を有している。そこで、感光体１３０の所定箇所のみ（遮蔽部材１４０によって遮蔽された箇所）がマイナス側の電位に帯電された状態を保持し、所定箇所以外の電位がなくなる（所定箇所以外の帯電状態が解消される）状態となる。   In step S130, a predetermined portion on the surface of the cavity C covered with the photoreceptor 130 (a portion where the iron powder F is to be attracted to the mold 120) is shielded by the shielding member 140, and the photoreceptor 130 is exposed by the light irradiation device 150. The Here, the photosensitive member 130 has a property that the potential disappears when light is received in a charged state. Therefore, only a predetermined portion of the photosensitive member 130 (a portion shielded by the shielding member 140) is kept charged to a negative potential, and the potential other than the predetermined portion disappears (the charged state other than the predetermined portion is eliminated). State).

ステップＳ１４０では、帯電した鉄粉Ｆが金型１２０に充填される。   In step S140, the charged iron powder F is filled in the mold 120.

ステップＳ１５０では、複数の型１２０Ａ・１２０Ｂ・・１２０Ｅが、キャビティＣが製品形状になるように、それぞれ可動する。このとき、キャビティＣの表面に塗布されていた感光体１３０が、キャビティＣが製品形状に変形することに伴って製品形状に沿った形状に変形する。また、金型１２０（キャビティＣ）に充填された鉄粉Ｆは、キャビティＣが製品形状に変形することに伴って、製品形状になるように流動する。   In step S150, the plurality of molds 120A, 120B,... 120E move so that the cavity C has a product shape. At this time, the photoreceptor 130 applied to the surface of the cavity C is deformed into a shape along the product shape as the cavity C is deformed into the product shape. Further, the iron powder F filled in the mold 120 (cavity C) flows so as to have a product shape as the cavity C is deformed into a product shape.

このとき、プラス側の電位に帯電した鉄粉Ｆが、鉄粉Ｆとは反対側の電位であるマイナス側の電位に帯電した感光体１３０に接触すると引き付けられる性質があることから、製品形状になるように流動する鉄粉Ｆは、キャビティＣの表面を覆う感光体１３０の電位が残っている箇所（帯電されたままの箇所）に引き付けられる。そのため、帯電された状態にあるキャビティＣの表面の隅角部又は先端部に鉄粉Ｆが流動し易くなり、製品形状になるように流動する鉄粉ＦのキャビティＣ内の位置による疎密差が減少する。   At this time, the iron powder F charged to the positive potential has a property of being attracted when it comes into contact with the photoreceptor 130 charged to the negative potential, which is the potential opposite to the iron powder F. The iron powder F that flows in this manner is attracted to a portion where the potential of the photosensitive member 130 covering the surface of the cavity C remains (a portion that remains charged). For this reason, the iron powder F easily flows to the corner or tip of the surface of the cavity C in a charged state, and there is a difference in density depending on the position in the cavity C of the iron powder F that flows so as to have a product shape. Decrease.

鉄粉成形工程Ｓ１００の効果について説明する。
鉄粉成形工程Ｓ１００によれば、金型１２０のキャビティＣ内で製品形状となるように流動した鉄粉ＦのキャビティＣ内の位置による疎密差を低減できる。 The effect of the iron powder forming step S100 will be described.
According to the iron powder forming step S100, it is possible to reduce the density difference due to the position in the cavity C of the iron powder F that has flowed so as to have a product shape in the cavity C of the mold 120.

１１０ 絶縁体容器
１１１ 棒
１２０ 金型
１３０ 感光体
１４０ 遮蔽部材
１５０ 光照射装置
Ｆ 鉄粉

110 Insulator Container 111 Bar 120 Mold 130 Photoconductor 140 Shielding Member 150 Light Irradiation Device F Iron Powder

Claims (1)

複数の型によってキャビティを形成する金型で鉄粉を成形する鉄粉成形方法であって、
鉄粉を絶縁体の容器に入れて撹拌し、該鉄粉を帯電させ、
前記金型のキャビティの表面を、前記鉄粉とは反対側の電位に帯電した感光体で覆い、
前記感光体で覆われたキャビティの表面の所定箇所を遮蔽して感光させることにより、前記感光体における遮蔽されていない箇所の帯電状態を解消し、
前記帯電した鉄粉を、キャビティの表面が感光された金型に充填し、
前記複数の型をそれぞれ可動させて前記充填された鉄粉を製品形状になるように流動させ、
前記金型を加圧して前記製品形状になるように流動された鉄粉を圧縮する、
鉄粉成形方法。
An iron powder molding method of molding iron powder with a mold that forms a cavity with a plurality of molds,
Stir the iron powder in an insulator container to charge the iron powder,
Cover the surface of the cavity of the mold with a photoconductor charged to a potential opposite to the iron powder,
By shielding and exposing a predetermined portion of the surface of the cavity covered with the photoconductor, the charged state of the non-shielded portion on the photoconductor is eliminated,
The charged iron powder is filled in a mold in which the surface of the cavity is exposed,
Each of the plurality of molds is moved to flow the filled iron powder into a product shape,
Pressurizing the mold and compressing the iron powder that has flowed to the product shape;
Iron powder molding method.
JP2014003086A 2014-01-10 2014-01-10 Iron powder molding method Active JP6102757B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014003086A JP6102757B2 (en) 2014-01-10 2014-01-10 Iron powder molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014003086A JP6102757B2 (en) 2014-01-10 2014-01-10 Iron powder molding method

Publications (2)

Publication Number Publication Date
JP2015131983A true JP2015131983A (en) 2015-07-23
JP6102757B2 JP6102757B2 (en) 2017-03-29

Family

ID=53900227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014003086A Active JP6102757B2 (en) 2014-01-10 2014-01-10 Iron powder molding method

Country Status (1)

Country Link
JP (1) JP6102757B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005290518A (en) * 2004-04-02 2005-10-20 Nissan Motor Co Ltd Method for applying powdery lubricant, and applying device
JP2006291235A (en) * 2005-04-05 2006-10-26 Toyota Motor Corp Production device for metal powder compact in powder metallurgy, and production method therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005290518A (en) * 2004-04-02 2005-10-20 Nissan Motor Co Ltd Method for applying powdery lubricant, and applying device
JP2006291235A (en) * 2005-04-05 2006-10-26 Toyota Motor Corp Production device for metal powder compact in powder metallurgy, and production method therefor

Also Published As

Publication number Publication date
JP6102757B2 (en) 2017-03-29

Similar Documents

Publication Publication Date Title
CN106457396B (en) Increasing material manufacturing method and apparatus for carrying out the process based on powder bed
MX2018004465A (en) Aerosol-generating article, aerosol-generating pellet, method for forming aerosol-generating pellets and aerosol-generating system comprising aerosol-generating pellets.
EP3173872A3 (en) Developing member, method of producing the same, process cartridge and electrophotographic image forming apparatus
EP2824515A3 (en) Method of manufacturing developer container, developer container, developing apparatus, process cartridge, and image forming apparatus
EP3222381A3 (en) Additive manufacturing method and additive manufacturing machine
MY185302A (en) Method of forming a conductive image on a non-conductive surface
CN102529002B (en) Compression molding die and compress moulding method
WO2017075250A3 (en) Co-mold features on a chassis shell of a mobile device
EP4279203A3 (en) Manufacturing method of coil component
MX2015003171A (en) Electromagnetic relay.
PH12014501172A1 (en) Cartridge
JP2015149390A5 (en)
MX2018004045A (en) Metal oxide particles and method for producing same.
EP3069805A3 (en) Powered removal for element formed by electron beam melting
JP6102757B2 (en) Iron powder molding method
JP2016131200A5 (en)
CN108097973A (en) A kind of sintered powder material preparation method
EP3854755C0 (en) Surface treated-metal oxide particle material, method for producing same, resin composition for electronic material, and filler for silicone resin material
CN110062948A (en) Manufacturing method, the manufacturing method of core, core, reactor, soft magnetic composite material, the magnetic core using soft magnetic composite material and the reactor using soft magnetic composite material of reactor
MX2020011964A (en) Method and installation for making sand cores.
EP3322574B1 (en) Method and apparatus for forming thin layers of slurries for additive manufacturing
JP2015153721A (en) Method of manufacturing electrical wire with terminal
FI3889278T3 (en) Process for producing an iron ore fines agglomerate and the agglomerate product
PL3738672T3 (en) An apparatus for pulverizing material including a stationary housing and a method for producing the stationary housing
PL3852991T3 (en) Machine and method for compacting powder material

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20151217

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160315

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170131

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170131

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170213

R151 Written notification of patent or utility model registration

Ref document number: 6102757

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20171031