JPH10158703A - Production of sintered product having hollow part - Google Patents
Production of sintered product having hollow partInfo
- Publication number
- JPH10158703A JPH10158703A JP8319867A JP31986796A JPH10158703A JP H10158703 A JPH10158703 A JP H10158703A JP 8319867 A JP8319867 A JP 8319867A JP 31986796 A JP31986796 A JP 31986796A JP H10158703 A JPH10158703 A JP H10158703A
- Authority
- JP
- Japan
- Prior art keywords
- core
- sintered
- product
- sintered material
- sintering
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3665—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders
- B29C2043/3668—Moulds for making articles of definite length, i.e. discrete articles cores or inserts, e.g. pins, mandrels, sliders destructible or fusible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
Landscapes
- Powder Metallurgy (AREA)
- Golf Clubs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、中子を使用して中
空部を有する焼結品を製造する方法に関する。The present invention relates to a method for producing a sintered product having a hollow portion using a core.
【０００２】[0002]
【従来の技術】これに関する従来の焼結品製造装置が特
開平３−２８５００１号公報に記載されており、その模
式図が図６に示されている。前記焼結品製造装置１は、
上下が開放されたシリンダ形状の非導電性の型２と、そ
の型２に上方及び下方から挿入される一対のピストン状
の電極４とを備えている。そして、上下の電極４の間に
焼結材ｗの粉体粒子と中子６とが収納されるようになっ
ている。ここで、焼結材ｗの材料には金属材料等が焼結
品の用途に応じて使用され、また、中子６の材料には黒
鉛等を混入させた導電性の樹脂が使用される。2. Description of the Related Art A conventional sintered product manufacturing apparatus relating to this is disclosed in Japanese Patent Application Laid-Open No. 3-285001, and a schematic diagram thereof is shown in FIG. The sintered product manufacturing apparatus 1 includes:
The mold 2 includes a cylindrical non-conductive mold 2 whose top and bottom are open, and a pair of piston-like electrodes 4 inserted into the mold 2 from above and below. The powder particles of the sintered material w and the core 6 are stored between the upper and lower electrodes 4. Here, a metal material or the like is used for the material of the sintered material w according to the use of the sintered product, and a conductive resin mixed with graphite or the like is used for the material of the core 6.
【０００３】上下の電極４の間に焼結材ｗの粉体粒子と
中子６とが収納されると、それらの電極４によって焼結
材ｗの粉体粒子と中子６とが所定圧力で押圧され、さら
に、前記電極４にはパルス電源７からパルス電力が供給
される。これによって、焼結材ｗの粉体粒子間にはプラ
ズマ放電が発生し、このプラズマ放電の熱によって焼結
材ｗが焼結する。次に、前記焼結材ｗが型２から取出さ
れ、再び加熱されることにより、その焼結材ｗから中子
６が溶融状態で除去されて中空の焼結品が得られる。When the powder particles of the sintering material w and the core 6 are stored between the upper and lower electrodes 4, the powder particles of the sintering material w and the core 6 are pressed by the electrodes 4 at a predetermined pressure. , And pulse power is supplied to the electrode 4 from a pulse power supply 7. As a result, a plasma discharge is generated between the powder particles of the sintered material w, and the sintered material w is sintered by the heat of the plasma discharge. Next, the sintered material w is taken out of the mold 2 and heated again, whereby the core 6 is removed in a molten state from the sintered material w to obtain a hollow sintered product.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
た焼結品の製造方法によると、中子６は焼結材ｗよりも
融点が低い樹脂が使用されており、さらに、中子６と焼
結材ｗの粉体粒子とは直接接触するようになっている。
このため、プラズマ放電の熱で焼結材ｗの粉体粒子が相
互に溶着する際に溶けた樹脂の一部が粉体粒子間に浸入
し、残存することで、溶着に不完全な部位が発生する。
また、粉体粒子間に残存した樹脂が気化することによ
り、焼結品の割れ等の欠陥が発生し易くなる。請求項
１、請求項２及び請求項３に記載された発明は、溶けた
中子が成形された焼結材に影響を与えないようにして、
焼結品の割れ等の発生を防止しようとするものである。However, according to the above-described method for producing a sintered product, the core 6 is made of a resin having a melting point lower than that of the sintered material w. It comes into direct contact with the powder particles of the material w.
For this reason, when the powder particles of the sintering material w fuse with each other due to the heat of the plasma discharge, part of the melted resin penetrates between the powder particles and remains, so that a part incompletely welded is formed. Occur.
In addition, since the resin remaining between the powder particles is vaporized, defects such as cracks in the sintered product are likely to occur. The invention described in claim 1, claim 2, and claim 3 is such that the melted core does not affect the formed sintered material,
The purpose is to prevent the occurrence of cracks and the like in the sintered product.
【０００５】[0005]
【課題を解決するための手段】上記した課題は、以下の
特徴の中空部を有する焼結品の製造方法によって解決さ
れる。即ち、請求項１に記載された中空部を有する焼結
品の製造方法は、焼結材よりも低い融点の材料で中子を
成形する工程と、中子が溶融するとき、溶けた中子によ
って製品形状に成形された焼結材が影響を受けないよう
に、その中子の表面処理を行う工程と、その表面処理を
行った中子を型内に位置決めし、その型内に焼結材の粉
体粒子を充填した後、加圧して焼結材を製品形状に成形
する工程と、前記中子を溶融させて前記焼結材から除去
した後、又はそれと同時に、その焼結材を焼結する工程
と、を有している。請求項１に記載された発明による
と、中子には表面処理が施されているため、中子を溶融
させて焼結材から取出す際やその焼結材を焼結させる際
に、溶融した中子によって焼結材が影響を受けることが
ない。このため、焼結時に焼結材の粉体粒子間の溶着が
確実に行われるとともに、従来のように、粉体粒子間に
浸入した中子材料が気化するようなことがないため、焼
結品に割れ等の欠陥が発生し難くなる。The above object is achieved by a method for producing a sintered product having a hollow portion having the following characteristics. That is, the method for producing a sintered product having a hollow portion according to claim 1 includes a step of forming a core with a material having a melting point lower than that of a sintered material, and a step of melting the core when the core is melted. Surface treatment of the core so that the sintered material formed into the product shape is not affected by the process, positioning the core with the surface treatment in the mold, and sintering in the mold After filling the powder particles of the material, a step of pressing and molding the sintered material into a product shape, and after the core is melted and removed from the sintered material, or at the same time, the sintered material is Sintering. According to the first aspect of the present invention, since the core is subjected to the surface treatment, when the core is melted and taken out of the sintered material or when the sintered material is sintered, the core is melted. The core does not affect the sintered material. Therefore, welding between the powder particles of the sintered material is reliably performed at the time of sintering, and the core material penetrating between the powder particles does not evaporate as in the related art. Defects such as cracks are less likely to occur in the product.
【０００６】また、請求項２に記載された中空部を有す
る焼結品の製造方法は、焼結材よりも低い融点の材料で
中子を成形する工程と、中子が溶融するときにその溶け
た中子が製品形状に成形された焼結材の粉体粒子間に浸
入しないように、その中子の表面処理を行う工程と、そ
の表面処理を行った中子を型内に位置決めし、その型内
に焼結材の粉体粒子を充填した後、加圧して焼結材を製
品形状に成形する工程と、前記中子を溶融させて前記焼
結材から除去した後、又はそれと同時に、その焼結材を
焼結する工程と、を有している。請求項２に記載された
発明によると、中子には表面処理が施されているため、
中子を溶融させて焼結材から取出す際やその焼結材を焼
結させる際に、溶融した中子が焼結材の粉体粒子間に浸
入することがない。このため、請求項１の場合と同様
に、焼結時に焼結材の粉体粒子間の溶着が確実に行われ
るとともに、焼結品に割れ等の欠陥が発生し難くなる。According to a second aspect of the present invention, there is provided a method of manufacturing a sintered product having a hollow portion, wherein a step of forming a core with a material having a melting point lower than that of a sintered material, A step of performing a surface treatment on the core so that the melted core does not enter between the powder particles of the sintered material formed into the product shape, and positioning the core with the surface treatment in a mold. After filling the powder particles of the sintering material in the mold, pressing and molding the sintering material into a product shape, and after removing the core from the sintering material by melting the core, or At the same time, sintering the sintered material. According to the invention described in claim 2, since the core is subjected to a surface treatment,
When the core is melted and taken out of the sintered material or when the sintered material is sintered, the molten core does not enter between the powder particles of the sintered material. Therefore, as in the case of the first aspect, welding between the powder particles of the sintering material is reliably performed at the time of sintering, and defects such as cracks are less likely to occur in the sintered product.
【０００７】また、請求項３に記載の発明は、請求項１
に記載された中空部を有する焼結品の製造方法におい
て、前記表面処理は、焼結材よりも高い融点の材料で中
子の表面に皮膜層を形成することを特徴とする。このた
め、中子を溶融させて焼結材から除去するときや、その
焼結材を焼結させるときでも皮膜層は溶融しないため、
溶けた中子のみならず皮膜層の一部も焼結材の粉体粒子
間に浸入することがない。[0007] The invention according to claim 3 provides the invention according to claim 1.
In the method for producing a sintered product having a hollow portion described in the above, the surface treatment is characterized in that a coating layer is formed on the surface of the core with a material having a higher melting point than the sintered material. Therefore, when the core is melted and removed from the sintered material, and even when the sintered material is sintered, the coating layer does not melt,
Not only the melted core but also a part of the coating layer does not enter between the powder particles of the sintered material.
【０００８】[0008]
【発明の実施の形態】以下、図１〜図５に基づいて、本
発明の一の実施の形態に係る中空部を有する焼結品の製
造方法について説明する。ここで、図１は本形態に係る
中空部を有する焼結品の製造装置の要部縦断面図を表し
ており、図２〜図５は本形態に係る中空部を有する焼結
品の製造方法を表している。中空部を有する焼結品の製
造装置１０は、焼結材ｗの粉体粒子を製品の形状に成形
するためのウレタンゴム製の成形型１２を備えている。
前記成形型１２は、上型１２ｕと下型１２ｄ及び上型１
２ｕ、下型１２ｄの周囲を被う保持外筒１２ｔとから構
成されており、型締めされた状態でその成形型１２の内
部にはキャビティ１２ｃが形成される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a longitudinal sectional view of a main part of a manufacturing apparatus for a sintered product having a hollow portion according to the present embodiment, and FIGS. 2 to 5 are diagrams for manufacturing a sintered product having a hollow portion according to the present embodiment. Represents the method. The apparatus 10 for manufacturing a sintered product having a hollow portion includes a molding die 12 made of urethane rubber for molding powder particles of a sintered material w into a product shape.
The mold 12 includes an upper mold 12u, a lower mold 12d, and an upper mold 1.
2u, and a holding outer cylinder 12t that covers the periphery of the lower mold 12d, and a cavity 12c is formed inside the molding die 12 in a clamped state.
【０００９】また、前記上型１２ｕには、キャビティ１
２ｃに焼結材ｗの粉体粒子を供給するための開孔１２ｋ
が形成されており、この開孔１２ｋが焼結材ｗの供給後
に栓材１２ｍにより塞がれるようになっている。さら
に、前記下型１２ｄには、中子１３をキャビティ１２ｃ
内の所定位置に位置決めするための支持ピン１４が固定
されている。ここで、前記焼結材ｗとしてはチタンの粉
体粒子が使用され、前記中子１３の材料としてはチタン
よりも融点が低いスズ（Sn) が好適に使用される。さら
に、前記中子１３の表面にはチタンよりも融点が高いジ
ルコニアが溶射されることにより、0.1 〜0.3mm 程度の
皮膜層１３ｃが形成されている。Further, the cavity 1 is provided in the upper mold 12u.
Opening 12k for supplying powder particles of sintered material w to 2c
The opening 12k is closed by the plug 12m after the supply of the sintered material w. Further, the core 13 is inserted into the cavity 12c in the lower mold 12d.
A support pin 14 for positioning at a predetermined position inside is fixed. Here, powder particles of titanium are used as the sintering material w, and tin (Sn) having a lower melting point than titanium is suitably used as the material of the core 13. Furthermore, a coating layer 13c of about 0.1 to 0.3 mm is formed on the surface of the core 13 by spraying zirconia having a melting point higher than that of titanium.
【００１０】さらに、前記製造装置１０は、ウレタンゴ
ム製の成形型１２を等方から4ton/cm2G の圧力で加圧す
るための液槽（図示されていない）と、前記成形型１２
から取り出された焼結材ｗを約500 ℃に加熱して中子１
３を溶解除去させる加熱部（図示されていない）と、前
記中子１３を除去した後の焼結材ｗを真空中で約1350℃
で焼結させる焼結部（図示されていない）とを備えてい
る。The manufacturing apparatus 10 further includes a liquid tank (not shown) for pressing the urethane rubber mold 12 at a pressure of 4 ton / cm 2 G from the isotropic state,
Of the sintered material w taken out from the furnace to about 500 ° C.
A heating unit (not shown) for dissolving and removing 3 and a sintered material w after removing the core 13 are heated at about 1350 ° C. in vacuum.
And a sintering section (not shown).
【００１１】次に、本実施の形態に係る中空部を有する
焼結品の製造方法の説明を行う。先ず、下型１２ｄの支
持ピン１４にジルコニアの皮膜層１３ｃを備える中子１
３がセットされて上型１２ｕが閉じられる。次に、その
上型１２ｕの開孔１２ｋから焼結材ｗの粉末粒子が成形
型１２のキャビティ１２ｃ内に充填されて、その開孔１
２ｋが栓材１２ｍによって塞がれる（図１参照）。この
ようにして、前記成形型１２内に中子１３と焼結材ｗの
粉末粒子とがセットされると、図２に示されるように、
成形型１２が前記液槽に収納され、その成形型１２に4t
on/cm2G の圧力が加えられる。これによって、前記キャ
ビティ１２ｃ内の焼結材ｗにも成形型１２を介して圧力
が加えられ、前記焼結材ｗが製品の形状に成形される。
なお、前記中子１３を支持する支持ピン１４の部分には
焼結材ｗの粉末粒子は充填されず、この部分が焼結品ｗ
の孔ｗｈになる（図３、図４参照）。Next, a method of manufacturing a sintered product having a hollow portion according to the present embodiment will be described. First, the core 1 provided with the zirconia coating layer 13c on the support pins 14 of the lower mold 12d.
3 is set and the upper mold 12u is closed. Next, the powder particles of the sintering material w are filled into the cavity 12c of the molding die 12 through the opening 12k of the upper mold 12u, and the opening 1k is formed.
2k is closed by the plug material 12m (see FIG. 1). In this way, when the core 13 and the powder particles of the sintered material w are set in the molding die 12, as shown in FIG.
The molding die 12 is housed in the liquid tank, and 4 t
A pressure of on / cm 2 G is applied. As a result, pressure is also applied to the sintered material w in the cavity 12c via the molding die 12, and the sintered material w is formed into a product shape.
The portion of the support pin 14 that supports the core 13 is not filled with the powder particles of the sintering material w.
(See FIGS. 3 and 4).
【００１２】前記焼結材ｗの成形が完了すると、成形型
１２が液槽から上げられて型開きが行われ、その成形型
１２から中子１３と一体に成形された焼結材ｗが取り出
される（図３参照）。次に、前記焼結材ｗが前記加熱部
で約500 ℃まで加熱されることにより中子１３のスズが
溶かされて、焼結品ｗの孔ｗｈに相当する部分から溶け
た中子１３が排除される（図４参照）。このとき、中子
１３の表面にはジルコニアの皮膜層１３ｃが形成されて
いるため、溶けたスズがその皮膜層１３ｃに遮られ、焼
結材ｗの粉末粒子間に浸入することがない。このように
して、中子１３が除去されると、焼結材ｗは焼結部にお
いて真空中で約1350℃まで加熱され、焼結材ｗの粉末粒
子が焼結されて中空部を有する焼結品ｗが成形される
（図５参照）。このとき、焼結材ｗの粉末粒子間には溶
けた中子１３が浸入していないため、焼結材ｗの品質劣
化や粉末粒子間に残留した中子材が真空中で気化するこ
と等による割れ等を防止することができる。When the molding of the sintered material w is completed, the molding die 12 is lifted from the liquid tank to open the mold, and the sintered material w formed integrally with the core 13 is taken out of the molding die 12. (See FIG. 3). Next, the tin of the core 13 is melted by heating the sintered material w to about 500 ° C. in the heating unit, and the core 13 melted from a portion corresponding to the hole wh of the sintered product w is formed. Excluded (see FIG. 4). At this time, since the coating layer 13c of zirconia is formed on the surface of the core 13, the dissolved tin is blocked by the coating layer 13c and does not enter between the powder particles of the sintered material w. When the core 13 is removed in this way, the sintered material w is heated in a sintering section to about 1350 ° C. in a vacuum, and the powder particles of the sintered material w are sintered to form a sintered body having a hollow portion. The finished product w is formed (see FIG. 5). At this time, since the melted core 13 has not penetrated between the powder particles of the sintered material w, the quality of the sintered material w is deteriorated, and the core material remaining between the powder particles is vaporized in vacuum. Cracks and the like can be prevented.
【００１３】ここで、本実施の形態に係る中空部を有す
る焼結品の製造方法では、焼結材ｗとしてチタン粉末粒
子を使用したが、鉄等の他の焼結材ｗでも適用可能であ
る。また、本実施の形態では、中子１３としてスズを使
用したが、亜鉛や鉛など焼結材ｗよりも融点が低い材料
であれば使用可能である。さらに、本実施の形態では、
中子１３の皮膜層１３ｃはジルコニアを溶射することに
より形成されたがシリカ系のセラミッスでも可能であ
る。また、中子１３の表面にジルコニアやセラミッスを
溶射する方法の他、セラミッス等を骨材とし水もしくは
アルコールをバインダとしたスラリーを中子の表面に塗
布する方法でも可能である。Here, in the method of manufacturing a sintered product having a hollow portion according to the present embodiment, titanium powder particles are used as the sintering material w, but other sintering materials w such as iron can be applied. is there. In this embodiment, tin is used as the core 13. However, any material such as zinc or lead having a lower melting point than the sintered material w can be used. Further, in the present embodiment,
The coating layer 13c of the core 13 is formed by spraying zirconia, but may be formed of a silica-based ceramic. In addition to the method of spraying zirconia or ceramics on the surface of the core 13, a method of applying a slurry of ceramics or the like as an aggregate and water or alcohol as a binder to the surface of the core is also possible.
【００１４】以上、本発明の実施の形態について説明し
たが、この本発明の実施の形態には請求の範囲に記載し
た技術的事項以外に次のような各種の技術的事項を有す
るものであることを付記しておく。 （１）請求項２に記載された中空部を有する焼結品の製
造方法において、皮膜層は、皮膜材料を金属製の中子の
表面に溶射することにより形成されることを特徴とする
中空部を有する焼結品の製造方法。 （２）請求項２に記載された中空部を有する焼結品の製
造方法において、皮膜層は、皮膜材料を液体に混ぜてス
ラリー状にしたものを中子に塗布することにより形成さ
れることを特徴とする中空部を有する焼結品の製造方
法。Although the embodiments of the present invention have been described above, the embodiments of the present invention have the following various technical items in addition to the technical items described in the claims. Please note that. (1) The method for producing a sintered product having a hollow portion according to claim 2, wherein the coating layer is formed by spraying a coating material onto a surface of a metal core. A method for producing a sintered product having a portion. (2) In the method for manufacturing a sintered product having a hollow portion according to claim 2, the coating layer is formed by mixing a coating material with a liquid to form a slurry and applying the slurry to a core. A method for producing a sintered product having a hollow portion, characterized by comprising:
【００１５】[0015]
【発明の効果】本発明によると、中子を溶融させて焼結
材から取出す際等に、溶融した中子が焼結材に影響を与
えないため、焼結時に焼結材の粉体粒子間の溶着が確実
に行われ、焼結品に割れ等の欠陥が発生し難くなって品
質が向上する。According to the present invention, when the core is melted and taken out of the sintered material, the molten core does not affect the sintered material. The inter-welding is performed reliably, and defects such as cracks are less likely to occur in the sintered product, and the quality is improved.
【図１】本発明の一の実施の形態に係る中空部を有する
焼結品の製造装置の要部縦断面図である。FIG. 1 is a vertical cross-sectional view of a main part of an apparatus for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention.
【図２】本発明の一の実施の形態に係る中空部を有する
焼結品の製造方法を表す縦断面図である。FIG. 2 is a longitudinal sectional view illustrating a method for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention.
【図３】本発明の一の実施の形態に係る中空部を有する
焼結品の製造方法を表す縦断面図である。FIG. 3 is a longitudinal sectional view illustrating a method for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention.
【図４】本発明の一の実施の形態に係る中空部を有する
焼結品の製造方法を表す縦断面図である。FIG. 4 is a longitudinal sectional view illustrating a method for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention.
【図５】本発明の一の実施の形態に係る中空部を有する
焼結品の製造方法を表す縦断面図である。FIG. 5 is a longitudinal sectional view illustrating a method for manufacturing a sintered product having a hollow portion according to one embodiment of the present invention.
【図６】従来の中空部を有する焼結品の製造装置の縦断
面図である。FIG. 6 is a longitudinal sectional view of a conventional apparatus for manufacturing a sintered product having a hollow portion.
ｗ 焼結材（焼結品） ｗｈ 孔 １２ 成形型 １２ｃ キャビティ １３ 中子 １３ｃ 皮膜層（表面処理） １４ 支持ピン w Sintered material (sintered product) wh Hole 12 Mold 12c Cavity 13 Core 13c Coating layer (surface treatment) 14 Support pin
Claims (3)
形する工程と、 中子が溶融するとき、溶けた中子によって製品形状に成
形された焼結材が影響を受けないように、その中子の表
面処理を行う工程と、 その表面処理を行った中子を型内に位置決めし、その型
内に焼結材の粉体粒子を充填した後、加圧して焼結材を
製品形状に成形する工程と、 前記中子を溶融させて前記焼結材から除去した後、又は
それと同時に、その焼結材を焼結する工程と、を有する
ことを特徴とする中空部を有する焼結品の製造方法。1. A step of forming a core with a material having a lower melting point than a sintered material, and when the core is melted, the sintered material formed into a product shape by the melted core is not affected. Then, a step of performing a surface treatment on the core, positioning the core on which the surface treatment has been performed in a mold, filling the mold with powder particles of the sintering material, and then pressing the sintering material. A hollow portion characterized by having a step of melting the core and removing the core from the sintered material, or at the same time, sintering the sintered material. Method for producing a sintered product having the same.
形する工程と、 中子が溶融するときにその溶けた中子が製品形状に成形
された焼結材の粉体粒子間に浸入しないように、その中
子の表面処理を行う工程と、 その表面処理を行った中子を型内に位置決めし、その型
内に焼結材の粉体粒子を充填した後、加圧して焼結材を
製品形状に成形する工程と、 前記中子を溶融させて前記焼結材から除去した後、又は
それと同時に、その焼結材を焼結する工程と、を有する
ことを特徴とする中空部を有する焼結品の製造方法。2. A step of molding a core with a material having a melting point lower than that of a sintered material, and a step of forming a core between the powder particles of the sintered material when the molten core is formed into a product shape. Surface treatment of the core so that it does not penetrate into the mold, positioning the core with the surface treatment in a mold, filling the mold with powder particles of the sintered material, and then applying pressure. And forming the sintered material into a product shape, and after the core is melted and removed from the sintered material, or at the same time, a step of sintering the sintered material, For producing a sintered product having a hollow portion.
結品の製造方法において、 前記表面処理は、焼結材よりも高い融点の材料で中子の
表面に皮膜層を形成することを特徴とする中空部を有す
る焼結品の製造方法。3. The method for manufacturing a sintered product having a hollow portion according to claim 1, wherein the surface treatment includes forming a coating layer on a surface of the core with a material having a higher melting point than a sintered material. A method for producing a sintered product having a hollow portion, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319867A JPH10158703A (en) | 1996-11-29 | 1996-11-29 | Production of sintered product having hollow part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8319867A JPH10158703A (en) | 1996-11-29 | 1996-11-29 | Production of sintered product having hollow part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10158703A true JPH10158703A (en) | 1998-06-16 |
Family
ID=18115127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8319867A Pending JPH10158703A (en) | 1996-11-29 | 1996-11-29 | Production of sintered product having hollow part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10158703A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007373B2 (en) * | 2009-05-19 | 2011-08-30 | Cobra Golf, Inc. | Method of making golf clubs |
| US9330406B2 (en) | 2009-05-19 | 2016-05-03 | Cobra Golf Incorporated | Method and system for sales of golf equipment |
| JP2017203211A (en) * | 2016-05-11 | 2017-11-16 | 寧海縣大雅精密機械有限公司Ｎｉｎｇｈａｉ Ｄａｙａ Ｐｒｅｃｉｓｉｏｎ Ｍａｃｈｉｎｅｒｙ Ｃｏ．，Ｌｔｄ | Production method of parts having internal pore structure |
-
1996
- 1996-11-29 JP JP8319867A patent/JPH10158703A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007373B2 (en) * | 2009-05-19 | 2011-08-30 | Cobra Golf, Inc. | Method of making golf clubs |
| US8323122B2 (en) * | 2009-05-19 | 2012-12-04 | Cobra Golf Incorporated | Method of making golf clubs |
| US9330406B2 (en) | 2009-05-19 | 2016-05-03 | Cobra Golf Incorporated | Method and system for sales of golf equipment |
| JP2017203211A (en) * | 2016-05-11 | 2017-11-16 | 寧海縣大雅精密機械有限公司Ｎｉｎｇｈａｉ Ｄａｙａ Ｐｒｅｃｉｓｉｏｎ Ｍａｃｈｉｎｅｒｙ Ｃｏ．，Ｌｔｄ | Production method of parts having internal pore structure |
| US10207324B2 (en) | 2016-05-11 | 2019-02-19 | Ninghai Daya Precision Machinery Co., Ltd. | Method for manufacturing parts with built-in channel |
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