JPH07173504A - Die assembly for compacting - Google Patents
Die assembly for compactingInfo
- Publication number
- JPH07173504A JPH07173504A JP4064394A JP4064394A JPH07173504A JP H07173504 A JPH07173504 A JP H07173504A JP 4064394 A JP4064394 A JP 4064394A JP 4064394 A JP4064394 A JP 4064394A JP H07173504 A JPH07173504 A JP H07173504A
- Authority
- JP
- Japan
- Prior art keywords
- die
- outer peripheral
- punch
- diameter portion
- compacting
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、薄肉円筒状の高密度
焼結金属部品を製造する場合に好適な圧粉成形用金型装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die apparatus for powder compacting suitable for producing a thin-walled cylindrical high-density sintered metal part.
【０００２】[0002]
【従来の技術】一般に、鉄系の焼結品は、圧粉成形で得
られる密度の上限が量産上７．３g ／cm3 であり、加圧
方向の中間部位の密度が低くなる傾向があるので、シリ
ンダライナのような薄肉円筒状の高密度焼結品を製造す
ることができない。これを説明すれば、粉体の成形密度
が大きくなるに従ってスプリングバック量が大きくなる
ために、成形後のノックアウト時に成形品とダイとの接
触圧が高くなり、ダイの摩耗を促進させるという問題が
ある。2. Description of the Related Art Generally, an iron-based sintered product has an upper limit of the density obtained by compaction molding of 7.3 g / cm 3 in mass production, and the density of the intermediate portion in the pressing direction tends to be low. Therefore, it is not possible to manufacture a thin-walled cylindrical high-density sintered product such as a cylinder liner. Explaining this, the spring back amount increases as the powder molding density increases, so the contact pressure between the molded product and the die during knockout after molding increases, and there is the problem of promoting die wear. is there.
【０００３】この問題を解決するために、ダイと成形品
との摩擦係数を小さくする必要が生じ、このため、潤滑
剤として混入されているステアリン酸亜鉛の量を増加さ
せる。In order to solve this problem, it is necessary to reduce the coefficient of friction between the die and the molded product, which increases the amount of zinc stearate mixed in as a lubricant.
【０００４】このステアリン酸亜鉛の混入量が増加する
ために、鉄系焼結品の密度は前記の如く７．３g ／cm3
が上限となっている。Since the amount of zinc stearate mixed in is increased, the density of the iron-based sintered product is 7.3 g / cm 3 as described above.
Is the upper limit.
【０００５】そこで、従来、薄肉円筒状の高密度焼結品
を製造する方法としては、特開平２−２８２４０５号公
報に記載されたものが開発されている。この方法は、粉
末冶金法で円筒状の焼結体を成形した後、加圧方向に向
って先細りの内孔を有するダイの内孔周壁と、軸方向へ
移動自在な棒状のマンドレルの外周面との間にまず前記
円筒状の焼結体を、次いで円筒状の加圧パンチを挿入
し、この加圧パンチにより前記焼結体をダイの内孔の先
細り側より押し出して塑性加工して７．３g ／cm3 以上
の高密度焼結品を得るものである。Therefore, as a method of manufacturing a thin-walled cylindrical high-density sintered product, a method described in Japanese Patent Laid-Open No. 2-282405 has been developed. This method consists of molding a cylindrical sintered body by powder metallurgy, and then forming the inner wall of the die, which has a tapered inner hole in the pressing direction, and the outer peripheral surface of a rod-shaped mandrel that is movable in the axial direction. First, the cylindrical sintered body and then the cylindrical pressure punch are inserted between the two, and the sintered body is extruded from the tapered side of the inner hole of the die and plastically worked. A high-density sintered product of 3 g / cm 3 or more is obtained.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の方法では、圧粉成形後、上記のような押出し塑性加
工を行うため、工程数が多くなって製造コストが高くな
るという不都合がある。However, in the above-mentioned conventional method, since the extrusion plastic working as described above is performed after compacting, there is a disadvantage that the number of steps is increased and the manufacturing cost is increased.
【０００７】この発明は上記課題を解決するためになし
たもので、その目的とするところは、金型にかじりを生
じることなく高密度の圧粉成形を可能とする圧粉成形用
金型装置を提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to provide a mold apparatus for powder compacting which enables high-density powder compaction without galling of the mold. To provide.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、ダイスと、該ダイスの内孔に進退自在に
滑合され、粉体を押圧成形する上パンチ及び下パンチと
を備え、前記内孔の周壁の上部を、前記上パンチが滑合
される大径部に形成し、該周壁の下部を、前記下パンチ
が滑合される小径部に形成し、該周壁の中間部を、前記
大径部と小径部を連続させるテーパ部に形成すると共
に、前記上パンチの下端部の外周部と前記下パンチの上
端部の外周部の少なくとも一方に環状の凹段部を形成し
たものである。In order to achieve the above object, the present invention provides a die and an upper punch and a lower punch which are slidably fitted in an inner hole of the die and which press-form a powder. An upper portion of a peripheral wall of the inner hole is formed in a large diameter portion in which the upper punch is slid, and a lower portion of the peripheral wall is formed in a small diameter portion in which the lower punch is slid, and an intermediate portion of the peripheral wall. A tapered portion that connects the large diameter portion and the small diameter portion to each other, and an annular concave step portion is formed on at least one of the outer peripheral portion of the lower end portion of the upper punch and the outer peripheral portion of the upper end portion of the lower punch. It was done.
【０００９】[0009]
【作用】上記構成によれば、圧粉成形時、ダイスの内孔
周壁の大径部，テーパ部及び小径部により成形品（圧粉
体）に大径部，テーパ部及び小径部を各々成形する。According to the above construction, at the time of compacting, the large diameter portion, the taper portion and the small diameter portion of the inner wall of the die are used to form the large diameter portion, the taper portion and the small diameter portion, respectively. To do.
【００１０】上パンチの下端部の外周部と下パンチの上
端部の外周部の少なくとも一方には環状の凹段部が形成
されているので、成形品の前記凹段部側の外周部は比較
的に低密度になる。従って、ノックアウト時の摩擦力は
小さくなる。また、テーパ部によって容易に成形品とダ
イとが離間する。Since an annular concave step portion is formed on at least one of the outer peripheral portion of the lower punch and the outer peripheral portion of the upper punch, the outer peripheral portion of the molded product on the concave step side is compared. Becomes low density. Therefore, the frictional force at the time of knocking out becomes small. Further, the tapered portion easily separates the molded product from the die.
【００１１】[0011]
【実施例】以下、本発明に係わる圧粉成形用金型装置の
実施例を図面を参照して詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a powder molding die apparatus according to the present invention will be described in detail below with reference to the drawings.
【００１２】図１は本発明の第一の実施例になる圧粉成
形用金型装置を示す縦断面図、図２（１），（２），
（３），（４）は同金型装置の粉体充填状態，粉体圧縮
状態，ノックアウト開始状態，ノックアウト完了状態を
示す断面図である。これらの図において１は下パンチ、
２はダイス、３は上パンチである。FIG. 1 is a vertical sectional view showing a mold apparatus for powder compacting according to a first embodiment of the present invention, FIGS. 2 (1), 2 (2),
(3) and (4) are cross-sectional views showing a powder filling state, a powder compression state, a knockout start state, and a knockout completion state of the mold device. In these figures, 1 is the lower punch,
2 is a die and 3 is an upper punch.
【００１３】前記下パンチ１は円筒状をなしていて、該
下パンチ１内には、下パンチ１の先端から上方に突出す
るコア１ａが取外し自在に嵌挿されている。The lower punch 1 has a cylindrical shape, and a core 1a protruding upward from the tip of the lower punch 1 is detachably fitted in the lower punch 1.
【００１４】また、前記ダイス２は内孔２ａを有してい
て、該内孔２ａの周壁の上部は、前記上パンチ３が進退
自在に滑合される大径部２ａ1 に形成され、該周壁の下
部は、前記下パンチ１が進退自在に滑合される小径部２
ａ2 に形成され、該周壁の中間部は、前記大径部２ａ1
と小径部２ａ2 を連続させるテーパ部２ａ3 に形成され
ている。The die 2 has an inner hole 2a, and the upper part of the peripheral wall of the inner hole 2a is formed into a large diameter portion 2a 1 into which the upper punch 3 is slidably movable. The lower part of the peripheral wall has a small-diameter portion 2 into which the lower punch 1 is slidably fitted in and out.
a 2 and the middle portion of the peripheral wall is the large diameter portion 2 a 1
And a taper portion 2a 3 that connects the small diameter portion 2a 2 to each other.
【００１５】このようなダイス２は図外のアクチュエー
タにより前記下パンチ１に対して上下動自在に設けられ
ている。The die 2 is vertically movable with respect to the lower punch 1 by an actuator (not shown).
【００１６】更に、前記上パンチ３は前記下パンチ１の
コア１ａに滑合される円筒状をなしていて、該上パンチ
３の下端部の外周部には、環状の凹段部３ａが形成され
ている。この上パンチ３は図外のアクチュエータにより
下パンチ１に対して上下動自在に設けられている。Further, the upper punch 3 has a cylindrical shape that is slidably fitted on the core 1a of the lower punch 1, and an annular concave step portion 3a is formed on the outer peripheral portion of the lower end portion of the upper punch 3. Has been done. The upper punch 3 is vertically movable with respect to the lower punch 1 by an actuator (not shown).
【００１７】上記構成において、まず、図２（１）に示
すように、ダイス２の上面が下パンチ１のコア１ａの上
端面とが同一レベルとなっている状態で、下パンチ１の
コア１ａの外周面とダイス２の内孔２ａの周壁との間に
粉体Ｍを充填する。In the above structure, first, as shown in FIG. 2A, the core 1a of the lower punch 1 is in a state where the upper surface of the die 2 is at the same level as the upper end surface of the core 1a of the lower punch 1. The powder M is filled between the outer peripheral surface of and the peripheral wall of the inner hole 2a of the die 2.
【００１８】次に、図２（２）に示すように、下パンチ
１のコア１ａの外周面とダイス２の大径部２ａ1 との間
に上パンチ３の下端部を滑合・下降させ、ダイス２の大
径部２ａ1 を少し残した位置で停止させる。これにより
前記粉体Ｍを押圧成形して、成形品Ｗ（圧粉体）を製造
する。Next, as shown in FIG. 2 (2), the lower end of the upper punch 3 is slid and lowered between the outer peripheral surface of the core 1a of the lower punch 1 and the large diameter portion 2a 1 of the die 2. , Stop at a position where the large diameter portion 2a 1 of the die 2 is left a little. In this way, the powder M is press-molded to manufacture a molded product W (compacted powder).
【００１９】前記成形品Ｗには、ダイス２の内孔２ａの
周壁に形成した大径部２ａ1 ，テーパ部２ａ3 及び小径
部２ａ2 により大径部Ｗａ1 ，テーパ部Ｗａ3 及び小径
部Ｗａ2 が各々成形される。前記大径部Ｗａ1 の外周部
の上部には、上パンチ３の下端部に設けた凹段部３ａ1
により環状の突条Ｗｂ1 が形成される。The molded product W includes a large diameter portion Wa 1 , a tapered portion Wa 3 and a small diameter portion due to the large diameter portion 2a 1 , the tapered portion 2a 3 and the small diameter portion 2a 2 formed on the peripheral wall of the inner hole 2a of the die 2. Wa 2 is molded respectively. At the upper portion of the outer peripheral portion of the large diameter portion Wa 1 , a concave step portion 3a 1 provided at the lower end portion of the upper punch 3 is provided.
As a result, an annular ridge Wb 1 is formed.
【００２０】上記圧粉成形の後、まず図２（３）に示す
ように上パンチ３を上昇させ、次いで、同図（４）に示
すように下パンチ１に対してダイス２を下降させて、ノ
ックアウトを行う。このノックアウト時、まず成形品Ｗ
のテーパ部Ｗａ3 がダイス２のテーパ部２ａ3 から離間
し、次いで成形品Ｗの小径部Ｗａ2 がダイス２のテーパ
部２ａ3 に達して小径部２ａ2 から離間し、しかる後、
成形品Ｗの大径部Ｗａ1 がダイス２の大径部２ａ1 から
離間することで、ノックアウトが完了する。After the above powder compaction, the upper punch 3 is first raised as shown in FIG. 2 (3), and then the die 2 is lowered with respect to the lower punch 1 as shown in FIG. 2 (4). , Do a knockout. At the time of this knockout, first the molded product W
Taper portion Wa 3 of the die 2 is separated from the taper portion 2a 3 of the die 2, then the small diameter portion Wa 2 of the molded product W reaches the taper portion 2a 3 of the die 2 and is separated from the small diameter portion 2a 2 , and thereafter,
Knockout is completed when the large diameter portion Wa 1 of the molded product W is separated from the large diameter portion 2a 1 of the die 2.
【００２１】ところで、高密度ほど成形品Ｗのスプリン
グバック量が大きく、成形品Ｗはダイス２の内孔２ａの
周壁に強く圧接されるが、この成形品Ｗにはテーパ部Ｗ
ａ3を設けているので、ノックアウト時、上記スプリン
グバック量の大きさから、成形品Ｗのテーパ部Ｗａ3 と
ダイス２のテーパ部２ａ3 とはスムーズに離間する。従
って、ダイス２のテーパ部２ａ3 にかじりを生じない。By the way, the higher the density, the larger the spring back amount of the molded product W, and the molded product W is strongly pressed against the peripheral wall of the inner hole 2a of the die 2, but the molded product W has a tapered portion W.
Since a 3 is provided, at the time of knocking out, the tapered portion Wa 3 of the molded product W and the tapered portion 2a 3 of the die 2 are smoothly separated from each other due to the magnitude of the springback amount. Therefore, galling does not occur in the tapered portion 2a 3 of the die 2.
【００２２】また、成形品Ｗの大径部Ｗａ1 の外周部の
上部に環状の突条Ｗｂ1 を形成することで、該環状の突
条Ｗｂ1 及び前記大径部Ｗａ1 の外周部とを低密度にし
てスプリングバック量を小さくしているので、ノックア
ウト時、成形品Ｗの環状の突条Ｗｂ1 及び大径部Ｗａ1
とダイス２の大径部２ａ1 との間の摩擦力は小さくな
る。このため、成形品Ｗの環状の突条Ｗｂ1 及び大径部
Ｗａ1 はダイス２の大径部２ａ1 にスムーズに摺動す
る。従って、ダイス２の大径部２ａ1 にかじりを生じな
く、また摩擦による発熱もない。Further, by forming the ridge Wb 1 ring on top of the outer peripheral portion of the large-diameter portion Wa 1 of the molded article W, the ring-like lip Wb 1 and the outer peripheral portion of the large-diameter portion Wa 1 Has a low density to reduce the amount of spring back, so at the time of knockout, the annular protrusion Wb 1 and large diameter portion Wa 1 of the molded product W are
The frictional force between the large diameter portion 2a 1 of the die 2 and the die 2 becomes small. Therefore, the annular protrusion Wb 1 and the large diameter portion Wa 1 of the molded product W slide smoothly on the large diameter portion 2a 1 of the die 2. Therefore, galling does not occur in the large diameter portion 2a 1 of the die 2, and heat generation due to friction does not occur.
【００２３】更に、成形品Ｗの小径部Ｗａ2 は大径部Ｗ
ａ1 に比べてノックアウト長さが短いため、ダイス２の
小径部２ａ2 との摩擦は少なくなっている。Further, the small diameter portion Wa 2 of the molded product W is the large diameter portion W
Since the knockout length is shorter than that of a 1 , the friction with the small diameter portion 2a 2 of the die 2 is small.
【００２４】次に本発明に係わる圧粉成形用金型装置の
第二の実施例を図３に基づき説明するが第一の実施例と
同一の構成要件に関しては同じ符号を付し説明を省略す
る。Next, a second embodiment of the mold apparatus for powder compacting according to the present invention will be described with reference to FIG. 3, but the same constituents as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. To do.
【００２５】図３は本発明の第二の実施例になる圧粉成
形用金型装置の粉体圧縮状態を示す縦断面図であるが、
図３において上パンチ３の下端部の外周部の他に、下パ
ンチ１の上端部の外周部にも環状の凹段部３ａ2 が形成
されている。このため、成型品Ｗには大径部Ｗａ1 側だ
けではなく小径部Ｗａ2 側にも環状の突条Ｗｂ2 が形成
されることとなり、成型品Ｗの環状の突条Ｗｂ2 及び前
記小径部Ｗａ2 の外周部とを低密度にしてスプリングバ
ック量を小さくしている。このため、ノックアウト時、
成形品Ｗの環状の突条Ｗｂ2 及び小径部Ｗａ2 とダイス
２の小径部２ａ2 との間の摩擦力を小さくしており、成
形品Ｗの環状の突条Ｗｂ2 及び小径部Ｗａ2 はダイス２
の小径部２ａ2 にスムーズに摺動する。従って、成形品
Ｗの小径部Ｗａ2 とダイス２の小径部２ａ2 のかじりの
発生をさらに確実に防止することができる。FIG. 3 is a vertical cross-sectional view showing a powder compression state of the powder compacting mold apparatus according to the second embodiment of the present invention.
In FIG. 3, in addition to the outer peripheral portion of the lower end portion of the upper punch 3, an annular concave step portion 3a 2 is formed on the outer peripheral portion of the upper end portion of the lower punch 1. Therefore, the annular protrusion Wb 2 is formed not only on the large diameter portion Wa 1 side but also on the small diameter portion Wa 2 side of the molded product W, and the annular protrusion Wb 2 and the small diameter portion of the molded product W are formed. The outer peripheral portion of the portion Wa 2 and the outer peripheral portion are made low in density to reduce the springback amount. Therefore, when knocking out,
And to reduce the frictional forces between the small-diameter portion 2a 2 of the annular ridges Wb 2 and the small-diameter portion Wa 2 and the die 2 of the shaped article W, ridges Wb 2 annular molded article W and the small-diameter portion Wa 2 Is a dice 2
It smoothly slides on the small-diameter portion 2a 2 of. Therefore, it is possible to more reliably prevent the galling of the small diameter portion Wa 2 of the molded product W and the small diameter portion 2a 2 of the die 2.
【００２６】なお、上記２つの実施例では上パンチ３の
みに凹段部３ａ1 を形成した場合と、上パンチ３と下パ
ンチ１の両方に凹段部３ａ1 ，３ａ2 を形成した場合に
ついて詳述したが、下パンチ１のみに凹段部３ａ2 を設
け、成型品Ｗの小径部Ｗａ2に環状の突条Ｗｂ2 を形成
した場合においても、この環状の突条Ｗｂ2 および小径
部Ｗａ2 の外周部を低密度にし、成形品Ｗのダイス２と
の離間時の摩擦を減少させることができる。In the above two embodiments, the case where the concave step portion 3a 1 is formed only in the upper punch 3 and the case where the concave step portions 3a 1 and 3a 2 are formed in both the upper punch 3 and the lower punch 1 are described. As described in detail, even when the concave step portion 3a 2 is provided only on the lower punch 1 and the annular projection Wb 2 is formed on the small diameter portion Wa 2 of the molded product W, the annular projection Wb 2 and the small diameter portion are formed. It is possible to reduce the density of the outer peripheral portion of Wa 2 and reduce the friction when the molded product W is separated from the die 2.
【００２７】[0027]
【発明の効果】以上の通り、この発明は、ダイスと、該
ダイスの内孔に進退自在に滑合され、粉体を押圧成形す
る上パンチ及び下パンチとを備え、前記内孔の周壁の上
部を、前記上パンチが滑合される大径部に形成し、該周
壁の下部を、前記下パンチが滑合される小径部に形成
し、該周壁の中間部を、前記大径部と小径部を連続させ
るテーパ部に形成すると共に、前記上パンチの下端部の
外周部に環状の凹段部を形成したため、ダイスの内孔周
壁の大径部，テーパ部及び小径部により成形品に大径
部，テーパ部及び小径部を各々成形できると共に、上パ
ンチの下端部の外周部と下パンチの上端部の外周部の少
なくとも一方には環状の凹段部が形成されているので、
成形品の前記凹段部側の外周部は比較的に低密度にな
る。このため、ノックアウト時、前記外周部とダイスと
の間の摩擦力を小さくすることができ、またテーパ部に
よってスプリングバック量の大きさを利用して容易に成
形品とダイとを離間させることができ、更に成形品の小
径部のノックアウト長さを短くできるので、ノックアウ
トを確実に行える。従って、従来、圧粉成形で得られる
密度の上限が量産上７．３g ／cm3 に制限される鉄系の
粉体において、成形品を高密度化するために潤滑剤の混
入量を少くしても、ダイスの内孔周壁にかじり等を生じ
ることなく、成形品を取り出すことができるので、高密
度の圧粉成形が可能となり、従来のように圧粉成形後に
更に押出し塑性加工を行う必要がなく、工程数の削減と
製造コストの低減を図ることができる。また、ダイスの
内孔周壁にかじり等を生じないので、金型装置の寿命を
長くすることもできる。As described above, the present invention is provided with a die and an upper punch and a lower punch that are slidably fitted in the inner hole of the die and press-mold the powder. The upper portion is formed in a large diameter portion with which the upper punch is slid, the lower portion of the peripheral wall is formed with a small diameter portion in which the lower punch is slid, and the middle portion of the peripheral wall is formed with the large diameter portion. Since the small-diameter part is formed as a continuous taper part and an annular concave step part is formed on the outer peripheral part of the lower end part of the upper punch, the large-diameter part, the tapered part and the small-diameter part of the inner wall of the die form a molded product. Since a large diameter portion, a taper portion and a small diameter portion can be formed respectively, and at least one of the outer peripheral portion of the lower punch and the outer peripheral portion of the upper punch has an annular concave step,
The outer peripheral portion of the molded product on the side of the concave step portion has a relatively low density. Therefore, at the time of knocking out, the frictional force between the outer peripheral portion and the die can be reduced, and the taper portion can be used to easily separate the molded product from the die by utilizing the magnitude of the springback amount. Moreover, since the knockout length of the small diameter part of the molded product can be shortened, the knockout can be reliably performed. Therefore, in the conventional iron-based powders whose upper limit of the density obtained by compaction molding is limited to 7.3 g / cm 3 in terms of mass production, the amount of lubricant mixed is reduced in order to densify the molded product. However, since the molded product can be taken out without causing galling on the inner wall of the die, it is possible to perform high-density compaction molding, and it is necessary to perform further extrusion plastic working after compaction molding as in the past. Therefore, it is possible to reduce the number of steps and the manufacturing cost. Further, since no galling occurs on the inner wall of the inner hole of the die, the life of the mold device can be extended.
【図１】本発明の第一の実施例になる圧粉成形用金型装
置を示す縦断面図である。FIG. 1 is a vertical cross-sectional view showing a mold apparatus for powder compacting according to a first embodiment of the present invention.
【図２】（１） 同金型装置の粉体充填状態を示す縦断
面図である。 （２） 同金型装置の粉体圧縮状態を示す縦断面図であ
る。 （３） 同金型装置のノックアウト開始状態を示す断面
図である。 （４） 同金型装置のノックアウト完了状態を示す断面
図である。FIG. 2 (1) is a vertical sectional view showing a powder filling state of the mold apparatus. (2) It is a longitudinal cross-sectional view showing a powder compression state of the mold apparatus. (3) It is sectional drawing which shows the knockout start state of the same metal mold | die apparatus. (4) It is sectional drawing which shows the knockout completion state of the same metal mold | die apparatus.
【図３】本発明の第二の実施例になる圧粉成形用金型装
置の粉体圧縮状態を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing a powder compression state of a powder compacting die device according to a second embodiment of the present invention.
１ 下パンチ ２ ダイス ２ａ 内孔 ２ａ1 大径部 ２ａ2 小径部 ２ａ3 テーパ部 ３ 上パンチ ３ａ1 凹段部1 Lower punch 2 Die 2a Inner hole 2a 1 Large diameter part 2a 2 Small diameter part 2a 3 Tapered part 3 Upper punch 3a 1 Recessed step part
Claims (1)
滑合され、粉体を押圧成形する上パンチ及び下パンチと
を備え、前記内孔の周壁の上部を、前記上パンチが滑合
される大径部に形成し、該周壁の下部を、前記下パンチ
が滑合される小径部に形成し、該周壁の中間部を、前記
大径部と小径部を連続させるテーパ部に形成すると共
に、前記上パンチの下端部の外周部と前記下パンチの上
端部の外周部の少なくとも一方に環状の凹段部を形成し
たことを特徴とする圧粉成形用金型装置。1. A die, and an upper punch and a lower punch that are slidably fitted in an inner hole of the die and press-mold the powder. The upper punch slides on an upper portion of a peripheral wall of the inner hole. The lower part of the peripheral wall is formed into a small diameter part into which the lower punch is slid, and the middle part of the peripheral wall is formed into a taper part that connects the large diameter part and the small diameter part. In addition to forming, an annular concave step portion is formed on at least one of an outer peripheral portion of a lower end portion of the upper punch and an outer peripheral portion of an upper end portion of the lower punch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04064394A JP3347451B2 (en) | 1993-10-27 | 1994-02-16 | Molding apparatus for green compaction and molding method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29127193 | 1993-10-27 | ||
| JP5-291271 | 1993-10-27 | ||
| JP04064394A JP3347451B2 (en) | 1993-10-27 | 1994-02-16 | Molding apparatus for green compaction and molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07173504A true JPH07173504A (en) | 1995-07-11 |
| JP3347451B2 JP3347451B2 (en) | 2002-11-20 |
Family
ID=26380131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04064394A Expired - Fee Related JP3347451B2 (en) | 1993-10-27 | 1994-02-16 | Molding apparatus for green compaction and molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3347451B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11117002A (en) * | 1997-10-14 | 1999-04-27 | Unisia Jecs Corp | Compact raw material of metallic powder and its production |
| WO2000062960A1 (en) * | 1999-04-16 | 2000-10-26 | Unisia Jecs Corporation | Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof |
| JP2000303106A (en) * | 1999-04-16 | 2000-10-31 | Unisia Jecs Corp | Repressed compact of metallic-powder blank, sintered compact obtained from the repressed compact, and their manufacture |
| JP2000355726A (en) * | 1999-04-16 | 2000-12-26 | Unisia Jecs Corp | Alloy steel powder compacting stock and alloy steel powder worked body |
| JP2005305457A (en) * | 2004-04-16 | 2005-11-04 | Nissan Motor Co Ltd | Powder molding die and powder molding method |
| CN100354994C (en) * | 2001-01-17 | 2007-12-12 | 株式会社新王磁材 | Ring-like magnet forming apparatus and metallic mold used therefor, and ring-like magnet forming method |
| JP2012248899A (en) * | 2011-03-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Outer core manufacturing method, outer core, and reactor |
| JP2013000819A (en) * | 2011-06-14 | 2013-01-07 | Kyocera Corp | Blank for drilling, and drill |
| JP2013027896A (en) * | 2011-07-27 | 2013-02-07 | Sumitomo Electric Ind Ltd | Method of manufacturing green compact |
| JP2013030756A (en) * | 2012-06-01 | 2013-02-07 | Sumitomo Electric Ind Ltd | Green compact |
| JP2014100735A (en) * | 2012-11-22 | 2014-06-05 | Toyota Motor Corp | Mold for powder molding and method of producing powder molding |
| US9251946B2 (en) | 2011-07-27 | 2016-02-02 | Sumitomo Electric Industries, Ltd. | Compact |
| JP2020108323A (en) * | 2018-12-28 | 2020-07-09 | 住友電気工業株式会社 | Core, stator, and rotary electric machine |
-
1994
- 1994-02-16 JP JP04064394A patent/JP3347451B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159266A (en) * | 1997-10-14 | 2000-12-12 | Unisia Jecs Corporation | Sintered powder metal bodies and process for producing the same |
| JPH11117002A (en) * | 1997-10-14 | 1999-04-27 | Unisia Jecs Corp | Compact raw material of metallic powder and its production |
| WO2000062960A1 (en) * | 1999-04-16 | 2000-10-26 | Unisia Jecs Corporation | Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof |
| JP2000303106A (en) * | 1999-04-16 | 2000-10-31 | Unisia Jecs Corp | Repressed compact of metallic-powder blank, sintered compact obtained from the repressed compact, and their manufacture |
| JP2000355726A (en) * | 1999-04-16 | 2000-12-26 | Unisia Jecs Corp | Alloy steel powder compacting stock and alloy steel powder worked body |
| US6905530B2 (en) | 1999-04-16 | 2005-06-14 | Unisia Jecs Corporation | Metallic powder-molded body, re-compacted body of the molded body, sintered body produced from the re-compacted body, and processes for production thereof |
| CN100354994C (en) * | 2001-01-17 | 2007-12-12 | 株式会社新王磁材 | Ring-like magnet forming apparatus and metallic mold used therefor, and ring-like magnet forming method |
| JP2005305457A (en) * | 2004-04-16 | 2005-11-04 | Nissan Motor Co Ltd | Powder molding die and powder molding method |
| JP2012248899A (en) * | 2011-03-30 | 2012-12-13 | Sumitomo Electric Ind Ltd | Outer core manufacturing method, outer core, and reactor |
| JP2013000819A (en) * | 2011-06-14 | 2013-01-07 | Kyocera Corp | Blank for drilling, and drill |
| JP2013027896A (en) * | 2011-07-27 | 2013-02-07 | Sumitomo Electric Ind Ltd | Method of manufacturing green compact |
| US9251946B2 (en) | 2011-07-27 | 2016-02-02 | Sumitomo Electric Industries, Ltd. | Compact |
| JP2013030756A (en) * | 2012-06-01 | 2013-02-07 | Sumitomo Electric Ind Ltd | Green compact |
| JP2014100735A (en) * | 2012-11-22 | 2014-06-05 | Toyota Motor Corp | Mold for powder molding and method of producing powder molding |
| JP2020108323A (en) * | 2018-12-28 | 2020-07-09 | 住友電気工業株式会社 | Core, stator, and rotary electric machine |
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| JP3347451B2 (en) | 2002-11-20 |
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