JPH02108497A - Uniform packing device for powder molding - Google Patents

Uniform packing device for powder molding

Info

Publication number
JPH02108497A
JPH02108497A JP25858988A JP25858988A JPH02108497A JP H02108497 A JPH02108497 A JP H02108497A JP 25858988 A JP25858988 A JP 25858988A JP 25858988 A JP25858988 A JP 25858988A JP H02108497 A JPH02108497 A JP H02108497A
Authority
JP
Japan
Prior art keywords
shoe box
powder
raw material
die
die cavity
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
JP25858988A
Other languages
Japanese (ja)
Other versions
JP2638139B2 (en
Inventor
Koji Tominaga
浩司 富永
Minoru Osaki
大崎 稔
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.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal 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 Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP63258589A priority Critical patent/JP2638139B2/en
Publication of JPH02108497A publication Critical patent/JPH02108497A/en
Application granted granted Critical
Publication of JP2638139B2 publication Critical patent/JP2638139B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30Feeding material to presses
    • B30B15/302Feeding material in particulate or plastic state to moulding presses
    • B30B15/304Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Powder Metallurgy (AREA)

Abstract

PURPOSE:To uniformly pack raw material powder into the cavity of a die by forming a shoe box which moves back and forth along the front surface of the die into a specific structure at the time of packing a powder raw material into the cavity of the die and pressurizing the material to produce a green compact. CONSTITUTION:A pendent member 13 is provided to the front surface in the shoe box 10 and a limiting member 14 to limit the flow rate of the raw material powder is provided to the lower part of the raw material feed port of the shoe box at the time of supplying and packing the raw material powder 8 into the die cavity 6 in the state of mounting a lower punch 4 and a core rod 5 into the through-hole of the die by means of the shoe box 10 which moves back and forth on the surface of the die. The limiting member 14 limits the area to close the aperture of the cavity 6 to 2 to 3% of the aperture. The packing density of the raw material powder in the cavity by the advance and retreat of the shoe box 10 is uniformized by the presence of these two limiting members 13, 14. The sintered body having no dimensional change in case of sintering the green compact molding is thus obtd.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ダイス面に沿って往復移動するシューボック
スによって、ダイスキャビティ内に粉末を均一に充填す
るための粉末成形における均一充填装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a uniform filling device for uniformly filling powder into a die cavity using a shoe box that reciprocates along the die surface.

〔従来の技術〕[Conventional technology]

従来、例えば、第3図及び第4図に示すようなリング状
の圧粉体1.2を圧縮成形する場合には、第5菌に示す
ように、ダイス3の透孔内に下パンチ4及びコアロッド
5を装着した状態のダイスキャビティ(空隙)6内に、
シューボックス7を前進、後退させることにより、原料
粉末8を供給した後に、上パンチを下降させて、加圧圧
縮して成形している。
Conventionally, for example, when compression molding a ring-shaped powder compact 1.2 as shown in FIGS. And inside the die cavity (gap) 6 with the core rod 5 attached,
After the raw material powder 8 is supplied by moving the shoe box 7 forward and backward, the upper punch is lowered to perform compression and molding.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところで、上記従来の粉末充填装置においては、シュー
ボックス7の前進、後退により、ダイスキャビティ6の
b部の方がa部に比べて充填時間が長い上に、シューボ
ックス7内に原料粉末8を供給する投入口9がシューボ
ックス7の後部に設けられているために、b部の方が原
料粉末8が充填され易い。従って、加圧成形された圧粉
体1.2にあっては、a部よりb部の方が密度が高くな
り、密度が均一にならず、あるいは、スプリングバック
の影響で圧粉体1.2の内径の真円度、及び内径に対す
る端面の直角度、端面の平行度そして焼結後の寸法変化
率に悪影響を及ぼしていた。
By the way, in the above conventional powder filling device, due to the forward and backward movement of the shoe box 7, the filling time is longer in the part b of the die cavity 6 than in the part a, and the raw material powder 8 is not filled into the shoe box 7. Since the supply inlet 9 is provided at the rear of the shoe box 7, it is easier to fill the raw material powder 8 into the part b. Therefore, in the pressure-formed green compact 1.2, the density is higher in the b part than in the a part, and the density is not uniform, or due to the influence of springback. The roundness of the inner diameter of No. 2, the perpendicularity of the end face to the inner diameter, the parallelism of the end face, and the dimensional change rate after sintering were adversely affected.

本発明は、上記事情に鑑みてなされたもので、その目的
とするところは、ダイスキャビティに粉末を均一に充填
することができ、圧粉体の密度を均一に保持することが
できると共に、寸法精度の向上を図ることができる粉末
成形における均一充填装置を提供することにある。
The present invention has been made in view of the above-mentioned circumstances, and its purpose is to be able to uniformly fill a die cavity with powder, maintain a uniform density of the green compact, and An object of the present invention is to provide a uniform filling device for powder molding that can improve accuracy.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために、本発明の粉末成形における
均一充填装置は、シューボックスの一内部の上面に、こ
のシューボックスの前部に流れる粉末の量を減らす垂下
部材を設けたものである。また、この垂下部材に加えて
、シューボックスの投入口の下部に、粉末の流量を制限
する制限部材を設けたものである。さらに、上記シュー
ボックスの前進端位置において、制限部材がダイスキャ
ビティの一部を閉塞するように構成したことを特徴とす
る。
In order to achieve the above object, the uniform filling device for powder molding of the present invention is provided with a hanging member on the upper surface inside one of the shoe boxes to reduce the amount of powder flowing to the front part of the shoe box. In addition to this hanging member, a restriction member for restricting the flow rate of powder is provided below the inlet of the shoe box. Furthermore, the present invention is characterized in that the limiting member partially closes the die cavity at the forward end position of the shoe box.

さらにまた、上記制限部材がダイスキャビティを閉塞す
る面積をこのダイスキャビティの開口面積の2〜3%に
設定したものである。
Furthermore, the area where the limiting member closes the die cavity is set to 2 to 3% of the opening area of the die cavity.

〔作 用〕[For production]

本発明の粉末成形における均一充填装置にあっては、垂
下部材によって、シューボックスの前部に流れる粉末の
量を減らして、シューボックス内の粉末の移動を滑らか
にし、ダイスキャビティの前部側に粉末が入り易くする
ことにより、粉末の均一な充填を行う。
In the uniform filling device for powder molding of the present invention, the hanging member reduces the amount of powder flowing to the front of the shoe box, smoothes the movement of powder in the shoe box, and allows the powder to flow to the front of the die cavity. Uniform filling of the powder is achieved by making it easier for the powder to enter.

また、制限部材によって、投入口を介して勢いよ(流れ
てくる粉末の流れを制限して、粉末がダイスキャビティ
の後部側に集中するのを避けることにより、ダイスキャ
ビティ各部の粉末の充填の均一化を図る。
In addition, the restricting member restricts the flow of the powder flowing through the inlet and prevents the powder from concentrating on the rear side of the die cavity, ensuring uniform filling of the powder in each part of the die cavity. We aim to make this possible.

さらに、シューボックスの前進端において、上記制限部
材かダイスキャビティの後部側を閉塞するようにしたこ
とにより、−層、ダイスキャビティの後部側の粉末の充
填を制限して、ダイスキャビティ内への粉末の充填が均
一に行われるようにする。
Furthermore, at the forward end of the shoe box, the limiting member closes the rear side of the die cavity, thereby restricting the filling of the powder at the rear side of the die cavity, thereby restricting the powder from entering the die cavity. Ensure that the filling is done evenly.

さらにまた、制限部材が閉塞する面積をダイスキャビテ
ィの開口面積の2〜3%に限定した理由は、開口面積の
2%より小さい場合には、a部よりb部の方が充填され
易く密度が高(なる傾向があるためである。開口面積の
3%を越えた場合には、上記とは逆に、a部の方が密度
が高くなり、均一に充填されないためである。
Furthermore, the reason why the area blocked by the restricting member is limited to 2 to 3% of the opening area of the die cavity is that when the area is smaller than 2% of the opening area, part b is more easily filled than part a, and the density decreases. This is because the density tends to be higher than 3% of the opening area, contrary to the above, the density of the part a becomes higher and the filling is not uniform.

〔実施例〕〔Example〕

以下、第1図と第2図に基づいて本発明の一実施例を説
明する。なお、本実施例において第5図に示す従来例と
同様の構成の部分については同符号を付して説明を省略
する。
Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2. In this embodiment, the same reference numerals are given to the parts having the same configuration as those of the conventional example shown in FIG. 5, and the explanation thereof will be omitted.

第1図において符号10は、前後に(図において左右方
向に)往復移動するシューボックスであり、このシュー
ボックスIOの後上部には、原料粉末8の投入口11が
、かつシューボックス10の下面部には開口12がそれ
ぞれ形成されている。
In FIG. 1, reference numeral 10 denotes a shoe box that reciprocates back and forth (in the left-right direction in the figure). At the rear upper part of this shoe box IO, there is an inlet 11 for the raw material powder 8, and on the bottom surface of the shoe box 10. An opening 12 is formed in each portion.

そして、上記シューボックスlOの前進端において、上
記コアロッド5の上方に、該コアロッド5の外径と略等
しい厚さを有する垂下部材13が上記シューボックス1
0の内部の上面から垂設されており、この垂下部材13
の下面の、上記ダイス3の上面からの高さが調整できる
ように、垂下部材13はシューボックスlOに上下調整
可能に取付けられている。また、上記シューボックスl
Oの投入口11の下方には、制限部材14が設けられて
おり、この制限部材14の上部は、上記投入口2の下部
をふさぐように山形に盛り上がって形成されている。そ
して、上記シューボックスIOの前進端において、上記
制限部材14の前端部が、第2図に示すように、ダイス
キャビティ6の後部を閉塞するように構成されており、
この制限部材14がダイスキャビティ6を閉塞する面積
は、ダイスキャビティ6の開口面積の2〜3%に設定さ
れている。
At the forward end of the shoe box IO, a hanging member 13 having a thickness substantially equal to the outer diameter of the core rod 5 is disposed above the core rod 5.
0, and this hanging member 13
The hanging member 13 is attached to the shoe box 10 so as to be vertically adjustable so that the height of the lower surface of the die 3 from the upper surface of the die 3 can be adjusted. In addition, the above shoe box l
A restricting member 14 is provided below the O inlet 11, and the upper part of the restricting member 14 is formed in a raised mountain shape so as to block the lower part of the inlet 2. At the forward end of the shoe box IO, the front end of the limiting member 14 is configured to close the rear part of the die cavity 6, as shown in FIG.
The area in which the restricting member 14 closes the die cavity 6 is set to 2 to 3% of the opening area of the die cavity 6.

上記のように構成された均一充填装置にあっては、従来
同様、ダイスキャビティ6の上方から退避している状態
のシューボックス10を、第1図に示すように、ダイス
キャビティ6の上方位置まで前進させ、ダイスキャビテ
ィ6内に原料粉末8を充填した後、元の位置に戻す。
In the uniform filling device configured as described above, the shoe box 10, which has been retracted from above the die cavity 6, is moved to a position above the die cavity 6, as shown in FIG. After moving it forward and filling the raw material powder 8 into the die cavity 6, it returns it to its original position.

この場合、没入口11からンユーボックスIO内に投入
された原料粉末8は、制限部材14の上方を通った後、
制限部材14と垂下部材13との間を流下し、スムーズ
にダイスキャビティ6内に充填される。ここにおいて、
垂下部材13は、余分の原料粉末8がシューボックスl
Oの前部側に供給されて原料粉末8の円滑な流れが阻害
されるのを抑制する働きを有しており、この垂下部材1
3の下面のダイス而からの高さに応じてシューボックス
lOの前部側に供給される原料粉末8の量が調整される
。また、上記制限部材14によって、投入口11を通っ
て勢いよ(投下されてきた原料粉末8の勢いを抑えると
共に、原料粉末8の流量を制限することにより、一定量
の原料粉末8が所定の流速で流下するから、ダイスキャ
ビティ6の後部側(b部)に原料粉末8が集中的に供給
されるのが防止され、ダイスキャビティ6内の均一充填
が図られる。さらに、ダイスキャビティ6の後部側(b
部)を制限部材14の前端部がさえぎることにより、ダ
イスキャビティ6のa部とb部との充填のバランスがと
れ、−層、均一充填を図ることができる。
In this case, the raw material powder 8 introduced into the Nyu-box IO from the immersion port 11 passes above the restriction member 14, and then
It flows down between the restriction member 14 and the hanging member 13 and is smoothly filled into the die cavity 6. put it here,
The hanging member 13 is arranged so that the excess raw material powder 8 is stored in a shoe box l.
This hanging member 1 has the function of suppressing the smooth flow of the raw material powder 8 that is supplied to the front side of the O.
The amount of raw material powder 8 supplied to the front side of the shoe box IO is adjusted according to the height of the lower surface of the shoe box 3 from the die. In addition, the restriction member 14 suppresses the momentum of the raw material powder 8 that has been dropped through the inlet 11 and limits the flow rate of the raw material powder 8, so that a certain amount of the raw material powder 8 can be delivered to a predetermined amount. Since the raw material powder 8 flows down at the flow velocity, it is prevented from being intensively supplied to the rear side (section b) of the die cavity 6, and the inside of the die cavity 6 is uniformly filled. side (b
By blocking the front end portion of the limiting member 14, the filling of portions a and b of the die cavity 6 can be balanced, and uniform filling can be achieved.

〔発萌の効果〕[Effect of sprouting]

以上説明したように、本発明は、シューボックス内に設
けた垂下部材あるいは制限部材及びこの制限部材とダイ
スキャビティとの位置関係ニヨって、シューボックス内
の粉末の流れに変化をもたせ、また、シューボックス内
の粉末の量を制限することにより、ダイスキャビティの
前部、後部の充填を均一化でき、従って、圧粉体の内径
の真円度、内径に対する端面の直角度等を大幅に向上さ
せることができる上に、密度を均一にすることができる
ことにより、焼結時の寸法変化率を改善することができ
る。
As explained above, the present invention changes the flow of powder in the shoe box by changing the hanging member or restricting member provided in the shoe box and the positional relationship between the restricting member and the die cavity. By limiting the amount of powder in the shoe box, the front and rear parts of the die cavity can be uniformly filled, thereby greatly improving the roundness of the inner diameter of the powder compact and the perpendicularity of the end face to the inner diameter. In addition, by making the density uniform, the dimensional change rate during sintering can be improved.

【図面の簡単な説明】[Brief explanation of drawings]

第1図と第2図は本発明の一実施例を示すもので、第1
図は断面図、第2図はダイスキャビティと制限部材との
関係を説明する説明図、第3図は圧粉体の一例を示す斜
視図、第4図は圧粉体の他の一例を示す斜視図、第5図
は従来の粉末充填装置の断面図である。 第1図 6・・・・・・ダイスキャビティ、8・・・・・・原料
粉末、10・・・・・・シューボックス、11・・・・
・・投入口、12・・・・・開口(下部開口)、13・
・・・・・垂下部材、14・・・・・・制限部材。 第2図
Figures 1 and 2 show one embodiment of the present invention.
The figure is a sectional view, FIG. 2 is an explanatory diagram illustrating the relationship between the die cavity and the limiting member, FIG. 3 is a perspective view showing an example of a compact, and FIG. 4 is another example of a compact. The perspective view and FIG. 5 are cross-sectional views of a conventional powder filling device. Fig. 1 6...Die cavity, 8...Raw material powder, 10...Shoe box, 11...
...Input port, 12...Opening (lower opening), 13.
...Descent member, 14...Restriction member. Figure 2

Claims (4)

【特許請求の範囲】[Claims] (1)ダイス面に沿って往復移動するシューボックスの
内部に、投入口から粉末を供給して下部開口からダイス
キャビティ内に充填する装置において、上記シューボッ
クスの内部の上面に、このシューボックスの前部に流れ
る粉末の量を減らす垂下部材が設けられたことを特徴と
する粉末成形における均一充填装置。
(1) In a device that supplies powder from an inlet into a shoe box that reciprocates along the die surface and fills it into the die cavity from a lower opening, the shoe box is A uniform filling device for powder molding, characterized in that a hanging member is provided to reduce the amount of powder flowing in the front part.
(2)シューボックスの投入口の下部に、粉末の流量を
制限する制限部材が設けられたことを特徴とする請求項
1記載の粉末成形における均一充填装置。
(2) The uniform filling device for powder molding according to claim 1, further comprising a restricting member for restricting the flow rate of the powder provided below the input port of the shoe box.
(3)シューボックスの前進端位置において、制限部材
がダイスキャビティの一部を閉塞するように構成された
ことを特徴とする請求項2記載の粉末成形における均一
充填装置。
(3) The uniform filling device for powder molding according to claim 2, wherein the limiting member is configured to partially close the die cavity at the forward end position of the shoe box.
(4)制限部材がダイスキャビティを閉塞する面積はこ
のダイスキャビティの開口面積の2〜3%に設定された
ことを特徴とする請求項3記載の粉末成形における均一
充填装置。
(4) The uniform filling device for powder molding according to claim 3, wherein the area where the restricting member closes the die cavity is set to 2 to 3% of the opening area of the die cavity.
JP63258589A 1988-10-14 1988-10-14 Uniform filling equipment in powder molding Expired - Lifetime JP2638139B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63258589A JP2638139B2 (en) 1988-10-14 1988-10-14 Uniform filling equipment in powder molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63258589A JP2638139B2 (en) 1988-10-14 1988-10-14 Uniform filling equipment in powder molding

Publications (2)

Publication Number Publication Date
JPH02108497A true JPH02108497A (en) 1990-04-20
JP2638139B2 JP2638139B2 (en) 1997-08-06

Family

ID=17322359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63258589A Expired - Lifetime JP2638139B2 (en) 1988-10-14 1988-10-14 Uniform filling equipment in powder molding

Country Status (1)

Country Link
JP (1) JP2638139B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481993B1 (en) 1998-12-28 2002-11-19 Sumitomo Special Metals Co., Ltd. Process and apparatus for supplying rare earth metal-based alloy powder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101958A (en) * 1980-12-16 1982-06-24 Fujitsu Ltd Memory address extension system
JPS589486A (en) * 1981-07-08 1983-01-19 Sony Corp Synchronism detecting circuit
JPS5973099U (en) * 1982-11-09 1984-05-17 トヨタ自動車株式会社 powder feeding device
JPS6068083A (en) * 1983-09-26 1985-04-18 Nitto Electric Ind Co Ltd Formation of surface protective layer
JPS61110642U (en) * 1984-12-22 1986-07-12

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101958A (en) * 1980-12-16 1982-06-24 Fujitsu Ltd Memory address extension system
JPS589486A (en) * 1981-07-08 1983-01-19 Sony Corp Synchronism detecting circuit
JPS5973099U (en) * 1982-11-09 1984-05-17 トヨタ自動車株式会社 powder feeding device
JPS6068083A (en) * 1983-09-26 1985-04-18 Nitto Electric Ind Co Ltd Formation of surface protective layer
JPS61110642U (en) * 1984-12-22 1986-07-12

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6481993B1 (en) 1998-12-28 2002-11-19 Sumitomo Special Metals Co., Ltd. Process and apparatus for supplying rare earth metal-based alloy powder
US6779995B2 (en) 1998-12-28 2004-08-24 Neomax Co., Ltd. Process and apparatus for supplying rare earth metal-based alloy powder

Also Published As

Publication number Publication date
JP2638139B2 (en) 1997-08-06

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