JP3085523B2 - Powder filling equipment - Google Patents
Powder filling equipmentInfo
- Publication number
- JP3085523B2 JP3085523B2 JP08210083A JP21008396A JP3085523B2 JP 3085523 B2 JP3085523 B2 JP 3085523B2 JP 08210083 A JP08210083 A JP 08210083A JP 21008396 A JP21008396 A JP 21008396A JP 3085523 B2 JP3085523 B2 JP 3085523B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- filler box
- molding recess
- powder filling
- raw material
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/304—Feeding 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)
- Powder Metallurgy (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば歯車等の円
盤状素材を圧粉成形にて成形する際に、粉体密度を均一
化するための改良技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved technique for making a powder density uniform when a disk-shaped material such as a gear is formed by powder compaction.
【０００２】[0002]
【従来の技術】従来、例えば金属粉末を主体とする原料
粉末を圧縮、焼結し、ギヤ部品等の焼結品を製造するよ
うな圧粉成形法において、ダイの成形凹部に原料粉末を
充填する装置として、下面が開口したフィラーボックス
内に原料粉末を供給し、このフィラーボックスをダイの
上面に沿って摺動させながらダイの成形凹部上に臨ま
せ、ボックス内の粉末を成形凹部内に落とし込んで充填
するような技術が知られている。例えば実公平３−２０
０６９号の場合は、この種のタイプの充填装置におい
て、成形凹部の前方側（フィラーボックスの前進側）の
粉末に密度に較べて成形凹部の後端側（フィラーボック
スの後退側）の粉末密度が濃くなるのを防止する技術で
ある。2. Description of the Related Art Conventionally, in a compacting method in which, for example, a raw material powder mainly composed of a metal powder is compressed and sintered to produce a sintered product such as a gear part, the raw material powder is filled in a molding recess of a die. As a device to perform, the raw material powder is supplied into a filler box having an open lower surface, and the filler box is slid along the upper surface of the die so as to face the molding recess of the die, and the powder in the box is introduced into the molding recess. A technique of dropping and filling is known. For example, 3-20
In the case of No. 069, in this type of filling apparatus, the powder density on the rear end side (retracting side of the filler box) of the rear side of the forming concave section is smaller than that of the powder on the front side of the forming concave section (forward side of the filler box). This is a technique to prevent the darkening.
【０００３】[0003]
【発明が解決しようとする課題】ところで、図５及び図
６に示すように、成形凹部５１の形状が、例えばギヤ部
品のように略円形である場合であって、フィラーボック
ス５２の下面開口部が略矩形状であるような場合は、フ
ィラーボックス５２の進退動方向を前後方向とした場
合、成形凹部５１の前後端部ａ、ｂに較べて左右両端部
ｃ、ｄの原料粉末Ｈの充填密度が濃くなるという不具合
があった。これは、フィラーボックス５２が成形凹部５
１上を進退動して粉末Ｈを充填する過程において、成形
凹部５１の形状的な理由（表１にあるようなギヤの孔部
を形成するためのコアの配置等）から成形凹部５１の左
右両端部ｃ、ｄに対する粉末Ｈの流れ込み量が大きくな
るのか、或いは成形凹部５１の左右両端部ｃ、ｄに対す
る加圧力が大きくなるのか、或いは両者の作用によるの
か、等の細部の理由は不明であるが、製品を成形した後
に歯面密度を測定した結果、上記傾向による密度のバラ
ツキが認められた。そしてこの歯面密度のバラツキの結
果、歯面の振れが大きくなったりする等の不具合があっ
た。As shown in FIGS. 5 and 6, when the shape of the molding recess 51 is substantially circular, for example, like a gear part, the lower surface opening of the filler box 52 is formed. Is substantially rectangular, and when the reciprocating direction of the filler box 52 is set to the front-rear direction, the filling of the raw material powder H at the left and right ends c and d as compared with the front and rear ends a and b of the molding recess 51. There was a problem that the density increased. This is because the filler box 52 is
In the process of moving back and forth over the powder H to fill the powder H, the left and right sides of the molding recess 51 are formed due to the shape of the molding recess 51 (the arrangement of the core for forming the gear hole as shown in Table 1). It is unclear why the powder H flows into both ends c and d, or whether the pressing force on the left and right ends c and d of the molding recess 51 is large, or whether they are due to the action of both. However, as a result of measuring the tooth surface density after molding the product, the density variation due to the above tendency was recognized. As a result of this variation in the tooth surface density, there was a problem that the tooth surface run-out increased.
【０００４】そこで、成形凹部５１に粉末Ｈを充填する
際、全域に亘って充填密度を均一にする方策が望まれて
いた。Therefore, when filling the molding recess 51 with the powder H, a measure for making the filling density uniform over the entire area has been desired.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
本発明は、下面が開口するフィラーボックスをダイの上
面に沿って前後に摺動させ、この摺動時に、ダイに形成
される水平断面略円形の成形凹部に前記フィラーボック
ス内の粉末を充填するようにした粉末充填装置におい
て、フィラーボックス内に、成形凹部内の左右方向に対
する粉末の流入を抑制し、左右前後の充填密度のバラン
スを図るための、中間部が内側に膨らむ左右一対の仕切
板を設けた。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention slides a filler box having an open lower surface back and forth along the upper surface of a die. In a powder filling device configured to fill a substantially circular molding recess with the powder in the filler box , a pair of fillers are provided in the filler box in the left-right direction in the molding recess.
Balun with a packing density of right and left
A pair of left and right dividers with an intermediate section swelling inward to secure
A plate was provided .
【０００６】そしてこの仕切板によって成形凹部内の左
右方向への粉末の流入を抑制するとともに、同部に対す
る加圧力を低減させ、成形凹部内全域の充填密度の均一
化を図れば、歯面密度のバラツキが少なくなり歯面の振
れの不具合を抑制出来る。The partition plate prevents the powder from flowing in the left and right directions in the molding recess, reduces the pressure applied to the same, and makes the packing density uniform throughout the molding recess. Of the tooth surface is reduced, and the problem of runout of the tooth surface can be suppressed.
【０００７】[0007]
【発明の実施の形態】本発明の実施の形態について添付
した図面に基づき説明する。ここで図１は本発明の粉末
充填装置に粉末を供給する供給装置の概要図、図２乃至
図４は本発明に係る粉末充填装置であり、図２は平面
図、図３は側面視による縦断面図、図４は正面視による
縦断面図である。Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a schematic diagram of a supply device for supplying powder to the powder filling device of the present invention, FIGS. 2 to 4 show a powder filling device according to the present invention, FIG. 2 is a plan view, and FIG. FIG. 4 is a longitudinal sectional view as viewed from the front.
【０００８】図１に示す粉末供給装置１は、例えばギヤ
部品を圧粉、焼結して製造するような製造装置におい
て、圧粉成形機の粉末充填装置２に原料粉末を供給する
装置として構成され、搬送されてくる原料粉末Ｈを一時
的に貯溜するホッパ３と、このホッパ３にホース４で連
結される小ホッパ５を備えている。そしてこの小ホッパ
５の出口部には、エアシリンダ６によって進退動自在な
シャッタ７が設けられ、また、このシャッタ７の下方に
は、粉末充填装置２が設けられている。A powder supply device 1 shown in FIG. 1 is a device for supplying a raw material powder to a powder filling device 2 of a powder compacting machine, for example, in a production device in which gear parts are compacted and sintered. A hopper 3 for temporarily storing the raw material powder H thus transported and a small hopper 5 connected to the hopper 3 by a hose 4 are provided. At the outlet of the small hopper 5, there is provided a shutter 7 which can be moved forward and backward by an air cylinder 6, and below the shutter 7, the powder filling device 2 is provided.
【０００９】粉末充填装置２は、油圧シリンダ８にてダ
イ９の上面に沿って摺動自在なフィラーボックス１０を
備え、このフィラーボックス１０は略矩形状の枠体で側
面が囲われて上面と下面が開口している。The powder filling device 2 includes a filler box 10 slidable along the upper surface of a die 9 by a hydraulic cylinder 8, and the filler box 10 is surrounded by a substantially rectangular frame, and has a side surface surrounded by a substantially rectangular frame. The lower surface is open.
【００１０】また、このフィラーボックス１０の枠体内
には、図２に示すように、進退動方向に対して左右方向
に一対の仕切板１１、１１が設けられ、実施形態では、
これら仕切板１１、１１は中間部が内側に膨らむ湾曲形
状とされている。そして、フィラーボックス１０内に原
料粉末Ｈを供給する時は、左右の仕切板１１、１１と前
後のボックス枠に囲まれる空間部内に供給するようにさ
れている。As shown in FIG. 2, a pair of partition plates 11 are provided in the frame of the filler box 10 in the left-right direction with respect to the reciprocating direction.
These partition plates 11 and 11 have a curved shape in which an intermediate portion expands inward. When supplying the raw material powder H into the filler box 10, the raw material powder H is supplied into a space surrounded by the left and right partition plates 11, 11 and the front and rear box frames.
【００１１】前記ダイ９には、歯車状の成形凹部１２
（図では歯車形状の詳細は省略されている）が設けられ
ている。そしてこの成形凹部１２は、前記フィラーボッ
クス１０の進退動路の途中に設けられており、フィラー
ボックス１０の進退動によってフィラーボックス１０内
の原料粉末Ｈが成形凹部１２内に落とし込まれて充填さ
れるようになっている。The die 9 has a gear-shaped molding recess 12.
(Details of the gear shape are omitted in the figure). The molding recess 12 is provided in the middle of the reciprocating path of the filler box 10, and the raw material powder H in the filler box 10 is dropped and filled in the molding recess 12 by the reciprocating movement of the filler box 10. It has become so.
【００１２】また、フィラーボックス１０の横幅間隔
は、成形凹部１２の直径部左右方向を充分に覆い尽くす
ことの出来る長さにされており、また、仕切板１１、１
１の前後方向中間部（一番狭まった箇所）の左右間隔
は、成形凹部１２の直径部左右間隔より短くしている。The width of the filler box 10 is set to a length capable of sufficiently covering the left-right direction of the diameter of the molding recess 12.
The left-right gap of the middle part (the narrowest point) in the front-rear direction is shorter than the left-right gap of the diameter of the molding recess 12.
【００１３】以上のような粉末充填装置２において、フ
ィラーボックス１０の後退位置で小ホッパ５から原料粉
末Ｈの供給が行われる。すなわち、シャッタ７が開いて
フィラーボックス１０の上部開口部から所定量の原料粉
末Ｈが落とし込まれ、原料粉末Ｈは、左右の仕切板１
１、１１と前後のボックス枠の間の空間部に供給され
る。In the powder filling apparatus 2 as described above, the raw material powder H is supplied from the small hopper 5 at the retracted position of the filler box 10. That is, the shutter 7 is opened, a predetermined amount of the raw material powder H is dropped from the upper opening of the filler box 10, and the raw material powder H is
It is supplied to the space between 1, 1 and the front and rear box frames.
【００１４】次いで、圧粉成形のため成形凹部１２に原
料粉末Ｈを充填する時は、フィラーボックス１０を前進
させて成形凹部１２上に臨ませ、成形凹部１２内に充填
した後、フィラーボックス１０を後退させる。この際、
原料粉末Ｈは図４に示すように、仕切板１１、１１によ
って左右方向の流入が抑制され、また、加圧力も少ない
ため前後方向端部ａ、ｂと左右方向端部ｃ、ｄの充填密
度のバランスを図ることが出来る。Next, when the raw material powder H is filled into the molding recess 12 for compacting, the filler box 10 is advanced to face the molding recess 12, and after filling into the molding recess 12, the filler box 10 is filled. Retreat. On this occasion,
As shown in FIG. 4, the raw material powder H is prevented from flowing in the left-right direction by the partition plates 11, and the packing density of the front-rear ends a and b and the left-right ends c and d is small because the pressing force is small. Can be balanced.
【００１５】そして、フィラーボックス１０が後退する
と、例えば成形凹部１２の上方から不図示の歯車型のパ
ンチを降下させて圧粉成形し、次いでその圧粉成形体を
焼結する。When the filler box 10 retreats, for example, a gear-shaped punch (not shown) is lowered from above the molding recess 12 to perform compaction, and then the compact is sintered.
【００１６】ところで、次の表１は歯面密度のバラツキ
について従来の場合と本案の仕切板を設けた場合とで比
較して示すものである。By the way, the following Table 1 shows the variation in tooth surface density between the conventional case and the case where the partition plate of the present invention is provided.
【００１７】[0017]
【表１】 [Table 1]
【００１８】また、次の表２は歯面の振れについて従来
の場合と本案の仕切板を設けた場合を比較して示すもの
である。Table 2 below shows a comparison between the conventional case and the case where the partition plate of the present invention is provided with respect to the runout of the tooth surface.
【００１９】[0019]
【表２】 [Table 2]
【００２０】これら結果、歯面密度のバラツキについて
は、従来の場合が、前後方向と左右方向で最大０．１３
１g/cm3の差があったのに対して、本案の場合は最大
０．０１９g/cm3と減少し、また歯面の振れも、従来の
最大０．０４m/mに対して０．０１m/mに減少し、本案の
有効性が確認された。As a result, the variation in the tooth surface density in the conventional case was 0.13 at the maximum in the front-rear direction and the left-right direction.
While there was a difference of 1 g / cm 3 , in the case of the present invention, it decreased to a maximum of 0.019 g / cm 3, and the runout of the tooth surface was 0.01 m compared to the conventional maximum of 0.04 m / m. / m, and the effectiveness of the present invention was confirmed.
【００２１】[0021]
【発明の効果】以上のように本発明は、下面が開口する
フィラーボックスによってダイに形成した水平断面略円
形の成形凹部に原料粉末を充填するようにした粉末充填
装置において、フィラーボックス内に、成形凹部内の左
右方向に対する粉末の流入を抑制し、左右前後の充填密
度のバランスを図るための、中間部が内側に膨らむ左右
一対の仕切板を設けたため、圧粉成形体の充填密度を全
域に亘って均一にすることが出来、歯面密度のバラツキ
を無くし、歯面の振れ等の不具合を防止することが出来
る。As described above, the present invention relates to a powder filling apparatus in which a raw material powder is filled in a molding recess having a substantially circular horizontal cross section formed in a die by a filler box having an open lower surface . Left inside molding recess
Suppress powder inflow in the right direction and fill the right and left
Left and right with middle part swelling inward to balance degrees
Since a pair of partition plates are provided, the packing density of the green compact can be made uniform over the entire area, and the unevenness of the tooth surface density can be eliminated, and problems such as tooth surface runout can be prevented.
【図１】本発明の粉末充填装置に粉末を供給する供給装
置の概要図FIG. 1 is a schematic diagram of a supply device for supplying powder to a powder filling device of the present invention.
【図２】本発明に係る粉末充填装置の平面図FIG. 2 is a plan view of a powder filling device according to the present invention.
【図３】本発明に係る粉末充填装置の側面視による縦断
面図FIG. 3 is a longitudinal sectional view of the powder filling device according to the present invention, as viewed from a side.
【図４】本発明に係る粉末充填装置の正面視による縦断
面図FIG. 4 is a longitudinal sectional view of the powder filling apparatus according to the present invention as viewed from the front.
【図５】従来の粉末充填装置の平面図FIG. 5 is a plan view of a conventional powder filling apparatus.
【図６】従来の粉末充填装置の側面視による縦断面図FIG. 6 is a vertical cross-sectional view of a conventional powder filling device as viewed from the side.
２…粉末充填装置、９…ダイ、１０…フィラーボック
ス、１１…仕切板、１２…成形凹部、Ｈ…原料粉末。2 ... Powder filling device, 9 ... Die, 10 ... Filler box, 11 ... Partition plate, 12 ... Mold recess, H ... Raw material powder.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B30B 11/00 B22F 3/035 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) B30B 11/00 B22F 3/035
Claims (1)
の上面に沿って前後に摺動させ、この摺動時に、ダイに
形成される水平断面略円形の成形凹部に前記フィラーボ
ックス内の粉末を充填するようにした粉末充填装置にお
いて、前記フィラーボックス内に、成形凹部内の左右方
向に対する粉末の流入を抑制し、左右前後の充填密度の
バランスを図るための、中間部が内側に膨らむ左右一対
の仕切板を設けたことを特徴とする粉末充填装置。1. A filler box having an open lower surface is slid back and forth along the upper surface of a die, and at the time of this sliding, the powder in the filler box is filled into a molding recess having a substantially circular horizontal cross section formed in the die. In the powder filling apparatus, left and right sides of the molding recess are provided in the filler box.
To prevent the powder from flowing in
A pair of left and right sides with the middle part swelling inward for balance
A powder filling apparatus, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08210083A JP3085523B2 (en) | 1996-08-08 | 1996-08-08 | Powder filling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08210083A JP3085523B2 (en) | 1996-08-08 | 1996-08-08 | Powder filling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1052798A JPH1052798A (en) | 1998-02-24 |
| JP3085523B2 true JP3085523B2 (en) | 2000-09-11 |
Family
ID=16583544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08210083A Expired - Lifetime JP3085523B2 (en) | 1996-08-08 | 1996-08-08 | Powder filling equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3085523B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6303920B2 (en) * | 2014-08-25 | 2018-04-04 | トヨタ自動車株式会社 | Manufacturing method of powder molded product |
-
1996
- 1996-08-08 JP JP08210083A patent/JP3085523B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1052798A (en) | 1998-02-24 |
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