JPH084960B2 - Powder press die powder supply device - Google Patents
Powder press die powder supply deviceInfo
- Publication number
- JPH084960B2 JPH084960B2 JP2070871A JP7087190A JPH084960B2 JP H084960 B2 JPH084960 B2 JP H084960B2 JP 2070871 A JP2070871 A JP 2070871A JP 7087190 A JP7087190 A JP 7087190A JP H084960 B2 JPH084960 B2 JP H084960B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- press die
- powder press
- supply device
- powder supply
- 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 - Fee Related
Links
- 239000000843 powder Substances 0.000 title claims description 78
- 238000007790 scraping Methods 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010304 firing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Powder Metallurgy (AREA)
- Glanulating (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は粉末プレス成形機の粉末プレス金型への粉末
供給装置に関するものである。TECHNICAL FIELD The present invention relates to a powder supply device for a powder press die of a powder press molding machine.
（従来の技術） 従来の粉末プレス金型への粉末供給装置は、テーブル
面の下方に粉末プレス金型を埋設しておき、無底の粉末
供給フィーダをこのテーブル面に沿って往復動させ、前
進時には粉末プレス金型の内部へ粉末を供給し、後退時
には粉末供給フィーダの前部壁面によってテーブル面に
沿って粉末の擦り切りを行う構造となっている。(Prior Art) In a conventional powder supply device for a powder press die, a powder press die is embedded below a table surface, and a bottomless powder supply feeder is reciprocated along the table surface, The powder is supplied to the inside of the powder press die when moving forward, and the powder is scraped off along the table surface by the front wall surface of the powder feeding feeder when moving backward.
ところがこのような従来の粉末供給装置により、例え
ばスプレードライヤーで造粒された酸化物系粉末と窒化
物系粉末とを粉末プレス金型内へ供給し、一片が10〜50
mm程度、厚みが0.2〜0.7mm程度の薄肉成形品を成形しよ
うとすると、粉末供給フィーダによる擦り切りのばらつ
きが不可避的に生ずる。このため、成形品を焼成すると
クラックが発生することがあるとともに、角板の四辺に
肉厚のばらつきが大きく、正方形にならずに台形となっ
たり反りが発生することがある。However, with such a conventional powder supply device, for example, oxide-based powder and nitride-based powder granulated by a spray dryer are supplied into a powder press mold, and one piece is 10 to 50.
When attempting to form a thin-walled molded product having a thickness of about mm and a thickness of about 0.2 to 0.7 mm, variations in scraping due to the powder supply feeder inevitably occur. For this reason, when the molded product is fired, cracks may occur, and the four sides of the square plate may have a large variation in wall thickness, resulting in trapezoidal or warped instead of being square.
このため、供給する原料粉末の粒度を調整したり、焼
成後の変形を見込んで予め隅部の形状を寸法補正した粉
末プレス金型を用いる方法等が工夫されているが、薄肉
成形品では寸法精度と反りの防止に限界があり、量産化
が難しいという問題があった。For this reason, methods such as adjusting the particle size of the raw material powder to be supplied and using a powder press mold with the shape of the corners corrected in advance in consideration of the deformation after firing have been devised. There is a problem in that there is a limit to accuracy and prevention of warpage, and mass production is difficult.
（発明が解決しようとする課題） 本発明は上記したような従来の問題点を解決して、粉
末プレス金型内へ擦り切りのばらつきを生ずることなく
常に均一に粉末を供給することができ、隅部の形状を寸
法補正した粉末プレス金型を用いなくとも正確な形状で
反りも極めて少ない薄肉成形品を量産することができる
粉末プレス金型への粉末供給装置を提供するために完成
されたものである。(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, and powder can be constantly and uniformly supplied into a powder press die without causing variations in scraping. Completed to provide a powder feeding device for a powder press die that can mass-produce thin-walled molded products with an accurate shape and very little warpage without using a powder press die whose shape is corrected. Is.
（課題を解決するための手段） 上記の課題を解決するためになされた本発明は、テー
ブル面に沿って往復動しつつその下方に埋設された粉末
プレス金型内に粉末を供給する無底の粉末供給フィーダ
の前面に受具を設け、この受具に粉末プレス金型の幅よ
りも広い幅を有し、下端を断面円弧状とした擦り切り板
を、自重によって上下動自在に取り付けたことを特徴と
するものである。(Means for Solving the Problems) The present invention made to solve the above problems is to provide a bottomless plate for supplying powder into a powder press die embedded below the same while reciprocating along a table surface. In the front of the powder supply feeder of No. 1, a scraping plate having a width wider than that of the powder press die and having a lower end of an arc shape in cross section is attached to the receiver so as to be vertically movable by its own weight. It is characterized by.
（実施例） 以下に本発明を図示の実施例によって詳細に説明す
る。(Example) Hereinafter, the present invention will be described in detail with reference to an illustrated example.
第１図及び第２図において、（１）はテーブル、
（２）はこのテーブル（１）に埋設された粉末プレス金
型である。粉末プレス金型（２）は下パンチ（３）を備
えたものであり、粉末プレス金型（２）の上面はテーブ
ル面（４）と同一高さとなっている。1 and 2, (1) is a table,
(2) is a powder press die embedded in this table (1). The powder press die (2) is provided with a lower punch (3), and the upper surface of the powder press die (2) is flush with the table surface (4).
（５）はこの粉末プレス金型（２）内に粉末を供給す
るための無底のボックス状の粉末供給フィーダである。
粉末供給フィーダ（５）はリンク（６）によりテーブル
面（４）に沿って往復動しつつ粉末プレス金型（２）内
に粉末を供給するもので、その上部には粉末供給部
（７）が形成されている。本発明においては、この粉末
供給フィーダ（５）の前面の受具（９）内に、下端を断
面円弧状とした擦り切り板（８）を取り付けてある。擦
り切り板（８）は超硬合金、アルミナ磁器、ジルコニア
磁器のような耐摩耗性材料からなるものであり、その肉
厚が1.6mmであるとき、下端のアールを0.5〜0.8mm程度
としておくことが好ましい。また擦り切り板（８）は粉
末供給フィーダ（５）の前面の受具（９）内に自重によ
って上下動自在に支持されているが、その紙面に垂直方
向の幅は粉末プレス金型（２）の幅よりも十分に大きい
ので、常に下端のアール部がテーブル面（４）に接触し
た状態を維持することとなる。(5) is a bottomless box-shaped powder supply feeder for supplying powder into the powder press die (2).
The powder supply feeder (5) supplies the powder into the powder press die (2) while reciprocating along the table surface (4) by the link (6), and the powder supply section (7) is provided above it. Are formed. In the present invention, a scraping plate (8) whose lower end has an arcuate cross section is attached in the receiving member (9) on the front surface of the powder supply feeder (5). The scraping plate (8) is made of a wear resistant material such as cemented carbide, alumina porcelain, zirconia porcelain, and when the wall thickness is 1.6 mm, the radius at the lower end should be 0.5 to 0.8 mm. Is preferred. The scraping plate (8) is movably supported by its own weight in the receiver (9) on the front surface of the powder supply feeder (5), and its width in the direction perpendicular to the paper surface is the powder pressing mold (2). Since it is sufficiently larger than the width of the table, the rounded portion at the lower end always keeps contact with the table surface (4).
（作用） このように構成された本発明の粉末プレス金型への粉
末供給装置の作動は次の通りである。(Operation) The operation of the powder supply device for the powder press die of the present invention thus configured is as follows.
まず、第２図の状態からテーブル面（４）に沿って粉
末供給フィーダ（５）を第３図のように前進させ、粉末
供給フィーダ（５）の内部の粉末をテーブル（１）に埋
設された粉末プレス金型（２）の内部へ供給する。この
とき、粉末プレス金型（２）の下パンチ（３）を所定の
高さまで下げておき、粉末の量を調整する。次に粉末供
給フィーダ（５）はテーブル面（４）に沿って第４図の
位置まで後退するが、このときに粉末供給フィーダ
（５）の前面に受具（９）内に自重により上下動自在に
取り付けられた擦り切り板（８）の下端の断面円弧状の
部分がテーブル面（４）に沿って粉末の擦り切りを行
う。この擦り切りは、擦り切り板（８）の幅を粉末プレ
ス金型（２）の幅よりも広くしたことと相まって、従来
の粉末供給フィーダ（５）自体の壁面によるものとは異
なり全くばらつきを生ずることがなく、また表面も滑ら
かで粉末プレス金型（２）に対して常に均一に粉末を供
給することができる。First, the powder supply feeder (5) is advanced as shown in FIG. 3 from the state of FIG. 2 along the table surface (4), and the powder inside the powder supply feeder (5) is embedded in the table (1). It is supplied to the inside of the powder press die (2). At this time, the lower punch (3) of the powder press die (2) is lowered to a predetermined height to adjust the amount of powder. Next, the powder feeding feeder (5) retreats along the table surface (4) to the position shown in FIG. 4, but at this time, the powder feeding feeder (5) moves up and down in the receiver (9) by its own weight on the front surface of the powder feeding feeder (5). The lower end of the freely attached scraping plate (8), which has an arcuate cross section, scrapes off the powder along the table surface (4). This scraping, in combination with making the width of the scraping plate (8) wider than the width of the powder pressing die (2), causes a total variation unlike the conventional wall surface of the powder feeding feeder (5) itself. In addition, the surface is smooth and the powder can be constantly and uniformly supplied to the powder pressing die (2).
その後にプレス成形が常法により行われ、成形品は下
パンチ（３）を第２図の高さまで上昇させることにより
持ち上げられ、次に粉末供給フィーダ（５）を前進させ
る際に擦り切り板（８）によりテーブル面（４）に沿っ
て左方向へ押し出される。After that, press molding is carried out by an ordinary method, the molded product is lifted by raising the lower punch (3) to the height shown in FIG. 2, and then, when the powder feeding feeder (5) is advanced, the scraping plate (8 ) Pushes to the left along the table surface (4).
なお、上記の擦り切り板（８）の下端をシャープに形
成した場合には、上記の成形品の押出しの際に擦り切り
板（８）の下端が下パンチ（３）に引っ掛かり易くな
り、また擦り切り板（８）の下端を平面状とした場合に
は、擦り切りされた粉末の表面が波打ち易くなるが、本
発明のように擦り切り板（８）の下端を断面円弧状とし
ておけば、このようなトラブルを確実に防止することが
できる。When the lower end of the scraping plate (8) is formed to be sharp, the lower end of the scraping plate (8) is easily caught by the lower punch (3) during extrusion of the molded product, and the scraping plate (8) is also formed. When the lower end of (8) is made flat, the surface of the scraped powder becomes easy to wavy. However, if the lower end of the scraped plate (8) has an arc-shaped cross section as in the present invention, such troubles will occur. Can be reliably prevented.
このように本発明によれば粉末の均一充填が可能とな
るので、成形品を焼成した場合にも寸法精度の低下、肉
厚のばらつき、反り等を防止することができる。例え
ば、本発明の装置と擦り切り板のない従来の装置とを用
いて50mm×50mmの正方形の粉末プレス金型に粉末（スプ
レードライヤで造粒された高純度アルミナ105μ粉末）
を供給し、各10枚ずつ同一条件でプレス成形と焼成とを
行った。この結果、従来の装置を用いた場合には焼成肉
厚が0.4mmとなると10枚中の５枚にクラックを発生し、
また焼成肉厚が0.3mmとなると10枚中の７枚にクラック
を発生した。これに対して本発明の装置を用いた場合に
は、焼成肉厚を0.15mmまで薄くしてもクラックの発生は
皆無であった。また４辺の最大長さと最少長さとの寸法
差、肉厚の寸法差、反りの大きさ（焼成品を平面上に置
いたときの最大高さ−焼成品の正規の肉厚）とは次表の
通りであった。As described above, according to the present invention, it is possible to uniformly fill the powder, so that it is possible to prevent a decrease in dimensional accuracy, a variation in wall thickness, a warp, etc. even when a molded product is fired. For example, powder using a device of the present invention and a conventional device without a scraping plate into a powder press die of 50 mm × 50 mm square (high-purity alumina 105 μ powder granulated by a spray dryer).
Was supplied, and press molding and firing were performed under the same conditions for each 10 sheets. As a result, in the case of using the conventional device, when the firing thickness becomes 0.4 mm, 5 out of 10 cracks occur,
Further, when the thickness of the fired product was 0.3 mm, cracks occurred in 7 out of 10 sheets. On the other hand, when the apparatus of the present invention was used, no cracks were generated even if the calcined wall thickness was reduced to 0.15 mm. In addition, the dimensional difference between the maximum length and the minimum length of the four sides, the dimensional difference in wall thickness, and the amount of warpage (maximum height when the fired product is placed on a plane-regular wall thickness of the fired product) It was as shown in the table.
（発明の効果） 以上に説明したように、本発明は粉末供給フィーダの
前面に受具を設け、この受具に粉末プレス金型の幅より
も広い幅を有し、下端を断面円弧状とした擦り切り板を
自重により上下動自在に取り付けることにより、原料粉
末を粉末プレス金型内へばらつきを生ずることなくかつ
表面が平滑な状態で均一に供給することができる。この
ため本発明の装置によれば、従来のように隅部の形状を
寸法補正した粉末プレス金型を用いなくても、寸法精度
が良好で反りの少ない薄肉成形品を量産することができ
る。 (Effects of the Invention) As described above, the present invention is provided with a receiver on the front surface of the powder supply feeder, and the receiver has a width wider than the width of the powder press die, and the lower end has an arc-shaped cross section. By mounting the scraped plate so that it can move up and down by its own weight, the raw material powder can be uniformly supplied into the powder press die without causing variations and with a smooth surface. Therefore, according to the apparatus of the present invention, it is possible to mass-produce thin-walled molded products with good dimensional accuracy and less warpage, without using a powder press mold whose corners are dimensionally corrected as in the conventional case.
よって本発明は従来の問題点を一掃した粉末プレス金
型への粉末供給装置として、産業の発展に寄与するとこ
ろは極めて大きいものがある。Therefore, the present invention has an extremely great contribution to the development of the industry as a powder supply device for a powder press die that eliminates the conventional problems.
第１図は本発明の実施例を示す平面図、第２図はその縦
断面図、第３図と第４図はその作動状態を説明する断面
図である。 （２）：粉末プレス金型、（４）：テーブル面、
（８）：擦り切り板FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIGS. 3 and 4 are sectional views for explaining the operating state thereof. (2): Powder press die, (4): Table surface,
(8): Frayed plate
Claims (1)
の下方に埋設された粉末プレス金型（２）内に粉末を供
給する無底の粉末供給フィーダ（５）の前面に受具
（９）を設け、この受具（９）に粉末プレス金型（２）
の幅よりも広い幅を有し、下端を断面円弧状とした擦り
切り板（８）を、自重によって上下動自在に取り付けた
ことを特徴とする粉末プレス金型への粉末供給装置。1. A receiver at the front of a bottomless powder supply feeder (5) for reciprocating along a table surface (4) and supplying powder into a powder press die (2) embedded below the table. (9) is provided, and the powder pressing die (2) is attached to the receiving tool (9).
A powder feeding device for a powder press die, characterized in that a scraping plate (8) having a width wider than the width and having a circular arc-shaped cross section at its lower end is attached so as to be vertically movable by its own weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2070871A JPH084960B2 (en) | 1990-03-20 | 1990-03-20 | Powder press die powder supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2070871A JPH084960B2 (en) | 1990-03-20 | 1990-03-20 | Powder press die powder supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03268899A JPH03268899A (en) | 1991-11-29 |
| JPH084960B2 true JPH084960B2 (en) | 1996-01-24 |
Family
ID=13444051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2070871A Expired - Fee Related JPH084960B2 (en) | 1990-03-20 | 1990-03-20 | Powder press die powder supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084960B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012161822A (en) * | 2011-02-08 | 2012-08-30 | Denso Corp | Powder feeding device used in powder molding press |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118926526A (en) * | 2024-07-23 | 2024-11-12 | 扬州市雪龙铜制品有限公司 | A graphite copper sleeve preparation device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272795U (en) * | 1985-10-22 | 1987-05-09 |
-
1990
- 1990-03-20 JP JP2070871A patent/JPH084960B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012161822A (en) * | 2011-02-08 | 2012-08-30 | Denso Corp | Powder feeding device used in powder molding press |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03268899A (en) | 1991-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |