JPH03268899A - Device for supplying powder into powder press metallic mold - Google Patents
Device for supplying powder into powder press metallic moldInfo
- Publication number
- JPH03268899A JPH03268899A JP7087190A JP7087190A JPH03268899A JP H03268899 A JPH03268899 A JP H03268899A JP 7087190 A JP7087190 A JP 7087190A JP 7087190 A JP7087190 A JP 7087190A JP H03268899 A JPH03268899 A JP H03268899A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- metallic mold
- supplying
- powder press
- table surface
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 82
- 238000007790 scraping Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 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
- 238000010304 firing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 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)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a powder supply device to 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) A conventional powder supply device for a powder press mold embeds a powder press mold below a table surface, and reciprocates a bottomless powder supply feeder along this table surface. Powder is supplied into the powder press mold when moving forward, and the powder is scraped off along the table surface by the front wall surface of the powder supply feeder when retreating.
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、−片がｌＯ〜５
０ｍ程度、厚みが０．２〜０．７ ｗｎ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
を焼成するとクランクが発生することがあるとともに、
角板の四辺や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 powder and nitride powder granulated with a spray dryer are supplied into a powder press mold, and the pieces are
When attempting to mold a thin-walled molded product with a thickness of about 0 m and a thickness of about 0.2 to 0.7 wn, variations in scraping by the powder supply feeder inevitably occur. For this reason, cranks may occur when the molded product is fired, and
There are large variations in the four sides and wall thickness of the square plate, causing it to become trapezoidal instead of square or warped.
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 have been devised such as adjusting the particle size of the raw material powder to be supplied and using powder press molds whose corners have been dimensionally corrected in anticipation of deformation after firing. There were limitations in accuracy and prevention of warping, which made mass production 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することなく常
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 can always uniformly supply powder into the powder press mold without causing unevenness in scraping. It was completed to provide a powder feeding device for powder press molds that can mass produce thin-walled molded products with accurate shapes and extremely little warpage without using powder press molds with dimensionally corrected corner shapes. It is something.
（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じ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、下端を断面円弧状とした擦り切り板を上下動自
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, which has been made to solve the above-mentioned problems, consists of a bottomless mold that reciprocates along the table surface and supplies powder into a powder press mold buried below the table surface. This device is characterized in that a scraping plate whose lower end has an arcuate cross section is attached to the front surface of the powder supply feeder so as to be movable up and down.
（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) The present invention will be explained in detail below with reference to illustrated embodiments.
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。In Figures 1 and 2, (1) is a table, (2)
is a powder press mold embedded in this table (1). The powder press mold (2) is equipped with a lower punch (3), and the top surface of the powder press mold (2) is on the table surface (
4) has the same height.
（５）はこの粉末プレス金型（２）内に粉末を供給する
ための無底のポ、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）の前面に、下端を断面円弧状とした擦り切
り板（８）を取り付けである。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１．６ ｔｍであ
るとき、下端のアールＺ０．５〜０．８ ｍ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 cup-shaped powder feeder for feeding powder into the powder press mold (2). The powder supply feeder (5) feeds powder into the powder press mold (2) while reciprocating along the table surface (4) by a link (6), and has a powder supply section (7) on its upper part.
is formed. In the present invention, a scraping plate (8) whose lower end has an arcuate cross section is attached to 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, or zirconia porcelain, and when its wall thickness is 1.6 tm, the lower end radius Z is 0.5 to 0.8. It is preferable to set it to about m. In addition, the scraping plate (8) is supported in a support (9) on the front side of the powder supply feeder (5) so as to be able to move up and down, but its width in the direction perpendicular to the page is the width of the powder press mold (2). Since it is sufficiently larger than , the lower end rounded portion always maintains a state in which it is in 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 apparatus for supplying powder to a powder press mold of the present invention configured as described above 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。First, from the state shown in Fig. 2, the powder supply feeder (5) is advanced along the table surface (4) as shown in Fig. 3, and the powder inside the powder supply feeder (5) is buried in the table (1). The powder is then fed into the inside of the powder press mold (2).
このとき、粉末プレス金型（２）の下バンチ（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。At this time, the lower bunch (3) of the powder press mold (2) is lowered to a predetermined height to adjust the amount of powder. Next, the powder supply feeder (5) is placed in the fourth position along the table surface (4).
It retreats to the position shown in the figure, but at this time, the lower end of the scraping plate (8), which is attached to the front of the powder supply feeder (5) so as to be able to move up and down, has an arc-shaped cross section, and the powder is removed along the table surface (4). Perform scraping. Unlike the wall surface of the conventional powder supply feeder (5) itself, this scraping does not cause any variation, and the surface is smooth, ensuring that powder is always uniformly supplied to the powder press mold (2). I can do it.
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。Thereafter, press forming is carried out in a conventional manner, and the molded product is lifted by raising the lower punch (3) to the height shown in Figure 2, and then the scraping plate (8) is lifted when the powder supply feeder (5) is advanced. ) is pushed to the left along the table surface (4).
なお、上記の擦り切り板（８）の下端をソヤープに形成
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
のように搾り切り板（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。In addition, when the lower end of the scraping plate (8) is formed into a soyarp, the lower end of the scraping plate (8) is likely to be caught by the lower punch (3) during extrusion of the molded product.
In addition, when the lower end of the scraping plate (8) is made flat,
Although the surface of the scraped powder tends to wave, such trouble can be reliably prevented if the lower end of the squeeze plate (8) has an arcuate cross section as in the present invention.
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
５０ｍｍＸ５０ｍ＋ｎ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１０５
〃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０．４唾となると１０枚中の５枚にク
ラックを発生し、また焼成肉厚が０．３ ｗｔｓとなる
と１０枚中の７枚にクランクを発生した。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０．１５閣
まで蒲＜シ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
一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 even when a molded product is fired, a decrease in dimensional accuracy, variation in wall thickness, warping, etc. can be prevented. for example,
Using the device of the present invention and a conventional device without a scraping plate, powder (high-purity alumina 105 granulated with a spray dryer) was placed in a 50 mm x 50 m + n square powder press mold.
〃Powder) was supplied, and press molding and firing were performed under the same conditions for 10 sheets each. As a result, when using conventional equipment, cracks occurred in 5 out of 10 sheets when the fired wall thickness was 0.4 wts, and 7 out of 10 sheets when the fired wall thickness became 0.3 wts. A crank occurred on one of the plates. On the other hand, when the apparatus of the present invention was used, no cracks were generated even when the fired wall thickness was increased to 0.15 mm. Also 4
The dimensional difference between the maximum and minimum length of the sides, the dimensional difference in wall thickness, and the size of warpage (maximum height when the fired product is placed on a flat surface - normal wall thickness of the fired product) are as shown in the table below. It was on the street.
（単位：＋ａ）
（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
面に下端を断面円弧状とした擦り切り板を上下動自在に
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。このため本発明の袋１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。(Unit: +a) (Effects of the Invention) As explained above, the present invention allows raw powder to be transferred to a powder press by attaching a scraping plate whose lower end has an arcuate cross section to the front of the powder supply feeder so as to be movable up and down. It is possible to uniformly supply the material into the mold without causing any dispersion and with a smooth surface. Therefore, according to the bag 1 of the present invention, thin-walled molded products with good dimensional accuracy and less warpage can be mass-produced without using a powder press mold with dimensionally corrected corner shapes as in the past. .
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 greatly contributes to the development of industry as a powder supply device for powder press molds that eliminates the problems of the conventional methods.
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。
第
図
２： 紛 拷しフ＃し大 ４≧、′ワ１８：４９ψυ惇
孜−
４；仔−ヅＩＬＩ望Ｖ
第３図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 illustrating its operating state. (2): Powder press mold, (4): Table surface, (8)
: Scraping board. Figure 2: 4≧, 'wa 18:49 ψυ楇孜-4; 子-ㅅILI Want V Figure 3
Claims (1)
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、下端を断面円弧状と
した擦り切り板（８）を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。A bottomless powder feeder (5) that reciprocates along the table surface (4) and feeds powder into the powder press mold (2) buried below the feeder (5) has a bottom end with an arcuate cross section. A powder supply device for a powder press mold, characterized in that a scraping plate (8) is attached so as to be movable up and down.
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 true JPH03268899A (en) | 1991-11-29 |
| JPH084960B2 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) |
Families Citing this family (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 |
Citations (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
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272795U (en) * | 1985-10-22 | 1987-05-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084960B2 (en) | 1996-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |