JPH0780272A - Rotary powder molding apparatus - Google Patents
Rotary powder molding apparatusInfo
- Publication number
- JPH0780272A JPH0780272A JP5226803A JP22680393A JPH0780272A JP H0780272 A JPH0780272 A JP H0780272A JP 5226803 A JP5226803 A JP 5226803A JP 22680393 A JP22680393 A JP 22680393A JP H0780272 A JPH0780272 A JP H0780272A
- Authority
- JP
- Japan
- Prior art keywords
- punch
- powder
- pressure
- molding apparatus
- molding
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Glanulating (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば核燃料ペレット
のような焼結体の中間製作物であるセラミックスまたは
金属粉末の回転式圧粉成形装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compacting apparatus for ceramic or metal powder which is an intermediate product of a sintered body such as a nuclear fuel pellet.
【０００２】[0002]
【従来の技術】セラミックスまたは金属の圧粉成形体
は、セラミックスまたは金属の焼結体を製造するために
製作される中間製造物である。圧粉成形体の製造方法と
しては、一軸成形、射出成形、静水圧成形などの、生産
性や目的とする焼結体の形状等によっていろいろな方法
が試みられている。この中で一軸成形法は、製造方法が
最も単純で量産性に優れ、製品の寸法精度が良好である
ため、単純形状の製品の量産技術として幅広く適用され
ている。2. Description of the Related Art A ceramic or metal powder compact is an intermediate product produced for producing a ceramic or metal sintered body. As a method for producing a powder compact, various methods such as uniaxial molding, injection molding, and hydrostatic molding have been tried depending on the productivity and the shape of the desired sintered body. Among them, the uniaxial molding method is widely applied as a mass production technology for products having a simple shape because the manufacturing method is the simplest, the mass productivity is excellent, and the dimensional accuracy of the products is good.
【０００３】一軸成形法を適用した成形体の製造装置と
しては、核燃料ペレット、錠剤等の製造用に回転式粉末
成形装置が幅広く用いられている。この装置は、粉末供
給工程、粉末加圧工程、および成形体の取り出し工程か
ら構成されている。このうち、粉末加圧工程では、図７
に示すように油圧タンクに接続された上下加圧ロール３
の円弧軌道上を粉末加圧パンチ６が乗り上げ、パンチ６
の上方に位置している粉末（図示せず）にパンチ６が押
し込まれて粉末を加圧する。なお、この図７は下パンチ
部分のみを示すもので、加圧すべき粉末の上方にもこれ
と同じ機構の上パンチがこれと上下対称の位置にあっ
て、上パンチが同様に加圧ロールの円弧上に乗り上げて
下方に下がり、上下から粉末を加圧するようになってい
る。A rotary powder molding machine is widely used for manufacturing nuclear fuel pellets, tablets and the like as a molding machine for applying a uniaxial molding method. This apparatus includes a powder supplying step, a powder pressurizing step, and a molded body take-out step. Of these, in the powder pressurizing step, FIG.
Vertical pressure roll 3 connected to a hydraulic tank as shown in
The powder pressure punch 6 rides on the arc orbit of
The punch 6 is pressed into the powder (not shown) positioned above to press the powder. It should be noted that FIG. 7 shows only the lower punch portion, and the upper punch of the same mechanism is vertically symmetrical with the upper punch of the powder to be pressed. It rides on an arc and descends downward to pressurize the powder from above and below.
【０００４】この時、加圧速度が十分に遅い場合は、油
圧タンクの油圧リリーフ弁の開閉、アキュムレータによ
る油圧変動の緩衝により上下加圧ロールのストロークを
調整し、油圧を一定に保つことにより、常に一定の荷重
を粉末に与えることができる。しかし、油圧リリーフ弁
やアキュムレータは、核燃料ペレットや錠剤の実生産ラ
インの加圧時に油圧タンク内に発生する急激な圧力変動
を緩衝できるような応答性を持っていない。したがっ
て、成形体の製造時には、油圧タンクの油圧は、図５中
の履歴１２を示しており、油圧設定値１３より、高い圧
力によって粉末を成形していることになる。このことに
より、成形体の密度に直接影響を及ぼす粉末の成形圧力
（最高加圧力）は成形体の高さに比例して増加する傾向
を示すことになる。At this time, if the pressurizing speed is sufficiently slow, the stroke of the vertical pressurizing roll is adjusted by opening / closing the hydraulic relief valve of the hydraulic tank and buffering the hydraulic pressure fluctuation by the accumulator to keep the hydraulic pressure constant. A constant load can be applied to the powder at all times. However, the hydraulic relief valve and the accumulator do not have the responsiveness capable of buffering the rapid pressure fluctuation generated in the hydraulic tank during pressurization of the actual production line of nuclear fuel pellets and tablets. Therefore, when the compact is manufactured, the hydraulic pressure of the hydraulic tank indicates the history 12 in FIG. 5, and the powder is compacted at a pressure higher than the hydraulic pressure set value 13. As a result, the molding pressure (maximum applied pressure) of the powder, which directly affects the density of the molded body, tends to increase in proportion to the height of the molded body.
【０００５】そこで従来は、この成形体の高さが、ダイ
ス型への粉末供給量によって決定されることを考え、粉
末供給量の変動をできるだけ小さくする方法（特開昭57
-72811号公報参照）や、成形圧力変動を計測し、その変
動量に基づき、粉末供給量にフィードバックをかけ、成
形圧力、粉末供給量の均一化を計る方法が試みられてき
た（特開昭59-42200号公報、特開平01-113200 号公報参
照）。Therefore, conventionally, considering that the height of the molded body is determined by the powder supply amount to the die mold, a method for minimizing the fluctuation of the powder supply amount (Japanese Patent Laid-Open No. 57-57).
No. 72811), or a method of measuring the molding pressure fluctuation and feeding back the powder supply amount on the basis of the fluctuation amount to make the molding pressure and the powder supply amount uniform (Japanese Patent Laid-Open Publication No. Sho. 59-42200, Japanese Patent Laid-Open No. 01-113200).
【０００６】しかしながら現在の回転式粉末成形装置
は、油圧タンクの圧力が一つ一つの成形ごとに変動する
条件で使用されているために、成形体の高さ変動に起因
して系統的に発生する成形圧力の変動の他に、油圧タン
クの圧力変動に起因して発生するランダムな成形圧力の
変動が生じている。しかし、上記の従来の方法では、成
形体の高さ変動に起因する系統的な成形圧力の変動を低
減することはできても、油圧タンクの圧力変動に起因す
るランダムな成形圧力の変動を低減することはできな
い。その結果、成形体間の密度変動が生じている。However, the current rotary powder molding apparatus is used under the condition that the pressure of the hydraulic tank varies for each molding, and therefore systematically occurs due to the variation of the height of the compact. In addition to the fluctuation of the molding pressure, the random fluctuation of the molding pressure occurs due to the pressure fluctuation of the hydraulic tank. However, in the above-mentioned conventional method, it is possible to reduce the systematic fluctuation of the molding pressure caused by the height fluctuation of the molded body, but reduce the random fluctuation of the molding pressure caused by the pressure fluctuation of the hydraulic tank. You cannot do it. As a result, there is a density variation between the compacts.
【０００７】また、図７に示すような従来の油圧により
粉末を加圧する回転式粉末成形装置では、例えば上下パ
ンチ６は粉末をダイス内に充填したまま水平パンチ１の
軌道上を矢印７の方向へ移動し、油圧タンク４上に浮動
する加圧ローラ３に達して加圧ローラ面上に乗り上げ、
粉末を加圧成形する。このとき、粉末への加圧は、上下
パンチが加圧ローラに乗り上げるときから加圧ローラの
頂点に達するまでになされるから加圧ローラの円弧のカ
ーブに依存し、したがって時間的に短くかつ圧力変動も
大きい。これに対して加圧時間を長くし、加圧変動を小
さくするには加圧ローラの半径を大きくすればよいが、
装置の大きさ、パンチの円軌道の制限より、上下加圧ロ
ーラの半径の大きさには限界がある。Further, in a conventional rotary type powder molding apparatus for pressurizing powder by hydraulic pressure as shown in FIG. 7, for example, the upper and lower punches 6 are filled with powder in the die and the orbit of the horizontal punch 1 is in the direction of arrow 7. To reach the pressure roller 3 floating on the hydraulic tank 4 and ride on the pressure roller surface,
The powder is pressed. At this time, the pressure applied to the powder depends on the arc curve of the pressure roller because it is performed from when the upper and lower punches ride on the pressure roller until it reaches the apex of the pressure roller. Fluctuations are large. On the other hand, in order to lengthen the pressurizing time and reduce the pressurizing fluctuation, the radius of the pressurizing roller should be increased.
Due to the size of the device and the circular trajectory of the punch, the radius of the upper and lower pressure rollers is limited.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、上記状況に
対処してなされたものであって、例えばセラミックス粉
末または金属粉末の成形体を製造する場合に使用され
る、油圧により粉末を加圧成形する回転式粉末成形装置
において、従来と同等以上の量産性を保持し、しかも成
形体間の密度変動を低減することの可能な回転式粉末成
形装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above situation, and pressurizes powder by hydraulic pressure, which is used when, for example, a molded body of ceramic powder or metal powder is manufactured. It is an object of the present invention to provide a rotary powder molding apparatus for molding, which is capable of maintaining mass productivity equal to or higher than that of a conventional one, and capable of reducing density fluctuation between moldings.
【０００９】[0009]
【課題を解決するための手段】本発明は上記目的を解決
するためになされたもので、油圧によりパンチを上下さ
せて粉末を加圧・成形する回転式粉末成形装置におい
て、油圧によるパンチの上下運動を、ゆるやかな傾斜面
を有するパンチ台を介して行なうことを特徴とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned object, and in a rotary powder molding apparatus for pressurizing and molding powder by hydraulically moving the punch up and down, the punch is moved up and down by hydraulic pressure. It is characterized in that the exercise is performed via a punch table having a gentle slope.
【００１０】ゆるやかな傾斜面を有するパンチ台は加圧
ローラ面に浮動して設置されていてもよいし、加圧ロー
ラを用いずに設置されていてもよい。また、このパンチ
台は交換可能な構造であり、適宜形状の異なる種々のパ
ンチ台を用いることができる。The punch table having a gently inclined surface may be installed floating on the pressure roller surface, or may be installed without using the pressure roller. The punch table has a replaceable structure, and various punch tables having different shapes can be used.
【００１１】[0011]
【作用】前述したように、成形体間の密度変動は、成形
圧力の変動によって発生する。成形圧力の変動には、成
形体の高さ変動によって系統的に発生する変動と、油圧
変動によってランダムに発生する変動がある。この油圧
変動は、粉末の高速度加圧時に発生する油圧タンクの圧
力変動を油圧リリーフ弁やアキュムレータによって緩衝
できないことによって発生する。よって、この加圧速度
を低減できれば、油圧リリーフ弁やアキュムレータによ
る圧力緩衝が可能となる。As described above, the density fluctuation between the molded bodies is caused by the fluctuation of the molding pressure. The fluctuation of the molding pressure includes a fluctuation that systematically occurs due to the height fluctuation of the molded body and a fluctuation that randomly occurs due to the hydraulic pressure fluctuation. This hydraulic pressure fluctuation occurs because the hydraulic pressure relief valve and the accumulator cannot buffer the pressure fluctuation of the hydraulic tank that occurs when the powder is pressurized at a high speed. Therefore, if the pressurizing speed can be reduced, the pressure can be buffered by the hydraulic relief valve and the accumulator.
【００１２】粉末の加圧速度は、回転式粉末成形装置の
回転速度と、加圧開始点から最高加圧点までの距離およ
びパンチ軌道面の傾きによって決定される。したがっ
て、同じ回転速度においては、加圧開始点から最高加圧
点までの距離を長くし、パンチ軌道面の傾きを小さくす
ることで油圧変動を低減することができる。本発明の回
転式粉末成型装置では、従来の加圧ローラ面に代わって
ゆるやかな傾斜面を有するパンチ台を使用したので、加
圧開始点から最高加圧点までの距離が長くなりかつパン
チ軌道面の傾きが従来より低減されて粉末の加圧速度が
低減し、成形密度変動を小さくすることができる。The pressing speed of the powder is determined by the rotating speed of the rotary powder molding apparatus, the distance from the pressing start point to the maximum pressing point, and the inclination of the punch track surface. Therefore, at the same rotation speed, the hydraulic pressure fluctuation can be reduced by increasing the distance from the pressurization start point to the maximum pressurization point and reducing the inclination of the punch track surface. In the rotary powder molding apparatus of the present invention, the punch table having a gentle inclined surface is used instead of the conventional pressing roller surface, so that the distance from the pressing start point to the maximum pressing point becomes long and the punch trajectory is increased. The inclination of the surface is reduced as compared with the conventional case, the pressing rate of the powder is reduced, and the variation of the molding density can be reduced.
【００１３】[0013]
【実施例】図１は本発明の一実施例の回転式粉末成形装
置の粉末加圧工程の下パンチ軌道の断面図、図２は図１
の装置の全工程を示す説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a lower punch orbit of a powder pressing step of a rotary powder molding apparatus according to an embodiment of the present invention, and FIG.
It is explanatory drawing which shows all the processes of the apparatus of FIG.
【００１４】まず、図２において、９は粉末充填工程
を、１０は粉末加圧工程を、８は成型体取り出し工程を
示し、図１はこの粉末加圧工程１０の部分の下パンチ軌
道を説明する断面図である。本装置は、加圧ローラ３
に、パンチ６の水平方向の円軌道に沿い、垂直方向の低
角度の勾配を持つパンチ台２を浮動させて構成されてい
る。また、粉末加圧中のパンチ６の回転をよくし摩擦を
低減するために、パンチ軌道面には凹面のガイドを（図
示せず）、パンチ６には軌道面と接する部分にローラ１
１を設けている（図３参照）。また、上側のパンチ台
（図示せず）は水平ガイド上に乗せた状態になっている
ので、パンチ６による加圧を受けていない状態でも落下
することはない。First, in FIG. 2, 9 is a powder filling step, 10 is a powder pressurizing step, 8 is a molded body take-out step, and FIG. 1 is a lower punch orbit of the powder pressing step 10. FIG. This device is equipped with a pressure roller 3
In addition, the punch table 2 having a low-angle vertical gradient is floated along the horizontal circular orbit of the punch 6. Further, in order to improve the rotation of the punch 6 during powder pressing and reduce friction, a concave guide (not shown) is provided on the punch raceway surface, and the roller 1 is provided on the punch 6 at a portion in contact with the raceway surface.
1 is provided (see FIG. 3). Further, since the upper punch table (not shown) is placed on the horizontal guide, it does not drop even when it is not being pressed by the punch 6.
【００１５】この装置における粉末の加圧時間は、上下
パンチ６が上下加圧ローラ３に浮動するパンチ台２の軌
道に乗り上げた瞬間から、パンチ台２の中点に達するま
での時間であり、加圧ローラ３単独で粉末に荷重を加え
る場合に比べ（図７参照）、加圧時間を十分長くするこ
とができる。また、粉末の加圧速度も最高圧力が一定で
あれば、加圧時間に反比例して小さくなり、油圧タンク
４に作用する圧力変動速度も低減される。The pressing time of the powder in this apparatus is the time from the moment when the upper and lower punches 6 ride on the orbit of the punch base 2 floating on the upper and lower pressure rollers 3 to the midpoint of the punch base 2. The pressing time can be made sufficiently longer than in the case where the pressure roller 3 alone applies a load to the powder (see FIG. 7). Moreover, if the maximum pressure is constant, the powder pressurizing speed also decreases in inverse proportion to the pressurizing time, and the pressure fluctuation speed acting on the hydraulic tank 4 is also reduced.
【００１６】図６に本実施例に用いた回転式粉末成形装
置の油圧タンクのＵＯ2 粉末成形中の圧力変動履歴を示
す。この図６と図５を比較すると、本実施例に用いた回
転式粉末成形装置は、成形装置の回転速度が同じ条件下
において、従来の装置に比べて加圧速度が小さいため、
油圧の変動１４に対する油圧リリーフ弁およびアキュム
レータの油圧変動緩衝作用がより有効に働き、その結
果、油圧タンクの圧力変動幅が小さくなり、油圧タンク
の設定圧力１５と、粉末の最高加圧時の油圧タンクの圧
力との差が小さくなることがわかる。FIG. 6 shows a pressure fluctuation history during UO 2 powder molding in the hydraulic tank of the rotary powder molding apparatus used in this embodiment. Comparing FIG. 6 and FIG. 5, the rotary powder molding apparatus used in this example has a smaller pressurizing speed than the conventional apparatus under the same rotating speed of the molding apparatus.
The hydraulic pressure relief valve and the accumulator's hydraulic pressure fluctuation buffering action against the hydraulic pressure fluctuation 14 work more effectively, and as a result, the pressure fluctuation width of the hydraulic tank becomes smaller, and the hydraulic tank set pressure 15 and the hydraulic pressure at the time of maximum pressurization of powder are reduced. It can be seen that the difference with the tank pressure is small.
【００１７】本実施例の回転式粉末成形装置を用いてＵ
Ｏ2 粉末の成形体を製作したところ、同じ回転速度にお
いて従来の回転式粉末成形装置を用いた場合に比べ、成
形体間の密度変動幅が小さくなった。これは、粉末の最
高加圧時の油圧タンクの圧力と油圧タンクの設定圧力15
との差が小さくなったことによって、成形圧力の変動が
低減されたことによると考えられる。Using the rotary powder molding apparatus of this embodiment, U
When a compact of O 2 powder was manufactured, the fluctuation range of the density between the compacts was smaller than that in the case of using the conventional rotary powder compactor at the same rotation speed. This is the pressure of the hydraulic tank at the maximum pressurization of powder and the set pressure of the hydraulic tank 15
It is considered that the fluctuation of the molding pressure is reduced due to the smaller difference between
【００１８】また、本実施例の回転式粉末成形装置を用
いた場合、従来の回転式粉末成形装置と同様に、回転速
度の増加とともに成形体間の密度変動幅が増加する傾向
が認められた。よって、従来と同程度の成形密度の変動
幅の範囲内で成形体を製造する場合には、本実施例の回
転式粉末成形装置を用いることにより、従来より回転速
度を速くした状態での製造が可能となり、製造効率を上
げることができた。Further, when the rotary powder molding apparatus of the present embodiment was used, it was observed that the fluctuation range of the density between the compacts increased with the increase of the rotation speed, as in the conventional rotary powder molding apparatus. . Therefore, in the case of manufacturing a molded body within the range of the fluctuation range of the molding density of the same level as the conventional, by using the rotary powder molding apparatus of the present embodiment, the production in a state in which the rotation speed is faster than the conventional It has become possible to improve the manufacturing efficiency.
【００１９】また、本実施例の回転式粉末成形装置に用
いたパンチ６のローラによる摩擦力の低減効果、およ
び、パンチ軌道面の勾配の低角度化による加圧速度の低
減により、パンチ６とパンチ台２との間に作用する摩擦
力によるパンチ６とパンチ軌道面２の摩耗速度を低減す
ることができた。Further, due to the effect of reducing the frictional force by the rollers of the punch 6 used in the rotary powder molding apparatus of this embodiment and the reduction of the pressing speed by reducing the inclination of the punch raceway surface, the punch 6 and It was possible to reduce the wear rate of the punch 6 and the punch raceway surface 2 due to the frictional force acting between the punch table 2 and the punch table 2.
【００２０】本発明の回転式粉末成形装置はパンチ台が
交換可能であるので、交換使用することにより磨耗を防
ぐことができ、また任意形状のものを使用できるので、
使用粉末の特性に応じた加圧速度を選ぶことができる。In the rotary powder molding apparatus of the present invention, since the punch table can be replaced, wear can be prevented by replacing the punch table, and an arbitrary shape can be used.
The pressing speed can be selected according to the characteristics of the powder used.
【００２１】図４は本発明の他の実施例に用いた回転式
粉末成形装置の下パンチ軌道の展開図を示す。本実施例
では、加圧成形する酸化ウラン粉末の圧縮性に適合する
ように、曲面状の低角度の勾配を持ち、パンチ軌道に沿
ったパンチ台２を加圧ローラの代わりに取り付け、粉末
成形を行った。この場合も、加圧ローラ３を用いた従来
の方法に比べ、粉末の加圧速度を小さくすることがで
き、成形密度変動を小さくすることができた。FIG. 4 is a development view of the lower punch orbit of the rotary powder molding apparatus used in another embodiment of the present invention. In the present embodiment, the punch table 2 having a curved low-angle gradient and having a curved low-angle gradient is attached in place of the pressure roller in order to match the compressibility of the uranium oxide powder to be pressure-molded. I went. In this case as well, compared with the conventional method using the pressure roller 3, the powder pressing speed can be reduced, and the molding density fluctuation can be reduced.
【００２２】[0022]
【発明の効果】以上説明したように、本発明の回転式粉
末成形装置によれば、任意形状のパンチ台を用いて従来
の油圧タンク内の圧力変動を低減することにより、成形
圧力変動幅を低減でき、その結果、成形体間の密度変動
幅を小さくすることができる。As described above, according to the rotary type powder molding apparatus of the present invention, the fluctuation of the molding pressure is reduced by reducing the pressure fluctuation in the conventional hydraulic tank by using the punch table having an arbitrary shape. As a result, it is possible to reduce the fluctuation range of density between molded bodies.
【００２３】また、回転式粉末成形装置の回転速度を従
来より速くすることによって、従来と同程度の成形体の
密度変動を保持したままで成形体の製造効率を上げるこ
ともできる。また、パンチの軌道面接触部分に磨耗防止
用のローラをつければ、パンチとパンチ軌道面との間の
摩耗を低減でき、その結果パンチおよびパンチ軌道の交
換頻度を低減することができる。Further, by increasing the rotation speed of the rotary powder molding apparatus as compared with the conventional one, it is possible to improve the manufacturing efficiency of the molded body while maintaining the same density fluctuation of the molded body as the conventional one. Further, if a roller for wear prevention is attached to the contact portion of the punch raceway surface, the wear between the punch and the punch raceway surface can be reduced, and as a result, the frequency of replacement of the punch and the punch raceway can be reduced.
【図１】本発明の一実施例の回転式粉末成形装置の加圧
工程部分の下パンチ軌道の断面図。FIG. 1 is a cross-sectional view of a lower punch track of a pressing process portion of a rotary powder molding apparatus according to an embodiment of the present invention.
【図２】図１の回転式粉末成形装置の全工程を示す説明
図。FIG. 2 is an explanatory view showing all steps of the rotary powder molding apparatus of FIG.
【図３】図１のパンチの軌道接触部分の詳細図。FIG. 3 is a detailed view of an orbital contact portion of the punch shown in FIG.
【図４】本発明の他の実施例の回転式粉末成形装置の加
圧工程の下パンチ軌道の断面図。FIG. 4 is a cross-sectional view of a lower punch orbit of a pressing process of a rotary powder molding apparatus according to another embodiment of the present invention.
【図５】従来の回転式粉末成形装置の粉末成形時の油圧
タンクの圧力履歴を示す図。FIG. 5 is a diagram showing a pressure history of a hydraulic tank during powder molding by a conventional rotary powder molding apparatus.
【図６】図１の回転式粉末成形装置の粉末成形時の油圧
タンクの圧力履歴を示す図。6 is a diagram showing a pressure history of a hydraulic tank during powder molding by the rotary powder molding apparatus of FIG.
【図７】従来の回転式粉末成形装置の加圧工程の下パン
チ軌道の断面図。FIG. 7 is a cross-sectional view of a lower punch orbit of a pressing process of a conventional rotary powder molding apparatus.
１…パンチ水平軌道台、２…交換することができる粉末
加工工程のパンチ台、３…加圧ローラ、４…油圧タン
ク、５…パンチ下端の軌道、６…パンチ、７…回転方
向、８…成形体取り出し工程、９…粉末充填工程、１０
…粉末加圧工程、１１…軌道面との摩耗防止用のロー
ラ、１２，１４…油圧タンクの圧力履歴、１３，１５…
油圧設定値。DESCRIPTION OF SYMBOLS 1 ... Punch horizontal rail, 2 ... Punch rails that can be replaced in a powder processing step, 3 ... Pressure roller, 4 ... Hydraulic tank, 5 ... Bottom rail of punch, 6 ... Punch, 7 ... Rotation direction, 8 ... Molded body removing step, 9 ... powder filling step, 10
... Powder pressurizing step, 11 ... Rollers for preventing wear with the raceway surface, 12,14 ... Pressure history of hydraulic tank, 13,15 ...
Hydraulic pressure setting value.
Claims (4)
圧・成形する回転式粉末成形装置において、油圧による
パンチの上下運動をゆるやかな傾斜面を有するパンチ台
を介して行なうことを特徴とする回転式粉末成形装置。1. A rotary powder molding apparatus for pressurizing and molding powder by hydraulically moving a punch up and down to perform vertical movement of the punch by hydraulic pressure through a punch table having a gently inclined surface. Rotary powder molding equipment.
圧ローラ面に浮動して設置されている請求項１記載の回
転式粉末成形装置。2. The rotary powder molding apparatus according to claim 1, wherein a punch table having a gently inclined surface is installed floating on the pressure roller surface.
圧ローラなしに設置されている請求項１記載の回転式粉
末成形装置。3. The rotary powder molding apparatus according to claim 1, wherein a punch table having a gently inclined surface is installed without a pressure roller.
換可能な構造である請求項１記載の回転式粉末成形装
置。4. The rotary powder molding apparatus according to claim 1, wherein the punch table having a gently inclined surface has a replaceable structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5226803A JPH0780272A (en) | 1993-09-13 | 1993-09-13 | Rotary powder molding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5226803A JPH0780272A (en) | 1993-09-13 | 1993-09-13 | Rotary powder molding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0780272A true JPH0780272A (en) | 1995-03-28 |
Family
ID=16850858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5226803A Pending JPH0780272A (en) | 1993-09-13 | 1993-09-13 | Rotary powder molding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0780272A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045927A (en) * | 1996-05-22 | 2000-04-04 | Hitachi Metals, Ltd. | Composite material for electronic part and method of producing same |
| US6129993A (en) * | 1998-02-13 | 2000-10-10 | Hitachi Metals, Ltd. | Heat spreader and method of making the same |
-
1993
- 1993-09-13 JP JP5226803A patent/JPH0780272A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045927A (en) * | 1996-05-22 | 2000-04-04 | Hitachi Metals, Ltd. | Composite material for electronic part and method of producing same |
| US6129993A (en) * | 1998-02-13 | 2000-10-10 | Hitachi Metals, Ltd. | Heat spreader and method of making the same |
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