JP3734958B2 - Molding device for plate or block products - Google Patents

Molding device for plate or block products Download PDF

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Publication number
JP3734958B2
JP3734958B2 JP20078398A JP20078398A JP3734958B2 JP 3734958 B2 JP3734958 B2 JP 3734958B2 JP 20078398 A JP20078398 A JP 20078398A JP 20078398 A JP20078398 A JP 20078398A JP 3734958 B2 JP3734958 B2 JP 3734958B2
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Prior art keywords
plate
mandrel
block
shaped
rubber mold
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JP2000033609A (en
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新和 岸
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Kobe Steel Ltd
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Kobe Steel Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、板状又はブロック状製品の成形装置に係り、より具体的にはマンドレル（心棒）を有するラバープレス（乾式ＣＩＰ）による１回の加圧処理によって複数個の板状又はブロック状製品を得る装置に関するものである。
【０００２】
【従来の技術】
金属、セラミックス等の粉末の加圧圧縮成形のひとつとして冷間等方加圧（ＣＩＰ）成形法があり、このうちでも、乾式（ドライバック方式）ＣＩＰ装置は、圧媒がゴム隔型で成形体から分離されており成形体の取扱い上圧媒が付着することもない等の利点あり、実開昭６２−１９８２３０号公報（従来例の１）および特開平１−１５４７０７号公報（従来例の２）等において公知である。
【０００３】
【発明が解決しようとする課題】
従来例の１では、１回の加圧処理によって板状又はブロック状成形体（板状又はブロック状製品）の多数個成形は可能であるが次のような課題があった。
（１）；成形体接触面が全てゴム又は軟質フィルムの仕切材であるため、成形体の寸法精度（特に板材としての平坦度）が悪く、このため、機械加工代が多くなって製品歩留まりが悪くなっていた。
【０００４】
（２）；成形型が多段積みであるため粉体充填ごとにゴム型の装着及び仕切材の装着作業が必要で生産性が低いものであった。
（３）；前（２）と同様な理由から成形体のハンドリングにも時間を要するものであった。従来例の２は、板状製品又は円筒状製品の多層成形技術であって、次のような課題があった。
【０００５】
（１）；１個のモールドに対し製品が１ヶしか成形できず生産性が低いものであった。
（２）；粉末との接触面が一面（ゴム部）以外は全て金型であるため、成形体の上下にカエリ、すなわち、象の足現象が起り、これは焼成時のフラックの原因となるし、また、ハンドリングも困難であった。
【０００６】
（３）；粉体の充填密度に斑が生じ易く、また金型（側面部）の肉厚が薄い場合には加圧処理のとき金型に曲げが生じて変形に至ることがあり、これを防止するため金型はある程度の剛性（肉厚）が必要となり、成形体寸法（サイズ）が大きくなると重量過大となってハンドリングが困難であった。
本発明は、前述した従来技術の課題を、マンドレル（心棒）を有するラバープレス（乾式ＣＩＰ）によって解決したものであり、高い生産性（多数個取り、粉末充填・ハンドリングが容易）及び高精度（板状又はブロック状製品の平坦度、良好な形状）が可能な板状又はブロック状製品の成形装置を提供することが目的である。
【０００７】
ここで、板状製品とは断面方形、断面曲形、断面半月形等の板材を、又ブロック状製品とは、長さ・幅に対する厚みの比率が高い部材を意味している。
【０００８】
【課題を解決するための手段】
本発明は、前述した目的を達成するために、次の技術的手段を講じている。すなわち、請求項１に係る板状又はブロック状製品の成形装置は、ゴム型および上・下パンチで囲まれた処理室に挿脱自在として上記下パンチに備えられている金属製のマンドレルを備え、該マンドレルの外周に周方向に離れた２ヶ所以上の平面部分を形成し、該平面部分とゴム型とで２ヶ所以上の板状又はブロック状処理室を画成した板状又はブロック状製品の成形装置であって、上記処理室の上側から粉体を充填すべくゴム型およびマンドレルの上部に対して上パンチを抜出し可能に取付け、上記処理室に充填した粉体をゴム型を介して等方圧で加圧成形した後の減圧後に板状又はブロック状製品が形成された状態のマンドレルをゴム型および上パンチに対して上記下パンチと一緒に抜出し可能に構成されていることを特徴とするものである。
【０００９】
このような構成を採用したことにより、１回の加圧処理で複数個の板状又はブロック状製品を加圧成形できるし、当該板状又はブロック状製品の平坦部はマンドレルの平面部分が金型として機能し変形し易いことから、平坦度が良好となるし、インライン方式（上パンチを取外した状態）による粉末充填も容易となったのである。
【００１０】
また、請求項２に係る本発明にあっては前述した請求項１の構成において、マンドレルの外周に形成した平面部分が、曲面形状又は溝形状であることを特徴とするものであり、このような構成を採用したことにより、板状又はブロック状製品の断面形状は、方形の他、曲形、半月形（三ヶ月形を含む）にも容易に成形できるのである。
【００１１】
更に、請求項３に係る本発明にあっては前述した請求項１又は２の構成において、上・下パンチの一方又は両方の粉体との接触部を、弾性スペーサで構成していることを特徴とするものであり、このような構成を採用したことにより、加圧処理時に金属、セラミックス等の粉体（粉末）はマンドレルの平面部分を除いて弾性材料（ゴム）と接触することから成形体（板状又はブロック状製品）の端部においてカエリ（象の足現象）が発生し難く、これ故に、後工程による焼成時のクラック防止ができるし、ハンドリング性も向上するのである。
【００１２】
また、請求項４に係る本発明にあっては前述した請求項１〜３の構成において、マンドレルが下向径太のテーパー形状とされていることを特徴とするものであり、このような構成を採用したことによって、加圧成形後に、マンドレルをゴム型から抜出すときおよび抜出した後にハンドリング（移送）するとき、テーパー形状によって成形体の倒れが防止でき、これ故に、成形体ハンドリング（次工程等への移送）の無人化が容易となるのである。
【００１３】
なお、マンドレルを下パンチに着脱自在（変換自在）に装着することにより、マンドレルを用いて円筒成形体の加圧成形と板状又はブロック状製品の加圧成形とに他の構成部材（ゴム型、圧力容器、上・下パンチ等）を共用することができる。
【００１４】
【発明の実施の形態】
以下、図を参照して本発明に係る板状又はブロック状製品の成形装置（乾式ＣＩＰ装置）の実施形態について説明する。
【００１５】
図１（Ａ）（Ｂ）（Ｃ）（Ｄ）は第１実施の形態を示しており、図１（Ａ）において成形装置１は、圧媒（水、油、防錆潤滑剤を添加したエマルジョン液、エチレングリコール等）の導入・排出口２を有する円筒形の圧力容器３と、該圧力容器３の上・下開口部に嵌合固定されている円環形の上蓋４および下蓋５と、該上・下蓋４、５に挿脱自在として嵌合されている上・下パンチ６、７と、圧力容器３内に装着されている２重円筒状の加圧ゴム型８および成形ゴム型９（以下、単にゴム型９という）と、該ゴム型９および上・下パンチ６、７で囲まれた処理室に挿脱自在として下パンチ７に備えられている金属製のマンドレル１０と、前記上・下パンチ６、７の端面６Ａ、７Ａに係脱自在で圧媒による等方圧の加圧処理時の軸力を担持するプレスフレーム１１とで主構成されている。
【００１６】
なお、圧媒の導入・排出口２には図示しないが圧力発生装置部（ピストン、シリンダと逆止弁を組合せたもの）を初め減圧機構等が付帯されること勿論である。マンドレル１０には、その外周に２ヶ所以上（図では相対向して２ヶ所）の平面部分１２が形成されており、該平面部分１２とゴム型９とで２ヶ所以上の板状又はブロック状処理室１３が画成され、該処理室１３に充填した金属、セラミックス等の粉体１４をゴム型９を介して等方圧で加圧成形するように構成されている。
【００１７】
上パンチ６には、その中央部分にマンドレル１０の位置決め凹部６Ｂが形成されていて、この凹部６Ｂにマンドレル１０の上端部分が挿脱自在とされ、凹部６Ｂの外周縁には段差部を介して粉体との接触部１５が形成されている。下パンチ７にはマンドレル１０が着脱自在として立設されており、マンドレル１０下部の下パンチ７の周縁には段差部を介して粉体との接触部１６が形成され、該下パンチ７はマンドレル１０を立設した状態で図示しないリフタ装置等によって処理室にマンドレル１０を挿脱自在としている。
【００１８】
以上説明した第１実施形態の作用を説明すると、プレスフレーム１１を離脱した状態でリフタ装置等を利用してマンドレル１０を挿入セットすると、図では対向２ヶ所に処理室１３が画成され、上パンチ６を抜出した状態にして処理室１３の上側から粉体１４を充填し、この充填が完了すると上パンチ６を上蓋４に嵌合し、凹部６Ｂをマンドレル１０に被せるとともに、プレスフレーム１１を、上・下パンチ６、７の端面６Ａ、７Ａに係合し、ここに、加圧準備が完了する。
【００１９】
圧力発生装置部からの圧媒を、導入・排出口２を介して圧力容器３内に導入すると、ゴム型９を介して処理室１３に充填している粉体１４は、等方圧によって加圧成形（圧縮成形）され、このときの軸力はプレスフレーム１１にて担持するのである。所定の等方圧による加圧成形が終ると、減圧してゴム型９を復元（膨径）するとともにプレスフレーム１１を離脱し、リフタ装置等によって下パンチ７を抜き出すと、マンドレル１０には図１（Ｂ）（Ｃ）で示すように粉体を圧縮成形した板状又はブロック状製品１７が図示例では２枚が形成され、該製品１７はマンドレル１０による平面部分１２によって平坦度が良好なものとなっているのである。
【００２０】
なお、製品１７は後工程（例えば焼成工程）等にハンドリングされて、製品１７を離脱（離型）したマンドレル１０はリフタ装置等を介して圧力容器３に再セットされる。図２は本発明に係る成形装置の第２実施形態であり、上・下接触部としてゴム等の弾性スペーサ１８、１９を装着したものであり、その他の構成、作用は基本的に既述の第１実施形態と共通することから共通部分は共通符号を付している。
【００２１】
この第２実施形態では処理室１３に充填した粉体１４を等方圧にて加圧処理したとき、上・下接触部が金属であるときは接触部１５、１６が収縮しないため、カエリ（象の足現象）が生じるおそれがあることから、弾性スペーサ１８、１９を装着することにより、象の足が発生するのを防止したものであり、これによって、ハンドリング動作を容易とし、焼結時の割れの原因をなくすほか、粉末材料の歩留り低下を防止する。
【００２２】
これ故、弾性スペーサ１８、１９は、図示のように上下に装着することが望ましいが上下のいずれか一方に装着することもできる。図３および図５（Ａ）（Ｂ）を参照すれば明らかな通り、マンドレル１０に形成する平面部分１２は、図３に示すように曲面形状、図５（Ｂ）で示すように溝形状であっても良く、また、図５（Ａ）で示すように２ヶ所以上（図では４ヶ所）形成することができる。
【００２３】
なお、図示例では、平面部分１２はマンドレル１０の軸方向全長に亘って形成しているけれども、マンドレル１０の軸方向で間隔をおいて複数個（これを周方向に分数しても良い）形成しても良い。但し、平面部分を軸方向に間隔おいて形成したときは、粉体の充填にやや難があるもののこれはタッピング処理等によって回避可能である。
【００２４】
図４は本発明に係る成形装置の第３実施形態の主要部を示しており、マンドレル１０が下向径太のテーパー状に形成されたものであり、その他の構成と作用は既述と同様である。この第３実施形態によると、所定の加圧処理が終了してマンドレル１０を抜き出すときおよび抜き出してハンドリングするとき、マンドレル１０がテーパー状である故に、製品の倒れ等が防止できるのである。
【００２５】
さらに、上述の実施例はいずれも板状の製品の成形装置に係るものであるが、長さ・幅に対する厚みの比率が高く、板状の形というよりはブロック状（直方体状等）の形の製品を成形する成形装置にも本発明は適用できる。
【００２６】
【発明の効果】
以上詳述したように本発明によれば、乾式ＣＩＰ装置を用いての板状又はブロック状製品の高い生産性及び高精度性が可能となったのである。
【図面の簡単な説明】
【図１】 本発明に係る板状又はブロック状製品の成形装置の第１実施形態を示し、（Ａ）は立断面図、（Ｂ）はハンドリング中の断面図、（Ｃ）は（Ｂ）のＣ−Ｃ矢示図、（Ｄ）は（Ｂ）のＤ−Ｄ矢示図である。
【図２】 第２実施形態を示す立断面図である。
【図３】 マンドレルの他の例を示す平面図である。
【図４】 第３実施形態を示す要部の立断面図である。
【図５】 （Ａ）（Ｂ）はマンドレルの他の２例を示す平面図である。
【符号の説明】
１ 板状又はブロック状製品の成形装置
３ 圧力容器
６ 上パンチ
７ 下パンチ
１０ マンドレル
１２ 平面部分
１３ 処理室
１４ 粉体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molding apparatus for plate-like or block-like products, and more specifically, a plurality of plate-like or block-like products by a single press treatment by a rubber press (dry CIP) having a mandrel (mandrel). It is related with the apparatus which obtains.
[0002]
[Prior art]
There is a cold isostatic pressing (CIP) molding method as one of the pressure compression molding of powders of metals, ceramics, etc. Among them, dry (Dry Duck) CIP equipment is molded with a rubber septum. There is an advantage that the pressure medium does not adhere to the molded body when it is separated from the body, Japanese Utility Model Laid-Open No. 62-198230 (conventional example 1) and Japanese Patent Application Laid-Open No. 1-154707 (conventional example). 2) etc.
[0003]
[Problems to be solved by the invention]
In the conventional example 1, it is possible to form a large number of plate-shaped or block-shaped molded bodies (plate-shaped or block-shaped products) by one pressurizing treatment, but there are the following problems.
(1): Since the contact surface of the molded body is a rubber or soft film partition material, the dimensional accuracy of the molded body (particularly the flatness as a plate material) is poor, which increases the machining cost and increases the product yield. It was getting worse.
[0004]
(2): Since the molding dies are multi-stacked, the mounting of the rubber mold and the mounting of the partition material is required every time the powder is filled, and the productivity is low.
(3); For the same reason as in the previous (2), it took time to handle the molded body. Conventional example 2 is a multilayer molding technique for plate-like products or cylindrical products, and has the following problems.
[0005]
(1): Only one product could be molded per mold, and the productivity was low.
(2): Since all surfaces except the one surface (rubber part) in contact with the powder are molds, burrs, that is, elephant foot phenomenon occur above and below the molded body, which causes flack during firing. In addition, handling was difficult.
[0006]
(3): The powder packing density is likely to be uneven, and when the mold (side surface) is thin, the mold may be bent during the pressure treatment, resulting in deformation. In order to prevent this, the mold must have a certain degree of rigidity (thickness), and when the size (size) of the molded body increases, the weight becomes excessive and handling is difficult.
The present invention solves the above-mentioned problems of the prior art by a rubber press (dry CIP) having a mandrel (mandrel), and has high productivity (many picking, easy powder filling and handling) and high precision ( It is an object of the present invention to provide an apparatus for forming a plate-like or block-like product capable of achieving a flatness or a good shape of the plate-like or block-like product.
[0007]
Here, the plate-like product means a plate material having a cross-sectional square shape, a cross-sectional curved shape, a cross-sectional meniscus shape, and the like, and the block-like product means a member having a high ratio of thickness to length / width.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention takes the following technical means. That is, the molding apparatus for plate-like or block-like products according to claim 1 includes a metal mandrel provided in the lower punch so as to be detachable in a processing chamber surrounded by a rubber mold and upper and lower punches. to form two places or more planar portions spaced on the outer periphery in the circumferential direction of the mandrel, the flat surface portion and the rubber mold and at two points or more plate-shaped or block-shaped processing chamber has defining plate or block-shaped An apparatus for molding a product, wherein an upper punch is removably attached to an upper part of a rubber mold and a mandrel so as to be filled with powder from the upper side of the processing chamber, and the powder filled in the processing chamber is passed through a rubber mold. It is configured so that the mandrel in a state where a plate-like or block-like product is formed after pressure reduction after being pressure-molded with isotropic pressure can be extracted together with the lower punch with respect to the rubber mold and the upper punch. It is characterized by That.
[0009]
By adopting such a configuration, a plurality of plate-like or block-like products can be pressure-molded by a single pressure treatment, and the flat part of the plate-like or block-like product is made of a flat portion of the mandrel. Since it functions as a mold and is easily deformed, the flatness is good, and powder filling by an in-line method (with the upper punch removed) is facilitated.
[0010]
The present invention according to claim 2 is characterized in that, in the configuration of claim 1 described above, the planar portion formed on the outer periphery of the mandrel is a curved surface shape or a groove shape. By adopting such a configuration, the cross-sectional shape of the plate-like or block-like product can be easily formed into a curved shape or a half-moon shape (including a three-month shape) in addition to a square shape.
[0011]
Furthermore, in the present invention according to claim 3, in the configuration of claim 1 or 2 described above, the contact portion of one or both of the upper and lower punches with the powder is constituted by an elastic spacer. By adopting such a configuration, the metal (ceramics) powder (powder) is in contact with the elastic material (rubber) except for the flat part of the mandrel during the pressing process. It is difficult for burrs (elephant foot phenomenon) to occur at the end of the body (plate-like or block-like product). Therefore, cracks during firing in the subsequent process can be prevented, and handling is also improved.
[0012]
The present invention according to claim 4 is characterized in that, in the configuration of claims 1 to 3 described above, the mandrel has a tapered shape with a large downward diameter. When the mandrel is pulled out from the rubber mold after pressure molding and when it is handled (transferred) after being pulled out, it can prevent the molded body from falling down due to the tapered shape. Ru Nodea the unmanned become easy of transport) to like.
[0013]
Na us, by mounting the detachable mandrel lower punch (conversion freely), pressing a plate or block-shaped product other components in the pressure molding of the cylindrical molded body by using a mandrel (Rubber Mold, pressure vessel, upper / lower punch, etc.) can be shared.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a plate-shaped or block-shaped product forming apparatus (dry CIP apparatus) according to the present invention will be described with reference to the drawings.
[0015]
1 (A), (B), (C), and (D) show the first embodiment. In FIG. 1 (A), the molding apparatus 1 adds a pressure medium (water, oil, rust preventive lubricant). A cylindrical pressure vessel 3 having an introduction / discharge port 2 for emulsion liquid, ethylene glycol, etc., and an annular upper lid 4 and lower lid 5 fitted and fixed to upper and lower openings of the pressure vessel 3, The upper and lower punches 6 and 7 are detachably fitted to the upper and lower lids 4 and 5, and the double cylindrical pressure rubber mold 8 and the molded rubber are mounted in the pressure vessel 3. A mold 9 (hereinafter simply referred to as a rubber mold 9), and a metal mandrel 10 provided in the lower punch 7 so as to be detachable from a processing chamber surrounded by the rubber mold 9 and the upper and lower punches 6 and 7. The axial force at the time of the isotropic pressure pressurizing process with the pressure medium is detachably engaged with the end faces 6A and 7A of the upper and lower punches 6 and 7. It is mainly composed of a less frame 11.
[0016]
Although not shown in the drawing, the pressure medium introduction / discharge port 2 is naturally provided with a pressure reducing device (a combination of a piston, a cylinder and a check valve) and a pressure reducing mechanism. The mandrel 10 has two or more planar portions 12 (two opposite to each other in the figure) on its outer periphery, and the planar portion 12 and the rubber mold 9 form two or more plate-like or block-like shapes. A processing chamber 13 is defined, and a powder 14 made of metal, ceramics, or the like filled in the processing chamber 13 is press-molded with an isotropic pressure through a rubber mold 9.
[0017]
The upper punch 6 is formed with a positioning recess 6B of the mandrel 10 at the center thereof, and the upper end portion of the mandrel 10 can be inserted into and removed from the recess 6B, and the outer peripheral edge of the recess 6B is provided with a step portion. A contact portion 15 with the powder is formed. A mandrel 10 is provided on the lower punch 7 so as to be detachable. A contact portion 16 is formed on the periphery of the lower punch 7 below the mandrel 10 through a stepped portion. The lower punch 7 has a mandrel. The mandrel 10 can be inserted into and removed from the processing chamber by a lifter device (not shown) in a state where the 10 is erected.
[0018]
The operation of the first embodiment described above will be described. When the mandrel 10 is inserted and set using a lifter device or the like with the press frame 11 detached, the processing chambers 13 are defined at two opposite positions in the figure. The powder 14 is filled from the upper side of the processing chamber 13 in the state in which the punch 6 is pulled out. When this filling is completed, the upper punch 6 is fitted into the upper lid 4 and the recess 6B is put on the mandrel 10 and the press frame 11 is attached. The upper and lower punches 6 and 7 are engaged with the end faces 6A and 7A, and the pressurization preparation is completed here.
[0019]
When the pressure medium from the pressure generator is introduced into the pressure vessel 3 through the inlet / outlet 2, the powder 14 filled in the processing chamber 13 through the rubber mold 9 is applied by isotropic pressure. Pressure molding (compression molding) is performed, and the axial force at this time is carried by the press frame 11. When pressure molding with a predetermined isotropic pressure is finished, the pressure is reduced to restore the rubber mold 9 (expanded diameter), the press frame 11 is detached, and the lower punch 7 is extracted by a lifter device or the like. 1 (B) and (C), two plate-like or block-like products 17 in which powder is compression-molded are formed in the illustrated example, and the product 17 has good flatness due to the flat portion 12 by the mandrel 10. It is a thing.
[0020]
The product 17 is handled in a later process (for example, a firing process), and the mandrel 10 from which the product 17 has been released (released) is reset in the pressure vessel 3 via a lifter device or the like. FIG. 2 shows a second embodiment of a molding apparatus according to the present invention, in which elastic spacers 18 and 19 such as rubber are mounted as upper and lower contact portions, and other configurations and operations are basically as described above. Common parts are denoted by common reference numerals because they are common to the first embodiment.
[0021]
In the second embodiment, when the powder 14 filled in the processing chamber 13 is pressurized with isotropic pressure, the contact portions 15 and 16 do not contract when the upper and lower contact portions are made of metal. (Elephant foot phenomenon) may occur. Therefore, the elastic spacers 18 and 19 are attached to prevent the elephant foot from being generated. In addition to eliminating the cause of cracks in powder, it prevents the yield of powder materials from decreasing.
[0022]
Therefore, the elastic spacers 18 and 19 are preferably mounted up and down as shown in the figure, but can be mounted on either the top or bottom. 3 and 5A and 5B, the flat surface portion 12 formed on the mandrel 10 has a curved surface shape as shown in FIG. 3, and a groove shape as shown in FIG. 5B. Alternatively, two or more (four in the figure) can be formed as shown in FIG.
[0023]
In the illustrated example, the planar portion 12 is formed over the entire length of the mandrel 10 in the axial direction. However, a plurality of plane portions 12 are formed at intervals in the axial direction of the mandrel 10 (this may be divided in the circumferential direction). You may do it. However, when the plane portions are formed at intervals in the axial direction, this may be avoided by a tapping process or the like although there is some difficulty in filling the powder.
[0024]
FIG. 4 shows a main part of a third embodiment of the molding apparatus according to the present invention, in which the mandrel 10 is formed in a tapered shape having a large downward diameter, and the other configurations and operations are the same as described above. It is. According to the third embodiment, when the handling time and withdrawn by withdrawing the mandrel 10 with a predetermined pressure treatment is completed, because the mandrel 10 is tapered, Ru Nodea the like falling products can be prevented.
[0025]
Et al is, although the above-described embodiments are those relating to molding apparatus either plate-shaped products, high proportion of the thickness to the length and width, the block-like rather than a plate-like shape (rectangular parallelepiped shape or the like) The present invention can also be applied to a molding apparatus for molding a product having the shape of
[0026]
【The invention's effect】
As described above in detail, according to the present invention, high productivity and high accuracy of a plate-like or block-like product using a dry CIP apparatus can be realized.
[Brief description of the drawings]
1A and 1B show a first embodiment of a molding apparatus for plate-like or block-like products according to the present invention, in which FIG. 1A is an elevational sectional view, FIG. 1B is a sectional view during handling, and FIG. The CC arrow figure of (D) is a DD arrow figure of (B).
FIG. 2 is an elevational sectional view showing a second embodiment.
FIG. 3 is a plan view showing another example of a mandrel.
FIG. 4 is an elevational sectional view of an essential part showing a third embodiment.
FIGS. 5A and 5B are plan views showing other two examples of mandrels. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Molding apparatus of plate-shaped or block-shaped product 3 Pressure vessel 6 Upper punch 7 Lower punch 10 Mandrel 12 Planar part 13 Processing chamber 14 Powder

Claims (4)

ゴム型および上・下パンチで囲まれた処理室に挿脱自在として上記下パンチに備えられている金属製のマンドレルを備え、該マンドレルの外周に周方向に離れた２ヶ所以上の平面部分を形成し、該平面部分とゴム型とで２ヶ所以上の板状又はブロック状処理室を画成した板状又はブロック状製品の成形装置であって、
上記処理室の上側から粉体を充填すべくゴム型およびマンドレルの上部に対して上パンチを抜出し可能に取付け、上記処理室に充填した粉体をゴム型を介して等方圧で加圧成形した後の減圧後に板状又はブロック状製品が形成された状態のマンドレルをゴム型および上パンチに対して上記下パンチと一緒に抜出し可能に構成されていることを特徴とする板状又はブロック状製品の成形装置。 A metal mandrel provided in the lower punch is detachably inserted into a processing chamber surrounded by a rubber mold and upper and lower punches, and two or more plane portions separated in the circumferential direction are provided on the outer periphery of the mandrel. A plate-shaped or block-shaped product forming apparatus that defines two or more plate-shaped or block-shaped processing chambers with the planar portion and the rubber mold ,
The upper punch is attached to the rubber mold and the upper part of the mandrel so as to be filled with powder from the upper side of the processing chamber, and the powder filled in the processing chamber is pressure-molded with isotropic pressure through the rubber mold. A plate or block that is configured such that a mandrel in a state where a plate or block product is formed after decompression can be extracted together with the lower punch with respect to the rubber mold and the upper punch. Molded product molding equipment. マンドレルの外周に形成した平面部分が、曲面形状又は溝形状であることを特徴とする請求項１記載の板状又はブロック状製品の成形装置。2. A plate-shaped or block-shaped product forming apparatus according to claim 1, wherein the flat portion formed on the outer periphery of the mandrel has a curved surface shape or a groove shape. 上・下パンチの一方又は両方の粉体との接触部を、弾性スペーサで構成していることを特徴とする請求項１又は２に記載の板状又はブロック状製品の成形装置。The plate-shaped or block-shaped product forming apparatus according to claim 1 or 2, wherein a contact portion of one or both of the upper and lower punches with the powder is constituted by an elastic spacer. マンドレルが下向径太のテーパー形状とされていることを特徴とする請求項１〜３のいずれかに記載の板状又はブロック状製品の成形装置。The plate-like or block-shaped product forming apparatus according to any one of claims 1 to 3, wherein the mandrel has a tapered shape with a large downward diameter.
JP20078398A 1998-07-15 1998-07-15 Molding device for plate or block products Expired - Fee Related JP3734958B2 (en)

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