JP4494025B2 - Dry cold isostatic pressurizer - Google Patents

Dry cold isostatic pressurizer Download PDF

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JP4494025B2
JP4494025B2 JP2004012281A JP2004012281A JP4494025B2 JP 4494025 B2 JP4494025 B2 JP 4494025B2 JP 2004012281 A JP2004012281 A JP 2004012281A JP 2004012281 A JP2004012281 A JP 2004012281A JP 4494025 B2 JP4494025 B2 JP 4494025B2
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valve body
housing recess
body housing
upper lid
molding
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JP2005205427A (en
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泰秀 宮下
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Kobe Steel Ltd
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Description

本発明は、セラミックスの成形や粉末冶金の分野に利用される乾式冷間等方圧加圧装置に関するものである。   The present invention relates to a dry and cold isostatic pressing apparatus used in the fields of ceramic molding and powder metallurgy.

乾式冷間等方圧加圧装置 (以下単に「乾式ＣＩＰ装置」という) は、予め圧力容器内に組み込んだゴム型を介して被処理体を加圧成形する方法で、粉末の充填、加圧、成形品の取り出しを液体に触れることなく行なうことができるため、自動化が容易で大量生産に適したものとされている（特許文献１参照）。
この種の乾式ＣＩＰ装置は、縦型の筒形に形成された成形容器と、この上部開口を塞ぐ上蓋と、成形容器の下部開口を塞ぐ下蓋とを有しており、この成形容器の内側には、加圧ゴム型を介して筒形の成形ゴム型が周設されている。上蓋は中空形をした上蓋枠の枠内に上パンチが設けられた内外二重構造とされ、また同じく下蓋も、中空形をした下蓋枠の枠内に下パンチが設けられた内外二重構造とされている。そして、上パンチが成形ゴム型の上部開口に所定量内嵌され、また下パンチが成形ゴム型の下部開口に所定量内嵌されることにより、これら上パンチ、成形ゴム型、下パンチで囲まれた被処理体用の成形室が形成されるようになっている。 A dry cold isostatic pressure press (hereinafter simply referred to as “dry CIP device”) is a method of press-molding an object to be processed through a rubber mold previously incorporated in a pressure vessel. Since the molded product can be taken out without touching the liquid, it is easy to automate and is suitable for mass production (see Patent Document 1).
This type of dry CIP apparatus has a molding container formed in a vertical cylindrical shape, an upper lid that closes the upper opening, and a lower lid that closes the lower opening of the molding container. A cylindrical rubber mold is provided around the pressure rubber mold. The upper lid has an internal / external double structure in which an upper punch is provided in the frame of the hollow upper lid frame. Similarly, the lower lid is also an inner / outer two frame in which the lower punch is provided in the frame of the hollow lower lid frame. It has a heavy structure. The upper punch is fitted into the upper opening of the molding rubber mold by a predetermined amount, and the lower punch is fitted into the lower opening of the molding rubber mold by a predetermined amount, so that the upper punch, the molding rubber mold, and the lower punch are surrounded. A molding chamber for the processed object is formed.

この乾式ＣＩＰ装置では、乾式ＣＩＰ処理を終わった段階で被処理体を下パンチと共に下方へ取り出せるようになっているが、上パンチを成形ゴム型に対して気密的に内嵌させたままの構造では、空気の通り道がないことから被処理体の取り出しが遅くなり、このことが要因でサイクルタイムが長引く問題に繋がることになる。そこで、本出願人は、上蓋に対して成形室と容器外とを連通させる通気孔を設けると共に、この上蓋の下面側に弁体を接離自在に設けて、この弁体の外周面と成形ゴム型の内周面との間に空気流通可能な間隙を保持させるようにした乾式ＣＩＰ装置を提案している（上記の特許文献１）。
特開平５−３３００５号公報 In this dry type CIP apparatus, the object to be processed can be taken out together with the lower punch at the stage when the dry type CIP processing is finished, but the structure in which the upper punch is airtightly fitted into the molding rubber mold. Then, since there is no air passage, the removal of the object to be processed is delayed, which leads to the problem that the cycle time is prolonged. Therefore, the present applicant provides a vent hole that allows the molding chamber and the outside of the container to communicate with the upper lid, and a valve body is provided on the lower surface side of the upper lid so that the valve body can be contacted and separated. A dry CIP device has been proposed in which a gap allowing air to flow is maintained between the inner peripheral surface of a rubber mold (Patent Document 1 above).
Japanese Patent Laid-Open No. 5-33005

本出願人が先に提案した乾式ＣＩＰ装置（特許文献１参照）において、弁体の外周面と成形ゴム型の内周面との間に形成される間隙は微小隙間とせざるを得ないが、成形室内で高圧が発生することに伴い、この高圧の影響を受けて圧縮された成形ゴム型が間隙に入り込んでしまうということがあり、成形ゴム型が損傷する（食われを起こす）ことがあった。また、このように成形ゴム型に損傷が出た場合や間隙にゴム詰まりが起こったりした場合、間隙での空気流通不良に繋がるという問題もあり、これらについて更なる改良の余地を残すものであった。   In the dry CIP device previously proposed by the present applicant (see Patent Document 1), the gap formed between the outer peripheral surface of the valve body and the inner peripheral surface of the molded rubber mold must be a minute gap, As a high pressure is generated in the molding chamber, the molded rubber mold compressed under the influence of this high pressure may enter the gap, and the molded rubber mold may be damaged (causes erosion). It was. In addition, if the molded rubber mold is damaged or rubber clogging occurs in the gap, there is a problem that it leads to poor air flow in the gap, leaving room for further improvement. It was.

本発明は、上記事情に鑑みてなされたものであって、乾式ＣＩＰ処理後に被処理体の取り出しが容易且つ迅速に行え、成形ゴム型の損傷なども防止できるようにした乾式冷間等方圧加圧装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and it is possible to easily and quickly remove an object to be processed after dry CIP processing, and to prevent damage to a molded rubber mold, etc. An object is to provide a pressurizing device.

前記目的を達成するために、本発明は次の手段を講じた。
即ち、本発明に係る乾式冷間等方圧加圧装置(乾式ＣＩＰ装置)１は、
縦型の筒形に形成された成形容器２内に同じく筒形に形成された成形ゴム型６が内装され、成形容器２の上部開口に上蓋３が設けられると共に成形容器２の下部開口に下蓋４が設けられることで成形ゴム型６の内側にその上下両端が閉塞された被処理体１５の成形室１６が形成可能となったものであって、上蓋３には、その下面に下向きに開口し且つ開口内上面を備えた弁体収納凹部３０が設けられていると共に、この弁体収納凹部３０内で外気に通ずる通気孔４０が設けられている。この弁体収納凹部３０には、上蓋３の下面（弁体収納凹部３０の開口まわり）と面一状態で収納可能となる弁体３１が設けられている。そして、この上蓋３の弁体収納凹部３０と弁体３１とが互いに下向きに末広がりのテーパ嵌合をする形状に形成されてなり、この弁体３１が弁体収納凹部３０から所定量だけ下降することで、初めてこの弁体３１の外周面と弁体収納凹部３０の開口周部との間隙Ｇ及び弁体収納凹部３０内及び通気孔４０を介して、成形室１６に対する外気の流通路が形成可能になっている。 In order to achieve the above object, the present invention has taken the following measures.
That is, the dry cold isostatic pressurizing device (dry CIP device) 1 according to the present invention is:
A molded rubber mold 6 that is also formed into a cylindrical shape is housed inside a molded container 2 that is formed into a vertical cylindrical shape, and an upper lid 3 is provided at the upper opening of the molded container 2 and at the lower opening of the molded container 2 By providing the lid 4, the molding chamber 16 of the workpiece 15 whose upper and lower ends are blocked can be formed inside the molded rubber mold 6, and the upper lid 3 has its lower surface facing downward. A valve body housing recess 30 that is open and has an upper surface inside the opening is provided, and a vent hole 40 that communicates with the outside air is provided in the valve body housing recess 30. The valve body storage recess 30 is provided with a valve body 31 that can be stored flush with the lower surface of the upper lid 3 (around the opening of the valve body storage recess 30). And the valve body accommodation recessed part 30 and the valve body 31 of this upper cover 3 are formed in the shape which carries out taper fitting which spreads downward toward each other, and this valve body 31 descend | falls only a predetermined amount from the valve body accommodation recessed part 30. Thus, for the first time, a flow path for the outside air to the molding chamber 16 is formed through the gap G between the outer peripheral surface of the valve body 31 and the opening peripheral portion of the valve body housing recess 30 and the inside of the valve body housing recess 30 and the vent hole 40. It is possible.

このような構成であると、乾式ＣＩＰ処理を終わった段階で被処理体１５を成形室１６の下方へ取り出す場合に、それまで上蓋３の弁体収納凹部３０内に収納されていた弁体３１が所定量だけ下降するようになる。このとき、弁体３１の外周面と弁体収納凹部３０の開口周部との間に間隙Ｇが生じ、この間隙Ｇが弁体収納凹部３０の内部に設けられた通気孔４０内と連通することになる。すなわち、成形室１６内と外気との間が、間隙Ｇ及び弁体収納凹部３０内及び通気孔４０を介して形成される流通路によって連通することになる。   With such a configuration, when the workpiece 15 is taken out below the molding chamber 16 after the dry CIP process is finished, the valve body 31 that has been housed in the valve body housing recess 30 of the upper lid 3 until then. Is lowered by a predetermined amount. At this time, a gap G is formed between the outer peripheral surface of the valve body 31 and the opening peripheral portion of the valve body housing recess 30, and this gap G communicates with the inside of the vent hole 40 provided in the valve body housing recess 30. It will be. That is, the inside of the molding chamber 16 and the outside air communicate with each other through the gap G, the valve body housing recess 30 and the flow passage formed through the vent hole 40.

そのため、成形室１６（後述の実施形態では上蓋３の下面と上部ゴム栓１８の上面との上下間、及び成形室１６の内周面とゴム筒１７の外周面との周間）に外気が入り込み、成形室１６からの被処理体１５の下部取り出しが容易且つ迅速に行われることになる。なお、弁体３１は、成形室１６内において高圧で乾式ＣＩＰ処理が行われている間は弁体収納凹部３０内に完全に収納され、これによって上蓋３の下面と弁体３１の下面とは面一になっているため、乾式ＣＩＰ処理にとって不都合はない。   Therefore, outside air is in the molding chamber 16 (in the embodiment described later, between the upper and lower surfaces of the lower surface of the upper lid 3 and the upper surface of the upper rubber stopper 18 and between the inner peripheral surface of the molding chamber 16 and the outer peripheral surface of the rubber cylinder 17). Intrusion and removal of the lower part of the workpiece 15 from the molding chamber 16 are performed easily and quickly. The valve body 31 is completely accommodated in the valve body accommodating recess 30 while the high pressure dry CIP process is performed in the molding chamber 16, whereby the lower surface of the upper lid 3 and the lower surface of the valve body 31 are separated from each other. Since they are flush, there is no inconvenience for dry CIP processing.

また、弁体３１が弁体収納凹部３０に収納されたときにおける両者間のシール性（間隙Ｇを閉ざす精度）が向上する。このことは成形ゴム型６の損傷（食われ等）を防止・抑制するうえで有益である。
この場合、上蓋３の弁体収納凹部３０と弁体３１とに形成される末広がりのテーパ嵌合用形状は、弁体収納凹部３０に設けられるテーパ角よりも弁体３１に設けられるテーパ角の方が緩い角度になるように形成するのが好適である。このようにすると、弁体３１が弁体収納凹部３０に収納された状態での両者間のシール性を実現させやすい。すなわち、上蓋３に対する弁体収納凹部３０の形成や、弁体３１の製作が容易になる。また、上蓋３と弁体３１とを同質金属材で形成した場合、両者の当たり（接触）に伴う損傷を防止乃至は可及的に小さく抑えることができる点で有益となる。 Further , the sealing performance (accuracy for closing the gap G) between the two when the valve body 31 is housed in the valve body housing recess 30 is improved. This is useful in preventing / suppressing damage (eating etc.) of the molded rubber mold 6.
In this case, the taper fitting shape of the divergent taper formed in the valve body housing recess 30 and the valve body 31 of the upper lid 3 is more tapered than the taper angle provided in the valve body housing recess 30. It is preferable to form so as to have a gentle angle. If it does in this way, it will be easy to implement | achieve the sealing performance between both in the state in which the valve body 31 was accommodated in the valve body accommodating recessed part 30. FIG. That is, formation of the valve body housing recess 30 with respect to the upper lid 3 and manufacture of the valve body 31 are facilitated. Further, when the upper lid 3 and the valve body 31 are formed of the same metal material, it is advantageous in that damage due to contact (contact) between them can be prevented or suppressed as small as possible.

上蓋３に対し、弁体収納凹部３０の内部で上下に貫通する軸孔３３を設けておき、この軸孔３３に吊り軸３２を上下動自在な状態で設けておく。そして、この吊り軸３２の下端部に弁体３１を連結させればよい。このような構造が簡潔である。この場合、軸孔３３の内周面と吊り軸３２の外周面との周間には、弁体３１の上下動に伴って吊り軸３２が軸孔３３内を上下動する範囲内においてＯリング３７が設けられているものとしておくのが好適である。このようにすることで、無用な空気漏れを防止できる。なお、Ｏリング３７は、吊り軸３２の外周面側としても、或いは軸孔３３の内周面側としてもよい。   A shaft hole 33 penetrating vertically inside the valve body housing recess 30 is provided in the upper lid 3, and a suspension shaft 32 is provided in the shaft hole 33 so as to be movable up and down. Then, the valve body 31 may be connected to the lower end portion of the suspension shaft 32. Such a structure is simple. In this case, an O-ring is provided between the inner peripheral surface of the shaft hole 33 and the outer peripheral surface of the suspension shaft 32 within a range in which the suspension shaft 32 moves up and down in the shaft hole 33 as the valve body 31 moves up and down. It is preferable that 37 is provided. In this way, unnecessary air leakage can be prevented. The O-ring 37 may be on the outer peripheral surface side of the suspension shaft 32 or on the inner peripheral surface side of the shaft hole 33.

本発明に係る乾式冷間等方圧加圧装置では、乾式ＣＩＰ処理後に被処理体の取り出しを容易且つ迅速に行えるものとなる。また、成形ゴム型の損傷なども防止できる。   In the dry cold isostatic pressing apparatus according to the present invention, the object to be processed can be easily and quickly taken out after the dry CIP process. In addition, damage to the molded rubber mold can be prevented.

以下、本発明の実施の形態を、図面に基づき説明する。
図１乃至図７は、本発明に係る乾式冷間等方圧加圧装置(乾式ＣＩＰ装置)１の一実施形態を示している。この乾式ＣＩＰ装置１は、縦型の筒形に形成された成形容器２と、この成形容器２の上部開口を塞ぐ上蓋３と、成形容器２の下部開口を塞ぐ下蓋４とを有している。成形容器２の内側には、この成形容器２の筒形に対して相似的に小さい筒形の加圧ゴム型５及び成形ゴム型６が二重筒形に内装されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 thru | or FIG. 7 has shown one Embodiment of the dry-type cold isostatic pressurization apparatus (dry CIP apparatus) 1 which concerns on this invention. The dry CIP device 1 has a molded container 2 formed in a vertical cylindrical shape, an upper lid 3 that closes an upper opening of the molded container 2, and a lower lid 4 that closes a lower opening of the molded container 2. Yes. Inside the molded container 2, a cylindrical pressure rubber mold 5 and a molded rubber mold 6 which are similar in size to the cylindrical shape of the molded container 2 are housed in a double cylinder shape.

加圧ゴム型５は、成形容器２の内周面との間に、周方向には連続するが上部及び下部を閉鎖して上下方向への圧力漏洩は阻止する周空間７を形成させており、成形容器２には、この周空間７へ向けて圧力媒体を出し入れする圧力導入孔８が設けられている。
上蓋３は下になるほど径小となる段付き軸形に形成されており、最も上位側の露出部分３ａが成形容器２の上部でその上周端面に気密的に当接し、中間の中込め部分３ｂが成形容器２の上部開口内及び加圧ゴム型５の上部開口内に対して気密的に内嵌され、最も下位側の先端部分３ｃが成形ゴム型６の上周端面に当接しつつその上部開口にも所定量内嵌されて気密性を保持するようになっている。 The pressure rubber mold 5 is formed between the inner peripheral surface of the molding container 2 and a circumferential space 7 which is continuous in the circumferential direction but closes the upper and lower portions to prevent pressure leakage in the vertical direction. The molding container 2 is provided with a pressure introduction hole 8 through which a pressure medium is taken in and out toward the peripheral space 7.
The upper lid 3 is formed in a stepped shaft shape that becomes smaller in diameter toward the lower side, and the uppermost exposed portion 3a is in airtight contact with the upper peripheral end surface at the upper portion of the molding container 2, and the intermediate recessed portion 3b is airtightly fitted in the upper opening of the molding container 2 and the upper opening of the pressure rubber mold 5, and the lowermost tip portion 3c is in contact with the upper peripheral end surface of the molding rubber mold 6 A predetermined amount is also fitted into the upper opening to maintain airtightness.

これに対し、下蓋４は上になるほど径小となる段付き軸形に形成されており、最も下位側の露出部分４ａが成形容器２の下部でその下周端面に気密的に当接し、中間の中込め部分４ｂが成形容器２の下部開口内及び加圧ゴム型５の下部開口内に対して気密的に内嵌され、最も上位側の先端部分４ｃが成形ゴム型６の下周端面に当接しつつその下部開口にも所定量内嵌されて気密性を保持するようになっている。   On the other hand, the lower lid 4 is formed in a stepped shaft shape that becomes smaller in diameter as it goes up, and the lowermost exposed portion 4a comes into airtight contact with its lower peripheral end surface at the lower portion of the molding container 2, The intermediate filling portion 4 b is fitted in a gastight manner in the lower opening of the molding container 2 and the lower opening of the pressure rubber mold 5, and the uppermost tip portion 4 c is the lower peripheral end surface of the molding rubber mold 6. A predetermined amount is also fitted into the lower opening of the lower opening while keeping in contact with the air, so as to maintain airtightness.

このようなことから、上蓋３の先端部分３ｃ、成形ゴム型２、下蓋４の先端部分４ｃにより囲まれる被処理体１５用の成形室１６が形成されることになる。なお、図例において被処理体１５はゴム筒１７とその上面及び下面を閉鎖するゴム栓１８，１９とによって囲まれた状態で成形室１６内へ装填された状況を示してある。
ただ、上記した下蓋３は、中空形をした下蓋枠２０の枠内に下パンチ２１が設けられた内外二重構造とされており、下パンチ２１は下蓋枠２０の上下方向に貫通して上下動自在になっている。この下蓋枠２０から下パンチ２１が僅かに突出する状態となったときに、この突出部分により、下蓋４としての先端部分４ｃが形成されるようになっている。 For this reason, a molding chamber 16 for the object to be processed 15 surrounded by the tip portion 3c of the upper lid 3, the molding rubber mold 2, and the tip portion 4c of the lower lid 4 is formed. In the example shown in the figure, the object 15 is loaded into the molding chamber 16 while being surrounded by the rubber cylinder 17 and the rubber plugs 18 and 19 that close the upper and lower surfaces thereof.
However, the above-described lower lid 3 has an internal / external double structure in which the lower punch 21 is provided in the hollow lower lid frame 20, and the lower punch 21 penetrates the lower lid frame 20 in the vertical direction. And it can move up and down. When the lower punch 21 slightly protrudes from the lower lid frame 20, a tip portion 4c as the lower lid 4 is formed by the protruding portion.

そして、このうち下蓋枠２０は成形容器２側に固定され、下パンチ２１だけが成形容器２に対して上下動する状態になっている。この下パンチ２１は昇降台２２に載って上下動される。すなわち、図２に示すように、この下パンチ２１（成形室１６の下面を形成している先端部分４ｃ）の下降により、成形室１６から被処理品１５をゴム筒１７及び上下のゴム栓１８，１９ごと、容器外へ取り出すことができるようになっている。   Of these, the lower lid frame 20 is fixed to the molding container 2 side, and only the lower punch 21 moves up and down with respect to the molding container 2. The lower punch 21 is moved up and down on the lifting platform 22. That is, as shown in FIG. 2, the lower punch 21 (the tip portion 4 c forming the lower surface of the molding chamber 16) is lowered to move the workpiece 15 from the molding chamber 16 to the rubber cylinder 17 and the upper and lower rubber plugs 18. , 19 can be taken out of the container.

上蓋３には、その下面（下位段部３ｃの端面）に下向きに開口する弁体収納凹部３０が設けられており、この弁体収納凹部３０には弁体３１が設けられている。この弁体３１は、上蓋３を上下貫通して設けられる吊り軸３２によって吊り下げられた状態にある。すなわち、上蓋３にはこの吊り軸３２を挿通させるための軸孔３３が、弁体収納部３０の内側となる位置で上下貫通して設けられている。吊り軸３２は軸孔３３内で上下動自在となっており、その上端部には抜け止め部３４が設けられて上蓋３から抜け落ちることは防止されている。   The upper lid 3 is provided with a valve body housing recess 30 that opens downward on the lower surface (end surface of the lower step portion 3 c). The valve body housing recess 30 is provided with a valve body 31. The valve body 31 is in a state of being suspended by a suspension shaft 32 provided vertically through the upper lid 3. That is, the upper lid 3 is provided with a shaft hole 33 through which the suspension shaft 32 is inserted so as to penetrate vertically at a position inside the valve body storage unit 30. The suspension shaft 32 is movable up and down within the shaft hole 33, and a retaining portion 34 is provided at an upper end portion thereof to prevent the suspension shaft 32 from falling off the upper lid 3.

図例ではこの吊り軸３２にボルトを用いたものとしてあり、この吊り軸３２の下端部（雄ねじ端部）を弁体３１に螺合することによって直接、弁体３１と連結してある。なお、吊り軸３２を設ける本数は特に限定されるものではなく、例えば図７に示すように、弁体３１の上面を円形とする場合において、その円形中心から径方向距離及び相互間角度が等しい４箇所にそれぞれ１本ずつ（計４本）配置させるようにすればよい。   In the illustrated example, a bolt is used for the suspension shaft 32, and the lower end portion (male screw end portion) of the suspension shaft 32 is directly connected to the valve body 31 by being screwed to the valve body 31. The number of the suspension shafts 32 is not particularly limited. For example, as shown in FIG. 7, when the upper surface of the valve body 31 is circular, the radial distance and the mutual angle are equal from the circular center. What is necessary is just to arrange | position one each in four places (a total of four).

弁体収納凹部３０は末広がりのテーパ孔とされている。これに対して弁体３１も末広がりのテーパコーン形に形成されている。そして、弁体収納凹部３０の最大開口直径と、弁体３１の最大直径は、略等しく形成されている。そのため弁体収納凹部３０内へ弁体３１が収納されることにより両者は互いに末広がりのテーパ嵌合をするようになっている。そしてこの収納時（テーパ嵌合時）には、弁体収納凹部３０と弁体３１との間で気密的なシール性が得られたうえで、且つ、上蓋３の下面に対して弁体３１の下面が面一になる状態が得られるようにしてある。   The valve body housing recess 30 is a tapered hole that widens toward the end. On the other hand, the valve body 31 is also formed in a tapered cone shape that widens toward the end. And the maximum opening diameter of the valve body accommodation recessed part 30 and the maximum diameter of the valve body 31 are formed substantially equal. For this reason, the valve body 31 is stored in the valve body storage recess 30, so that they both have a taper fit that widens toward the end. At the time of storage (when the taper is fitted), an airtight seal is obtained between the valve body storage recess 30 and the valve body 31 and the valve body 31 against the lower surface of the upper lid 3. A state is obtained in which the lower surface of the surface is flush.

なお、このときの気密的シール性は、弁体収納凹部３０の開口内周面と弁体３１の外周面との間で面接触状態又は下端位置の周方向でエンドレスとなる線接触状態とさせることで得るのもよいが、好ましくは、弁体収納凹部３０のテーパ孔に採用するテーパ角に比べて弁体３１のテーパコーン形に採用するテーパ角の方を緩くさせて（図６参照）、弁体収納凹部３０の開口内上面と弁体３１の上面とで面接触させることで（シール性を）得るようにすればよい。これにより、製作の容易化が図れる。   In addition, the airtight sealing property at this time is a surface contact state between the inner peripheral surface of the opening of the valve body housing recess 30 and the outer peripheral surface of the valve body 31 or a line contact state that is endless in the circumferential direction of the lower end position. Preferably, the taper angle employed in the tapered cone shape of the valve body 31 is made looser than the taper angle employed in the tapered hole of the valve body housing recess 30 (see FIG. 6). What is necessary is just to obtain it by making surface contact with the upper surface of the opening of the valve body accommodation recessed part 30 and the upper surface of the valve body 31 (sealability). Thereby, manufacture can be facilitated.

弁体収納凹部３０に対して弁体３１が収納され、それらの下面同士が面一とされた状態が弁体３１の最上昇位置となり、弁体３１はこの状態より下方域で上下動することになる。弁体３１が下降する下限は、吊り軸３２の抜け止め部３４が上蓋３に当接する時点として制限されるが、図５に拡大して示すように、上蓋３の上面には吊り軸３２の抜け止め部３４を収納可能な凹部３６が設けられている。   The state in which the valve body 31 is stored in the valve body storage recess 30 and the lower surfaces thereof are flush with each other is the highest position of the valve body 31, and the valve body 31 moves up and down in this region. become. The lower limit of the lowering of the valve body 31 is limited as the point in time when the retaining portion 34 of the suspension shaft 32 comes into contact with the upper lid 3, but as shown in an enlarged view in FIG. A recess 36 is provided in which the retaining portion 34 can be accommodated.

更に、上記のように弁体３が上下動するとき、吊り軸３２も軸孔３３内を上下動することになるが、吊り軸３２にはこの上下動時に軸孔３３内を上下動する範囲内となる部分にＯリング３７が嵌着されている。これにより、吊り軸３２の外周面と軸孔３３の内周面との周間を伝って空気漏れが起こるのを防止してある。
図６に拡大して示すように、弁体３１が弁体収納凹部３０から所定量だけ下降すれば、この弁体３１の外周面と弁体収納凹部３０の開口周部との間には微小な間隙Ｇが形成されることになる。従って、この間隙Ｇを介して、成形室１６内と弁体収納凹部３０内とが連通状態になる。 Furthermore, when the valve body 3 moves up and down as described above, the suspension shaft 32 also moves up and down in the shaft hole 33. The suspension shaft 32 moves up and down in the shaft hole 33 during this vertical movement. An O-ring 37 is fitted to the inner part. This prevents air leakage from occurring between the outer peripheral surface of the suspension shaft 32 and the inner peripheral surface of the shaft hole 33.
As shown in an enlarged view in FIG. 6, if the valve body 31 is lowered from the valve body housing recess 30 by a predetermined amount, there is a minute gap between the outer peripheral surface of the valve body 31 and the opening periphery of the valve body housing recess 30. A gap G is formed. Accordingly, the inside of the molding chamber 16 and the inside of the valve body housing recess 30 are in communication with each other through the gap G.

そして、上蓋３には、この弁体収納凹部３０の内方で一端部を開口させ、他端部を外気に通じさせるようにして通気孔４０が設けられている。図例ではこの通気孔４０が上蓋３の内部で鉤折れして、上位段部３ａの外周面へ抜けるように形成されたものを示してある。図３及び図４に示すように、この通気孔４０は電磁弁４１などを介して空気圧縮機４２と接続配管されている。従って、弁体３１が弁体収納凹部３０から下降することによって間隙Ｇが生じれば、この間隙Ｇから弁体収納凹部３０内及び通気孔４０を介して外気の流通路が形成されることになり、結果、通気孔４０に接続された空気圧縮機４２からの空気（外気）が成形室１６内に流れ出ることになる。   The upper lid 3 is provided with a vent hole 40 so that one end is opened inside the valve body housing recess 30 and the other end is communicated with the outside air. In the illustrated example, the vent 40 is formed so as to be folded inside the upper lid 3 so as to come out to the outer peripheral surface of the upper step portion 3a. As shown in FIGS. 3 and 4, the vent hole 40 is connected to an air compressor 42 via an electromagnetic valve 41 or the like. Therefore, if a gap G is generated by the valve body 31 descending from the valve body housing recess 30, an outside air flow passage is formed from the gap G through the valve body housing recess 30 and the vent hole 40. As a result, air (outside air) from the air compressor 42 connected to the vent hole 40 flows into the molding chamber 16.

なお、図７に示したように、弁体３１の上面には吊り軸３２の連結位置を避けるようにして外周部へ抜ける溝４３が設けられており、弁体３１が弁体収納凹部３０に収納されている状態でも溝４３内（即ち、弁体３１の上面と弁体収納凹部３０の下面との間）に空気が溜まっていることになる。すなわち、弁体３１が弁体収納凹部３０から下降しはじめて間隙Ｇが生じ始めるその瞬間に、溝４３側に溜まった空気が成形室１６内に流れ出ることになり、空気圧縮機４２の応答性などに影響されるようなタイムラグはない。図例において溝４３は十文字状としてあるが、溝４３の本数や配置などは何ら限定されるものではない。   As shown in FIG. 7, a groove 43 is provided on the upper surface of the valve body 31 so as to avoid the connecting position of the suspension shaft 32, and the valve body 31 is formed in the valve body housing recess 30. Even in the housed state, air remains in the groove 43 (that is, between the upper surface of the valve body 31 and the lower surface of the valve body housing recess 30). That is, the air accumulated on the groove 43 side flows out into the molding chamber 16 at the moment when the valve body 31 starts to descend from the valve body housing recess 30 and the gap G starts to be generated, and the responsiveness of the air compressor 42, etc. There is no time lag affected by In the illustrated example, the grooves 43 are cross-shaped, but the number and arrangement of the grooves 43 are not limited at all.

このような構成の本発明に係る乾式ＣＩＰ装置１では、乾式ＣＩＰ処理を終わった段階で昇降台２２の下降によって下蓋４の下パンチ２１を下降させ、成形室１６内の被処理体１５を下方へ取り出すに際し、それまで上蓋３の弁体収納凹部３０内に収納されていた弁体３１が所定量だけ下降するようになる。
このときの弁体３１の下降は、成形室１６内で被処理体１５が下降することに伴う成形室１６内の負圧化、弁体３１の自荷重、空気圧縮機４２からの空気の供給圧などにより迅速に行われる。 In the dry CIP apparatus 1 according to the present invention having such a configuration, the lower punch 21 of the lower lid 4 is lowered by the lowering of the lifting platform 22 when the dry CIP process is finished, and the workpiece 15 in the molding chamber 16 is moved. When taking out downward, the valve body 31 stored in the valve body storage recess 30 of the upper lid 3 is lowered by a predetermined amount.
The lowering of the valve body 31 at this time is caused by the negative pressure in the molding chamber 16 accompanying the lowering of the workpiece 15 in the molding chamber 16, the self-load of the valve body 31, and the supply of air from the air compressor 42. It is done quickly by pressure.

そして、この弁体３１の下降に伴い、弁体３１の外周面と弁体収納凹部３０の開口周部との間に間隙Ｇが生じ、この間隙Ｇが弁体収納凹部３０内、及び通気孔４０と連通することになり、成形室１６内に空気圧縮機４２からの空気が入り込むため、成形室１６からの被処理体１５の下部取り出しが容易且つ迅速に行われることになる。
ところで、本発明は、上記した実施形態に限定されるものではなく、実施の形態に応じて適宜変更可能である。 As the valve body 31 is lowered, a gap G is generated between the outer peripheral surface of the valve body 31 and the opening peripheral portion of the valve body housing recess 30, and this gap G is formed in the valve body housing recess 30 and the vent holes. Since the air from the air compressor 42 enters the molding chamber 16, the lower portion of the object 15 to be processed can be easily and quickly removed from the molding chamber 16.
By the way, the present invention is not limited to the above-described embodiment, and can be appropriately changed according to the embodiment.

例えば、通気路４０に対し、電磁弁４１や空気圧縮機４２を接続配管することは限定されない。   For example, connecting the solenoid valve 41 and the air compressor 42 to the ventilation path 40 is not limited.

本発明に係る乾式ＣＩＰ装置の一実施形態を示した側断面図である。It is the sectional side view which showed one Embodiment of the dry-type CIP apparatus which concerns on this invention. 図１の状態から被処理体を成形室の下部へ取り出す状況を示した側断面図である。It is the sectional side view which showed the condition which takes out a to-be-processed object from the state of FIG. 1 to the lower part of a molding chamber. 図１中の一部（上蓋の周辺）を拡大して示した側断面図である。It is the sectional side view which expanded and showed a part (periphery of an upper cover) in FIG. 図３の状態から被処理体を下方へ取り出し初めて弁体が開いた状況を示した側断面図である。It is the sectional side view which showed the condition where the to-be-processed object was taken out from the state of FIG. 3, and the valve body opened for the first time. 吊り軸の抜け止め部を拡大して示した側面図である。It is the side view which expanded and showed the retaining part of the hanging shaft. 図４中の一部（弁体の周辺）を拡大して示した側断面図である。It is the sectional side view which expanded and showed a part (periphery of a valve body) in FIG. 弁体の平面図である。It is a top view of a valve body.

１ 乾式冷間等方圧加圧装置
２ 成形容器
３ 上蓋
４ 下蓋
６ 成形ゴム型
１５ 被処理体
１６ 成形室
３０ 弁体収納凹部
３１ 弁体
３２ 吊り軸
３３ 軸孔
３７ Ｏリング
４０ 通気孔
Ｇ 間隙 DESCRIPTION OF SYMBOLS 1 Dry type cold isostatic pressurization apparatus 2 Molding container 3 Upper lid 4 Lower lid 6 Molding rubber type 15 Processed object 16 Molding chamber 30 Valve body accommodation recessed part 31 Valve body 32 Suspension shaft 33 Shaft hole 37 O-ring 40 Vent hole G gap

Claims (3)

縦型の筒形に形成された成形容器（２）内に同じく筒形に形成された成形ゴム型（６）が内装され、成形容器（２）の上部開口に上蓋（３）が設けられると共に成形容器（２）の下部開口に下蓋（４）が設けられることで成形ゴム型（６）の内側にその上下両端が閉塞された被処理体（１５）の成形室（１６）が形成可能とされる乾式冷間等方圧加圧装置において、
上蓋（３）にはその下面に下向きに開口し且つ開口内上面を備えた弁体収納凹部（３０）が設けられていると共に、この弁体収納凹部（３０）内で外気に通ずる通気孔（４０）が設けられており、この弁体収納凹部（３０）には上蓋（３）の下面と面一状態で収納可能となる弁体（３１）が設けられ、
この上蓋（３）の弁体収納凹部（３０）と弁体（３１）とが互いに下向きに末広がりのテーパ嵌合をする形状に形成されてなり、
この弁体（３１）が弁体収納凹部（３０）から所定量だけ下降することで初めてこの弁体（３１）の外周面と弁体収納凹部（３０）の開口周部との間隙（Ｇ）及び弁体収納凹部（３０）内及び通気孔（４０）を介して成形室（１６）に対する外気の流通路が形成可能になっていることを特徴とする乾式冷間等方圧加圧装置。 A molded rubber mold (6) also formed in a cylindrical shape is housed in a molded container (2) formed in a vertical cylindrical shape, and an upper lid (3) is provided in the upper opening of the molded container (2). By forming the lower lid (4) in the lower opening of the molding container (2), the molding chamber (16) of the workpiece (15) whose upper and lower ends are closed can be formed inside the molding rubber mold (6). In the dry cold isostatic pressurizing device,
The upper lid (3) is provided with a valve body housing recess (30) that opens downward on its lower surface and has an inner upper surface of the opening, and a vent hole that communicates with the outside air in the valve body housing recess (30) ( 40), and the valve body storage recess (30) is provided with a valve body (31) that can be stored flush with the lower surface of the upper lid (3).
The valve body housing recess (30) and the valve body (31) of the upper lid (3) are formed in a shape that forms a taper fit that spreads downward toward the bottom,
The gap (G) between the outer peripheral surface of the valve body (31) and the opening peripheral portion of the valve body housing recess (30) is not until the valve body (31) is lowered by a predetermined amount from the valve body housing recess (30). And a dry cold isostatic pressurizing device, characterized in that a flow path of outside air to the molding chamber (16) can be formed in the valve body housing recess (30) and through the vent hole (40). 前記上蓋（３）の弁体収納凹部（３０）と弁体（３１）とに形成される末広がりのテーパ嵌合用形状は、弁体収納凹部（３０）に設けられるテーパ角よりも弁体（３１）に設けられるテーパ角の方が緩い角度に形成されていることを特徴とする請求項１記載の乾式冷間等方圧加圧装置。 The shape of the divergent taper fitting formed in the valve body housing recess (30) and the valve body (31) of the upper lid (3) is larger than the taper angle provided in the valve body housing recess (30). The dry cold isostatic pressure pressurizing device according to claim 1, wherein the taper angle provided in the step ( 1 ) is formed at a gentler angle. 前記上蓋（３）には弁体収納凹部（３０）の内部で当該上蓋（３）を上下に貫通する軸孔（３３）が設けられ、この軸孔（３３）には吊り軸（３２）が上下動自在に設けられてこの吊り軸（３２）の下端部に弁体（３１）が連結されており、軸孔（３３）の内周面と吊り軸（３２）の外周面との周間には、弁体（３１）の上下動に伴って吊り軸（３２）が軸孔（３３）内を上下動する範囲内においてＯリング（３７）が設けられていることを特徴とする請求項１又は２に記載の乾式冷間等方圧加圧装置。 The upper lid (3) is provided with a shaft hole (33) vertically passing through the upper lid (3) inside the valve body housing recess (30), and a suspension shaft (32) is provided in the shaft hole (33). The valve body (31) is connected to the lower end of the suspension shaft (32) so as to be movable up and down, and between the inner peripheral surface of the shaft hole (33) and the outer peripheral surface of the suspension shaft (32). An O-ring (37) is provided in a range in which the suspension shaft (32) moves up and down in the shaft hole (33) as the valve body (31) moves up and down. The dry-type cold isostatic pressing apparatus according to 1 or 2 .
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