JPH09122994A - Dry process isostatic pressure molding device and dry process isostatic pressure molding method - Google Patents
Dry process isostatic pressure molding device and dry process isostatic pressure molding methodInfo
- Publication number
- JPH09122994A JPH09122994A JP28361095A JP28361095A JPH09122994A JP H09122994 A JPH09122994 A JP H09122994A JP 28361095 A JP28361095 A JP 28361095A JP 28361095 A JP28361095 A JP 28361095A JP H09122994 A JPH09122994 A JP H09122994A
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- Prior art keywords
- molding
- pressure
- powder
- port
- top punch
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、例えばセラミッ
ク粉末、金属粉末等を成形するための乾式静水圧加圧成
形装置及び乾式静水圧加圧成形方法に関する。TECHNICAL FIELD The present invention relates to a dry hydrostatic pressure molding apparatus and a dry hydrostatic pressure molding method for molding, for example, ceramic powder, metal powder, or the like.
【０００２】[0002]
【従来の技術】 一般に、乾式の静水圧加圧成形（以下
ＣＩＰ成形という。）は、粉末充填、加圧、減圧、成形
体取出しの各工程から成り、セラミック粉末、金属粉末
等の成形に好適に用いられる。2. Description of the Related Art Generally, dry isostatic pressing (hereinafter referred to as CIP molding) comprises powder filling, pressurization, depressurization, and molding removal, and is suitable for molding ceramic powder, metal powder, and the like. Used for.
【０００３】 ＣＩＰ成形による成形工程を、有底円筒
体の成形を例に、図８〜図１１を用いて説明する。ま
ず、図８に示すように、セラミック粉末、金属粉末等の
成形用粉末Ａが、給粉ノズル１を介して圧力容器２内の
成形空間８に挿入・充填される。ここで、圧力容器２
は、内部に、円柱状のマンドレル３と円筒状の成形用ゴ
ム型４、及びマンドレル３を下方から支持するボトムパ
ンチ９とから形成される成形空間８を有し、成形用ゴム
型４の周方向の外周側には、成形用ゴム型４を包囲する
圧媒シールゴム５が備えられている。圧力容器２には圧
媒出入口６が設けられている。なお、７はシールゴムホ
ルダーである。A molding process by CIP molding will be described with reference to FIGS. 8 to 11, taking as an example the molding of a bottomed cylindrical body. First, as shown in FIG. 8, molding powder A such as ceramic powder or metal powder is inserted and filled into the molding space 8 in the pressure container 2 via the powder supply nozzle 1. Here, the pressure vessel 2
Has a molding space 8 formed therein from a cylindrical mandrel 3, a cylindrical molding rubber die 4, and a bottom punch 9 that supports the mandrel 3 from below. A pressure medium seal rubber 5 that surrounds the molding rubber die 4 is provided on the outer peripheral side in the direction. A pressure medium inlet / outlet 6 is provided in the pressure vessel 2. Reference numeral 7 denotes a seal rubber holder.
【０００４】 圧力容器２内の成形空間８に挿入・充填
された成形用粉末Ａは、圧力容器２の上部に、トップゴ
ム栓１０を備えたトップパンチ１１を挿入した後、図９
に示すように、高圧ポンプ（図示せず。）から増圧機
（図示せず。）を経て圧媒出入口６から流入する圧力媒
体により加圧することにより、圧媒シールゴム５及び成
形用ゴム型４を介して圧縮成形される。圧縮成形が終了
した後、図１０に示すように、圧力媒体を圧媒出入口６
より流出させて、成形用ゴム型４を復元させ、次いで、
図１１に示すように、トップパンチ１１を上昇させると
ともにボトムパンチ９を下降させることにより、有底円
筒成形体１２を圧力容器２から取り出す。The molding powder A inserted and filled in the molding space 8 in the pressure container 2 is obtained by inserting the top punch 11 having the top rubber stopper 10 into the upper part of the pressure container 2 and then, as shown in FIG.
As shown in FIG. 3, the pressure medium seal rubber 5 and the molding rubber mold 4 are pressurized by the pressure medium flowing from the pressure medium inlet / outlet 6 from the high pressure pump (not shown) via the pressure booster (not shown). Via compression molding. After the compression molding is completed, as shown in FIG.
More flow out to restore the molding rubber mold 4, and then
As shown in FIG. 11, the bottom punch 9 is taken out from the pressure vessel 2 by raising the top punch 11 and lowering the bottom punch 9.
【０００５】[0005]
【発明が解決しようとする課題】 しかしながら、従来
のＣＩＰ成形においては、成形用粉末を充填する際に、
トップパンチを外した上で給粉ノズルを成形用ゴム型内
に導入していたため、成形空間の上部が開放状態とな
り、給粉ノズルの移動、トップパンチの装着等の際に成
形空間内の成形用粉末に不純物が混入するという問題が
あった。このような不純物は１個混入しただけでも、異
常粒成長、気孔の生成の原因となり、成形体の構造強度
を著しく低下させることになる。However, in the conventional CIP molding, when filling the molding powder,
Since the powder feeding nozzle was introduced into the molding rubber mold after removing the top punch, the upper part of the molding space was opened, and when the powder feeding nozzle was moved or the top punch was mounted, molding in the molding space was performed. There is a problem that impurities are mixed in the powder for use. Even if only one such impurity is mixed, it causes abnormal grain growth and generation of pores, and significantly reduces the structural strength of the compact.
【０００６】 又、従来のＣＩＰ成形においては、給粉
ノズルから供給された成形用粉末は、成形空間内を自然
落下することにより、成形用空間内の空気を置換しなが
ら充填されていたため、充填に長い時間がかかるという
問題があった。一方、充填時間の短縮を図るために一度
に大量の充填を行おうとすると、充填密度が不均一とな
って粉末間の架橋現象を引き起こし、成形体に内在欠陥
が生じるという問題があった。Further, in the conventional CIP molding, the molding powder supplied from the powder feeding nozzle was naturally dropped in the molding space to fill the air while displacing the air in the molding space. There was a problem that it took a long time. On the other hand, if a large amount of filling is attempted at one time in order to shorten the filling time, there is a problem that the filling density becomes non-uniform and a cross-linking phenomenon between powders is caused, causing internal defects in the molded body.
【０００７】 さらに、従来のＣＩＰ成形においては、
成形時の加圧により変形した成形用ゴム型を復元する方
法として、圧力媒体の圧力と大気圧との差を利用して圧
力媒体を自然流出させる方法が採られていた。即ち、圧
力媒体の流出により、成形用ゴム型に加わる圧力が成形
用ゴム型の弾性力より小さくなることにより、成形用ゴ
ム型の復元が進行するのである。Further, in the conventional CIP molding,
As a method of restoring a rubber mold for molding which is deformed by pressurization at the time of molding, a method has been adopted in which the pressure medium is naturally discharged by utilizing the difference between the pressure of the pressure medium and the atmospheric pressure. In other words, due to the pressure medium flowing out, the pressure applied to the molding rubber die becomes smaller than the elastic force of the molding rubber die, and the restoration of the molding rubber die proceeds.
【０００８】 しかしながら、自然流出下では、流出の
進行により圧力媒体の圧力と大気圧との差が小さくなる
と、流出速度が小さくなるため、成形用ゴム型が完全に
復元するのには長時間を要し、成形効率の向上を図る上
で支障となっていた。復元に要する時間を短縮する方法
として、弾性力の大きい成形用ゴム型を用いることも考
えられるが、この場合は、成形用ゴム型の成形体からの
脱離が急激に起こるため、応力開放により成形体にクラ
ックが発生するという不都合がある。一方、復元が十分
行われていない時点で、次の成形を開始すべく成形用粉
末の充填を開始すると、成形用ゴム型の容積が復元時に
比べ小さいため、所定量の粉末を充填した場合、成形用
ゴム型内の粉末の上端が上昇してトップパンチの装着に
支障を来たし、粉末の充填量を変更しなければならない
という不都合がある。However, under natural outflow, when the difference between the pressure of the pressure medium and the atmospheric pressure becomes smaller due to the progress of outflow, the outflow rate becomes smaller, and therefore it takes a long time for the molding rubber die to completely restore. In other words, this is an obstacle to improving the molding efficiency. As a method of shortening the time required for restoration, it is possible to use a rubber mold for molding with a large elastic force, but in this case, since the rubber mold for molding is rapidly detached from the molded body, it is necessary to release the stress. There is an inconvenience that cracks occur in the molded body. On the other hand, when the filling of the molding powder to start the next molding is started at a time when the restoration is not sufficiently performed, since the volume of the molding rubber mold is smaller than that at the time of restoration, when a predetermined amount of powder is filled, There is an inconvenience that the upper end of the powder in the molding rubber die rises, hindering the mounting of the top punch, and the powder filling amount has to be changed.
【０００９】[0009]
【課題を解決するための手段】 本発明は、このような
状況に鑑みてなされたものであり、その目的とするとこ
ろは、不純物を混入させること無く、かつ迅速に、成形
用粉末を充填できるとともに、成形終了後の減圧による
成形用ゴム型の復元を短時間で行うことができる乾式静
水圧加圧成形装置及び乾式静水圧加圧成形方法を提供す
ることにある。Means for Solving the Problems The present invention has been made in view of such circumstances, and an object of the present invention is to rapidly fill a molding powder without mixing impurities. Another object of the present invention is to provide a dry hydrostatic pressure molding apparatus and a dry hydrostatic pressure molding method that can restore the molding rubber die by depressurizing after the molding is completed in a short time.
【００１０】 即ち、本発明によれば、成形用ゴム型
と、それを収容する圧力容器と、圧力容器の上部に設け
た孔部内に嵌合的に装着されたトップパンチとを備え、
成形用ゴム型内の成形空間に成形用粉末を充填した後、
成形用ゴム型の外周側から圧力媒体により静水圧加圧を
施すことにより成形を行い、続いて成形用ゴム型の外周
側から圧力媒体を除去することにより成形用ゴム型を復
元して成形体を取り出す乾式静水圧加圧成形装置であっ
て、さらに、成形用粉末を成形空間内に供給する給粉
口、供給された成形用粉末により置換された空気を除去
するとともに成形用ゴム型内に圧縮空気を導入するため
の通気口、及び成形用ゴム型内に圧縮空気を供給する圧
縮空気供給手段を備え、上記給粉口及び通気口は、当該
圧力容器の当該孔部内壁に開口部を有するとともに、当
該開口部より斜め上方に当該圧力容器を貫通し、上記給
粉口の開口部は通気口の開口部より上方に位置し、トッ
プパンチは、当該孔部の内周面と当該トップパンチの外
周面との隙間を閉塞するシール部材を有し、上記シール
部材が給粉口及び通気口の上方に位置するようにトップ
パンチを移動させることにより、上記孔部がトップパン
チによって閉塞された状態で、上記給粉口及び通気口と
成形空間とが連通し、上記シール部材が上記給粉口及び
通気口の下方に位置するようにトップパンチを移動させ
ることにより、上記給粉口及び通気口と成形空間との連
通が遮断され、上記シール部材が当該給粉口の下方かつ
当該通気口の上方に位置するように当該トップパンチを
移動させることにより、当該成形空間が当該通気口と連
通するとともに、当該給粉口と当該成形空間との連通が
遮断される乾式静水圧加圧成形装置が提供される。That is, according to the present invention, a molding rubber die, a pressure container for accommodating the molding rubber mold, and a top punch fitted and fitted in a hole provided in an upper portion of the pressure container are provided,
After filling the molding powder in the molding space in the molding rubber mold,
Molding is performed by applying hydrostatic pressure from the outer peripheral side of the molding rubber mold to the molding rubber mold, and then removing the pressure medium from the outer peripheral side of the molding rubber mold to restore the molding rubber mold and molding. Is a dry hydrostatic pressure molding device that further removes the air, which is replaced by the powder supply port that supplies the molding powder into the molding space and the air that has been replaced by the supplied molding powder. A vent for introducing compressed air, and a compressed air supply means for supplying compressed air into the rubber mold for molding are provided, and the powder inlet and the vent have an opening on the inner wall of the hole of the pressure vessel. While having the same, it penetrates the pressure vessel obliquely above the opening, the opening of the powder feeding port is located above the opening of the vent, and the top punch is the inner peripheral surface of the hole and the top. Closes the gap between the punch and the outer surface A sealing member, and by moving the top punch such that the sealing member is located above the powder feeding port and the ventilation port, the hole is closed by the top punch, and the powder feeding port and The vent hole and the molding space are communicated with each other, and the top punch is moved so that the sealing member is located below the powder feed port and the vent hole, so that the powder feed port and the vent hole are communicated with the molding space. By moving the top punch so that the sealing member is located below the powder supply port and above the air supply port, the molding space communicates with the air supply port and the powder supply port. Provided is a dry hydrostatic pressure molding apparatus in which communication with the molding space is cut off.
【００１１】 本発明の乾式静水圧加圧成形装置におい
て、前記トップパンチが、前記シール部材の上方近傍に
マグネットを備えることが好ましい。又、本発明の乾式
静水圧加圧成形装置は、成形空間内の空気を前記通気口
より吸引排除する吸引手段を有することが好ましい。In the dry hydrostatic pressure molding apparatus of the present invention, it is preferable that the top punch includes a magnet near the upper portion of the seal member. Further, the dry hydrostatic pressure molding apparatus of the present invention preferably has a suction means for sucking and removing air in the molding space from the ventilation port.
【００１２】 又、本発明の乾式静水圧加圧成形装置に
おいて、上記圧力容器の上部に設けた孔部の内周の中心
点に対する、前記給粉口と通気口の開口部間の角距離は
１２０〜２４０°であり、シール部材が給粉口及び通気
口の上方に位置するようにトップパンチを移動させた場
合に、前記トップパンチの下端部が、上記給粉口と通気
口の開口部間の空間を遮断することが好ましい。In the dry hydrostatic pressure molding apparatus of the present invention, the angular distance between the powder feeding port and the vent port opening with respect to the center point of the inner circumference of the hole provided in the upper portion of the pressure container is It is 120 to 240 °, and when the top punch is moved so that the sealing member is located above the powder feeding port and the ventilation port, the lower end portion of the top punch has an opening portion of the powder feeding port and the ventilation port. It is preferable to block the space between them.
【００１３】 さらに、本発明の乾式静水圧加圧成形装
置は、圧力媒体を前記成形用ゴム型の外周側から除去す
る圧力媒体吸引手段を有することが好ましい。Further, it is preferable that the dry hydrostatic pressure molding apparatus of the present invention has a pressure medium suction means for removing the pressure medium from the outer peripheral side of the molding rubber die.
【００１４】 又、本発明によれば、上記の乾式静水圧
加圧成形装置を用いて成形を行う乾式静水圧加圧成形方
法が提供される。圧力媒体の吸引除去は、圧力媒体によ
って成形用ゴム型にかかる圧力が５ｋｇｆ／ｃｍ2以
上、４０ｋｇｆ／ｃｍ2以下の範囲にある時に行われる
ことが好ましい。又、圧縮空気の成形用ゴム型内への供
給は、圧力媒体によって成形用ゴム型にかかる圧力が５
ｋｇｆ／ｃｍ2以上、４０ｋｇｆ／ｃｍ2以下の範囲にあ
る時に行われることが好ましい。Further, according to the present invention, there is provided a dry hydrostatic pressure molding method in which molding is performed using the dry hydrostatic pressure molding apparatus described above. Aspirate the pressure medium, the pressure applied to the molding rubber mold by a pressure medium 5 kgf / cm 2 or more, is preferably performed when the range of 40 kgf / cm 2 or less. Further, the compressed air is supplied to the molding rubber die by applying a pressure medium to the molding rubber die at a pressure of 5
kgf / cm 2 or more, is preferably performed when the range of 40 kgf / cm 2 or less.
【００１５】[0015]
【発明の実施の形態】 本発明のＣＩＰ成形装置は、成
形用粉末を成形空間内に供給する給粉口、及び供給され
た成形用粉末により置換された空気を除去するための通
気口を備える。これら給粉口及び通気口は、圧力容器に
トップパンチを嵌合的に装着すべく設けた孔部の内壁に
開口部を有し、その開口部より斜め上方に圧力容器を貫
通して成る。BEST MODE FOR CARRYING OUT THE INVENTION The CIP molding apparatus of the present invention is provided with a powder supply port for supplying the molding powder into the molding space, and a ventilation port for removing the air displaced by the supplied molding powder. . Each of the powder feeding port and the ventilation port has an opening in the inner wall of a hole provided for fittingly fitting the top punch to the pressure container, and penetrates the pressure container obliquely above the opening.
【００１６】 従って、トップパンチを上方に移動させ
ることにより給粉口及び通気口と成形空間とが連通する
ため、トップパンチを取り外さなくても成形用粉末の充
填ができ、従って、成形空間内に、給粉ノズルの移動等
に起因する不純物が混入するのを防ぐことができる。
又、トップパンチを下方に移動させることにより、トッ
プパンチ自体により、上記給粉口及び通気口と成形空間
との連通が遮断され、加圧が可能な状態となる。Therefore, by moving the top punch upward, the powder feeding port and the vent hole communicate with the molding space, so that the molding powder can be filled without removing the top punch. It is possible to prevent impurities from being mixed due to movement of the powder feeding nozzle and the like.
Further, by moving the top punch downward, the top punch itself blocks the communication between the powder supply port and the ventilation port and the molding space, and the pressurization is enabled.
【００１７】 又、本発明のＣＩＰ成形装置は、トップ
パンチの外周面にシール部材を有するため、圧力容器に
設けた孔部の内周面とトップパンチの外周面との隙間を
閉塞することができ、粉末充填の際に、トップパンチの
上下等により発生する不純物が成形空間内に侵入するの
を防ぐことができる。シール部材は、給粉口及び通気口
と成形空間とを連通させた状態において、これらの開口
部より上方に位置するように設けることが必要である。
又、シール部材は、全周に渡って設けることが好まし
い。なお、シール部材としては、硬質樹脂製のシールリ
ング等が好適に用いられる。Further, since the CIP molding apparatus of the present invention has the sealing member on the outer peripheral surface of the top punch, it is possible to close the gap between the inner peripheral surface of the hole provided in the pressure container and the outer peripheral surface of the top punch. Therefore, it is possible to prevent impurities generated by the top and bottom of the top punch from entering the molding space during powder filling. It is necessary that the seal member is provided so as to be located above these openings when the powder supply port and the ventilation port are in communication with the molding space.
Further, it is preferable that the seal member is provided over the entire circumference. As the seal member, a hard resin seal ring or the like is preferably used.
【００１８】 又、上記のＣＩＰ成形装置において、上
記シール部材の上方近傍にマグネットを設ければ、トッ
プパンチの作動によって発生する着磁性の物質を効果的
に除去でき鉄系コンタミ欠陥の発生を防ぐことができ
る。マグネットも全周に渡って設けることが好ましい。Further, in the above CIP molding apparatus, if a magnet is provided in the vicinity of the upper part of the seal member, the magnetizing substance generated by the operation of the top punch can be effectively removed, and the occurrence of iron-based contamination defects can be prevented. be able to. It is preferable that the magnet is also provided over the entire circumference.
【００１９】 又、本発明のＣＩＰ成形装置は、さらに
前述の通気口を介して成形用ゴム型内に圧縮空気を供給
する圧縮空気供給手段を備えるとともに、給粉口の開口
部は通気口の開口部より上方に位置する。Further, the CIP molding apparatus of the present invention further comprises a compressed air supply means for supplying compressed air into the molding rubber mold through the above-mentioned ventilation hole, and the opening of the powder feeding port is the ventilation hole. It is located above the opening.
【００２０】 圧媒を流出させることによる成形用ゴム
型の復元に際して、圧縮空気を成形用ゴム型内に導入す
ることにより、成形用ゴム型の復元と圧媒の流出を促進
することができ、成形用ゴム型の復元に要する時間を短
縮することができる。又、従来の圧媒の自然流出による
復元では、成形用ゴム型の復元が完了したか否かの判断
が困難であるが、本発明においては、成形用ゴム型が復
元を通り越して若干膨らむ程度まで圧縮空気を導入して
から圧縮空気を除去すれば、このような判断が不要にな
るという利点もある。圧縮空気供給手段としては、例え
ば、コンプレッサー等が用いられる。圧縮空気の圧力
は、成形用ゴム型の弾性強度（弾性特性）にもよるが４
ｋｇｆ／ｃｍ2以上であることが好ましい。給粉口の開
口部を通気口の開口部より上方に設けたのは、シール部
材が給粉口と通気口の間に位置するようにトップパンチ
を移動させることにより、成形空間は通気口を介して圧
縮空気供給手段と連通する以外は密閉された状態とな
り、圧縮空気による圧力を効果的に働かせることができ
るからである。When restoring the molding rubber die by flowing out the pressure medium, by introducing compressed air into the molding rubber die, restoration of the molding rubber die and outflow of the pressure medium can be promoted. The time required to restore the molding rubber mold can be shortened. Further, it is difficult to judge whether or not the restoration of the molding rubber die is completed by the conventional restoration by spontaneous outflow of the pressure medium, but in the present invention, the extent that the molding rubber die swells slightly beyond the restoration. If compressed air is introduced after the compressed air is introduced up to this point, there is also an advantage that such a judgment becomes unnecessary. As the compressed air supply means, for example, a compressor or the like is used. The pressure of the compressed air depends on the elastic strength (elastic characteristics) of the molding rubber mold, but
It is preferably at least kgf / cm 2 . The opening of the powder feeding port was provided above the opening of the ventilation port because the top punch is moved so that the sealing member is located between the powder feeding port and the ventilation port, and This is because, except for communicating with the compressed air supply means via a closed state, the pressure of the compressed air can be effectively exerted.
【００２１】 なお、加圧の際には、シール部材が給粉
口及び通気口の下方に位置するようにトップパンチを移
動させることにより、給粉口及び通気口と成形空間との
連通が遮断される。During pressurization, the top punch is moved so that the sealing member is located below the powder feeding port and the ventilation port, so that the communication between the powder feeding port and the ventilation port and the molding space is blocked. To be done.
【００２２】 さらに、上記のＣＩＰ成形装置に圧力媒
体吸引手段を設ければ、成形用ゴム型を復元する際に、
圧力媒体を成形用ゴム型の外周側から強制的に除去する
ことができ、成形用ゴム型の復元に要する時間をより短
縮することができる。圧力媒体は、圧媒出口又は圧媒入
口を介して吸引除去されるが、圧力媒体吸引手段として
は、例えば、真空ポンプ、イジェクター等が用いられ
る。Further, if the above-mentioned CIP molding apparatus is provided with the pressure medium suction means, when the molding rubber mold is restored,
The pressure medium can be forcibly removed from the outer peripheral side of the molding rubber die, and the time required to restore the molding rubber die can be further shortened. The pressure medium is sucked and removed through the pressure medium outlet or the pressure medium inlet, and as the pressure medium suction means, for example, a vacuum pump, an ejector or the like is used.
【００２３】 成形用ゴム型内への圧縮空気の供給、成
形用ゴム型の外周側からの圧力媒体の吸引除去は、圧力
媒体の自然流出により成形用ゴム型にかかる圧力が低下
し、５ｋｇｆ／ｃｍ2以上、４０ｋｇｆ／ｃｍ2以下の範
囲にある時に行うことが好ましい。さもなければ、成形
用ゴム型の成形体からの脱離が急激に起こり、応力開放
により成形体にクラックが発生する恐れがあるからであ
る。The supply of compressed air into the molding rubber die and the suction removal of the pressure medium from the outer peripheral side of the molding rubber die reduce the pressure applied to the molding rubber die due to the natural outflow of the pressure medium, and the pressure of 5 kgf / cm 2 or more, it is preferable to carry out when in the range of 40 kgf / cm 2 or less. Otherwise, the molding rubber mold may be rapidly detached from the molded body, and cracks may occur in the molded body due to release of stress.
【００２４】 さらに、上記のＣＩＰ成形装置に、成形
空間内の空気を前述の通気口を通じて吸引排除する吸引
手段を設ければ、成形用粉末の充填速度を上げることが
でき好ましい。即ち、成形空間内の空気を吸引除去する
ことで、成形空間内が陰圧になるとともに、成形用粉末
の落下の際の空気抵抗が弱まるため、充填速度を上げる
ことができるのである。吸引手段としては、例えば、真
空ポンプ等が用いられる。上記の吸引手段を設けた場合
は、前記のシール部材は、吸引効果を増大させる役割も
果たす。Furthermore, it is preferable to provide the above-mentioned CIP molding apparatus with suction means for sucking and removing air in the molding space through the above-mentioned ventilation port, because the filling speed of the molding powder can be increased. That is, by sucking and removing the air in the molding space, the inside of the molding space becomes negative pressure and the air resistance when the molding powder falls is weakened, so that the filling speed can be increased. As the suction means, for example, a vacuum pump or the like is used. When the above-mentioned suction means is provided, the sealing member also plays a role of increasing the suction effect.
【００２５】 この場合、給粉口及び通気口の開口部間
の角距離は、圧力容器の孔部の内周の中心点に対して１
２０〜２４０°、より望ましくは１６０〜２００°であ
ることが好ましい。開口部をこのように配置することに
より、成形用粉末の充填の際に、トップパンチの下端部
を、給粉口と通気口の開口部間の空間を遮断するように
配置することができるため、給粉口から導入された成形
用粉末が通気口より吸引されるという事態を回避するこ
とができる。In this case, the angular distance between the openings of the powder inlet and the vent is 1 with respect to the center point of the inner circumference of the hole of the pressure vessel.
It is preferably 20 to 240 °, more preferably 160 to 200 °. By arranging the openings in this way, it is possible to arrange the lower end of the top punch so as to block the space between the openings of the powder feeding port and the ventilation port when filling the molding powder. It is possible to avoid a situation in which the molding powder introduced from the powder feeding port is sucked from the ventilation port.
【００２６】 図１に上記のＣＩＰ成形装置の一例を示
す。図１のＣＩＰ成形装置１４において、圧力容器２の
内部には、円筒状の成形用ゴム型４が配設され、成形用
ゴム型４の上部及び下部には、それぞれトップパンチ１
１及びボトムパンチ９が配設されている。成形空間８
は、成形用ゴム型４の内周面、トップパンチ１１の下
面、及びボトムパンチ９の上面により形成される。成形
用ゴム型４の外周面には、成形用ゴム型４を包囲するよ
うに圧媒シールゴム５が配設されている。FIG. 1 shows an example of the above CIP molding apparatus. In the CIP molding apparatus 14 of FIG. 1, a cylindrical molding rubber die 4 is disposed inside the pressure vessel 2, and the top punch 1 is provided on the upper and lower portions of the molding rubber die 4, respectively.
1 and a bottom punch 9 are provided. Molding space 8
Is formed by the inner peripheral surface of the molding rubber die 4, the lower surface of the top punch 11, and the upper surface of the bottom punch 9. A pressure medium sealing rubber 5 is arranged on the outer peripheral surface of the molding rubber die 4 so as to surround the molding rubber die 4.
【００２７】 圧力容器２は本体２ａと蓋部２ｂから成
り、トップパンチ１１は、蓋部２ｂに設けた孔部１３内
に嵌合的に取り付けられている。蓋部２ｂは給粉口１５
及び通気口１６を有し、これらは、蓋部２ｂの上端面２
４及び孔部内壁に開口部１７、１８、２５、２６を有す
る。又、トップパンチ１１の外周面には、図２に示すよ
うに、シールリング１９及びマグネット２０が全周に渡
って設けられている。The pressure vessel 2 is composed of a main body 2a and a lid portion 2b, and the top punch 11 is fitted and attached in a hole portion 13 provided in the lid portion 2b. The lid 2b has a powder feeding port 15
And a ventilation hole 16, which are the upper end surface 2 of the lid 2b.
4 and the inner wall of the hole has openings 17, 18, 25, and 26. As shown in FIG. 2, a seal ring 19 and a magnet 20 are provided on the outer peripheral surface of the top punch 11 over the entire circumference.
【００２８】 通気口１６は真空ポンプ等の吸引手段
（図示せず。）及びコンプレッサー等の圧縮空気供給手
段（図示せず。）に高圧弁等を介して接続されている。The vent 16 is connected to a suction means (not shown) such as a vacuum pump and a compressed air supply means (not shown) such as a compressor via a high pressure valve or the like.
【００２９】[0029]
【実施例】 以下、本発明を図示の実施例を用いてさら
に詳しく説明するが、本発明はこれらの実施例に限られ
るものではない。Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments, but the present invention is not limited to these embodiments.
【００３０】 上記のＣＩＰ成形装置を用いて、外径４
７．０ｍｍ、内径４２．７ｍｍ、高さ４３５ｍｍの有底
円筒成形体を作製した。この成形体は、ナトリウム−硫
黄電池用のβ−アルミナ管として用いられるものであ
る。Using the above CIP molding device, an outer diameter of 4
A bottomed cylindrical molded body having a size of 7.0 mm, an inner diameter of 42.7 mm and a height of 435 mm was produced. This molded body is used as a β-alumina tube for a sodium-sulfur battery.
【００３１】 図３に成形に用いたＣＩＰ成形装置の構
成を示す。ＣＩＰ成形装置１４において、圧力容器２の
内部には、円筒状の成形用ゴム型４及び円柱状のマンド
レル３が配設され、成形用ゴム型４の上部及び下部に
は、それぞれトップパンチ１１及びボトムパンチ９が配
設されている。トップパンチ１１にはトップゴム栓１０
が取り付けられている。成形空間８は、成形用ゴム型４
の内周面、マンドレル３の周面、トップゴム栓１０の下
面、及びボトムパンチ９の上面により形成される。成形
用ゴム型４の外周面には、成形用ゴム型４を包囲するよ
うに圧媒シールゴム５が配設されている。なお、成形用
ゴム型４及びトップゴム栓１０はウレタンゴムから成
り、その硬度はＨｓ（Ａ）で７０°である。FIG. 3 shows the configuration of the CIP molding apparatus used for molding. In the CIP molding device 14, a cylindrical molding rubber die 4 and a cylindrical mandrel 3 are arranged inside the pressure vessel 2, and the top punch 11 and the top punch 11 are respectively provided above and below the molding rubber die 4. A bottom punch 9 is provided. Top punch 11 has top rubber stopper 10
Is attached. The molding space 8 is a rubber mold 4 for molding.
Of the inner surface of the mandrel 3, the lower surface of the top rubber plug 10 and the upper surface of the bottom punch 9. A pressure medium sealing rubber 5 is arranged on the outer peripheral surface of the molding rubber die 4 so as to surround the molding rubber die 4. The molding rubber mold 4 and the top rubber plug 10 are made of urethane rubber and have a hardness of 70 ° in Hs (A).
【００３２】 圧力容器２は本体２ａと蓋部２ｂとから
成り、トップパンチ１１は、蓋部２ｂに設けた孔部１３
内に嵌合的に取り付けられている。蓋部２ｂは給粉口１
５及び通気口１６を有し、これらは、蓋部２ｂの上端面
２４及び孔部１３内壁に開口部１７、１８、２５、２６
を有する。給粉口１５及び通気口１６の開口部のうち、
孔部１３内壁に位置するもの１７、１８は、孔部１３の
内周上の互いに対向する位置に設けられている。又、給
粉口１５の開口部１７は、通気口１６の開口部１８より
３０ｍｍ上方に設けられている。トップパンチ１１の外
周面には、円周方向にシールリング１９及びマグネット
２０が設けられている。通気口１６には、第１三方弁２
７が接続され、第１三方弁２７は真空ポンプ２８及び第
２三方弁４１に接続されている。第２三方弁４１は、エ
アードライヤー４２を介してコンプレッサー４３に接続
されている。The pressure vessel 2 is composed of a main body 2 a and a lid portion 2 b, and the top punch 11 has a hole portion 13 provided in the lid portion 2 b.
It is fittedly fitted inside. The lid 2b is the powder feeding port 1
5 and a vent 16 which are provided in the upper end surface 24 of the lid 2b and the inner wall of the hole 13 with openings 17, 18, 25, 26.
Having. Of the openings of the powder supply port 15 and the ventilation port 16,
The objects 17 and 18 located on the inner wall of the hole 13 are provided at positions on the inner circumference of the hole 13 that face each other. The opening 17 of the powder supply port 15 is provided 30 mm above the opening 18 of the ventilation port 16. A seal ring 19 and a magnet 20 are circumferentially provided on the outer peripheral surface of the top punch 11. The vent 16 has a first three-way valve 2
7 is connected, and the first three-way valve 27 is connected to the vacuum pump 28 and the second three-way valve 41. The second three-way valve 41 is connected to the compressor 43 via an air dryer 42.
【００３３】 圧媒タンク３２は、高圧ポンプ３３、増
圧機３４、及び第１高圧弁３５を介して圧媒入口３１に
接続されるとともに、第４高圧弁３６を介して圧媒出口
３０に接続され、閉ループを形成している。又、第４高
圧弁３６を介するラインと並列に、減圧制御装置３７及
び第３高圧弁３８を有するライン、並びにイジェクター
３９及び第２高圧弁４０を有するラインが設けられてい
る。The pressure medium tank 32 is connected to the pressure medium inlet 31 via the high pressure pump 33, the pressure booster 34, and the first high pressure valve 35, and is connected to the pressure medium outlet 30 via the fourth high pressure valve 36. And form a closed loop. Further, a line having the pressure reducing control device 37 and the third high pressure valve 38, and a line having the ejector 39 and the second high pressure valve 40 are provided in parallel with the line passing through the fourth high pressure valve 36.
【００３４】 成形は以下のように行った。まず、成形
空間８への成形用粉末の充填を行った。イジェクター３
９による圧力媒体の吸引を開始した後、図４に示すよう
に、シールリング１９が給粉口１５及び通気口１６より
上方に位置するようにトップパンチ１１を移動させた。
第１三方弁２７を真空ポンプ２８側にした上で、真空ポ
ンプ２８により成形用ゴム型４内の空気を吸引しなが
ら、マンドレル３を装着したボトムパンチ９を圧力容器
２の下部に取り付けた。空気吸引を継続しつつ、粉末計
量供給装置２９で予め計量した４２０ｇの粉末Ａを給粉
口１５を介して成形空間８に充填した。粉末充填終了
後、三方弁２７、４１を大気開放にするとともに圧力媒
体の吸引を停止した。Molding was performed as follows. First, the molding powder was filled into the molding space 8. Ejector 3
After the suction of the pressure medium by 9 was started, the top punch 11 was moved so that the seal ring 19 was located above the powder feeding port 15 and the ventilation port 16 as shown in FIG.
The first three-way valve 27 was placed on the side of the vacuum pump 28, and the bottom punch 9 having the mandrel 3 attached thereto was attached to the lower portion of the pressure vessel 2 while sucking air in the molding rubber die 4 by the vacuum pump 28. While continuing the air suction, 420 g of the powder A previously measured by the powder metering and feeding device 29 was filled into the molding space 8 through the powder feeding port 15. After the powder filling was completed, the three-way valves 27 and 41 were opened to the atmosphere and the suction of the pressure medium was stopped.
【００３５】 次に加圧を行った。図５に示すように、
トップパンチ１１を下方に移動させて給粉口１５及び通
気口１６を閉じた。圧力容器２をプレスフレーム（図示
せず。）内に収納した後、圧媒出口３０を第２〜第４高
圧弁４０、３８、３６で閉じた状態で、高圧ポンプ３３
及び増圧機３４を用いて圧媒入口３１より圧力媒体を注
入した。常圧から２０００ｋｇｆ／ｃｍ2まで昇圧し、
２０００ｋｇｆ／ｃｍ2で３秒間保持した。なお、プレ
スフレームは、トップパンチ１１及びボトムパンチ９
が、成形圧により圧力容器２から突出するのを防ぐため
に用いられる。Next, pressure was applied. As shown in FIG.
The top punch 11 was moved downward to close the powder feeding port 15 and the ventilation port 16. After accommodating the pressure vessel 2 in a press frame (not shown), the high pressure pump 33 with the pressure medium outlet 30 closed by the second to fourth high pressure valves 40, 38 and 36.
The pressure medium was injected from the pressure medium inlet 31 using the pressure booster 34. Increase the pressure from normal pressure to 2000 kgf / cm 2 ,
It was held at 2000 kgf / cm 2 for 3 seconds. The press frame includes the top punch 11 and the bottom punch 9
Are used to prevent the protrusion from the pressure vessel 2 due to the molding pressure.
【００３６】 次に減圧により成形用ゴム型４の復元を
開始した。まず、圧媒入口３１を第１高圧弁３５で閉じ
るとともに第４高圧弁３６を開放し、圧媒の自然流出に
より、２０００ｋｇｆ／ｃｍ2から１５０ｋｇｆ／ｃｍ2
まで減圧した。次に、第４高圧弁３６を閉じるとともに
第３高圧弁３８を開き、減圧制御装置３７を用いて１５
０ｋｇｆ／ｃｍ2から１５ｋｇｆ／ｃｍ2まで減圧した。
なお、減圧制御装置３７は、減圧速度を制御するために
用いられ、３５０ｋｇｆ／ｃｍ2以下の圧力で作用す
る。次に、第３高圧弁３８を閉じるとともに第２高圧弁
４０を開き、イジェクター３９により圧力媒体の吸引を
開始した。同時に、圧力容器２をプレスフレームから取
り出し、図６に示すように、シールリング１９が給粉口
１５と通気口１６の間に位置するようにトップパンチ１
１を移動させるとともに、三方弁２７、４１をコンプレ
ッサー４３側にし、通気口１６より成形空間８内に圧縮
空気を導入した。Next, decompression was started to restore the molding rubber mold 4. First, the fourth high-pressure valve 36 is opened closes the pressure medium inlet 31 in the first high-pressure valve 35, by natural outflow of pressure medium, 150 kgf from 2000kgf / cm 2 / cm 2
The pressure was reduced to Next, the fourth high pressure valve 36 is closed and the third high pressure valve 38 is opened, and the pressure reducing controller 37 is used to
The pressure was reduced from 0 kgf / cm 2 to 15 kgf / cm 2 .
The decompression control device 37 is used to control the decompression rate, and operates at a pressure of 350 kgf / cm 2 or less. Next, the third high pressure valve 38 was closed and the second high pressure valve 40 was opened, and the ejector 39 started suction of the pressure medium. At the same time, the pressure vessel 2 is taken out of the press frame, and the top punch 1 is placed so that the seal ring 19 is located between the powder feeding port 15 and the ventilation port 16 as shown in FIG.
1 was moved, the three-way valves 27 and 41 were set to the compressor 43 side, and compressed air was introduced into the molding space 8 through the vent 16.
【００３７】 最後に、成形体１２の取り出しを行っ
た。成形体１２の取り出しは、圧縮空気の導入開始５秒
後に、図７に示すように、トップパンチ１１を成形用粉
末充填時の位置に移動させた上で、ボトムパンチ９を下
方に移動させることにより行った。その後、圧縮空気の
導入を停止した。なお、圧力媒体の吸引は、次のサイク
ルの粉末充填後、トップパンチ１１により給粉口１５及
び通気口１６が閉じられるまで継続した。Finally, the molded body 12 was taken out. The molded body 12 is taken out by moving the top punch 11 to the position where the molding powder was filled and then moving the bottom punch 9 downward, as shown in FIG. 7, 5 seconds after the introduction of compressed air. Went by. Then, the introduction of compressed air was stopped. The suction of the pressure medium was continued until the powder feeding port 15 and the ventilation port 16 were closed by the top punch 11 after the powder filling in the next cycle.
【００３８】 従来のＣＩＰ成形装置では、鉄系の不純
物の混入に起因する鉄系コンタミ欠陥が約３．１％の頻
度で発生したが、上記のＣＩＰ成形装置を用いて成形を
行うことにより、発生頻度が０．５％に減少した。又、
上記のＣＩＰ成形装置を用いて成形を行うことにより、
従来に比べ、成形サイクル全体に要する時間を約３０秒
短縮することができた。即ち、従来のＣＩＰ成形装置で
は、トップパンチの動作時間も含めて、粉末の充填に約
３０秒を要したが、上記のＣＩＰ成形装置を用いた場合
は約１５秒で充填が完了し、充填時間を約１５秒短縮で
きた。さらに、従来は成形用ゴム型の復元に長時間を要
したため、成形体取り出し後すぐには次の成形サイクル
に移れず、約１５秒の待機時間を設けていたが、上記の
ＣＩＰ成形装置を用いた場合は待機時間を設ける必要が
無くなり、さらに１５秒の短縮が可能となった。なお、
復元が完了したか否かは、成形に必要な所定重量の成形
用粉末を充填してトップパンチを閉じた際に、成形空間
内の成形用粉末の上端が圧力容器をプレスフレームに収
容することができる範囲にあるか否かで判断した。即
ち、復元が不十分の場合は成形空間の容積が小さくなる
ため、成形用粉末の上端が上昇してトップパンチが十分
に閉じず、プレスフレームに収容することができなくな
る。In the conventional CIP molding apparatus, the iron-based contamination defects caused by the mixing of the iron-based impurities occurred at a frequency of about 3.1%, but by performing the molding using the CIP molding apparatus described above, The frequency of occurrence was reduced to 0.5%. or,
By molding using the above CIP molding device,
It was possible to reduce the time required for the entire molding cycle by about 30 seconds compared to the conventional method. That is, in the conventional CIP molding apparatus, it took about 30 seconds to fill the powder including the operation time of the top punch, but when the above CIP molding apparatus was used, the filling was completed in about 15 seconds. I saved about 15 seconds. Further, in the past, since it took a long time to restore the molding rubber die, it was impossible to move to the next molding cycle immediately after taking out the molded body, and the waiting time of about 15 seconds was provided. When it was used, it was not necessary to provide a waiting time, and it was possible to shorten the time by 15 seconds. In addition,
Whether or not the restoration is completed depends on whether the upper end of the molding powder in the molding space contains the pressure vessel in the press frame when the molding powder of the required weight for molding is filled and the top punch is closed. It was judged by whether it was within the range where That is, when the restoration is insufficient, the volume of the molding space becomes small, and the upper end of the molding powder rises, the top punch does not close sufficiently, and the powder cannot be accommodated in the press frame.
【００３９】[0039]
【発明の効果】 本発明において、ＣＩＰ成形装置は、
圧力容器を貫通して成る給粉口及び通気口を有し、これ
らはトップパンチを嵌合的に装着すべく圧力容器に設け
た孔部の内壁に開口部を有するため、トップパンチを取
り外さなくても成形用粉末の充填ができ、従って、成形
空間内に、給粉ノズルの移動等に起因する不純物が混入
するのを防ぐことができる。又、トップパンチの着脱を
行わなくてもよいため、成形効率が向上するという利点
もある。又、トップパンチに、上記孔部の内周面とトッ
プパンチの外周面との隙間を閉塞するシール部材が設け
られているため、トップパンチの上下等により発生する
不純物が混入するのを防ぐことができる。According to the present invention, the CIP molding device is
It has a powder feed port and a vent hole penetrating through the pressure vessel, and these have an opening on the inner wall of the hole provided in the pressure vessel for fittingly fitting the top punch, so the top punch must be removed. However, the molding powder can be filled, and therefore, it is possible to prevent impurities from being mixed into the molding space due to movement of the powder supply nozzle and the like. Further, since it is not necessary to attach and detach the top punch, there is an advantage that the molding efficiency is improved. Further, since the top punch is provided with a seal member that closes the gap between the inner peripheral surface of the hole and the outer peripheral surface of the top punch, it is possible to prevent impurities generated by the vertical movement of the top punch and the like from being mixed. You can
【００４０】 さらに、圧縮空気供給手段を設け、減圧
時に圧縮空気を成形用ゴム型内に導入することにより、
成形用ゴム型の復元を短時間で行うことができ、成形効
率の向上を図ることができる。本発明において、上記シ
ール部材の上方近傍にマグネットを設ければ、トップパ
ンチの作動によって発生する着磁性の物質を効果的に除
去でき、鉄系コンタミ欠陥の発生を防ぐことができる。Furthermore, by providing compressed air supply means and introducing compressed air into the molding rubber mold during depressurization,
The rubber mold for molding can be restored in a short time, and the molding efficiency can be improved. In the present invention, if a magnet is provided in the vicinity of the upper part of the seal member, the magnetized substance generated by the operation of the top punch can be effectively removed, and the occurrence of iron-based contamination defects can be prevented.
【図１】 （ａ）本発明のＣＩＰ成形装置の一例を示す
断面説明図である。（ｂ）（ａ）に示すＣＩＰ成形装置
の平面図である。FIG. 1A is a cross-sectional explanatory view showing an example of a CIP molding apparatus of the present invention. (B) It is a top view of the CIP molding device shown to (a).
【図２】 図１のＣＩＰ成形装置に用いられるトップパ
ンチの一例を示す説明図である。FIG. 2 is an explanatory diagram showing an example of a top punch used in the CIP molding apparatus of FIG.
【図３】 本発明のＣＩＰ成形装置の他の例を示す断面
説明図である。FIG. 3 is an explanatory cross-sectional view showing another example of the CIP molding apparatus of the present invention.
【図４】 図３のＣＩＰ成形装置を用いた粉末充填工程
を示す断面説明図である。FIG. 4 is a cross-sectional explanatory view showing a powder filling step using the CIP molding apparatus of FIG.
【図５】 図３のＣＩＰ成形装置を用いた加圧工程を示
す断面説明図である。5 is an explanatory cross-sectional view showing a pressurizing step using the CIP molding apparatus of FIG.
【図６】 図３のＣＩＰ成形装置を用いた減圧工程を示
す断面説明図である。FIG. 6 is an explanatory cross-sectional view showing a depressurizing step using the CIP molding apparatus of FIG.
【図７】 図３のＣＩＰ成形装置を用いた成形体取り出
し工程を示す断面説明図である。FIG. 7 is a cross-sectional explanatory view showing a molded body taking-out step using the CIP molding apparatus of FIG.
【図８】 従来のＣＩＰ成形方法の粉末充填工程を示す
断面説明図である。FIG. 8 is a cross-sectional explanatory view showing a powder filling step of a conventional CIP molding method.
【図９】 従来のＣＩＰ成形方法の加圧工程を示す断面
説明図である。FIG. 9 is an explanatory cross-sectional view showing a pressing step of a conventional CIP molding method.
【図１０】従来のＣＩＰ成形方法の減圧工程を示す断面
説明図である。FIG. 10 is a cross-sectional explanatory view showing a pressure reducing step of a conventional CIP molding method.
【図１１】従来のＣＩＰ成形方法の成形体取り出し工程
を示す断面説明図である。FIG. 11 is a cross-sectional explanatory view showing a molded body removing step of a conventional CIP molding method.
１・・・給粉ノズル、２・・・圧力容器、３・・・マンドレル、
４・・・成形用ゴム型、５・・・圧媒シールゴム、６・・・圧媒
出入口、７・・・シールゴムホルダー、８・・・成形空間、９
・・・ボトムパンチ、１０・・・トップゴム栓、１１・・・トッ
プパンチ、１２・・・成形体、１３・・・圧力容器蓋部の孔
部、１４・・・ＣＩＰ成形装置、１５・・・給粉口、１６・・・
通気口、１７・・・給粉口の開口部、１８・・・通気口の開口
部、１９・・・シールリング、２０・・・マグネット、２２・・
・圧縮空気供給手段、２３・・・吸引手段、２４・・・蓋部の
上端面、２５・・・給粉口の開口部、２６・・・通気口の開口
部、２７・・・第１三方弁、２８・・・真空ポンプ、２９・・・
粉末計量供給装置、３０・・・圧媒出口、３１・・・圧媒入
口、３２・・・圧媒タンク、３３・・・高圧ポンプ、３４・・・
増圧機、３５・・・第１高圧弁、３６・・・第４高圧弁、３７
・・・減圧制御装置、３８・・・第３高圧弁、３９・・・イジェ
クター、４０・・・第２高圧弁、４１・・・第２三方弁、４２
・・・エアードライヤー、４３・・・コンプレッサー。1 ... powder feeding nozzle, 2 ... pressure vessel, 3 ... mandrel,
4 ... molding rubber mold, 5 ... pressure medium sealing rubber, 6 ... pressure medium inlet / outlet, 7 ... seal rubber holder, 8 ... molding space, 9
... Bottom punch, 10 ... Top rubber stopper, 11 ... Top punch, 12 ... Molded body, 13 ... Hole portion of pressure vessel lid, 14 ... CIP molding device, 15. ..Filling port, 16 ...
Ventilation port, 17 ... Opening part of powder feeding port, 18 ... Opening part of ventilation port, 19 ... Seal ring, 20 ... Magnet, 22 ...
-Compressed air supply means, 23 ... Suction means, 24 ... Upper end surface of lid portion, 25 ... Opening portion of powder feeding port, 26 ... Opening portion of ventilation port, 27 ... First Three-way valve, 28 ... Vacuum pump, 29 ...
Powder measuring and supplying device, 30 ... Pressure medium outlet, 31 ... Pressure medium inlet, 32 ... Pressure medium tank, 33 ... High pressure pump, 34 ...
Booster, 35 ... First high pressure valve, 36 ... Fourth high pressure valve, 37
... Decompression control device, 38 ... Third high pressure valve, 39 ... Ejector, 40 ... Second high pressure valve, 41 ... Second three-way valve, 42
・ ・ ・ Air dryer, 43 ・ ・ ・ Compressor.
Claims (8)
たトップパンチとを備え、 当該成形用ゴム型内の成形空間に成形用粉末を充填した
後、当該成形用ゴム型の外周側から圧力媒体により静水
圧加圧を施すことにより成形を行い、続いて当該成形用
ゴム型の外周側から圧力媒体を除去することにより当該
成形用ゴム型を復元して成形体を取り出す乾式静水圧加
圧成形装置であって、 さらに、当該成形用粉末を当該成形空間内に供給する給
粉口、 供給された成形用粉末により置換された空気を除去する
とともに当該成形用ゴム型内に圧縮空気を導入するため
の通気口、及び当該成形用ゴム型内に圧縮空気を供給す
る圧縮空気供給手段を備え、 当該給粉口及び当該通気口は、当該圧力容器の当該孔部
内壁に開口部を有するとともに、当該開口部より斜め上
方に当該圧力容器を貫通し、 当該給粉口の開口部は当該通気口の開口部より上方に位
置し、 当該トップパンチは、当該孔部の内周面と当該トップパ
ンチの外周面との隙間を閉塞するシール部材を有し、 当該シール部材が当該給粉口及び当該通気口の上方に位
置するように当該トップパンチを移動させることによ
り、当該孔部が当該トップパンチによって閉塞された状
態で、当該給粉口及び当該通気口と当該成形空間とが連
通し、 当該シール部材が当該給粉口及び当該通気口の下方に位
置するように当該トップパンチを移動させることによ
り、当該給粉口及び当該通気口と当該成形空間との連通
が遮断され、 当該シール部材が当該給粉口の下方かつ当該通気口の上
方に位置するように当該トップパンチを移動させること
により、当該成形空間が当該通気口と連通するととも
に、当該給粉口と当該成形空間との連通が遮断されるこ
とを特徴とする乾式静水圧加圧成形装置。1. A molding rubber mold, a pressure container for accommodating the molding rubber mold, and a top punch fitted in a hole provided in an upper portion of the pressure container in a fitting manner. After filling the molding space with molding powder, molding is performed by applying hydrostatic pressure from the outer peripheral side of the molding rubber die with a pressure medium, and then removing the pressure medium from the outer peripheral side of the molding rubber die. A dry hydrostatic pressure molding device that restores the molding rubber mold to take out a molded body by further comprising: a powder supply port for supplying the molding powder into the molding space; The air supply port for removing the air displaced by the powder and for introducing the compressed air into the molding rubber die, and the compressed air supply means for supplying the compressed air into the molding rubber die are provided. The mouth and the vent are The pressure vessel has an opening on the inner wall of the hole and penetrates the pressure vessel diagonally above the opening, and the opening of the powder feeding port is located above the opening of the ventilation port, The punch has a seal member that closes the gap between the inner peripheral surface of the hole and the outer peripheral surface of the top punch, and the top member is positioned so that the seal member is located above the powder feeding port and the ventilation port. When the hole is closed by the top punch by moving the punch, the powder feeding port and the ventilation port communicate with the molding space, and the seal member causes the powder feeding port and the ventilation port. By moving the top punch so that it is positioned below the powder supply port, the communication between the powder supply port and the ventilation port and the molding space is blocked, and the sealing member is located below the powder supply port and at the ventilation port. Up By moving the top punch so that it is located at the position, the molding space communicates with the ventilation port, and the communication between the powder supply port and the molding space is blocked, and the dry hydrostatic pressure is applied. Press forming equipment.
上方近傍にマグネットを備えた請求項１に記載の乾式静
水圧加圧成形装置。2. The dry hydrostatic pressure molding apparatus according to claim 1, wherein the top punch is provided with a magnet near the upper portion of the seal member.
吸引排除する吸引手段を有する請求項１又は２に記載の
乾式静水圧加圧成形装置。3. The dry hydrostatic pressure molding apparatus according to claim 1, further comprising suction means for sucking and removing air in the molding space from the ventilation port.
給粉口と当該通気口の開口部間の角距離が１２０〜２４
０°であり、 当該シール部材が当該給粉口及び当該通気口の上方に位
置するように当該トップパンチを移動させた場合に、当
該トップパンチの下端部が、当該給粉口と当該通気口の
開口部間の空間を遮断する請求項３に記載の乾式静水圧
加圧成形装置。4. The angular distance between the powder feeding port and the opening of the ventilation port with respect to the center point of the inner circumference of the hole is 120 to 24.
When the top punch is moved so that the sealing member is located above the powder feeding port and the ventilation port, the lower end portion of the top punch has a lower end portion of the top punch and the ventilation port. The dry hydrostatic pressure molding apparatus according to claim 3, wherein a space between the openings of the is blocked.
ら除去する圧力媒体吸引手段を有する請求項１、２、３
又は４に記載の乾式静水圧加圧成形装置。5. A pressure medium suction means for removing the pressure medium from the outer peripheral side of the molding rubber die is provided.
Or the dry hydrostatic pressure molding apparatus according to item 4.
の乾式静水圧加圧成形装置を用いて成形を行うことを特
徴とする乾式静水圧加圧成形方法。6. A dry hydrostatic pressure molding method, wherein molding is performed using the dry hydrostatic pressure molding apparatus according to any one of claims 1 to 5.
圧力が５ｋｇｆ／ｃｍ2以上、４０ｋｇｆ／ｃｍ2以下の
範囲にある時に、圧力媒体の吸引除去を行う請求項６に
記載の乾式静水圧加圧成形方法。7. A pressure applied to the molding rubber mold by a pressure medium 5 kgf / cm 2 or more, when it is in the range of 40 kgf / cm 2 or less, the dry isostatic according to claim 6 for sucking and removing the pressure medium Press forming method.
圧力が５ｋｇｆ／ｃｍ2以上、４０ｋｇｆ／ｃｍ2以下の
範囲にある時に、圧縮空気の成形用ゴム型内への供給を
行う請求項６又７に記載の乾式静水圧加圧成形方法。8. A pressure applied to the molding rubber mold by a pressure medium 5 kgf / cm 2 or more, when it is in the range of 40 kgf / cm 2 or less, 6 also claim to supply into the molding rubber mold of the compressed air 7. The dry hydrostatic pressure molding method according to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07283610A JP3091403B2 (en) | 1995-10-31 | 1995-10-31 | Dry isostatic pressing apparatus and dry isostatic pressing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07283610A JP3091403B2 (en) | 1995-10-31 | 1995-10-31 | Dry isostatic pressing apparatus and dry isostatic pressing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09122994A true JPH09122994A (en) | 1997-05-13 |
| JP3091403B2 JP3091403B2 (en) | 2000-09-25 |
Family
ID=17667739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07283610A Expired - Fee Related JP3091403B2 (en) | 1995-10-31 | 1995-10-31 | Dry isostatic pressing apparatus and dry isostatic pressing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3091403B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016032821A (en) * | 2014-07-31 | 2016-03-10 | 株式会社アドテックエンジニアリング | Mold for manufacturing powder compact |
| CN109332688A (en) * | 2018-10-18 | 2019-02-15 | 山西金开源实业有限公司 | Dry bag formula isostatic pressing machine and its loading method |
| CN111739725A (en) * | 2020-07-10 | 2020-10-02 | 董中天 | Method and equipment for preparing anisotropic bonded magnet |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4527458B2 (en) * | 2004-07-08 | 2010-08-18 | 株式会社神戸製鋼所 | Molded rubber mold cleaning device for dry cold isostatic pressurizer |
-
1995
- 1995-10-31 JP JP07283610A patent/JP3091403B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016032821A (en) * | 2014-07-31 | 2016-03-10 | 株式会社アドテックエンジニアリング | Mold for manufacturing powder compact |
| CN109332688A (en) * | 2018-10-18 | 2019-02-15 | 山西金开源实业有限公司 | Dry bag formula isostatic pressing machine and its loading method |
| CN111739725A (en) * | 2020-07-10 | 2020-10-02 | 董中天 | Method and equipment for preparing anisotropic bonded magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3091403B2 (en) | 2000-09-25 |
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