JPH07227820A - Cast molding die and cast molding - Google Patents
Cast molding die and cast moldingInfo
- Publication number
- JPH07227820A JPH07227820A JP1915494A JP1915494A JPH07227820A JP H07227820 A JPH07227820 A JP H07227820A JP 1915494 A JP1915494 A JP 1915494A JP 1915494 A JP1915494 A JP 1915494A JP H07227820 A JPH07227820 A JP H07227820A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- die
- mold
- shape
- retaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明はセラミックス製品や粉末
冶金製品などを成形するための鋳込み成形型及び鋳込み
成形法に関する。詳しくは、成形型の使用効率がきわめ
て高い鋳込み成形型及び鋳込み成形法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting mold and a casting method for molding ceramic products, powder metallurgy products and the like. Specifically, the present invention relates to a casting mold and a casting method in which the use efficiency of the molding die is extremely high.
【0002】[0002]
【従来の技術】鋳込み成形は、原料粉末を水あるいは有
機溶剤などに分散したスラリーを使用し、石膏に代表さ
れる多孔質成形型にスラリーを流し込み、溶媒を型に吸
収させることにより所望形状の成形体を得る方法であ
る。この鋳込み成形は、複雑な形状品を簡便に成形する
ことができるため、非可塑性原料を使用するセラミック
ス製品等への応用が盛んに検討されている。2. Description of the Related Art In casting, a slurry in which raw material powder is dispersed in water or an organic solvent is used, and the slurry is poured into a porous molding die typified by gypsum, and the solvent is absorbed in the die to obtain a desired shape. It is a method of obtaining a molded body. Since this cast molding can easily mold a complex shaped product, its application to ceramic products using non-plastic raw materials is being actively studied.
【0003】この鋳込み成形においては、通常の場合、
成形直後の成形体はハンドリング性に乏しい。このた
め、原料粉末の粒度を調整し、高密度成形体とする、バ
インダーを添加し素地の強度を高める、さらには型内で
ある程度乾燥した後脱型すること等が行われている。In this cast molding, normally,
The molded body immediately after molding has poor handling property. Therefore, the particle size of the raw material powder is adjusted to form a high-density molded body, a binder is added to increase the strength of the base material, and further, the material is dried in the mold to some extent and then demolded.
【0004】[0004]
【発明が解決しようとする課題】複雑形状品、薄肉製品
等を鋳込み成形によって製造する場合、保形性、ハンド
リング性を向上させるために、原料粉末の粒度分布を厳
密に調整し、さらには高圧力で鋳込み成形する等して高
密度化する必要があり、成形操作が面倒であった。When a complex shaped product, a thin-walled product, etc. are manufactured by casting, the particle size distribution of the raw material powder is strictly adjusted in order to improve the shape retention and handling properties. It was necessary to densify by pressure casting and the like, and the molding operation was troublesome.
【0005】また、ハンドリング性の良い成形体を得る
ために、十分な量のバインダーを添加し、成形終了後も
直ちに脱型せず、成形体を成形型内で徐々に乾燥させ、
収縮して型離れした後、脱型する操作が行われている
が、この場合、成形型の使用効率が低い。Further, in order to obtain a molded product having a good handling property, a sufficient amount of binder is added, the molded product is not immediately released from the mold after completion of the molding, and the molded product is gradually dried in the molding die.
After the contraction and mold release, an operation of removing the mold is performed, but in this case, the use efficiency of the molding die is low.
【0006】[0006]
【課題を解決するための手段】請求項1の鋳込み成形型
は、成形空間を取り囲む複数個の割型を有する鋳込み成
形型において、該成形空間の内面の一部に該割型とは別
体の、該成形型から脱型された成形体を保形するための
保形型を設けたことを特徴とするものである。A casting mold according to claim 1 is a casting mold having a plurality of split molds surrounding a molding space, wherein a part of the inner surface of the molding space is separate from the split mold. In the present invention, a shape-retaining die for retaining the shape of the molded body released from the molding die is provided.
【0007】請求項2の鋳込み成形型は請求項1におい
て、前記保形型は、成形物の側面を取り巻く形状である
ことを特徴とするものである。According to a second aspect of the present invention, there is provided the casting mold according to the first aspect, wherein the shape-retaining die has a shape surrounding a side surface of the molded product.
【0008】請求項3の鋳込み成形法は、請求項1又は
2の鋳込み成形型内にスラリーを供給し、該スラリー中
の液体を型に吸収させて成形体を該成形空間内に形成
し、その後、型開きし、成形体を前記保形型と一体のま
ま取り出し、その後、所定時間経過した後、保形型と成
形体とを分離することを特徴とするものである。According to the casting method of claim 3, the slurry is supplied into the casting mold of claim 1 or 2, and the liquid in the slurry is absorbed by the mold to form a molded body in the molding space. After that, the mold is opened, the molded body is taken out together with the shape-retaining mold, and after a predetermined time has passed, the shape-retaining mold and the molded body are separated.
【0009】本発明において、成形型は、成形空間に臨
む面の少なくとも一部が石膏、多孔質合成樹脂、多孔質
金属、多孔質セラミックスなど各種の吸液性材料よりな
るものが用いられる。In the present invention, as the mold, at least a part of the surface facing the molding space is made of various liquid absorbing materials such as gypsum, porous synthetic resin, porous metal and porous ceramics.
【0010】この成形型は、全体として吸液性材料にて
構成されていても良く、成形空間に臨む面の全体又は一
部が吸液性材料にて構成され、他の部分は非吸液性材料
にて構成されていても良い。なお、成形空間に臨む面の
うち保形型によって覆われる部分は吸液性材料にする必
要は特にない。The mold may be made of a liquid-absorbent material as a whole, and all or part of the surface facing the molding space is made of a liquid-absorbent material, and the other parts are non-liquid-absorbent. It may be made of a conductive material. It should be noted that the portion of the surface facing the molding space, which is covered by the shape retaining mold, need not be made of a liquid absorbing material.
【0011】この成形型は、例えば上型、下型の2点あ
るいは上型、下型、中型(枠型)の3点にて構成され
る。この中型は、上型と下型との間に挟まれるものであ
る。この上型、下型或いは中型は、成形体の形状に応じ
複数個の割型からなるものであっても良い。The molding die is composed of, for example, two points of an upper die and a lower die, or three points of an upper die, a lower die and a middle die (frame die). The middle mold is sandwiched between the upper mold and the lower mold. The upper mold, the lower mold or the middle mold may be composed of a plurality of split molds depending on the shape of the molded body.
【0012】中空状の成形体を成形する場合には、必要
に応じ中子型を上型、下型又は中型に連結しても良い。When molding a hollow molded body, the core mold may be connected to an upper mold, a lower mold or a middle mold as required.
【0013】成形型内に配置される保形型は、成形空間
内における成形体の側面を取り巻く形状のものが好適で
あるが、成形体の上面から下面にかけて取り巻く形状の
ものであっても良い。The shape-retaining die arranged in the molding die preferably has a shape surrounding the side surface of the molding in the molding space, but may have a shape surrounding the molding body from the upper surface to the lower surface. .
【0014】保形型は、吸液性のものであっても良く、
非吸液性のものであっても良い。保形型を吸液性とした
場合、保形型の厚さは必要な吸液量に見合う厚さとなる
ように選定される。保形型を非吸液性とする場合、保形
型の厚さは保形型のハンドリング性、成形型の耐圧強度
などを勘案し、可能な限り薄くするのが好ましい。The shape-retaining type may be a liquid-absorbing type,
It may be non-liquid absorbent. When the shape-retaining mold is made to be liquid-absorbent, the thickness of the shape-retaining mold is selected to be a thickness commensurate with the required amount of liquid absorption. When the shape-retaining mold is made non-absorbent, it is preferable that the thickness of the shape-retaining mold is as thin as possible in consideration of the handling property of the shape-retaining mold and the pressure resistance of the molding die.
【0015】この成形型内に供給されるスラリーは、セ
ラミック原料粉末のスラリーであっても良く、金属粉末
や合成樹脂粉末のスラリーであっても良い。The slurry supplied into the molding die may be a slurry of ceramic raw material powder or a slurry of metal powder or synthetic resin powder.
【0016】このスラリーの液体は水、有機溶媒のいず
れでも良い。このスラリーには適宜のバインダーを含有
させても良い。The liquid of this slurry may be either water or an organic solvent. This slurry may contain an appropriate binder.
【0017】[0017]
【作用】請求項1,2の鋳込み成形型を用いて鋳込み成
形を行なう場合、請求項3の如く、成形空間内にスラリ
ーを供給し、スラリー中の液体分を成形型(もし、保形
型が吸液性のものであれば、さらにこの保形型にも)吸
収させる。When casting is carried out using the casting molds of claims 1 and 2, slurry is supplied into the molding space as in claim 3, and the liquid component in the slurry is transferred to the molding die (if If it is liquid-absorbent, it is also absorbed in this shape retention type.
【0018】液体が吸収されることにより成形型内に成
形体が形成される。本発明では、成形体が保形型によっ
て保形されているため、この成形体の液体含有率が高く
成形体の強度が低い状態にあっても、成形型を型開き
し、成形体を保形型と共に成形型外に取り出すことがで
きる。即ち、成形体の強度が低くても、保形型を把むこ
とにより成形体を移動させることができる。また、保形
型によって保護されるため、成形体が崩れたり割れたり
することもない。By absorbing the liquid, a molded body is formed in the molding die. In the present invention, since the molded body is shaped by the shape-holding mold, even when the molded body has a high liquid content and the strength of the molded body is low, the mold is opened and the molded body is held. It can be taken out of the forming die together with the forming die. That is, even if the strength of the molded body is low, the molded body can be moved by gripping the shape retention mold. Further, since the shape-retaining mold protects the molded body, it does not break or crack.
【0019】保形型に保護された成形体は、乾燥させる
か、又は保形型が吸液性を有している場合には保形型に
吸液させることにより、次第に強度が高まると共に、収
縮して保形型から離型する。そこで、保形型と成形体と
を分離する。なお、成形体の収縮が小さい場合であって
も、成形体が十分な強度を有するようになったときに成
形体と保形型とを分離するようにしても良い。The molded body protected by the shape-retaining mold is dried or, if the shape-retaining mold has a liquid-absorbing property, absorbed by the shape-retaining mold, whereby the strength is gradually increased, and Shrink and release from shape retention mold. Therefore, the shape-retaining mold and the molded body are separated. Even if the shrinkage of the molded product is small, the molded product and the shape-retaining mold may be separated when the molded product has sufficient strength.
【0020】なお、請求項2の成形型にあっては、保形
型が成形体の側面を取り巻いているため、保形型付きの
成形体を把み易い。In the molding die according to the second aspect, since the shape-retaining mold surrounds the side surface of the molding, it is easy to grasp the molding with the shape-retaining mold.
【0021】[0021]
【実施例】第1,2図は第1実施例を示すものであり、
上型1、中型2,3及び下型4にて成形型が構成され、
円柱形の成形空間が形成されている。この成形空間内に
円筒状の保形型5が装填されている。上型1及び下型4
は吸液性材料にて構成され、中型2,3及び保形型5は
非吸液性材料にて構成されている。また、下型4に設け
られたスラリーの供給孔6の内面は非吸液性材料6aに
て構成され、孔6内でのスラリーの固化を防止するよう
にしている。Embodiments FIGS. 1 and 2 show a first embodiment,
The upper die 1, the middle dies 2, 3 and the lower die 4 constitute a molding die,
A cylindrical molding space is formed. A cylindrical shape retaining mold 5 is loaded in this molding space. Upper mold 1 and lower mold 4
Is made of a liquid absorbing material, and the middle dies 2 and 3 and the shape retaining mold 5 are made of a non-liquid absorbing material. Further, the inner surface of the slurry supply hole 6 provided in the lower mold 4 is made of a non-liquid-absorbent material 6a to prevent the slurry from solidifying in the hole 6.
【0022】第2図の如く型組みしてから、この孔6か
らスラリーを供給し、液を上型1及び下型4に吸収させ
る。After the mold is assembled as shown in FIG. 2, the slurry is supplied through the holes 6 so that the liquid is absorbed by the upper mold 1 and the lower mold 4.
【0023】成型空間内に成形体が形成されたならば、
直ちに型開きし、保形型5と共に成形体を取り出し、乾
燥工程へ送る。上型1、中型2,3及び下型4は直ちに
(又は必要に応じ乾燥された後)、新たな保形型5と共
に型組みされ、成形に使用される。Once the molded body is formed in the molding space,
Immediately, the mold is opened, the molded product is taken out together with the shape-retaining mold 5, and sent to the drying step. The upper mold 1, the middle molds 2, 3 and the lower mold 4 are immediately (or after being dried if necessary) assembled with a new shape-retaining mold 5 and used for molding.
【0024】第3〜5図は第2の実施例を示すものであ
り、上型7と下型8とにより成形型が構成され、下型8
に設けられた円形凹部よりなる成形空間内に円柱形の保
形型9が装填されている。上型7と下型8とは吸液性材
料よりなり、保形型9もこれらと同材質の吸液性材料に
て構成されている。FIGS. 3 to 5 show the second embodiment, in which the upper die 7 and the lower die 8 constitute a forming die, and the lower die 8
A cylindrical shape-preserving die 9 is loaded in a molding space formed by a circular recess provided in the. The upper mold 7 and the lower mold 8 are made of a liquid absorbing material, and the shape retaining mold 9 is also made of a liquid absorbing material of the same material.
【0025】なお、凹部の縁に切欠部10が形成されて
いるが、これは保形型9を取り出す際に挟持治具11や
指先などを差し込むために設けられている。A notch 10 is formed at the edge of the recess, which is provided for inserting a holding jig 11 or a fingertip when the shape retaining mold 9 is taken out.
【0026】第4図の如く型組みした後、下型8のスラ
リー供給孔12からスラリーが成形空間内に供給され
る。After the mold is assembled as shown in FIG. 4, the slurry is supplied into the molding space through the slurry supply hole 12 of the lower mold 8.
【0027】成形体13を取り出すときには、第5図の
如く、治具11や指先を切欠部10に差し込み、保形型
9を挟んで保形型9共々取り出す。When the molded body 13 is taken out, as shown in FIG. 5, the jig 11 and the fingertip are inserted into the notches 10 and the shape-holding die 9 is sandwiched and the shape-holding die 9 is taken out.
【0028】取り出された成形体は、保形型9と共に乾
燥工程に送られ、さらに保形型9に吸液させると共に乾
燥させ、その後、保形型9と成形体とを分離する。The molded body thus taken out is sent to the drying step together with the shape-retaining mold 9, and further absorbed into the shape-retaining mold 9 and dried, and thereafter, the shape-retaining mold 9 and the molded body are separated.
【0029】[0029]
【発明の効果】本発明の鋳込み成形型及び鋳込み成形法
によると、成形型を効率良く成形に供することができ、
成形型コストを低減できる。また、成形型からは成形体
が保形型と一緒に取り出され、成形体に直接触れること
なく成形体を取り扱うことができるため、成形体の変形
や欠けが防止される。また、工程の自動化も容易とな
る。さらに、成形体を保形型のみと一緒に乾燥すれば良
いため、成形体を成形型に内蔵させたまま長時間乾燥さ
せる従来例に比べ、乾燥スペースが大幅に節減される。According to the casting mold and the casting method of the present invention, the molding die can be efficiently used for molding.
Mold cost can be reduced. Further, since the molded body is taken out together with the shape-retaining mold from the molding die and the molded body can be handled without directly touching the molded body, deformation and chipping of the molded body can be prevented. In addition, the process can be easily automated. Furthermore, since it is sufficient to dry the molded body together with the shape-retaining mold only, the drying space is significantly reduced compared to the conventional example in which the molded body is dried for a long period of time while being built in the molding mold.
【0030】なお、請求項2によると、成形体を内包し
た保形型の取扱いが容易になる。According to the second aspect, it becomes easy to handle the shape-retaining mold containing the molded body.
【図1】第1実施例に係る成形型の斜視図である。FIG. 1 is a perspective view of a molding die according to a first embodiment.
【図2】第1実施例に係る成形型の断面図である。FIG. 2 is a cross-sectional view of the molding die according to the first embodiment.
【図3】第2実施例に係る成形型の斜視図である。FIG. 3 is a perspective view of a molding die according to a second embodiment.
【図4】第2実施例に係る成形型の断面図である。FIG. 4 is a cross-sectional view of a molding die according to a second embodiment.
【図5】第2実施例に係る成形型の型開き時の斜視図で
ある。FIG. 5 is a perspective view of the molding die according to the second embodiment when the die is opened.
1,7 上型 2,8 下型 3,4 中型 5,9 保形型 1,7 Upper mold 2,8 Lower mold 3,4 Medium mold 5,9 Conservation mold
Claims (3)
る鋳込み成形型において、 該成形空間の内面の一部に該割型とは別体の、該成形型
から脱型された成形体を保形するための保形型を設けた
ことを特徴とする鋳込み成形型。1. A casting mold having a plurality of mold halves surrounding a molding space, wherein a molded body separated from the mold and separated from the mold is provided on a part of the inner surface of the molding space. A casting mold characterized by having a shape-retaining mold for retaining the shape.
物の側面を取り巻く形状であることを特徴とする鋳込み
成形型。2. The casting mold according to claim 1, wherein the shape-retaining mold has a shape surrounding a side surface of a molded product.
リーを供給し、該スラリー中の液体を型に吸収させて成
形体を該成形空間内に形成し、その後、型開きし、成形
体を前記保形型と一体のまま取り出し、その後、所定時
間経過した後、保形型と成形体とを分離することを特徴
とする鋳込み成形法。3. A slurry is supplied into the casting mold according to claim 1 or 2, and the liquid in the slurry is absorbed by the mold to form a molded body in the molding space, and then the mold is opened and molded. A cast molding method, wherein the body is taken out as it is with the shape-retaining mold, and after a predetermined time has passed, the shape-retaining mold and the molded body are separated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1915494A JPH07227820A (en) | 1994-02-16 | 1994-02-16 | Cast molding die and cast molding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1915494A JPH07227820A (en) | 1994-02-16 | 1994-02-16 | Cast molding die and cast molding |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07227820A true JPH07227820A (en) | 1995-08-29 |
Family
ID=11991509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1915494A Withdrawn JPH07227820A (en) | 1994-02-16 | 1994-02-16 | Cast molding die and cast molding |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07227820A (en) |
-
1994
- 1994-02-16 JP JP1915494A patent/JPH07227820A/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010508 |