JPH04270602A - High-pressure casting mold and molding method using said mold - Google Patents
High-pressure casting mold and molding method using said moldInfo
- Publication number
- JPH04270602A JPH04270602A JP3053894A JP5389491A JPH04270602A JP H04270602 A JPH04270602 A JP H04270602A JP 3053894 A JP3053894 A JP 3053894A JP 5389491 A JP5389491 A JP 5389491A JP H04270602 A JPH04270602 A JP H04270602A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding space
- pressure casting
- thin
- thick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 58
- 238000005266 casting Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 14
- 238000009751 slip forming Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000004421 molding of ceramic Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/261—Moulds therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は肉厚差のあるセラミック
製品を高圧鋳込み成形するための高圧鋳込み成形型及び
これを用いた成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure casting mold for high-pressure casting molding of ceramic products having different wall thicknesses, and a molding method using the same.
【０００２】0002
【従来の技術】石膏や多孔質樹脂のような多孔質材料よ
りなる分割型の内部にセラミックスラリーを高圧で注入
し、水分を分割型の壁面から吸収させて成形体を得る高
圧鋳込み成形型は従来から知られている。ところが分割
型の内部の成形空間が図２に示すように肉厚部成形空間
６と肉薄部成形空間７とからなる場合には、スラリー注
入時に肉薄部成形空間７の内面に着肉したセラミックス
ラリーが障害となって肉厚部成形空間６へのセラミック
スラリーの流動を阻害するので、各肉厚部成形空間６に
対してそれぞれ鋳込み口８を形成しなければならなかっ
た。しかもそのような工夫を行ってもなお、成形体の肉
厚部の密度が肉薄部の密度よりも小さくなり、均一な密
度が求められる成形体についてはその成形歩留りが悪い
という欠点があった。[Prior Art] A high-pressure casting mold is used to obtain a molded product by injecting ceramic slurry at high pressure into the interior of a divided mold made of a porous material such as gypsum or porous resin, and absorbing moisture from the wall of the divided mold. It has been known for a long time. However, when the molding space inside the split mold consists of a thick part molding space 6 and a thin part molding space 7 as shown in FIG. Since this becomes an obstacle and prevents the ceramic slurry from flowing into the thick-walled molding space 6, a casting port 8 had to be formed for each thick-walled molding space 6, respectively. Moreover, even with such measures, the density of the thicker part of the molded product is lower than the density of the thinner part, and the molding yield for molded products required to have uniform density is poor.
【０００３】0003
【発明が解決しようとする課題】本発明は上記したよう
な従来の問題点を解消して、肉厚部と肉薄部とからなる
成形体を、多数の鋳込み口を設けることなく均一な密度
で高圧鋳込み成形することができる高圧鋳込み成形型及
びこれを用いた成形方法を提供するためになされたもの
である。[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems and makes it possible to produce a molded product consisting of thick and thin parts with uniform density without having to provide a large number of casting holes. This invention was made in order to provide a high-pressure casting mold capable of high-pressure casting and a molding method using the same.
【０００４】0004
【課題を解決するための手段】上記の課題を解決するた
めの第１の発明は、金属枠の内部に多孔質材料よりなる
分割型を設けた高圧鋳込み成形型において、分割型の内
部に肉厚部成形空間と肉薄部成形空間とを連続して形成
するとともに、金属枠の外側からこれらの成形空間に連
通する鋳込み口を形成し、かつ肉厚部成形空間の周囲の
多孔質材料よりなる分割型の通気量を肉薄部成形空間の
周囲の多孔質材料よりなる分割型の通気量よりも大とし
たことを特徴とする高圧鋳込み成形型を要旨とするもの
である。また第２の発明は、上記の高圧鋳込み成形型の
金属枠の内部を減圧しながら鋳込み口からセラミックス
ラリーを注入して肉厚部と肉薄部とを同時に高圧鋳込み
成形し、次に金属枠の内部を加圧して成形体を離型する
ことを特徴とする高圧鋳込み成形方法を要旨とするもの
である。[Means for Solving the Problems] A first invention for solving the above-mentioned problems is a high-pressure casting mold in which a divided mold made of a porous material is provided inside a metal frame. A molding device that continuously forms a thick part molding space and a thin part molding space, and also forms a casting port that communicates with these molding spaces from the outside of the metal frame, and is made of a porous material around the thick part molding space. The gist of the present invention is a high-pressure casting mold characterized in that the amount of ventilation in the divided mold is larger than that in the divided mold made of a porous material surrounding the thin-walled molding space. In addition, a second invention is to inject ceramic slurry from the casting port while reducing the pressure inside the metal frame of the high-pressure casting mold to perform high-pressure casting molding into the thick wall portion and thin wall portion at the same time, and then to form the metal frame of the metal frame. The gist of the present invention is a high-pressure casting method characterized by releasing a molded body by pressurizing the inside thereof.
【０００５】[0005]
【実施例】次に本発明を図１に示す実施例によって更に
詳細に説明する。図中、１は分割可能な金属枠、２はそ
の内部に固定治具３により僅かな空隙部４を設けて固定
した分割型である。この分割型２は石膏又は多孔質樹脂
のような多孔質材料よりなるものである。５は分割型２
の内部に形成された成形空間であり、肉厚部成形空間６
と肉薄部成形空間７とが連続して形成されている。EXAMPLE Next, the present invention will be explained in more detail with reference to an example shown in FIG. In the figure, 1 is a divisible metal frame, and 2 is a split type fixed inside thereof with a small gap 4 provided by a fixing jig 3. This split mold 2 is made of a porous material such as gypsum or porous resin. 5 is split type 2
It is a molding space formed inside the thick part molding space 6.
and a thin-walled portion molding space 7 are continuously formed.
【０００６】本発明ではこれらの分割型２のうちの肉厚
部成形空間６の周囲の壁面と肉薄部成形空間７の周囲の
壁面との通気量を変え、肉厚部成形空間６の周囲の多孔
質材料よりなる分割型２の通気量を肉薄部成形空間７の
周囲の多孔質材料よりなる分割型２の通気量よりも大き
く設定してある。壁面の通気量を変えるには、例えば気
孔径を肉厚部成形空間６の周囲の壁面では１０μｍ 前
後とし、肉薄部成形空間７の周囲の壁面ではその１／２
〜１／５ の２〜５μｍ 程度とする方法を取ること
ができ、このために実施例では肉薄部成形空間７の周囲
の壁面の材質だけを他の部分の材質よりも細かくしてあ
る。しかし全体を同質の材料で構成しておき、その後に
肉薄部成形空間７の周囲の壁面のみを目封じすることに
より通気量を変える方法を取ってもよく、あるいは肉薄
部成形空間７の周囲の部分のみを別の材料により予め成
形しておき、分割型２の内部にインサートする方法を取
ることもできる。In the present invention, the amount of ventilation between the wall surface around the thick part molding space 6 and the wall surface around the thin wall part molding space 7 of these divided molds 2 is changed, and the air flow around the thick part molding space 6 is changed. The ventilation amount of the divided mold 2 made of a porous material is set to be larger than the ventilation amount of the divided mold 2 made of a porous material surrounding the thin-walled portion molding space 7. To change the amount of ventilation on the wall surface, for example, the pore diameter should be set to around 10 μm on the wall surface around the thick wall molding space 6, and 1/2 of that on the wall surface around the thin wall molding space 7.
It is possible to take a method in which the thickness is about 2 to 5 μm, which is about 1/5, and for this reason, in the embodiment, only the material of the wall surface around the thin-walled portion molding space 7 is made finer than the material of the other parts. However, the entire structure may be made of the same material, and then the amount of airflow may be changed by sealing only the wall surface around the thin-walled portion molding space 7. It is also possible to use a method in which only the portion is pre-molded from a different material and inserted into the split mold 2.
【０００７】なお８は上記した成形空間５の内部にセラ
ミックスラリーを注入するための鋳込み口である。この
鋳込み口８は金属枠１の外側から成形空間５に連通させ
て設けられる。図１では鋳込み口８が１箇所の例を示し
ているが、肉厚部成形空間６及び肉薄部成形空間７の形
状及び個数等により適宜複数個の鋳込み口８を設けるこ
ともできる。しかし本発明によれば図１のように単一の
鋳込み口８とした場合にも充分均一な成形体が成形でき
、構造及び取扱いが簡素化できる利点がある。また鋳込
み口８の周囲は非吸水性の材料により構成することが好
ましい。Reference numeral 8 designates a casting port for injecting ceramic slurry into the molding space 5 described above. The casting port 8 is provided so as to communicate with the molding space 5 from the outside of the metal frame 1. Although FIG. 1 shows an example in which there is one casting port 8, a plurality of casting ports 8 may be provided as appropriate depending on the shape and number of the thick-walled portion molding space 6 and the thin-walled portion molding space 7. However, according to the present invention, even when a single pouring port 8 is used as shown in FIG. 1, a sufficiently uniform molded product can be formed, and the structure and handling can be simplified. Further, it is preferable that the periphery of the pouring port 8 be made of a non-water-absorbing material.
【０００８】[0008]
【作用】このように構成された第１の発明の高圧鋳込み
成形型を用いてセラミック成形体を成形するには、まず
図示を略したエアーパイプを通じて金属枠１の内側の空
隙部４を減圧しながら単一の鋳込み口８からセラミック
スラリーを成形空間５の内部に注入する。このとき、分
割型２のうちの肉厚部成形空間６の周囲の壁面の通気量
は大きく、また肉厚部成形空間６、６の間に位置する肉
薄部成形空間７を構成する部分の壁面は通気量を小さく
してあるので、セラミックスラリーは肉薄部成形空間７
ではあまり水分を吸収されることなく成形空間５の全体
に流入することができる。[Operation] In order to mold a ceramic molded body using the high-pressure casting mold of the first invention constructed as described above, first, the pressure in the cavity 4 inside the metal frame 1 is reduced through an air pipe (not shown). At the same time, the ceramic slurry is injected into the molding space 5 from a single pouring port 8. At this time, the amount of ventilation on the wall surface around the thick part molding space 6 of the divided mold 2 is large, and the wall surface of the part forming the thin part molding space 7 located between the thick part molding spaces 6, 6 is large. Since the ventilation amount is small, the ceramic slurry is poured into the thin-walled molding space 7.
Therefore, water can flow into the entire molding space 5 without being absorbed much.
【０００９】次いで鋳込み口８を通じて成形空間５の内
部を２０〜２００ｋｇｆ／ｃｍ２ に加圧すれば、前記
の減圧効果と相俟って分割型２のうちの通気量の大きい
肉厚部成形空間６では着肉が急速に進行し、これに比較
して通気量の小さい肉薄部成形空間７では着肉がゆっく
りと進行し、その結果として肉厚部と肉薄部とからなり
、しかもいずれの部分にも密度の差のない均一な成形体
が成形されることとなる。Next, if the inside of the molding space 5 is pressurized to 20 to 200 kgf/cm2 through the pouring port 8, the molding space 6 in the thick part of the split mold 2 with a large airflow rate is combined with the above-mentioned pressure reduction effect. Thickening progresses rapidly in the thin-walled part molding space 7, which has a small amount of ventilation compared to this. Also, a uniform molded body with no difference in density is molded.
【００１０】このようにして成形が完了すると、前とは
逆に金属枠１の内側の空隙部４を加圧する。この結果、
多孔質材料からなる分割型２の成形空間５と成形体との
間に空気層又は水膜が形成され、成形体を容易に離型す
ることができるから、分割型２を開いて成形体を取り出
せばよい。[0010] When the molding is completed in this manner, the cavity 4 inside the metal frame 1 is pressurized in the opposite direction. As a result,
An air layer or a water film is formed between the molding space 5 of the split mold 2 made of porous material and the molded product, and the molded product can be easily released, so the split mold 2 is opened and the molded product is removed. Just take it out.
【００１１】[0011]
【発明の効果】以上に説明したように、本発明の高圧鋳
込み成形型及びそれを用いた成形方法によれば、肉厚部
と肉薄部とからなる成形体を均一な密度で高圧鋳込み成
形することができるものであり、成形歩留りを高めるこ
とができる。また鋳込み口を単一とした場合には、型の
構造及びその取扱いを簡素化することができる。よって
本発明は従来の問題点を解消した高圧鋳込み成形型及び
それを用いた成形方法として、産業の発展に寄与すると
ころは極めて大きいものである。[Effects of the Invention] As explained above, according to the high-pressure casting mold of the present invention and the molding method using the same, a molded article consisting of a thick wall portion and a thin wall portion can be high-pressure casting molded with uniform density. It is possible to increase the molding yield. Moreover, when the casting opening is made single, the structure of the mold and its handling can be simplified. Therefore, the present invention greatly contributes to the development of industry as a high-pressure casting mold and a molding method using the same that solve the conventional problems.
【図１】本発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】従来の高圧鋳込み成形型を示す断面図である。FIG. 2 is a sectional view showing a conventional high-pressure casting mold.
１ 金属枠 ２ 分割型 ３ 固定治具 ４ 空隙部 ５ 成形空間 ６ 肉厚部成形空間 ７ 肉薄部成形空間 ８ 鋳込み口 1 Metal frame 2. Split type 3 Fixing jig 4 Vacancy 5 Molding space 6 Thick wall molding space 7 Thin wall molding space 8 Casting port
Claims (2)
割型を設けた高圧鋳込み成形型において、分割型の内部
に肉厚部成形空間と肉薄部成形空間とを連続して形成す
るとともに、金属枠の外側からこれらの成形空間に連通
する鋳込み口を形成し、かつ肉厚部成形空間の周囲の多
孔質材料よりなる分割型の通気量を肉薄部成形空間の周
囲の多孔質材料よりなる分割型の通気量よりも大とした
ことを特徴とする高圧鋳込み成形型。Claim 1: A high-pressure casting mold in which a divided mold made of porous material is provided inside a metal frame, in which a thick-walled part molding space and a thin-walled part molded space are continuously formed inside the divided mold, and A casting port is formed that communicates with these molding spaces from the outside of the metal frame, and the ventilation volume of the split mold made of porous material around the thick-walled molding space is controlled by the porous material around the thin-walled molding space. A high-pressure casting mold characterized by a larger air flow than a split mold.
金属枠の内部を減圧しながら鋳込み口からセラミックス
ラリーを注入して肉厚部と肉薄部とを同時に高圧鋳込み
成形し、次に金属枠の内部を加圧して成形体を離型する
ことを特徴とする高圧鋳込み成形方法。2. The ceramic slurry is injected from the casting port while reducing the pressure inside the metal frame of the high-pressure casting mold according to claim 1, and the thick and thin parts are simultaneously high-pressure cast-molded, and then the metal A high-pressure casting method characterized by pressurizing the inside of a frame to release the molded object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053894A JPH04270602A (en) | 1991-02-26 | 1991-02-26 | High-pressure casting mold and molding method using said mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3053894A JPH04270602A (en) | 1991-02-26 | 1991-02-26 | High-pressure casting mold and molding method using said mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04270602A true JPH04270602A (en) | 1992-09-28 |
Family
ID=12955435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3053894A Pending JPH04270602A (en) | 1991-02-26 | 1991-02-26 | High-pressure casting mold and molding method using said mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04270602A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016117688A1 (en) * | 2015-01-23 | 2016-07-28 | Toto株式会社 | Cast molded body and method for producing same |
| EP4574372A1 (en) * | 2023-12-19 | 2025-06-25 | Placoplatre | Gypsum mould, method for making the same and porous drying structure for use in said mould |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63120604A (en) * | 1986-11-10 | 1988-05-25 | 株式会社東芝 | Manufacture of molded form |
-
1991
- 1991-02-26 JP JP3053894A patent/JPH04270602A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63120604A (en) * | 1986-11-10 | 1988-05-25 | 株式会社東芝 | Manufacture of molded form |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016117688A1 (en) * | 2015-01-23 | 2016-07-28 | Toto株式会社 | Cast molded body and method for producing same |
| EP4574372A1 (en) * | 2023-12-19 | 2025-06-25 | Placoplatre | Gypsum mould, method for making the same and porous drying structure for use in said mould |
| WO2025131473A1 (en) * | 2023-12-19 | 2025-06-26 | Placoplatre | Gypsum mould, method for making the same and porous drying structure for use in said mould |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19941007 |