JPH0476762B2 - - Google Patents
Info
- Publication number
- JPH0476762B2 JPH0476762B2 JP1158554A JP15855489A JPH0476762B2 JP H0476762 B2 JPH0476762 B2 JP H0476762B2 JP 1158554 A JP1158554 A JP 1158554A JP 15855489 A JP15855489 A JP 15855489A JP H0476762 B2 JPH0476762 B2 JP H0476762B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- porous
- plaster
- tube
- gypsum
- 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.)
- Expired
Links
- 239000011505 plaster Substances 0.000 claims description 51
- 230000035699 permeability Effects 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000009415 formwork Methods 0.000 claims description 7
- 239000011162 core material Substances 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 description 23
- 229910052602 gypsum Inorganic materials 0.000 description 23
- 238000000465 moulding Methods 0.000 description 20
- 239000012212 insulator Substances 0.000 description 11
- 239000000919 ceramic Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004513 sizing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
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)
- Moulds, Cores, Or Mandrels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Insulating Bodies (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は主として食器、碍子等、各種陶磁器製
品の製造に使用される多孔質石膏型及びその製造
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a porous gypsum mold used mainly for manufacturing various ceramic products such as tableware and insulators, and a method for manufacturing the same.
（従来の技術）
例えば食器、碍子等の各種陶磁器製品の製造に
は従来から例えば特公昭56−14451号公報に記載
されるようなセラミツク粒子を合成樹脂により固
化した内外２層構造の多孔質セラミツク成形型が
使用されているが、きわめて高価であるうえに緻
密な成形表面層の一部が破損したような場合には
修理が不可能であるので、成形型全体を廃棄しな
ければならず、経済性の点で問題があつた。そこ
で本発明者等は比較的安価な多孔質石膏を用いて
通気量の多い前記公報に記載されると同様な成形
型を製作することを試みたが、成形体の形状が大
きく重量の重い例えば碍子製造に適する十分な通
気性を有する石膏型は製作できなかつた。(Prior art) For the manufacture of various ceramic products such as tableware and insulators, porous ceramics with a two-layered structure, the inner and outer layers, are made by solidifying ceramic particles with synthetic resin, as described in Japanese Patent Publication No. 56-14451. Molding molds are used, but they are extremely expensive, and if part of the dense molding surface layer is damaged, it cannot be repaired, so the entire mold must be discarded. There was a problem with economic efficiency. Therefore, the inventors of the present invention attempted to manufacture a mold similar to that described in the above-mentioned publication with a large amount of ventilation using relatively inexpensive porous gypsum, but the molded object was large in shape and heavy. It was not possible to produce a plaster mold with sufficient air permeability suitable for manufacturing insulators.
（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決し
て、安価であること、食器、碍子等の各種陶磁器
製品の製造に適する十分な通気性と表面の滑らか
さを持つこと、破損した場合の補修が簡単に行え
ること等の条件を満足させることのできる多孔質
石膏型及びその製造方法を提供するために完成さ
れたものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and achieves low cost, sufficient air permeability, and smooth surface suitable for manufacturing various ceramic products such as tableware and insulators. The present invention has been completed in order to provide a porous plaster mold and a method for manufacturing the same, which can satisfy the following conditions: durable, easy to repair when damaged, etc.
（課題を解決するための手段）
本発明は、内部に多孔管が埋設された多孔質石
膏を型枠の内部に鋳込んだ多孔質石膏型であつ
て、多孔質石膏の多孔管より表面側の部分の連続
した通気孔の通気度を多孔管より型枠側の部分の
通気度よりも大としたことを特徴とする多孔質石
膏型に関する第１の発明と、芯材に形状を保持さ
せた多孔管を内型の外部に内型から所定間隔を保
持した状態でセツトし、型枠を被嵌設置した後、
型枠と内型との間〓部に石膏を鋳込み、この石膏
が半硬化状態にあるときに内型を離型し多孔管に
圧縮空気を導入継続して石膏内表面より水分を泡
出させながら石膏を硬化させ、主として多孔管よ
りも表面側の部分の水分泡出通路を連続した多孔
質通路として形成することを特徴とする多孔質石
膏型の製造方法に関する第２の発明とからなるも
のである。(Means for Solving the Problems) The present invention provides a porous gypsum mold in which porous gypsum with porous pipes embedded therein is cast inside a mold, and the surface side of the porous gypsum is closer to the surface than the porous pipes of the porous gypsum. A first invention relating to a porous plaster mold, characterized in that the air permeability of the continuous ventilation holes in the part of the mold is greater than the permeability of the part on the side of the mold from the porous pipe, and a core material that retains its shape. After setting the perforated pipe outside the inner mold with a predetermined distance from the inner mold, and fitting the mold into the mold,
Plaster is poured into the space between the mold and the inner mold, and when the plaster is in a semi-hardened state, the inner mold is released and compressed air is continuously introduced into the porous tube to bubble out water from the inner surface of the plaster. and a second invention relating to a method for producing a porous plaster mold, characterized in that the plaster is hardened and the moisture bubbling passages mainly on the surface side of the porous pipes are formed as continuous porous passages. It is.
（実施例）
次に本発明を図示の懸垂碍子製造用の石膏型の
実施例によつて更に詳細に説明する。(Example) Next, the present invention will be explained in more detail with reference to the illustrated example of a plaster mold for manufacturing a suspended insulator.
第１図において、１はアルミニウム等の金属か
らなる型枠、２はこの型枠１の内部に鋳込まれた
連続気孔を有する多孔質石膏であつて、その成形
表面３は本実施例では懸垂碍子の外表面形状に対
応する形状とされている。連続気孔を有する多孔
質石膏２としては高強度で大きい通気性を得るこ
とができる石膏が選択される。４はこの多孔質石
膏２の内部に成形表面３の形状に沿つて埋設され
た多孔管である。多孔管４としては例えばサイジ
ングチユーブと呼ばれるガラス繊維チユーブの使
用が好ましい。このような多孔管４は扇風機のガ
ードのような形状の好ましくは鉄製の芯材５の外
側あるいは内側にスパイラル状に巻付け固定され
ており、その基部はビニール管１０等に接続され
て型枠１の下端部中央圧縮空気の注入治具６内に
達して開口し固定されている。このようにして本
発明においては連続気孔を有する多孔質石膏２が
多孔管４によつて成形表面３側と型枠１側に２分
されるが、多孔質石膏２のうちの成形表面３側の
部分７の連続した通気孔の通気度が型枠１側の部
分８の通気度よりも大とされている。即ち、実施
例の場合には成形表面３側の部分７の通気度が60
±20mmAq程度が好ましいのに対し、型枠１側の
部分８の通気度は５mmAq以下である。このよう
な通気度の差の調整方法については後述する。な
お、９は型枠１の下端部付近の内側に埋設された
非通気性石膏である。この非通気性石膏９は型の
中央部からの空気の噴出を防止する。また１１は
注入治具６の外側に設けられた空気吹込みあるい
は吸引用のノズルである。 In FIG. 1, 1 is a mold made of metal such as aluminum, 2 is porous gypsum having continuous pores cast into the inside of this mold 1, and its molding surface 3 is suspended in this embodiment. The shape corresponds to the outer surface shape of the insulator. As the porous gypsum 2 having continuous pores, gypsum is selected because it has high strength and can provide high air permeability. Reference numeral 4 denotes a porous pipe embedded inside this porous plaster 2 along the shape of the molding surface 3. As the porous tube 4, it is preferable to use, for example, a glass fiber tube called a sizing tube. Such a porous pipe 4 is spirally wound and fixed on the outside or inside of a core material 5, preferably made of iron, shaped like a fan guard, and its base is connected to a vinyl pipe 10 or the like to form a mold. The lower end of the compressed air injection jig 6 is opened and fixed at the center of the compressed air injection jig 6. In this way, in the present invention, the porous plaster 2 having continuous pores is divided into two by the porous tube 4 into the molding surface 3 side and the molding surface 1 side, but the molding surface 3 side of the porous plaster 2 The air permeability of the continuous ventilation holes in the portion 7 is greater than that of the portion 8 on the formwork 1 side. That is, in the case of the example, the air permeability of the portion 7 on the side of the molding surface 3 is 60
While the air permeability of the portion 8 on the formwork 1 side is preferably about ±20 mmAq, it is 5 mmAq or less. A method for adjusting such a difference in air permeability will be described later. Note that 9 is non-porous plaster buried inside near the lower end of the formwork 1. This non-porous plaster 9 prevents air from escaping from the center of the mold. Further, 11 is a nozzle provided outside the injection jig 6 for blowing or suctioning air.
次にこのような多孔質石膏型の製造方法につい
て第３図に基づいて説明する。 Next, a method for manufacturing such a porous plaster mold will be explained based on FIG. 3.
先ず第２図に示すように、好ましくは鉄製の芯
材５の外側あるいは内側にガラス繊維製の円筒状
のサイジングチユーブよりなる多孔管４をスパイ
ラル状に巻付け固定することにより所定形状を保
持させた多孔管４を作成し、これを例えば懸垂碍
子の外表面に対応する内型１２の外表面から所定
寸法はなした位置に図示するとおり、スペーサー
１３上に載置して浮上がらせた状態でセツトす
る。なおこれに先立ち、石膏等よりなる内型１２
の外表面上には表面をより平滑とする樹脂等をコ
ーテイングし、その表面に石けん水のような離型
剤を塗布しておき、注型石膏の半硬化状態での内
型１２の離型性を良くするものとする。次に型の
外面形状を決める好ましくはアルミニウム製の型
枠１を内型１２および多孔管４の外側に図示する
如く被嵌し、セツトする。次に多孔管４の基部に
接続されたビニール管１０等の接続管の先端を引
き出して型枠１の注入治具６内に開口状態にセツ
トし、第３図に矢印で示すように注入治具６に沿
わせて予め準備した減圧脱気された通気性の石膏
２を型枠１と内型１２との間の間〓１４に気泡を
巻き込まないように静かに注入する。石膏２は多
孔管４がセツトされた空間内部を下方より順次埋
めて上昇し、石膏２の上面が注入治具６の近くま
で達したときに注入を止め、その上に石膏２とは
異なる非通気性石膏９を注入する。なお、この場
合サイジングチユーブよりなる多孔管４は注入石
膏２により押し潰されることはない。 First, as shown in FIG. 2, a perforated tube 4 made of a cylindrical sizing tube made of glass fiber is spirally wound and fixed around the outside or inside of a core material 5, preferably made of iron, to maintain a predetermined shape. A perforated tube 4 is prepared, and as shown in the figure, this is placed on a spacer 13 and floated at a position a predetermined distance from the outer surface of the inner mold 12 corresponding to the outer surface of the suspended insulator. Set it with . In addition, prior to this, an inner mold 12 made of plaster etc.
The outer surface of the inner mold 12 is coated with a resin or the like to make the surface smoother, and a mold release agent such as soapy water is applied to the surface. It is supposed to improve sex. Next, a mold frame 1, preferably made of aluminum, which determines the external shape of the mold, is fitted and set on the outside of the inner mold 12 and the perforated tube 4 as shown in the figure. Next, pull out the tip of the connecting pipe such as the vinyl pipe 10 connected to the base of the porous pipe 4, set it in the injection jig 6 of the formwork 1 in an open state, and move the injection jig as shown by the arrow in FIG. Air-permeable plaster 2 prepared in advance and deaerated under reduced pressure is gently injected along the tool 6 into the gap 14 between the mold 1 and the inner mold 12 so as not to entrain air bubbles. The plaster 2 gradually fills the space in which the porous pipe 4 is set from below and rises, and when the top surface of the plaster 2 reaches near the injection jig 6, the injection is stopped and a non-woven material different from the plaster 2 is placed on top of it. Inject breathable plaster 9. In this case, the porous tube 4 consisting of a sizing tube is not crushed by the injected plaster 2.
この状態で室温に静置すると石膏は次第に硬化
を開始するので、注入石膏が半硬化状態となつた
ときに内型１２を離型し、石膏が充填された型枠
１を反転して成形表面を上方にし、図示しない空
気圧送装置上にセツトし、該装置の圧縮空気送気
口（図示せず）をノズル１１に接続し、注入治具
６のノズル１１から多孔管４の内部に圧縮空気を
導入する。圧縮空気の導入は例えば0.5〜1.0Kg／
cm2で約10分間程度、次いで圧力を1.5〜2.0Kg／cm2
で５〜10分間程度、最後に圧力を2.5〜3.0Kg／cm2
に上昇する３段階に順次に圧力を高めつつ約30〜
40分間にわたつて行われる。このようにサイデン
グチユーブよりなる多孔管４の内側に導入された
圧縮空気は繊維状の多孔管４を通して半硬化状態
の石膏の内部に分散して表面（内面）側に噴出す
るが、多孔管４よりも型枠１の側は型枠１によつ
て密閉されているのに対し、成形表面３の側７は
開放されているため、空気の大部分が成形表面３
に向つて石膏の内部に流れ、成形表面３の滑らか
さを保つたまま成形表面３から内部の水分を伴つ
た気泡となつて泡出する。この泡出した水分をス
ポンジあるいは減圧吸引によつて除去する。そし
てこのときに、多孔管４よりも成形表面３側の部
分７の石膏により多くの連続した多孔質通路を形
成し、この部分７を反対側の部分８よりも大きい
通気度を持つた多孔質石膏２とする。圧縮空気を
連続的に送気し、石膏２中の水分泡出がほぼ終る
まで30〜40分間この操作を継続し、この間に注入
石膏を硬化させる。この送気中の石膏硬化に伴つ
て、水分泡出路が微細な連続した通気路として石
膏中に残留し、連続気孔を有する多孔質の石膏型
が形成される。その後に赤外線加熱あるいは加熱
炉中等により加熱して石膏の完全硬化を行わせれ
ば、第１の発明の多孔質石膏型が得られることと
なる。 If left at room temperature in this state, the plaster will gradually start to harden, so when the injected plaster is in a semi-hardened state, the inner mold 12 is released, the mold 1 filled with plaster is turned over, and the molded surface is upward, set it on an air pressure feeding device (not shown), connect the compressed air inlet (not shown) of the device to the nozzle 11, and supply compressed air from the nozzle 11 of the injection jig 6 to the inside of the porous pipe 4. will be introduced. For example, the introduction of compressed air is 0.5 to 1.0 kg/
cm 2 for about 10 minutes, then increase the pressure to 1.5-2.0Kg/cm 2
for about 5 to 10 minutes, and finally increase the pressure to 2.5 to 3.0 Kg/cm 2
Approximately 30 ~ while increasing the pressure sequentially in 3 stages rising to
It will be held for 40 minutes. The compressed air introduced into the inside of the perforated pipe 4 made of a lateral tube is dispersed inside the semi-hardened plaster through the fibrous perforated pipe 4 and ejected to the surface (inner surface) side. Since the side of the molding surface 3 is closed by the molding surface 1, the side 7 of the molding surface 3 is open, so that most of the air flows into the molding surface 3.
It flows into the inside of the plaster and bubbles out from the molding surface 3 with the moisture inside while maintaining the smoothness of the molding surface 3. This foamed water is removed using a sponge or vacuum suction. At this time, a large number of continuous porous passages are formed in the plaster in the portion 7 on the molding surface 3 side of the porous tube 4, and this portion 7 is made of porous material having a greater air permeability than the portion 8 on the opposite side. Let's call it plaster 2. Compressed air is continuously supplied and this operation is continued for 30 to 40 minutes until moisture bubbling in the plaster 2 is almost completed, during which time the injected plaster is cured. As the gypsum hardens during this air supply, moisture bubble exit channels remain in the gypsum as fine continuous ventilation channels, forming a porous gypsum mold having continuous pores. If the gypsum is then heated by infrared heating or a heating furnace to completely harden the gypsum, the porous gypsum mold of the first invention will be obtained.
（作用）
このように構成された本発明の多孔質石膏型
は、従来品と同様に詳記、碍子等の各種陶磁器製
品の成形型として用いられるもので、陶磁器製品
の成形の際にはノズル１１から空気を吸引して多
孔管４を通して多孔質石膏型の内表面部全体を減
圧にし、成形体を成形型表面３に密着させて正確
な形状に成形を行わせることができる。また成形
体の成形後はノズル１１から多孔管４を通じて多
孔質石膏型の内部に空気を吹込めば、石膏型の成
形表面３から空気が噴出して陶磁器製品の成形体
を強制的に本石膏型成形表面３から容易に離型さ
せることができる。しかも本発明によれば空気は
通気度の大きい表面３側の部分に集中的に噴出す
るので例えば、成形体の重量の重い碍子製造にも
十分な通気量が得られるうえ、通気量を低く抑え
たい碍子頭部付近には低通気量石膏を用いること
により型の中央部分の通気度を抑えて碍子頭部が
変形することを防止することもできる。(Function) The porous gypsum mold of the present invention configured as described above is used as a mold for various ceramic products such as insulators in the same way as conventional products. By suctioning air through the porous tube 4 and reducing the pressure on the entire inner surface of the porous plaster mold, the molded body can be brought into close contact with the mold surface 3 and molded into an accurate shape. After forming the molded product, if air is blown into the porous plaster mold from the nozzle 11 through the perforated pipe 4, the air will be ejected from the molding surface 3 of the plaster mold, forcing the molded ceramic product to be made of this gypsum mold. It can be easily released from the molding surface 3. Moreover, according to the present invention, air is ejected intensively to the portion on the surface 3 side where the air permeability is high, so that, for example, sufficient air flow can be obtained for manufacturing insulators with heavy molded bodies, and the air flow can be kept low. By using low air permeability gypsum near the insulator head, it is possible to suppress the air permeability in the central part of the mold and prevent the insulator head from deforming.
（発明の効果）
以上に説明したように、第１の発明の多孔質石
膏型は極めて安価な石膏により各種陶磁器製品の
製造に適する通気性と表面の滑らかさを持つた石
膏型であり、陶磁器製品成形時の石膏型内表面部
の減圧脱気により成形型に沿つた正確な成形体の
成形が可能で、しかも成形体の石膏型よりの離型
時の内部加圧によるエアーブロー離型により容易
に成形体を石膏型より離型することができる。ま
たこの多孔質石膏型は成形表面の一部が破損した
ような場合にも容易に修復することができるの
で、製作費のみならずメンテナンス費も安価なも
のである。(Effects of the Invention) As explained above, the porous gypsum mold of the first invention is a gypsum mold that is made of extremely inexpensive gypsum and has air permeability and a smooth surface suitable for manufacturing various ceramic products. During product molding, the inner surface of the plaster mold is depressurized and degassed, making it possible to mold the molded object accurately along the mold.Moreover, when the molded object is released from the plaster mold, it is possible to release the mold by air blowing using internal pressure. The molded body can be easily released from the plaster mold. Moreover, even if a part of the molding surface is damaged, this porous plaster mold can be easily repaired, so that not only manufacturing costs but also maintenance costs are low.
更に第２の発明によれば、上記したような第１
の発明の多孔質石膏型の通気量を任意に調節する
ことができる多孔質石膏型を容易に製造すること
ができる。 Furthermore, according to the second invention, the above-mentioned first
According to the invention, it is possible to easily produce a porous gypsum mold in which the amount of ventilation of the porous gypsum mold can be arbitrarily adjusted.
よつて本発明は従来の問題点を解決した各種陶
磁器製品成形のための多孔質石膏型及びその製造
方法として、産業の発展に寄与するところは極め
て大なものである。 Therefore, the present invention greatly contributes to the development of industry as a porous plaster mold for molding various ceramic products and a method for manufacturing the same, which solves the conventional problems.
第１図は第１の発明の多孔質石膏型の実施例を
示す断面図、第２図は芯材に形状を保持させた多
孔管を示す正面図、第３図は第２の発明を説明す
る断面説明図である。
１……型枠、２……多孔質石膏、３……表面、
４……多孔管、５……芯材、７……表面側の部
分、８……型枠側の部分、１２……内型。
Fig. 1 is a sectional view showing an embodiment of the porous plaster mold of the first invention, Fig. 2 is a front view showing a porous pipe whose shape is retained by the core material, and Fig. 3 explains the second invention. FIG. 1... Formwork, 2... Porous plaster, 3... Surface,
4... Porous pipe, 5... Core material, 7... Surface side part, 8... Formwork side part, 12... Inner mold.
Claims (1)
型枠１の内部に鋳込んだ多孔質石膏型であつて、
多孔質石膏２の多孔管４より表面３側の部分７の
連続した通気孔の通気度を多孔管４より型枠１側
の部分８の通気度よりも大としたことを特徴とす
る多孔質石膏型。 ２ 芯材５に形状を保持させた多孔管４を内型１
２の外部に内型１２から所定間隔を保持した状態
でセツトし、型枠１を被嵌設置した後、型枠１と
内型１２との間〓部に石膏を鋳込み、この石膏が
半硬化状態にあるときに内型１２を離型し多孔管
４に圧縮空気を導入継続して石膏内表面３より水
分を泡出させながら石膏を硬化させ、主として多
孔管４よりも表面３側の部分７の水分泡出通路を
連続した多孔質通路として形成することを特徴と
する多孔質石膏型の製造方法。[Claims] 1. A porous plaster mold in which a porous plaster 2 with a porous pipe 4 embedded therein is cast into a mold 1,
Porous plaster 2 characterized in that the air permeability of the continuous ventilation holes in the portion 7 on the side of the surface 3 from the porous tube 4 of the porous plaster 2 is greater than the air permeability of the portion 8 on the side of the formwork 1 from the porous tube 4. plaster mold. 2 Place the porous tube 4 whose shape is retained by the core material 5 into the inner mold 1.
After the mold 1 is set on the outside of the mold 2 at a predetermined distance from the inner mold 12, and the mold 1 is fitted, plaster is cast into the space between the mold 1 and the inner mold 12, and this plaster is semi-hardened. In this condition, the inner mold 12 is released and compressed air is continuously introduced into the porous tube 4 to harden the plaster while bubbling water from the inner surface 3 of the plaster, mainly in the area closer to the surface 3 than the porous tube 4. A method for producing a porous plaster mold, characterized in that the water bubbling passages in step 7 are formed as continuous porous passages.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158554A JPH0323903A (en) | 1989-06-21 | 1989-06-21 | Porous gypsum mold and manufacture thereof |
| CN90103031A CN1048673A (en) | 1989-06-21 | 1990-06-21 | Graphite mould and manufacture method thereof |
| KR1019900009211A KR910000310A (en) | 1989-06-21 | 1990-06-21 | Porous gypsum mold and its manufacturing method |
| US08/167,028 US5451152A (en) | 1989-06-21 | 1993-12-16 | Porous mold for manufacturing ceramics |
| US08/452,286 US5556587A (en) | 1989-06-21 | 1995-05-26 | Method of manufacturing ceramics using a porous mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158554A JPH0323903A (en) | 1989-06-21 | 1989-06-21 | Porous gypsum mold and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0323903A JPH0323903A (en) | 1991-01-31 |
| JPH0476762B2 true JPH0476762B2 (en) | 1992-12-04 |
Family
ID=15674245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1158554A Granted JPH0323903A (en) | 1989-06-21 | 1989-06-21 | Porous gypsum mold and manufacture thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0323903A (en) |
| KR (1) | KR910000310A (en) |
| CN (1) | CN1048673A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRE20010022A1 (en) * | 2001-03-09 | 2002-09-09 | Sacmi | MOLD ELEMENT FOR THE FORMING OF OBJECTS BY MELTING WITH A CLAY HUMID DOUGH AND SIMILAR AND METHOD FOR ITS MANUFACTURE |
| US8306277B2 (en) | 2005-07-27 | 2012-11-06 | Canon Kabushiki Kaisha | Image processing apparatus and image processing method, and computer program for causing computer to execute control method of image processing apparatus |
| JP6123124B2 (en) * | 2013-03-27 | 2017-05-10 | 日本碍子株式会社 | Suspended insulator mold |
| JP6106885B2 (en) * | 2014-03-20 | 2017-04-05 | 日本碍子株式会社 | Suspended insulator mold |
| CN108022702B (en) * | 2017-12-13 | 2019-04-30 | 江西高强电瓷集团有限公司 | The glass insulator mold of included cooling mechanism |
| CN108724441A (en) * | 2018-05-29 | 2018-11-02 | 浙江泰华集成家居科技有限公司 | The open type shaping mould of gypsum lampshade |
-
1989
- 1989-06-21 JP JP1158554A patent/JPH0323903A/en active Granted
-
1990
- 1990-06-21 CN CN90103031A patent/CN1048673A/en not_active Withdrawn
- 1990-06-21 KR KR1019900009211A patent/KR910000310A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0323903A (en) | 1991-01-31 |
| KR910000310A (en) | 1991-01-29 |
| CN1048673A (en) | 1991-01-23 |
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