JPH0410005Y2 - - Google Patents
Info
- Publication number
- JPH0410005Y2 JPH0410005Y2 JP14194087U JP14194087U JPH0410005Y2 JP H0410005 Y2 JPH0410005 Y2 JP H0410005Y2 JP 14194087 U JP14194087 U JP 14194087U JP 14194087 U JP14194087 U JP 14194087U JP H0410005 Y2 JPH0410005 Y2 JP H0410005Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- mold
- core material
- cylindrical elastic
- absorbing
- 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
- 239000011162 core material Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 20
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 description 11
- 239000002250 absorbent Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、内面に凹凸のある焼成セラミツク製
品の素地成形用中子を容易に鋳込成形できる焼成
セラミツク製品の素地成形用中子に関するもので
ある。[Detailed description of the invention] (Field of industrial application) The present invention relates to a core for forming a base of fired ceramic products that can be easily cast and molded with an uneven inner surface. It is.
（従来の技術）
複雑な形状のセラミツク製品の素地を鋳込成形
するに際し、弾性材よりなる中子を使用すること
はすでに知られている。（例えば、特開昭61−
125804号公報）
（考案が解決しようとする問題点）
ところが、前記公報に記載の発明に使用される
弾性材よりなる中子は、溶剤で簡単に溶解される
有機材料よりなる芯材の表面に該溶剤に不溶な被
覆膜をコーテイングしたものであるため、芯材の
溶出を手数を要するうえに溶剤の使用は公害を招
くおそれがある。(Prior Art) It is already known to use a core made of an elastic material when casting a ceramic product base having a complicated shape. (For example, JP-A-61-
(Publication No. 125804) (Problem to be solved by the invention) However, the core made of an elastic material used in the invention described in the above publication does not adhere to the surface of the core made of an organic material that is easily dissolved in a solvent. Since it is coated with a coating film that is insoluble in the solvent, it is troublesome to elute the core material, and the use of a solvent may cause pollution.
（問題点を解決するための手段）
本考案は前記のような問題点を解決した焼成セ
ラミツク製品の素地成形用中子に関するもので、
吸水性芯材の外周面に表面が凹凸型面に形成され
た筒状弾性型材を装脱自在に囲装したことを特徴
とするものである。(Means for solving the problems) The present invention relates to a core for molding a fired ceramic product, which solves the above-mentioned problems.
It is characterized in that a cylindrical elastic material having an uneven surface is removably enclosed on the outer peripheral surface of the water-absorbing core material.
（作用）
このような焼成セラミツク製品の素地成形用中
子は、石こう型や減圧鋳込型などの鋳込型内に吸
水性芯材の下端面が鋳込型の型底面に接するよう
にセツトして相互間に形成されるキヤビテイにセ
ラミツク泥漿を鋳込み、含有水分を鋳型の型面を
通じ吸収してキヤビテイ内の泥漿を脱水硬化させ
て素地を成形する。そして、素地が脱型可能な程
度に硬化したら、筒状弾性型材が外周面に装脱自
在に囲装されている吸水性芯材を該筒状弾性型材
が鋳込型内に残されるようにして引き出して、該
筒状弾性型材の弾力性を増大させ、次いで、鋳込
型内において素地内面に付着している筒状弾性部
材をその弾力性を利用して外し、後は型から常法
により脱型すればよい。(Function) The core for forming the base material of such fired ceramic products is set in a casting mold such as a plaster mold or a vacuum casting mold so that the lower end surface of the water-absorbing core material is in contact with the bottom surface of the casting mold. Ceramic slurry is then cast into the cavity formed between the molds, and the moisture contained therein is absorbed through the surface of the mold to dehydrate and harden the slurry in the cavity to form a base material. When the base material has hardened to the extent that it can be removed from the mold, the water-absorbing core material, in which the cylindrical elastic material is removably surrounded on the outer circumferential surface, is removed so that the cylindrical elastic material remains in the casting mold. The elasticity of the cylindrical elastic material is increased by pulling it out, and then the elasticity is used to remove the cylindrical elastic member attached to the inner surface of the material in the casting mold, and the rest is removed from the mold in the usual manner. The mold can be removed by
（実施例）
次に、本考案を第３図に示すような２本の環状
突起が短筒体の内面に形成された窒化ケイ素系セ
ラミツク焼成部品の素地成形を実施例として詳細
に説明すれば、１は下端径が上端径より僅かに小
さい石膏或いはケイ酸カルシウムなどの保形性に
優れた吸水性材よりなる短柱状の吸水性芯材であ
つて、その外周面には表面が凹凸型面２に形成さ
れた筒状弾性型材３が装脱自在に囲装されてい
る。筒状弾性型材３はその内径が前記吸水性芯材
１と対応するよう下端に比べて上端を大径として
いるが外径は上下共略等径であり、また、本実施
例における凹凸型面２は断面形状を略半円形とす
る環状凹溝４を上下に２本配設することにより形
成してあり、また、筒状弾性型材３の材質はシリ
コーンゴムやウレタンゴムなどが用いられる。そ
して、吸水性芯材１に対し筒状弾性型材３は該吸
水性芯材１の両端面が露呈されるように装脱自在
に囲装されて本考案に係る焼成セラミツク製品の
素地成形用中子を構成している。(Example) Next, the present invention will be explained in detail by using as an example the base molding of a fired silicon nitride ceramic part in which two annular protrusions are formed on the inner surface of a short cylinder as shown in Fig. 3. , 1 is a short column-shaped water-absorbing core material made of a water-absorbing material with excellent shape retention, such as gypsum or calcium silicate, whose lower end diameter is slightly smaller than the upper end diameter, and its outer peripheral surface has an uneven surface. A cylindrical elastic section 3 formed on the surface 2 is removably enclosed. The cylindrical elastic section 3 has a larger diameter at its upper end than at its lower end so that its inner diameter corresponds to the water-absorbing core material 1, but its outer diameter is approximately the same on both the upper and lower ends. 2 is formed by arranging two upper and lower annular grooves 4 each having a substantially semicircular cross-sectional shape, and the material of the cylindrical elastic member 3 is silicone rubber, urethane rubber, or the like. The cylindrical elastic mold material 3 is removably enclosed with respect to the water-absorbent core material 1 so that both end surfaces of the water-absorbent core material 1 are exposed, and the cylindrical elastic shape material 3 is enclosed in a removable manner so that both end surfaces of the water-absorbent core material 1 are exposed. constitutes a child.
このように構成されたものは、予め吸水性芯材
１を含水状態として第２図に示すように、底型１
１と枠型１２とよりなる鋳込型１３内に吸水性芯
材１の下端面が底型１１と密接するよう該底型１
１の中子受部１４に下端をもつて嵌合支持させて
おき、鋳込型１３の内面と保形性に優れた吸水性
芯材１を囲装している筒状弾性型材３の凹凸型面
２との間に形成されるキヤビテイ１５に例えば窒
化ケイ素粉を主材としてこれに焼結助剤および原
料粉末100グラムに対し水27グラムを加え、さら
に粘結剤、解こう剤の各適量を添加してなる窒化
ケイ素泥漿を鋳込む。そして、前記した吸水性芯
材１の保形下において泥漿の含有水分が鋳込型１
３に吸収されて脱水硬化したら、吸水性芯材１を
上方へ引き出せば、吸水性芯材１は予め含水され
ているうえに下端面が底型１１と密接されている
ことによつて鋳込型１３の吸収した水分の一部を
も吸収して、ほぼ飽水状態となつていることによ
り、この水が該吸水性芯材１の周面と筒状弾性型
材３との界面で潤滑材として作用し、吸水性芯材
１のみが容易に抜き出されるから、筒状弾性型材
３は中空となつて弾力性が一層高められる。そこ
で凹凸型面２が素地内面に食い込んでいる筒状弾
性型材３をその優れた弾力性を利用して外し、残
された素地を鋳込型１３から常法により脱型すれ
ばよい。そして、この脱型した窒化ケイ素生素地
は室内乾燥後100℃にて加熱乾燥し、得られた乾
燥素地を窒素雰囲気焼結炉において1830℃で３時
間焼成すれば、内周面に断面形状を略半円形とす
る上下に２本の環状突起部を有する窒化ケイ素焼
結体が得られる。なお、前記説明はキヤビテイ部
１５に鋳込まれた泥漿が硬化したら先ず吸水性芯
材１を引き抜いているが、鋳込型１３の底型１１
を外して下方より吸水性芯材１を突き出すように
してもよい。 With this structure, as shown in FIG.
The bottom mold 1 is placed in a casting mold 13 consisting of a mold 1 and a frame 12 so that the lower end surface of the water absorbent core material 1 is in close contact with the bottom mold 11.
The unevenness of the cylindrical elastic shape material 3 that is fitted and supported by the core receiving part 14 of 1 with its lower end and surrounds the inner surface of the casting mold 13 and the water-absorbing core material 1 with excellent shape retention properties. For example, silicon nitride powder is the main material, and 27 grams of water is added to the cavity 15 formed between the mold surface 2 and sintering aid and 100 grams of raw material powder, and each of a binder and a peptizer is added. Cast silicon nitride slurry made by adding an appropriate amount. Then, under the shape retention of the water-absorbing core material 1 described above, the moisture contained in the slurry is absorbed into the casting mold 1.
When the water-absorbent core material 1 is absorbed by the water-absorbent core material 3 and hardened by dehydration, the water-absorbent core material 1 is preliminarily hydrated and its lower end surface is in close contact with the bottom mold 11. Since the mold 13 also absorbs a part of the water absorbed and becomes almost saturated with water, this water acts as a lubricant at the interface between the circumferential surface of the water-absorbing core material 1 and the cylindrical elastic mold material 3. Since only the water absorbent core material 1 is easily extracted, the cylindrical elastic shape material 3 becomes hollow and its elasticity is further enhanced. Therefore, the cylindrical elastic mold material 3 whose uneven surface 2 is biting into the inner surface of the base material is removed by utilizing its excellent elasticity, and the remaining material is removed from the casting mold 13 by a conventional method. This demolded silicon nitride green material is dried indoors and then heated to 100°C, and the resulting dry material is fired in a nitrogen atmosphere sintering furnace at 1830°C for 3 hours to create a cross-sectional shape on the inner peripheral surface. A silicon nitride sintered body having a substantially semicircular shape and two annular protrusions on the upper and lower sides is obtained. In the above description, the water-absorbent core material 1 is first pulled out after the slurry cast into the cavity 15 hardens, but the bottom mold 11 of the casting mold 13 is
Alternatively, the water absorbent core material 1 may be removed from below and protruded from below.
（考案の効果）
本考案は前記説明から明らかなように、吸水性
と保形性に優れた石膏などの吸水性芯材と、シリ
コーンゴムやウレタンゴムなどの弾性材よりなる
筒状弾性型材を巧妙に利用して複雑な形状の焼成
セラミツク製品の素地を容易に鋳込成形できるよ
うにしたもので、吸水性芯材は保形性があつて全
体を弾性材で成形した中子や中空の弾性筒体内に
空気を充満させたものに比べて精密度が高く、ま
た、吸収した水が潤滑剤として作用するので特別
な離型剤を用いることなく筒状弾性型材から容易
に抜け出すことができて作業が簡単なうえコスト
も安く、しかも、芯材を溶剤で溶出する場合のよ
うに公害発生のおそれもない等多くの利点があ
り、従来のこの種焼成セラミツク製品の素地成形
用中子の問題点を解決したものとして実用的価値
極めて大なものである。(Effects of the invention) As is clear from the above description, the present invention uses a cylindrical elastic shape material made of a water-absorbing core material such as gypsum that has excellent water absorption and shape retention, and an elastic material such as silicone rubber or urethane rubber. It is cleverly utilized to make it possible to easily cast and mold the base of fired ceramic products with complex shapes. It has higher precision than an elastic cylinder filled with air, and since the absorbed water acts as a lubricant, it can be easily released from the cylindrical elastic mold material without using a special mold release agent. It has many advantages, such as being easy to work with and being inexpensive, and there is no risk of pollution as would be the case when the core material is leached out with a solvent. It has great practical value as it solves a problem.
第１図は本考案の実施例を示す一部切欠正面
図、第２図は使用状態において示す一部切欠正面
図、第３図は本考案を用いて鋳込成形した素地体
の一部切欠正面図である。
１……吸水性芯材、２……凹凸型面、３……筒
状弾性型材。
Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway front view showing it in use, and Fig. 3 is a partially cutaway front view of a base body cast using the present invention. It is a front view. 1... Water-absorbing core material, 2... Concave-convex shaped surface, 3... Cylindrical elastic profile material.
Claims (1)
れた筒状弾性型材を装脱自在に囲装したことを特
徴とする焼成セラミツク製品の素地成形用中子。 A core for forming a base material of fired ceramic products, characterized in that a cylindrical elastic material having an uneven surface is removably enclosed on the outer peripheral surface of a water-absorbing core material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14194087U JPH0410005Y2 (en) | 1987-09-17 | 1987-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14194087U JPH0410005Y2 (en) | 1987-09-17 | 1987-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446206U JPS6446206U (en) | 1989-03-22 |
| JPH0410005Y2 true JPH0410005Y2 (en) | 1992-03-12 |
Family
ID=31407454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14194087U Expired JPH0410005Y2 (en) | 1987-09-17 | 1987-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410005Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2699519B2 (en) * | 1989-02-14 | 1998-01-19 | 石川島播磨重工業株式会社 | Cast molding method |
-
1987
- 1987-09-17 JP JP14194087U patent/JPH0410005Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6446206U (en) | 1989-03-22 |
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