JPH01294004A - Molding of original body for sintering - Google Patents
Molding of original body for sinteringInfo
- Publication number
- JPH01294004A JPH01294004A JP12436788A JP12436788A JPH01294004A JP H01294004 A JPH01294004 A JP H01294004A JP 12436788 A JP12436788 A JP 12436788A JP 12436788 A JP12436788 A JP 12436788A JP H01294004 A JPH01294004 A JP H01294004A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- shielding member
- raw material
- molding
- original
- 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.)
- Granted
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 56
- 238000000465 moulding Methods 0.000 title claims description 33
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 8
- 239000011236 particulate material Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052863 mullite Inorganic materials 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 3
- 230000001804 emulsifying effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000843 powder Substances 0.000 description 5
- 230000006837 decompression Effects 0.000 description 4
- 239000010954 inorganic particle Substances 0.000 description 4
- 239000013618 particulate matter Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 206010042674 Swelling Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000010111 plaster casting Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は粉粒体スラリーを型に鋳込んで複雑な形状の焼
結用原形体を成形する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of casting a powder slurry into a mold to form a complex-shaped sintering original body.
（従来の技術）
従来例えばセラミックス粉末から複雑形状の焼結用原形
体を成形する方法の一つに泥しよう鋳込み法があり石膏
が広く用いられている。(Prior Art) One of the conventional methods for molding a complex-shaped sintering prototype from ceramic powder is the plaster casting method, and gypsum is widely used.
しかし従来多（用いられている石膏型では複雑形状の物
は、雛型が４ｇであると共に耐久性がない等の問題が生
じていた。このため本出願人は特開昭６２−２６＋’１
６０３号公報に開示するように焼結用原形体の特殊な成
形方法を開発した。However, the plaster molds that have been used in the past have had problems such as the mold weighing only 4g for complex shapes and lack of durability.
As disclosed in Japanese Patent Application No. 603, a special method for forming a sintering prototype was developed.
（従来技術の問題点）
特開昭６２−２６８６０３号公報に開示されている焼結
用原形体の成形は原形部材の成形面に遮蔽部材を密着し
その上に造型枠体を滅せ、造型枠体内に珪砂等の粒状物
から成る充填材を充填し、造型枠体の上面を密閉して造
型枠体内を負圧にしもって充填材を真空バック状にして
半割型を造型し、この半割型を２つ型合せして画成した
キャビティにスラリーを注入するようにしている。(Problems with the prior art) The molding of the sintering prototype disclosed in JP-A No. 62-268603 involves placing a shielding member in close contact with the molding surface of the original member, placing a molding frame on top of the shielding member, and then molding. The frame is filled with a filler made of granular materials such as silica sand, the upper surface of the molding frame is sealed, and negative pressure is created inside the molding frame to create a vacuum bag shape for the filler to form a half mold. Slurry is injected into a cavity defined by fitting two split molds together.
しかしながら上記の方法によって成形された焼結用原形
体には次のような問題があった。すなわち焼結用原形体
を焼結する工程において、焼結用原形体の周囲に付着残
存した珪砂などの粒子状物から成る充填材が焼結用原形
体と反応をし焼結用原形体に不純物として混入すること
によって焼結体の品質、表面性状が悪くなる等の問題を
生じていた。However, the sintering original molded by the above method had the following problems. In other words, in the process of sintering the sintering prototype, the filler made of particulate matter such as silica sand that remains attached around the sintering prototype reacts with the sintering prototype to form the sintering prototype. Contamination as an impurity causes problems such as deterioration of the quality and surface properties of the sintered body.
（発明の目的）
本発明はこれらの開方を解決する目的のもとになされた
ものであり、焼結時に不純物を混入させることのない焼
結用原形体を成形する方法を提供することである。(Objective of the Invention) The present invention has been made with the aim of solving these problems, and by providing a method for forming a preform for sintering without introducing impurities during sintering. be.
ｃ問題点を解決するための手段）
本発明は原形模型板の表面にスラリー溶媒により溶解可
能な遮蔽部材あるいはスラリー溶媒が浸透可能な遮蔽部
材を密着し、該密着した遮蔽部材上に造型枠体を載置す
ると共に該造型枠体内に有機・粒９ポ吻知覧イだ影鴫充
填材を充填し、該充填材の上面を密閉して造型枠体内を
負圧にし、もって前記遮蔽部材を充填材側に吸着し、つ
いで前記原形模型板を遮蔽部材から離型して造型面を有
する半割型を造型し、２５半割型と同様にして造型した
もう一つの半割型と型合せしてキャビティを形成し、該
キャビティ内に焼結用原料に溶媒を加えて成る焼結用原
料スラリーを注入し、しかる後前記造型枠体内の負圧状
態を解除して半割型を崩壊し、もって焼結用原形体を取
り出す焼結用原形体の成形方法において、前記充填材が
前記焼結用原料の融点以上の瀬点を有する無機粒子状物
であることを特徴とするものである。c) Means for Solving Problems) The present invention provides a method in which a shielding member that can be dissolved by a slurry solvent or a shielding member that can be penetrated by a slurry solvent is closely attached to the surface of an original model plate, and a molding frame is placed on the tightly attached shielding member. At the same time, the molding frame is filled with an organic granular filler, and the upper surface of the filler is sealed to create a negative pressure inside the molding frame, thereby filling the shielding member. Then, the original model plate was released from the shielding member to form a half mold having a molding surface, and the mold was matched with another half mold formed in the same manner as the 25 half mold. to form a cavity, inject a sintering raw material slurry made by adding a solvent to the sintering raw material into the cavity, and then release the negative pressure inside the molding frame to collapse the half mold, The method for forming a sintering original body in which the sintering original body is taken out is characterized in that the filler is an inorganic particulate material having a melting point higher than the melting point of the sintering raw material.
（実施例） 以下本発明の実施例を図面に基づき説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図には原形模型板（１）が示されていて、該原形模
型板Ｃ１）は、内部に中空室（２）をＪＲ成した基台（
３）の上部に原形模型（４）を取付け、前記基台（８）
及び原形模型（４）には中空室（２）に連通した複数の
通気孔（６）が穿設されていると共に該中空室（２）は
ホース（７）及び切替弁（８）を介して図示されない吸
引装置に連通接続されている。FIG. 1 shows an original model board (1), and the original model board C1) is a base (1) with a hollow chamber (2) formed inside.
3) Attach the original model (4) to the top of the base (8).
A plurality of ventilation holes (6) communicating with the hollow chamber (2) are bored in the original model (4), and the hollow chamber (2) is connected to the hollow chamber (2) through a hose (7) and a switching valve (8). It is communicatively connected to a suction device (not shown).
次に第２図には遮蔽部材（９）に伸展性を与えるために
遮蔽部材（９）を加湿膨潤処理する状態が示されている
。すなわち受皿状の容器（ｌＯ）に多孔質材（昭和電Ｉ
Ｃ株）製ＡＬ １３ ＰＣ１粒径８０μ）に水を均一に
３〜５重量％加えて混合した多孔質加湿材料（ｌｌ）を
約２ｍ層状に均一に敷き次に厚さ３０μの水溶性ポリビ
ニルアルコールフィルムかろ成る遮蔽部材Ｃ９）をフィ
ルム保持枠（１２）に吸着保持させて前記多孔質加湿材
料（１１）の上に載置する。尚前記フィルム保持枠（１
２）は壁内部が中空室（１３）に構成され底板部に該中
空室に連通ずる吸引孔（１４）が穿設されていると共に
該中空室（１３）はホース（１５）及び切替弁（１６）
を介して図示されない吸引装置に連通接続されている。Next, FIG. 2 shows a state in which the shielding member (9) is subjected to humidification and swelling treatment in order to impart extensibility to the shielding member (9). In other words, a porous material (Showa Den I
A porous humidifying material (11) made by adding 3 to 5% by weight of water uniformly to AL 13 PC1 (particle size 80 μ) manufactured by C Co., Ltd. was spread uniformly in a layer of approximately 2 m, and then water-soluble polyvinyl alcohol with a thickness of 30 μ was spread. A shielding member C9) made of a film is adsorbed and held by the film holding frame (12) and placed on the porous humidifying material (11). Note that the film holding frame (1
2) has a hollow chamber (13) inside the wall, a suction hole (14) that communicates with the hollow chamber in the bottom plate, and a hose (15) and a switching valve ( 16)
It is communicatively connected to a suction device (not shown) via.
このような保持枠（１２）は、中空室（Ｉ３）と図示さ
れない吸引装置とを連通して保持枠ｒ１２）の下面に吸
引作用をはたらかせた状態で前記遮蔽部材（９）の上面
に押しつけて遮蔽部材（９）を吸着保持し、前記多孔質
加湿材料（１１）上に載置するのである。Such a holding frame (12) is pressed against the upper surface of the shielding member (9) while communicating the hollow chamber (I3) with a suction device (not shown) and exerting a suction action on the lower surface of the holding frame r12). The shielding member (9) is held by suction and placed on the porous humidifying material (11).
次に該遮蔽部材（９）の上部に前記多孔質加湿材料（１
１）と同じものを約１鐸層状にｔ−に敷いて第２図の状
態となる。この状態で約３分間静止させて遮蔽部材（９
）を均一に加湿する。その後前記遮蔽部材（９）上の多
孔質加湿材料（ｌｌ）を除去し、フィルム保持枠Ｃｌ２
）を上昇させることにより膨潤した遮蔽部材（９）が得
られた。Next, the porous humidifying material (1) is placed on the upper part of the shielding member (9).
Lay the same material as in 1) in a t- layer in about 1 layer to form the condition shown in Figure 2. Leave the shielding member (9) still in this state for about 3 minutes.
) to evenly humidify. After that, the porous humidifying material (ll) on the shielding member (9) is removed, and the film holding frame Cl2
), a swollen shielding member (9) was obtained.
尚実施例では遮蔽部材（９’）に伸展性を与えるために
遮蔽部材（９）を加湿して膨潤させろ方法を採用したが
遮蔽部材（９）を加熱して伸展性を与えることも可能で
ある。In the embodiment, a method was adopted in which the shielding member (9) was humidified and swollen in order to impart extensibility to the shielding member (9'), but it is also possible to heat the shielding member (9) to impart extensibility. be.
次に前記原形模型板（１）の中空室（２）と図示されな
い吸引装置とを連通して原形模型板（１）表面に吸引作
用をはたらかせながら前記膨潤した遮蔽部材（９）をフ
ィルム保持枠（Ｉ２）と共に原形模型板（１）表面に載
置する。これにより遮蔽部材（９）は、原形模型板（１
’）側からの吸引作用を受けて伸展されながら原形模型
（４）にそって吸引密着される。Next, the hollow chamber (2) of the original model plate (1) is communicated with a suction device (not shown), and the swollen shielding member (9) is moved to the film holding frame while applying a suction action to the surface of the original model plate (1). (I2) and placed on the surface of the original model plate (1). As a result, the shielding member (9) is attached to the original model plate (1
') While being stretched by the suction action from the side, it is brought into close contact with the original model (4) by suction.
その後保持枠Ｃｌ２）の吸引作用を遮断して保持枠（１
２）を原形模型板（１）上から除去すると共に該遮蔽部
材（９）の上面に塗型層（１７）を形成する。After that, the suction action of the holding frame Cl2) is cut off, and the holding frame (1
2) is removed from the original model plate (1) and a coating layer (17) is formed on the upper surface of the shielding member (9).
尚塗型層（１７）は多孔質材である妾″ミクロンの珪蕩
土を主体とし、これに黒鉛と溶媒としてのエチルアルコ
ールを加えて成る塗型剤を塗布して形成した。The mold layer (17) was formed by coating a mold layer (17) mainly made of micron diatomaceous earth, which is a porous material, with a mold agent made by adding graphite and ethyl alcohol as a solvent.
次に原形模型板（１）の上部に造型枠体（１８）を載置
し造型枠体（１８）と原形模型板（１）とで画成する中
空部に後述する焼結用原料と同じ融点である平均粒径７
５μの酸化アルミニウム粗粒（昭和電工０株）製Ａ−１
２Ｃ）から成る無機粒子状物の充填材（１９）を充填し
、パイブレーク−によって原形模型板（１）及び造型枠
体（１８）を一体内に振動させ無機粒子状物から成る充
填材（１９）の充填密度を高めろ。Next, a molding frame (18) is placed on top of the original model board (1), and the same material as the sintering material described later is placed in the hollow space defined by the molding frame (18) and the original model board (1). The average particle size, which is the melting point, is 7.
5μ aluminum oxide coarse grains (Showa Denko 0 Ltd.) A-1
The filling material (19) made of inorganic particulate matter (2C) is filled, and the original model board (1) and the molding frame (18) are vibrated as one body by pie-breaking. 19) Increase the packing density.
なお、前記造型枠体（１８）は本体部に環状の減圧室（
２０）が構成されていて、該減圧室（２０）はホース（
２１）及び切替弁（２２）を介して図示されない吸引装
置に連通接続されている。The molding frame (18) has an annular decompression chamber (
20), and the reduced pressure chamber (20) is connected to a hose (
21) and a switching valve (22) to a suction device (not shown).
また、造型枠体（１８）の本体部内側壁には減圧室（２
０）に連通ずる多数の通気孔（２３）が穿設されており
、該本体部の内側壁表面には前記充填材（１９７の通過
を阻止する細目を有するフィルター（２４）が取付けら
れている。In addition, a decompression chamber (2
A large number of ventilation holes (23) communicating with 0) are bored, and a filter (24) having fine holes for blocking the passage of the filler (197) is attached to the inner wall surface of the main body. .
この状態で前記減圧室（２０）と図示されない吸引装置
とを連通ずると共に造型枠体（１８）の上面に非通気性
シート（２５）を載置して第３図の状態となる。In this state, the decompression chamber (20) and a suction device (not shown) are communicated with each other, and an air-impermeable sheet (25) is placed on the upper surface of the molding frame (18), resulting in the state shown in FIG. 3.
この操作により充填材（１９）は造型枠体（１８）の減
圧室（２０）側からの吸引作用によりシート（２５）を
介して外圧を受は真空固化状態にされろ。この状態で原
形模型板（１）の中空室（２）と図示されない吸引装置
との連通を遮断し、造型枠体（１８）を原形模型板（１
）から引き離すと塗型層（１７）を形成した遮蔽部材（
９）は充填材（１９）側に吸着された状態になって型抜
きが行われ、焼結用原料スラリー注入用の半割型が得ら
れる。Through this operation, the filler (19) receives external pressure via the sheet (25) due to the suction action from the decompression chamber (20) side of the molding frame (18), and is brought into a vacuum solidified state. In this state, the communication between the hollow chamber (2) of the original model plate (1) and the suction device (not shown) is cut off, and the molding frame (18) is moved to the original model plate (1).
), the shielding member (
9) is adsorbed to the filler (19) side and then cut out of the mold to obtain a half-split mold for injecting raw material slurry for sintering.
上記の操作と同じ操作により別の半割型を造型して２つ
の半割型を型合わせすると共に焼結用原料スラ！Ｊ−（
２６）の貯槽（２７）の底部に連通ずる注入筒（２８）
を焼結用原料スラリー流し入れ口（２９）に連通し、第
４図の状態にする。By the same operation as above, another half mold is formed, the two half molds are matched, and the raw material for sintering is slurried! J-(
An injection cylinder (28) that communicates with the bottom of the storage tank (27) of 26)
is communicated with the sintering raw material slurry inlet (29) to bring it into the state shown in FIG.
なお前記焼結用原料スラ１７− （２６”）は実施例に
おいては直径Ｑ、５ｕｍの酸化アルミニウム粉末（昭和
電工０株）製ＡＬ−１６０３Ｇ”１ｌＯＯ部に対してポ
リビニルアルコール及びワックスをエマルジ３ン化した
バインダー１．０部（有機固形分として）及び溶媒とし
て水２０部を配合したものを用いた。この状態でゲート
（３０）を開いて焼結用原料スラリー（２６）をキャビ
ティ（３１）内に注入する。このようにして注入された
焼結用原料スラＩＪ−（２６）の水分は水溶性の遮蔽部
材（９）を一部残して溶解浸透し、更に塗型層（１７）
及び、１ｊｊＥ５粒子状物から成る充填材Ｃ１９）側に
吸引され、その結果キャビティ（３１）内には骨材より
成る焼結用原形体（３２）ができる。このような状態で
所定時間保持して、骨材より成る焼結用原形体（３２）
を！Ｗばらしをしても形状保持ができる状態になるまで
固化させろ。In the example, the sintering raw material slurry 17- (26") was prepared by emulsifying polyvinyl alcohol and wax to AL-1603G"1100 part of aluminum oxide powder (Showa Denko 0 Co., Ltd.) with diameter Q and 5 um. A mixture of 1.0 part of a converted binder (as organic solid content) and 20 parts of water as a solvent was used. In this state, the gate (30) is opened and the sintering raw material slurry (26) is injected into the cavity (31). The water in the sintering raw material slurry IJ-(26) injected in this way dissolves and permeates leaving a part of the water-soluble shielding member (9), and further forms the mold layer (17).
Then, it is sucked toward the filler C19) made of 1jjE5 particles, and as a result, a sintering original body (32) made of aggregate is formed in the cavity (31). By maintaining this state for a predetermined period of time, the sintering original body made of aggregate (32) is produced.
of! Let it solidify until it can maintain its shape even if it is separated.
次に上下に合わされた造型枠体（１８）（１８）の減圧
室（２０）と図示されない吸引装置との連通を遮断し造
型枠体（１８）内の減圧＃Ｒ態を解除すると共に上方の
シート（２５）を取り除いた後上方の造型枠体（１８）
を除去する。Next, communication between the vacuum chambers (20) of the vertically aligned molding frames (18) (18) and a suction device (not shown) is cut off, and the vacuum #R condition in the molding frames (18) is released, and the upper Upper molding frame body (18) after removing the sheet (25)
remove.
この操作により上部の半割型を構成していた無機粒子状
物から成る充填材（１９）が崩壊される。この状態でエ
ヤーブローにより充填材（１９）を排除して前記固化し
た焼結用原形体（３２）及び一部残った遮蔽部材（９）
並びに水分を吸着した塗型層（１７）、無機粒子状物か
ら成る充填材（１９）の水分凝猫層（３３）を一体状に
して取り出し第５図の状態になる。This operation collapses the filler (19) made of inorganic particles that constituted the upper half mold. In this state, the filler (19) is removed by air blowing, and the solidified sintering original body (32) and a portion of the shielding member (9) remain.
The mold layer (17) that has absorbed water and the water condensation layer (33) of the filler (19) made of inorganic particles are taken out as one body and the state shown in FIG. 5 is obtained.
これを１６００°Ｃで２時間焼成すると一部残った遮蔽
部材（９）は加熱されて焼失し、塗型層（１７）及び無
機粒子状物から成る充填材（１９）の水分凝縮層（３３
）は加熱乾燥され自然崩壊し、所望のセラミックス成形
体が得られる。この際充」直材（１９）は焼結用原料と
同じ融点を有する無機粒子状物から成っているため、焼
結用原形体と反応することはなく、電子顕微鏡による観
察結果でも焼結体の品質及び表面性状を悪くするといっ
た不都合は起こっていないことが判った。When this is baked at 1600°C for 2 hours, the remaining shielding member (9) is heated and burned away, and the coating layer (17) and the moisture condensation layer (33) of the filler (19) made of inorganic particles are heated and burned away.
) is heated and dried to naturally disintegrate, yielding the desired ceramic molded body. At this time, the raw material (19) is made of inorganic particles that have the same melting point as the raw material for sintering, so it does not react with the original material for sintering, and the observation results with an electron microscope show that the sintered material is It was found that no problems such as deterioration of quality and surface properties occurred.
尚、実施例では焼結用原料と充填材は同じ材質の同一融
点のものを用いたが充填材は焼結用原料の遣点以上の融
点を有するものであればよく同一材哲にする必要はない
。In the examples, the sintering raw material and the filler were made of the same material and have the same melting point, but the filler may be of the same material as long as it has a melting point higher than the melting point of the sintering raw material. There isn't.
例えば酸化アルミニウム焼結用原料に対し、ムライト（
３Ａｅ２０３・２Ｓｉ０２）ラスツレ−トライヤーで造
粒した顆粒を焼成した粉末（耐火度１８２０°Ｃ）を用
いても同様の作用効果が得られる。For example, compared to the raw material for aluminum oxide sintering, mullite (
3Ae203/2Si02) Similar effects can be obtained by using a powder (refractory rating: 1820°C) obtained by firing granules granulated in a Rustley dryer.
また、実施例では焼結用原料として酸化アルミニウム粉
末を用いたが炭化珪素、窒化珪素、ムライト、コーディ
エライト、チタン酸カリウム、そのイ（す非酸化物、酸
化物のいずれでもよく、この場合充填材は焼結用原料の
冷点以上の融点を有するものを用いればよい。In addition, in the examples, aluminum oxide powder was used as the raw material for sintering, but silicon carbide, silicon nitride, mullite, cordierite, potassium titanate, and any of their non-oxides or oxides may be used. The filler may have a melting point higher than the cold point of the sintering raw material.
また無機粒子状物を吸水性を持つ多孔質の粒子状物にす
れば水分を内部に含ませることができるため、水分凝縮
層（３３）がほとんど形成されず充填材（１９）は型ば
らしの際にエヤーブローにより焼結用原形体（３２）の
表面から簡単に払い落すことが可能になる。In addition, if the inorganic particulate material is made into porous particulate material that has water absorption properties, water can be contained inside, so that almost no water condensation layer (33) is formed, and the filler material (19) can be easily molded. At this time, it becomes possible to easily blow it off from the surface of the sintering original body (32) by blowing with air.
（発明の効果）
本発明は、焼結用原形体を成形するに際して焼結用原料
の融点以上の融点を有する無機粒子状物を充填材として
使用するので焼結用原形体に付着していても焼成の際に
焼結用原形体に反応したり焼きついて焼結体の品質、表
面性状を低下させる等の不都合を起こすことがない。(Effects of the Invention) The present invention uses inorganic particulate matter having a melting point higher than the melting point of the sintering raw material as a filler when molding the sintering material, so that it does not adhere to the sintering material. The sintered body does not react with or burn into the original sintering body during firing, causing problems such as deterioration of the quality and surface properties of the sintered body.
第１図は原形模型板の断面図、第２図は遮蔽部材の加湿
状態を示す断面図、第３図は半割型の造型状態を示す断
面図、第４図は焼結用原形体の成形状態を示す断面図、
第５図は焼結用原形体の取り出し状態を示す断面図。
（１）：原形模型板
（９）：遮蔽部材
（１８） ：造型枠体
（１９） ：無機粒子状物から成る充填材（２６） ：
焼結用原料スラリー
（３１） ：キャビティ
１−ノ／
手１回
卒２同
写３図
茅４図
斗５図Fig. 1 is a cross-sectional view of the original model plate, Fig. 2 is a cross-sectional view showing the humidified state of the shielding member, Fig. 3 is a cross-sectional view showing the half-split molding state, and Fig. 4 is a cross-sectional view of the original mold for sintering. A cross-sectional view showing the molded state,
FIG. 5 is a cross-sectional view showing the state in which the original body for sintering is taken out. (1): Original model board (9): Shielding member (18): Molding frame (19): Filler made of inorganic particulate matter (26):
Raw material slurry for sintering (31): Cavity 1-no/Hand 1 Graduation 2 Same photo 3 Fig. 4 Fig. 5
Claims (1)
部材あるいはスラリー溶媒が浸透可能な遮蔽部材を密着
し、該密着した遮蔽部材上に造型枠体を載置すると共に
該造型枠体内に充填材を充填し、該充填材の上面を密閉
して造型枠体内を負圧にし、もって前記遮蔽部材を充填
材側に吸着し、ついで前記原形模型板を遮蔽部材から離
型して造型面を有する半割型を造型し、該半割型と同様
にして造型したもう一つの半割型と型合せしてキャビテ
ィを形成し、該キャビティ内に焼結用原料に溶媒を加え
て成る焼結用原料スラリーを注入し、しかる後前記造型
枠体内の負圧状態を解除して半割型を崩壊し、もって焼
結用原形体を取り出す焼結用原形体の成形方法において
、前記充填材が前記焼結用原料の融点以上の融点を有す
る無機粒子状物であることを特徴とする焼結用原形体の
成形方法。A shielding member that can be dissolved by a slurry solvent or a shielding member that can be penetrated by a slurry solvent is closely attached to the surface of the original model plate, a molding frame is placed on the tightly attached shielding member, and a filler is placed inside the molding frame. The upper surface of the filler is sealed to create a negative pressure inside the molding frame, thereby adsorbing the shielding member to the filler, and then releasing the original model plate from the shielding member to form a half having a molding surface. A sintering raw material obtained by molding a split mold, molding it with another half mold molded in the same manner as the half mold to form a cavity, and adding a solvent to the sintering raw material in the cavity. In the method for forming a sintering original body, in which a slurry is injected, the negative pressure inside the molding frame is released, the half mold is collapsed, and the sintering original form is taken out. 1. A method for forming a preform for sintering, characterized in that the material is an inorganic particulate material having a melting point higher than the melting point of a raw material for sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124367A JPH0712606B2 (en) | 1988-05-20 | 1988-05-20 | Molding method for prototype for sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63124367A JPH0712606B2 (en) | 1988-05-20 | 1988-05-20 | Molding method for prototype for sintering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01294004A true JPH01294004A (en) | 1989-11-28 |
| JPH0712606B2 JPH0712606B2 (en) | 1995-02-15 |
Family
ID=14883647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63124367A Expired - Fee Related JPH0712606B2 (en) | 1988-05-20 | 1988-05-20 | Molding method for prototype for sintering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712606B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117774112A (en) * | 2024-02-23 | 2024-03-29 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
-
1988
- 1988-05-20 JP JP63124367A patent/JPH0712606B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117774112A (en) * | 2024-02-23 | 2024-03-29 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
| CN117774112B (en) * | 2024-02-23 | 2024-05-24 | 山东三责半导体新材料有限公司 | Preparation method of large-size silicon carbide triple helical shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0712606B2 (en) | 1995-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100668574B1 (en) | Core Compositions and Articles with Improved Performance for Use in Castings for Gas Turbine Applications | |
| EP0255577B1 (en) | Method of producing mold for slip casting | |
| JPH0813446B2 (en) | Slip casting method | |
| JP2854814B2 (en) | Vanishing model casting | |
| JPH01294004A (en) | Molding of original body for sintering | |
| JPH01210305A (en) | Forming of original body for sintering | |
| JPH01297114A (en) | Mesh sealing material for honeycomb filter | |
| JPH04224604A (en) | Preparation of part from metal powder or ceramic powder | |
| JPH02104461A (en) | Vacuum anti-gravity type casting device and method for casting thin part | |
| JPS62128711A (en) | Molding tool having permeability | |
| JP3074004B2 (en) | Manufacturing method of ceramic products | |
| JPH0663684A (en) | Production of ceramic core for casting | |
| JP2654823B2 (en) | Method for producing short fiber molded body | |
| JPH01275103A (en) | Molding of sintering prototype | |
| JP2863085B2 (en) | Casting mold and casting method | |
| JPS58167052A (en) | Casting method | |
| JPH08244018A (en) | Mold of hydraulic inorganic molded article | |
| JPH0462521B2 (en) | ||
| JP3425457B2 (en) | Ceramic slip casting method | |
| JPH0818306B2 (en) | Molding method for casting mold | |
| JPH11291217A (en) | Method for molding ceramic powder | |
| JPH01244806A (en) | Molding method for ceramic molded body | |
| JPS6244506A (en) | Manufacture of porous sintered body of stainless steel powder | |
| JPH0336611B2 (en) | ||
| JPH0534103B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |