JPH03150269A - Production of ceramic component and jig therefor - Google Patents
Production of ceramic component and jig thereforInfo
- Publication number
- JPH03150269A JPH03150269A JP1287501A JP28750189A JPH03150269A JP H03150269 A JPH03150269 A JP H03150269A JP 1287501 A JP1287501 A JP 1287501A JP 28750189 A JP28750189 A JP 28750189A JP H03150269 A JPH03150269 A JP H03150269A
- Authority
- JP
- Japan
- Prior art keywords
- jig
- sintering
- degreasing
- furnace
- ceramic
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000005238 degreasing Methods 0.000 claims abstract description 24
- 238000005245 sintering Methods 0.000 claims abstract description 24
- 238000000465 moulding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 abstract description 15
- 239000011230 binding agent Substances 0.000 abstract description 8
- 229910052581 Si3N4 Inorganic materials 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004898 kneading Methods 0.000 abstract 1
- 239000003960 organic solvent Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、セラミックス部品製造方法及びその治具に関
する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a ceramic component manufacturing method and a jig therefor.
（従来の技術）
セラミックス部品の製造方法には、金型成形法、ラバー
プレス法、押出成形法、射出成形法、鋳込成形法、等さ
まざまのものがある。これらの成形法にセラミックス粉
体の成形性を改善する目的で、多種多様の有機材料が、
結合剤、解謬剤、湿潤剤、潤滑剤、可塑剤、等として添
加されている。これらの有機材料とセラミックス粉体と
の混線物が成形されたものをグリーン成形体と呼ぶ。(Prior Art) There are various methods for manufacturing ceramic parts, such as a molding method, a rubber press method, an extrusion molding method, an injection molding method, and a casting method. In order to improve the formability of ceramic powder in these forming methods, a wide variety of organic materials are used.
It is added as a binder, dispersing agent, wetting agent, lubricant, plasticizer, etc. A molded product of a mixture of these organic materials and ceramic powder is called a green molded product.
このグリーン成形体中の有機材料は、脱脂工程における
炉内で徐々に加熱して、揮発分解する。そして、この脱
脂後に焼結工程が行われる。このように、脱脂工程と焼
結工程と互いに切り離された工程で行われている。たと
えば、脱脂工程においては、ステンレス綱のあみ網とフ
レームからなる脱脂容器にグリーン成形体と同材質のセ
ラミックス粉末（つめ粉）を入れ、その粉体中にグリー
ン成形体を一個ずつ埋没または載置した状態で、不活性
ガス雰囲気または空気の気流中にて脱脂していた。また
、その後工程である焼結工程においてはグリーン成形体
と同一材質または焼結に影響のない他種セラミックスで
焼成用容器に、脱脂されたグリーン成形体を移載して、
不活性ガスまたは空気雰囲気あるいはその加圧雰囲気に
て焼結していた。The organic material in this green molded body is gradually heated in a furnace during the degreasing process to be volatile and decomposed. After this degreasing, a sintering process is performed. In this way, the degreasing process and the sintering process are performed in separate processes. For example, in the degreasing process, ceramic powder (nail powder) made of the same material as the green compacts is placed in a degreasing container made of a stainless steel mesh and frame, and the green compacts are buried or placed one by one in the powder. In this state, degreasing was carried out in an inert gas atmosphere or air stream. In addition, in the subsequent sintering process, the degreased green molded body is transferred to a firing container made of the same material as the green molded body or another type of ceramic that does not affect sintering.
Sintering was performed in an inert gas or air atmosphere, or in a pressurized atmosphere.
（発明が解決しよとする課題）
しかるに、脱脂工程から焼結工程に移るとき、脱脂され
たグリーン成形体を焼結用容器に移載しなければならな
い上に、つめ粉をグリーン成形体から払拭する必要があ
り、作業がすこぶる面倒であるばかりか、グリーン成形
体を損傷する虞がある。さらに、つめ粉は、数回の使用
によりカーボン残渣で汚れるため、約ｔｏｏｏ℃にて気
中加熱して回収しなれけばならない不具合をもっている
。(Problem to be solved by the invention) However, when moving from the degreasing process to the sintering process, the degreased green molded body must be transferred to a sintering container, and the nail powder must be removed from the green molded body. It is necessary to wipe it off, which is not only a very troublesome work, but also there is a risk of damaging the green molded body. Furthermore, nail powder becomes contaminated with carbon residue after being used several times, and therefore has the disadvantage that it must be recovered by heating in air at about 100°C.
本発明は、上記事情を勘案し°てなされたもので、脱脂
後、他の容器に移載することなく焼結することのできる
セラミックス部品製造方法及びその治具を提供すること
を目的とする。The present invention has been made in consideration of the above circumstances, and aims to provide a method for manufacturing ceramic parts and a jig therefor, which can be sintered after degreasing without being transferred to another container. .
［発明の構成］
（課題を解決するための手段と作用）
本発明のセラミックス部品製造方法及びその治具は、脱
脂工程が終り、焼結工程に移行するとき、被脱脂体を敷
板に積載したまま、囲い枠及び蓋板をセットするように
したもので、焼結段取時間の短縮が可能となり、生産性
が大幅に向上することはもとより、脱脂工程後に、被脱
脂体に触れる必要がなくなるので、表面損傷の虞がなく
なり、高品質のセラミックス部品を得ることができる。[Structure of the Invention] (Means and Effects for Solving the Problems) The method for manufacturing ceramic parts and the jig thereof of the present invention are such that when the degreasing process is finished and the sintering process is started, the object to be degreased is loaded on the base plate. By setting the enclosure frame and lid plate together, it is possible to shorten the sintering setup time, greatly improving productivity, and it is no longer necessary to touch the object to be degreased after the degreasing process. Therefore, there is no risk of surface damage and high quality ceramic parts can be obtained.
（実施ｆｌ） 以下、本発明の一実施例図面を参照して詳述する。(Implementation fl) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図は、この実施例のセラミックス部品製造方法に用
いられる治具（Ｊ）を示している。この治具Ｕ）は、矩
形板状の敷板（１）と、この敷板（１）の長手方向両端
部に立設された一対の矩形板状の係止板（２）、（２）
と、これらの係止板（２）、（２）の内側が係止される
ように敷板（１）上に載置される囲い枠（３）と、この
囲い枠（３）の上端部に着脱自在に嵌合される蓋板（４
）とからなっている。そして、蓋板（４）の一方の主面
には、囲い枠（３）の上端部が嵌合する浅い凹部（５）
が設けられている。また、敷板（１）５係止板（２）、
（２）、囲い枠（３）および蓋板（０は、窒化ケイ素（
ＳＩ３Ｎ４）の焼結体からなっている。FIG. 1 shows a jig (J) used in the ceramic component manufacturing method of this embodiment. This jig U) consists of a rectangular plate-shaped bottom plate (1), and a pair of rectangular plate-shaped locking plates (2), (2) erected at both longitudinal ends of the bottom plate (1).
and an enclosing frame (3) that is placed on the bottom plate (1) so that the inside of these locking plates (2) and (2) are locked, and a A lid plate (4) that is removably fitted
). One main surface of the lid plate (4) has a shallow recess (5) into which the upper end of the enclosure frame (3) fits.
is provided. In addition, the bottom plate (1) 5 locking plate (2),
(2), the enclosure frame (3) and the lid plate (0 is silicon nitride (
It is made of a sintered body of SI3N4).
つぎに、上記構成の治具（」）を用いたこの実施列のセ
ラミックス部品製造方法について述べる。Next, a method for manufacturing ceramic parts of this embodiment using the jig ('') having the above configuration will be described.
まず、射出成形機により、例えば肉厚ｌＯ■■、直径５
０■膳のグリーン成形体（５）を成形する。このグリー
ン成形体（５）は、窒化ケイ素（ＳｉｉＮｉ）からなる
セラミックス粉末１００重量部と、樹脂系バインダ２３
〜３０重量部とを混練したものである。First, using an injection molding machine, for example, a molding machine with a wall thickness of lO
A green molded body (5) having a size of 0.0 cm is molded. This green molded body (5) is made of 100 parts by weight of ceramic powder made of silicon nitride (SiiNi) and 23 parts by weight of a resin binder.
~30 parts by weight were kneaded.
そして樹脂系バインダ２３〜３０重量部中にポリスチレ
ンとポリブチルメタクリレートと１−１０ｆｆｔ部のポ
リアミド系ホットメルト接着剤とパラフィンを含んでい
る。パラフィン系や低分子量ワックス系バインダーは加
熱昇温中に融解して成形体から滲出するため、つめ粉に
よって吸着させる必要がある。また、つめ粉は熱分解物
の雰囲気作りに効果があり、加熱昇温途中におけるバイ
ンダーの熱減量速度を抑えてクラックの発生を防止する
。しかし本実施例に用いた樹脂系バインダーは低分子量
成分の配合比を少量としたことによってグリーン成形体
の強度を高めつめ粉を不要とした。つぎに、グリーン成
形体（５）・・−を敷板（１）上に複雑数段かつ多列に
積み重ねる。このとき、グリーン成形体（５）・・・は
、係止板（２）、（２）により、崩れ落ちるのが防止さ
れている。しかし、つめ粉は使われておらず、各グリー
ン成形体（５）・・・間にはギャップが存在している。The resin binder contains polystyrene, polybutyl methacrylate, 1 to 10 fft parts of a polyamide hot melt adhesive, and paraffin in 23 to 30 parts by weight of the resin binder. Paraffin-based and low-molecular-weight wax-based binders melt and exude from the molded product during heating and temperature rise, so they need to be adsorbed with nail powder. In addition, nail powder is effective in creating an atmosphere for the pyrolyzed product, and suppresses the rate of thermal loss of the binder during heating and temperature rise, thereby preventing the occurrence of cracks. However, the resin binder used in this example had a small blending ratio of low molecular weight components, thereby increasing the strength of the green molded product and eliminating the need for packing powder. Next, the green molded bodies (5)...- are stacked on the floor plate (1) in several complicated stages and in multiple rows. At this time, the green molded bodies (5) are prevented from collapsing by the locking plates (2), (2). However, no nail powder is used, and a gap exists between each green molded body (5).
ついで、グリーン成形体（５）・・・を解放状態で積載
している敷板（１）を脱脂炉（６）中に配置する。しか
して、不活性ガスまたは空気雰囲気中にて、室温から炉
温１２０℃まで１時間当たり５℃で昇温させ、ついで、
１２０℃から２６０℃まで１時間当たり３℃で昇湿させ
、ついで、２６０℃から４００℃まで１時間当たりｌＯ
℃で昇湿させ、最後に、４００℃から５００℃まで１時
間当たり３０℃で昇温させる。その結果被脱脂体（７）
・・・中に含まれている有機剤は、大部分飛散する。し
かして、炉冷が完了した被脱脂体（１）・・・を敷板（
１）ごと炉外にとり出す。ついで、囲い枠（３）をそれ
らの内面が係止板（２）、（２）に係止されるように敷
板（１）上に載置する。さらに、囲い枠（３）の上端部
に蓋板（４）を嵌合する。その結果、脱脂が完了した被
脱脂体（７）・・・は、敷板（１）、係止板（２）。Next, the bottom plate (1) on which the green molded bodies (5) are loaded in an open state is placed in a degreasing furnace (6). The temperature was then raised from room temperature to 120°C in an inert gas or air atmosphere at a rate of 5°C per hour.
The humidity was increased from 120°C to 260°C at a rate of 3°C per hour, and then from 260°C to 400°C at a rate of 1O per hour.
The humidity is raised at 30°C per hour, and finally the temperature is raised from 400°C to 500°C at a rate of 30°C per hour. As a result, the body to be degreased (7)
...Most of the organic agents contained therein will scatter. After the furnace cooling has been completed, the object to be degreased (1)... is placed on the bottom plate (
1) Take everything out of the furnace. Next, the enclosure frame (3) is placed on the bottom plate (1) so that its inner surfaces are locked to the locking plates (2), (2). Furthermore, a cover plate (4) is fitted to the upper end of the enclosure frame (3). As a result, the objects to be degreased (7) that have been completely degreased are the bottom plate (1) and the locking plate (2).
（２）、囲い枠（３）および蓋板（４）により形成され
た収納空間（８）中に密閉される。ついで、収納空間（
８）に被脱脂体（１）・・・が収納された治具（」）を
第３図に示すように、焼結炉（９）中に配置する。(2) is sealed in a storage space (8) formed by an enclosure frame (3) and a cover plate (4). Next, storage space (
8) The jig ('') containing the object to be degreased (1)... is placed in the sintering furnace (9) as shown in FIG.
そうして、この焼結炉が（９）にて、治具（」）に密閉
状態にて保持された被脱脂体（７）・−・を約１４００
℃乃至１８００℃に加熱する。その結果、被脱脂体（１
）・−は、焼結される。Then, this sintering furnace (9) removes about 1,400 pieces of the object to be degreased (7), which is held in a sealed state in the jig ('').
Heat to 1800°C. As a result, the body to be degreased (1
)・− are sintered.
以上のように、この実施例においては、脱脂工程が終り
、焼結工程に移行するとき、被脱脂体（７）・−・を敷
板（１）に積載したま′ま、囲い枠（３）及び蓋板（４
）をセットするだけでよい。また、脱脂工程中につめ粉
を使う必要がない。したがって、以下のような顕著な効
果を奏することができる。As described above, in this embodiment, when the degreasing process is finished and the sintering process is started, the objects to be degreased (7) are placed on the bottom plate (1) and the surrounding frame (3) is moved to the sintering process. and lid plate (4
) just set it. Also, there is no need to use nail powder during the degreasing process. Therefore, the following remarkable effects can be achieved.
すなわち、■焼結用段取時間の短縮が可能になるので、
生産性が大幅に向上する。■脱脂工程後に、被脱脂体（
７）・・・に触れる必要がなくなるので、表面損傷の虞
がなくなり、高品質のセラミックス部品を得ることがで
きる。In other words, it is possible to shorten the setup time for sintering,
Productivity is greatly improved. ■After the degreasing process, the object to be degreased (
7) Since there is no need to touch..., there is no risk of surface damage, and high quality ceramic parts can be obtained.
なお、上記実施例において、治具（」）の材質としては
、窒化ケイ素を用いたが、グリーン成形体（５）・・・
と治具Ｕ）とが同一材質であるか、又は、焼結工程にて
両者間に化学反応が生じない限り、どのようなセラミッ
クスを用いてもよい。In the above example, silicon nitride was used as the material for the jig (''), but the green molded body (5)...
Any ceramic may be used as long as the jig U) and the jig U) are made of the same material or a chemical reaction does not occur between them during the sintering process.
さらに、治具（」）の係止板（２）を敷板（１）に対し
て着脱自在に設けてもよい。また、係止板の形状は、一
対の平板に限ることなく、円筒状板、角筒状板、等、任
意でよい。同じく、囲い枠（３）の形状も円筒状、多角
状、等、任意の形状でよい。Furthermore, the locking plate (2) of the jig ('') may be provided to be detachably attached to the bottom plate (1). Further, the shape of the locking plate is not limited to a pair of flat plates, and may be any shape such as a cylindrical plate, a rectangular cylindrical plate, etc. Similarly, the shape of the surrounding frame (3) may be arbitrary, such as cylindrical or polygonal.
さらにまた、グリーン成形体（５）・−・の成形方法は
、射出成形法に限ることなく、押出し成形法、金型成形
法、鋳込成形法、ラバープレス法、等でもよい。Furthermore, the method for molding the green molded bodies (5) is not limited to the injection molding method, and may be an extrusion molding method, a mold molding method, a casting molding method, a rubber press method, or the like.
〔発明の効果］
本発明のセラミックス部品製造方法及びその治具は、脱
脂工程が終り、焼結工程に移行するとき、被脱脂体を敷
板に積載したまま、囲い枠及び蓋板をセットするだけで
よい。また、脱脂工程中につめ粉を使う必要がない。し
たがって、以下のような顕著な効果を奏することができ
る。すなわち、■焼結用段取時間の短縮が可能になるの
で、生産性が大幅に向上する。■脱脂工程後に、被脱脂
体に触れる必要がなくなるので、表面損傷の虞がなくな
り、高品質のセラミックス部品を得ることができる。[Effects of the Invention] The ceramic component manufacturing method and its jig of the present invention are such that when the degreasing process is finished and the transition is made to the sintering process, the enclosing frame and cover plate are simply set while the object to be degreased is loaded on the floor plate. That's fine. Also, there is no need to use nail powder during the degreasing process. Therefore, the following remarkable effects can be achieved. That is, (1) it becomes possible to shorten the setup time for sintering, so productivity is significantly improved; - Since there is no need to touch the object to be degreased after the degreasing process, there is no risk of surface damage and high quality ceramic parts can be obtained.
第１図は本発明の一実施例のセラミックス部品製造方法
に用いられる治具の構成図、第２図及び第３図は本発明
の一実施例のセラミックス部品製造方法の説明図である
。
（」）：治具、（１）：敷板、（２）：係止板、（３）
：囲い枠、（４）：蓋板（蓋体） 、（５） ニゲリ
ーン成形体、（７）：被脱脂体。FIG. 1 is a block diagram of a jig used in a method of manufacturing ceramic parts according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of a method of manufacturing ceramic parts according to an embodiment of the present invention. (''): Jig, (1): Bottom plate, (2): Locking plate, (3)
: Enclosing frame, (4): Lid plate (lid body), (5) Nigeleen molded body, (7): Body to be degreased.
Claims (4)
程と、この脱脂工程にて脱脂された成形体を焼結する焼
結工程とを有するセラミックス部品製造方法において、
上記成形体を上記脱脂工程から上記焼結工程まで同一の
治具に保持させることを特徴とするセラミックス部品製
造方法。(1) A ceramic component manufacturing method comprising a degreasing step of degreasing a molded body made of ceramics, and a sintering step of sintering the molded body degreased in this degreasing step,
A method for manufacturing ceramic parts, characterized in that the molded body is held in the same jig from the degreasing step to the sintering step.
徴とする請求項（１）記載のセラミックス部品製造方法
。(2) The method for manufacturing ceramic parts according to claim (1), wherein the jig is made of the same material as the molded body.
かつ焼結工程時には密閉状態で保持させることを特徴と
する請求項（１）記載のセラミックス部品製造方法。(3) The method for manufacturing ceramic parts according to claim (1), wherein the molded body is held in a jig in an open state during the degreasing process and in a closed state during the sintering process.
、この敷板上に設けられた係止体と、この係止体により
上記敷板の所定位置に係止され上記敷板上に載置された
成形体を包囲する囲い枠と、この囲い枠の上端部に着脱
自在に設けられ上記囲い枠により包囲された空間を密閉
する蓋体とを具備することを特徴とする治具。(4) A bottom plate on which a molded body made of ceramic is placed, a locking body provided on the bottom plate, and a molding that is locked at a predetermined position on the bottom plate by the locking body and placed on the bottom plate. A jig comprising: an enclosing frame that surrounds the body; and a lid that is removably attached to the upper end of the enclosing frame and seals a space surrounded by the enclosing frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1287501A JPH03150269A (en) | 1989-11-06 | 1989-11-06 | Production of ceramic component and jig therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1287501A JPH03150269A (en) | 1989-11-06 | 1989-11-06 | Production of ceramic component and jig therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03150269A true JPH03150269A (en) | 1991-06-26 |
Family
ID=17718162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1287501A Pending JPH03150269A (en) | 1989-11-06 | 1989-11-06 | Production of ceramic component and jig therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03150269A (en) |
-
1989
- 1989-11-06 JP JP1287501A patent/JPH03150269A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4708838A (en) | Method for fabricating large cross section injection molded ceramic shapes | |
| JPH07164196A (en) | Preparation of japanese horse-chestnut | |
| JPS60195062A (en) | Method of dewaxing ceramic molded body | |
| JPH03150269A (en) | Production of ceramic component and jig therefor | |
| JPH07116487B2 (en) | Method for degreasing metal powder injection molded body | |
| JPS5895640A (en) | Manufacture of ceramic product | |
| JPH046159A (en) | Production of silicon nitride-based ceramics sintered body | |
| JPH0770610A (en) | Method for sintering injection-molded product | |
| JP3001450B2 (en) | Manufacturing method of ceramic sintered body | |
| JPH11131103A (en) | Composition for powder injection molding and production of powder injection molded goods | |
| JPS61117166A (en) | Method of dewaxing ceramic injection molding | |
| WO2022260354A1 (en) | Metal injection molded product system for manufacturing metal frame base product, and method for manufacturing metal frame base product by using same | |
| JPH06158109A (en) | Method for dewaxing and sintering molded body of metal or ceramic powder | |
| JPS5891053A (en) | Manufacture of ceramic products | |
| JP2001019563A (en) | Production of ceramic part | |
| JPH059076A (en) | Production of aluminum nitride substrate | |
| JP3188344B2 (en) | Foam molding method and apparatus | |
| JPH04124203A (en) | Binder for powder metallurgy and method for degreasing green compact | |
| JPH0641601B2 (en) | Molding composition | |
| JPH02182804A (en) | Method for degreasing powder molding body | |
| JPH10259404A (en) | Calcined compact of carbonyl iron powder and powder injection molding method | |
| JPH07115942B2 (en) | Method for manufacturing thin plate ceramics sintered body | |
| JPS63250407A (en) | Method for removing binder from injection-molded metal body | |
| EP0196600A2 (en) | Method for fabricating of large cross section injection molded ceramic shapes | |
| JPS6167703A (en) | Production of porous metallic pattern |