JPS6068904A - Ceramics part and manufacture thereof - Google Patents
Ceramics part and manufacture thereofInfo
- Publication number
- JPS6068904A JPS6068904A JP58177388A JP17738883A JPS6068904A JP S6068904 A JPS6068904 A JP S6068904A JP 58177388 A JP58177388 A JP 58177388A JP 17738883 A JP17738883 A JP 17738883A JP S6068904 A JPS6068904 A JP S6068904A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic component
- powder
- ceramic
- component according
- combustion chamber
- 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
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明はセラミツバ−品及びその製造方法に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a ceramic ceramic product and a method for manufacturing the same.
自動車用ディーゼルエンジンにおいては、ビストンクラ
ウンの他に副燃焼室を設け、この副燃焼室内に空気の渦
流を生せしめるとともに、この渦流中に燃料を噴射して
、その大部分を燃焼させる渦流室式と呼ばれる燃焼方式
のものがある。In automobile diesel engines, a vortex chamber type is used in which an auxiliary combustion chamber is provided in addition to the piston crown, and a vortex of air is created in this auxiliary combustion chamber, and fuel is injected into this vortex and most of it is combusted. There is a combustion method called .
この方式のディーゼルエンジンに設けられる副燃焼室は
、第１図および第２図の１で足すように、空気と燃料を
受け入れるためにコツプ形をなし、上部は空気および燃
料の噴射ノズルに向けて開放するとともに１底部には噴
射炎を主燃焼室へ向けて噴射する噴火口２が形成しであ
る。The auxiliary combustion chamber provided in this type of diesel engine is shaped like a cup to receive air and fuel, as indicated by 1 in Figures 1 and 2, and the upper part faces the air and fuel injection nozzles. When opened, a nozzle 2 is formed at the bottom to inject flame toward the main combustion chamber.
しかして、副燃焼室は従来溶解金１＾材で形成されてき
たが、最近耐熱性や耐摩耗性などが優品をセラミツｇ仝
製造する場合には、泥しよう鋳込み成形法、低圧鋳込み
成形法あるいは射出成形法によって粉末成形体を成形す
ることが試みられている。しかしながら従来のものでは
、均質な成形体を得ることが難かしかった。これはこれ
らの成形方法はいずれも杓料粉末を流動状態にして成形
型内部に流し込んで粉末成形体を成形するためと思われ
る。すなわちこれらの方法では使用する粉末にはパラフ
ィンなどの通常の粘結剤に加えてＭｔ動性を与えるため
にポリスチロールやＥＶＡなどの粘結剤を添加している
。Conventionally, the sub-combustion chamber has been made of molten metal, but recently, when producing ceramic products with excellent heat resistance and wear resistance, slurry casting and low-pressure casting are being used. Alternatively, attempts have been made to mold powder compacts by injection molding. However, with the conventional methods, it was difficult to obtain a homogeneous molded product. This seems to be because in all of these molding methods, the powdered material is made into a fluid state and poured into the mold to form a powder compact. That is, in these methods, in addition to a normal binder such as paraffin, a binder such as polystyrene or EVA is added to the powder used to impart Mt mobility.
しかしながら、ポリスチロールやＥＶＡなどの粘結剤は
、熱分解するためには高温度（４００〜５００℃）で長
時間（３時間以上）の加熱を必要とする性質を有してい
る。このため、粉末成形体を成形した後に、粉末に添加
した粘結剤を除去することを目的として行なう脱脂工程
は、前記の粘結剤の存在に、より大変長い時間を要する
とともに均一な脱脂がなかなか困難である。However, binders such as polystyrene and EVA require heating at high temperatures (400 to 500° C.) for long periods of time (3 hours or more) in order to be thermally decomposed. For this reason, the degreasing process that is carried out for the purpose of removing the binder added to the powder after molding the powder compact takes a very long time due to the presence of the binder and does not allow for uniform degreasing. It is quite difficult.
従って、結果的にめ１ｊ燃焼室の製造時間か長くなると
いう藺題がある。Therefore, there is a problem that the manufacturing time of the first combustion chamber becomes longer as a result.
部品及びその製造方法を提供するものである。 The present invention provides parts and a method for manufacturing the same.
末を圧縮成形してなる成形体であって機械加工による穿
孔部を有することを特徴とする。このセラミックス部品
は、成形後脱脂したもの、更に焼結したものでもよい。It is a molded body formed by compression molding the end, and is characterized by having perforations formed by machining. This ceramic part may be degreased after molding or may be sintered.
また、本発明のセラミツ唇備品の製造方法は、金型プレ
スにより粉末を加圧して、後加工用位置決め部を有する
有底の粉末成形体を成形し、その後に前記粉末成形体の
位置決め部に機械加工を施すことを特徴を有するもので
、筒形、環形、皿形、腕形などのいずれでも良い。また
、このセラミツル部品は金型プレスにより成形が困難で
機械加工を必要とする部分を有し、その箇所はセラミツ
４品の周壁部、底部のいずれでも良く、その形態本発明
の製造方法は、まず金型プレスにより粉末を加圧して粉
末成形体を成形する。粉末にはパラフィンなどの通常の
粘結剤を加えるだけで良く、流動性を伺加するための粘
結剤を添加成形する。後加工用位置決め部は機械加工が
必要な箇所に、機械加工を容易に行なえるような形状で
形成する。前記金型プレスのような圧縮成形は、粉末を
均質に成形することができる。In addition, the method for manufacturing ceramic lip fittings of the present invention involves pressurizing the powder with a mold press to form a bottomed powder compact having a positioning section for post-processing, and then attaching the powder compact to the positioning section of the powder compact. It is characterized by being machined, and may be cylindrical, ring-shaped, dish-shaped, arm-shaped, etc. In addition, this ceramic vine part has a part that is difficult to mold with a mold press and requires machining, and that part can be either the peripheral wall part or the bottom part of the four ceramic parts, and the manufacturing method of the present invention has the following shape: First, powder is pressed using a die press to form a powder compact. It is sufficient to add a normal binder such as paraffin to the powder, and a binder is added to the powder to improve fluidity. The positioning portion for post-processing is formed at a location where machining is required and has a shape that allows easy machining. Compression molding, such as the mold press described above, can uniformly mold powder.
次いで、粉末成形体の位置決め部に機械加工を行ない所
定形状に形成する。機械加工の種類け特定されない。Next, the positioning portion of the powder compact is machined to form a predetermined shape. The type of machining is not specified.
その後、脱脂処理を行ない粉末成形体に添加しである粘
結剤を除去する。粉末成形体を成形する粉末には通常の
粘結剤が添加しであるだけであるから、この粘結剤が熱
分解する温度と時間で粉末成形体を加熱する。例えばパ
ラフィンを熱分解する場合には、温度２００ ”Ｃ１時
間ＩＨである。従って、粉末に流動性を与えるために添
加するポリスチロールなどの粘結剤の熱分解温度および
時間に比して夫々大変小さい。Thereafter, a degreasing treatment is performed to remove the binder added to the powder compact. Since the powder used to form the powder compact contains only an ordinary binder, the powder compact is heated at a temperature and time at which the binder is thermally decomposed. For example, when paraffin is thermally decomposed, the temperature is 200" C1 hour IH. Therefore, the thermal decomposition temperature and time are much higher than the thermal decomposition temperature and time of a binder such as polystyrene, which is added to give fluidity to the powder. small.
さらに、粉末成形体を焼結して焼結体を成形する。Furthermore, the powder compact is sintered to form a sintered body.
以下本発明の一実施例を図面について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
本発明を第１図および第２図で示すディーゼルエンジン
の副燃焼室１を上２ミツ終成形する場合について説明す
る。The present invention will be described with reference to a case in which the upper two auxiliary combustion chambers 1 of a diesel engine shown in FIGS. 1 and 2 are final formed.
まず、例えば窒化けい素（ＳｊｓＮ＜）粉末に焼結助剤
と粘結剤例えばパラフィンを加えて造粒し粉末を得る。First, a sintering aid and a binder such as paraffin are added to, for example, silicon nitride (SjsN<) powder and granulated to obtain a powder.
次いで、金型プレスにより粉末を成形圧７５０”ｆ？／
ａｍ”で加圧し、第３図で示す粉末成形体３を成形する
。粉末成形体３の底部の上面および下面には、第４図で
も示すように副燃焼室１の噴火口２の開口を形作る位置
決め部４，４′を形成する。位置決め部４．４′は略半
円形をなすもので、一方の位置決め部４の円弧縁部と他
方の位置決め部４′の直線縁部は夫々丸みを有するよう
に形成する。この丸みの部分は副燃焼室においてエンジ
ンの圧縮行程の終わりに、シリンダ内の空気を導入し、
強い渦流を生せしめるために、また、青火後、主燃焼室
に効率良く燃焼ガスを移動せしめるために重要なもので
ある。Next, the powder was molded with a mold press at a pressure of 750"f/
am'' to form a powder compact 3 as shown in FIG. The positioning parts 4 and 4' are formed in a substantially semicircular shape, and the arcuate edge of one positioning part 4 and the straight edge of the other positioning part 4' are rounded. This rounded part introduces the air in the cylinder at the end of the compression stroke of the engine in the sub-combustion chamber,
This is important in order to generate a strong vortex flow and to efficiently move combustion gas to the main combustion chamber after the green flame.
なお、この噴火口２の開口における丸み部分は、切削加
工により精度良く成形することが困難であるが、金型プ
レスでは精度良く成形できる。Note that although it is difficult to form the rounded portion of the opening of the crater 2 with high precision by cutting, it can be formed with high precision by mold pressing.
次いで、フライス盤などの加工により位置決め部４．４
に基づいて粉末成形体３の底部に噴火口２を形成する。Next, the positioning portion 4.4 is processed using a milling machine or the like.
A crater 2 is formed at the bottom of the powder compact 3 based on the following.
この場合、位置決め部４゜４′は噴火口２を形成するた
めに刃物を案内する役目をなしている。In this case, the positioning portions 4° 4' serve to guide the blade in order to form the crater 2.
次いで、粉末成形体を加熱して脱脂処理を行ない、粉末
に添加したパラフィンを熱分解して除去する。Next, the powder compact is heated to perform a degreasing treatment, and the paraffin added to the powder is thermally decomposed and removed.
さらに、粉末成形体を焼結して第１図および第２図で示
す副燃焼室１を得る。Furthermore, the powder compact is sintered to obtain the auxiliary combustion chamber 1 shown in FIGS. 1 and 2.
なお、本発明により副燃焼室を製造する場合に脱脂時間
は９６０分を要したが、従来の製造方法により製造する
場合に脱脂時間は６０００分を要し、本発明の場合は１
１５の時間に短縮することが判った。In addition, when manufacturing the auxiliary combustion chamber according to the present invention, the degreasing time required 960 minutes, whereas when manufacturing the auxiliary combustion chamber using the conventional manufacturing method, the degreasing time required 6000 minutes, and in the case of the present invention, the degreasing time required 1
It was found that the time required was reduced to 15.
明したように、均質なセラミツメ備品が得られさらに製
造に際しては、金型プレスにより粉末成形体を成形する
ので、従来に比し脱脂工程に要する時間が大幅に減少し
、セラミツ４３品を製造する時間が短縮できる。As explained above, homogeneous ceramic fixtures can be obtained, and since the powder compact is molded using a mold press during manufacturing, the time required for the degreasing process is significantly reduced compared to the conventional method, and 43 ceramic products can be manufactured. It can save time.
第１図および第２図は夫々ディーゼルエンジンにおける
副燃焼室を示す縦断面図および平面図、第３図は本発明
により第１図および第２図で示す副燃焼室を製造する実
施例における粉末成形体を示す縦断面図、第４図は同粉
末成形体における位置決め部を示す拡大断面図である。
１・・・副燃焼室、２・・・噴火口、３・・・粉末成形
体、４．４′・・・位置決め部。1 and 2 are a vertical cross-sectional view and a plan view, respectively, showing a sub-combustion chamber in a diesel engine, and FIG. 3 is a powder powder in an embodiment of manufacturing the sub-combustion chamber shown in FIGS. 1 and 2 according to the present invention. FIG. 4 is an enlarged sectional view showing a positioning portion in the powder compact. DESCRIPTION OF SYMBOLS 1... Sub-combustion chamber, 2... Crater, 3... Powder compact, 4.4'... Positioning part.
Claims (1)
あって機械加工による穿孔部を有するセラミックス部品
。 （２）穿孔部は、′貫通孔である特許請求の範囲第１項
に記載のセラミックス部品。 （３）穿孔部の開口縁部は圧縮成形により形成された面
取り部を有する特許請求の範囲第１項または第２項に記
載のセラミックス部品。 ４）セラミックス部品は、脱脂しておる特許請求の範囲
第１項から第３項のいずれかに記載のセラミックス部品
。 ５） セラミックス部品は、脱脂した後、焼結してなる
特許請求の範囲第４項に記載のセラミックス部品。 わ）セラミックス部品は、内燃機関用副燃焼室に用いる
ものである特許請求の範囲第１項から第４項のいずれか
に記載のセラミックス部品。 （７）粉末を圧縮加圧して、後加工用位置決め部を有す
る有底の粉末成形体を成形し、その後に前記粉末成形体
の位置決め部に機械加工を施すことを特徴とするセラミ
ックス部品の製造方法。 （８）粉末成形体の底部に後加工用位置決め部を形成し
、この位置決め部に貫通孔を加工する特許請求の範囲第
７項に記載のセラミックス部品の製造方法。 （９） セラミックス部品は内燃機関の副燃焼室である
特許請求の範囲第７項に記載のセラミックス部品の製造
方法。[Scope of Claims] (1) A ceramic part that is a compact formed by compression molding ceramic powder and has perforations formed by machining. (2) The ceramic component according to claim 1, wherein the perforated portion is a through hole. (3) The ceramic component according to claim 1 or 2, wherein the opening edge of the perforation has a chamfer formed by compression molding. 4) The ceramic component according to any one of claims 1 to 3, wherein the ceramic component is degreased. 5) The ceramic component according to claim 4, wherein the ceramic component is degreased and then sintered. iii) The ceramic component according to any one of claims 1 to 4, wherein the ceramic component is used in a sub-combustion chamber for an internal combustion engine. (7) Production of ceramic parts, characterized in that the powder is compressed and pressurized to form a bottomed powder compact having a positioning section for post-processing, and then the positioning section of the powder compact is machined. Method. (8) The method for manufacturing a ceramic component according to claim 7, wherein a positioning part for post-processing is formed at the bottom of the powder compact, and a through hole is formed in the positioning part. (9) The method for manufacturing a ceramic component according to claim 7, wherein the ceramic component is a sub-combustion chamber of an internal combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58177388A JPS6068904A (en) | 1983-09-26 | 1983-09-26 | Ceramics part and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58177388A JPS6068904A (en) | 1983-09-26 | 1983-09-26 | Ceramics part and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6068904A true JPS6068904A (en) | 1985-04-19 |
| JPS6353922B2 JPS6353922B2 (en) | 1988-10-26 |
Family
ID=16030064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58177388A Granted JPS6068904A (en) | 1983-09-26 | 1983-09-26 | Ceramics part and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6068904A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02136408A (en) * | 1988-11-18 | 1990-05-25 | Nozawa Corp | Manufacturing of resonator type soundproof panel |
| CN109986694A (en) * | 2018-12-28 | 2019-07-09 | 上海中盟石油天然气有限公司 | Make the distribution of PDC drill bit ceramic mold |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0463809U (en) * | 1990-10-09 | 1992-05-29 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593920A (en) * | 1979-01-11 | 1980-07-16 | Toyota Motor Corp | Construction of engine combustion chamber |
| JPS55114521A (en) * | 1979-02-28 | 1980-09-03 | Asahi Glass Co Ltd | Method of working ceramics stator for gas turbine |
| JPS5623517A (en) * | 1979-08-02 | 1981-03-05 | Toshiba Corp | Sub-combustion chamber in internal combustion engine |
| JPS5691953A (en) * | 1979-12-24 | 1981-07-25 | Riken Corp | Production of combustion chamber insert for diesel engine |
| JPS57179912U (en) * | 1981-05-08 | 1982-11-15 | ||
| JPS5831106U (en) * | 1981-08-24 | 1983-03-01 | 日本特殊陶業株式会社 | Ceramic green sheet punching mold |
| JPS5898210A (en) * | 1981-12-09 | 1983-06-11 | 株式会社東芝 | Manufacture of ceramic sintered body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831106B2 (en) * | 1979-04-24 | 1983-07-04 | 出光興産株式会社 | thermoplastic resin composition |
-
1983
- 1983-09-26 JP JP58177388A patent/JPS6068904A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593920A (en) * | 1979-01-11 | 1980-07-16 | Toyota Motor Corp | Construction of engine combustion chamber |
| JPS55114521A (en) * | 1979-02-28 | 1980-09-03 | Asahi Glass Co Ltd | Method of working ceramics stator for gas turbine |
| JPS5623517A (en) * | 1979-08-02 | 1981-03-05 | Toshiba Corp | Sub-combustion chamber in internal combustion engine |
| JPS5691953A (en) * | 1979-12-24 | 1981-07-25 | Riken Corp | Production of combustion chamber insert for diesel engine |
| JPS57179912U (en) * | 1981-05-08 | 1982-11-15 | ||
| JPS5831106U (en) * | 1981-08-24 | 1983-03-01 | 日本特殊陶業株式会社 | Ceramic green sheet punching mold |
| JPS5898210A (en) * | 1981-12-09 | 1983-06-11 | 株式会社東芝 | Manufacture of ceramic sintered body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02136408A (en) * | 1988-11-18 | 1990-05-25 | Nozawa Corp | Manufacturing of resonator type soundproof panel |
| CN109986694A (en) * | 2018-12-28 | 2019-07-09 | 上海中盟石油天然气有限公司 | Make the distribution of PDC drill bit ceramic mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353922B2 (en) | 1988-10-26 |
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