JPH0857696A - High-temperature impact powder solidification molding method and powder solidification molding device - Google Patents

High-temperature impact powder solidification molding method and powder solidification molding device

Info

Publication number
JPH0857696A
JPH0857696A JP6192527A JP19252794A JPH0857696A JP H0857696 A JPH0857696 A JP H0857696A JP 6192527 A JP6192527 A JP 6192527A JP 19252794 A JP19252794 A JP 19252794A JP H0857696 A JPH0857696 A JP H0857696A
Authority
JP
Japan
Prior art keywords
powder
explosive
raw material
solidification molding
material powder
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
Application number
JP6192527A
Other languages
Japanese (ja)
Other versions
JP3436589B2 (en
Inventor
Masahiro Fujita
昌大 藤田
Kazuyuki Sotomoto
和幸 外本
Takeshi Izuma
猛志 伊妻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP19252794A priority Critical patent/JP3436589B2/en
Publication of JPH0857696A publication Critical patent/JPH0857696A/en
Application granted granted Critical
Publication of JP3436589B2 publication Critical patent/JP3436589B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/001Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by explosive charges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B11/00Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/004Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses involving the use of very high pressures

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

PURPOSE: To execute solidification molding of powders of extremely high- hardness materials including diamond in a high-temp. state. CONSTITUTION: The raw material powder to be molded us packed into a powder packing section 7 and an explosive 2 is set above this power apart therefrom. After the powder part is heated, the explosive part is set right above the powder packing section. Detonation waves are generated from inside the explosive 2 when a detonator 1 is initiated thereafter. These detonation waves are transmitted via water to the powder and an ultra-high pressure acts on the powder. The hard powder is thus subjected to the solidification molding.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は衝撃波を利用する粉末固
化成形法及びそのための粉末固化成形装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder solidification molding method using shock waves and a powder solidification molding apparatus therefor.

【0002】[0002]

【従来の技術】従来、ダイヤモンドに代表される超硬物
質のバルク材は、焼結助剤を加えて粉末を高温に長時間
保持する「焼結法」によって緻密化されている。
2. Description of the Related Art Conventionally, a bulk material of a super hard material typified by diamond has been densified by a "sintering method" in which a sintering aid is added and the powder is kept at a high temperature for a long time.

【0003】焼結助剤を用いない場合には、超高温超高
圧を長時間作用させる静的な方法によって小さな単結晶
を成長させ、ダイヤモンドのバルク材を得ることも試み
られている。
When no sintering aid is used, it has been attempted to grow a small single crystal by a static method in which ultrahigh temperature and high pressure are applied for a long time to obtain a bulk material of diamond.

【0004】この他、高速飛翔体の衝突などによって得
られる衝撃超高圧によって、超硬物質粉末のバルク材を
得ようとする試みも多くなされてきた。
In addition, many attempts have been made to obtain a bulk material of superhard material powder by the impact ultrahigh pressure obtained by collision of a high-speed flying object.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、ダイヤ
モンドを始めとする超硬物質粉末を焼結する場合には、
焼結を助けるために超硬物質そのものより軟らかい添加
剤を必ず用いているため十分な性質の材料を得ることが
困難であった。また、静的に超高温超高圧下で結晶を成
長させる方法は、膨大なコストがかかることと、得られ
た材料が単結晶であるために強度の異方性が大きいとい
う欠点を有している。さらに、衝撃超高圧下での粉末固
化に関しては、いまだに研究段階の域を出ず、内部に割
れを有する場合などがあり、材料内に不均一を生じると
いう問題があった。
However, in the case of sintering cemented carbide powder such as diamond,
It is difficult to obtain a material with sufficient properties because an additive softer than the super hard material itself is always used to assist the sintering. Further, the method of statically growing a crystal under ultra-high temperature and ultra-high pressure has a drawback that the cost is enormous and that the obtained material is a single crystal, so that the strength anisotropy is large. There is. Furthermore, regarding solidification of powder under impact ultra-high pressure, there is a problem that the material is still out of the research stage and has internal cracks, resulting in non-uniformity in the material.

【0006】本発明は、こうした実情の下で焼結助剤を
使用することなく、実質上割れを伴なわずに超硬物質粉
末を瞬間的に固化させることができ、しかも得られた衝
撃固化材が巨視的には等方性を示す衝撃固化方法及びそ
のための装置を提供することを目的とするものである。
Under the above circumstances, the present invention can instantaneously solidify a cemented carbide powder without using a sintering aid and substantially without cracking, and the resulting impact solidification. An object of the present invention is to provide an impact solidification method in which a material is macroscopically isotropic, and an apparatus therefor.

【0007】[0007]

【課題を解決するための手段】本発明者は、鋭意検討し
た結果、爆薬部と離間させた位置にて予め原料粉末部を
加熱した上で両者を水を介してセットして起爆させるこ
とにより前記課題を解決し得ることを知見し、本発明に
至った。すなわち、本発明は、(1)原料粉末を加熱し
た後、該原料粉末上に水圧容器を介して爆薬を配置し、
該爆薬を起爆させて発生させた衝撃波を該原料粉末に作
用させることを特徴とする高温衝撃粉末固化成形方法、
(2)加熱装置を備えた原料粉末充填部、該原料粉末充
填部上に載置させる位置とそれから離間させる位置とを
移動する爆薬部とからなる粉末固化成形装置であって、
該爆薬部には原料粉末部との間に介在する水圧容器が連
設されていることを特徴とする高温衝撃粉末固化成形装
置に関する。
Means for Solving the Problems As a result of intensive studies, the present inventor has found that a raw material powder part is heated in advance at a position separated from an explosive part and then both are set through water to initiate an explosion. The present invention has been accomplished by finding that the above problems can be solved. That is, the present invention is (1) after heating a raw material powder, disposing an explosive on the raw material powder via a hydraulic container,
A high-temperature shock powder solidification molding method, characterized in that a shock wave generated by detonating the explosive is applied to the raw material powder;
(2) A powder solidification molding apparatus comprising a raw material powder filling section provided with a heating device, and an explosive section moving between a position placed on the raw material powder filling section and a position separated from the raw material powder filling section,
The present invention relates to a high-temperature impact powder solidification molding apparatus, wherein a hydraulic container interposed between the explosive part and the raw material powder part is connected.

【0008】上記のように、本発明は、高温下でしかも
水中衝撃波の作用によって衝撃的に粉末の固化を行うこ
とのできる装置である。高温に加熱される粉末部と爆薬
を装填した水中衝撃波発生装置は、予め離れた位置にセ
ットされ、所定の温度条件に達した後に自動的に発破位
置に運ばれ、衝撃固化が実施されるものである。
As described above, the present invention is an apparatus capable of impact-solidifying powder under the action of an underwater shock wave at high temperature. An underwater shock wave generator loaded with a powder part that is heated to a high temperature and an explosive is set at separate positions in advance, and is automatically carried to the blasting position after reaching a predetermined temperature condition, and impact solidification is performed. Is.

【0009】以上のような構成を有するこの発明は、次
のように作用する。
The present invention having the above-described structure operates as follows.

【0010】衝撃波の作用時間はきわめて短く、衝撃固
化は極短時間のうちに完了する。しかしながら水を圧力
の伝達媒質として利用することにより、作用時間の長い
圧力波を発生させることができ、このため従来の衝撃固
化で生じるような割れを発生させる希薄波等の影響を小
さくすることができる。
The action time of the shock wave is extremely short, and impact solidification is completed within an extremely short time. However, by using water as a pressure transmission medium, it is possible to generate a pressure wave having a long working time, and therefore, it is possible to reduce the influence of a rare wave or the like that causes cracks that occur in conventional impact solidification. it can.

【0011】また水中衝撃波の制御は、容器の集束条件
を変えることによって容易に制御できる。たとえば水容
器の傾斜角や爆薬部と粉末部の断面積などを変化させる
ことによって制御することができる。これに加えて粉末
の高温加熱は、粉末粒子の表面溶融や粒子自身の塑性変
形を容易にする。このことで成形固化に必要とされる衝
撃圧力値を下げることが可能となり、試料内部に割れを
実質上発生させないことが可能になる。
The control of the underwater shock wave can be easily controlled by changing the focusing condition of the container. For example, it can be controlled by changing the inclination angle of the water container or the cross-sectional area of the explosive portion and the powder portion. In addition to this, high temperature heating of the powder facilitates surface melting of the powder particles and plastic deformation of the particles themselves. This makes it possible to reduce the impact pressure value required for molding and solidification, and it becomes possible to substantially prevent cracks from occurring inside the sample.

【0012】本発明の装置は、高温下で安全に衝撃実験
を実施するために、爆薬と粉末部を個別に離間して設置
し、昇温後爆薬部を粉末部にセットできるものである。
爆薬部と粉末部はさらに水を介して接するため、発破ま
での間に爆薬部が高温にさらされる危険を除くことがで
きる。
In the apparatus of the present invention, the explosive and the powder part can be installed separately from each other and the explosive part can be set in the powder part after the temperature rise, in order to safely carry out the impact test at a high temperature.
Since the explosive part and the powder part are further in contact with each other via water, it is possible to eliminate the risk that the explosive part is exposed to a high temperature before blasting.

【0013】[0013]

【実施例】以下、図面に記載の実施例に基づいてこの発
明をより具体的に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more concretely with reference to the embodiments shown in the drawings.

【0014】ここで、図1は水中集束衝撃波を作用させ
ることのできる本発明の高温衝撃粉末固化成形装置の概
略断面図である。この装置は、上方の爆薬部と水の容器
部と、下方の粉末加熱部から構成されている。他に2本
の空圧シリンダー部(13〜15)があり、これらによ
って加熱時に水圧容器4とともに爆薬部(1〜3,1
8)を粉末加熱部(8〜11)から離間することができ
る。爆薬部と加熱部は予め水平(12の調整)と軸(3
〜9)の調整を行う。その後、爆薬部は、図2に示すよ
うに空圧シリンダー部を作動させることにより、そのシ
リンダー部蓋13を爆薬2及び水圧容器4の支持板18
と係合させて粉末加熱部(8〜11)から離間させ、そ
の上方に保持される。次いで、粉末容器8の粉末充填部
7内にダイヤモンド等の超硬物質粉末が充填され、電気
炉蓋17がかぶせられる。この状態で加熱が開始される
が、好ましくは、このとき粉末は真空中か不活性ガス雰
囲気中に保持される。所定の温度(例えばダイヤモンド
の場合では約800〜1000℃)に達した後、高温衝
撃固化のための操作がなされる。即ち、高温加熱後、遠
隔操作によって電気炉の蓋(17)が取り除かれ、同時
にシリンダーが降下して加熱部に爆薬部がセットされ
る。セットの完了は19のスイッチによって知ることが
でき、両装置が接触後すぐに、好ましくは3秒以内に発
破が完了するようにさせる。不具合が生じた場合には、
シリンダーを上昇させることによって安全が確保され
る。
Here, FIG. 1 is a schematic cross-sectional view of a high temperature impact powder solidification molding apparatus of the present invention capable of exerting a focused shock wave in water. This device comprises an upper explosive part, a water container part, and a lower powder heating part. In addition, there are two pneumatic cylinder parts (13 to 15), which allow the explosive parts (1 to 3, 1) together with the hydraulic container 4 during heating.
8) can be separated from the powder heating part (8-11). The explosive part and heating part are preliminarily horizontal (12 adjustments) and axis (3
~ 9) are adjusted. After that, the explosive section operates the pneumatic cylinder section as shown in FIG. 2 to move the cylinder section lid 13 to the explosive 2 and the support plate 18 for the hydraulic container 4.
And is separated from the powder heating section (8 to 11) and held above it. Then, the powder filling portion 7 of the powder container 8 is filled with the ultra-hard material powder such as diamond, and the electric furnace lid 17 is covered. Heating is started in this state, but at this time, the powder is preferably kept in a vacuum or an inert gas atmosphere. After reaching a predetermined temperature (for example, about 800 to 1000 ° C. in the case of diamond), an operation for high temperature impact solidification is performed. That is, after heating at high temperature, the lid (17) of the electric furnace is removed by remote control, and at the same time, the cylinder is lowered to set the explosive section to the heating section. The completion of the set can be known by means of 19 switches, allowing both devices to complete the blast immediately after contact, preferably within 3 seconds. If something goes wrong,
Safety is ensured by raising the cylinder.

【0015】両装置が接触後1分程度までは水が沸騰す
ることはなく、安全に高温での衝撃処理が実施される。
13,14はシリンダー部の防爆システムで、これらの
最上部分を水圧容器を含む爆発容器の水平面以下に配置
することによって、飛散する爆発容器によるシリンダー
部の損傷を防止することができる。またシリンダー部は
その一部を砂中に埋めて、衝撃を受ける部分とシリンダ
ーを支える金床部が直接接しないように配設することも
できる。13,14は併せて、砂塵等の侵入によるシリ
ンダー部の摺動速度の変化も抑えることができる。
Water does not boil up to about 1 minute after contact between both devices, and shock treatment can be safely carried out at a high temperature.
Reference numerals 13 and 14 denote explosion-proof systems for cylinders. By arranging the uppermost parts of the explosion-proof systems below the horizontal surface of an explosion container including a hydraulic container, it is possible to prevent damage to the cylinder due to the exploding explosion container. Alternatively, the cylinder part may be partially buried in sand so that the part to be impacted and the anvil part supporting the cylinder do not come into direct contact with each other. 13 and 14 can also suppress the change in the sliding speed of the cylinder portion due to the intrusion of dust or the like.

【0016】図3は粉末部の詳細を示す。固化の対象と
なる粉末は、図3中の21で示される。20は粉末の蓋
になる金属板であり、水と粉末が直接接触することによ
る材料表面の凹凸をなくすために設置する。本発明の固
化装置は、一般の粉末材料の成形固化に適用することが
できるが、特にダイヤモンド等の超硬物質粉末の固化成
形に有用である。なお、この発明は上記実施例に限定さ
れるものではなく、この発明の精神を逸脱しない範囲で
種々の改良をなし得ることは無論である。
FIG. 3 shows details of the powder portion. The powder to be solidified is designated by 21 in FIG. Reference numeral 20 is a metal plate that serves as a lid for the powder, and is installed to eliminate irregularities on the material surface due to direct contact between water and the powder. The solidifying apparatus of the present invention can be applied to general solidification and molding of powder materials, but is particularly useful for solidifying and molding ultra-hard material powder such as diamond. The present invention is not limited to the above embodiments, and it goes without saying that various improvements can be made without departing from the spirit of the present invention.

【0017】[0017]

【発明の効果】以上の記載より明らかなように、本発明
に係る粉末成形固化のための水中集束衝撃波を用いた高
温衝撃固化装置によれば、予備的に十分な高温状態にま
で安全に加熱することができ、そのため必要な衝撃圧力
値を低下させることができ、また水を圧力伝達媒として
利用することで希薄波等の影響を抑制できるので、従来
バルク材を得ることが困難であったダイヤモンド等の超
硬物質セラミックスを、実質上割れを生じさせることな
く、衝撃的に、瞬間的に固化することが可能となる。こ
のことにより、従来のように焼結助剤を使用することな
しにバルク材が得られる。また衝撃固化された材料は、
微細な粒子の集合体であるので巨視的にみると等方性を
有する材料であり、単結晶材と比較して高い靭性を有す
る。
As is apparent from the above description, according to the high temperature shock-solidifying apparatus using the underwater focused shock wave for powder compaction and solidification according to the present invention, it is possible to safely preheat to a sufficiently high temperature state. Therefore, it is possible to reduce the required impact pressure value, and it is difficult to obtain a conventional bulk material because the influence of a rare wave or the like can be suppressed by using water as a pressure transmission medium. Cemented carbide ceramics such as diamond can be impacted and instantaneously solidified without causing substantial cracking. As a result, a bulk material can be obtained without using a sintering aid as in the past. In addition, the impact-hardened material is
Since it is an aggregate of fine particles, it is a material that is isotropic when viewed macroscopically, and has higher toughness than a single crystal material.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の高温衝撃固化装置の概略断面模式図。FIG. 1 is a schematic cross-sectional schematic view of a high temperature impact solidification apparatus of the present invention.

【図2】本発明の高温衝撃固化装置において、爆薬部と
粉末部とを離間させた状態の概略断面の模式図。
FIG. 2 is a schematic view of a schematic cross section in a state where the explosive portion and the powder portion are separated from each other in the high temperature impact solidification device of the present invention.

【図3】本発明の高温衝撃固化装置の粉末充填部分の詳
細図。
FIG. 3 is a detailed view of a powder filling portion of the high temperature impact solidification device of the present invention.

【符号の説明】[Explanation of symbols]

1 電気*** 2 爆薬 3 爆薬容器(鋼製) 4 水容器(鋼製) 5 水 6 断熱材 7 粉末充填部 8 粉末容器(鋼製) 9 モーメンタムトラップ(鋼製) 10 ヒータ 11 断熱材 12 金床(鋼製) 13 シリンダー部蓋 14 シリンダー保護管 15 空圧シリンダー 16 砂 17 電気炉蓋 18 爆薬及び水圧容器支持板 19 スイッチ 20 金属板 21 粉末 1 Electric Detonator 2 Explosive 3 Explosive Container (Steel) 4 Water Container (Steel) 5 Water 6 Insulation 7 Powder Filling Section 8 Powder Container (Steel) 9 Momentum Trap (Steel) 10 Heater 11 Insulation 12 Anvil (Steel) 13 Cylinder cover 14 Cylinder protection tube 15 Pneumatic cylinder 16 Sand 17 Electric furnace lid 18 Explosive and hydraulic vessel support plate 19 Switch 20 Metal plate 21 Powder

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 原料粉末を加熱した後、該原料粉末上に
水圧容器を介して爆薬を配置し、該爆薬を起爆させて発
生させた衝撃波を該原料粉末に作用させることを特徴と
する高温衝撃粉末固化成形方法。
1. A high temperature characterized in that, after heating the raw material powder, an explosive is placed on the raw material powder via a hydraulic container, and a shock wave generated by detonating the explosive is applied to the raw material powder. Impact powder solidification molding method.
【請求項2】 原料粉末が超硬物質粉末である請求項1
記載の高温衝撃粉末固化成形方法。
2. The raw material powder is a cemented carbide powder.
The high temperature impact powder solidification molding method described.
【請求項3】 加熱装置を備えた原料粉末充填部、該原
料粉末充填部上に載置させる位置とそれから離間させる
位置とを移動する爆薬部とからなる粉末固化成形装置で
あって、該爆薬部には原料粉末充填部との間に介在する
水圧容器が連設されていることを特徴とする高温衝撃粉
末固化成形装置。
3. A powder solidification molding apparatus comprising: a raw material powder filling section provided with a heating device; and an explosive section moving between a position to be placed on the raw material powder filling section and a position to be separated from the raw material powder filling section. A high-temperature impact powder solidification molding apparatus characterized in that a hydraulic container interposed between the raw material powder filling section and the section is continuously provided.
【請求項4】 原料粉末が超硬物質粉末である請求項3
記載の高温衝撃粉末固化成形装置。
4. The raw material powder is a cemented carbide powder.
The high temperature impact powder solidification molding apparatus described.
JP19252794A 1994-08-16 1994-08-16 High temperature impact powder solidification molding method and powder solidification molding device Expired - Lifetime JP3436589B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19252794A JP3436589B2 (en) 1994-08-16 1994-08-16 High temperature impact powder solidification molding method and powder solidification molding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19252794A JP3436589B2 (en) 1994-08-16 1994-08-16 High temperature impact powder solidification molding method and powder solidification molding device

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008307592A (en) * 2007-06-18 2008-12-25 Asahi Kasei Chemicals Corp Explosive working method
CN102601361A (en) * 2012-04-01 2012-07-25 北京理工大学 Split high-temperature preheating powder explosive sintering device
CN103862696A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Conical underground explosion shock wave compaction device
CN103862697A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Cylindrical underground explosion shock wave compaction device
CN114834080A (en) * 2022-04-14 2022-08-02 安徽理工大学 Spherical explosive shock wave compactor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008307592A (en) * 2007-06-18 2008-12-25 Asahi Kasei Chemicals Corp Explosive working method
CN102601361A (en) * 2012-04-01 2012-07-25 北京理工大学 Split high-temperature preheating powder explosive sintering device
CN103862696A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Conical underground explosion shock wave compaction device
CN103862697A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Cylindrical underground explosion shock wave compaction device
CN114834080A (en) * 2022-04-14 2022-08-02 安徽理工大学 Spherical explosive shock wave compactor

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