JPH0148324B2 - - Google Patents
Info
- Publication number
- JPH0148324B2 JPH0148324B2 JP59210312A JP21031284A JPH0148324B2 JP H0148324 B2 JPH0148324 B2 JP H0148324B2 JP 59210312 A JP59210312 A JP 59210312A JP 21031284 A JP21031284 A JP 21031284A JP H0148324 B2 JPH0148324 B2 JP H0148324B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- roll
- molded material
- powder
- molded
- 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
- 239000000463 material Substances 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 23
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 238000005245 sintering Methods 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
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Al若しくはAl合金多孔質板状成形材
の製造装置に係り、詳しくは、種々の寸法のAl
系板状成形材を製造することができるAl若しく
はAl合金多孔質板状成形材の製造装置に係る。Detailed Description of the Invention <Object of the Invention> Industrial Field of Application The present invention relates to an apparatus for producing Al or Al alloy porous plate-shaped formed materials, and more specifically,
The present invention relates to an apparatus for manufacturing an Al or Al alloy porous plate-like molded material, which can produce a plate-like molded material based on Al or Al alloy.
従来の技術
従来から、銅等の金属粉末を焼結した多孔質焼
結体が種々な用途、例えば、フイルターや吸音材
として用いられ、その優れた特性が認められてい
る。BACKGROUND ART Porous sintered bodies made by sintering metal powders such as copper have been used for various purposes, such as filters and sound-absorbing materials, and their excellent properties have been recognized.
しかし、最近、特公昭56−11375号、特公昭58
−31378号等に示されているように、Al系多孔質
体が開発され、軽量であること、加工性が良いこ
と、焼結温度が低いため経済的であること等の利
点によつて注目され、吸音材その他の用途が開発
されている。これらの金属多孔質体は通常金属粉
をグラフアイト容器に散布して焼結によつて製造
されるが生産性が悪い上、板厚の寸法精度を向上
させる事が困難であつた。 However, recently, Special Publication No. 11375, Special Publication No. 11375, Special Publication No. 11375,
As shown in No. 31378, Al-based porous materials were developed and attracted attention due to their advantages such as being lightweight, having good workability, and being economical due to the low sintering temperature. It has been developed as a sound-absorbing material and for other uses. These metal porous bodies are usually manufactured by scattering metal powder in a graphite container and sintering it, but the productivity is low and it is difficult to improve the dimensional accuracy of the plate thickness.
すなわち、従来の粉末から多孔質板材を製造す
る方法としては、プレスによりダイセツト内で粉
末を加圧成形し焼結する方法と直接焼結用トレー
に粉末を充填し焼結する方法とがあるが、前者に
おいては例えば500mm×500mmの大きさのものを加
圧成形するためには1000t以上の加圧が必要とな
り、大型板材の製造は困難である。 In other words, conventional methods for manufacturing porous plates from powder include a method in which the powder is pressure-formed in a die set using a press and sintered, and a method in which the powder is directly filled into a sintering tray and sintered. In the former case, for example, pressure of 1000 tons or more is required to pressure-form a material with a size of 500 mm x 500 mm, making it difficult to manufacture large plates.
また、トレーに充填して焼結する方法では、ト
レーの大きさによつて製品の大きさが制限され、
また、トレーに充填して積重ねて焼結するため、
トレーの寸法精度や散布方法によつて板厚精度の
影響を強く受け、板厚の調整が難かしい等の問題
がある。 In addition, with the method of filling a tray and sintering, the size of the product is limited by the size of the tray.
In addition, since the trays are filled and stacked and sintered,
The plate thickness accuracy is strongly affected by the dimensional accuracy of the tray and the dispersion method, and there are problems such as difficulty in adjusting the plate thickness.
また、ロール成形により圧粉体を成形し、これ
を連続して焼結を行ない、巻き取り機によつて焼
結板をコイル状に巻き取るという従来の方法では
板材、例えば、建材等に利用を行なう場合、再度
平板に戻すための成形が必要である事、さらに高
多孔質のAl焼結体では繰り返しの曲げ加工を施
すに足りる靭性に乏しいという問題がある。 In addition, the conventional method of forming a green compact by roll forming, sintering it continuously, and winding the sintered plate into a coil shape using a winder is not suitable for use in plate materials, such as building materials. When doing this, there is the problem that shaping is required to return it to a flat plate again, and that the highly porous Al sintered body lacks sufficient toughness to undergo repeated bending.
発明が解決しようとする問題点
本発明は、上記欠点の解決を目的とし、具体的
には、Al若しくはその合金を焼結して多孔質焼
結材を製造するのに先立つて多孔質の板状成形材
を効率良く、しかも、寸法にかかわらず、ロール
成形できるAl若しくはAl合金多孔質板状成形材
の製造装置を提供する。Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks. Specifically, the present invention aims to solve the above-mentioned drawbacks. To provide an apparatus for manufacturing an Al or Al alloy porous plate-shaped molded material, which can efficiently roll-form the shaped molded material regardless of the size.
＜発明の構成＞
問題点を解決するための手段ならびにその作用
以下、本発明の装置について第１図によつて説
明する。<Structure of the Invention> Means for Solving the Problems and Their Effects The apparatus of the present invention will be explained below with reference to FIG. 1.
まず、第１図は本発明の装置の一つの実施態様
の説明図であつて、Al又はその合金の原料粉末
８ａはホツパー３に供給され、このホツパー３の
下端の供給口から一対の加圧ロール１，１（第１
図において各加圧ロール１，１は点線で示す。）
の間に送られる。この供給口の幅は調整ねじ４に
よつて調整され、各加圧ロール１，１は間隙をお
いて配置し、このロール間隙は調整できるよう、
構成する。この場合、それら各加圧ロール１，１
の両側端面には、加圧ロール１の径より径が大き
い円板状サイドロール２を取付け、しかも、これ
らサイドロール２が互いに組合されるよう、加圧
ロール１，１を対向して配置する。このように大
径のサイドロール２が取付けられていると、加圧
ロール１，１間で粉末８ａを加圧一体化するとき
に、加圧ロール１，１の側端からこぼれることが
ない。 First, FIG. 1 is an explanatory diagram of one embodiment of the apparatus of the present invention, in which a raw material powder 8a of Al or its alloy is supplied to a hopper 3, and a pair of pressure Roll 1, 1 (first
In the figure, each pressure roll 1, 1 is indicated by a dotted line. )
sent between. The width of this supply port is adjusted by an adjustment screw 4, and the pressure rolls 1, 1 are arranged with a gap between them, so that the gap between the rolls can be adjusted.
Configure. In this case, each pressure roll 1, 1
Disc-shaped side rolls 2 having a diameter larger than that of the pressure roll 1 are attached to both end faces of the pressure roll 1, and the pressure rolls 1, 1 are arranged facing each other so that these side rolls 2 are combined with each other. . When the large-diameter side rolls 2 are attached in this way, when the powder 8a is pressed and integrated between the pressure rolls 1, 1, no spillage occurs from the side ends of the pressure rolls 1, 1.
次に、このようにホツパー３から原料粉末８ａ
を一対の加圧ロール１，１間に供給して板状の成
形材９を成形する際に、ホツパー３の間隙調節ね
じ４の調節によりその供給口からの原料粉末の供
給厚さや多孔率を調整する。 Next, the raw material powder 8a is transferred from the hopper 3 in this way.
When feeding powder between a pair of pressure rolls 1 and 1 to form a plate-shaped material 9, the feed thickness and porosity of the raw material powder from the feed port can be adjusted by adjusting the gap adjustment screw 4 of the hopper 3. adjust.
すなわち、原料粉末がAlやその合金であると、
形状が不規則のため、ホツパーの供給口の幅とロ
ール間隙を任意に選ぶことによつて粉末にかかる
圧力が変り、成形板材の多孔率を任意に変えるこ
とができる。 In other words, if the raw material powder is Al or its alloy,
Since the shape is irregular, the pressure applied to the powder can be changed by arbitrarily selecting the width of the hopper supply port and the roll gap, and the porosity of the molded plate material can be changed arbitrarily.
多孔率は０％に近い値も可能であるが、連通孔
である材料にするため15％以上になるように設定
する。また、100メツシユより粗い粉末を使用し
た場合、粉末の密度比は約45％であるため、ロー
ル加工後の多孔率は最低45〜50％に成形しないと
圧粉体が薄板の形状を保てない。つまり、ロール
加工成形後の多孔率は15〜50％の範囲である。 Although a value close to 0% is possible for the porosity, it is set to 15% or more in order to create a material with communicating pores. In addition, when using powder coarser than 100 mesh, the density ratio of the powder is approximately 45%, so the porosity after rolling must be formed to a minimum of 45-50% in order for the green compact to maintain its thin plate shape. do not have. In other words, the porosity after roll forming is in the range of 15 to 50%.
加圧ロール１の下部には切断機６が設置され、
ロール成形材９が下向きに送られて、その下端面
がリミツトスイツチ７に接触すると、リミツトス
イツチ７が働いて、支持具８によつて板状の成形
材９が自動的にはさまれ、切断機６によつて常に
一定の長さで切断される。これを繰返すことによ
つて板状の成形材９は並列に配列される。 A cutting machine 6 is installed at the bottom of the pressure roll 1,
When the rolled material 9 is fed downward and its lower end surface contacts the limit switch 7, the limit switch 7 operates and the plate-shaped material 9 is automatically sandwiched between the supports 8 and cut into the cutting machine 6. is always cut to a constant length. By repeating this process, the plate-shaped molded materials 9 are arranged in parallel.
なお、切断された成形材９はグリーンの状態の
ものであつて、これらの間には、カーボンシー
ト、その他成形体、焼結しない材質のシートを介
在させて置き、これを横にして積重ねると、この
積重ね状態のままで焼結炉で非酸化性雰囲気中で
焼結できる。 Note that the cut molded material 9 is in a green state, and a carbon sheet, other molded product, or a sheet of a non-sintered material is interposed between them, and these are stacked horizontally. Then, they can be sintered in this stacked state in a sintering furnace in a non-oxidizing atmosphere.
また、原料粉末はAl粉末若しくはAl合金粉末
の１種若しくは２種以上の混合物であり、また
は、Alと合金化する他の金属粉、例えば、Cu、
Si、Ni、Mn、Mg等の単体粉を添加しても加圧
時の粉末の接合部分で融着し、Al合金の多孔体
が得られる。添加量はAl中にそれぞれ単体の添
加の場合でCu0.5〜6.0％、Si0.5〜5.0％、Ni0.5〜
2.0％、Mn1.0〜3.0％、Mg1.0〜5.0％のものを得
ている。もちろん、これら２種以上を組み合わせ
て添加したものも得られる。焼結温度条件は成分
構成によりAlと添加成分との共晶温度からAl融
点の中間にあり、極端に液相がでて溶融変形また
は収縮が起らない温度に設定する。 In addition, the raw material powder is one type or a mixture of two or more types of Al powder or Al alloy powder, or other metal powder that alloys with Al, such as Cu,
Even if elemental powders such as Si, Ni, Mn, Mg, etc. are added, the powders are fused at the joints during pressurization, and a porous body of Al alloy is obtained. The amounts added are Cu0.5-6.0%, Si0.5-5.0%, and Ni0.5-6.0% when added alone to Al.
2.0%, Mn1.0~3.0%, Mg1.0~5.0%. Of course, a mixture of two or more of these can also be obtained. The sintering temperature condition is set to be between the eutectic temperature of Al and the additive components and the melting point of Al depending on the composition of the components, and is set at a temperature at which an extreme liquid phase does not occur and melting deformation or shrinkage does not occur.
また、焼結時にロール成形板と交互に積重ねる
シート若しくは織布は上、下の成形板が焼結時に
融着することを防ぐ目的で使用するものであつ
て、厚さ１mm以下のカーボンシート若しくはカー
ボン織布が有利に使用されるが、焼結時に悪い影
響を与えないものであれば良く、カーボンに限定
するものではない。 In addition, the sheets or woven fabrics that are alternately stacked with the roll-formed plates during sintering are used to prevent the upper and lower formed plates from fusing together during sintering, and carbon sheets with a thickness of 1 mm or less are used. Alternatively, a carbon woven fabric is advantageously used, but it is not limited to carbon, as long as it does not have a bad effect during sintering.
以上の通りに、本発明の装置で成形できる成形
材の大きさは加圧ロール１の幅によつて決まるの
で大型ロールを使用すれば、1000mm〜2000mm幅の
ような大型の多孔質板材の製造も可能である。ま
た、ロール間隙の調節によつて厚さ寸法が決ま
り、焼結による寸法変化が小さく、従来法と較べ
焼結品の厚さの寸法精度が高いものが得られる。 As mentioned above, the size of the molded material that can be formed with the apparatus of the present invention is determined by the width of the pressure roll 1, so if a large roll is used, large porous plates with a width of 1000 mm to 2000 mm can be manufactured. is also possible. Further, the thickness dimension is determined by adjusting the roll gap, and dimensional changes due to sintering are small, and a sintered product with higher dimensional accuracy in thickness than conventional methods can be obtained.
また、トレーに充填して焼結する従来法ではト
レー回りに粉末がこぼれ、ロスが大きいが本発明
の多孔質板状成形材の製造装置によれば、製品歩
留りが高く、また、従来法では少なくとも５mm以
上の底板厚さのトレーを使用するため、トレーの
熱容量が大きく、熱効率が悪いのに対し、本発明
では焼結時に伝熱性の良好なカーボンシートある
いはカーボン織布を間にはさむので熱効率が高
く、また、温度分布も均一に保持することができ
る。 In addition, in the conventional method of filling a tray and sintering, the powder spills around the tray, resulting in large losses, but according to the apparatus for producing porous plate-shaped molded materials of the present invention, the product yield is high. Because a tray with a bottom plate thickness of at least 5 mm or more is used, the tray has a large heat capacity and poor thermal efficiency.However, in the present invention, a carbon sheet or carbon fabric with good heat conductivity is sandwiched between the trays during sintering, resulting in thermal efficiency. The temperature distribution is high, and the temperature distribution can also be maintained uniformly.
更に、本発明は連続プロセスであるから従来法
に較べ生産スピードが大きく、トレー法の５倍以
上の生産スピードが得られる。 Furthermore, since the present invention is a continuous process, the production speed is higher than that of the conventional method, and the production speed is five times faster than that of the tray method.
以下、実施例により更に説明する。 This will be further explained below using examples.
実施例
粒度20〜150メツシユのAl粉９２重量部と粒度
100メツシユのAl−50％Cu合金８重量部を混合し
た混合粉を、ホツパー間隙4.5mmに調節したホツ
パーの供給口から、ロール間隙３mmに調節したロ
ール幅1000mmの加圧ロールに供給し、ロール成形
して板状成形材を降下させ、所定の長さとなつた
とき、ロール下方のリミツトスイツチが働き、板
状成形材は自動的に支持具にはさまれ、切断機に
よつて切断され、所定の長さのグリーンの板状成
形材を得た。Example 92 parts by weight of Al powder with a particle size of 20 to 150 mesh and particle size
A mixed powder containing 8 parts by weight of 100 mesh Al-50% Cu alloy is supplied from the supply port of the hopper with a hopper gap of 4.5 mm to a pressure roll with a roll width of 1000 mm and a roll gap of 3 mm. The plate-shaped material is formed and lowered, and when it reaches the predetermined length, a limit switch below the roll is activated, and the plate-shaped material is automatically sandwiched between the supports and cut by a cutting machine to the specified length. A green plate-shaped molded material with a length of .
このグリーンの板状成形材を0.5mmのカーボン
シートと交互に積重ねて焼結炉に入れ、600℃×
30分の条件で焼結し、幅1000mm、長さ2000mm、厚
さ３mmの多孔質焼結材を得た。 This green plate-shaped molded material was stacked alternately with 0.5 mm carbon sheets and placed in a sintering furnace at 600℃
Sintering was carried out for 30 minutes to obtain a porous sintered material with a width of 1000 mm, a length of 2000 mm, and a thickness of 3 mm.
寸法精度は３±0.2mm以内であつた。 The dimensional accuracy was within 3±0.2 mm.
この多孔質焼結材の多孔率は40％で、機械的性
質も引張り強さにおいて2.5Kg／mm2であり吸温板
用途に好適であつた。 This porous sintered material had a porosity of 40% and a tensile strength of 2.5 Kg/mm 2 in mechanical properties, making it suitable for use as a heat absorbing plate.
＜発明の効果＞
以上説明したように、本発明の装置は、ホツパ
ーと一対の加圧ロールと切断機とリミツトスイツ
チとを設け、ホツパーの供給口の幅と加圧ロール
のロール間隙との調整して板状成形材とし、これ
をリミツトスイツチの作動により切断する切断機
により切断して常に一定の長さの板状成形材とす
ることができるものである。<Effects of the Invention> As explained above, the apparatus of the present invention includes a hopper, a pair of pressure rolls, a cutter, and a limit switch, and adjusts the width of the supply port of the hopper and the gap between the pressure rolls. This can be cut into a plate-shaped molded material of a constant length by cutting it with a cutter that cuts by operating a limit switch.
従つて、1000mm×2000mmのような大型で板厚の
薄い多孔率15〜50％の多孔質材を寸法精度良く、
しかも、生産能率良く製造することができ、吸音
板その他多方面への応用が期待できるようになつ
た。 Therefore, we can produce large, thin, porous materials with a porosity of 15 to 50%, such as 1000 mm x 2000 mm, with good dimensional accuracy.
Moreover, it can be manufactured with high production efficiency, and can be expected to be applied to many other fields such as sound-absorbing plates.
第１図は本発明の実施態様の一例のロール成形
装置の縦断面図である。
符号１……加圧ロール、２……サイドロール、
３……ホツパー、４……ホツパー間隙調節ねじ、
５……バイブレーター、６……切断機、７……リ
ミツトスイツチ、８……支持具、９……成形材。
FIG. 1 is a longitudinal cross-sectional view of a roll forming apparatus as an example of an embodiment of the present invention. Code 1...pressure roll, 2...side roll,
3...Hopper, 4...Hopper gap adjustment screw,
5... Vibrator, 6... Cutting machine, 7... Limit switch, 8... Support tool, 9... Molding material.
Claims (1)
給され、この供給口の厚さを調整できるホツパー
と、このホツパーの下部に設けられてロール間隙
が調整できる一対の加圧ロールとから構成された
成形装置の前記供給口の厚さならびに前記ロール
間隙を調整して多孔率15〜50％の板状成形材を成
形する装置において、前記ロールの下方に前記ロ
ールで成形された板状成形材を切断する切断機と
この切断機の下方に前記成形材の支持具とこの支
持具の下方床面に前記成形材が一定の長さになつ
たとき、作動するリミツトスイツチとを設け、こ
のリミツトスイツチが作動すると、前記支持具が
自動的に前記成形材を挾持すると共に、前記切断
機が作動し、前記成形材が切断され、並列に配列
するよう構成してなることを特徴とするAl若し
くはAl合金多孔質板状成形材の製造装置。1. Al or Al alloy powder is supplied in the form of a plate from the lower end, and it consists of a hopper whose thickness can be adjusted at the supply port, and a pair of pressure rolls installed at the bottom of this hopper whose roll gap can be adjusted. In an apparatus for forming a plate-shaped material having a porosity of 15 to 50% by adjusting the thickness of the supply port and the gap between the rolls of the forming apparatus, the plate-shaped material formed by the roll is placed below the roll. A cutting machine that performs the cutting, a support for the molded material below the cutting machine, and a limit switch that operates when the molded material reaches a certain length are provided on the floor surface below this support, and this limit switch is activated. Then, the supporting tool automatically clamps the molded material, and the cutting machine is activated to cut the molded material and arrange the molded material in parallel. Manufacturing equipment for plate-shaped molded materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21031284A JPS6187805A (en) | 1984-10-05 | 1984-10-05 | Production of al porous plate material by roll forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21031284A JPS6187805A (en) | 1984-10-05 | 1984-10-05 | Production of al porous plate material by roll forming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187805A JPS6187805A (en) | 1986-05-06 |
| JPH0148324B2 true JPH0148324B2 (en) | 1989-10-18 |
Family
ID=16587325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21031284A Granted JPS6187805A (en) | 1984-10-05 | 1984-10-05 | Production of al porous plate material by roll forming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6187805A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7090955B2 (en) * | 2020-11-06 | 2022-06-27 | 燕山大学 | Rolled steel strip forming equipment based on semi-solid metal powder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4841801A (en) * | 1971-09-26 | 1973-06-19 | ||
| JPS508707A (en) * | 1973-05-28 | 1975-01-29 | ||
| JPS5288208A (en) * | 1976-01-19 | 1977-07-23 | Nippon Dia Clevite Co | Method of producing porous plate |
| JPS5442331A (en) * | 1977-07-15 | 1979-04-04 | N Proizv Obiedeinenie Tekunoro | Flux for centrifugal casting of bimetal pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5893799U (en) * | 1981-12-21 | 1983-06-25 | 株式会社東芝 | Sintering tray |
-
1984
- 1984-10-05 JP JP21031284A patent/JPS6187805A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4841801A (en) * | 1971-09-26 | 1973-06-19 | ||
| JPS508707A (en) * | 1973-05-28 | 1975-01-29 | ||
| JPS5288208A (en) * | 1976-01-19 | 1977-07-23 | Nippon Dia Clevite Co | Method of producing porous plate |
| JPS5442331A (en) * | 1977-07-15 | 1979-04-04 | N Proizv Obiedeinenie Tekunoro | Flux for centrifugal casting of bimetal pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187805A (en) | 1986-05-06 |
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