JPH01226772A - Supporting body for degreasing/sintering - Google Patents
Supporting body for degreasing/sinteringInfo
- Publication number
- JPH01226772A JPH01226772A JP63050786A JP5078688A JPH01226772A JP H01226772 A JPH01226772 A JP H01226772A JP 63050786 A JP63050786 A JP 63050786A JP 5078688 A JP5078688 A JP 5078688A JP H01226772 A JPH01226772 A JP H01226772A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- degreasing
- ferrite powder
- green body
- support
- 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
- 238000005245 sintering Methods 0.000 title claims abstract description 25
- 238000005238 degreasing Methods 0.000 title claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 abstract description 9
- 238000001746 injection moulding Methods 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229910001047 Hard ferrite Inorganic materials 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 229910001035 Soft ferrite Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000009931 harmful effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Furnace Charging Or Discharging (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はフェライト粉末とバインダーとの混合物を射出
成形してなるグリーン体を脱脂・焼結する際に用いられ
る支持体に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a support used when degreasing and sintering a green body formed by injection molding a mixture of ferrite powder and a binder.
従来、フェライトの焼結体はフェライト粉末にポリビニ
ルアルコールなどの水溶液物質を数パーセント混合させ
、顆粒化した粉末をプレス法によって成形した後、脱脂
・焼結して成形物を得る方法が一般に行なわれている。Conventionally, ferrite sintered bodies have been produced by mixing ferrite powder with a few percent of an aqueous substance such as polyvinyl alcohol, forming the granulated powder using a press method, and then degreasing and sintering it to obtain a molded product. ing.
しかしこのような方法では三次元でかつ複雑な形状を有
する成形物を得ることはできず、焼結体を２次加工する
ことにより複雑な形状の成形物を得る試みがなされてい
たが、加工時に欠けや割れが発生し２次加工にも限度が
あった。However, with this method, it is not possible to obtain a molded product with a three-dimensional and complicated shape, and attempts have been made to obtain a molded product with a complex shape by secondary processing of the sintered body, but the processing Chips and cracks sometimes occurred, and there were limits to secondary processing.
そのため、最近では複雑な三次元の形態を有する成形物
を得るには、射出成形法によってフェライトグリーン体
を得る方法が開発されている。この射出成形法で複雑な
形状の７１ライトグリ一ン体を得るには、ワックススチ
レン系重合体、アクリル系重合体などの各種高分子重合
体の低重合物１０〜３０重間％をフェライト粉末に混合
させた混合物を射出成形機を使って金型中に充填するこ
とによって成形している。このような複’１１ ｆ、Ｎ
三次元の成形体は従来アルミナなどの無機粉末中で脱脂
を行っているが、成形体の表面が脱脂時に肌荒れをおこ
すという問題があった。Therefore, recently, in order to obtain a molded product having a complicated three-dimensional shape, a method of obtaining a ferrite green body by injection molding has been developed. In order to obtain a complex-shaped 71 light green body using this injection molding method, 10 to 30% by weight of low polymers of various high molecular weight polymers such as wax styrene polymers and acrylic polymers are made into ferrite powder. The mixed mixture is molded by filling it into a mold using an injection molding machine. Such multiple '11 f, N
Conventionally, three-dimensional molded bodies are degreased in inorganic powder such as alumina, but there is a problem in that the surface of the molded body becomes rough during degreasing.
この場合、表面に複ｉな模様、凹凸などを有する板状体
においては、仝休をアルミナなどの無機粉末中に埋める
ことなく、板状体の一面をアルミす焼結板の支持体上に
載置させ、脱脂を行った俊、そのまま焼結を行うことが
行なわれているが、（の際、脱脂時のシフ温速度を遅く
し、しかも温度コントロールを厳密に実施しないならば
、成形体にフクレや有害な変形が発生する。In this case, in the case of a plate-shaped body having a complex pattern or unevenness on its surface, one side of the plate-shaped body is placed on a support of an aluminum sintered plate without burying the rest in inorganic powder such as alumina. It is common practice to sinter the molded product after it has been placed and degreased, but if the sifting temperature rate during degreasing is slowed down and the temperature is not strictly controlled, Blisters and harmful deformities occur.
これを解決するため本発明者らは先に、脱脂時および焼
結時に異なる気孔率を有する支持体を用いることにより
、脱脂時間が短縮され、かつ脱脂時の変形も防止され、
寸法精度にすぐれた焼結体が得られる方法を提案した（
特願昭６２−２７５６４４号）。In order to solve this problem, the present inventors first used supports with different porosity during degreasing and sintering, thereby shortening the degreasing time and preventing deformation during degreasing.
We proposed a method for obtaining sintered bodies with excellent dimensional accuracy (
(Japanese Patent Application No. 62-275644).
しかし、脱脂時と焼結時で異なった支持体を用いるため
支持体上の脱脂体を別の支持体上に移しかえる必要があ
り、工程が傾雑になるとともに脱脂体が破損しやすいと
いう問題があり、特にフェライト粉末を用いたグリーン
体では脱脂体が破損しやすくかつ焼結時の反り、変形を
防止することは困難であった。However, since different supports are used during degreasing and sintering, it is necessary to transfer the degreased body on one support to another, which makes the process complicated and causes the degreased body to be easily damaged. In particular, in green bodies using ferrite powder, the degreased bodies are easily damaged and it is difficult to prevent warping and deformation during sintering.
本発明はこれらの欠点を解消しフェライト粉末とバイン
ダーとの混合物を射出成形してなるグリーン体を脱脂焼
結させる際、脱脂後、脱脂体を別の支持体上に移しかえ
ることなく焼結が実施でき、かつ焼結時に反り、ねじれ
などの変形が抑ルリされる支持体を提供することを目的
とする。The present invention solves these drawbacks, and when degreasing and sintering a green body made by injection molding a mixture of ferrite powder and a binder, sintering can be carried out without transferring the degreased body to another support after degreasing. It is an object of the present invention to provide a support that can be used and that can suppress deformation such as warping and twisting during sintering.
上記の目的を達成するために、本発明の脱脂・焼結用支
持体は、平均粒径が１５０〜２５０μｍで、かつ２５０
メツシュより小さい粒子が３５重艶％以下のフェライト
粉を用いて、成形焼結してなる。In order to achieve the above object, the support for degreasing and sintering of the present invention has an average particle size of 150 to 250 μm and 250 μm.
It is formed by molding and sintering using ferrite powder with particles smaller than a mesh having a gloss of 35% or less.
（＾）フェライト粉末
本発明の支持体を作製するためのフェライト粉末は軟質
フェライト、または硬質フェライトであり、軟質フェラ
イトとしてはマンガン−亜鉛系、ニッケルー亜鉛系、銅
−亜鉛系、マグネシウム−亜鉛系があげられ、また硬質
フェライトとしては、バリウム系フェライト、コバルト
系フェライト、ストロンチウム系フェライトがあげられ
る。これらフェライトの平均粒径は１５０〜２５０μｍ
であり、１５０〜２３０μｍが好ましく、特に １７０
〜２３０μｍが最適である。平均粒径が１５０μｍ未満
のフェライト粉末を使用した支持体を使用すると１、脱
脂時にグリーン体が固着し、焼結時にクラックが発生し
たり、変形したりする。一方、平均粒径が２５０μｍを
越えるフェライト粉末を用いた支持体を使用すると、脱
脂時にグリーン体に変形が発生する。(^) Ferrite powder The ferrite powder for producing the support of the present invention is soft ferrite or hard ferrite. Examples of the soft ferrite include manganese-zinc, nickel-zinc, copper-zinc, and magnesium-zinc. Hard ferrites include barium ferrite, cobalt ferrite, and strontium ferrite. The average grain size of these ferrites is 150 to 250 μm
and preferably 150 to 230 μm, especially 170 μm
~230 μm is optimal. If a support using ferrite powder with an average particle size of less than 150 μm is used, the green body will stick during degreasing and cracks or deformation will occur during sintering. On the other hand, if a support using ferrite powder with an average particle size exceeding 250 μm is used, the green body will be deformed during degreasing.
また、フェライト粉末の２５０メツシュより小さい粒子
の重量は３５重量％以下であり、好ましくは３０重量％
以下であり、特に２５重拒％以下が最適である。フェラ
イト粉末の２５０メツシュより小さい粒子の重量が３５
ｆｆｌｆｉ１％を越えたフェライト粉末によってつくら
れた支持体によって、フェライト粉末とバインダーとの
混合物を（ト）出成形してなるグリーン体を脱脂・焼結
すると、脱脂・焼結の際反りや有害な変形が発生する。Further, the weight of particles smaller than 250 meshes of ferrite powder is 35% by weight or less, preferably 30% by weight.
or less, and particularly preferably 25% or less. The weight of particles smaller than 250 mesh of ferrite powder is 35
When degreasing and sintering a green body made by molding a mixture of ferrite powder and binder using a support made of ferrite powder with fflfi exceeding 1%, warping and harmful effects may occur during degreasing and sintering. Deformation occurs.
（８）支持体の製造
本発明の脱脂焼結用支持体を製造するには、前記フェラ
イト粉末１００＠ｆｆ１部に対し３〜１０ｆｆｌ吊部の
ポリビニルアルコール、カルボキシメチルセルロースな
どの結着剤を添加し、プレス法で２００〜１５０ＯＮ９
／ｃｄの圧力゛Ｃ加圧し、支持体用グリーン体を成形し
、次いでグリーン体を焼結することによってつくられる
。この場合、支持体用グリーン体の焼結は昇温速度３０
〜２００℃／ＨＲの条件で、最８ Ｑ Ｉ！ｔ １１０
０〜１５００℃まで加熱することにより実施される。グ
リーン体の形状としては厚さ２〜２０Ｉｉ／ｌの板状体
であり、円根状、箱型などの形状であってもよい。この
ようにして得られた支持体の気孔率は１０〜６０％であ
り、特に１５〜５０％が好適である。気孔率が１０％未
満では脱脂時に有害な変形が発生し、一方６０％を越え
た場合は焼結時にクラックが発生したり、反りが発生し
たりする。(8) Production of support To produce the support for degreasing and sintering of the present invention, 3 to 10 ffl of a binder such as polyvinyl alcohol or carboxymethyl cellulose is added to 1 part of the ferrite powder 100@ff. , 200-150ON9 by pressing method
It is produced by applying a pressure of /cd to form a green body for the support, and then sintering the green body. In this case, the green body for the support is sintered at a temperature increase rate of 30
Under conditions of ~200℃/HR, up to 8 QI! t 110
It is carried out by heating to 0-1500°C. The shape of the green body is a plate-like body having a thickness of 2 to 20 Ii/l, and may have a root-like shape, a box-like shape, or the like. The support thus obtained has a porosity of 10 to 60%, preferably 15 to 50%. If the porosity is less than 10%, harmful deformation will occur during degreasing, while if it exceeds 60%, cracks or warping will occur during sintering.
（Ｃ）フェライト粉末含有射出成形グリーン体上記フェ
ライト粉末を焼結してなる支持体を用いて脱脂・焼結さ
れる、射出成形法により成形されたグリーン体は平均粒
径が０．１〜１０ｕＴｒＬのフェライト粉末およびエチ
レン系重合体、スヂレン系重合体、エチレン−酢酸ビニ
ル共重合体、アクリル系共重合体など、セラミックス材
料を混合し、焼結物質を製造する分野において広く使わ
れているバインダーの混合物よりなり、フェライト粉末
１００重量部に対するバインターの混合割合は５〜３０
重汀部である。フェライト粉末としては、前記支持体用
フェライト粉末として用いられる軟質フェライト、或は
硬質フェライトであれば、特に制限はない。(C) Injection molded green body containing ferrite powder The green body molded by the injection molding method, which is degreased and sintered using a support formed by sintering the above ferrite powder, has an average particle size of 0.1 to 10 uTrL. A binder widely used in the field of manufacturing sintered materials by mixing ceramic materials such as ferrite powder, ethylene polymer, styrene polymer, ethylene-vinyl acetate copolymer, and acrylic copolymer. The mixing ratio of binder to 100 parts by weight of ferrite powder is 5 to 30 parts by weight.
This is Shigebe. The ferrite powder is not particularly limited as long as it is soft ferrite or hard ferrite used as the ferrite powder for the support.
以下、実施例、比較例を示して本発明の詳細な説明する
。Hereinafter, the present invention will be explained in detail by showing Examples and Comparative Examples.
各個における気孔率は、ＪＩＳ−Ｒ２２０５によって測
定した。The porosity of each piece was measured according to JIS-R2205.
また、各個において使用した、フェライト粉末およびバ
インダーの混合物よりなる成形体は次のようにして製造
した。Furthermore, the molded bodies made of a mixture of ferrite powder and binder used in each piece were manufactured in the following manner.
すなわち、平均粒径が１．０μｍのニッケ−亜鉛フェラ
イト １００重量部に対し、平均分子聞が約２０万のポ
リアクリル酸ブチル１０重楢部、ジブチルフタレート２
，０重量部、およびステアリン酸１．０重量部からなる
混合物を、径３０Ｍの二軸押出機を用い、１２０℃でＵ
練しながらペレットをＩ Ｂした。得られたペレットを
型締力が１００トンの射出成形層を用いで、厚さが５ａ
ｍ、外径が５０＋ｍ、内径が２０ｍの円環板状の成形体
を製造して用いた。That is, to 100 parts by weight of nickel-zinc ferrite with an average particle diameter of 1.0 μm, 10 parts by weight of butyl polyacrylate with an average molecular weight of about 200,000, and 2 parts by weight of dibutyl phthalate.
, 0 parts by weight of stearic acid, and 1.0 parts by weight of stearic acid were heated to
The pellets were subjected to IB while kneading. The obtained pellets were molded using an injection molding layer with a mold clamping force of 100 tons and a thickness of 5 mm.
An annular plate-shaped molded body having an outer diameter of 50 m and an inner diameter of 20 m was manufactured and used.
実施例１〜４．比較例１〜４
平均粒径、２５０メツシュより小さい粒子の重量％が異
なる各種フェライト粉末を用いて、脱脂・焼結用支持体
をつくった。Examples 1-4. Comparative Examples 1 to 4 Supports for degreasing and sintering were made using various ferrite powders having different average particle diameters and different weight percentages of particles smaller than 250 mesh.
支持体の製造方法は、フェライト粉末１００重４部に対
し、平均分子量７万のポリビニルアルコール１重ａ部お
よび水３重９部を添加し、ニーダで混練した後、粉砕し
、１００トンのプレス機を用い、圧力１００ＯＮ９／ｃ
ｒｉで、直径６０ ｔｔｔａ 、厚み７ａｍの円板状支
持体のグリーン体を成形した。このグリーン体を５０℃
／ｈｒの速度で１４ｏｏ℃まで昇温した後放冷し、脱脂
・焼結用支持体を杓、それぞれの気孔率を測定した。The manufacturing method for the support is as follows: To 100 parts by weight of ferrite powder, 1 part by weight of polyvinyl alcohol with an average molecular weight of 70,000 and 9 parts by part by weight of water are added, kneaded in a kneader, pulverized, and pressed in a 100 ton press. Using a machine, pressure 100ON9/c
A green body of a disc-shaped support having a diameter of 60 tta and a thickness of 7 am was molded using RI. This green body is heated to 50℃
After raising the temperature to 140° C./hr at a rate of 140° C., the support was allowed to cool, and the porosity of each support was measured.
また、アルミナ粉末を用い、同様な方法で支持体のグリ
ーン体を成形し、１６００℃まで昇温焼成した。Further, a green body of a support was molded using alumina powder in the same manner and fired at an elevated temperature of 1600°C.
このようにして得られたそれぞれの脱脂・焼結用支持体
上に、前記射出成形した円環板状の成形体を載置し、大
気中、１０℃／ｈｒの速度で５００℃まで昇温し、１０
時間保持した後、６０℃／ｈ「の速度でイれぞれの温度
まで昇温し、１ｈｒ保持して脱脂・焼成した後、空温ま
で放冷し、変形状態を調べた。結果を第１表に一括して
示す。The injection-molded annular plate-shaped body was placed on each of the degreasing and sintering supports obtained in this way, and the temperature was raised to 500°C at a rate of 10°C/hr in the atmosphere. 10
After holding for an hour, the temperature was raised to each temperature at a rate of 60°C/h, held for 1 hour to degrease and bake, and then allowed to cool to air temperature to examine the deformation state. All are shown in Table 1.
以 下 余 白
〔発明の効果〕
以上述べたように本発明に係る支持体ｔよフェライト粉
末とバインダーの註合物を射出成形してなるグリーン体
を効率よく脱脂・焼結することカーできる。特に従来、
焼結時の変形によって歩留りの低かったフェライト焼結
製品の歩留りを高めることができる優れたしのである。Margins [Effects of the Invention] As described above, it is possible to efficiently degrease and sinter a green body formed by injection molding a mixture of ferrite powder and a binder using the support according to the present invention. Especially conventionally,
This is an excellent material that can increase the yield of ferrite sintered products, which had a low yield due to deformation during sintering.
Claims (1)
り小さい粒子が３５重量％以下のフェライト粉を用いて
、成形焼結してなることを特徴とする脱脂・焼結用支持
体。A support for degreasing and sintering, characterized in that it is formed and sintered using ferrite powder having an average particle size of 150 to 250 μm and containing 35% by weight or less of particles smaller than 250 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63050786A JPH01226772A (en) | 1988-03-04 | 1988-03-04 | Supporting body for degreasing/sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63050786A JPH01226772A (en) | 1988-03-04 | 1988-03-04 | Supporting body for degreasing/sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01226772A true JPH01226772A (en) | 1989-09-11 |
Family
ID=12868499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63050786A Pending JPH01226772A (en) | 1988-03-04 | 1988-03-04 | Supporting body for degreasing/sintering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01226772A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532999U (en) * | 1991-10-02 | 1993-04-30 | ブラザー工業株式会社 | Tray for degreasing and sintering of metal powder compacts |
-
1988
- 1988-03-04 JP JP63050786A patent/JPH01226772A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532999U (en) * | 1991-10-02 | 1993-04-30 | ブラザー工業株式会社 | Tray for degreasing and sintering of metal powder compacts |
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