JPS5931802A - Sintering furnace for powder metallurgy - Google Patents
Sintering furnace for powder metallurgyInfo
- Publication number
- JPS5931802A JPS5931802A JP14088582A JP14088582A JPS5931802A JP S5931802 A JPS5931802 A JP S5931802A JP 14088582 A JP14088582 A JP 14088582A JP 14088582 A JP14088582 A JP 14088582A JP S5931802 A JPS5931802 A JP S5931802A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- layers
- heat insulation
- heat insulating
- sintering furnace
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
（イ） 産業−にの利用分野
この発明は炭化タングクテン等を生成分とした超硬合金
などの粉末冶金法による焼結硬質合金の製造に用いる焼
結炉に関するものである。[Detailed description of the invention] (a) Field of application in industry This invention relates to a sintering furnace used for manufacturing sintered hard alloys such as cemented carbide using a powder metallurgy method using tungsten carbide as a generating component. be.
（ハ） ？７し来技術
粉末冶金法による焼結硬質合金の製造に用いる焼結炉は
、真空槽の内部に断熱層で囲んだ焼結室を設け、その焼
結室内にワーク支持棚を設置し、その支持棚の曲りにヒ
ータを配置した構造になっており、上記の断熱層は、炭
素質繊維又は炭素質モノフィラメントのブロックによっ
て構成された単一から成るものである。(c) ? 7 Traditional technology The sintering furnace used to manufacture sintered hard alloys using the powder metallurgy method has a sintering chamber surrounded by a heat insulating layer inside a vacuum chamber, a workpiece support shelf is installed inside the sintering chamber, and It has a structure in which a heater is arranged at the bend of the support shelf, and the above-mentioned heat insulating layer is made of a single block of carbon fiber or carbon monofilament.
に）発明によって解決しようとする問題点」〕記の構造
をもった焼結炉の真空槽の圧力は、焼結室の外側の方が
真空度が高くなるように真空引きされるのが普通であり
、そのため焼結室内側の圧力Ｐｗの方が外側の圧力Ｐｉ
より大（Ｐｗ＞Ｐｉ ）になる。The pressure in the vacuum chamber of a sintering furnace with the structure described in "Problems to be Solved by the Invention" is normally evacuated so that the degree of vacuum is higher on the outside of the sintering chamber. Therefore, the pressure Pw inside the sintering chamber is higher than the pressure Pi outside.
becomes larger (Pw>Pi).
一方、焼結時にはワークに混入されているバライン専の
潤滑剤、その他の不純物（０２、Ｈ＋ 、Ｎ２．１＋２
０）ワーク自体から発生する金属成分（Ｃｏ、Ｎｉ 、
Ｃｕ、Ｆｅ ）等を含んだ蒸気が焼結室内で発生する。On the other hand, during sintering, lubricants exclusively for baline and other impurities (02, H+, N2.1+2) are mixed into the workpiece.
0) Metal components generated from the work itself (Co, Ni,
Steam containing Cu, Fe, etc. is generated in the sintering chamber.
この蒸気は上述の圧力差によって断熱層を通過して焼結
室外へ排気されるが、その通過途中で断熱材に付着し、
その付着物が次回の新たなワークの情結処叩の際に有害
なガスきなり、そのガスがワークの焼結に影響を及はし
、ワークの品質を劣化させる問題がある。Due to the pressure difference mentioned above, this steam passes through the insulation layer and is exhausted outside the sintering chamber, but during its passage, it adheres to the insulation material.
There is a problem that the deposits emit a harmful gas when a new workpiece is processed next time, and the gas affects the sintering of the workpiece, degrading the quality of the workpiece.
なお、焼結炉には、予めパラフィン等の潤滑剤を除去し
たワークを焼結４−るものと、潤滑剤を除去（〜ないで
そのま５焼結するものとがあるが、いずれの場合も１−
１記の問題のために従来はしはしば断熱層を取替える必
要があった。しかし、断熱層は高価であると共に取替え
作業に時間がかかる等の問題がある。There are two types of sintering furnaces: those that sinter the workpiece from which lubricants such as paraffin have been removed in advance, and those that sinter the workpiece without removing the lubricant. Mo1-
In the past, it was often necessary to replace the heat insulating layer due to the problem mentioned above. However, the heat insulating layer is expensive and requires time to replace.
この発明はこのような問題を解消した焼結炉を提供４−
ることを目的としている。This invention provides a sintering furnace that solves these problems4-
The purpose is to
（ホ） 問題点を解決するための手段
この発］υ目４、ワークから発生ｑネ金属成分の蒸気は
断ｐノ〜層の内面に近い部分に４８１着し、パラフィン
等の潤θＥ剤は外ｍ１に近い部分（比較的低温部分）に
刊行する傾向にあるこきにかんがみ、断熱層を取替え自
在の複数層に形成し、金属成分の付着し坊い内面側の断
熱層を適宜取替えるようにし、更に轡数層に９離〔、た
層間に潤滑剤のフィルターを挿入することにより、内面
側の断熱層の取替えのみならす、フィルターも自由に取
替え得るようにしたものである。(e) Means to solve the problem] 4. The vapor of the metal component generated from the workpiece is deposited on the part near the inner surface of the layer, and the moisture θE agent such as paraffin is In view of the tendency for publications to be published near the outside m1 (relatively low temperature area), the heat insulating layer is formed into multiple replaceable layers, and the heat insulating layer on the inner side, where metal components are less likely to adhere, is replaced as appropriate. Furthermore, by inserting lubricant filters between the layers, which are spaced 9 times apart, it is possible not only to replace the inner heat insulating layer but also to freely replace the filter.
（へ） 実 施 例
第１図及び第２図に示す焼結炉は、断熱層１の構成を除
いては、従来のものと同様である。(f) Example The sintering furnace shown in FIGS. 1 and 2 is the same as the conventional one except for the structure of the heat insulating layer 1.
即ち、真空槽２を台脚３上に固定し、その一方に開閉自
在の蓋４を設け、槽２の壁に冷却水又は１１υ水の通路
５を設けている。真空槽２の内部には、断熱層１によっ
て構成された焼結室６が設けられている。焼結室６の内
部にはワークａの支持棚７を設け、その支持棚７の周り
にヒータ８を設けており、そのヒータ８を槽外の電源９
に接続している。That is, a vacuum tank 2 is fixed on a stand leg 3, a lid 4 that can be opened and closed is provided on one side, and a passage 5 for cooling water or 11υ water is provided in the wall of the tank 2. A sintering chamber 6 made up of a heat insulating layer 1 is provided inside the vacuum chamber 2 . A support shelf 7 for the workpiece a is provided inside the sintering chamber 6, and a heater 8 is provided around the support shelf 7. The heater 8 is connected to a power source 9 outside the tank.
is connected to.
１−記の真空槽２は、吸引口１０によって真空源に接続
され、焼結室６内の圧力Ｐｗの方が焼結室６外の圧力Ｐ
ｉより大きくなるよう真空引きされる。The vacuum chamber 2 described in 1- is connected to a vacuum source through a suction port 10, and the pressure Pw inside the sintering chamber 6 is higher than the pressure P outside the sintering chamber 6.
It is evacuated so that it becomes larger than i.
上記の断熱層１は内外三胴１ａ、Ｉｂに形成され、レー
ル１１によって抜き差し自在に保持される。The above-mentioned heat insulating layer 1 is formed on the inner and outer cylinders 1a and Ib, and is held by rails 11 so as to be freely inserted and removed.
第３図は断熱層１の拡大図であり、各層ｌ ａ 、 ｌ
Ｉ）はスチール枠１２の片面に炭素質繊維、炭素質モ
ノフィラメント等からなる断熱材１３を重ね、金唄線１
４によって一体化したものてあり、両層１ａ。FIG. 3 is an enlarged view of the heat insulating layer 1, with each layer la, l
In I), a heat insulating material 13 made of carbon fiber, carbon monofilament, etc. is layered on one side of the steel frame 12, and the Kinbai wire 1 is
4, and both layers 1a.
１１）の間に１商当な間隙を設けた状態での全厚さＷか
降来の一枚分の断熱層と同程度の厚さになるように形成
される。11) is formed so that the total thickness W with a gap of 1 cm between them is approximately the same as the thickness of one heat insulating layer.
１・記の構造は、予め潤滑剤を除去したのちに溶結する
情貼炉の場合に使用され、主として内側断熱層１３に金
属成分が４８１着し易いのて、内Ｑ！ＩＩ断熱Ｉｌ′４
１３のみを取替えるか、又は内（ＩＩ！ＩＩ断熱［１ａ
の取替え＠麿を外側断熱層１１〕よりも大にする。The structure described in 1. is used in the case of a furnace in which lubricant is removed before welding, and metal components tend to adhere to the inner heat insulating layer 13. II insulation Il'4
Either replace only 13 or inside (II!II insulation [1a
Replacement @Maro is made larger than the outer insulation layer 11].
そのため、全てのＩＷｉ熱ｉ４を取替える必要がないの
でコストを低減できる。Therefore, it is not necessary to replace all IWi thermal i4s, so costs can be reduced.
すｙにその効果を助長するため内…１１断熱層１ａを第
４図に示すように炭素質繊維、炭素質モノフィラメント
等の断熱材１３をブロック状に固めた構造のものとし、
ｉＱ述のスチール枠１２や金属線１４を省略してもよい
。In order to further enhance this effect, the inner heat insulating layer 1a has a structure in which heat insulating material 13 such as carbon fiber or carbon monofilament is solidified into blocks as shown in FIG.
The steel frame 12 and metal wire 14 described in iQ may be omitted.
第４図に示したものは、内外断熱層ｌａ、ｉｂの間にこ
れらと同様の素材で成るフィルター１５をレール等によ
り抜差し自在に挿入したものであり、パラフィン等の潤
滑剤はこのフィルター１５に捕捉される。したがって、
この構造によると、内側断熱層１ａに金属成分が付着し
、フィルター１５に潤滑剤が伺着するから、暁結前に潤
滑剤の除去を行なわすそのま５焼結する焼結炉の囁合に
適する。In the filter shown in FIG. 4, a filter 15 made of the same material as these is inserted between the inner and outer heat insulating layers la and ib so that it can be inserted and removed freely by means of a rail, etc., and a lubricant such as paraffin is inserted into this filter 15. Captured. therefore,
According to this structure, metal components adhere to the inner heat insulating layer 1a and lubricant adheres to the filter 15, so the lubricant is removed before sintering. suitable for
なお、す、上は断熱層を二層に構成した例について説明
したが、二層以」−で構成される場合があり、またフィ
ルターはそれらの層間の適宜位置に挿入される。更に、
各断熱層の素材又はその構成は上述のものに限定される
ものではない。Incidentally, although an example in which the heat insulating layer is composed of two layers has been described above, the heat insulating layer may be composed of two or more layers, and the filter is inserted at an appropriate position between these layers. Furthermore,
The material or structure of each heat insulating layer is not limited to those described above.
（ト） 効 果
以トのとおりであるから、「特許請求の範囲」第１項に
記載の発明によると、金属成分の付着し易い内側のみを
取替えるか、又はその取替え頻度を外側のものより大に
することにより、断熱層全部を取替える必要がなく、部
分的な取替えてよいので非常に経済的である。また、断
熱層は薄くて軽量になるので交換作業が容易になる。(g) Effects are as follows, so according to the invention described in paragraph 1 of the "Claims", only the inner side, to which metal components tend to adhere, is replaced, or the replacement frequency is changed more frequently than the outer side. By increasing the size, it is not necessary to replace the entire heat insulating layer, but only a portion can be replaced, which is very economical. Additionally, the heat insulating layer is thin and lightweight, making it easier to replace.
また第２項に記載の発明によると、−１−記の効果に如
えて、４ｔ［」滑印１を断熱層以外のフィルターによ−
〕て捕１１１：てきるから、潤／１”１削の（＝１着に
よる断熱層（ハ１反替え１［イ１１１３を′ｐ ｆλく
ずろこ々が−ｒきる。Further, according to the invention described in item 2, by virtue of the effect described in -1-, the 4t ['' slide mark 1 is filtered by a filter other than the heat insulating layer.
] Te capture 111: Since it comes, moisture / 1" 1 cut (= insulation layer by 1 place)
第１ トｌは慎結炉の縦断ｆＩｌｌｌ而１゛に１、第２
図はその縦ｉ１ｉ １Ｆ而ド）、第３図は断熱層の一部
拡大断面図、第４図は１すｉ熱層のイ（１シの例を示す
一部拡大ＩＵｉ面図である。。
１ 断熱層、１ａ 内側本熱層、１ｂ・・外伺）断熱層
、２−．１＜空槽、６・暁結室、１１・・・レール、１
３１ＩＩＴ熱材、１ｂ ・潤渭剤フィルター。
１′：ｒ計量願人 住友電気工業株式会社同 代理人
鎌 １）文 二
第２図The first toll is the longitudinal section of the shingle furnace fIllll, and the second
3 is a partially enlarged sectional view of the heat insulating layer, and FIG. 4 is a partially enlarged sectional view showing an example of the heat layer 1. 1 Heat insulation layer, 1a Inner main heat layer, 1b...outer) Heat insulation layer, 2-. 1<Empty tank, 6. Dawning chamber, 11...Rail, 1
31IIT heat material, 1b ・Moisturizing agent filter. 1': rMeasuring applicant Sumitomo Electric Industries Co., Ltd. Agent Kama 1) Text 2 Figure 2
Claims (1)
粉末冶金用焼結炉において、］−記断熱層を取替え自在
の複数層に形成したことを特徴とする粉末冶金用焼結炉
つ （２） 東空槽内部に断熱層によって焼結室を設けた粉
末冶金用焼結炉において、上記断熱層を取替え自在の複
数層に形成し、層間の間隙に潤滑剤フィルターを取替え
自在に挿入したことを特徴とする粉末冶金用焼結炉。[Scope of Claims] () A sintering furnace for powder metallurgy in which a sintering chamber is provided inside a vacuum chamber by a heat insulating layer, which is characterized in that the heat insulating layer is formed into a plurality of replaceable layers. Sintering Furnace for Metallurgy (2) In a sintering furnace for powder metallurgy in which a sintering chamber is provided inside the open tank by a heat insulating layer, the heat insulating layer is formed into multiple replaceable layers, and a lubricant is applied to the gaps between the layers. A sintering furnace for powder metallurgy characterized by a replaceably inserted filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14088582A JPS5931802A (en) | 1982-08-11 | 1982-08-11 | Sintering furnace for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14088582A JPS5931802A (en) | 1982-08-11 | 1982-08-11 | Sintering furnace for powder metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5931802A true JPS5931802A (en) | 1984-02-21 |
| JPS6242961B2 JPS6242961B2 (en) | 1987-09-10 |
Family
ID=15279034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14088582A Granted JPS5931802A (en) | 1982-08-11 | 1982-08-11 | Sintering furnace for powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5931802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295303A (en) * | 1985-06-24 | 1986-12-26 | Shimadzu Corp | Tight box for sintering furnace |
| CN112658250A (en) * | 2020-12-04 | 2021-04-16 | 广州达运医疗科技有限公司 | Sintering device for powder metallurgy parts |
-
1982
- 1982-08-11 JP JP14088582A patent/JPS5931802A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295303A (en) * | 1985-06-24 | 1986-12-26 | Shimadzu Corp | Tight box for sintering furnace |
| CN112658250A (en) * | 2020-12-04 | 2021-04-16 | 广州达运医疗科技有限公司 | Sintering device for powder metallurgy parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6242961B2 (en) | 1987-09-10 |
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