JP2500082Y2 - Continuous degreasing and sintering furnace - Google Patents
Continuous degreasing and sintering furnaceInfo
- Publication number
- JP2500082Y2 JP2500082Y2 JP1368691U JP1368691U JP2500082Y2 JP 2500082 Y2 JP2500082 Y2 JP 2500082Y2 JP 1368691 U JP1368691 U JP 1368691U JP 1368691 U JP1368691 U JP 1368691U JP 2500082 Y2 JP2500082 Y2 JP 2500082Y2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- degreasing
- cooling
- 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.)
- Expired - Lifetime
Links
Landscapes
- Powder Metallurgy (AREA)
- Tunnel Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、焼結とそれに先立つ脱
脂(脱ワックス)とを連続的に行うようにされた連続式脱
脂焼結炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous degreasing / sintering furnace adapted to continuously perform sintering and degreasing (dewaxing) prior to the sintering.
【０００２】[0002]
【従来の技術】この種の連続式脱脂焼結炉として図２に
示すものが広く用いられている。図２において符号１は
前室、２は脱脂室、３は焼結室、４は冷却室であって、
ワーク５(被処理物)を前室１を経て脱脂室２に装入し、
そこでワーク５を４００〜６００℃程度に加熱して脱脂
を行った後、焼結室３に移送して焼結を行い、冷却室４
において冷却した後に取り出すようにされている。な
お、図２において符号６は水冷壁構造とされている炉
体、７は脱脂室２のヒータ、８は焼結室３のヒータ、９
は各室の前後にそれぞれ設けられている扉、１０は冷却
室４内に設けられている冷却ファン、１１は炉体６内の
底部に設けられた一連のワーク搬送用の搬送装置であ
る。2. Description of the Related Art As a continuous degreasing and sintering furnace of this type, the one shown in FIG. 2 is widely used. In FIG. 2, reference numeral 1 is a front chamber, 2 is a degreasing chamber, 3 is a sintering chamber, 4 is a cooling chamber,
The work 5 (workpiece) is loaded into the degreasing chamber 2 through the front chamber 1,
Therefore, the work 5 is heated to about 400 to 600 ° C. for degreasing, then transferred to the sintering chamber 3 for sintering, and then cooled in the cooling chamber 4.
It is taken out after cooling at. In FIG. 2, reference numeral 6 is a furnace body having a water cooling wall structure, 7 is a heater for the degreasing chamber 2, 8 is a heater for the sintering chamber 3, and 9 is a heater.
Is a door provided before and after each chamber, 10 is a cooling fan provided in the cooling chamber 4, and 11 is a transfer device for transferring a series of works provided at the bottom of the furnace body 6.
【０００３】[0003]
【考案が解決しようとする課題】ところで、上記従来の
炉においては、脱脂室２における脱脂工程が完了してワ
ーク５を焼結室３に移送した後には、新たなワーク５を
脱脂室２に装入するに先立って脱脂室２内の温度を２０
０℃程度となるまで下げる必要がある。これは、脱脂室
２内が高温のままで新たなワーク５を装入した場合に
は、そのワーク５が急速に加熱されてしまって変形や割
れ、あるいは膨張等の不具合を生じる恐れがあるからで
ある。In the conventional furnace described above, after the degreasing process in the degreasing chamber 2 is completed and the work 5 is transferred to the sintering chamber 3, a new work 5 is placed in the degreasing chamber 2. The temperature inside the degreasing chamber 2 should be adjusted to 20 before loading.
It is necessary to lower the temperature to about 0 ° C. This is because when a new work 5 is loaded while the inside of the degreasing chamber 2 is still at a high temperature, the work 5 may be heated rapidly, causing defects such as deformation, cracking, or expansion. Is.
【０００４】ところが、上記従来の炉には脱脂室２を冷
却するための格別の手段が備えられておらず、炉内に冷
却ガスを導入し、自然対流および炉体６の水冷壁によっ
て脱脂室２の温度が自然に低下することを待つのみであ
った。このため、従来においては、脱脂工程完了後に新
たなワーク５を脱脂室２に装入するまでの待機時間が長
くかかり、このために、その待機時間も含む脱脂工程で
の所要時間が、焼結室３における焼結工程や冷却室４に
おける冷却工程での所要時間に比して長くなっており、
このことが全工程のサイクルタイムの短縮を阻む一因と
なっていた。However, the conventional furnace is not provided with any special means for cooling the degreasing chamber 2, and cooling gas is introduced into the furnace to allow natural convection and the water cooling wall of the furnace body 6 to degrease the degreasing chamber. It only waited for the temperature of 2 to drop naturally. Therefore, conventionally, a long waiting time is required until the new work 5 is loaded into the degreasing chamber 2 after the degreasing process is completed. Therefore, the time required for the degreasing process, including the waiting time, is increased by the sintering. It is longer than the time required for the sintering process in the chamber 3 and the cooling process in the cooling chamber 4,
This has been one of the factors preventing the reduction of the cycle time of all processes.
【０００５】本考案は上記の事情に鑑みてなされたもの
で、脱脂工程での所要時間を短縮して全工程のサイクル
タイムを短縮し、以て生産性向上を図ることのできる連
続式脱脂焼結炉を提供することを目的としている。The present invention has been made in view of the above circumstances, and it is a continuous degreasing / baking system capable of shortening the time required for the degreasing process and shortening the cycle time of the whole process, thereby improving the productivity. The purpose is to provide a furnace.
【０００６】[0006]
【課題を解決するための手段】本考案は、前室、脱脂
室、焼結室、冷却室がその順に連設されている連続式脱
脂焼結炉であって、上記前室内に、上記脱脂室に冷却ガ
スを吹き込むための送風機を設けてなることを特徴とし
ている。The present invention is a continuous degreasing and sintering furnace in which a front chamber, a degreasing chamber, a sintering chamber, and a cooling chamber are connected in that order, and the degreasing chamber is provided in the front chamber. It is characterized in that a blower for blowing cooling gas into the chamber is provided.
【０００７】[0007]
【作用】脱脂室における脱脂工程が完了した後に、前室
に設けた送風機を運転して冷却ガスを脱脂室に吹き込み
つつ前室と脱脂室とにわたって強制循環させることによ
り、その冷却ガスによって脱脂室内を強制冷却する。After the degreasing process in the degreasing chamber is completed, the blower provided in the front chamber is operated to blow the cooling gas into the degreasing chamber and forcibly circulate the cooling gas between the front chamber and the degreasing chamber. To force cooling.
【０００８】[0008]
【実施例】以下、本考案の一実施例を図１を参照して説
明するが、図２に示した従来の炉と同一部分には同一符
号を付して詳細な説明は略す。本実施例の炉は、図２に
示した従来の炉における前室１内の上部に、軸流型の送
風機２０が設けられるとともに、その送風機２０の前部
側に、上下方向の向きを調節自在な風向調整板２１が設
けられた構成とされたものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1. The same parts as those of the conventional furnace shown in FIG. In the furnace of this embodiment, an axial flow type blower 20 is provided in the upper part of the front chamber 1 in the conventional furnace shown in FIG. 2, and the vertical direction is adjusted on the front side of the blower 20. The configuration is such that a free wind direction adjusting plate 21 is provided.
【０００９】この炉では、脱脂室２における脱脂が完了
してワーク５を焼結室３に移送したら、脱脂室２の前後
の扉９を開いて送風機２０を運転することにより、炉内
雰囲気ガスあるいは前室１内に導入した不活性ガスを冷
却ガスとしてそれを脱脂室２に向けて吹き出すようにな
っている。これにより、送風機２０から吹き出された冷
却ガスは、水冷壁構造とされている炉体６により冷却さ
れつつ図中の矢印で示すように脱脂室２に吹き込まれ、
その内部を通過した後、前室１側に吸引されて戻るよう
に強制循環するようになっている。In this furnace, when degreasing in the degreasing chamber 2 is completed and the work 5 is transferred to the sintering chamber 3, the doors 9 at the front and rear of the degreasing chamber 2 are opened and the blower 20 is operated so that the furnace atmosphere gas Alternatively, the inert gas introduced into the front chamber 1 is used as a cooling gas and blown out toward the degreasing chamber 2. As a result, the cooling gas blown from the blower 20 is blown into the degreasing chamber 2 as shown by the arrow in the figure while being cooled by the furnace body 6 having a water cooling wall structure.
After passing through the inside, it is forcibly circulated so as to be sucked and returned to the front chamber 1 side.
【００１０】これにより、脱脂室２の内部が速やかに冷
却され、脱脂室２の温度が６００℃程度から２００℃程
度に低下するまでの所要時間、すなわち新たなワーク５
を脱脂室２に装入するまでの待機時間を大幅に短縮する
ことができる。このため、上記の待機時間を含む脱脂工
程での所要時間を、焼結室３における焼結工程や冷却室
４における冷却工程での所要時間と同等程度あるいはそ
れ以下にまで短縮することができ、その結果、全工程の
サイクルタイムを短縮し得て生産性向上を図ることがで
きる。たとえば、図２に示した従来の炉においては、２
時間程度の待機時間を含めて脱脂工程に４時間程度を要
し、焼結工程および冷却工程にそれぞれ３時間程度を要
するので、全体のサイクルタイムは脱脂工程により決定
されて４時間程度となっていたが、上記実施例の炉によ
れば、待機時間が３０分程度で済むので脱脂工程が２時
間３０分程度に短縮され、その結果、全工程のサイクル
タイムは焼結工程や冷却工程により決定されて３時間程
度となり、１時間程度のサイクルタイム短縮を実現する
ことができる。As a result, the inside of the degreasing chamber 2 is quickly cooled, and the time required for the temperature of the degreasing chamber 2 to drop from about 600 ° C. to about 200 ° C.
It is possible to significantly reduce the waiting time until the degreasing chamber 2 is charged. Therefore, the time required for the degreasing process including the above waiting time can be shortened to the same level as or less than the time required for the sintering process in the sintering chamber 3 and the cooling process in the cooling chamber 4. As a result, the cycle time of all steps can be shortened and productivity can be improved. For example, in the conventional furnace shown in FIG.
The degreasing process requires about 4 hours including the waiting time, and the sintering process and the cooling process each take about 3 hours, so the total cycle time is about 4 hours as determined by the degreasing process. However, according to the furnace of the above embodiment, the waiting time is about 30 minutes, so the degreasing process is shortened to about 2 hours and 30 minutes, and as a result, the cycle time of all processes is determined by the sintering process and the cooling process. As a result, the cycle time becomes about 3 hours, and the cycle time can be shortened by about 1 hour.
【００１１】なお、上記実施例では、冷却ガスを水冷壁
構造の炉体６により冷却しつつ循環させるようにした
が、冷却ガスをより効率的に冷却するための冷却コイル
等を備えるようにしても良く、その場合は冷却時間をさ
らに短縮することが可能である。しかし、そのようにす
ることは、設備費の増大を招くばかりでなく、脱脂室２
の冷却に要する時間をさらに短縮しても、全工程のサイ
クルタイムは焼結工程や冷却工程での所要時間により決
定されてしまってそれ以上の生産性向上を実現できない
から無意味であり、通常は上記実施例のように炉体６の
水冷壁により冷却ガスを冷却することで十分である。In the above-described embodiment, the cooling gas is circulated while being cooled by the furnace body 6 having a water-cooled wall structure, but a cooling coil or the like for cooling the cooling gas more efficiently is provided. In that case, the cooling time can be further shortened. However, doing so not only leads to an increase in equipment costs, but also to the degreasing chamber 2
Even if the time required for cooling is further shortened, the cycle time of the entire process is determined by the time required for the sintering process and cooling process, and it is meaningless because further improvement in productivity cannot be realized. It is sufficient to cool the cooling gas by the water cooling wall of the furnace body 6 as in the above embodiment.
【００１２】また、上記実施例では、軸流型の送風機２
０を用いたことでその送風機が小形で済み、設置スペー
スをさほど必要としないという利点があるが、軸流型に
限らず他の形式の送風機も採用可能である。また、風向
調整板２１は省略しても良く、必要であれば送風機２０
自体の向きを調節することで吹出し方向を調節すれば良
い。Further, in the above embodiment, the axial flow type blower 2
The use of 0 has the advantage that the blower can be made small and does not require much installation space, but it is not limited to the axial flow type, and blowers of other types can also be adopted. Further, the wind direction adjusting plate 21 may be omitted and, if necessary, the blower 20.
The blowing direction may be adjusted by adjusting the direction of itself.
【００１３】[0013]
【考案の効果】以上で説明したように、本考案の連続式
脱脂焼結炉は、脱脂室に冷却ガスを吹き込むための送風
機を前室内に設けた構成であるから、その送風機により
冷却ガスを脱脂室の内部を通過するように強制循環させ
ることにより、脱脂室の内部を効率的に冷却でき、した
がって、新たなワークを装入するに先立って行う必要の
ある脱脂室の冷却に要する時間を大幅に短縮することが
でき、このため、脱脂工程の所要時間、ひいては全工程
のサイクルタイムを短縮し得て、生産性向上を図ること
ができる、という効果を奏する。As described above, since the continuous degreasing and sintering furnace of the present invention is provided with the blower for blowing the cooling gas into the degreasing chamber in the front chamber, the cooling gas is blown by the blower. By forcibly circulating so as to pass through the inside of the degreasing chamber, it is possible to efficiently cool the inside of the degreasing chamber, and therefore the time required for cooling the degreasing chamber that needs to be performed before loading a new workpiece. Therefore, the time required for the degreasing step, and thus the cycle time for all steps, can be shortened, and the productivity can be improved.
【図１】本考案に係る連続式脱脂焼結炉の一実施例を示
す図である。FIG. 1 is a diagram showing an embodiment of a continuous degreasing and sintering furnace according to the present invention.
【図２】従来の連続式脱脂焼結炉の一例を示す図であ
る。FIG. 2 is a diagram showing an example of a conventional continuous degreasing and sintering furnace.
１ 前室 ２ 脱脂室 ３ 焼結室 ４ 冷却室 ２０ 送風機 ２１ 風向調整板。 1 front chamber 2 degreasing chamber 3 sintering chamber 4 cooling chamber 20 blower 21 wind direction adjusting plate.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−212707（ＪＰ，Ａ) 特開 平２−166386（ＪＰ，Ａ) 特開 平３−106562（ＪＰ，Ａ) 実公 昭61−26327（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A 1-212707 (JP, A) JP-A 2-166386 (JP, A) JP-A 3-106562 (JP, A) Jikken Sho 61- 26327 (JP, Y2)
Claims (1)
に連設されている連続式脱脂焼結炉であって、上記前室
内に、上記脱脂室に冷却ガスを吹き込むための送風機を
設けてなることを特徴とする連続式脱脂焼結炉。1. A continuous degreasing / sintering furnace in which a front chamber, a degreasing chamber, a sintering chamber, and a cooling chamber are connected in that order, wherein a cooling gas is blown into the degreasing chamber. A continuous degreasing and sintering furnace characterized by being provided with a blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1368691U JP2500082Y2 (en) | 1991-02-18 | 1991-02-18 | Continuous degreasing and sintering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1368691U JP2500082Y2 (en) | 1991-02-18 | 1991-02-18 | Continuous degreasing and sintering furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04103596U JPH04103596U (en) | 1992-09-07 |
| JP2500082Y2 true JP2500082Y2 (en) | 1996-06-05 |
Family
ID=31748196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1368691U Expired - Lifetime JP2500082Y2 (en) | 1991-02-18 | 1991-02-18 | Continuous degreasing and sintering furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2500082Y2 (en) |
-
1991
- 1991-02-18 JP JP1368691U patent/JP2500082Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04103596U (en) | 1992-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960123 |