JPH0666476A - Heating method in tunneled continuous furnace chamber - Google Patents
Heating method in tunneled continuous furnace chamberInfo
- Publication number
- JPH0666476A JPH0666476A JP26267692A JP26267692A JPH0666476A JP H0666476 A JPH0666476 A JP H0666476A JP 26267692 A JP26267692 A JP 26267692A JP 26267692 A JP26267692 A JP 26267692A JP H0666476 A JPH0666476 A JP H0666476A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- temperature
- heated
- chamber
- article
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、トンネル状の連続炉室
内での加熱方法、例えば金属粉等の焼結のための加熱方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating method in a tunnel-shaped continuous furnace chamber, for example, a heating method for sintering metal powder or the like.
【０００２】[0002]
【従来の技術】被加熱物を炉中で加熱処理するとき、加
熱処理の目的に従って被加熱物を特定の温度曲線に沿っ
て昇温，冷却することが望ましい。このために、炉を連
続するトンネル状の炉室で構成し、各室の雰囲気を上記
した温度曲線に合うように時々刻々昇温又は降温して制
御することがなされてきた。2. Description of the Related Art When heat-treating an object to be heated in a furnace, it is desirable to heat and cool the object to be heated along a specific temperature curve according to the purpose of the heat treatment. For this reason, the furnace has been constructed by a continuous tunnel-shaped furnace chamber, and the atmosphere in each chamber has been controlled by raising or lowering the temperature momentarily so as to match the above-mentioned temperature curve.
【０００３】しかし、このように各室の雰囲気の温度を
制御することは、非常に難しい。その理由は、既にある
温度になっている各室の炉壁を急速に昇温又は降温でき
ないためである。このように昇温又は降温することは不
可能ではないが、多大の操作上と炉構造上の不利と不便
が生じる。However, it is very difficult to control the temperature of the atmosphere in each room in this way. The reason is that the furnace wall of each chamber, which is already at a certain temperature, cannot be rapidly heated or cooled. Although it is not impossible to raise or lower the temperature in this way, a great deal of operational and furnace disadvantages and inconveniences arise.
【０００４】[0004]
【発明が解決しようとする課題】そこで、連続するトン
ネル状の炉室を用いて、いかによく被加熱物を所望の温
度曲線に沿って加熱・冷却するかが、本発明が解決しよ
うとする課題である。Therefore, the problem to be solved by the present invention is how to heat and cool an object to be heated along a desired temperature curve by using a continuous tunnel-shaped furnace chamber. Is.
【０００５】[0005]
【課題を解決するための手段】本発明では、連続して設
けられ全体としてトンネル状の炉を構成する各炉室のそ
れぞれの温度を予め各室のために設定した温度に保持し
て不変とする。そして、この炉中を通過する被加熱物の
時々刻々の温度を測定し、この測定値に基づいて被加熱
物を炉中で前進又は後退移動させ、所望の温度曲線に沿
って被加熱物が加熱・冷却されるようにしたものであ
る。換言すれば、長方形のトンネル状の炉室の各炉室を
異なる一定の温度に保持し、被加熱物が目的とする温度
と目的とする時間下で加熱されるように、炉の長手方向
で移動，滞留せしめるようにしたものである。In the present invention, the temperature of each furnace chamber which is continuously provided and constitutes a tunnel-shaped furnace as a whole is kept constant at a temperature preset for each chamber. To do. Then, the momentary temperature of the object to be heated passing through the furnace is measured, and the object to be heated is moved forward or backward in the furnace based on the measured value, and the object to be heated is moved along a desired temperature curve. It is designed to be heated and cooled. In other words, holding each furnace chamber of the rectangular tunnel furnace chamber at a different constant temperature, in the longitudinal direction of the furnace so that the object to be heated is heated at the desired temperature and the desired time. It is designed to be moved and retained.
【０００６】[0006]
実施例−１ 本発明の方法を実施するために、図１に示される実験用
炉を用いた。この炉の全長は３０００ｍｍで、耐火性材
料の炉壁１により作られる加熱室Ｂ，Ｃ，Ｄ，Ｅと、金
属性材料による低温部室Ａ，Ｆとからなる。トンネル状
に連続する室には、加熱手段又は冷却手段（図示せず）
が設けられ、この実施例１の鉄系材料になる被加熱物８
の焼結では、各室は次の通りの温度に保持した。 Ａ室 ２００℃ Ｂ室 ７５０℃ Ｃ室 ９５０℃ Ｄ室 １１５０℃ Ｅ室 ７５０℃ Ｆ室 ２００℃Example-1 An experimental furnace shown in FIG. 1 was used to carry out the method of the present invention. This furnace has a total length of 3000 mm and comprises heating chambers B, C, D and E formed by a furnace wall 1 made of refractory material, and low temperature chambers A and F made of metallic material. In the tunnel-like continuous chamber, heating means or cooling means (not shown)
And the object to be heated 8 which is the iron-based material of the first embodiment
In sintering, each chamber was maintained at the following temperatures. Room A 200 ° C Room B 750 ° C Room C 950 ° C Room D 1150 ° C Room E 750 ° C Room F 200 ° C
【０００７】なお、炉内雰囲気には窒素を用い、上記し
た各室の長さは、図１においてＬ１，Ｌ２，Ｌ３，
Ｌ４，Ｌ５，Ｌ６で示される通りとした。Nitrogen is used as the atmosphere in the furnace, and the lengths of the above-mentioned chambers are L 1 , L 2 , L 3 in FIG.
It was set as shown by L 4 , L 5 , and L 6 .
【０００８】被加熱物８（０．６％Ｃ鋼粉の加圧成型
品）をグラファイト製のボート２中に入れた。このボー
ト２には、ボートを前進又は後進するための作動杆４が
取付けられ、また図２に示されるようにボート２中の被
焼結品８の温度を検出するための温度検出プローブが設
けられている。The article to be heated 8 (pressurized product of 0.6% C steel powder) was placed in the boat 2 made of graphite. An operating rod 4 for advancing or reversing the boat is attached to the boat 2, and a temperature detection probe for detecting the temperature of the article 8 to be sintered in the boat 2 is provided as shown in FIG. Has been.
【０００９】検出された被加熱物８の温度は、図２に示
される通り温度検出・比較判断装置に送られ、この装置
には比較判断のために予め所望の加熱パタンが入力され
ている。The detected temperature of the object 8 to be heated is sent to a temperature detection / comparison judgment device as shown in FIG. 2, and a desired heating pattern is inputted in advance to this device for comparison judgment.
【００１０】温度検出・比較判断装置から送られる信号
は制御装置に入り、これによって作動杆４を前進，後進
又は停滞せしめるための前・後進の駆動装置が働く。A signal sent from the temperature detecting / comparing / determining device enters a control device, whereby a front / reverse driving device for moving the operating rod 4 forward, backward or stagnate is activated.
【００１１】なお、図１中で、５は炉の入口及び出口を
閉鎖するための手動のシャッターであり、６は支持脚、
７は炉床である。In FIG. 1, 5 is a manual shutter for closing the inlet and outlet of the furnace, 6 is a supporting leg,
7 is a hearth.
【００１２】上記した被加熱物８を焼結するための所望
の温度曲線は、図３で点線で示されるものであり、これ
を加熱パタンとして温度検出・比較判断装置に入力し
た。The desired temperature curve for sintering the above-mentioned object 8 to be heated is shown by the dotted line in FIG. 3, and this was input as a heating pattern to the temperature detection / comparison judgment device.
【００１３】ボート８の炉中の全滞留時間は２時間であ
り、ボートは図２で示される通りに制御されて炉中を前
進し、ボート中の被加熱物は図３中で実線で示される如
くに加熱された。これは、所望の加熱パタンに近似した
ものであって、被加熱物８を所期の通りに焼結すること
ができた。The total residence time of the boat 8 in the furnace is 2 hours, the boat is controlled and advanced in the furnace as shown in FIG. 2, and the object to be heated in the boat is shown by the solid line in FIG. It was heated as it was. This was close to the desired heating pattern, and the object 8 to be heated could be sintered as expected.
【００１４】このように制御されたボートのＡ室，Ｂ
室，Ｃ室，Ｄ室，Ｅ室，Ｆ室での滞留時間は、図３中で
それぞれＴａ，Ｔｂ，Ｔｃ，Ｔｄ，Ｔｅ，Ｔｆにより示
される通りであった。全体の滞留時間は、実施した通り
２時間であった。The rooms A and B of the boat thus controlled
The residence times in chambers C, D, E, and F were as shown by Ta, Tb, Tc, Td, Te, and Tf in FIG. 3, respectively. The total residence time was 2 hours as performed.
【００１５】なお、作動杆４の代りにコンベアベルトを
用い、このコンベアを動きを前進した通りに制御してボ
ートを搬送しても、本発明の方法を実施できることは勿
論のことである。Needless to say, the method of the present invention can be carried out even if a conveyor belt is used instead of the operating rod 4 and the boat is conveyed by controlling the movement of the conveyor as if it were moved forward.
【００１６】実施例−２ セラミック材になる被加熱物８を上記実施例１と同様に
加熱焼結した。このときの各室の温度は、次の通りに保
持した。 Ａ室 ２００℃ Ｂ室 １０００℃ Ｃ室 １６００℃ Ｄ室 １４００℃ Ｅ室 １０００℃ Ｆ室 ２００℃Example-2 The object to be heated 8 which became a ceramic material was heated and sintered in the same manner as in Example 1 above. The temperature of each chamber at this time was maintained as follows. Room A 200 ° C Room B 1000 ° C Room C 1600 ° C Room D 1400 ° C Room E 1000 ° C Room F 200 ° C
【００１７】このときの所望加熱パタンとして、図４中
にて点線で示される曲線を用いた。同図中の実線で示さ
れる通りに加熱制御され、所期の通りに焼結ができた。As the desired heating pattern at this time, the curve shown by the dotted line in FIG. 4 was used. The heating was controlled as indicated by the solid line in the figure, and the sintering was performed as expected.
【００１８】各室での滞留時間は、Ｔａ〜Ｔｆで示され
る通りであり、全滞留時間は１０時間であった。The residence time in each chamber was as shown by Ta to Tf, and the total residence time was 10 hours.
【００１９】この実施例２で見られる通り、ボートは先
ずＡ室，Ｂ室，Ｃ室と順次に滞留，前進した後に、Ｄ室
を飛び越えてＥ室で降温加熱され、次に後進してＤ室で
昇温加熱され、その後に再度Ｅ室に入り、Ｆ室ヘと前進
して、効率良く所望の加熱パタンを踏襲した。これが、
本発明方法の優れた一面である。As can be seen from the second embodiment, the boat first stays in the chambers A, B, and C in order and moves forward, then jumps over the chamber D and is heated in the chamber E to lower the temperature, and then moves backward to drive the chamber D. After being heated and heated in the chamber, the chamber E was reentered, and the chamber F was advanced to the chamber F to efficiently follow the desired heating pattern. This is,
This is an excellent aspect of the method of the present invention.
【００２０】[0020]
【発明の効果】このように、本発明法によれば、炉を構
成する各室をそれぞれ所定の温度に保ち、炉中に入れら
れた被加熱物の温度を検出して、この温度が所望の加熱
パタンに沿うように被加熱物を前進又は後進せしめて選
択された室中で加熱するものであるので、各室の温度を
上下動させる不便と不都合がなく、しかも被処理物は最
も効率的に所望の加熱パタン下で熱処理される優れた効
果がある。As described above, according to the method of the present invention, each chamber constituting the furnace is kept at a predetermined temperature, the temperature of the object to be heated put in the furnace is detected, and this temperature is desired. Since the object to be heated is heated in the selected chamber by advancing or moving backward along the heating pattern of No. 1, there is no inconvenience and inconvenience of moving the temperature of each chamber up and down, and the object to be treated is the most efficient. There is an excellent effect of heat treatment under a desired heating pattern.
【図１】本発明を実施するための炉の説明的な断面図で
ある。1 is an explanatory cross-sectional view of a furnace for carrying out the present invention.
【図２】所望の加熱パタンに従って被加熱物を炉中で滞
留，前進又は後進せしめるための制御手段の説明的なブ
ロック図である。FIG. 2 is an explanatory block diagram of a control means for causing the object to be heated to stay, advance, or move backward in the furnace according to a desired heating pattern.
【図３】本発明方法の一例としての鉄系成型品の焼結の
ための所望の加熱パタン（点線）と、本発明の方法によ
る実際の加熱温度線（実線）と、炉中の各室での被加熱
物の滞留時間との関係を示すグラフである。FIG. 3 shows a desired heating pattern (dotted line) for sintering an iron-based molded article as an example of the method of the present invention, an actual heating temperature line (solid line) by the method of the present invention, and chambers in the furnace. 3 is a graph showing a relationship with the residence time of the object to be heated in FIG.
【図４】図３と同様のグラフで、本発明方法の他の一例
としてのセラミック系成型品の焼結の場合を示すもので
ある。FIG. 4 is a graph similar to FIG. 3, showing the case of sintering a ceramic-based molded article as another example of the method of the present invention.
１−炉壁 ２−ボート ３−温度検出プローブ ４−作動杆 ５−シャッター ６−支持脚 ７−炉床 ８−被加熱物 Ａ，Ｂ，Ｃ，Ｄ，Ｅ，Ｆ−炉中の各炉室 Ｌ１，Ｌ２，Ｌ３，Ｌ４，Ｌ５，Ｌ６−各炉室の長さ Ｔａ，Ｔｂ，Ｔｃ，Ｔｄ，Ｔｅ，Ｔｆ−選択された炉室
中での被加熱物の滞留時間1-Furnace wall 2-Boat 3-Temperature detection probe 4-Operating rod 5-Shutter 6-Supporting leg 7-Heart floor 8-Heating object A, B, C, D, E, F-Each furnace chamber in the furnace L 1, L 2, L 3 , L 4, L 5, L 6 - length Ta of the furnace chamber, Tb, Tc, Td, Te , Tf- residence time of the heated object in a selected furnace chamber
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２７Ｄ 19/00 Ｚ 8222−4Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location F27D 19/00 Z 8222-4K
Claims (1)
の炉内で被加熱物を加熱する方法であって、該炉室をそ
れぞれに選択した一定の温度下に保持し、炉内にある被
加熱物の温度を逐次検出して、この温度が所望の加熱パ
タンに合って昇温又は降温するように被加熱物が選択さ
れた炉室へ前進，後進又は滞留するように制御して加熱
することを特徴とするトンネル状連続炉室内での加熱方
法。1. A method for heating an object to be heated in a tunnel-shaped furnace composed of a plurality of continuous furnace chambers, wherein the furnace chambers are each kept at a selected constant temperature and are inside the furnace. Sequentially detects the temperature of the object to be heated and heats it by controlling it to move forward, backward or stay in the selected furnace chamber so that this temperature rises or falls according to the desired heating pattern. A heating method in a tunnel-shaped continuous furnace chamber, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26267692A JPH0666476A (en) | 1992-08-19 | 1992-08-19 | Heating method in tunneled continuous furnace chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26267692A JPH0666476A (en) | 1992-08-19 | 1992-08-19 | Heating method in tunneled continuous furnace chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0666476A true JPH0666476A (en) | 1994-03-08 |
Family
ID=17379048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26267692A Pending JPH0666476A (en) | 1992-08-19 | 1992-08-19 | Heating method in tunneled continuous furnace chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0666476A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009092301A (en) * | 2007-10-05 | 2009-04-30 | Ngk Insulators Ltd | Heat treatment furnace |
-
1992
- 1992-08-19 JP JP26267692A patent/JPH0666476A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009092301A (en) * | 2007-10-05 | 2009-04-30 | Ngk Insulators Ltd | Heat treatment furnace |
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