JP2731127B2 - Multi-chamber heat treatment furnace - Google Patents
Multi-chamber heat treatment furnaceInfo
- Publication number
- JP2731127B2 JP2731127B2 JP7098530A JP9853095A JP2731127B2 JP 2731127 B2 JP2731127 B2 JP 2731127B2 JP 7098530 A JP7098530 A JP 7098530A JP 9853095 A JP9853095 A JP 9853095A JP 2731127 B2 JP2731127 B2 JP 2731127B2
- Authority
- JP
- Japan
- Prior art keywords
- door
- chamber
- gas cooling
- cooling chamber
- gas
- 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
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Details (AREA)
- Tunnel Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は多室型熱処理炉に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-chamber heat treatment furnace.
【０００２】[0002]
【従来の技術】従来、前記多室型熱処理炉としては、た
とえば、特公平４−５３９２６号公報に示されるものが
ある。すなわち、図６に示す構成からなり、処理材Ｗを
加熱室３５のインナーチャンバー３６内で図示しない加
熱手段で加熱処理した後、中間扉４を介して前記処理材
Ｗをガス冷却室１に移行させ、ガス冷却室１内にＮ2ガ
ス等の冷却ガスを供給して前記ガス冷却室１内を１０ｂ
ａｒ未満の加圧状態に維持しつつ循環ファン４０により
ガス冷却室１内の雰囲気を強制循環させながら処理材Ｗ
をガス冷却し、その後、密閉構造の装入・抽出扉３を介
して抽出する。なお、３８は断熱扉である。2. Description of the Related Art A conventional multi-chamber heat treatment furnace is disclosed, for example, in Japanese Patent Publication No. 4-53926. That is, after the processing material W is heated by a heating means (not shown) in the inner chamber 36 of the heating chamber 35, the processing material W is transferred to the gas cooling chamber 1 through the intermediate door 4. Then, a cooling gas such as N 2 gas is supplied into the gas cooling chamber 1 so that
while the atmosphere in the gas cooling chamber 1 is forcibly circulated by the circulation fan 40 while maintaining the pressurized state of less than
Is gas-cooled and then extracted through a charging / extraction door 3 having a closed structure. Reference numeral 38 denotes a heat insulating door.
【０００３】[0003]
【発明が解決しようとする課題】ところで、前記構成の
ものでは、加熱室とガス冷却室とが昇降式中間扉４で区
画され、しかも中間扉４の扉フード９がガス冷却室１側
に配設されている。したがって、扉フード９部をガス冷
却室１と同様耐圧構造にする必要があり、それだけ高価
となる。また、扉フード９の容積分だけ排気ガス量が多
くなって排気装置の運転時間が長くなるとともに、冷却
ガス量が多くなってそれだけコスト高になるという課題
を有していた。本発明は、前記中間扉の構造および扉フ
ードの配設位置を変更することにより前記課題を解決す
る多室型熱処理炉を提供することを目的とする。By the way, in the above-mentioned structure, the heating chamber and the gas cooling chamber are divided by the liftable intermediate door 4, and the door hood 9 of the intermediate door 4 is arranged on the gas cooling chamber 1 side. Has been established. Therefore, the door hood 9 needs to have a pressure-resistant structure like the gas cooling chamber 1, which is expensive. Further, there is a problem that the exhaust gas amount increases by the volume of the door hood 9 and the operation time of the exhaust device increases, and the cooling gas amount increases and the cost increases accordingly. An object of the present invention is to provide a multi-chamber heat treatment furnace that solves the above-mentioned problems by changing the structure of the intermediate door and the arrangement position of the door hood.
【０００４】[0004]
【課題を解決するための手段】本発明は前記目的を達成
するために、ガス冷却室と加熱室を中間扉により区画し
た多室型熱処理炉において、前記ガス冷却室両側の処理
材通過用開口部にそれぞれクラッチ式密閉扉を設けて、
ガス冷却室を耐圧構造にするとともに、少なくとも加熱
室側のクラッチ式密閉扉を昇降式とし、かつ、加熱室の
処理材通過用開口部に断熱扉を設け、該断熱扉と前記加
熱室側のクラッチ式密閉扉とを前記加熱室とガス冷却室
との間に設けた扉フード内に配設したものである。In order to achieve the above object, the present invention provides a multi-chamber heat treatment furnace in which a gas cooling chamber and a heating chamber are separated by an intermediate door. Provide a clutch type closed door in each part,
The gas cooling chamber has a pressure-resistant structure, and at least the clutch-type closed door on the heating chamber side is an up-and-down type, and a heat insulating door is provided at a processing material passage opening of the heating chamber, and the heat insulating door and the heating chamber side are provided. A clutch type closed door is provided in a door hood provided between the heating chamber and the gas cooling chamber.
【０００５】[0005]
【実施例】つぎに、本発明の一実施例を図１にしたがっ
て説明する。本発明の多室型熱処理炉は、ガス冷却室１
と加熱室３５とからなる。前記ガス冷却室１は耐圧構造
からなり、処理材Ｗの通過用開口部の１つである装入・
抽出口２ａには昇降手段５ａにて昇降する装入・抽出扉
であるクラッチ式密閉扉３が、反対側処理材Ｗの通過用
開口部２ｂには中間扉であるクラッチ式密閉扉４が昇降
可能に設けてある。また、前記ガス冷却室１の上下部に
は多数の噴出ノズル７を有するノズルボックス６を有
し、下記するように、ガス冷却室１内に供給される冷却
Ｎ2ガスを図示しない循環ファンにより強制循環させな
がら、ノズルボックス６から処理材Ｗに向かって噴出す
るようになっている。なお、８は循環雰囲気を冷却する
クーラーである。Next, an embodiment of the present invention will be described with reference to FIG. The multi-chamber heat treatment furnace according to the present invention comprises a gas cooling chamber 1
And a heating chamber 35. The gas cooling chamber 1 has a pressure-resistant structure, and is one of the openings for passage of the processing material W.
A clutch-type closed door 3, which is a loading / extracting door, which rises and lowers by an elevating means 5a, is raised at the extraction port 2a, and a clutch-type closed door 4, which is an intermediate door, is raised and lowered at the opening 2b for passing the opposite side processing material W. It is provided as possible. Further, a nozzle box 6 having a large number of ejection nozzles 7 is provided at the upper and lower portions of the gas cooling chamber 1. As described below, the cooling N 2 gas supplied into the gas cooling chamber 1 is circulated by a circulating fan (not shown). The nozzles 6 are ejected toward the processing material W while being forcedly circulated. Reference numeral 8 denotes a cooler for cooling the circulation atmosphere.
【０００６】前記加熱室３５は内部にインナーチャンバ
ー３６を有し、このインナーチャンバー３６の処理材通
過用開口部３７には昇降式断熱扉３８が設けられてい
る。なお、３９はインナーチャンバー３６内に設けたヒ
ータ等の加熱手段である。そして、前記ガス冷却室１と
加熱室３５との対向する両側部および底部は一体構造と
なっており、上部は扉フード９で接続されるとともに、
前記中間扉４と断熱扉３８は扉フード９内で昇降手段５
ｂにより昇降するようになっている。なお、１０はハー
スローラ、１１はチャージテーブルである。The heating chamber 35 has an inner chamber 36 therein, and a heat-insulating door 38 is provided at an opening 37 for passage of the processing material in the inner chamber 36. Reference numeral 39 denotes a heating means such as a heater provided in the inner chamber 36. The opposite sides and the bottom of the gas cooling chamber 1 and the heating chamber 35 have an integral structure, and the upper part is connected by a door hood 9.
The intermediate door 4 and the heat-insulating door 38 are moved in the door hood 9 by the elevating means 5.
b ascends and descends. In addition, 10 is a hearth roller, 11 is a charge table.
【０００７】また、前記ガス冷却室１と加熱室３５には
真空排気装置（図示せず）が開閉弁Ｖ1，Ｖ2を介して接
続されるとともに、ガス冷却室１はベンド弁Ｖ3を介し
て外気に連通し、さらに、開閉弁Ｖ4，Ｖ5を介してＮ2
ガス源に連通し、一方、加熱室３５は開閉弁Ｖ6，Ｖ7を
介してＮ2ガス源に連通している。なお、Ｖ8は均圧弁で
ある。A vacuum exhaust device (not shown) is connected to the gas cooling chamber 1 and the heating chamber 35 via on-off valves V 1 and V 2 , and the gas cooling chamber 1 has a bend valve V 3 . communicates with the outside air through further, N 2 via an on-off valve V 4, V 5
The heating chamber 35 communicates with the N 2 gas source via on-off valves V 6 and V 7 . In addition, V 8 is a pressure equalizing valve.
【０００８】つぎに、クラッチ式密閉扉４の構成を図２
〜図５にしたがって説明する。クラッチ式密閉扉４は、
扉本体４ａと前記ガス冷却室１の処理材通過用開口部２
ｂの開口端部に設けたフランジ部１ａの外周に回転駆動
手段２５により正逆回転可能な断面コ字形の回転体１２
と前記扉本体４ａを前記フランジ部１ａに押圧・離間す
る押圧手段３０とからなる。Next, the structure of the clutch type closed door 4 is shown in FIG.
This will be described with reference to FIG. Clutch type closed door 4
Door body 4a and processing material passage opening 2 of gas cooling chamber 1
b, a rotating body 12 having a U-shaped cross section, which can be rotated forward and reverse by a rotation driving means 25 on the outer periphery of a flange portion 1a provided at an opening end of the b.
And pressing means 30 for pressing and separating the door body 4a from and to the flange portion 1a.
【０００９】そして、前記回転体１２の外側壁の内面に
は周方向に適宜間隔で山部１３と谷部１４とが形成さ
れ、一方、前記扉本体４ａのフランジ部４ｂには、前記
回転体の山部１３より大きい谷部１５と、谷部１４より
小さい山部１６とが設けられ、かつ、回転体１２が回転
した際、扉本体４ａの外周部内方を前記ガス冷却室１の
フランジ部１ａの端面に設けたパッキング１７を押圧す
るように、両山部１３，１６の対向面に周方向に傾斜し
た楔部材１８ａ，１８ｂを設けた構成となっている。A ridge 13 and a valley 14 are formed on the inner surface of the outer wall of the rotating body 12 at appropriate intervals in the circumferential direction, while the flange 4b of the door body 4a is provided with the rotating body. A valley portion 15 larger than the valley portion 13 and a ridge portion 16 smaller than the valley portion 14 are provided, and when the rotating body 12 rotates, the inside of the outer peripheral portion of the door main body 4a is moved to the flange portion of the gas cooling chamber 1. In order to press the packing 17 provided on the end face 1a, wedge members 18a and 18b which are inclined in the circumferential direction are provided on the opposing surfaces of the two ridges 13 and 16.
【００１０】また、扉本体４ａの外側には、下部に車輪
２０を備えたリブ２１が設けられ、下記するように扉本
体４ａが下降すると、前記車輪２０がレール２２上に転
動自在に支持されるようになっている。On the outside of the door body 4a, a rib 21 provided with wheels 20 is provided at a lower portion. When the door body 4a is lowered as described below, the wheels 20 are supported on the rails 22 so as to roll freely. It is supposed to be.
【００１１】前記回転駆動手段２５は、図４に示すよう
に、図示しない駆動シリンダの駆動により進退するシリ
ンダロッド２５ａが前記回転体１２の下部に突出したア
ーム２６を左右に回動することにより回転体１２を回動
させるものである。なお、２７は回転体１２の支持ロー
ラである。As shown in FIG. 4, the rotation driving means 25 is rotated by a cylinder rod 25a which advances and retreats by driving a driving cylinder (not shown) rotating an arm 26 projecting below the rotating body 12 right and left. The body 12 is rotated. Reference numeral 27 denotes a support roller for the rotating body 12.
【００１２】前記押圧手段３０は前記扉フード９の外側
方略中央部に設けた回動自在のレバー３１とこのレバー
３１を駆動するために加熱室３５外方に設けた駆動シリ
ンダ３３とからなる。一方、前記扉本体４ａの両側に縦
方向に設けたガイドバー３４が設けてあり、このガイド
バー３４は前記レバー３１の先端に設けた凹部３２に係
合しているため、前記扉本体４ａは図３の右側に示すよ
うに、レバー３１の凹部３２にガイドされて降下し、前
記回転体１２の山部１３と谷部１４とが扉本体４ａの谷
部１６と山部１５とに合致した状態で前記車輪２０がレ
ール２２上に位置する。ここで、駆動シリンダ３３を駆
動することにより、図３の左側に示すように、扉本体４
ａの外周部は回転体１２の内方に位置させることができ
る。The pressing means 30 comprises a rotatable lever 31 provided substantially at the center of the outside of the door hood 9 and a drive cylinder 33 provided outside the heating chamber 35 for driving the lever 31. On the other hand, a guide bar 34 provided in the longitudinal direction is provided on both sides of the door main body 4a, and the guide bar 34 is engaged with the concave portion 32 provided at the tip of the lever 31. As shown on the right side of FIG. 3, the lower part is guided by the concave part 32 of the lever 31, and the ridge 13 and the valley 14 of the rotating body 12 match the valley 16 and the ridge 15 of the door body 4a. In this state, the wheel 20 is located on the rail 22. Here, by driving the drive cylinder 33, as shown on the left side of FIG.
The outer periphery of “a” can be located inside the rotating body 12.
【００１３】したがって、いま、扉本体４ａが昇降手段
５ｂにより、前述のように、図３の右図状態で下降し、
車輪２０がレール２２上に載置される。この状態では、
図４に示すように、回転体１２の山部１３と谷部１４
に、扉本体４ａの谷部１６と山部１５が対向している。Therefore, the door body 4a is now lowered by the lifting means 5b in the state shown in the right diagram of FIG.
Wheels 20 are mounted on rails 22. In this state,
As shown in FIG. 4, a peak 13 and a valley 14 of the rotating body 12 are provided.
The valley 16 and the ridge 15 of the door body 4a face each other.
【００１４】つぎに、前記駆動シリンダ３３を作動させ
て扉本体４ａを前進させ、扉本体４ａの外周部を回転体
１２の内方に位置させる（図３の左図）。その後、回転
駆動手段２５を駆動することにより回転体１２を図４に
おいて反時計回り方向に回転することにより楔部材１８
ａ，１８ｂの相対回転により扉本体４ａをパッキング１
７に圧着させて、前記ガス冷却室１の開口部２ｂを密閉
するものである。クラッチ式密閉扉４を開放するには、
前記とは逆動作を行なえばよい。なお、前記クラッチ式
密閉扉３についても同一構成となっているが、このクラ
ッチ式密閉扉３はヒンジ方式であってもよい。Next, the drive cylinder 33 is operated to move the door body 4a forward, and the outer peripheral portion of the door body 4a is positioned inside the rotating body 12 (left diagram in FIG. 3). Thereafter, the rotating body 12 is rotated in the counterclockwise direction in FIG.
Packing 1 of door body 4a by relative rotation of a and 18b
7 to hermetically close the opening 2b of the gas cooling chamber 1. To open the clutch-type closed door 4,
What is necessary is just to perform operation reverse to the above. The clutch type closed door 3 has the same configuration, but the clutch type closed door 3 may be a hinge type.
【００１５】つぎに、前記構成からなる多室型熱処理炉
の操業方法を説明する。まず、図１の状態から装入・抽
出扉３を開とし、処理材Ｗをチャージテーブル１１から
ガス冷却室１内に装入する。その後、前記装入・抽出扉
３を閉とすると同時に、開閉弁Ｖ1，Ｖ2を開としてガス
冷却室１および加熱室３５内を真空排気する。そして、
前記ガス冷却室１内と加熱室３５内が、ほぼ同圧（約１
０-2Ｔｏｒｒ）になると、前記中間扉４と断熱扉３８を
開とし、処理材Ｗをハースローラ１０の駆動により加熱
室３５内に移行させ、前記中間扉４と断熱扉３８を閉と
する。インナーカバー３６内の処理材Ｗは加熱手段３９
により所定のヒートカーブにしたがって加熱処理され
る。なお、加熱期には、開閉弁Ｖ7を開とし、微量のＮ2
ガスが加熱室３５内に供給される。Next, an operation method of the multi-chamber heat treatment furnace having the above-described configuration will be described. First, the charging / extraction door 3 is opened from the state of FIG. 1, and the processing material W is charged from the charge table 11 into the gas cooling chamber 1. Thereafter, the charging / extracting door 3 is closed, and simultaneously, the on-off valves V 1 and V 2 are opened to evacuate the gas cooling chamber 1 and the heating chamber 35. And
The inside of the gas cooling chamber 1 and the inside of the heating chamber 35 have substantially the same pressure (about 1
When the pressure reaches 0 -2 Torr, the intermediate door 4 and the heat insulating door 38 are opened, the processing material W is moved into the heating chamber 35 by driving the hearth roller 10, and the intermediate door 4 and the heat insulating door 38 are closed. The processing material W in the inner cover 36 is heated by heating means 39.
Heat treatment is performed according to a predetermined heat curve. Incidentally, the heating period, the on-off valve V 7 is opened, traces of N 2
Gas is supplied into the heating chamber 35.
【００１６】加熱処理完了後、開閉弁Ｖ5，Ｖ6を開とし
てＮ2ガスを両室１，２５に供給し、均圧弁Ｖ8の作用に
よりほぼ同圧（約６００Ｔｏｒｒ）に復圧されると、中
間扉４と断熱扉３８を開として加熱室３５内の処理材Ｗ
をハースローラ１０の駆動によりガス冷却室１内に移行
させ、前記中間扉４と断熱扉３８を閉とする。その後、
開閉弁Ｖ1を閉とするとともに、Ｎ2ガス供給管の開閉弁
Ｖ4を開として、ガス冷却室１内にＮ2ガスを供給して冷
却室１内を５〜１０ｂａｒに保持すると同時に、循環フ
ァン（図示せず）を駆動して雰囲気を強制循環させなが
らＮ2ガスを噴出ノズル７から噴出させて加圧状態で処
理材Ｗを強制冷却して処理材Ｗのガス焼入れを行なう。
この場合、循環雰囲気はクーラー８により所定温度に冷
却される。After the completion of the heat treatment, the on-off valves V 5 and V 6 are opened to supply N 2 gas to both chambers 1 and 25, and the pressure is restored to substantially the same pressure (about 600 Torr) by the action of the equalizing valve V 8. The intermediate door 4 and the heat-insulating door 38 are opened, and the processing material W in the heating chamber 35 is opened.
Is moved into the gas cooling chamber 1 by driving the hearth roller 10, and the intermediate door 4 and the heat insulating door 38 are closed. afterwards,
Off valve V 1 with the closed, on-off valve V 4 of the N 2 gas supply pipe is opened, when by supplying N 2 gas to hold the cooling chamber 1 into 5~10bar the gas cooling chamber 1 at the same time, By driving a circulation fan (not shown) and forcibly circulating the atmosphere, N 2 gas is ejected from the ejection nozzle 7 to forcibly cool the processing material W in a pressurized state, thereby performing gas quenching of the processing material W.
In this case, the circulation atmosphere is cooled to a predetermined temperature by the cooler 8.
【００１７】前記のようにして、処理材Ｗのガス冷却が
完了すると、開閉弁Ｖ4を閉、ベント弁Ｖ3を開としてガ
ス冷却室１内を大気圧としたのち、装入・抽出扉３を開
として処理材Ｗをハースローラ１０の駆動によりチャー
ジテーブル１１上に抽出する。[0017] As described above, the gas cooling of the treated material W is completed, after the on-off valve V 4 is closed, the gas cooling chamber 1 a vent valve V 3 is opened to the atmospheric pressure, charging and extraction door 3 is opened, and the processing material W is extracted onto the charge table 11 by driving the hearth roller 10.
【００１８】[0018]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、ガス冷却室は耐圧構造であるとともに、その両
側の扉はクラッチ式密閉扉とし、そのうちの加熱室側の
中間扉をガス冷却室と加熱室との間に設けた扉フード内
を昇降するようにしたものである。したがって、冷却ガ
スはガス冷却室内にのみ供給して、従来のように扉フー
ド内に供給しないので冷却ガスの使用量は、従来に比べ
て約４０％減少することが可能となった。また、扉フー
ドには高圧冷却ガスが供給されないため、耐圧構造とす
る必要がなく、それだけ設備費を安価とすることができ
るという効果を奏する。As is apparent from the above description, according to the present invention, the gas cooling chamber has a pressure-resistant structure, the doors on both sides thereof are clutch-type closed doors, and the intermediate door on the side of the heating chamber is used. The inside of a door hood provided between the gas cooling chamber and the heating chamber is moved up and down. Therefore, since the cooling gas is supplied only into the gas cooling chamber and not supplied into the door hood as in the conventional case, the amount of the cooling gas used can be reduced by about 40% as compared with the conventional case. In addition, since the high-pressure cooling gas is not supplied to the door hood, there is no need to provide a pressure-resistant structure, so that there is an effect that the equipment cost can be reduced accordingly.
【図１】 本発明にかかる多室型熱処理炉の断面図。FIG. 1 is a sectional view of a multi-chamber heat treatment furnace according to the present invention.
【図２】 クラッチ式密閉扉の要部断面図。FIG. 2 is a sectional view of a main part of a clutch type closed door.
【図３】 図２のIII−III線断面におけるクラッチ式密
閉扉とその駆動機構を示す図。FIG. 3 is a diagram showing a clutch type closed door and a drive mechanism thereof in a cross section taken along line III-III of FIG. 2;
【図４】 回転体の回転機構を示す図。FIG. 4 is a diagram showing a rotating mechanism of a rotating body.
【図５】 図１のガス冷却室、回転体、扉本体の関係を
示す断面図。FIG. 5 is a sectional view showing the relationship between the gas cooling chamber, the rotating body, and the door body of FIG.
【図６】 従来の多室型熱処理炉の断面図。FIG. 6 is a sectional view of a conventional multi-chamber heat treatment furnace.
１…ガス冷却室、３，４…クラッチ式密閉扉、６…噴出
ノズルボックス、８…循環ファン、９…扉フード、１０
…ハースローラ、３５…加熱室、３６…インナーチャン
バー、３７…処理材通過用開口部、３８…断熱扉、３９
…加熱手段、Ｗ…処理材。DESCRIPTION OF SYMBOLS 1 ... Gas cooling chamber, 3, 4 ... Clutch type closed door, 6 ... Spout nozzle box, 8 ... Circulation fan, 9 ... Door hood, 10
... hearth roller, 35 ... heating chamber, 36 ... inner chamber, 37 ... opening for processing material passage, 38 ... heat insulating door, 39
... heating means, W ... treatment material.
Claims (1)
した多室型熱処理炉において、前記ガス冷却室両側の処
理材通過用開口部にそれぞれクラッチ式密閉扉を設け
て、ガス冷却室を耐圧構造にするとともに、少なくとも
加熱室側のクラッチ式密閉扉を昇降式とし、かつ、加熱
室の処理材通過用開口部に断熱扉を設け、該断熱扉と前
記加熱室側のクラッチ式密閉扉とを前記加熱室とガス冷
却室との間に設けた扉フード内に配設したことを特徴と
する多室型熱処理炉。In a multi-chamber heat treatment furnace in which a gas cooling chamber and a heating chamber are separated by an intermediate door, a clutch-type closed door is provided at each of processing material passage openings on both sides of the gas cooling chamber, and the gas cooling chamber is provided. In addition to the pressure-resistant structure, at least the heating-chamber-side clutch-type closed door is of an up-and-down type, and a heat-insulating door is provided at the processing material passage opening of the heating chamber. Are disposed in a door hood provided between the heating chamber and the gas cooling chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7098530A JP2731127B2 (en) | 1995-04-24 | 1995-04-24 | Multi-chamber heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7098530A JP2731127B2 (en) | 1995-04-24 | 1995-04-24 | Multi-chamber heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08295926A JPH08295926A (en) | 1996-11-12 |
| JP2731127B2 true JP2731127B2 (en) | 1998-03-25 |
Family
ID=14222240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7098530A Expired - Lifetime JP2731127B2 (en) | 1995-04-24 | 1995-04-24 | Multi-chamber heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2731127B2 (en) |
Cited By (2)
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5920638U (en) * | 1982-07-29 | 1984-02-08 | 日本電気ホームエレクトロニクス株式会社 | positioning device |
| JPH0453926A (en) * | 1990-06-21 | 1992-02-21 | Nippon Sheet Glass Co Ltd | Illuminator |
| JP2959063B2 (en) * | 1990-07-05 | 1999-10-06 | 大同特殊鋼株式会社 | Roller hearth vacuum furnace |
| JPH0538036U (en) * | 1991-10-14 | 1993-05-21 | ミサワホーム株式会社 | Anchor bolt positioning jig |
-
1995
- 1995-04-24 JP JP7098530A patent/JP2731127B2/en not_active Expired - Lifetime
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|---|---|---|---|---|
| US7625204B2 (en) | 2003-06-27 | 2009-12-01 | Ihi Corporation | Gas cooling type vacuum heat treating furnace and cooling gas direction switching device therefor |
| WO2005090616A1 (en) | 2004-03-18 | 2005-09-29 | Ishikawajima-Harima Heavy Industries Co. Ltd. | Double-chamber heat treating furnace |
| JPWO2005090616A1 (en) * | 2004-03-18 | 2008-02-07 | 株式会社Ihi | Two-chamber heat treatment furnace |
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| JP4645592B2 (en) * | 2004-03-18 | 2011-03-09 | 株式会社Ｉｈｉ | Two-chamber heat treatment furnace |
| CN1926249B (en) * | 2004-03-18 | 2011-04-27 | 石川岛播磨重工业株式会社 | Double chamber type heat treatment furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08295926A (en) | 1996-11-12 |
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