JP4587022B2

JP4587022B2 - Continuous firing furnace and continuous firing method

Info

Publication number: JP4587022B2
Application number: JP2004102799A
Authority: JP
Inventors: 和美森
Original assignee: IHI Corp
Current assignee: IHI Corp
Priority date: 2004-03-31
Filing date: 2004-03-31
Publication date: 2010-11-24
Anticipated expiration: 2024-03-31
Also published as: JP2005291515A

Description

本発明は複数の被処理品を連続的に焼成する連続焼成炉および連続焼成方法に関する。 The present invention relates to a continuous baking furnace and a continuous baking method for continuously baking a plurality of articles to be processed.

図９は、下記特許文献１に開示された従来の連続焼成炉の構成を示すものである。この連続焼成炉は、被処理品５１を載置したトレー５２が通過し得る挿入脱気室５３と、該装入脱気室５３に連なるチャンバ５４内に設置され且つ一列に並んだ複数のトレー５２が装入脱気室５３から順次送り込まれる焼成炉本体５５と、チャンバ５４に連なり且つ焼成炉本体５５を経たトレー５２が通過し得る抽出脱気室５６とを備えている。 FIG. 9 shows a configuration of a conventional continuous firing furnace disclosed in Patent Document 1 below. This continuous baking furnace includes an insertion deaeration chamber 53 through which a tray 52 on which an object 51 is placed can pass, and a plurality of trays arranged in a row and arranged in a chamber 54 connected to the charging / deaeration chamber 53. 52 includes a firing furnace main body 55 sequentially fed from the charging / deaeration chamber 53 and an extraction deaeration chamber 56 that is connected to the chamber 54 and through which the tray 52 that has passed through the firing furnace main body 55 can pass.

入側脱気室５３及び出側脱気室５６は、トレー５２搬送方向上流側箇所と下流側箇所のそれぞれに昇降可能な扉体５７，５８，５９，６０を有している。扉体５７，５８，５９，６０を下降位置に設定すると、入側脱気室５３、チャンバ５４、出側脱気室５６の気密が保持される状態になり、扉体５７，５８，５９，６０を上昇位置に設定すると、トレー５２の通過が許容される状態になる。また、入側脱気室５３、焼成炉本体５５、並びに出側脱気室５６内には、その略全長にわたって左右一対のスキッドビーム６１，６２，６３が、トレー５２を下方から摺動可能に支持するように設けられている。焼成炉本体５５の長手方向中間部内方には、上下に延びる複数のヒータ６４が、トレー５２上の焼成対象物集合体５１の左右両側に位置するように配置されており、これらのヒータ６４によって、被処理品５１が加熱される。更に、連続焼成炉には、装入脱気室５３から焼成炉本体５５へトレー５２を１つずつ押し込むプッシャ６５と、焼成炉本体５５から抽出脱気室５６へトレー５２を１つずつ引き出すプラー６６とが付帯している。 The inlet-side deaeration chamber 53 and the outlet-side deaeration chamber 56 have door bodies 57, 58, 59, 60 that can be raised and lowered at upstream and downstream locations in the tray 52 conveyance direction, respectively. When the door bodies 57, 58, 59, 60 are set at the lowered position, the air-tightness of the inlet side deaeration chamber 53, the chamber 54, and the outlet side deaeration chamber 56 is maintained, and the door bodies 57, 58, 59, When 60 is set to the raised position, the tray 52 is allowed to pass. In addition, a pair of left and right skid beams 61, 62, and 63 are slidable from below on the inlet side deaeration chamber 53, the firing furnace body 55, and the outlet side deaeration chamber 56 over substantially the entire length thereof. It is provided to support. A plurality of heaters 64 extending vertically are disposed on the left and right sides of the firing object aggregate 51 on the tray 52 inside the intermediate portion in the longitudinal direction of the firing furnace main body 55. The article to be processed 51 is heated. Further, the continuous firing furnace includes a pusher 65 that pushes the tray 52 from the charging deaeration chamber 53 into the firing furnace body 55 one by one, and a puller that pulls out the tray 52 from the firing furnace body 55 to the extraction deaeration chamber 56 one by one. 66 is attached.

連続焼成炉を稼動させる際には、扉体５８，５９を閉じた状態で焼成炉本体５５内へ無酸化ガスを充填し、ヒータ６４を作動させて焼成炉本体５５内を、予め設定されている温度に加熱する。次いで、被処理品５１が載置されているトレー５２を入側脱気室５３へ搬入し、扉体５７を閉じて入側脱気室５３内の空気を外部へ排出した後、扉体５８を開いたうえ、プッシャ６５によってトレー５２を焼成炉本体５５内へ押し込み、再び扉体５８を閉じる。所定時間が経過した後、上述したような手順で、別のトレー５２を入側脱気室５３から焼成炉本体５５内へ押し込み、当該トレー５２によって既に入側脱気室５３に押し込まれているトレー５２を、出側脱気室５６へ向かって押し出す。 When the continuous firing furnace is operated, a non-oxidizing gas is filled into the firing furnace main body 55 with the doors 58 and 59 closed, and the heater 64 is operated to set the interior of the firing furnace main body 55 in advance. Heat to a certain temperature. Next, the tray 52 on which the product to be processed 51 is placed is carried into the entry-side deaeration chamber 53, the door body 57 is closed, and the air in the entry-side deaeration chamber 53 is discharged to the outside. , The tray 52 is pushed into the firing furnace main body 55 by the pusher 65, and the door body 58 is closed again. After a predetermined time has passed, another tray 52 is pushed into the firing furnace main body 55 from the entry side deaeration chamber 53 by the procedure as described above, and has already been pushed into the entry side deaeration chamber 53 by the tray 52. The tray 52 is pushed toward the outlet side deaeration chamber 56.

このような作業を繰り返すことにより、トレー５２が焼成炉本体５５の搬送方向最下流側まで進んだならば、扉体６０を閉じた状態で扉体５９を開き、プラー６６によりトレー５２を焼成炉本体５５内から出側脱気室５６内へ引き出し、更に、扉体５９を閉じたうえ、扉体６０を開いてトレー５２を外部へ取り出す。これにより、被処理品５１は、焼成炉本体５５内の入側脱気室５３寄り部分の予熱室６７で所定の時間をかけて徐々に昇温され、焼成炉本体５５内の中間部分の加熱室６８で所定の時間、一定温度に加熱され、更に、焼成炉本体５５内の出側脱気室５６寄り部分の冷却室６９で所定の時間をかけて徐々に冷却される。 By repeating such an operation, when the tray 52 has advanced to the most downstream side in the conveying direction of the baking furnace body 55, the door body 59 is opened with the door body 60 closed, and the tray 52 is removed from the baking furnace by the puller 66. The main body 55 is drawn into the outlet side deaeration chamber 56, the door body 59 is closed, the door body 60 is opened, and the tray 52 is taken out. As a result, the product 51 is gradually heated over a predetermined time in the preheating chamber 67 near the entry-side degassing chamber 53 in the baking furnace body 55, and the intermediate portion in the baking furnace body 55 is heated. It is heated to a constant temperature in the chamber 68 for a predetermined time, and further cooled gradually in the cooling chamber 69 near the outlet side deaeration chamber 56 in the firing furnace body 55 over a predetermined time.

特開２００２−１３０９５６号公報JP 2002-130956 A

ところで、被処理品の材質や形状、大きさが異なると、それに伴ってその焼成に最適な熱処理曲線も異なってくる。例えば、被処理品によってはある加熱区域において急速加熱が要求されるものがある。このため、一つの連続焼成炉で種々の被処理品を焼成するためには、各被処理品の焼成に適した熱処理曲線を実現することが要求される。しかし、上記従来の連続焼成炉は、輻射加熱式のヒータにより被処理品を加熱焼成させるものであるため、被処理品に熱伝導率以上の急激な温度変化をもたせることはできない。また、連続炉の場合、いったん設定した熱処理曲線を短時間で任意に変更するのは困難である。 By the way, when the material, shape, and size of the article to be processed are different, the heat treatment curve that is optimal for the firing is also different. For example, some products require rapid heating in a certain heating area. For this reason, in order to bake various to-be-processed goods with one continuous baking furnace, it is requested | required that the heat processing curve suitable for baking of each to-be-processed goods should be implement | achieved. However, since the above-mentioned conventional continuous firing furnace heats and heats the product to be processed by a radiant heating type heater, the product to be processed cannot have a rapid temperature change higher than the thermal conductivity. In the case of a continuous furnace, it is difficult to arbitrarily change the heat treatment curve once set in a short time.

本発明は上述した問題点を解決するために創案されたものである。すなわち、本発明の目的は、被処理品の加熱速度を任意の加熱区域で自由に変化させ、多様な熱処理曲線を実現することにより、多品種の焼成品を生産することができる連続焼成炉および連続焼成方法を提供することにある。 The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to provide a continuous firing furnace capable of producing a wide variety of fired products by changing the heating rate of the product to be treated freely in an arbitrary heating zone and realizing various heat treatment curves. It is to provide a continuous firing method.

上記目的を達成するため、本発明の連続焼成炉は、被処理品の焼成を行う処理室内に被処理品を載置した複数のトレーを順次間欠的に送り込んで、複数の被処理品を連続的に焼成する連続焼成炉であって、前記処理室内に設けられ、被処理品を載置した複数のトレーが上流側から下流側に向かって内部を通過し得るように形成された加熱室と、該加熱室内に設けられ、被処理品を加熱するヒータと、前記加熱室内で特定の被処理品を通電加熱する複数の通電加熱装置と、を備え、前記加熱室は、炉長方向において互いに異なる位置に設けられた複数の加熱区域を有し、前記複数の通電加熱装置は、それぞれ前記複数の加熱区域に設けられ、特定の被処理品を、上流側の前記加熱区域にて上流側の前記通電加熱装置により通電加熱した後、下流側の前記加熱区域へ搬送し、下流側の前記加熱区域にて下流側の前記通電加熱装置により通電加熱できるようになっている、ことを特徴とする。 In order to achieve the above object, the continuous firing furnace of the present invention continuously feeds a plurality of products to be processed by intermittently feeding a plurality of trays on which the products to be processed are placed into a processing chamber for firing the products to be processed. A continuous firing furnace for firing automatically, a heating chamber provided in the processing chamber and formed such that a plurality of trays on which articles to be processed are placed can pass from the upstream side toward the downstream side. , provided in the heating chamber, a heater for heating the workpieces, and a plurality of electrical heating device for electrically heating a specific workpieces in the heating chamber, the heating chamber are each in the furnace length direction A plurality of heating and heating devices provided at different positions, and the plurality of energization heating devices are respectively provided in the plurality of heating zones, and a specific article to be treated is disposed upstream of the heating zone on the upstream side. After energization heating by the energization heating device, downstream The transported to the heating zone, so that the current can be supplied heated by the electrical heating device on the downstream side in the heating zone of the downstream side, it is characterized by the.

また、本発明の連続焼成炉において、好ましくは、前記通電加熱装置は、被処理品を上下から挟持する上部及び下部の電極と、該電極間に通電する通電加熱用電源とを備える。 Further, in the continuous firing furnace of the present invention, preferably, the electrical heating device is provided with upper and lower electrodes sandwiching the workpieces from above and below, the electrical heating power supply for energizing between the electrodes.

また、本発明の連続焼成炉において、好ましくは、前記下部電極は昇降駆動可能に構成されており、前記トレーは、下部電極が非接触で通過可能な貫通孔を有するトレー本体と、該貫通孔に上方から嵌合して支持され且つ被処理品を載置する導電性の載置部とからなり、前記通電加熱装置は、被処理品が下部電極の上方位置にあるときに、該下部電極を上昇させて前記載置部とともに被処理品を押し上げ、これを上部電極との間に挟持するとともにトレー本体と載置部とを電気的に絶縁状態とした上で、被処理品を通電加熱する。 In the continuous firing furnace of the present invention, preferably, the lower electrode is configured to be driven up and down, and the tray includes a tray body having a through hole through which the lower electrode can pass in a non-contact manner, and the through hole. And a conductive mounting portion that is supported by being fitted from above and on which the product to be processed is mounted, and the energization heating device is configured such that when the product to be processed is located above the lower electrode, the lower electrode Is lifted up to push up the article to be treated together with the placement part, and is sandwiched between the upper electrode and the tray body and the placing part are electrically insulated, and then the article to be treated is heated by energization. To do .

また、本発明の連続焼成炉において、好ましくは、前記トレーは被処理品を幅方向に複数載置できるように構成され、前記通電加熱装置は、幅方向に並ぶ被処理品の数に対応して幅方向に複数配設される。 In the continuous firing furnace of the present invention, preferably, the tray is configured so that a plurality of articles to be processed can be placed in the width direction, and the electric heating device corresponds to the number of articles to be processed arranged in the width direction. A plurality of them are arranged in the width direction.

また、本発明の連続焼成方法は、被処理品の焼成を行う処理室内に被処理品を載置した複数のトレーを順次間欠的に送り込んで、複数の被処理品を連続的に焼成する連続焼成方法であって、被処理品を載置した複数のトレーが上流側から下流側に向かって内部を通過し得るように形成された加熱室を、前記処理室内に設け、前記加熱室は、炉長方向において互いに異なる位置に設けられた複数の加熱区域を有し、前記加熱室内に被処理品を加熱するヒータを設け、前記加熱室内で特定の被処理品を通電加熱する複数の通電加熱装置を、それぞれ前記複数の加熱区域に設け、特定の被処理品を、上流側の前記加熱区域にて上流側の前記通電加熱装置により通電加熱した後、下流側の前記加熱区域へ搬送し、下流側の前記加熱区域にて下流側の前記通電加熱装置により通電加熱できるようになっており、被処理品を、前記ヒータにより加熱するとともに、前記通電加熱装置により、特定の被処理品を通電加熱する、ことを特徴とする。
The continuous firing method of the present invention is a continuous firing method in which a plurality of trays on which a product to be processed is placed are sequentially and intermittently fed into a processing chamber for firing the product to be processed, and the plurality of products to be processed are continuously fired. In the firing method, a heating chamber formed so that a plurality of trays on which an article to be processed is placed can pass through the interior from the upstream side toward the downstream side is provided in the processing chamber, A plurality of heating zones that have a plurality of heating zones provided at positions different from each other in the furnace length direction, are provided with a heater that heats the product to be processed in the heating chamber, and that heats a specific product to be processed in the heating chamber An apparatus is provided in each of the plurality of heating zones, and a specific article to be processed is heated by the upstream heating zone in the upstream heating zone, and then conveyed to the downstream heating zone. In front of the downstream side in the heating section on the downstream side Being adapted to be energized heating by resistance heating apparatus, the workpieces, as well as heated by the heater, by the electrical heating device, for electrically heating a particular workpieces, it is characterized.

また、本発明の連続焼成方法において、好ましくは、前記被処理品を、その上下に配置された上部及び下部の電極間に挟持し、該電極間に通電することにより被処理品を通電加熱する。 Further, in the continuous firing method of the present invention, preferably, the workpieces, and clamped between the upper and lower arranged upper and lower electrodes, energizing heating the treated product by energizing between the electrodes .

また、本発明の連続焼成方法において、好ましくは、前記下部電極を昇降駆動可能に構成し、前記トレーを、該下部電極が非接触で通過可能な貫通孔を有するトレー本体と、該貫通孔に上方から嵌合して支持され且つ被処理品を載置する導電性の載置部とから構成されるものとし、被処理品が下部電極の上方位置にあるときに、該下部電極を上昇させて前記載置部とともに被処理品を押し上げ、これを上部電極との間に挟持するとともにトレー本体と載置部とを電気的に絶縁状態とした上で、被処理品を通電加熱する。 In the continuous firing method of the present invention, preferably, the lower electrode is configured to be driven up and down, and the tray has a tray body having a through-hole through which the lower electrode can pass in a non-contact manner, and the through-hole. It is composed of a conductive mounting portion that is fitted and supported from above and places the product to be processed. When the product to be processed is located above the lower electrode, the lower electrode is raised. pushing up a workpiece with the mounting section Te, which the mounting part and the tray main body on which the electrically insulated state while sandwiched between the upper electrode and electrically heating the workpieces.

また、本発明の連続焼成方法において、好ましくは、前記トレーを、被処理品を幅方向に複数載置できるように構成し、前記通電加熱を、幅方向に並ぶ複数の被処理品のうちの全部又は一部に対して行う。 In the continuous firing method of the present invention, preferably, the tray is configured so that a plurality of articles to be processed can be placed in the width direction, and the energization heating is performed among the plurality of articles to be processed arranged in the width direction. Do this for all or part of it .

また、本発明の連続焼成方法において、好ましくは、前記被処理品を導電性発熱体からなるケースに収容し、これを前記上部及び下部の電極間に挟持して通電加熱する。
In the continuous firing method of the present invention, preferably, the article to be processed is accommodated in a case made of a conductive heating element, which is sandwiched between the upper and lower electrodes and heated by conduction.

本発明の連続焼成炉及び連続焼成方法によれば、ヒータによる輻射過熱に加え、急速加熱を行いたい特定の被処理品を通電加熱することにより、特定の被処理品を任意の加熱区域で急速加熱することができる。また、炉長方向に複数の通電加熱装置を配置することにより、加熱室内の複数の加熱区域において通電加熱を行うことができ、これにより、多様な熱処理曲線を実現し、多品種の焼成品を生産することができる。 According to the continuous firing furnace and the continuous firing method of the present invention, in addition to radiant overheating by a heater, a specific target product to be rapidly heated is energized and heated, whereby a specific target product can be rapidly heated in an arbitrary heating zone. Can be heated. In addition, by arranging a plurality of current heating devices in the furnace length direction, it is possible to conduct current heating in a plurality of heating zones in the heating chamber, thereby realizing various heat treatment curves and producing various types of fired products. Can be produced.

また、被処理品を上部及び下部の電極間に挟みこみ、電極間に通電することにより被処理品を通電加熱することができる。また、下部電極を昇降駆動可能に構成し、下部電極を上昇させることで、上部及び下部の電極で挟持された被処理品を通電加熱することができ、同時に被処理品をトレー本体や炉内のその他の部位から電気的に絶縁させ、通電電流の損失を防止できる。 Further, the product to be processed can be energized and heated by sandwiching the product to be processed between the upper and lower electrodes and energizing the electrodes. In addition, the lower electrode can be driven up and down, and by raising the lower electrode, the product to be processed sandwiched between the upper and lower electrodes can be energized and heated. It is possible to electrically insulate from other parts of the current to prevent loss of energization current.

また、トレーを、被処理品を幅方向に複数載置できるように構成し、この幅方向に並ぶ複数の被処理品に対応する数の通電加熱装置を幅方向に複数設け、この被処理品のうちの全部又は一部に対して通電加熱を行うようにすることで、幅方向に並ぶ複数の被処理品に対しても同時に通電加熱を行うことができる。これにより、製品の生産性を大幅に向上させることができる。また、幅方向に並ぶ複数の被処理品に通電加熱を要するもの、通電加熱を要しないもの、導電性を有しないものがそれぞれ混在している場合であっても、これらに対応した適切な処理を行うことができる。 Further, the tray is configured so that a plurality of products to be processed can be placed in the width direction, and a plurality of current heating devices corresponding to the plurality of products to be processed arranged in the width direction are provided in the width direction. By conducting current heating on all or a part of them, current heating can be performed simultaneously on a plurality of products to be processed arranged in the width direction. Thereby, the productivity of the product can be greatly improved. In addition, even if a plurality of products to be processed arranged in the width direction include those that require current heating, those that do not require current heating, and those that do not have conductivity, appropriate processing corresponding to these It can be performed.

また、導電性のない被処理品に対しては、被処理品を導電性発熱体からなるケースに収容し、これを上部及び下部の電極間で挟持して通電することで、ケース自体が発熱することにより被処理品の急速加熱が図られる。 For non-conductive products, the case itself is heated by encasing the product in a case made of a conductive heating element and holding it between the upper and lower electrodes. By doing so, the article to be processed can be rapidly heated.

このように、本発明の連続焼成炉及び連続焼成方法によれば、被処理品の加熱速度を任意の加熱区域で自由に変化させ、多様な熱処理曲線を実現することにより、多品種の焼成品を生産することができるという優れた効果が得られる。 As described above, according to the continuous firing furnace and the continuous firing method of the present invention, a variety of fired products can be obtained by freely changing the heating rate of the product to be treated in any heating zone and realizing various heat treatment curves. The excellent effect that can be produced is obtained.

以下、本発明の好適な実施の形態を添付図面に基づいて詳細に説明する。なお、各図において、同一部分には同一符号を付し、重複した説明を省略する。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In each figure, the same portions are denoted by the same reference numerals, and redundant description is omitted.

図１〜図６は、本発明の連続焼成炉および連続焼成方法の第１の実施形態を示すものである。図１に示すように、この連続焼成炉は、被処理品１を載置したトレー２が通過可能な装入脱気室１２と、装入脱気室１２に接続され内部に処理室１５を形成するチャンバ１４と、処理室１５内に設置された断熱壁１８と、断熱壁１８に囲まれて形成された加熱室２０内に設置されたヒータと、加熱室２０内で被処理品１を通電加熱する複数の通電加熱装置２４（２４Ａ，２４Ｂ，２４Ｃ）と、処理室１５の出側に接続され、かつ処理室１５内を通過したトレー２が通過可能な抽出脱気室１６と、処理室１５内のほぼ全長にわたってトレー２の下面に接するように支持した複数のフリーローラ３２とを備えている。 FIGS. 1-6 shows 1st Embodiment of the continuous baking furnace and continuous baking method of this invention. As shown in FIG. 1, this continuous baking furnace includes a charging / degassing chamber 12 through which a tray 2 on which an article 1 to be processed is placed can pass, and a processing chamber 15 connected to the charging / degassing chamber 12. The chamber 14 to be formed, the heat insulating wall 18 installed in the processing chamber 15, the heater installed in the heating chamber 20 surrounded by the heat insulating wall 18, and the article 1 to be processed in the heating chamber 20 A plurality of electric heating devices 24 (24A, 24B, 24C) for electric heating, an extraction deaeration chamber 16 that is connected to the outlet side of the processing chamber 15 and through which the tray 2 that has passed through the processing chamber 15 can pass, and processing A plurality of free rollers 32 supported so as to be in contact with the lower surface of the tray 2 over almost the entire length in the chamber 15 are provided.

被処理品１は、グラファイト、セラミックス、金属等の導電性発熱体であり、通電により内部抵抗で発熱する材料からなる。 The article to be processed 1 is a conductive heating element such as graphite, ceramics, or metal, and is made of a material that generates heat with an internal resistance when energized.

装入脱気室１２及び抽出脱気室１６は、トレー２搬送方向の上流側と下流側のそれぞれに昇降可能な開閉扉１３ａ，１３ｂ，１７ａ，１７ｂを有している。これら開閉扉１３ａ，１３ｂ，１７ａ，１７ｂを下降位置にすると、装入脱気室１２、処理室１５、抽出脱気室１６の気密が保持される状態になり、反対に上昇位置にすると、トレー２が通過可能な状態となる。開閉扉１３ａ，１３ｂ，１７ａ，１７ｂは、この例では、扉とこれを昇降させるシリンダ及びロック機構（図示せず）からなるが、これらに代えて、その他の周知の構造を採用することもできる。また、挿入脱気室１２及び抽出脱気室１６の内部は、処理室１５と同じ雰囲気に置換できるようになっている。 The charging deaeration chamber 12 and the extraction deaeration chamber 16 have open / close doors 13a, 13b, 17a, and 17b that can be raised and lowered on the upstream side and the downstream side in the tray 2 conveyance direction, respectively. When these open / close doors 13a, 13b, 17a, 17b are in the lowered position, the charging / deaeration chamber 12, the processing chamber 15, and the extraction deaeration chamber 16 are kept airtight. 2 can pass through. In this example, the open / close doors 13a, 13b, 17a, and 17b include a door, a cylinder that raises and lowers the door, and a lock mechanism (not shown), but other well-known structures may be employed instead. . Further, the inside of the insertion degassing chamber 12 and the extraction degassing chamber 16 can be replaced with the same atmosphere as the processing chamber 15.

処理室１５は、装入脱気室１２と抽出脱気室１６のそれぞれに連通し、かつ、開閉扉１３ｂ，１７ａ以外には外部と連通する開口部がなく、内部の密閉状態を保持できるように構成されている。 The processing chamber 15 communicates with each of the charging / deaeration chamber 12 and the extraction deaeration chamber 16, and there is no opening communicating with the outside except for the open / close doors 13 b and 17 a, so that the internal sealed state can be maintained. It is configured.

断熱壁１８は、肉厚の薄く内部高さの低い入側部１８ａ及び出側部１８ｃと、肉厚の厚く且つ内部高さの高い中央部１８ｂとから構成され、中央部１８ｂの内部両側には炉長方向のほぼ全域にわたって被処理品１を加熱できる上下方向に延びる複数のヒータ１９が設置されており、これにより断熱壁１８の中央部１８ｂ内部に加熱室２０が形成され、ヒータ１９により被処理品１が加熱される。肉厚の薄い入側部１８ａの内部は予熱室２１として機能し、出側部１８ｃ及びその下流側の処理室１５内は冷却室２２として機能する。この断熱壁１８の素材には、耐熱性に優れた黒鉛を用いている。 The heat insulating wall 18 is composed of an inlet side portion 18a and an outlet side portion 18c having a small thickness and a low internal height, and a central portion 18b having a large thickness and a high internal height. Is provided with a plurality of heaters 19 extending in the vertical direction that can heat the workpiece 1 over almost the entire region in the furnace length direction, whereby a heating chamber 20 is formed inside the central portion 18 b of the heat insulating wall 18. The workpiece 1 is heated. The inside of the thin inlet side portion 18 a functions as the preheating chamber 21, and the outlet side portion 18 c and the processing chamber 15 downstream thereof function as the cooling chamber 22. As the material of the heat insulating wall 18, graphite having excellent heat resistance is used.

また、この連続焼成炉は、更に、処理室１５内を窒素ガス、アルゴンガス、ハロゲンガス又は真空に選択的に保持したままで、かつ装入脱気室１２及び抽出脱気室１６内を処理室１５と同じ雰囲気に随時置換する雰囲気保持置換装置（図示せず）を備えている。 Further, the continuous firing furnace further treats the inside of the charging deaeration chamber 12 and the extraction deaeration chamber 16 while selectively keeping the inside of the processing chamber 15 in nitrogen gas, argon gas, halogen gas or vacuum. An atmosphere holding / replacement device (not shown) that replaces the same atmosphere as the chamber 15 as needed is provided.

プッシャー装置３６及びプラー装置３７は、水平移動する部材の一部に下流に向かうときにのみ係合する係合部材を有するものであり、トレー２を上流側から押し込んで複数のトレー２を並んだ状態で間欠的に搬送することができ、或いは単一のトレー２を下流側から引き込んで所定のストロークを間欠的に搬送することができる。なお、かかるプッシャー装置３６及びプラー装置３７は、上記の特許文献１に開示されたプッシャー又はプラーと同一の構成でもよく、その他の周知の一方向間欠搬送機構であってもよい。 The pusher device 36 and the puller device 37 have an engaging member that engages only with a part of the horizontally moving member when going downstream, and the tray 2 is pushed in from the upstream side to arrange a plurality of trays 2. It can be conveyed intermittently in a state, or a single tray 2 can be pulled in from the downstream side and a predetermined stroke can be conveyed intermittently. The pusher device 36 and the puller device 37 may have the same configuration as the pusher or puller disclosed in the above-mentioned Patent Document 1, or may be another known one-way intermittent conveyance mechanism.

図２は図１のＸ−Ｘ線における断面図である。同図に示すように、通電加熱装置２４は、被処理品１を上下から挟持する上部及び下部の電極２５，２６と、この電極２５，２６間にケーブル２９を介して通電する通電加熱用電源３０とを備えている。上部及び下部の電極２５，２６は、チャンバ１４及び断熱壁１８の上下を貫通して、その先端部が加熱室２０内に突出して設けられている。この電極２５，２６の素材には、導電性、耐熱性に優れた黒鉛を用いている。 2 is a cross-sectional view taken along line XX in FIG. As shown in the drawing, the energization heating device 24 includes upper and lower electrodes 25 and 26 that sandwich the workpiece 1 from above and below, and an energization heating power source that energizes the electrodes 25 and 26 via a cable 29. 30. The upper and lower electrodes 25, 26 pass through the top and bottom of the chamber 14 and the heat insulating wall 18, and their tips protrude into the heating chamber 20. As the material for the electrodes 25 and 26, graphite having excellent conductivity and heat resistance is used.

上部電極２５及び下部電極２６は、チャンバ１４及び断熱壁１８との間で所定間隔をあけて、これらに貫通している。上部電極２５の上端部にはフランジ部が設けられ、フランジ部とチャンバ１４上端部との間には電気的絶縁性及びシール性を有する絶縁シール部材２７ａが介装されている。下部電極２６とチャンバ１４との間にも同様に絶縁シール部材２７ｂが介装されている。これにより、上部及び下部の電極２５，２６と、チャンバ１４及び断熱壁１８とは電気的に絶縁され、且つこれらの間からの外気の混入がシールされる。 The upper electrode 25 and the lower electrode 26 penetrate the chamber 14 and the heat insulating wall 18 with a predetermined gap therebetween. A flange portion is provided at the upper end portion of the upper electrode 25, and an insulating seal member 27 a having electrical insulation and sealing properties is interposed between the flange portion and the upper end portion of the chamber 14. Similarly, an insulating seal member 27 b is interposed between the lower electrode 26 and the chamber 14. As a result, the upper and lower electrodes 25, 26 are electrically insulated from the chamber 14 and the heat insulating wall 18, and outside air from between them is sealed.

また、下部電極２６はチャンバ１４の下方に設けられた電極昇降装置３９により昇降駆動されるようになっている。この電極昇降装置３９は、この例では直動シリンダであるが、その他周知の直動装置を用いることもできる。なお、下部電極２６と電極昇降装置３９との間には絶縁部材２７ｃが介装されている。 The lower electrode 26 is driven up and down by an electrode lifting device 39 provided below the chamber 14. The electrode lifting / lowering device 39 is a linear motion cylinder in this example, but other known linear motion devices can also be used. An insulating member 27 c is interposed between the lower electrode 26 and the electrode lifting device 39.

フリーローラ３２は、断熱壁１８の内底面に立設した支柱３２ａの上端に設けられたブラケット３２ｂに枢支されて、処理室１５内のほぼ全長にわたって多数配置されている。このフリーローラ３２の列は、トレー２下面の幅方向両端部分のそれぞれにフリーローラ３２が接するように、トレー２幅方向に２条並べて配置されている。また、装入脱気室１２及び抽出脱気室１６内には、フリーローラ３３，３４が上述したフリーローラ３２と同様な支柱構造でトレー２下面に接するように配置されている。 A number of free rollers 32 are pivotally supported by a bracket 32 b provided at the upper end of a support column 32 a erected on the inner bottom surface of the heat insulation wall 18, and a large number of free rollers 32 are arranged over the entire length in the processing chamber 15. Two rows of the free rollers 32 are arranged side by side in the width direction of the tray 2 so that the free rollers 32 are in contact with both ends of the lower surface of the tray 2 in the width direction. Further, in the charging and deaeration chamber 12 and the extraction deaeration chamber 16, free rollers 33 and 34 are disposed so as to contact the lower surface of the tray 2 with the same column structure as the above-described free roller 32.

図３は、本発明に使用するトレー２の構成を示すものである。同図に示すように、トレー２は、方形平板状のトレー本体２ａと、円盤状の導電性を有する載置部２ｂとから構成されている。トレー本体２ａは、下部電極が非接触で通過できる程度の大きさの貫通孔３を有している。載置部２ｂはトレー本体２ａの貫通孔に上方から嵌合して支持され且つその上に被処理品１を載置するようになっている。載置部２ｂは、黒鉛等の耐熱材料からなるのが良い。また、載置部２ｂのトレー本体２ａと嵌合する外周面はテーパ状に形成され、これに対応してトレー本体２ａの載置部２ｂと嵌合する内周面はテーパ状に形成されており、これによりトレー本体２ａと載置部２ｂとの嵌合性を向上させている。 FIG. 3 shows the configuration of the tray 2 used in the present invention. As shown in the figure, the tray 2 is composed of a rectangular flat plate-like tray main body 2a and a disc-shaped conductive mounting portion 2b. The tray body 2a has a through-hole 3 having a size that allows the lower electrode to pass through without contact. The placing portion 2b is supported by being fitted into the through hole of the tray main body 2a from above, and the workpiece 1 is placed thereon. The mounting portion 2b is preferably made of a heat resistant material such as graphite. Further, the outer peripheral surface that fits with the tray main body 2a of the mounting portion 2b is formed in a taper shape, and the inner peripheral surface that fits with the mounting portion 2b of the tray main body 2a is formed in a tapered shape. Thus, the fitting property between the tray main body 2a and the placing portion 2b is improved.

図４は、通電加熱装置２４により被処理品１を通電加熱する様子を説明する図である。（ａ）はトレー２の搬送時、（ｂ）は通電加熱時を示している。通電加熱装置２４は、図４（ａ）のように被処理品１が下部電極２６の上方に位置したときに、下部電極２６を上昇させて載置部２ｂとともに被処理品１を押し上げ、図４（ｂ）のように、これを上部電極２５との間に挟持するとともにトレー本体２ａと載置部２ｂとを電気的に絶縁状態とする。そして、この状態で、通電加熱用電源３０により上部及び下部の電極２５，２６間に通電して、被処理品１を通電加熱する。 FIG. 4 is a diagram for explaining a state in which the workpiece 1 is heated and energized by the energization heating device 24. (A) shows the time of carrying the tray 2, and (b) shows the time of current heating. When the workpiece 1 is positioned above the lower electrode 26 as shown in FIG. 4A, the electric heating device 24 raises the lower electrode 26 and pushes up the workpiece 1 together with the mounting portion 2b. As shown in FIG. 4B, this is sandwiched between the upper electrode 25 and the tray body 2a and the placing portion 2b are electrically insulated. In this state, the current to be processed 1 is heated by energization between the upper and lower electrodes 25 and 26 by the energization heating power source 30.

被処理品１が導電性を有しないものである場合もある。そのような場合は、図５に示すように導電性発熱体からなるケース４０に被処理品１を収容し、これを上部及び下部の電極２５，２６間で挟持して通電することで、ケース４０自体が発熱することにより被処理品１を加熱することができる。このケース４０の素材としては、黒鉛、ＳｉＣ等を用いている。 In some cases, the article to be processed 1 is not conductive. In such a case, as shown in FIG. 5, the product 1 is housed in a case 40 made of a conductive heating element, which is sandwiched between the upper and lower electrodes 25 and 26 and energized. When the 40 itself generates heat, the article to be processed 1 can be heated. As a material of the case 40, graphite, SiC, or the like is used.

次に、この連続焼成炉を用いた連続焼成方法について図１を参照して説明する。連続焼成炉を稼動させるときには、開閉扉１３ａ，１３ｂ，１７ａ，１７ｂを閉じた状態で処理室１５内に不活性ガスを充填し、ヒータを作動させて加熱室２０内を予め設定されている温度まで加熱する。 Next, a continuous firing method using this continuous firing furnace will be described with reference to FIG. When the continuous baking furnace is operated, the processing chamber 15 is filled with an inert gas with the open / close doors 13a, 13b, 17a, and 17b closed, and the heater is operated to set the temperature in the heating chamber 20 in advance. Until heated.

次いで、被処理品１が載置されているトレー２を装入脱気室１２へ搬入し、開閉扉１３ａを閉じて装入脱気室１２内の空気を外部へ排出するとともに不活性ガスを充填して処理室１５と同じ雰囲気にする。続いて、開閉扉１３ｂを開き、プッシャー装置３６によってトレー２を予熱室２１へ押し込み、開閉扉１３ｂを閉じる。これにより、予熱室２１に押し込まれたトレー２に載置された被処理品１は所定の時間をかけて徐々に昇温されていく。 Next, the tray 2 on which the article to be processed 1 is placed is carried into the charging / degassing chamber 12, the open / close door 13a is closed, the air in the charging / degassing chamber 12 is discharged to the outside, and the inert gas is discharged. The atmosphere is the same as that of the processing chamber 15 by filling. Subsequently, the opening / closing door 13b is opened, the tray 2 is pushed into the preheating chamber 21 by the pusher device 36, and the opening / closing door 13b is closed. Thereby, the article to be processed 1 placed on the tray 2 pushed into the preheating chamber 21 is gradually heated over a predetermined time.

所定のタクト時間が経過した後、上述したような手順で、別のトレー２を装入脱気室１２から予熱室２１へ押し込み、このトレー２によって既に予熱室２１に押し込まれているトレー２を加熱室２０へ向かって押し出す。これにより、加熱室２０に押し込まれたトレー２に載置された被処理品１は所定の時間加熱される。このような動作を順次間欠的に繰り返す。なお、本実施の形態ではタクト時間は１０分である。 After a predetermined tact time has elapsed, another tray 2 is pushed from the charging / degassing chamber 12 into the preheating chamber 21 by the procedure described above, and the tray 2 already pushed into the preheating chamber 21 by this tray 2 is inserted. Extrusion toward the heating chamber 20 Thereby, the article 1 to be processed placed on the tray 2 pushed into the heating chamber 20 is heated for a predetermined time. Such an operation is repeated intermittently. In this embodiment, the tact time is 10 minutes.

ここで、図６は被処理品に要求される熱処理曲線を示したものであり、横軸に時間［ｍｉｎ］、縦軸に温度［℃］をとっている。図中Ｌ１はヒータのみによる通常の熱処理曲線を示し、Ｌ２、Ｌ３は特定の被処理品に要求される熱処理曲線を示している。 Here, FIG. 6 shows a heat treatment curve required for the product to be processed, with the horizontal axis representing time [min] and the vertical axis representing temperature [° C.]. In the figure, L1 indicates a normal heat treatment curve using only a heater, and L2 and L3 indicate heat treatment curves required for a specific product to be processed.

さて、順次間欠的に被処理品１を載置したトレー２が搬送されてくる過程において、図６のＬ２ような熱処理曲線が要求される特定の被処理品１が通電加熱装置２４Ｂの上部及び下部の電極間にきたならば、図４で説明したような動作によって上部及び下部の電極２５，２６間で被処理品１を挟み込んで通電加熱する。これにより、特定の被処理品１に対して、通電加熱装置２４Ｂの位置（図中Ｂの時間）において急速加熱することができ、図６のＬ２のような熱処理曲線を実現することができる。なお、この例では被処理品１は通電加熱により２５００℃まで加熱される。 Now, in the process in which the tray 2 on which the article 1 to be processed is placed intermittently is conveyed, the specific article 1 to which the heat treatment curve such as L2 in FIG. If it comes between the lower electrodes, the workpiece 1 is sandwiched between the upper and lower electrodes 25 and 26 by the operation described in FIG. Thereby, it is possible to rapidly heat the specific article 1 to be processed at the position of the electric heating device 24B (time B in the figure), and it is possible to realize a heat treatment curve like L2 in FIG. In this example, the product 1 is heated to 2500 ° C. by energization heating.

また、他の加熱区域に配置された通電加熱装置２４Ａ、２４Ｃを更に使用して、Ｌ３のような熱処理曲線が要求される特定の被処理品１に対して通電加熱することにより、図６のＡ、Ｂ、Ｃの時間において急速加熱を行い、Ｌ３のような熱処理曲線を実現することも可能である。 Further, by further using the current heating devices 24A and 24C arranged in other heating zones to heat the specific workpiece 1 requiring a heat treatment curve such as L3, the current flow shown in FIG. It is also possible to perform rapid heating in the time of A, B, and C to realize a heat treatment curve like L3.

このように、特定の被処理品１に関し単一又は複数の加熱区域において急速加熱が必要な場合に、かかる急速加熱が必要な加熱区域に通電加熱装置２４を設置し、これにより通電加熱を行うことにより、特定の被処理品１を任意の加熱区域で急速加熱し、多様な熱処理曲線を実現することが可能となる。 In this way, when rapid heating is required in a single or a plurality of heating zones for a specific article 1 to be processed, the energization heating device 24 is installed in the heating zone in which such rapid heating is necessary, and thereby energization heating is performed. As a result, it is possible to rapidly heat a specific article 1 to be processed in an arbitrary heating zone and realize various heat treatment curves.

被処理品１が導電性を有しないものである場合は、図５に示したように、導電性発熱体からなるケース４０に被処理品１を収容し、これを上部及び下部の電極２５，２６間で挟持して通電することで、ケース４０自体が発熱することにより被処理品１を加熱することができる。 When the article 1 to be processed is not conductive, as shown in FIG. 5, the article 1 is accommodated in a case 40 made of a conductive heating element, and the upper and lower electrodes 25, Since the case 40 itself generates heat by being held between 26 and energized, the workpiece 1 can be heated.

時間の経過に伴い、被処理品１を載置したトレー２は加熱室２０から押し出されて冷却室２２へ押し込まれる。これにより、被処理品１は冷却室２２で所定の時間をかけて徐々に冷却される。そうして、さらに冷却室２２内を進行して処理室１５内の最下流側まで進んだならば、開閉扉１７ｂを閉じた状態で開閉扉１７ａを開き、プラー装置３７によってトレー２を冷却室２２から抽出脱気室１６内へ引き込み、開閉扉１７ａを閉じた後、開閉扉１７ｂを開いてトレー２を外部へ取り出す。 As time passes, the tray 2 on which the product 1 is placed is pushed out of the heating chamber 20 and pushed into the cooling chamber 22. Thereby, the article 1 to be processed is gradually cooled in the cooling chamber 22 over a predetermined time. Then, after further proceeding in the cooling chamber 22 and proceeding to the most downstream side in the processing chamber 15, the opening / closing door 17 a is opened with the opening / closing door 17 b closed, and the tray 2 is cooled by the puller device 37. After drawing into the extraction deaeration chamber 16 from 22 and closing the open / close door 17a, the open / close door 17b is opened and the tray 2 is taken out.

このように、本発明の第１の実施形態では、ヒータ１９による輻射加熱に加え、急速加熱を行いたい特定の被処理品１を通電加熱することにより、特定の被処理品１を任意の加熱区域で急速加熱することができる。これにより、多様な熱処理曲線を実現し、多品種の焼成品を生産することが可能となる。 As described above, in the first embodiment of the present invention, in addition to the radiant heating by the heater 19, the specific object to be processed 1 to be rapidly heated is energized and heated to arbitrarily heat the specific object to be processed 1. Can be heated rapidly in the area. As a result, various heat treatment curves can be realized, and various types of fired products can be produced.

また、被処理品１を上部及び下部の電極２５，２６間に挟みこみ、電極２５，２６間に通電することにより被処理品１を通電加熱することができる。また、下部電極２６を昇降駆動可能に構成し、下部電極２６を上昇させることで、上部及び下部の電極２５，２６で挟持された被処理品１を通電加熱することができ、同時に被処理品１をトレー本体２ａや炉内のその他の部位から電気的に絶縁させることにより通電電流の損失を防止できる。 Further, the article to be processed 1 can be energized and heated by sandwiching the article 1 to be processed between the upper and lower electrodes 25 and 26 and energizing the electrodes 25 and 26. Further, the lower electrode 26 can be driven up and down, and by raising the lower electrode 26, the workpiece 1 sandwiched between the upper and lower electrodes 25 and 26 can be energized and heated, and at the same time the workpiece to be processed. By electrically insulating 1 from the tray body 2a and other parts in the furnace, it is possible to prevent loss of energization current.

また、導電性のない被処理品１に対しては、被処理品１を導電性発熱体からなるケースに４０収容し、これを上部及び下部の電極２５，２６間で挟持して通電することで、ケース４０自体が発熱することにより被処理品１の急速加熱が図られる。 Further, for the non-conductive object 1 to be processed, the object to be processed 1 is accommodated in a case made of a conductive heating element, which is sandwiched between the upper and lower electrodes 25 and 26 and energized. Thus, when the case 40 itself generates heat, the workpiece 1 is rapidly heated.

したがって、本発明の第１の実施形態による連続焼成炉及び連続焼成方法によれば、被処理品１の加熱速度を任意の加熱区域で自由に変化させ、多様な熱処理曲線を実現することにより、多品種の焼成品を生産することができるという優れた効果が得られる。 Therefore, according to the continuous baking furnace and the continuous baking method according to the first embodiment of the present invention, by freely changing the heating rate of the article 1 to be processed in an arbitrary heating zone, and realizing various heat treatment curves, An excellent effect that a variety of baked products can be produced is obtained.

次に、本発明の第２の実施形態による連続焼成炉及び連続焼成方法について説明する。図７及び図８は、本発明の連続焼成炉および連続焼成方法の第２の実施形態を示すものである。 Next, a continuous baking furnace and a continuous baking method according to the second embodiment of the present invention will be described. 7 and 8 show a second embodiment of the continuous firing furnace and continuous firing method of the present invention.

本実施の形態では、トレー２上に二つの被処理品１を並べて載置して、これを処理室１５内に、被処理品１が搬送方向に対して幅方向に二つ並置される状態で投入し、上述した第１の実施形態と同様にして被処理品１の焼成を行う。 In this embodiment, two processed products 1 are placed side by side on the tray 2, and two processed products 1 are juxtaposed in the width direction with respect to the transport direction in the processing chamber 15. The product 1 is fired in the same manner as in the first embodiment described above.

図７は、本発明の第２の実施形態による連続焼成炉の断面図であって、図１のＸ−Ｘ線における断面図である図２に相当するものである。同図に示すように、この連続焼成炉は、幅方向に二つの独立した通電加熱装置２４及び電極昇降装置３９を備えている。また、フリーローラ３２の列は幅方向に三つ設けられており、トレー２下面の幅方向両端部のそれぞれと幅方向中央部においてフリーローラ３２が接して支持されるようになっている。 FIG. 7 is a cross-sectional view of a continuous firing furnace according to the second embodiment of the present invention, and corresponds to FIG. 2 which is a cross-sectional view taken along line XX of FIG. As shown in the figure, the continuous firing furnace includes two independent energization heating devices 24 and an electrode lifting device 39 in the width direction. In addition, three rows of free rollers 32 are provided in the width direction, and the free rollers 32 are supported in contact with each of both end portions in the width direction of the lower surface of the tray 2 and in the center portion in the width direction.

図８は、本発明の第２の実施形態に使用するトレー２の構成を示すものである。同図に示すように、トレー２は、長方形平板状のトレー本体２ａと、二つの載置部２ｂとから構成されている。トレー本体２ａは通電加熱装置２４の下部電極が非接触で通過できる程度の大きさの貫通孔３を二つ有しており、この二つの貫通孔３のそれぞれに載置部２ｂが嵌合して支持されるようになっている。本実施形態による連続焼成炉のその他の構成は、第１の実施形態とほぼ同様である。 FIG. 8 shows the configuration of the tray 2 used in the second embodiment of the present invention. As shown in the figure, the tray 2 includes a tray body 2a having a rectangular flat plate shape and two placement portions 2b. The tray body 2a has two through holes 3 large enough to allow the lower electrode of the energization heating device 24 to pass through in a non-contact manner, and the placement portion 2b is fitted in each of the two through holes 3. Has come to be supported. Other configurations of the continuous firing furnace according to the present embodiment are substantially the same as those of the first embodiment.

次に、この連続焼成炉を用いた連続焼成方法について説明する。加熱室２０内の加熱、被処理品１の装入脱気室１２への搬入、予熱室２１、加熱室２０、冷却室２２への搬送、及び抽出脱気室１６への搬入については上述した第１の実施の形態と同様であるので説明は省略する。 Next, a continuous firing method using this continuous firing furnace will be described. The heating in the heating chamber 20, the carrying-in of the workpiece 1 into the charging / deaeration chamber 12, the transport to the preheating chamber 21, the heating chamber 20, the cooling chamber 22, and the loading into the extraction deaeration chamber 16 have been described above. Since it is the same as that of 1st Embodiment, description is abbreviate | omitted.

加熱室２０内で、順次間欠的に被処理品１を載置したトレー２が搬送されてくる過程において、例えば、図６のＬ２のような熱処理曲線が要求される特定の被処理品１が通電加熱装置２２ｂの上部及び下部の電極間にきたならば、図４で説明したような動作によって上部及び下部の電極間で幅方向に並ぶ二つの被処理品１を挟み込んで通電加熱する。これにより、特定の被処理品１に対して、通電加熱装置２４Ｂの位置（図１参照。）において急速加熱することができ、図６のＬ２のような熱処理曲線を実現することができる。また、搬送方向の別の位置に配置された通電加熱装置を併用することにより、図６のＬ３のような熱処理曲線を実現することもできる。 In the process in which the tray 2 on which the article to be processed 1 is placed is intermittently conveyed in the heating chamber 20, for example, a specific article to be processed 1 requiring a heat treatment curve such as L2 in FIG. If it comes between the upper and lower electrodes of the energization heating device 22b, the two workpieces 1 arranged in the width direction are sandwiched between the upper and lower electrodes by the operation as described in FIG. Thereby, the specific article 1 to be processed can be rapidly heated at the position of the energization heating device 24B (see FIG. 1), and a heat treatment curve like L2 in FIG. 6 can be realized. Moreover, the heat treatment curve like L3 of FIG. 6 is also realizable by using together the electrical heating apparatus arrange | positioned in the other position of the conveyance direction.

また、幅方向に並ぶ二つの被処理品１の一方は通電加熱の併用による急速加熱が必要であるが、他方は通電加熱を要しないという場合であっても、通電加熱用電源３０及び電極昇降装置３９は、それぞれ独立しているため、一方の被処理品１に対しては通電加熱を行うが、他方の被処理品１に対しては通電加熱を行わないという処理も可能である。 Moreover, even if one of the two workpieces 1 arranged in the width direction requires rapid heating by the combined use of energization heating, the other does not require energization heating. Since the devices 39 are independent of each other, it is possible to perform a process in which the one article to be processed 1 is energized and heated, but the other article 1 is not energized and heated.

さらに、一方の被処理品１が導電性を有しないものであるときは、導電性を有しない一方の被処理品１を図５で説明したケースに収容することにより、一方の通電加熱装置では上部と下部の電極間で被処理品１を収容したケースを挟み込み、これを通電加熱し、他方の通電加熱装置では上部と下部の電極間で直接被処理品１を挟み込み、これを通電加熱する、というような処理を行うことも可能である。なお、図７はこのような場合の通電加熱の様子を示している。 Further, when one of the articles 1 to be processed is not conductive, the one article to be processed 1 having no conductivity is accommodated in the case described with reference to FIG. The case containing the article 1 to be processed is sandwiched between the upper and lower electrodes, and this is energized and heated. In the other energization heating apparatus, the article 1 to be treated is directly sandwiched between the upper and lower electrodes, and this is energized and heated. It is also possible to perform a process such as. FIG. 7 shows the state of energization heating in such a case.

なお、本実施の形態では、トレー２上に被処理品１を幅方向に二つ並べて載置するものとしたが、必要に応じてこれ以上の被処理品１を載置するようにしても良い。この場合には、被処理品１の数に対応するトレー構造を採用し、通電加熱装置２４、電極昇降装置３９もこれに対応して設ける。 In the present embodiment, two articles 1 to be processed are placed side by side in the width direction on the tray 2, but more pieces to be processed 1 may be placed as necessary. good. In this case, a tray structure corresponding to the number of articles to be processed 1 is adopted, and the energization heating device 24 and the electrode lifting / lowering device 39 are also provided correspondingly.

このように、本発明の第２の実施形態によれば、第１の実施形態による効果に加え、幅方向に並ぶ複数の被処理品１に対しても同時に通電加熱を行うことができるため、製品の生産性が大幅に向上するという効果が得られる。また、幅方向に並ぶ複数の被処理品１に通電加熱を要するもの、通電加熱を要しないもの、導電性を有しないものがそれぞれ混在している場合であっても、それぞれの通電加熱装置及び電極昇降装置は独立しているため、これらに対応した適切な処理を行うことができるという効果が得られる。 As described above, according to the second embodiment of the present invention, in addition to the effects of the first embodiment, it is possible to simultaneously perform current heating on a plurality of objects to be processed 1 arranged in the width direction. The product productivity is greatly improved. Further, even when a plurality of articles 1 to be processed arranged in the width direction are required to be electrically heated, those that do not require current heating, and those that do not have conductivity are mixed, Since the electrode lifting / lowering device is independent, an effect that appropriate processing corresponding to these can be performed is obtained.

なお、本発明は上述した実施の形態に限定されず、本発明の要旨を逸脱しない範囲で種々の変更を加え得ることは勿論である。 In addition, this invention is not limited to embodiment mentioned above, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

本発明の連続焼成炉の全体構成図である。It is a whole block diagram of the continuous baking furnace of this invention. 図１のＸ−Ｘ線における断面図である。It is sectional drawing in the XX line of FIG. 本発明の第１の実施形態に係るトレーの構成を示す図である。It is a figure which shows the structure of the tray which concerns on the 1st Embodiment of this invention. 本発明における通電加熱装置により被処理品を通電加熱する様子を示す図である。It is a figure which shows a mode that a to-be-processed item is electrically heated by the electrical heating apparatus in this invention. 本発明における通電加熱装置により被処理品をケースに収容して通電加熱する様子を示す図である。It is a figure which shows a mode that the to-be-processed goods are accommodated in a case by the electricity heating apparatus in this invention, and are heated by electricity. 被処理品の熱処理曲線を示す図である。It is a figure which shows the heat processing curve of to-be-processed goods. 本発明の第２の実施形態を示す断面図である。It is sectional drawing which shows the 2nd Embodiment of this invention. 本発明の第２の実施形態に係るトレーの構造を示す図である。It is a figure which shows the structure of the tray which concerns on the 2nd Embodiment of this invention. 従来の連続焼成炉の全体構成図である。It is a whole block diagram of the conventional continuous baking furnace.

符号の説明Explanation of symbols

１被処理品
２トレー
２ａトレー本体
２ｂ載置部
３貫通孔
１２装入脱気室
１３ａ，１３ｂ開閉扉
１４チャンバ
１５処理室
１６抽出脱気室
１７ａ，１７ｂ開閉扉
１８断熱壁
１９ヒータ
２０加熱室
２１予熱室
２２冷却室
２４，２４ａ，２４ｂ，２４ｃ通電加熱装置
２５上部電極
２６下部電極
２７ａ，２７ｂ絶縁シール部材
２８ａ，２８ｂ端子
２８ｃ絶縁部材
２９ケーブル
３０通電加熱用電源
３２，３３，３４フリーローラ
３２ａ支柱
３２ｂブラケット
３６プッシャー装置
３７プラー装置
３９電極昇降装置
４０ケース DESCRIPTION OF SYMBOLS 1 To-be-processed object 2 Tray 2a Tray main body 2b Placement part 3 Through-hole 12 Loading deaeration chamber 13a, 13b Opening / closing door 14 Chamber 15 Processing chamber 16 Extraction deaeration chamber 17a, 17b Opening / closing door 18 Heat insulation wall 19 Heater 20 Heating chamber 21 Preheating chamber 22 Cooling chambers 24, 24a, 24b, 24c Electric heating device 25 Upper electrode 26 Lower electrodes 27a, 27b Insulating seal members 28a, 28b Terminal 28c Insulating member 29 Cable 30 Electric power source 32, 33, 34 Free roller 32a Post 32b Bracket 36 Pusher device 37 Puller device 39 Electrode lifting device 40 Case

Claims

被処理品の焼成を行う処理室内に被処理品を載置した複数のトレーを順次間欠的に送り込んで、複数の被処理品を連続的に焼成する連続焼成炉であって、
前記処理室内に設けられ、被処理品を載置した複数のトレーが上流側から下流側に向かって内部を通過し得るように形成された加熱室と、
該加熱室内に設けられ、被処理品を加熱するヒータと、
前記加熱室内で特定の被処理品を通電加熱する複数の通電加熱装置と、を備え、
前記加熱室は、炉長方向において互いに異なる位置に設けられた複数の加熱区域を有し、
前記複数の通電加熱装置は、それぞれ前記複数の加熱区域に設けられ、
特定の被処理品を、上流側の前記加熱区域にて上流側の前記通電加熱装置により通電加熱した後、下流側の前記加熱区域へ搬送し、下流側の前記加熱区域にて下流側の前記通電加熱装置により通電加熱できるようになっている、ことを特徴とする連続焼成炉。 A continuous firing furnace that sequentially and intermittently feeds a plurality of trays on which a product to be processed is placed into a processing chamber that performs baking of the product to be processed,
A heating chamber provided in the processing chamber and formed such that a plurality of trays on which the workpieces are placed can pass from the upstream side toward the downstream side;
A heater provided in the heating chamber for heating the article to be processed;
A plurality of energization heating devices for energizing and heating a specific article to be treated in the heating chamber,
The heating chamber has a plurality of heating zones provided at different positions in the furnace length direction,
The plurality of current heating devices are respectively provided in the plurality of heating zones,
A specific article to be treated is heated and heated by the upstream heating device in the upstream heating zone, and then transported to the downstream heating zone, and downstream in the downstream heating zone. A continuous firing furnace characterized in that it can be electrically heated by an electrical heating device.

前記ヒータは、上流側の前記加熱区域から下流側の前記加熱区域のぼぼ全域にわたって設けられている、ことを特徴とする請求項１に記載の連続焼成炉。 2. The continuous firing furnace according to claim 1, wherein the heater is provided over the entire area of the heating section on the downstream side from the heating section on the upstream side.

前記通電加熱装置は、被処理品を上下から挟持する上部及び下部の電極と、該電極間に通電する通電加熱用電源とを備える、ことを特徴とする請求項１または２に記載の連続焼成炉。 The continuous firing according to claim 1 or 2, wherein the energization heating device includes upper and lower electrodes for sandwiching the article to be processed from above and below, and a power supply for energization heating that energizes between the electrodes. Furnace.

前記下部電極は昇降駆動可能に構成されており、
前記トレーは、下部電極が非接触で通過可能な貫通孔を有するトレー本体と、該貫通孔に上方から嵌合して支持され且つ被処理品を載置する導電性の載置部とからなり、
前記通電加熱装置は、被処理品が下部電極の上方位置にあるときに、該下部電極を上昇させて前記載置部とともに被処理品を押し上げ、これを上部電極との間に挟持するとともにトレー本体と載置部とを電気的に絶縁状態とした上で、被処理品を通電加熱する、ことを特徴とする請求項３に記載の連続焼成炉。 The lower electrode is configured to be driven up and down,
The tray includes a tray main body having a through-hole through which the lower electrode can pass in a non-contact manner, and a conductive placement portion that is supported by being fitted into the through-hole from above and on which a workpiece is placed. ,
When the article to be processed is located above the lower electrode, the energizing heating device raises the lower electrode to push up the article to be processed together with the mounting portion, and sandwiches it between the upper electrode and the tray. The continuous firing furnace according to claim 3, wherein the article to be processed is energized and heated after the main body and the mounting portion are electrically insulated.

前記トレーは被処理品を幅方向に複数載置できるように構成され、
前記通電加熱装置は、幅方向に並ぶ被処理品の数に対応して幅方向に複数配設される、ことを特徴とする請求項１乃至４のいずれかに記載の連続焼成炉。 The tray is configured so that a plurality of articles to be processed can be placed in the width direction,
The continuous firing furnace according to any one of claims 1 to 4, wherein a plurality of the electric heating devices are arranged in the width direction corresponding to the number of articles to be processed arranged in the width direction.

被処理品の焼成を行う処理室内に被処理品を載置した複数のトレーを順次間欠的に送り込んで、複数の被処理品を連続的に焼成する連続焼成方法であって、
被処理品を載置した複数のトレーが上流側から下流側に向かって内部を通過し得るように形成された加熱室を、前記処理室内に設け、前記加熱室は、炉長方向において互いに異なる位置に設けられた複数の加熱区域を有し、
前記加熱室内に被処理品を加熱するヒータを設け、
前記加熱室内で特定の被処理品を通電加熱する複数の通電加熱装置を、それぞれ前記複数の加熱区域に設け、特定の被処理品を、上流側の前記加熱区域にて上流側の前記通電加熱装置により通電加熱した後、下流側の前記加熱区域へ搬送し、下流側の前記加熱区域にて下流側の前記通電加熱装置により通電加熱できるようになっており、
被処理品を、前記ヒータにより加熱するとともに、
前記通電加熱装置により、特定の被処理品を通電加熱する、ことを特徴とする連続焼成方法。 A continuous baking method in which a plurality of trays on which a product to be processed is placed in a processing chamber for baking the product to be processed is intermittently sent sequentially, and a plurality of products to be processed are continuously fired.
A heating chamber formed so that a plurality of trays on which workpieces are placed can pass from the upstream side toward the downstream side is provided in the processing chamber, and the heating chambers are different from each other in the furnace length direction. Having a plurality of heating zones provided in position,
A heater for heating the article to be processed is provided in the heating chamber,
A plurality of energization heating devices for energizing and heating a specific article to be processed in the heating chamber are provided in the plurality of heating zones, respectively, and the specific article to be processed is heated upstream in the heating zone. After energization heating by the apparatus, it is conveyed to the heating area on the downstream side, and can be energized and heated by the energization heating apparatus on the downstream side in the heating area on the downstream side,
While heating the article to be processed by the heater,
A continuous firing method characterized in that a specific article to be treated is heated by current using the current heating device.

前記被処理品を、その上下に配置された上部及び下部の電極間に挟持し、該電極間に通電することにより被処理品を通電加熱する、ことを特徴とする請求項６に記載の連続焼成方法。 7. The continuous article according to claim 6 , wherein the article to be treated is sandwiched between upper and lower electrodes arranged above and below, and the article to be treated is energized and heated by energizing the electrodes. Firing method.

前記下部電極を昇降駆動可能に構成し、
前記トレーを、該下部電極が非接触で通過可能な貫通孔を有するトレー本体と、該貫通孔に上方から嵌合して支持され且つ被処理品を載置する導電性の載置部とから構成されるものとし、
被処理品が下部電極の上方位置にあるときに、該下部電極を上昇させて前記載置部とともに被処理品を押し上げ、これを上部電極との間に挟持するとともにトレー本体と載置部とを電気的に絶縁状態とした上で、被処理品を通電加熱する、ことを特徴とする請求項７に記載の連続焼成方法。 The lower electrode is configured to be driven up and down,
The tray includes a tray body having a through-hole through which the lower electrode can pass in a non-contact manner, and a conductive placement portion that is supported by being fitted into the through-hole from above and places an object to be processed. Shall consist of
When the article to be processed is located above the lower electrode, the lower electrode is raised to push up the article to be processed together with the placement section, and is sandwiched between the upper electrode and the tray body and the placement section. The continuous firing method according to claim 7 , wherein the product to be processed is heated by energization after making the material electrically insulated.

前記トレーを、被処理品を幅方向に複数載置できるように構成し、
前記通電加熱を、幅方向に並ぶ複数の被処理品のうちの全部又は一部に対して行う、ことを特徴とする請求項６乃至８のいずれかに記載の連続焼成方法。 The tray is configured so that a plurality of articles to be processed can be placed in the width direction,
The continuous firing method according to any one of claims 6 to 8 , wherein the electric heating is performed on all or a part of a plurality of articles to be processed arranged in the width direction.

前記被処理品を導電性発熱体からなるケースに収容し、これを前記上部及び下部の電極間に挟持して通電加熱する、ことを特徴とする請求項６乃至９のいずれかに記載の連続焼成方法。 The continuous product according to any one of claims 6 to 9 , wherein the article to be processed is accommodated in a case made of a conductive heating element, and is energized and heated while being sandwiched between the upper and lower electrodes. Firing method.