JP2000146448A - Continuous heat treatment method, and heat treatment furnace - Google Patents
Continuous heat treatment method, and heat treatment furnaceInfo
- Publication number
- JP2000146448A JP2000146448A JP10327486A JP32748698A JP2000146448A JP 2000146448 A JP2000146448 A JP 2000146448A JP 10327486 A JP10327486 A JP 10327486A JP 32748698 A JP32748698 A JP 32748698A JP 2000146448 A JP2000146448 A JP 2000146448A
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- transport mechanism
- heat treatment
- section
- transport
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、被処理材を連続的
に搬送しつつ熱処理する連続熱処理方法と、その方法の
実施に供することのできる連続熱処理炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous heat treatment method in which a material to be treated is continuously conveyed and heat treated, and a continuous heat treatment furnace capable of performing the method.
【０００２】[0002]
【従来の技術】被処理材を連続的に搬送しつつ熱処理す
る連続熱処理炉においては、熱処理部内における酸素濃
度の変動防止のために水素ガス等の雰囲気ガスが導入さ
れる。その雰囲気ガスは高価であることから、熱処理部
の出入口に雰囲気ガスカーテンや、ステンレス線やステ
ンレス箔等のカーテンが設けられ、消費量の節約が図ら
れている。2. Description of the Related Art In a continuous heat treatment furnace for performing heat treatment while continuously transporting a material to be treated, an atmosphere gas such as hydrogen gas is introduced in order to prevent a change in oxygen concentration in a heat treatment part. Since the atmosphere gas is expensive, an atmosphere gas curtain or a curtain such as a stainless wire or a stainless steel foil is provided at the entrance and exit of the heat treatment unit to reduce consumption.
【０００３】[0003]
【発明が解決しようとする課題】しかし、出入口の開口
寸法が大きくなると雰囲気ガス消費量が増大する。特
に、雰囲気ガスカーテンを設けた場合、被処理材の高さ
が高い場合は雰囲気ガスの消費量が増大する。また、ス
テンレス線やステンレス箔等のカーテンは、被処理材に
接触して品質を悪化させる。また、被処理材の搬送速度
は熱処理を行うため低速であることから、被処理材の出
入りに要する時間が長くなり、雰囲気ガスの消費量が増
大する。However, as the size of the opening of the entrance increases, the amount of gas consumed in the atmosphere increases. In particular, when the atmosphere gas curtain is provided, and when the material to be processed is high, the consumption of the atmosphere gas increases. Further, curtains such as stainless steel wires and stainless steel foils are in contact with the material to be treated and deteriorate the quality. In addition, since the transfer speed of the material to be processed is low because the heat treatment is performed, the time required for the material to be processed in and out increases, and the consumption of the atmosphere gas increases.
【０００４】本発明は、上記問題を解決することのでき
る連続熱処理方法および熱処理炉を提供することを目的
とする。An object of the present invention is to provide a continuous heat treatment method and a heat treatment furnace that can solve the above-mentioned problems.
【０００５】[0005]
【課題を解決するための手段】本発明方法は、導入側パ
ージ部に導入された被処理材を、雰囲気ガスが導入され
る熱処理部を経て排出側パージ部から排出するまで、連
続的に搬送しつつ熱処理する方法であって、被処理材を
導入側パージ部内に導入し、その被処理材が導入された
導入側パージ部内を、その導入側パージ部の入口と熱処
理部との接続口とを閉鎖した状態で、ガスパージまたは
真空パージし、次に、その導入側パージ部と熱処理部と
の接続口を開いて熱処理部内に被処理材を導入し、その
熱処理部内に導入された被処理材を搬送しつつ熱処理
し、その熱処理部から排出側パージ部に被処理材を排出
する前に、その排出側パージ部内を、その排出側パージ
部の出口と熱処理部との接続口とを閉鎖した状態で、ガ
スパージまたは真空パージし、次に、その熱処理部と排
出側パージ部との接続口を開いて排出側パージ部内に被
処理材を排出し、次に、その被処理材を排出側パージ部
から外部に排出するに際して、被処理材の導入側パージ
部内と排出側パージ部内での搬送速度を、熱処理部内の
熱処理領域における搬送速度よりも高速とし、その熱処
理部内において、被処理材の搬送速度を熱処理領域に至
る前に減速すると共に熱処理領域を過ぎた後に増速する
ことを特徴とする。According to the method of the present invention, the material to be treated introduced into the introduction side purge section is continuously conveyed until it is discharged from the discharge side purge section through the heat treatment section into which the atmospheric gas is introduced. A method of performing a heat treatment while introducing a material to be treated into the introduction-side purge portion, and introducing the inside of the introduction-side purge portion into which the material to be treated is introduced, with the inlet of the introduction-side purge portion and the connection port between the heat treatment portion and In a state where is closed, gas purge or vacuum purge is performed, then the connection port between the introduction side purge section and the heat treatment section is opened to introduce the material to be treated into the heat treatment section, and the material introduced into the heat treatment section Before discharging the material to be processed from the heat-treating section to the discharge-side purge section, the inside of the discharge-side purge section was closed with the outlet of the discharge-side purge section and the connection port with the heat-treating section. Gas purge or vacuum in condition Next, the connection port between the heat treatment section and the discharge side purge section is opened to discharge the material to be processed into the discharge side purge section, and then the material to be processed is discharged from the discharge side purge section to the outside. In carrying out the process, the transfer speed of the material to be processed in the introduction side purge section and the discharge side purge section is set to be higher than the transfer speed in the heat treatment area in the heat treatment section. It is characterized by decelerating before reaching and increasing speed after passing the heat treatment region.
【０００６】本発明方法によれば、被処理材を導入側パ
ージ部内に導入する時、導入側パージ部と熱処理部との
接続口を閉鎖することで、熱処理部への外気の拡散は防
止される。その被処理材が導入された導入側パージ部内
をガスパージまたは真空パージする時、その導入側パー
ジ部の入口と熱処理部との接続口とを閉鎖することで、
熱処理部への外気の拡散は防止される。そのガスパージ
または真空パージ後に、導入側パージ部と熱処理部との
接続口から熱処理部内に被処理材が導入されるので、熱
処理部内への外気拡散が防止され、熱処理部内の酸素濃
度変動が防止される。また、排出側パージ部に被処理材
を排出する前に、排出側パージ部内をガスパージまたは
真空パージする時、その排出側パージ部の出口と熱処理
部との接続口とを閉鎖することで、熱処理部への外気の
拡散は防止される。そのガスパージまたは真空パージ後
に、排出側パージ部と熱処理部との接続口から排出側パ
ージ部内に被処理材が排出されるので、熱処理部内への
外気拡散が防止され、熱処理部内の酸素濃度変動が防止
される。被処理材を排出側パージ部から外部に排出する
時、排出側パージ部と熱処理部との接続口を閉鎖するこ
とで、熱処理部への外気の拡散は防止される。被処理材
の導入側パージ部内と排出側パージ部内での搬送速度
を、熱処理部内での熱処理領域における搬送速度よりも
高速とし、その熱処理部内において、被処理材の搬送速
度を熱処理領域に至る前に減速すると共に熱処理領域を
過ぎた後に増速する、被処理材の導入側パージ部から熱
処理部への導入時と、熱処理部から排出側パージ部への
排出時において、熱処理領域におけるよりも搬送速度を
高速にし、熱処理部への外気の拡散をより防止でき、さ
らに、本体内からの熱の逃げを防止すると共にスループ
ットを向上できる。According to the method of the present invention, when the material to be treated is introduced into the introduction-side purge section, the connection between the introduction-side purge section and the heat treatment section is closed, whereby the diffusion of outside air into the heat treatment section is prevented. You. When performing gas purging or vacuum purging inside the introduction-side purge section into which the material to be treated has been introduced, by closing the inlet of the introduction-side purge section and the connection port with the heat treatment section,
Diffusion of outside air to the heat treatment part is prevented. After the gas purge or the vacuum purge, the material to be treated is introduced into the heat treatment section from the connection port between the introduction-side purge section and the heat treatment section, so that outside air diffusion into the heat treatment section is prevented, and the oxygen concentration fluctuation in the heat treatment section is prevented. You. In addition, when the material to be treated is discharged to the discharge-side purge section before gas purging or vacuum-purging the discharge-side purge section, the outlet of the discharge-side purge section and the connection port with the heat-treating section are closed, so that the heat-treatment The diffusion of outside air to the part is prevented. After the gas purge or the vacuum purge, the material to be treated is discharged into the discharge side purge section from the connection port between the discharge side purge section and the heat treatment section, so that the outside air is prevented from diffusing into the heat treatment section, and the oxygen concentration fluctuation in the heat treatment section is reduced. Is prevented. When the material to be treated is discharged from the discharge-side purge section to the outside, the connection between the discharge-side purge section and the heat treatment section is closed, whereby diffusion of outside air to the heat treatment section is prevented. The transfer speed of the material to be processed in the introduction side purge section and the discharge side purge section is set to be higher than the transfer speed in the heat treatment area in the heat treatment section. During the introduction of the material to be treated from the introduction side purge section to the heat treatment section and the discharge from the heat treatment section to the discharge side purge section, the material is transported more than in the heat treatment area. By increasing the speed, it is possible to further prevent the diffusion of the outside air to the heat treatment section, and further to prevent the escape of heat from inside the main body and improve the throughput.
【０００７】本発明の連続熱処理炉は、雰囲気ガスが導
入される熱処理部と、その熱処理部に接続される導入側
パージ部と、その熱処理部に接続される排出側パージ部
と、その導入側パージ部の入口、その導入側パージ部と
熱処理部との接続口、その熱処理部と排出側パージ部と
の接続口、および排出側パージ部の出口の開閉手段と、
その導入側パージ部内を、ガスパージまたは真空パージ
する手段と、その排出側パージ部内を、ガスパージまた
は真空パージする手段と、その導入側パージ部内におい
て被処理材を搬送する第１搬送機構と、その熱処理部内
の導入側において前記第１搬送機構から受渡された被処
理材を搬送する第２搬送機構と、その熱処理部内の導入
側と排出側との間の熱処理領域において前記第２搬送機
構から受渡された被処理材を搬送する第３搬送機構と、
その熱処理部内の排出側において前記第３搬送機構から
受渡された被処理材を搬送する第４搬送機構と、その排
出側パージ部内において前記第４搬送機構から受渡され
た被処理材を搬送する第５搬送機構とを備える。前記第
１、第５搬送機構の搬送速度は前記第３搬送機構の搬送
速度よりも高速とされ、前記第２搬送機構の搬送速度
は、前記第１搬送機構から被処理材を受渡される時は前
記第３搬送機構に被処理材を受渡す時よりも高速とさ
れ、前記第４搬送機構の搬送速度は、前記第３搬送機構
から被処理材を受渡される時は前記第５搬送機構に被処
理材を受渡す時よりも低速とされる。本発明の連続熱処
理炉によれば本発明方法を実施できる。[0007] The continuous heat treatment furnace of the present invention comprises a heat treatment section to which an atmospheric gas is introduced, an introduction side purge section connected to the heat treatment section, a discharge side purge section connected to the heat treatment section, and an introduction side purge section. Opening and closing means of an inlet of the purge unit, a connection port between the introduction side purge unit and the heat treatment unit, a connection port between the heat treatment unit and the discharge side purge unit, and an outlet of the discharge side purge unit,
Means for purging gas or vacuum in the introduction-side purge section, means for purging gas or vacuum in the discharge-side purge section, a first transport mechanism for transporting the material to be processed in the introduction-side purge section, A second transport mechanism that transports the material to be processed delivered from the first transport mechanism on the introduction side in the unit, and a second transport mechanism that is delivered from the second transport mechanism in a heat treatment region between the introduction side and the discharge side in the heat treatment unit. A third transport mechanism for transporting the processed material,
A fourth transport mechanism for transporting the workpiece transferred from the third transport mechanism on the discharge side in the heat treatment section, and a fourth transport mechanism for transporting the workpiece transferred from the fourth transport mechanism in the discharge-side purge section. 5 transport mechanism. The transport speeds of the first and fifth transport mechanisms are set to be higher than the transport speed of the third transport mechanism, and the transport speed of the second transport mechanism is determined when the workpiece is transferred from the first transport mechanism. Is set to be faster than when the material to be processed is delivered to the third transport mechanism, and the transport speed of the fourth transport mechanism is set to be higher when the material to be processed is delivered from the third transport mechanism. At a lower speed than when the material is delivered. According to the continuous heat treatment furnace of the present invention, the method of the present invention can be performed.
【０００８】本発明の連続熱処理炉において、被処理材
の第１搬送機構から第２搬送機構への受渡し時に、その
第２搬送機構の搬送速度は第１搬送機構の搬送速度に同
期され、被処理材の第２搬送機構から第３搬送機構への
受渡し時に、その第２搬送機構の搬送速度は第３搬送機
構の搬送速度に同期され、被処理材の第３搬送機構から
第４搬送機構への受渡し時に、その第４搬送機構の搬送
速度は第３搬送機構の搬送速度に同期され、被処理材の
第４搬送機構から第５搬送機構への受渡し時に、その第
４搬送機構の搬送速度は第５搬送機構の搬送速度に同期
されるのが好ましい。これにより被処理材を円滑に搬送
できる。In the continuous heat treatment furnace of the present invention, when the material to be processed is transferred from the first transport mechanism to the second transport mechanism, the transport speed of the second transport mechanism is synchronized with the transport speed of the first transport mechanism, and When the processing material is transferred from the second transport mechanism to the third transport mechanism, the transport speed of the second transport mechanism is synchronized with the transport speed of the third transport mechanism, and the third transport mechanism transfers the workpiece from the third transport mechanism to the fourth transport mechanism. When the workpiece is transferred from the fourth transport mechanism to the fifth transport mechanism, the transport speed of the fourth transport mechanism is synchronized with the transport speed of the third transport mechanism. The speed is preferably synchronized with the transport speed of the fifth transport mechanism. This allows the material to be processed to be smoothly transported.
【０００９】前記第１、第３、第５搬送機構は、周回駆
動される無端体により被処理材を搬送するコンベヤによ
り構成され、前記第２、第４搬送機構は、搬送方向の間
隔をおいて並列する複数のローラーにより被処理材を搬
送するコンベヤにより構成され、その第２搬送機構にお
ける複数のローラーは、低速回転駆動されるものと高速
回転駆動されるものとを有し、その低速回転駆動される
ローラーは高速回転駆動されるローラーよりも第３搬送
機構寄りに配置され、その第４搬送機構における複数の
ローラーは、低速回転駆動されるものと高速回転駆動さ
れるものとを有し、その低速回転駆動されるローラーは
高速回転駆動されるローラーよりも第３搬送機構寄りに
配置されるのが好ましい。この構成によれば、被処理材
を第１搬送機構から第２搬送機構に高速回転駆動される
ローラーを介して受渡し、次に低速回転駆動されるロー
ラーを介して第３搬送機構に受渡し、次に第３搬送機構
から第４搬送機構に低速回転駆動されるローラーを介し
て受渡し、次に高速回転駆動されるローラーを介して第
５搬送機構に受渡すことができる。これにより、各搬送
機構間での被処理材の受渡しを円滑に行うことができ
る。しかも、複数の被処理材の熱処理を行う場合に、前
方の被処理材を第２搬送機構から第３搬送機構に受渡す
と同時に、後方の被処理材を第１搬送機構から第２搬送
機構に受渡し、また、前方の被処理材を第４搬送機構か
ら第５搬送機構に受渡すと同時に、後方の被処理材を第
３搬送機構から第４搬送機構に受渡すことが可能にな
り、搬送効率を向上できる。その第１、第５搬送機構を
チェーンコンベヤにより構成し、第３搬送機構をメッシ
ュベルトコンベヤにより構成することで、製造コストの
低減を図ることができる。The first, third, and fifth transport mechanisms are constituted by conveyors for transporting the material to be processed by an endless body that is driven to rotate, and the second and fourth transport mechanisms are spaced apart in the transport direction. And a plurality of rollers in the second transport mechanism, the plurality of rollers being driven at a low speed and the one being driven at a high speed. The driven roller is disposed closer to the third transport mechanism than the high-speed rotationally driven roller, and the plurality of rollers in the fourth transport mechanism include a low-speed rotationally driven roller and a high-speed rotationally driven roller. It is preferable that the roller driven at low speed be disposed closer to the third transport mechanism than the roller driven at high speed. According to this configuration, the material to be processed is transferred from the first transfer mechanism to the second transfer mechanism via the roller driven at high speed, then transferred to the third transfer mechanism via the roller driven at low speed, and Can be transferred from the third transfer mechanism to the fourth transfer mechanism via a roller driven at a low speed, and then transferred to the fifth transfer mechanism via a roller driven at a high speed. Thereby, delivery of the to-be-processed material between each conveyance mechanism can be performed smoothly. In addition, when performing heat treatment on a plurality of workpieces, the front workpiece is delivered from the second transport mechanism to the third transport mechanism, and the rear workpiece is transported from the first transport mechanism to the second transport mechanism. At the same time, the front material to be processed is transferred from the fourth transport mechanism to the fifth transport mechanism, and simultaneously, the rear material to be processed is transferred from the third transport mechanism to the fourth transport mechanism. Transport efficiency can be improved. By configuring the first and fifth transport mechanisms by a chain conveyor and configuring the third transport mechanism by a mesh belt conveyor, it is possible to reduce manufacturing costs.
【００１０】[0010]
【発明の実施の形態】図１、図２に示すメッシュベルト
式連続熱処理炉１は、支持台２により支持される熱処理
部３、この熱処理部３に接続される導入側パージ部４お
よび排出側パージ部６、搬送装置７を備える。この熱処
理炉１により、その導入側パージ部４に導入された被処
理材Ｗを、雰囲気ガスが導入される熱処理部３を経て排
出側パージ部６ら排出されるまで、図において左方から
右方に連続的に搬送しつつ熱処理する。なお、本実施形
態では、被処理材Ｗはトレイにセットされた状態で搬送
される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mesh belt type continuous heat treatment furnace 1 shown in FIGS. 1 and 2 has a heat treatment section 3 supported by a support 2, an introduction side purge section 4 connected to the heat treatment section 3, and a discharge side. A purge unit 6 and a transfer device 7 are provided. In the drawing, the material W introduced into the introduction-side purge section 4 is discharged from the discharge-side purge section 6 through the heat treatment section 3 into which the atmospheric gas is introduced until the material W introduced into the introduction-side purge section 4 is discharged from left to right in FIG. And heat-treating it while continuously transporting it. In the present embodiment, the processing target material W is conveyed while being set on a tray.
【００１１】その熱処理部３は、筒状の本体１０と、こ
の本体１０を囲むヒーター１１および冷却体１２を有す
る。その本体１０は、導入部１０ａと、この導入部１０
ａにベローズ１０ｂを介して接続されるマッフル１０ｃ
と、このマッフル１０ｃに接続される排出部１０ｄとか
ら構成される。その本体１０内に窒素、水素等の雰囲気
ガスが、内部酸素濃度を一定に保持するため、例えばマ
ッフル１０ｃから導入部１０ａと排出部１０ｄとに向か
うガス流が生じるように適宜導入される。これにより、
そのマッフル１０ｃ内の酸素濃度は例えば１０ｐｐｍ以
下に保持される。そのマッフル１０ｃ内で被処理材Ｗは
搬送されつつヒーター１１により加熱され、冷却体１２
により冷却されることで熱処理され、そのマッフル１０
ｃの熱変形はベローズ１０ｂにより吸収される。その導
入部１０ａと排出部１０ｄに雰囲気ガスの排気口１０
ｆ、１０ｇが設けられる。The heat treatment section 3 has a cylindrical main body 10 and a heater 11 and a cooling body 12 surrounding the main body 10. The main body 10 includes an introduction portion 10a and the introduction portion 10a.
A muffle 10c connected to a through a bellows 10b
And a discharge unit 10d connected to the muffle 10c. Atmospheric gases such as nitrogen and hydrogen are appropriately introduced into the main body 10 so as to generate a gas flow from the muffle 10c to the inlet 10a and the outlet 10d, for example, in order to keep the internal oxygen concentration constant. This allows
The oxygen concentration in the muffle 10c is kept, for example, at 10 ppm or less. The workpiece W is heated by the heater 11 while being conveyed in the muffle 10c,
The muffle 10
The thermal deformation of c is absorbed by the bellows 10b. The atmosphere gas exhaust port 10 is provided in the introduction portion 10a and the discharge portion 10d.
f, 10 g are provided.
【００１２】その導入側パージ部４の入口の開閉用第１
扉１５、その導入側パージ部４と熱処理部３との接続口
の開閉用第２扉１６、その熱処理部３と排出側パージ部
との接続口の開閉用第３扉１７、および排出側パージ部
の出口の開閉用第４扉１８が設けられている。各扉１
５、１６、１７、１８は、本実施形態ではエアシリンダ
１５ａ、１６ａ、１７ａ、１８ａにより開閉される。A first opening / closing first opening of the inlet of the inlet side purge section 4 is provided.
Door 15, a second door 16 for opening and closing a connection port between the introduction side purge section 4 and the heat treatment section 3, a third door 17 for opening and closing a connection port between the heat treatment section 3 and the discharge side purge section, and a discharge side purge. A fourth door 18 for opening and closing the outlet of the section is provided. Each door 1
In the present embodiment, 5, 16, 17, 18 are opened and closed by air cylinders 15a, 16a, 17a, 18a.
【００１３】その導入側パージ部４はボックス状の筐体
４ａを有し、その筐体４ａにガス導入口４ｂとガス排出
口４ｃとが形成されている。そのガス導入口４ｂから筐
体４ａ内に、雰囲気ガスと同種のガスや他の不活性ガス
をパージガスとして導入すると共に、導入側パージ部４
内のガスをガス排出口４ｃから排出することで、ガスパ
ージを行うことができる。また、そのガス排出口４ｃに
接続される真空ポンプにより筐体４ａから内部ガスを吸
引して排気し、そのガス導入口４ｂから雰囲気ガスと同
種のガスや他の不活性ガスを導入して復圧することで、
真空パージを行うことができる。The inlet-side purge section 4 has a box-shaped housing 4a, in which a gas inlet 4b and a gas outlet 4c are formed. A gas of the same type as the atmospheric gas or another inert gas is introduced as a purge gas into the housing 4a from the gas introduction port 4b, and the introduction side purge unit 4
Gas purge can be performed by discharging the gas inside from the gas discharge port 4c. Further, the internal gas is sucked and exhausted from the housing 4a by a vacuum pump connected to the gas outlet 4c, and a gas of the same kind as the atmospheric gas or another inert gas is introduced from the gas inlet 4b to recover the gas. By pressing
A vacuum purge can be performed.
【００１４】その排出側パージ部６はボックス状の筐体
６ａを有し、その筐体６ａにガス導入口６ｂとガス排出
口６ｃとが形成されている。そのガス導入口６ｂから筐
体６ａ内に、雰囲気ガスと同種のガスや他の不活性ガス
をパージガスとして導入すると共に、排出側パージ部６
内のガスをガス排出口６ｃから排出することで、ガスパ
ージを行うことができる。また、そのガス排出口６ｃに
接続される真空ポンプにより筐体６ａから内部ガスを吸
引して排気し、そのガス導入口６ｂから雰囲気ガスと同
種のガスや他の不活性ガスを導入して復圧することで、
真空パージを行うことができる。The discharge-side purge section 6 has a box-shaped housing 6a, and a gas inlet 6b and a gas outlet 6c are formed in the housing 6a. A gas of the same kind as the atmospheric gas or another inert gas is introduced as a purge gas into the housing 6a from the gas inlet 6b, and the discharge side purge unit 6
Gas purge can be performed by discharging the gas inside from the gas discharge port 6c. Further, the internal gas is sucked and exhausted from the housing 6a by a vacuum pump connected to the gas outlet 6c, and a gas of the same type as the atmospheric gas or another inert gas is introduced from the gas inlet 6b to recover the gas. By pressing
A vacuum purge can be performed.
【００１５】その搬送装置７は、その導入側パージ部４
内において被処理材Ｗを搬送する第１搬送機構２１と、
その熱処理部３の本体１０の導入側において第１搬送機
構２１から受渡された被処理材Ｗを搬送する第２搬送機
構２２と、その熱処理部３の本体１０の導入側と排出側
との間の熱処理領域において第２搬送機構２２から受渡
された被処理材Ｗを搬送する第３搬送機構２３と、その
熱処理部３の本体１０の排出側において第３搬送機構２
３から受渡された被処理材Ｗを搬送する第４搬送機構２
４と、その排出側パージ部６内において第４搬送機構２
４から受渡された被処理材Ｗを搬送する第５搬送機構２
５とを備える。The transfer device 7 includes an introduction-side purge unit 4.
A first transport mechanism 21 for transporting the workpiece W in the inside,
Between the second transport mechanism 22 for transporting the workpiece W transferred from the first transport mechanism 21 on the introduction side of the main body 10 of the heat treatment unit 3 and the introduction side and discharge side of the main body 10 of the heat treatment unit 3 And a third transport mechanism 23 for transporting the workpiece W delivered from the second transport mechanism 22 in the heat treatment area of the main body 10 on the discharge side of the main body 10 of the heat treatment unit 3.
The fourth transport mechanism 2 that transports the material to be processed W delivered from 3
4 and a fourth transport mechanism 2 in the discharge side purge section 6 thereof.
Fifth transport mechanism 2 for transporting the workpiece W delivered from 4
5 is provided.
【００１６】その第１搬送機構２１は、横軸回りに周回
駆動される無端体の外周上面により被処理材Ｗを搬送す
るコンベヤにより構成される。本実施形態では無端体と
してチェーン２１ａを用いるチェーンコンベヤが用いら
れている。この第１搬送機構２１は、支持台２により支
持される第１巻き掛け駆動機構２１ｂによって駆動され
る。The first transport mechanism 21 is constituted by a conveyor for transporting the workpiece W by the upper surface of the endless body driven to rotate around the horizontal axis. In this embodiment, a chain conveyor using a chain 21a as an endless body is used. The first transport mechanism 21 is driven by a first winding drive mechanism 21b supported by the support table 2.
【００１７】その第２搬送機構２２は、搬送方向の間隔
をおいて並列する４本の横軸回りに回転するローラーに
より被処理材Ｗを搬送するローラーコンベヤにより構成
される。その４本のローラーの中で、第１搬送機構２１
側の２本のローラー２２ａは自由回転するものとされ、
第３搬送機構２３側の２本のローラー２２ｂ、２２ｃは
支持台２により支持される第２、第３巻き掛け駆動機構
２２ｄ、２２ｅによって駆動される。その第２巻き掛け
駆動機構２２ｄは、モータ出力回転を第１搬送機構２１
側の回転駆動ローラ２２ｂにクラッチを介して増速して
伝達し、第３巻き掛け駆動機構２２ｅモータは、出力回
転を第３搬送機構２３側の回転駆動ローラ２２ｃにクラ
ッチを介して減速して伝達する。これにより、その回転
駆動される２本のローラー２２ｂ、２２ｃの一方は低速
回転駆動され、他方は高速回転駆動され、低速回転駆動
されるローラー２２ｃは高速回転駆動されるローラー２
２ｂよりも第３搬送機構２３寄りに配置される。The second transport mechanism 22 is constituted by a roller conveyor which transports the workpiece W by four rollers rotating around a horizontal axis arranged in parallel at intervals in the transport direction. Among the four rollers, the first transport mechanism 21
The two rollers 22a on the side rotate freely,
The two rollers 22b and 22c on the third transport mechanism 23 side are driven by second and third winding drive mechanisms 22d and 22e supported by the support table 2. The second winding drive mechanism 22d transmits the motor output rotation to the first transport mechanism 21d.
The third winding drive mechanism 22e motor decelerates the output rotation to the third transport mechanism 23 side rotational drive roller 22c via the clutch, and transmits the output to the third rotational drive roller 22b via the clutch. introduce. As a result, one of the two rollers 22b and 22c driven to rotate is driven to rotate at low speed, the other is driven to rotate at high speed, and the roller 22c driven at low speed is driven by the roller 2c driven at high speed.
It is arranged closer to the third transport mechanism 23 than 2b.
【００１８】その第３搬送機構２３は、横軸回りに周回
駆動される無端体の外周上面により、被処理材Ｗを熱処
理に適した速度で搬送するコンベヤにより構成される。
本実施形態では無端体としてメッシュベルト２３ａを用
いるメッシュベルトコンベヤが用いられている。そのメ
ッシュベルト２３ａは、熱処理部３の本体１０内に配置
される駆動ローラ２３ｃ、従動ローラ２３ｄ、およびフ
リーローラー２３ｅ、２３ｆに巻き掛けられ、その駆動
ローラ２３ｃは支持台２により支持される駆動機構２３
ｂによって駆動される。そのメッシュベルト２３ａの一
部は、上記排気口１０ｆ、１０ｇを介して本体１０の外
部に位置するものとされている。The third transport mechanism 23 is constituted by a conveyor for transporting the workpiece W at a speed suitable for the heat treatment by the outer peripheral upper surface of the endless body driven to rotate around the horizontal axis.
In the present embodiment, a mesh belt conveyor using a mesh belt 23a as an endless body is used. The mesh belt 23a is wound around a driving roller 23c, a driven roller 23d, and free rollers 23e and 23f arranged in the main body 10 of the heat treatment unit 3, and the driving roller 23c is supported by the support base 2 23
b. A part of the mesh belt 23a is located outside the main body 10 through the exhaust ports 10f and 10g.
【００１９】その第４搬送機構２４は、搬送方向の間隔
をおいて並列する４本の横軸回りに回転するローラーに
より被処理材Ｗを搬送するローラーコンベヤにより構成
される。その４本のローラーの中で、第３搬送機構２３
側から１本目と３本目のローラー２４ａは自由回転する
ものとされ、残りの２本のローラー２４ｂ、２４ｃは支
持台２により支持される第４、第５巻き掛け駆動機構２
４ｄ、２４ｅによって駆動される。その第４巻き掛け駆
動機構２４ｄは、モータ出力回転を第５搬送機構２５側
の回転駆動ローラ２４ｂにクラッチを介して増速して伝
達し、第５巻き掛け駆動機構２４ｅは、モータ出力回転
を第３搬送機構２３側の回転駆動ローラ２４ｃにクラッ
チを介して減速して伝達する。これにより、その回転駆
動される２本のローラー２４ｂ、２４ｃの一方は低速回
転駆動され、他方は高速回転駆動され、低速回転駆動さ
れるローラー２４ｃは高速回転駆動されるローラー２４
ｂよりも第３搬送機構２３寄りに配置される。The fourth transport mechanism 24 is composed of a roller conveyor that transports the workpiece W by four rollers rotating around four horizontal axes arranged in parallel at intervals in the transport direction. Among the four rollers, the third transport mechanism 23
The first and third rollers 24a from the side are free to rotate, and the remaining two rollers 24b and 24c are the fourth and fifth winding drive mechanisms 2 supported by the support base 2.
4d and 24e. The fourth winding drive mechanism 24d transmits the motor output rotation to the rotation drive roller 24b on the fifth transport mechanism 25 side at an increased speed via a clutch, and the fifth winding drive mechanism 24e reduces the motor output rotation. The transmission is performed at a reduced speed via a clutch to the rotation drive roller 24c on the third transport mechanism 23 side. Thereby, one of the two rollers 24b and 24c driven to rotate is driven to rotate at a low speed, the other is driven to rotate at a high speed, and the roller 24c driven at a low speed is driven by the roller 24c driven at a high speed.
It is arranged closer to the third transport mechanism 23 than b.
【００２０】その第５搬送機構２５は、横軸回りに周回
駆動される無端体の外周上面により被処理材Ｗを搬送す
るコンベヤにより構成される。本実施形態では無端体と
してチェーン２５ａを用いるチェーンコンベヤが用いら
れている。この第５搬送機構２５は、支持台２により支
持される第６巻き掛け駆動機構２５ｂによって駆動され
る。The fifth transport mechanism 25 is constituted by a conveyor which transports the material to be processed W by the upper peripheral surface of the endless body which is driven to rotate around the horizontal axis. In this embodiment, a chain conveyor using a chain 25a is used as an endless body. The fifth transport mechanism 25 is driven by a sixth winding drive mechanism 25b supported by the support table 2.
【００２１】その第１搬送機構２１と第５搬送機構２５
の搬送速度は、第３搬送機構２３の搬送速度よりも高速
とされている。その第２搬送機構２２の搬送速度は、第
１搬送機構２１から被処理材Ｗを受渡される時は第３搬
送機構２３に被処理材Ｗを受渡す時よりも高速とされて
いる。その第４搬送機構２４の搬送速度は、第３搬送機
構２３から被処理材Ｗを受渡される時は第５搬送機構２
５に被処理材Ｗを受渡す時よりも低速とされている。The first transport mechanism 21 and the fifth transport mechanism 25
Is higher than the transport speed of the third transport mechanism 23. The transport speed of the second transport mechanism 22 is higher when the workpiece W is delivered from the first transport mechanism 21 than when the workpiece W is delivered to the third transport mechanism 23. When the workpiece W is transferred from the third transport mechanism 23, the transport speed of the fourth transport mechanism 24 is set to the fifth transport mechanism 2.
5 is lower than when the workpiece W is delivered.
【００２２】その第１搬送機構２１から第２搬送機構２
２への被処理材Ｗの受渡し当初は、被処理材Ｗは第２搬
送機構２２の自由回転するローラー２２ａにより搬送さ
れ、しかる後に第２巻き掛け駆動機構２２ｄからの回転
伝達により高速回転駆動されるローラー２２ｂにより搬
送される。その第１搬送機構２１による搬送速度と高速
回転駆動されるローラー２２ｂによる搬送速度は等しく
されている。この受渡しの完了前には、低速回転駆動さ
れるローラー２２ｃが自由回転するように、そのローラ
ー２２ｃへの第３巻き掛け駆動機構２２ｅからの回転伝
達は切断される。その被処理材Ｗの第１搬送機構２１か
ら第２搬送機構２２への受渡し完了後であって、第２搬
送機構２２から第３搬送機構２３への受渡し前に、高速
回転駆動されるローラー２２ｂが自由回転するように、
そのローラー２２ｂへの第２巻き掛け駆動機構２２ｄか
らの回転伝達は切断され、第３巻き掛け駆動機構２２ｅ
からの回転伝達により低速回転駆動されるローラー２２
ｃにより被処理材Ｗは搬送される。しかる後に、第２搬
送機構２２から第３搬送機構２３へ被処理材Ｗが受渡さ
れる。これにより、被処理材Ｗの第１搬送機構２１から
第２搬送機構２２への受渡し時に、その第２搬送機構２
２の搬送速度は第１搬送機構２１の搬送速度に同期さ
れ、被処理材Ｗの第２搬送機構２２から第３搬送機構２
３への受渡し時に、その第２搬送機構２２の搬送速度は
第３搬送機構２３の搬送速度に同期される。From the first transport mechanism 21 to the second transport mechanism 2
2, the workpiece W is transported by the freely rotating roller 22a of the second transport mechanism 22, and then is driven to rotate at a high speed by the rotation transmission from the second winding drive mechanism 22d. Rollers 22b. The transport speed of the first transport mechanism 21 is made equal to the transport speed of the roller 22b driven at high speed. Before the completion of the delivery, the rotation transmission from the third winding drive mechanism 22e to the roller 22c is cut off so that the roller 22c driven at a low speed rotates freely. After the delivery of the workpiece W from the first transport mechanism 21 to the second transport mechanism 22 is completed, and before the delivery from the second transport mechanism 22 to the third transport mechanism 23, the roller 22b that is driven to rotate at a high speed is To rotate freely,
The rotation transmission from the second winding drive mechanism 22d to the roller 22b is cut off, and the third winding drive mechanism 22e is cut off.
22 driven at low speed by rotation transmission from the roller 22
The workpiece W is conveyed by c. Thereafter, the workpiece W is delivered from the second transport mechanism 22 to the third transport mechanism 23. Thus, when the workpiece W is transferred from the first transport mechanism 21 to the second transport mechanism 22, the second transport mechanism 2
2 is synchronized with the transport speed of the first transport mechanism 21, and the transport speed of the workpiece W is changed from the second transport mechanism 22 to the third transport mechanism 2.
3, the transfer speed of the second transfer mechanism 22 is synchronized with the transfer speed of the third transfer mechanism 23.
【００２３】その第３搬送機構２３から第４搬送機構２
４への被処理材Ｗの受渡し当初は、被処理材Ｗは第４搬
送機構２４の自由回転するローラー２４ａによる搬送さ
れ、しかる後に第５巻き掛け駆動機構２４ｅからの回転
伝達により低速回転駆動されるローラー２４ｃにより搬
送される。その第３搬送機構２３による搬送速度と低速
回転駆動されるローラー２４ｃによる搬送速度は等しく
されている。この受渡しの完了前には、高速回転駆動さ
れるローラー２４ｂが自由回転するように、そのローラ
ー２４ｂへの第４巻き掛け駆動機構２４ｄからの回転伝
達は切断される。その被処理材Ｗの第３搬送機構２３か
ら第４搬送機構２４への受渡し完了後であって、第４搬
送機構２４から第５搬送機構２５への受渡し前に、低速
回転駆動されるローラー２４ｃが自由回転するように、
そのローラー２４ｃへの第５巻き掛け駆動機構２４ｅか
らの回転伝達は切断され、第４巻き掛け駆動機構２４ｄ
からの回転伝達により高速回転駆動されるローラー２４
ｂにより被処理材Ｗは搬送される。しかる後に、第４搬
送機構２４から第５搬送機構２５へ被処理材Ｗが受渡さ
れる。これにより、被処理材Ｗの第３搬送機構２３から
第４搬送機構２４への受渡し時に、その第４搬送機構２
４の搬送速度は第３搬送機構２３の搬送速度に同期さ
れ、被処理材Ｗの第４搬送機構２４から第５搬送機構２
５への受渡し時に、その第４搬送機構２４の搬送速度は
第５搬送機構２５の搬送速度に同期される。From the third transport mechanism 23 to the fourth transport mechanism 2
At the beginning of the transfer of the workpiece W to the workpiece 4, the workpiece W is transported by the freely rotating roller 24a of the fourth transport mechanism 24, and then is driven to rotate at a low speed by the rotation transmission from the fifth winding drive mechanism 24e. Rollers 24c. The transport speed of the third transport mechanism 23 is made equal to the transport speed of the roller 24c driven at low speed. Before the completion of the delivery, the rotation transmission from the fourth winding drive mechanism 24d to the roller 24b is cut so that the roller 24b driven at high speed rotates freely. After the delivery of the workpiece W from the third transport mechanism 23 to the fourth transport mechanism 24 is completed, and before the delivery from the fourth transport mechanism 24 to the fifth transport mechanism 25, the roller 24c that is driven to rotate at a low speed is provided. To rotate freely,
The rotation transmission from the fifth winding driving mechanism 24e to the roller 24c is cut off, and the fourth winding driving mechanism 24d is cut off.
24 driven at high speed by rotation transmission from the roller 24
The workpiece W is transported by b. Thereafter, the workpiece W is delivered from the fourth transport mechanism 24 to the fifth transport mechanism 25. Thus, when the workpiece W is transferred from the third transport mechanism 23 to the fourth transport mechanism 24, the fourth transport mechanism 2
4 is synchronized with the transport speed of the third transport mechanism 23, and the fourth transport mechanism 24 of the workpiece W is moved from the fifth transport mechanism 2 to the fifth transport mechanism 2.
5, the transfer speed of the fourth transfer mechanism 24 is synchronized with the transfer speed of the fifth transfer mechanism 25.
【００２４】上記構成により熱処理を行うには、先ず被
処理材Ｗを導入側パージ部４に導入する。この導入は第
１搬送機構２１と同一の搬送速度のコンベヤ等により行
うのが好ましい。次に、その被処理材Ｗが導入された導
入側パージ部４内を、その導入側パージ部４の入口と熱
処理部３との接続口とを第１、第２扉１５、１６により
閉鎖した状態で、ガスパージまたは真空パージする。次
に、その導入側パージ部４と熱処理部３との接続口を開
き、第１搬送機構２１から第２搬送機構２２に搬送速度
が同期された状態で被処理材Ｗを受渡すことで、熱処理
部３内に被処理材Ｗを導入する。その熱処理部３内に導
入された被処理材Ｗを、第２搬送機構２２から第３搬送
機構２３に搬送速度が同期された状態で受渡し、その第
３搬送機構２３により第１搬送機構２１よりも低速で搬
送しつつ熱処理する。その第３搬送機構２３から第４搬
送機構２４に搬送速度が同期された状態で受渡された被
処理材Ｗを、熱処理部３から排出側パージ部６に排出す
る前に、その排出側パージ部６内を、その排出側パージ
部６の出口と熱処理部３との接続口とを第３、第４扉１
７、１８により閉鎖した状態で、ガスパージまたは真空
パージする。次に、その熱処理部３と排出側パージ部６
との接続口を開き、第４搬送機構２４から第５搬送機構
２５に搬送速度が同期された状態で被処理材Ｗを受渡す
ことで、排出側パージ部６内に被処理材Ｗを排出する。
次に、排出側パージ部６と熱処理部３との接続口を閉鎖
した状態で、被処理材Ｗを第５搬送機構２５により第３
搬送機構２３よりも高速で排出側パージ部６から排出す
る。なお、第２搬送機構２２、第４搬送機構２４の速度
変更タイミングの制御や各扉１５、１６、１７、１８の
開閉タイミングの制御は、公知の制御機構を用いて行え
ばよく、例えばセンサにより検出した被処理材Ｗの位置
に応じて速度変更や開閉を行えばよい。To perform the heat treatment with the above configuration, first, the material to be treated W is introduced into the introduction-side purge section 4. This introduction is preferably performed by a conveyor or the like having the same transfer speed as the first transfer mechanism 21. Next, the inside of the introduction-side purge section 4 into which the material to be treated W has been introduced, the entrance of the introduction-side purge section 4 and the connection port with the heat treatment section 3 are closed by the first and second doors 15 and 16. In this state, gas purge or vacuum purge is performed. Next, by opening the connection port between the introduction-side purge unit 4 and the heat treatment unit 3, the workpiece W is delivered from the first transport mechanism 21 to the second transport mechanism 22 with the transport speed synchronized. The workpiece W is introduced into the heat treatment unit 3. The workpiece W introduced into the heat treatment unit 3 is transferred from the second transport mechanism 22 to the third transport mechanism 23 in a state where the transport speed is synchronized, and the third transport mechanism 23 transfers the workpiece W from the first transport mechanism 21. Is also heat-treated while being transported at a low speed. Before discharging the workpiece W delivered from the third transport mechanism 23 to the fourth transport mechanism 24 in a state where the transport speed is synchronized with the fourth transport mechanism 24, the discharge side purge unit 6, the outlet of the discharge side purge section 6 and the connection port with the heat treatment section 3 are connected to the third and fourth doors 1.
In the state closed by 7 and 18, gas purge or vacuum purge is performed. Next, the heat treatment section 3 and the discharge side purge section 6
Is opened, and the workpiece W is delivered from the fourth transport mechanism 24 to the fifth transport mechanism 25 in a state where the transport speed is synchronized, thereby discharging the workpiece W into the discharge-side purge unit 6. I do.
Next, in a state where the connection port between the discharge side purge unit 6 and the heat treatment unit 3 is closed, the processing target material W is transported by the fifth transport mechanism 25 to the third position.
It is discharged from the discharge side purge unit 6 at a higher speed than the transport mechanism 23. Note that the control of the speed change timing of the second transport mechanism 22 and the fourth transport mechanism 24 and the control of the opening / closing timing of each of the doors 15, 16, 17, and 18 may be performed using a known control mechanism. The speed may be changed or opened / closed according to the detected position of the workpiece W.
【００２５】上記構成によれば、被処理材Ｗを導入側パ
ージ部４内に導入する時、導入側パージ部４と熱処理部
３との接続口は閉鎖されるので、熱処理部への外気の拡
散は防止される。その被処理材Ｗが導入された導入側パ
ージ部４内をガスパージまたは真空パージする時、その
導入側パージ部４の入口と熱処理部３との接続口とは閉
鎖されるので、熱処理部３への外気の拡散は防止され
る。そのガスパージまたは真空パージ後に、導入側パー
ジ部４と熱処理部３との接続口から熱処理部３内に被処
理材Ｗが導入されるので、熱処理部３内への外気拡散が
防止され、熱処理部３内の酸素濃度変動が防止される。
また、排出側パージ部６に被処理材Ｗを排出する前に、
排出側パージ部６内をガスパージまたは真空パージする
時、その排出側パージ部６の出口と熱処理部３との接続
口とは閉鎖されるので、熱処理部３への外気の拡散は防
止される。そのガスパージまたは真空パージ後に、排出
側パージ部６と熱処理部３との接続口から排出側パージ
部６内に被処理材Ｗが排出されるので、熱処理部３内へ
の外気拡散が防止され、熱処理部３内の酸素濃度変動が
防止される。被処理材Ｗを排出側パージ部６から外部に
排出する時、排出側パージ部６と熱処理部３との接続口
は閉鎖されるので、熱処理部３への外気の拡散は防止さ
れる。被処理材Ｗの導入側パージ部４内と排出側パージ
部６内での搬送速度を、熱処理部３内の熱処理時領域に
おける搬送速度よりも高速とし、その熱処理部３内にお
いて、被処理材Ｗの搬送速度を熱処理領域に至る前に減
速すると共に熱処理領域を過ぎた後に増速するので、被
処理材Ｗの導入側パージ部４から熱処理部３への導入時
と、熱処理部３から排出側パージ部６への排出時におい
て、その熱処理領域におけるよりも搬送速度を高速に
し、熱処理部３への外気の拡散をより防止でき、これに
より雰囲気ガスの消費量を低減できる。例えば、メッシ
ュベルト２３ａの幅を４００ｍｍ、熱処理部３に導入可
能な被処理材Ｗの有効高さを２５０ｍｍとした場合、パ
ージ部４、６を設置しない場合は５０〜６０ｍ3 ／ｈの
雰囲気ガスが消費されるのに対して、各パージ部４、６
においてガスパージを行った場合、その消費量を２１ｍ
3 ／ｈに低減でき、真空パージを行った場合、その消費
量を１６ｍ3 ／ｈに低減できた。また、各搬送機構２
１、２２、２３、２４、２５間で被処理材Ｗを搬送速度
を同期した状態で受渡すので、被処理材Ｗを円滑に搬送
できる。また、被処理材Ｗを第１搬送機構２１から第２
搬送機構２２に高速回転駆動されるローラーを介して受
渡し、次に低速回転駆動されるローラーを介して第３搬
送機構２３に受渡し、次に第３搬送機構２３から第４搬
送機構２４に低速回転駆動されるローラーを介して受渡
し、次に高速回転駆動されるローラーを介して第５搬送
機構２５に受渡すことができる。これにより、各搬送機
構間での被処理材Ｗの受渡しを円滑に行うことができる
だけでなく、複数の被処理材Ｗの熱処理を行う場合に、
前方の被処理材Ｗを第２搬送機構２２から第３搬送機構
２３に受渡すと同時に、後方の被処理材Ｗを第１搬送機
構２１から第２搬送機構２２に受渡し、また、前方の被
処理材Ｗを第４搬送機構２４から第５搬送機構２５に受
渡すと同時に、後方の被処理材Ｗを第３搬送機構２３か
ら第４搬送機構２４に受渡すことが可能になり、搬送効
率を向上できる。According to the above configuration, when the workpiece W is introduced into the introduction-side purge section 4, the connection port between the introduction-side purge section 4 and the heat treatment section 3 is closed. Spreading is prevented. When the inside of the introduction side purge section 4 into which the material to be treated W is introduced is subjected to gas purging or vacuum purging, the inlet of the introduction side purge section 4 and the connection port with the heat treatment section 3 are closed. Of the outside air is prevented. After the gas purge or the vacuum purge, the material to be treated W is introduced into the heat treatment section 3 from the connection port between the introduction side purge section 4 and the heat treatment section 3, so that the diffusion of outside air into the heat treatment section 3 is prevented. The fluctuation of the oxygen concentration in 3 is prevented.
Before discharging the workpiece W to the discharge-side purge unit 6,
When the inside of the discharge side purge section 6 is subjected to gas purge or vacuum purge, the outlet of the discharge side purge section 6 and the connection port with the heat treatment section 3 are closed, so that the diffusion of outside air to the heat treatment section 3 is prevented. After the gas purge or the vacuum purge, the workpiece W is discharged into the discharge-side purge unit 6 from the connection port between the discharge-side purge unit 6 and the heat-treating unit 3, so that the outside air is prevented from diffusing into the heat-treating unit 3. Oxygen concentration fluctuation in the heat treatment unit 3 is prevented. When the material to be treated W is discharged from the discharge-side purge section 6 to the outside, the connection port between the discharge-side purge section 6 and the heat treatment section 3 is closed, so that diffusion of outside air to the heat treatment section 3 is prevented. The transport speed of the workpiece W in the introduction-side purge unit 4 and the discharge-side purge unit 6 is set to be higher than the transport speed in the heat treatment area in the heat treatment unit 3. Since the transport speed of W is reduced before reaching the heat treatment region and increased after passing through the heat treatment region, the material W is introduced into the heat treatment unit 3 from the introduction side purge unit 4 and discharged from the heat treatment unit 3. At the time of discharge to the side purge section 6, the transfer speed is made higher than that in the heat treatment area, and the diffusion of the outside air to the heat treatment section 3 can be further prevented, whereby the consumption of the atmosphere gas can be reduced. For example, when the width of the mesh belt 23a is 400 mm, the effective height of the workpiece W that can be introduced into the heat treatment unit 3 is 250 mm, and when the purge units 4 and 6 are not provided, the atmosphere gas is 50 to 60 m 3 / h. Is consumed, while the purge units 4 and 6
When the gas purge was performed in
3 / h, and when vacuum purging was performed, the consumption was reduced to 16 m 3 / h. Each transport mechanism 2
Since the workpiece W is transferred between 1, 22, 23, 24, and 25 in a state where the transport speed is synchronized, the workpiece W can be transported smoothly. Further, the workpiece W is transferred from the first transport mechanism 21 to the second
Transfer to the transport mechanism 22 via a roller driven at a high speed, then deliver to a third transport mechanism 23 via a roller driven at a low speed, and then rotate from the third transport mechanism 23 to a fourth transport mechanism 24 at a low speed. It can be delivered via a driven roller and then delivered to the fifth transport mechanism 25 via a roller driven at high speed. Thereby, not only can the delivery of the workpiece W between the transport mechanisms be performed smoothly, but also when performing the heat treatment of a plurality of workpieces W,
At the same time as the front workpiece W is delivered from the second transport mechanism 22 to the third transport mechanism 23, the rear workpiece W is delivered from the first transport mechanism 21 to the second transport mechanism 22. At the same time as transferring the processing material W from the fourth transport mechanism 24 to the fifth transport mechanism 25, it is possible to transfer the material to be processed W from the third transport mechanism 23 to the fourth transport mechanism 24, thereby improving the transport efficiency. Can be improved.
【００２６】なお、本発明は上記実施形態に限定されな
い。例えば、熱処理部やパージ部等の形態は特に限定さ
れない。また、第２、第４搬送機構のローラーコンベヤ
として高速回転駆動されるローラと低速回転駆動される
ローラとを有するものを示したが、同一ローラの駆動速
度を高速と低速との間で切り換えるようにしてもよい。
また、上記実施形態においては第１、第５搬送機構の種
類としてチェーンコンベヤを示し、第２、第４搬送機構
としてローラーコンベヤを示したが、各搬送機構の種類
はこれに限定されるものではない。さらに、上記実施形
態においては第１搬送機構と第５搬送機構とを共にチェ
ーンコンベヤとしたが互いに異なる種類の搬送機構とし
てもよく、第２搬送機構と第４搬送機構とを共にローラ
ーコンベヤとしたが互いに異なる種類の搬送機構として
もよい。The present invention is not limited to the above embodiment. For example, the form of the heat treatment section or the purge section is not particularly limited. In addition, although the roller conveyors of the second and fourth transport mechanisms have a roller driven at a high speed and a roller driven at a low speed, the driving speed of the same roller is switched between a high speed and a low speed. It may be.
In the above embodiment, a chain conveyor is shown as the first and fifth transport mechanisms, and a roller conveyor is shown as the second and fourth transport mechanisms. However, the types of each transport mechanism are not limited to this. Absent. Furthermore, in the above embodiment, the first and fifth transport mechanisms are both chain conveyors, but may be different types of transport mechanisms. Both the second transport mechanism and the fourth transport mechanism may be roller conveyors. May be different types of transport mechanisms.
【００２７】[0027]
【発明の効果】本発明によれば、被処理材の品質を悪化
させることなく、被処理材の大きさに影響されることな
く、雰囲気ガス消費量を低減でき、熱効率とスループッ
トを向上でき、しかも被処理材を効率良く円滑に搬送で
きる連続熱処理方法および熱処理炉を提供できる。According to the present invention, the consumption of the atmosphere gas can be reduced, the thermal efficiency and the throughput can be improved without deteriorating the quality of the material to be treated and without being affected by the size of the material to be treated. Moreover, it is possible to provide a continuous heat treatment method and a heat treatment furnace capable of efficiently and smoothly transporting the material to be treated.
【図１】本発明の実施形態の連続熱処理炉の導入側の側
断面図FIG. 1 is a sectional side view of an introduction side of a continuous heat treatment furnace according to an embodiment of the present invention.
【図２】本発明の実施形態の連続熱処理炉の排出側の側
断面図FIG. 2 is a sectional side view of the discharge side of the continuous heat treatment furnace according to the embodiment of the present invention.
３ 熱処理部 ４ 導入側パージ部 ６ 排出側パージ部 １５、１６、１７、１８ 扉 ２１ 第１搬送機構 ２２ 第２搬送機構 ２３ 第３搬送機構 ２４ 第４搬送機構 ２５ 第５搬送機構 Reference Signs List 3 heat treatment section 4 introduction side purge section 6 discharge side purge section 15, 16, 17, 18 door 21 first transport mechanism 22 second transport mechanism 23 third transport mechanism 24 fourth transport mechanism 25 fifth transport mechanism
Claims (5)
を、雰囲気ガスが導入される熱処理部を経て排出側パー
ジ部から排出するまで、連続的に搬送しつつ熱処理する
方法であって、 被処理材を導入側パージ部内に導入し、 その被処理材が導入された導入側パージ部内を、その導
入側パージ部の入口と熱処理部との接続口とを閉鎖した
状態で、ガスパージまたは真空パージし、 次に、その導入側パージ部と熱処理部との接続口を開い
て熱処理部内に被処理材を導入し、 その熱処理部内に導入された被処理材を搬送しつつ熱処
理し、 その熱処理部から排出側パージ部に被処理材を排出する
前に、その排出側パージ部内を、その排出側パージ部の
出口と熱処理部との接続口とを閉鎖した状態で、ガスパ
ージまたは真空パージし、 次に、その熱処理部と排出側パージ部との接続口を開い
て排出側パージ部内に被処理材を排出し、 次に、その被処理材を排出側パージ部から排出するに際
して、 被処理材の導入側パージ部内と排出側パージ部内での搬
送速度を、熱処理部内の熱処理領域における搬送速度よ
りも高速とし、 その熱処理部内において、被処理材の搬送速度を熱処理
領域に至る前に減速すると共に熱処理領域を過ぎた後に
増速する連続熱処理方法。1. A method of performing a heat treatment while continuously transporting a material to be treated introduced into an introduction-side purge section through a heat treatment section into which an atmospheric gas is introduced and discharging it from a discharge-side purge section. The material to be treated is introduced into the introduction-side purge section, and the inside of the introduction-side purge section into which the material to be treated has been introduced is purged with a gas purge or vacuum while closing the inlet of the introduction-side purge section and the connection port with the heat treatment section. Next, the connection between the introduction side purge section and the heat treatment section is opened, and the material to be treated is introduced into the heat treatment section. The material introduced into the heat treatment section is subjected to heat treatment while being conveyed. Before discharging the material to be processed to the discharge-side purge section from the section, the inside of the discharge-side purge section, with the outlet of the discharge-side purge section and the connection port with the heat treatment section closed, gas purge or vacuum purge, Next, the heat treatment Opening the connection port between the discharge section and the discharge side purge section to discharge the material to be processed into the discharge side purge section, and then discharging the material to be processed from the discharge side purge section, the inside of the introduction side purge section of the material to be processed is discharged. The transfer speed in the purge section on the discharge side is set higher than the transfer speed in the heat treatment area in the heat treatment section, and in the heat treatment section, the transfer speed of the material to be treated is reduced before reaching the heat treatment area and the heat treatment area is passed. A continuous heat treatment method that increases speed later.
理部との接続口、その熱処理部と排出側パージ部との接
続口、および排出側パージ部の出口の開閉手段と、 その導入側パージ部内を、ガスパージまたは真空パージ
する手段と、 その排出側パージ部内を、ガスパージまたは真空パージ
する手段と、 その導入側パージ部内において被処理材を搬送する第１
搬送機構と、 その熱処理部内の導入側において前記第１搬送機構から
受渡された被処理材を搬送する第２搬送機構と、 その熱処理部内の導入側と排出側との間の熱処理領域に
おいて前記第２搬送機構から受渡された被処理材を搬送
する第３搬送機構と、 その熱処理部内の排出側において前記第３搬送機構から
受渡された被処理材を搬送する第４搬送機構と、 その排出側パージ部内において前記第４搬送機構から受
渡された被処理材を搬送する第５搬送機構とを備え、 前記第１、第５搬送機構の搬送速度は前記第３搬送機構
の搬送速度よりも高速とされ、 前記第２搬送機構の搬送速度は、前記第１搬送機構から
被処理材を受渡される時は前記第３搬送機構に被処理材
を受渡す時よりも高速とされ、 前記第４搬送機構の搬送速度は、前記第３搬送機構から
被処理材を受渡される時は前記第５搬送機構に被処理材
を受渡す時よりも低速とされることを特徴とする連続熱
処理炉。2. A heat treatment section to which an atmosphere gas is introduced, an introduction purge section connected to the heat treatment section, a discharge purge section connected to the heat treatment section, an inlet of the introduction side purge section, A connection port between the introduction-side purge section and the heat-treatment section, a connection port between the heat-treatment section and the discharge-side purge section, and an opening / closing means for an outlet of the discharge-side purge section, and a means for purging the inside of the introduction-side purge section with a gas purge or vacuum. Means for purging the inside of the discharge-side purge section with a gas purge or vacuum, and a first means for transporting the material to be processed in the introduction-side purge section.
A transport mechanism, a second transport mechanism for transporting the workpiece transferred from the first transport mechanism on the introduction side in the heat treatment unit, and a second transport mechanism in the heat treatment area between the introduction side and the discharge side in the heat treatment unit. A third transport mechanism for transporting the workpiece transferred from the second transport mechanism, a fourth transport mechanism for transporting the workpiece delivered from the third transport mechanism at a discharge side in the heat treatment unit, and a discharge side thereof And a fifth transport mechanism for transporting the workpiece transferred from the fourth transport mechanism in the purge section, wherein the transport speeds of the first and fifth transport mechanisms are higher than the transport speed of the third transport mechanism. The transport speed of the second transport mechanism is higher when the workpiece is delivered from the first transport mechanism than when the workpiece is delivered to the third transport mechanism. The transport speed of the mechanism is the third A continuous heat treatment furnace, wherein the speed of the material to be processed is transferred at a lower speed when the material to be processed is delivered from the transport mechanism than when the material to be processed is delivered to the fifth transport mechanism.
構への受渡し時に、その第２搬送機構の搬送速度は第１
搬送機構の搬送速度に同期され、 被処理材の第２搬送機構から第３搬送機構への受渡し時
に、その第２搬送機構の搬送速度は第３搬送機構の搬送
速度に同期され、 被処理材の第３搬送機構から第４搬送機構への受渡し時
に、その第４搬送機構の搬送速度は第３搬送機構の搬送
速度に同期され、 被処理材の第４搬送機構から第５搬送機構への受渡し時
に、その第４搬送機構の搬送速度は第５搬送機構の搬送
速度に同期される請求項２に記載の連続熱処理炉。3. When the material to be processed is transferred from the first transport mechanism to the second transport mechanism, the transport speed of the second transport mechanism is equal to the first speed.
When the workpiece is transferred from the second transport mechanism to the third transport mechanism, the transport speed of the second transport mechanism is synchronized with the transport speed of the third transport mechanism, and is synchronized with the transport speed of the transport mechanism. At the time of delivery from the third transport mechanism to the fourth transport mechanism, the transport speed of the fourth transport mechanism is synchronized with the transport speed of the third transport mechanism, and the material to be processed is transferred from the fourth transport mechanism to the fifth transport mechanism. 3. The continuous heat treatment furnace according to claim 2, wherein the transfer speed of the fourth transfer mechanism is synchronized with the transfer speed of the fifth transfer mechanism at the time of delivery.
駆動される無端体により被処理材を搬送するコンベヤに
より構成され、 前記第２、第４搬送機構は、搬送方向の間隔をおいて並
列する複数のローラーにより被処理材を搬送するコンベ
ヤにより構成され、 その第２搬送機構における複数のローラーは、低速回転
駆動されるものと高速回転駆動されるものとを有し、そ
の低速回転駆動されるローラーは高速回転駆動されるロ
ーラーよりも第３搬送機構寄りに配置され、 その第４搬送機構における複数のローラーは、低速回転
駆動されるものと高速回転駆動されるものとを有し、そ
の低速回転駆動されるローラーは高速回転駆動されるロ
ーラーよりも第３搬送機構寄りに配置される請求項２ま
たは３に記載の連続熱処理炉。4. The first, third, and fifth transport mechanisms are configured by a conveyor that transports a material to be processed by an endless body that is driven to rotate, and the second and fourth transport mechanisms are spaced apart in a transport direction. A plurality of rollers in the second transport mechanism have a low-speed rotational drive and a high-speed rotational drive, and the second transport mechanism has a plurality of rollers that transport the material to be processed by a plurality of parallel rollers. The roller driven at a low speed is disposed closer to the third transport mechanism than the roller driven at a high speed. The plurality of rollers in the fourth transport mechanism are divided into a roller driven at a low speed and a roller driven at a high speed. 4. The continuous heat treatment furnace according to claim 2, wherein the roller driven at a low speed is disposed closer to the third transport mechanism than the roller driven at a high speed. 5.
ベヤにより構成され、第３搬送機構はメッシュベルトコ
ンベヤにより構成される請求項４に記載の連続熱処理
炉。5. The continuous heat treatment furnace according to claim 4, wherein the first and fifth transport mechanisms are constituted by a chain conveyor, and the third transport mechanism is constituted by a mesh belt conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10327486A JP2000146448A (en) | 1998-11-02 | 1998-11-02 | Continuous heat treatment method, and heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10327486A JP2000146448A (en) | 1998-11-02 | 1998-11-02 | Continuous heat treatment method, and heat treatment furnace |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005036458A Division JP4293994B2 (en) | 2005-02-14 | 2005-02-14 | Continuous heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000146448A true JP2000146448A (en) | 2000-05-26 |
Family
ID=18199702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10327486A Pending JP2000146448A (en) | 1998-11-02 | 1998-11-02 | Continuous heat treatment method, and heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000146448A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013057107A (en) * | 2011-09-09 | 2013-03-28 | Dowa Thermotech Kk | Heat treatment method and heat treatment apparatus |
| JP2014224666A (en) * | 2013-05-17 | 2014-12-04 | 光洋サーモシステム株式会社 | Continuous heat treatment device |
| JP2017129359A (en) * | 2017-03-24 | 2017-07-27 | 光洋サーモシステム株式会社 | Continuous heat treatment device |
| CN113091455A (en) * | 2021-04-21 | 2021-07-09 | 广西七色珠光材料股份有限公司 | Automatic discharging system and discharging method for roller kiln saggar |
-
1998
- 1998-11-02 JP JP10327486A patent/JP2000146448A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013057107A (en) * | 2011-09-09 | 2013-03-28 | Dowa Thermotech Kk | Heat treatment method and heat treatment apparatus |
| JP2014224666A (en) * | 2013-05-17 | 2014-12-04 | 光洋サーモシステム株式会社 | Continuous heat treatment device |
| JP2017129359A (en) * | 2017-03-24 | 2017-07-27 | 光洋サーモシステム株式会社 | Continuous heat treatment device |
| CN113091455A (en) * | 2021-04-21 | 2021-07-09 | 广西七色珠光材料股份有限公司 | Automatic discharging system and discharging method for roller kiln saggar |
| CN113091455B (en) * | 2021-04-21 | 2022-11-15 | 广西七色珠光材料股份有限公司 | Automatic discharging system and discharging method for roller kiln saggar |
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