JPH0459234A - Corrugator - Google Patents

Corrugator

Info

Publication number
JPH0459234A
JPH0459234A JP17055690A JP17055690A JPH0459234A JP H0459234 A JPH0459234 A JP H0459234A JP 17055690 A JP17055690 A JP 17055690A JP 17055690 A JP17055690 A JP 17055690A JP H0459234 A JPH0459234 A JP H0459234A
Authority
JP
Japan
Prior art keywords
heating
cardboard sheet
corrugated cardboard
moisture
width direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP17055690A
Other languages
Japanese (ja)
Other versions
JP2713645B2 (en
Inventor
Hiroaki Kuno
広明 久野
Hiroyuki Takenaka
竹中 裕幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2170556A priority Critical patent/JP2713645B2/en
Publication of JPH0459234A publication Critical patent/JPH0459234A/en
Application granted granted Critical
Publication of JP2713645B2 publication Critical patent/JP2713645B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

PURPOSE:To restrict a warp in the flow direction of a corrugated cardboard sheet and a warp in a width direction by detecting moisture with a corrugated cardboard sheet held at the after flow side of a heating part, calculating a warp value of the corrugated cardboard sheet, and controlling a heating plate. CONSTITUTION:A heating part 6 consists of a heating box 9 which heats a perfect corrugated cardboard sheet 3 uniformly in a width direction by evaporation and a single or a plurality of heating plates 20. Induction heating coils 21 are arranged close to the heating plate 20. In addition, sensors 23, 23' for measurement of moisture in an upper liner and a lower line are provided above and below the perfect corrugated cardboard sheet 3. The warp value of a corrugated cardboard sheet is calculated based on an output signal from the moisture sensors 23, 23'. Finally an output from a high frequency induction heating coil 21 is controlled by connection of an output signal from a calculator 24 which calculates the heating value of the lower liner to minimize the warp value.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は段ボールシートを製造するコルゲータに関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a corrugator for manufacturing corrugated cardboard sheets.

(従来の技術) 第5図は従来のコルゲータの一部を示し、前工程の図示
しないシングルフェーサで作られた片面段ボールシート
1は、その波状8紙の段頂にグルーマシン14によって
澱粉糊13が塗布され、ダブルフェーサ5に入る。ここ
で片面段ボールシート1は、裏ライナ紙1′と波状8紙
1″が接着されているシートである。
(Prior Art) FIG. 5 shows a part of a conventional corrugator, in which a single-sided corrugated cardboard sheet 1 made by a single facer (not shown) in the previous process is coated with starch glue by a glue machine 14 on the corrugated top of eight corrugated papers. 13 is applied and enters the double facer 5. Here, the single-sided corrugated cardboard sheet 1 is a sheet in which a back liner paper 1' and a corrugated 8-sheet paper 1'' are adhered.

一方表ライナ2はプレヒータ4で予熱され、同様にダブ
ルフェーサ5へ入る。ダブルフェーサ5に入った片面段
ボールシート1とライナ2は、ヒーティングパート6に
おいてはロール12で駆動されるベルト8とヒーティン
グボックス9間で挟持され、更にベルト8の裏面側に列
設したウェイトロール10で加圧されて移送される。
On the other hand, the front liner 2 is preheated by the preheater 4 and similarly enters the double facer 5. In the heating part 6, the single-sided corrugated sheet 1 and liner 2 that have entered the double facer 5 are held between a belt 8 driven by a roll 12 and a heating box 9, and a weight roll arranged in a row on the back side of the belt 8. 10 and transferred under pressure.

そして片面段ボールシート1と表ライナ2は、このヒー
ティングパート6を通過する際、内部に高温の蒸気を有
するヒーティングボックス9の加熱により、付着した澱
粉糊が糊化し、片面段ボールシート1の波状8紙1″の
段頂と表ライす2が接着されて、両面段ボールシート3
となる。この両面段ボールシート3は続くクーリングパ
ート7で前記ベルト8と下方ベルト11間を前記ウェイ
トワール10により加圧されながら搬送されて次工程へ
と送られる。
When the single-sided corrugated sheet 1 and the front liner 2 pass through this heating part 6, the adhering starch paste is gelatinized by the heating of the heating box 9, which has high-temperature steam inside, and the single-sided corrugated sheet 1 becomes wavy. The corrugated top of 8 sheets of paper 1" and the front layer 2 are glued together to form double-sided corrugated cardboard sheet 3.
becomes. In the subsequent cooling part 7, this double-sided corrugated paperboard sheet 3 is conveyed between the belt 8 and the lower belt 11 while being pressurized by the weight swirl 10 and sent to the next process.

次工程では図示しない装置により罫線入れ、切断等の加
工が施され、その後最終工程では平滑な断片状となって
段ボールとして積上げられ排出される。
In the next process, a device (not shown) performs processing such as adding lines and cutting, and then in the final process, the pieces are turned into smooth fragments, stacked as cardboard boxes, and discharged.

(発明が解決しようとする課題) 両面段ボールシート3は以上の過程で製造されるが、従
来のコルゲータでは次のような問題を有していた。即ち
、前記の製造過程で分かるように、段ボールシートでは
接着までの過程で水分の吸収、放出が複雑に繰り返され
ている。
(Problems to be Solved by the Invention) The double-sided corrugated cardboard sheet 3 is manufactured through the above process, but the conventional corrugator has the following problems. That is, as can be seen from the above-mentioned manufacturing process, corrugated cardboard sheets repeatedly absorb and release moisture in a complicated manner during the process up to adhesion.

これは糊付着、加温等による強制的な水分付与や乾燥に
よるものの他に、予熱乾燥時に放出される水分の再吸収
、或いは雰囲気中の水分吸収、放出等もある。段ボール
シートでは、ダブルフェーサの中で片面段ボールシート
1と表ライナ2が接着完了した時点での表裏ライナ2,
1′の水分含有状態によって、雰囲気中に排出されたシ
ートが反り変形を起こす。反り変形を起こすと段ボール
品質が得られないから、これが段ボール製造企業の重大
な関心事となっていた。
This is caused by adhesive adhesion, forced moisture addition by heating, etc., and drying, as well as reabsorption of moisture released during preheating and drying, or absorption and release of moisture in the atmosphere. In the case of a corrugated sheet, the front and back liners 2, 1, 2 and 3 when the single-sided corrugated sheet 1 and the front liner 2 have been bonded together in the double facer,
Due to the moisture content in step 1', the sheet discharged into the atmosphere is warped and deformed. This has become a serious concern for corrugated board manufacturing companies, since the quality of the corrugated board cannot be obtained if warpage occurs.

段ボールの反りは第6図に示すように、最も良好な平滑
状B (a)に対し、上反り(b)、下反り(C)とし
て現われる。反りとしては図示の如く幅方向に反る場合
以外にも紙流れ方向に変形する場合もある。しかし、−
船釣に紙は流れ方向よりも幅方向に変形が大きいため、
幅方向の反りが最も生じ易いし、問題視される。という
のは、紙の水分による伸縮率は幅方向1に対し流れ方向
にはX〜A程度であり非常に小さいからである。
As shown in FIG. 6, the warp of the cardboard appears as an upward warp (b) and a downward warp (C) in contrast to the best smooth state B (a). In addition to warping in the width direction as shown in the figure, warpage may also occur in the direction of paper flow. However, −
For boat fishing, paper deforms more in the width direction than in the flow direction, so
Curvature in the width direction is most likely to occur and is viewed as a problem. This is because the expansion and contraction ratio of paper due to moisture is very small, being about X to A in the machine direction compared to 1 in the width direction.

また第6図(ロ)のように変形するのは、接着までの過
程で表ライナ2側の水分が裏ライナ1′側の水分よりも
多い場合に生じ易く、第6図(C)の変形は逆に裏ライ
ナ1′側の水分が多い場合に生じ易い。このような反り
変形を防止するために従来のコルゲータでは、ダブルフ
ェーサに入る前の過程で、片面段ボールシート1或いは
表ライナ2に水分を付与する装置を備えているものもあ
る。しかし従来のコルゲータでは反り変形の検出手段が
備わっていないし、それに基づく制御手段もないため、
作業者が段ボールの反り変形を、排出された段ボール紙
片を検査して調べ、しかる後に水分付与装置を作動する
ようにしているのが実状である。
Also, the deformation shown in Figure 6 (B) tends to occur when the moisture on the front liner 2 side is higher than the moisture on the back liner 1' side during the process up to adhesion, and the deformation shown in Figure 6 (C) occurs easily. Conversely, this tends to occur when there is a lot of moisture on the back liner 1' side. In order to prevent such warping and deformation, some conventional corrugators are equipped with a device that adds moisture to the single-sided corrugated cardboard sheet 1 or the front liner 2 before entering the double facer. However, conventional corrugators are not equipped with a means to detect warpage deformation, nor are there any control means based on it.
In reality, an operator inspects the discharged corrugated cardboard pieces for warpage and deformation, and then operates the moisture applicator.

前述のような従来のコルゲータによると、反り変形の防
止が迅速に対応できない。また短ロフトの製造シートで
は防止調整が間に合わぬことがある。従って不良シート
の生産をある程度余儀なくされ、また熟練作業者の配置
が必要になる等の問題があった。
According to the conventional corrugator as described above, it is not possible to quickly prevent warping and deformation. In addition, if the seat is manufactured with a short loft, the prevention adjustment may not be made in time. Therefore, there are problems such as being forced to produce defective sheets to some extent and requiring the allocation of skilled workers.

本発明は段ボールシートの幅方向の反り量に対応して、
誘導加熱コイルの出力を制御することにより、前記従来
の課題を解決し得るコルゲータを提供せんとするもので
ある。
The present invention corresponds to the amount of warpage in the width direction of the corrugated board sheet,
The present invention aims to provide a corrugator that can solve the above-mentioned conventional problems by controlling the output of the induction heating coil.

(課題を解決するための手段) このため本発明は、片面段ボールシートとライナ紙を接
着して両面段ボールシートを製造する装置において、同
装置のヒーティングパートに、段ボールシートを幅方向
に一様に加熱するヒーティングボックスと、幅方向に複
数個に分割され独立して制御可能なヒーティングプレー
トを設けると共に、前記ヒーティングパートの後流側に
、段ボールシートを挟んで水分検出装置と、同検出装置
の信号により段ボールシートの反り量を演算する装置と
、同演算装置の信号により前記ヒーティングプレートを
制御する装置を設けてなるもので、これを課題解決のた
めの手段とするものである。
(Means for Solving the Problem) Therefore, the present invention provides an apparatus for producing a double-sided corrugated sheet by bonding a single-sided corrugated sheet and a liner paper. A heating box that heats the area, a heating plate that is divided into a plurality of parts in the width direction and can be controlled independently, and a moisture detection device and a moisture detection device are installed on the downstream side of the heating part with a cardboard sheet in between. This device is equipped with a device that calculates the amount of warpage of a corrugated board sheet based on a signal from a detection device, and a device that controls the heating plate based on a signal from the same calculation device, and is used as a means to solve the problem. .

(作用) ヒーティングプレートの温度を任意に変えることにより
、段ボールシートとヒーティングプレート間の伝熱量が
制御できる。即ち、ヒーティングプレートの温度を上げ
て伝熱量を増加させると、段ボールシートの温度は上昇
し、裏ライナの水分が減少することに着目し、本発明で
は裏ライナ側の水分を変えることによって表ライナと裏
ライナの水分バランスをとることで、段ボールシートの
反り量を制御するものである。
(Function) By arbitrarily changing the temperature of the heating plate, the amount of heat transfer between the corrugated cardboard sheet and the heating plate can be controlled. That is, by raising the temperature of the heating plate and increasing the amount of heat transfer, the temperature of the corrugated board sheet increases and the moisture content of the back liner decreases. By controlling the moisture balance between the liner and back liner, the amount of warpage of the corrugated cardboard sheet is controlled.

従来の蒸気加熱のヒーティングボックスでは、幅方向に
温度を迅速にコントロールすることが難しい。そのため
本発明では幅方向に一様に加熱するヒーティングボック
スと幅方向に加熱量を制御できる高周波誘導コイルを適
当なピッチで配設したヒーティングプレートを組合せ、
幅方向に任意に段ボールシートへの伝熱量を制御する。
With conventional steam-heating heating boxes, it is difficult to quickly control the temperature in the width direction. Therefore, in the present invention, a heating box that heats uniformly in the width direction and a heating plate in which high-frequency induction coils that can control the amount of heating in the width direction are arranged at an appropriate pitch are combined.
The amount of heat transferred to the corrugated sheet can be arbitrarily controlled in the width direction.

(実施例) 以下本発明を図面の実施例について説明すると、第1図
〜第4図は本発明の実施例を示し、1は片面段ボールシ
ート、1′は裏ライナ紙、1″は波状8祇、2はライナ
、3は両面段ボールシート、4はプレヒータ、5はダブ
ルフェーサ、6はヒーティングパート、7はクーリング
パート、8はベルト、9はヒーティングボックス、10
はウェイトロール、11は下方ベルト、12はロール、
13は澱粉糊、14はグルーマシンでこれらは前記第5
図の従来と同一である。
(Embodiment) The present invention will be described below with reference to the embodiments of the drawings. Figures 1 to 4 show embodiments of the present invention, where 1 is a single-sided corrugated cardboard sheet, 1' is a back liner paper, and 1'' is a corrugated 8 2 is a liner, 3 is a double-sided corrugated sheet, 4 is a preheater, 5 is a double facer, 6 is a heating part, 7 is a cooling part, 8 is a belt, 9 is a heating box, 10
is the weight roll, 11 is the lower belt, 12 is the roll,
13 is starch glue, 14 is a glue machine, and these are the
This is the same as the conventional one shown in the figure.

さてヒーティングパート6は、両面段ボールシート3を
幅方向−様に蒸気で加熱するヒーティングボックス9と
、1乃至複数のヒーティングプレート20から構成され
、ヒーティングプレート20は幅方向に任意の加熱が出
来るよう、複数の誘導加熱コイル21がヒーティングプ
レート20に接近して配設されている。第2図はその具
体的な設置例を示し、第4図は他の実施例で、ベルト8
の上からコイルを設置した例を示す。
Now, the heating part 6 is composed of a heating box 9 that heats the double-sided corrugated cardboard sheet 3 with steam in the width direction, and one or more heating plates 20. A plurality of induction heating coils 21 are arranged close to the heating plate 20 so that the heating plate 20 can be heated. Figure 2 shows a specific installation example, and Figure 4 shows another example of the belt 8.
An example is shown in which the coil is installed from above.

またダブルフェーサ5のクーリングパート7出側の両面
段ボールシート3の上下には、上ライナ及び下ライナの
水分を測定するセンサ23゜23′が設けられており、
同センサ23.23’は、例えば赤外線水分計などが適
用でき、表ライナ、裏ライナの表面水分の測定が可能で
ある。なお、前記センサ23,23’は、幅方向に複数
個設けても良いし、幅方向にトラバースできるような支
持梁に固定して、上下の幅方向水分を測定してもよい。
Furthermore, sensors 23° and 23' are provided above and below the double-sided corrugated cardboard sheet 3 on the exit side of the cooling part 7 of the double facer 5 to measure the moisture content of the upper and lower liners.
The sensors 23 and 23' can be, for example, an infrared moisture meter, and can measure the surface moisture of the front liner and back liner. Note that a plurality of the sensors 23, 23' may be provided in the width direction, or may be fixed to a support beam that can be traversed in the width direction to measure the moisture content in the upper and lower width directions.

また水分センサ23,23’の出力信号をうけて、水分
の上下ライナの水分差εによって生しる段ボールシート
の反り量を演算し、その反り量を最小にすべく下ライナ
の加熱量を算出する演算器24、同演算器24からの出
力信号をうけて高周波誘導加熱コイル21の出力を制御
し、コイルを作動させるインバータ制御ユニット22が
設けられている。高周波誘導加熱コイル21は、コイル
に交番電流を流すことにより、被加熱体(ヒーティング
プレート20)表面に渦電流を発生させ、この渦電流の
損失により発熱することはよく知られていることである
。コイルによる加熱量の制御は、デユーティ比制御(O
N−OFFの比率を微細時間間隔で変化させることによ
って必要パワーを得る)などで容易に行なうことができ
る。
In addition, in response to the output signals of the moisture sensors 23 and 23', the amount of warping of the corrugated cardboard sheet caused by the moisture difference ε between the upper and lower liners is calculated, and the amount of heating of the lower liner is calculated to minimize the amount of warping. An inverter control unit 22 is provided, which controls the output of the high-frequency induction heating coil 21 in response to an output signal from the calculator 24, and operates the coil. It is well known that the high-frequency induction heating coil 21 generates eddy current on the surface of the heated object (heating plate 20) by passing an alternating current through the coil, and generates heat due to the loss of this eddy current. be. The amount of heating by the coil is controlled by duty ratio control (O
The required power can be easily obtained by changing the N-OFF ratio at minute time intervals.

おな、第1図ではヒーティングボックス9を前半に、ヒ
ーティングプレート20を後半に配設しているが、その
順序や負荷割合は第1図に限定するものではなく、前半
にヒーティングプレート、後半にヒーティングボックス
を配設しても良い。
In Fig. 1, the heating box 9 is arranged in the first half and the heating plate 20 is arranged in the latter half, but the order and load ratio are not limited to those shown in Fig. 1. , a heating box may be installed in the second half.

(発明の効果) 以上詳細に説明した如く本発明は構成されているので、
オンラインで段ボールシートの反り量が予測できると共
に、段ボールシートの流れ方向の反り、幅方向の反りの
何れについても抑制することが出来る。従って生産性が
著しく向上し、段ボールシートの損紙を最小限にするこ
とが可能である。
(Effects of the Invention) Since the present invention is configured as explained in detail above,
The amount of warpage of a corrugated board sheet can be predicted online, and both warpage in the machine direction and warp in the width direction of the corrugated board sheet can be suppressed. Therefore, productivity is significantly improved and it is possible to minimize paper waste of corrugated cardboard sheets.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例に係るコルゲータの回路図を含
む側断面図、第2図は本発明のヒーティングプレートと
誘導加熱コイルの配設例の1つを示す断面図、第3図は
第2図のA〜A断面図、第4図は第3図と異なるヒーテ
ィングプレートと誘導加熱コイルの配設例を示す断面図
、第5図は従来のダブルフェーサの側断面図、第6図は
段ボールシートの反りの状態を示す説明図である。 図の主要部分の説明 1−片面段ボールシート 2・−ライナ 3−両面段ボールシート 5・−ダブルフェーサ 6−・−ヒーティングバート 7−クーリングバート 9・−ヒーティングボックス 20−  ヒーティングプレート 21−高周波誘導加熱コイル 22− インバータ制御装置 23・−水分センサ 晃2図 第3図 M4図 第5回
FIG. 1 is a side cross-sectional view including a circuit diagram of a corrugator according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing one example of arrangement of a heating plate and induction heating coil of the present invention, and FIG. Fig. 2 is a sectional view from A to A in Fig. 2, Fig. 4 is a sectional view showing an example of the arrangement of the heating plate and induction heating coil that is different from Fig. 3, Fig. 5 is a side sectional view of a conventional double facer, and Fig. 6 is It is an explanatory view showing the state of warpage of a corrugated cardboard sheet. Explanation of main parts of the diagram 1 - Single-sided corrugated sheet 2 - Liner 3 - Double-sided corrugated sheet 5 - Double facer 6 - Heating bar 7 - Cooling bar 9 - Heating box 20 - Heating plate 21 - High frequency induction Heating coil 22 - Inverter control device 23 - Moisture sensor Ko 2 Figure 3 Figure M4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] 片面段ボールシートとライナ紙を接着して両面段ボール
シートを製造する装置において、同装置のヒーティング
パートに、段ボールシートを幅方向に一様に加熱するヒ
ーティングボックスと、幅方向に複数個に分割され独立
して制御可能なヒーティングプレートを設けると共に、
前記ヒーティングパートの後流側に、段ボールシートを
挟んで水分検出装置と、同検出装置の信号により段ボー
ルシートの反り量を演算する装置と、同演算装置の信号
により前記ヒーティングプレートを制御する装置を設け
たことを特徴とするコルゲータ。
In a device that produces double-sided corrugated sheets by bonding single-sided corrugated sheets and liner paper, the heating part of the device includes a heating box that heats the corrugated sheets uniformly in the width direction, and a heating box that is divided into multiple pieces in the width direction. In addition to providing an independently controllable heating plate,
On the downstream side of the heating part, there is a moisture detection device with the cardboard sheet in between, a device that calculates the amount of warpage of the cardboard sheet based on the signal from the detection device, and a device that controls the heating plate based on the signal from the calculation device. A corrugator characterized by being equipped with a device.
JP2170556A 1990-06-28 1990-06-28 Corrugator Expired - Fee Related JP2713645B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2170556A JP2713645B2 (en) 1990-06-28 1990-06-28 Corrugator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2170556A JP2713645B2 (en) 1990-06-28 1990-06-28 Corrugator

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JPH0459234A true JPH0459234A (en) 1992-02-26
JP2713645B2 JP2713645B2 (en) 1998-02-16

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JP2170556A Expired - Fee Related JP2713645B2 (en) 1990-06-28 1990-06-28 Corrugator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7424901B2 (en) 2002-02-05 2008-09-16 Mitsubishi Heavy Industries, Ltd. System for fabricating corrugated board

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523147A (en) * 1978-08-09 1980-02-19 Hitachi Ltd Lubricant for plastic working
JPS6268735A (en) * 1985-09-24 1987-03-28 三菱重工業株式会社 Double facer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5523147A (en) * 1978-08-09 1980-02-19 Hitachi Ltd Lubricant for plastic working
JPS6268735A (en) * 1985-09-24 1987-03-28 三菱重工業株式会社 Double facer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7699084B2 (en) 2002-01-23 2010-04-20 Mitsubishi Heavy Industries Ltd. System for fabricating corrugated board
US7424901B2 (en) 2002-02-05 2008-09-16 Mitsubishi Heavy Industries, Ltd. System for fabricating corrugated board
US7669629B2 (en) 2002-02-05 2010-03-02 Mitsubishi Heavy Industries Ltd. System for fabricating corrugated board

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