JPH1135014A - Temperature controlling method of packaging material fusing heater, and its device - Google Patents
Temperature controlling method of packaging material fusing heater, and its deviceInfo
- Publication number
- JPH1135014A JPH1135014A JP9207114A JP20711497A JPH1135014A JP H1135014 A JPH1135014 A JP H1135014A JP 9207114 A JP9207114 A JP 9207114A JP 20711497 A JP20711497 A JP 20711497A JP H1135014 A JPH1135014 A JP H1135014A
- Authority
- JP
- Japan
- Prior art keywords
- heater wire
- value
- current
- voltage
- controller
- 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.)
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Links
Landscapes
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Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、被包装物を収容し
た熱可塑性包装材料の開口部を、シールバーに沿って設
けたヒータ線にインパルス高圧電流を印加して溶着する
ようにした装置において、前記包装材料に加える温度を
一定に制御する方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for welding an opening of a thermoplastic packaging material containing an object to be packaged by applying an impulse high-voltage current to a heater wire provided along a seal bar. And a method and apparatus for controlling the temperature applied to the packaging material to a constant value.
【０００２】[0002]
【従来の技術】金属製ヒートバーに沿って設けたヒータ
線に、インパルス電流を一定の時間間隔で繰り返し印加
し、該ヒータ線の発熱によって熱可塑性の包材を次々と
溶着するシール装置では、前記ヒートバーの温度を常に
センサーで検出し、当該検出温度に基づき電源回路のス
イッチを開閉してヒートバーの温度管理をしたとして
も、温度の上限と下限との間には一定の幅があり、した
がって温度むら大きいという欠点がある。そこで前記ヒ
ートバーにカートリッジヒータを埋め込み、該カートリ
ッジヒータで前記ヒータの基礎温度を比較的高温に保ち
ながら、さらにその上にインパルス電流を印加するとい
うヒート装置（実開昭６１−９１８８４または特開昭６
１−３０１５）が提供された。2. Description of the Related Art In a sealing device in which an impulse current is repeatedly applied at regular time intervals to a heater wire provided along a metal heat bar, and a thermoplastic packaging material is successively welded by the heat generated by the heater wire, Even if the temperature of the heat bar is always detected by the sensor and the temperature of the heat bar is controlled by opening and closing the switch of the power supply circuit based on the detected temperature, there is a certain width between the upper and lower temperature limits. There is a disadvantage that it is uneven. Accordingly, a cartridge heater is buried in the heat bar, and while the base temperature of the heater is kept relatively high by the cartridge heater, an impulse current is further applied thereon (Japanese Utility Model Application Laid-Open No. 61-91884 or Japanese Unexamined Patent Application Publication No.
1-3015).
【０００３】[0003]
【発明が解決しょうとする課題】この新しい装置では、
ヒートバーの基礎温度を比較的高温で保ちながら、その
上に調整電流を印加するから、確かに大きな温度むらの
発生はなくなる。しかし、複数個のヒータを円軌道に沿
って回転させ、これら各ヒータで順次溶着を行うロータ
リ式のシール装置では、個々のヒータ線の加工むら或は
材質むら又は痩せむらによって各ヒータ線にわずかな固
有の電気抵抗の差があり、この差は使用年月が重なるに
連れて次第に大きくなる傾向がある。それにもまして一
般に物流業者は包装コストを下げるために、できれば廉
価な包材を使用したいと考えているし、この種包材は材
質のいい包材に比べると当然溶着許容幅が小さいから、
ヒータ線のわずかな温度むらが包材の溶着許容幅に対し
て熱量の過不足なり、均一な溶着を期待できない事が起
こる。With this new device,
Since the adjustment current is applied to the heat bar while maintaining the base temperature of the heat bar at a relatively high temperature, large temperature unevenness does not occur. However, in a rotary seal device in which a plurality of heaters are rotated along a circular orbit and these heaters are sequentially welded, slight unevenness in the processing or material or thinness of each heater wire causes a slight increase in each heater wire. There is an inherent difference in electrical resistance, and this difference tends to gradually increase as the years of use overlap. In general, logistics companies generally want to use inexpensive packaging materials in order to reduce packaging costs, and since this type of packaging material naturally has a smaller allowable welding width than good-quality packaging materials,
The slight unevenness in the temperature of the heater wire causes an excess or deficiency in the amount of heat with respect to the allowable width of welding of the packaging material, so that uniform welding cannot be expected.
【０００４】[0004]
【課題を解決するための手段】本発明は、個々のヒータ
線での発熱量をよりシビアに設定するために、１の方法
では、検温センサーからのフイードバック信号に基づい
て加熱素子の発熱温度をコントロールし且つ該検温セン
サー及び該加熱素子を備え持つシールバーの基礎温度を
常に一定に保持させた上で、該シールバーに設けたヒー
タ線に高圧電流を一定時間印加し、該ヒータ線に圧着す
る包材を一定の時間間隔で溶着するようにしたシール装
置において、前記の高圧電流印加直前に、前記ヒータ線
の電源回路に前記高圧電流値よりも値の小さい試験電流
を流して同ヒータ線の固有抵抗値を検出し、この検出抵
抗値を制御器に入力して基準データ値との誤差数値を算
出し、この算出誤差数値に基づいて前記ヒータ線の発熱
温度が常に一定化するように、該ヒータ線に印加する高
圧電流の電力量を設定するようにした。According to the present invention, in order to more severely set the amount of heat generated by each heater wire, in one method, the heat generation temperature of the heating element is determined based on a feedback signal from a temperature sensor. After controlling and keeping the base temperature of the seal bar having the temperature sensor and the heating element constant, a high-voltage current is applied to the heater wire provided on the seal bar for a certain period of time to press the heater wire. In a sealing device in which a packaging material to be welded is welded at a constant time interval, a test current having a value smaller than the high-voltage current value is supplied to a power supply circuit of the heater wire immediately before the high-voltage current is applied. The detected resistance value is input to the controller to calculate an error value with respect to the reference data value. Based on the calculated error value, the heating temperature of the heater wire is always constant. So that the, and to set the amount of power high-voltage current to be applied to the heater wire.
【０００５】また２の装置では、検温センサーからのフ
イードバック信号に基づいて加熱素子の発熱温度をコン
トロールし且つ該検温センサー及び該加熱素子を備え持
つシールバーの基礎温度を常に一定に保持させた上で、
該シールバーに設けたヒータ線に高圧電流を一定時間印
加し、該ヒータ線に圧着する包材を一定の時間間隔で溶
着するようにしたシール装置において、前記ヒータ線と
直列の電源回路に介設した電圧変換器と、制御器から前
記電圧変換器に一次的指示信号を送り、該電圧変換器を
通して前記ヒータ線に前記一次的指示信号に対応する試
験電流を流す手段と、前記試験電流の通過に応じて前記
電源回路での電流値及び電圧値をそれぞれ検出する電
流、電圧両検出器と、前記電流、電圧両検出器から制御
器に入力されるデータを参考にして、該制御器が記憶す
る基準データと前記ヒータ線の固有抵抗値との誤差数値
を算出する手段と、前記の算出誤差数値に基づいて調整
した二次的指示信号を制御器から前記電圧変換器に送
り、該電圧変換器を通過する高圧電流を前記二次的指示
信号の大きさに対応する電力量に設定する手段とにより
構成する。In the second device, the temperature of the heating element is controlled based on a feedback signal from the temperature sensor, and the base temperature of the seal bar having the temperature sensor and the heating element is always kept constant. so,
In a sealing device in which a high-voltage current is applied to a heater wire provided on the seal bar for a fixed time and a packaging material to be pressed against the heater wire is welded at a fixed time interval, a sealing circuit is connected to a power supply circuit in series with the heater wire. A voltage converter provided, means for sending a primary instruction signal from the controller to the voltage converter, and flowing a test current corresponding to the primary instruction signal to the heater wire through the voltage converter; and The current and voltage detectors for detecting the current value and the voltage value in the power supply circuit in response to the passage, respectively, and the controller refers to data input to the controller from the current and voltage detectors. Means for calculating an error value between the reference data to be stored and the specific resistance value of the heater wire, and sending a secondary instruction signal adjusted based on the calculated error value from the controller to the voltage converter, Through the converter The high-voltage current to be constituted by means for setting the amount of power corresponding to the magnitude of the secondary instruction signal.
【０００６】[0006]
【作用】ヒータ線への高圧電流を印加する直前に、該ヒ
ータ線の電源回路に、前記の高圧電流値よりも値の小さ
い試験電流を流して同ヒータ線の固有抵抗値を検出し、
この検出抵抗値を制御器に入力して基準データ値との誤
差数値を算出し、この算出誤差数値に基づいて前記ヒー
タ線の発熱温度が常に一定化するように、該ヒータ線に
印加する高圧電流の電力量を設定するもので、ヒータ線
への電力供給の都度、前もって同ヒータ線の消耗、また
は材質変化からくる抵抗値の変化をみて、それに見合っ
た電力供給を行うので必然的にヒータ線での発熱温度が
安定する。しかも前記ヒータ線を支持するシールバーは
加熱素子でもって基礎温度が一定に保持されているの
で、ヒータ線を通して包材に作用する熱量は高精度で均
一化し、特に、ロータリー式の複数のシールバー相対間
の温度誤差を改善する点では格別な効果がある。Immediately before applying a high-voltage current to a heater wire, a test current having a value smaller than the high-voltage current value is applied to a power supply circuit of the heater wire to detect a specific resistance value of the heater wire,
The detected resistance value is input to the controller to calculate an error value with respect to the reference data value, and a high voltage applied to the heater wire is set based on the calculated error value so that the heating temperature of the heater wire is always constant. Set the amount of current power.Each time power is supplied to the heater wire, the heater wire is used in advance to check the consumption of the heater wire or the change in resistance due to the change in material, and the power is supplied in accordance with the change. The heat generation temperature at the wire stabilizes. Moreover, since the base temperature of the seal bar supporting the heater wire is kept constant by the heating element, the amount of heat acting on the packaging material through the heater wire is made uniform with high precision. There is a special effect in improving the relative temperature error.
【０００７】[0007]
【実施例】図１に示すようにヒータ線１０は、トランス
１１及びダイオードブリッジ１２を介して電源１３と接
続し、直流の電源回路１４とは直列接続である。また前
記電源回路に設けたパワートランジスターからなる電圧
変換器１５を制御器１６と出力回路１７を介して接続す
る一方、同電源回路の電流検出器１８及び、ヒータ線１
０と並列の電圧検出器１９とを、それぞれ入力回路２０
ａ，２０ｂを介して制御器１６と接続している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a heater wire 10 is connected to a power supply 13 via a transformer 11 and a diode bridge 12, and is connected in series to a DC power supply circuit 14. A voltage converter 15 composed of a power transistor provided in the power supply circuit is connected to a controller 16 via an output circuit 17, and a current detector 18 and a heater wire 1 of the power supply circuit are connected to the voltage converter 15.
0 and the voltage detector 19 in parallel with the input circuit 20 respectively.
a and 20b are connected to the controller 16.
【０００８】図２に示すごとく、前記のヒータ線１０は
金属製のシールバー２１に沿って設置されるが、該シー
ルバー２１に設けたセンサー２２は加熱素子２３からシ
ールバーに伝えられる熱量値を回路２４を介して制御器
１６にフイードバックし、該制御器からパワーコントロ
ーラ２５への指示信号２６で、熱源２７から加熱素子２
３に送られるエネルギーを調整してシールバー２１の基
礎温度を常に一定にコントロールする。As shown in FIG. 2, the heater wire 10 is installed along a metal seal bar 21. A sensor 22 provided on the seal bar 21 has a heat value transmitted from the heating element 23 to the seal bar. Is fed back to the controller 16 via the circuit 24, and the control signal from the controller to the power controller 25 is supplied from the heat source 27 to the heating element 2.
By adjusting the energy sent to 3, the base temperature of the seal bar 21 is always controlled to be constant.
【０００９】図２のごとくテーブル２８のシール台２９
に被包装物３０を収容した包材３１の開口部が置かれる
と、シールバー２１がアクチュエータあるいはカムのよ
うな機械的動力によって下動して前記開口部をヒータ線
１１が圧接し、コントローラ３２によって調整された高
圧電流がヒータ線１０にイスンパルスされて開口部を溶
着する。この場合、包材３１の溶着最適値を摂氏１８０
度に仮定すると、加熱素子２３はシールバー２１を摂氏
１００度に保温し、コントローラ３２はヒータ線１０が
摂氏８０度に昇温するのに適した電力を送るもので、こ
のコントローラ３２の詳細をすでに述べた図１に示して
いる。なお図２では、シールバー２１が上下に動くよう
に示したが、包材３１を吊り下げて支持し、シールバー
２１が水平方向に動く装置として適用できる。[0009] As shown in FIG.
When the opening of the packaging material 31 accommodating the article to be packaged 30 is placed, the seal bar 21 is moved down by mechanical power such as an actuator or a cam so that the opening is pressed by the heater wire 11 and the controller 32 is pressed. The high-voltage current adjusted by the above is pulsed into the heater wire 10 to weld the opening. In this case, the optimal welding value of the packaging material 31 is set to 180 degrees Celsius.
Assuming that the heating element 23 keeps the temperature of the seal bar 21 at 100 degrees Celsius, the controller 32 sends electric power suitable for heating the heater wire 10 to 80 degrees Celsius. This is shown in FIG. 1 already described. In FIG. 2, the seal bar 21 is shown to move up and down. However, the present invention can be applied as a device that suspends and supports the packaging material 31 and moves the seal bar 21 in the horizontal direction.
【００１０】図１において制御器１６から回路１７を介
して電圧変換器１５に微小な指示信号１を送ると、この
指示信号の電流値に対応した電力の試験電流が電源回路
１４においてヒータ線１０に送られ、該ヒータ線１０の
抵抗に則した電流値が電流検出器１８から制御器１６に
フイードバック２され、一方ヒータ線１０の抵抗に則し
た電圧は電圧検出器１９から制御器１６にフイードバッ
ク３される。そしてこれらフイードバック信号から制御
器１６はヒータ線１０の固有抵抗値を算出して制御器に
組み込まれた演算手段で持って基準データ値と前記の算
出抵抗値との誤差数値が引き出され、この誤差数値を参
考に組み入れた指示信号４を電圧変換器１５に送信する
ので、該電圧変換器１５を通して送られる電力量は前記
誤差数値を補正してヒータ線１０での発熱量を常に均一
化する。In FIG. 1, when a small instruction signal 1 is sent from a controller 16 to a voltage converter 15 via a circuit 17, a test current of electric power corresponding to the current value of the instruction signal is supplied to a heater line 10 in a power supply circuit 14. The current value corresponding to the resistance of the heater wire 10 is fed back 2 from the current detector 18 to the controller 16, while the voltage corresponding to the resistance of the heater wire 10 is fed back from the voltage detector 19 to the controller 16. 3 is done. The controller 16 calculates the specific resistance value of the heater wire 10 from these feedback signals, and obtains an error value between the reference data value and the calculated resistance value by using the calculating means incorporated in the controller. Since the instruction signal 4 incorporated with reference to the numerical value is transmitted to the voltage converter 15, the amount of electric power transmitted through the voltage converter 15 corrects the error numerical value and always makes the amount of heat generated in the heater wire 10 uniform.
【００１１】図１は直流の電源回路を実施例としたが、
同電源回路を交流形式に変更しても作用上変更はなく、
図３のフローチャートもかわらない。すなわち、指示電
流Ｓ１によって電源回路に試験電流Ｓ２を流し、その電
流値Ｓ３と電圧値Ｓ４とからヒータ線の抵抗値を算出Ｓ
５した後、基本データＳ６と前記算出抵抗値Ｓ５とから
電力値Ｓ７を設定し、この設定電力値に見合った高圧電
流を前記ヒータ線に印加Ｓ８することを示し、図１の回
路２０ａを介してアラーム処理Ｓ９を行う。FIG. 1 shows a DC power supply circuit as an embodiment.
Even if the power supply circuit is changed to AC type, there is no change in operation,
The flowchart of FIG. 3 does not change. That is, the test current S2 is supplied to the power supply circuit by the instruction current S1, and the resistance value of the heater wire is calculated from the current value S3 and the voltage value S4.
After that, a power value S7 is set from the basic data S6 and the calculated resistance value S5, and a high voltage current corresponding to the set power value is applied to the heater wire S8. To perform alarm processing S9.
【図１】 電気回路図FIG. 1 Electric circuit diagram
【図２】 シール装置の側面図FIG. 2 is a side view of a sealing device.
【図３】 フローチャートFIG. 3 is a flowchart.
１０…‥ヒータ線 １４…‥電源回路 １５…‥電圧変
換器 １６…‥制御器 １８…‥電流検出器 １９…‥
電圧検出器 ２１…‥シールバー ２２…‥センサー
２３…‥加熱素子 ３２…‥コントローラ10: heater wire 14: power supply circuit 15: voltage converter 16: controller 18: current detector 19:
Voltage detector 21… ‥ Seal bar 22… ‥ Sensor
23… ‥ Heating element 32… ‥ Controller
Claims (2)
基づいて加熱素子の発熱温度をコントロールし且つ該検
温センサー及び該加熱素子を備え持つシールバーの基礎
温度を常に一定に保持させた上で、該シールバーに設け
たヒータ線に高圧電流を一定時間印加し、該ヒータ線に
圧着する包材を一定の時間間隔で溶着するようにしたシ
ール装置において、 前記の高圧電流印加直前に、前記ヒータ線の電源回路に
前記高圧電流値よりも値の小さい試験電流を流して同ヒ
ータ線の固有抵抗値を検出し、この検出抵抗値を制御器
に入力して基準データ値との誤差数値を算出し、この算
出誤差数値に基づいて前記ヒータ線の発熱温度が常に一
定化するように、該ヒータ線に印加する高圧電流の電力
量を設定するようにした包材溶着ヒータの温度制御方
法。1. The method according to claim 1, wherein the temperature of the heating element is controlled based on a feedback signal from a temperature sensor, and the base temperature of a seal bar having the temperature sensor and the heating element is always kept constant. In a sealing device in which a high-voltage current is applied to a heater wire provided on a bar for a certain period of time and a packaging material to be crimped to the heater wire is welded at certain time intervals, immediately before the high-voltage current is applied, A test current having a value smaller than the high voltage current value is supplied to the power supply circuit to detect a specific resistance value of the same heater wire, and the detected resistance value is input to a controller to calculate an error value with respect to a reference data value. A method for controlling the temperature of the packaging material welding heater, wherein the power amount of the high-voltage current applied to the heater wire is set so that the heat generation temperature of the heater wire is always constant based on the calculated error value. Law.
基づいて加熱素子の発熱温度をコントロールし且つ該検
温センサー及び該加熱素子を備え持つシールバーの基礎
温度を常に一定に保持させた上で、該シールバーに設け
たヒータ線に高圧電流を一定時間印加し、該ヒータ線に
圧着する包材を一定の時間間隔で溶着するようにしたシ
ール装置において、 前記ヒータ線と直列の電源回路に介設した電圧変換器
と、 制御器から前記電圧変換器に一次的指示信号を送り、該
電圧変換器を通して前記ヒータ線に前記一次的指示信号
に対応する試験電流を流す手段と、 前記試験電流の通過に応じて前記電源回路での電流値及
び電圧値をそれぞれ検出する電流、電圧両検出器と、 前記電流、電圧両検出器から制御器に入力されるデータ
を参考にして、該制御器が記憶する基準データと前記ヒ
ータ線の固有抵抗値との誤差数値を算出する手段と、 前記の算出誤差数値に基づいて調整した二次的指示信号
を制御器から前記電圧変換器に送り、該電圧変換器を通
過する高圧電流を前記二次的指示信号の大きさに対応す
る電力量に設定する手段とにより構成した包材溶着ヒー
タの温度制御装置。2. The method according to claim 1, wherein the temperature of the heating element is controlled based on a feedback signal from the temperature sensor and the base temperature of the seal bar having the temperature sensor and the heating element is always kept constant. In a sealing device in which a high-voltage current is applied to a heater wire provided on a bar for a certain period of time and a packaging material to be pressed against the heater wire is welded at a certain time interval, the sealing device is provided in a power supply circuit in series with the heater wire. A voltage converter, means for sending a primary instruction signal from the controller to the voltage converter, and flowing a test current corresponding to the primary instruction signal to the heater wire through the voltage converter; In response, a current and a voltage detector for respectively detecting a current value and a voltage value in the power supply circuit, and referring to data input to the controller from the current and the voltage detector, Means for calculating an error value between the reference data stored by the controller and the specific resistance value of the heater wire; and a secondary instruction signal adjusted based on the calculated error value from the controller to the voltage converter. Means for setting the high-voltage current passing through the voltage converter to an amount of power corresponding to the magnitude of the secondary instruction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9207114A JPH1135014A (en) | 1997-07-16 | 1997-07-16 | Temperature controlling method of packaging material fusing heater, and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9207114A JPH1135014A (en) | 1997-07-16 | 1997-07-16 | Temperature controlling method of packaging material fusing heater, and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1135014A true JPH1135014A (en) | 1999-02-09 |
Family
ID=16534434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9207114A Pending JPH1135014A (en) | 1997-07-16 | 1997-07-16 | Temperature controlling method of packaging material fusing heater, and its device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1135014A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004041643A3 (en) * | 2002-11-06 | 2004-07-08 | Cfs Germany Gmbh | Resistance heating |
| JP2008030758A (en) * | 2006-07-26 | 2008-02-14 | Best Pack Kk | Method for cutting vacuum packaging sealed body |
-
1997
- 1997-07-16 JP JP9207114A patent/JPH1135014A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004041643A3 (en) * | 2002-11-06 | 2004-07-08 | Cfs Germany Gmbh | Resistance heating |
| JP2008030758A (en) * | 2006-07-26 | 2008-02-14 | Best Pack Kk | Method for cutting vacuum packaging sealed body |
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