JPH0520151B2 - - Google Patents
Info
- Publication number
- JPH0520151B2 JPH0520151B2 JP30709286A JP30709286A JPH0520151B2 JP H0520151 B2 JPH0520151 B2 JP H0520151B2 JP 30709286 A JP30709286 A JP 30709286A JP 30709286 A JP30709286 A JP 30709286A JP H0520151 B2 JPH0520151 B2 JP H0520151B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heating
- discharge
- coating fluid
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims description 47
- 239000011248 coating agent Substances 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 26
- 239000004831 Hot glue Substances 0.000 claims description 18
- 239000003973 paint Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 description 18
- 230000001070 adhesive effect Effects 0.000 description 18
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 230000007423 decrease Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、熱溶融接着剤、塗料等の塗付流体
を、塗付流体の圧送経路に設けた加熱器で加熱し
てノズルから被塗付物に向つて吐出するようにし
た塗付流体の加熱吐出装置に関し、特に、ノズル
から吐出される塗付流体の温度を予め設定した一
定温度に保つようにした吐出温度制御装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention heats a coating fluid such as a hot-melt adhesive or paint with a heater installed in a pressure-feeding path of the coating fluid and transfers the coating fluid from a nozzle to an object to be coated. The present invention relates to a heating and discharging device for a coating fluid that is discharged toward a nozzle, and particularly to a discharge temperature control device that maintains the temperature of a coating fluid discharged from a nozzle at a preset constant temperature.
従来の技術及び発明が解決しようとする問題点
熱溶融接着剤は、常温では固体となる熱可塑性
合成樹脂からなり、加熱して溶融した状態で被接
着物に直接に塗付し、その上に他の被接着物を圧
着したのち冷却して固化させることによつて接着
するようになつていて、この熱溶融接着剤を加熱
して塗付する部分の構造は、一般に、温度調節可
能な加熱器を内蔵した溶融タンクに貯留した熱溶
融接着剤をギアーポンプで汲み上げ、同じく加熱
器を内蔵した加熱ホースを介して、同じく加熱器
を内蔵した加熱ガンに圧送し、加熱ガンに接着し
たノズルから吐出して被接着物に塗付するように
なつている。Problems to be Solved by the Prior Art and the Invention Hot-melt adhesives are made of thermoplastic synthetic resins that are solid at room temperature. The adhesive is bonded by crimping the other object and then cooling and solidifying it, and the structure of the part where the hot-melt adhesive is applied by heating is generally a temperature-adjustable heating element. The hot-melt adhesive stored in a melting tank with a built-in heater is pumped up by a gear pump, and then sent under pressure to a heating gun, which also has a built-in heater, through a heated hose that also has a built-in heater, and then discharged from a nozzle attached to the heating gun. It is designed to be applied to the object to be adhered.
ところで、この熱溶融接着剤は、塗付時の粘度
によつて接着力の強さ並びに持続性が決まり、こ
の粘度は吐出温度と相関関係にあることから、接
着剤の種類によつて自ら最適な吐出温度が定めら
れるのであり、最適な吐出温度が得られるよう
に、溶融タンク、加熱ホース及び加熱ガンに内蔵
した各加熱器の加熱温度を調節しているのである
が、この各加熱器の加熱温度を一定にしておく
と、例えば、一日のうちの朝夕、あるいは、一年
のうちの冬場など、周りの温度が低いときには、
加熱ガンやノズルあるいは圧送経路の途中での放
熱量が増加することから、日中や夏場の周囲温度
が高いときに比べて、熱溶融接着剤の吐出温度が
下がり、熱溶融接着剤の粘度が高くなることによ
つて、吐出圧力及びノズルの口径や開口時間等が
同じ条件であると、熱溶融接着剤の吐出量すなわ
ち被接着物への塗付量が減少して接着不良を起こ
すおそれがあり、このため従来は、周囲温度が下
つたり上つたりするのに対応して、各加熱器の加
熱温度を上げたり下げたりして、熱溶融接着剤の
吐出温度を一定に保つようにしていたが、この加
熱器の温度調節は作業者の経験や勘に頼つて行な
われることから、吐出温度を一定にすることが困
難であり、熱溶融接着剤の塗付量が少な過ぎて接
着不良を招いたり、逆に多過ぎると被接着物の圧
着時にはみ出て被接着物が汚れる不具合があつ
た。 By the way, the strength and durability of the adhesive force of this hot-melt adhesive is determined by the viscosity at the time of application, and since this viscosity is correlated with the discharge temperature, it is possible to determine the optimum adhesive force depending on the type of adhesive. The heating temperature of each heater built into the melting tank, heating hose, and heating gun is adjusted to obtain the optimal discharge temperature. By keeping the heating temperature constant, for example, when the surrounding temperature is low, such as in the morning and evening of the day, or in the winter of the year,
Since the amount of heat dissipated from the heating gun, nozzle, or in the middle of the pressure feeding path increases, the discharge temperature of the hot melt adhesive decreases compared to when the ambient temperature is high during the day or summer, and the viscosity of the hot melt adhesive decreases. If the discharge pressure, nozzle diameter, opening time, etc. are the same, the discharge amount of the hot-melt adhesive, that is, the amount applied to the object to be adhered, may decrease, resulting in poor adhesion. Therefore, in the past, the heating temperature of each heater was raised or lowered in response to the drop or rise of the ambient temperature to keep the discharge temperature of the hot melt adhesive constant. However, since the temperature adjustment of this heater relies on the experience and intuition of the operator, it is difficult to keep the discharge temperature constant, and the amount of hot melt adhesive applied is too small, resulting in poor adhesion. This may lead to defects, or conversely, if there is too much, it will protrude and stain the adhered object when it is crimped.
また、引火による爆発を考慮する必要のない塗
料の塗装装置においても、塗料噴霧の微細化促進
のために、塗料圧送通路に加熱器を設けて塗料を
加熱する場合があり、この場合も、前記の熱溶融
接着剤の場合と同じように、周囲温度の変化の影
響を受けて塗料の吐出温度が変化し、粘度の変化
を伴つて吐出量が変動して塗膜が不均一となるお
それがあり、同じように、塗料の吐出温度を一定
に保つことのできる装置の出現が希求されてい
た。 In addition, even in paint coating equipment that does not require consideration of explosion due to ignition, a heater may be installed in the paint pressure passage to heat the paint in order to promote finer paint spray. As with hot-melt adhesives, the paint discharge temperature changes due to changes in ambient temperature, and the discharge rate fluctuates as the viscosity changes, potentially resulting in uneven coating. Similarly, there was a desire for a device that could maintain a constant paint discharge temperature.
問題点を解決するための手段
本発明の熱溶融接着剤、塗料等の塗付流体の加
熱吐出装置における吐出温度制御装置は、叙上の
点に鑑み完成されたものであつて、熱溶融接着
剤、塗料等の塗付流体を、該塗付流体の圧送経路
に設けた加熱器で加熱して、ノズルから被塗付物
に向つて吐出するようにした加熱吐出装置におい
て、塗付流体の吐出温度を設定する温度設定手段
と、前記ノズルから吐出された塗付流体の温度を
検知する検知手段と、前記温度設定手段の設定値
と前記検知手段の検知値の差に基づいて前記加熱
器の加熱温度を制御する制御手段とを備え、前記
塗付流体の吐出温度を前記設定温度に保つ構成と
した。Means for Solving the Problems The discharge temperature control device of the present invention in a heated discharge device for application fluid such as hot melt adhesive or paint has been completed in view of the above points. In a heating discharge device, a coating fluid such as a coating agent or paint is heated by a heater installed in a pressure feeding path of the coating fluid, and is discharged from a nozzle toward an object to be coated. a temperature setting means for setting a discharge temperature; a detection means for detecting the temperature of the coating fluid discharged from the nozzle; and a temperature setting means for detecting the temperature of the coating fluid discharged from the nozzle; and a control means for controlling the heating temperature of the coating fluid to maintain the discharge temperature of the coating fluid at the set temperature.
なお、本明細書において、塗付流体の圧送経路
とは、塗付流体の溶融タンク、加熱ホース及び加
熱ガンの全部または一部を指すものである。 Note that in this specification, the pumping route for the coating fluid refers to all or part of the melting tank, heating hose, and heating gun for the coating fluid.
発明の作用及び効果
本発明は上記構成になり、周囲温度が変化し
て、ノズルから吐出された塗付流体の吐出温度が
変化すると、これが検知手段によつて検知され、
この検知手段の検知値と、温度設定手段で予め設
定された塗付流体の最適の吐出温度の設定値とが
制御手段で比較され、その差に基づいて圧送経路
に設けた加熱器の加熱温度が制御されて、ノズル
から吐出される塗付流体の温度が設定温度に保た
れるのであつて、周囲温度が変化して塗付流体の
吐出温度が変化した場合に、その変化分に対応し
て加熱器の加熱温度が自動的に制御されて、ノズ
ルから吐出される塗付流体の吐出温度が常に一定
に保たれ、従つて、吐出時の塗付流体の粘度が一
定に保たれて、塗付流体を確実に一定量ずつ吐出
し得る効果がある。Functions and Effects of the Invention The present invention has the above configuration, and when the ambient temperature changes and the discharge temperature of the application fluid discharged from the nozzle changes, this is detected by the detection means,
The control means compares the detection value of this detection means with the setting value of the optimum discharge temperature of the coating fluid set in advance by the temperature setting means, and based on the difference, the heating temperature of the heater provided in the pressure feeding route is determined. is controlled to maintain the temperature of the coating fluid discharged from the nozzle at the set temperature, and when the ambient temperature changes and the discharge temperature of the coating fluid changes, the temperature is adjusted accordingly. The heating temperature of the heater is automatically controlled so that the discharge temperature of the coating fluid discharged from the nozzle is always kept constant, and therefore the viscosity of the coating fluid at the time of discharge is kept constant. This has the effect of reliably discharging a constant amount of application fluid.
実施例
以下、本発明を熱溶融接着剤の加熱吐出装置に
適用した一実施例を第１図に基づいて説明する。Embodiment Hereinafter, an embodiment in which the present invention is applied to a hot-melt adhesive heating discharge device will be described based on FIG. 1.
図のシステムにおいて、溶融タンク１内に溶融
状態で貯留された熱溶融接着剤ａは、ギアーポン
プ２で汲み上げられて、加熱ホース３を介して加
熱ガン４の吐出通路５に圧送され、吐出通路５に
介設した開閉弁６を一定時間間隔をおいて一定時
間ずつ開放するごとにノズル７から吐出され、吐
出された接着剤ａが、ノズル７の下方をコンベア
８に載せられて間欠的に搬送される被接着物ｂの
上面に塗付されるようになつている。 In the system shown in the figure, hot-melt adhesive a stored in a molten state in a melting tank 1 is pumped up by a gear pump 2 and is force-fed through a heating hose 3 to a discharge passage 5 of a heating gun 4. The adhesive a is discharged from the nozzle 7 every time the on-off valve 6 installed in the holder is opened for a fixed period of time at fixed time intervals, and the discharged adhesive a is placed on a conveyor 8 below the nozzle 7 and conveyed intermittently. The adhesive is applied to the upper surface of the object b to be adhered.
前記した溶融タンク１、加熱ホース３及び加熱
ガン４には、加熱用のヒータ１０と温度計測用の
熱電対１１とが一組ずつ各別に埋設され、夫々が
接続線１２，１３によつて、詳しくは後記する温
度制御器１５に接続されているとともに、ノズル
７の近傍に、ノズル７から吐出される接着剤ａの
温度を検知する非接触形赤外線放射温度計からな
る温度センサ１７が配設され、接続線１８で温度
制御器１５に接続されており、また、この温度制
御器１５に、使用する接着剤ａに最適な吐出温度
を入力する温度設定装置２０が接続されている。 A heater 10 for heating and a thermocouple 11 for temperature measurement are embedded in each of the melting tank 1, heating hose 3, and heating gun 4 described above, and are connected by connecting wires 12 and 13, respectively. A temperature sensor 17 consisting of a non-contact infrared radiation thermometer is connected to a temperature controller 15, which will be described in detail later, and is disposed near the nozzle 7 to detect the temperature of the adhesive a discharged from the nozzle 7. The temperature controller 15 is connected to a temperature controller 15 by a connecting line 18, and a temperature setting device 20 is connected to the temperature controller 15 for inputting the optimum discharge temperature for the adhesive a used.
前記の温度制御器１５は、熱電対１１で温度を
フイードバツクしつつヒータ１０への通電及び遮
電を繰り返して、溶融タンク１、加熱ホース３及
び加熱ガン４を各別に定められた温度に加熱し得
るようになつており、接着剤ａの吐出前は、温度
設定装置２０からの設定温度に基づいて、その設
定温度を得るために必要な溶融タンク１、加熱ホ
ース３及び加熱ガン４の温度を各別に決定し、
夫々をその決定された温度に加熱する機能を持つ
ているとともに、接着剤ａの吐出時には、前記の
設定温度と、温度センサ１７で検知される実際に
ノズル７から吐出された接着剤ａの温度を比較
し、この検知温度と設定温度の差から、熱電対１
１によつて検知される現在の溶融タンク１、加熱
ホース３及び加熱ガン４の温度から何度に上げ下
げすれば、実際の吐出温度が設定温度に一致する
かを演算し、溶融タンク１、加熱ホース３及び加
熱ガン４をその演算された温度に維持するよう
に、各ヒータ１０の通電及び遮電を制御する機能
を持つている。 The temperature controller 15 repeatedly turns on and off the heater 10 while feeding back the temperature with the thermocouple 11, heating the melting tank 1, heating hose 3, and heating gun 4 to individually determined temperatures. Before discharging the adhesive a, the temperatures of the melting tank 1, heating hose 3, and heating gun 4 necessary to obtain the set temperature are determined based on the set temperature from the temperature setting device 20. Decided separately for each
It has a function of heating each to the determined temperature, and when discharging the adhesive a, the set temperature and the temperature of the adhesive a actually discharged from the nozzle 7 detected by the temperature sensor 17 are used. From the difference between the detected temperature and the set temperature, thermocouple 1
The temperature of the melting tank 1, heating hose 3, and heating gun 4 detected by It has a function of controlling energization and interruption of each heater 10 so as to maintain the hose 3 and heating gun 4 at the calculated temperature.
次に、本実施例の作動を説明する。 Next, the operation of this embodiment will be explained.
まず、使用する熱溶融接着剤ａの最適の吐出温
度を温度設定装置２０から入力すると、温度制御
器１５により、その吐出温度を得るのに必要な溶
融タンク１、加熱ホース３及び加熱ガン４の加熱
温度が決定されて、夫々がその温度に維持され、
ノズル７から設定温度と同じ吐出温度で接着剤ａ
が吐出される。 First, when the optimum discharge temperature of the hot-melt adhesive a to be used is inputted from the temperature setting device 20, the temperature controller 15 controls the melting tank 1, heating hose 3, and heating gun 4 necessary to obtain the discharge temperature. a heating temperature is determined and each is maintained at that temperature;
Adhesive a is discharged from nozzle 7 at the same temperature as the set temperature.
is discharged.
そして、周囲温度が下がることによりノズル７
から吐出される接着剤ａの温度が下がると、その
吐出温度が温度センサ１７で検知され、温度制御
器１５により、検知温度と設定温度の差に基づい
て、吐出温度を設定温度に一致させるために必要
な溶融タンク１、加熱ホース３及び加熱ガン４の
新たな温度が演算されて、溶融タンク１、加熱ホ
ース３及び加熱ガン４がその温度に高められて維
持され、吐出温度が設定温度まで高められ、周囲
温度がさらに下つて再び吐出温度が低下すると、
溶融タンク１、加熱ホース３及び加熱ガン４の温
度がさらに所定の温度にまで高められて、接着剤
ａの吐出温度が常に設定温度に維持される。 As the ambient temperature decreases, the nozzle 7
When the temperature of the adhesive a discharged from the adhesive falls, the temperature sensor 17 detects the discharge temperature, and the temperature controller 15 adjusts the discharge temperature to the set temperature based on the difference between the detected temperature and the set temperature. The new temperatures of the melting tank 1, heating hose 3, and heating gun 4 necessary for When the ambient temperature drops further and the discharge temperature drops again,
The temperatures of the melting tank 1, heating hose 3, and heating gun 4 are further increased to a predetermined temperature, and the discharge temperature of the adhesive a is always maintained at the set temperature.
逆に、接着剤ａの吐出温度が設定温度よりも高
くなると、溶融タンク１、加熱ホース３及び加熱
ガン４の温度が所定温度まで下げられ、接着剤ａ
の吐出温度が設定温度まで下げられる。 Conversely, when the discharge temperature of adhesive a becomes higher than the set temperature, the temperatures of the melting tank 1, heating hose 3, and heating gun 4 are lowered to a predetermined temperature, and the temperature of the adhesive a becomes higher than the set temperature.
discharge temperature is lowered to the set temperature.
なお、本発明は、上記実施例の熱溶融接着剤の
加熱吐出装置に限らず、塗料圧送通路の途中に加
熱器を設けて、塗料を加熱して吐出するようにし
た塗料の加熱吐出装置にも適用することが可能で
ある。 Note that the present invention is not limited to the hot-melt adhesive heating dispensing device of the above embodiment, but also applies to a paint heating dispensing device in which a heater is provided in the middle of the paint pressure passage to heat and discharge the paint. can also be applied.
第１図は本発明の一実施例のシステムブロツク
図である。
１……溶融タンク、３……加熱ホース、４……
加熱ガン、７……ノズル、１０……ヒータ、１５
……温度制御器、１７……温度センサ、２０……
温度設定装置、ａ……熱溶融接着剤、ｂ……被接
着物。
FIG. 1 is a system block diagram of one embodiment of the present invention. 1... Melting tank, 3... Heating hose, 4...
heating gun, 7... nozzle, 10... heater, 15
... Temperature controller, 17 ... Temperature sensor, 20 ...
Temperature setting device, a... hot melt adhesive, b... object to be adhered.
Claims (1)
付流体ａの圧送経路１，３，４に設けた加熱器１
０で加熱して、ノズル７から被塗付物ｂに向かつ
て吐出するようにした加熱吐出装置において、塗
付流体ａの吐出温度を設定する温度設定手段２０
と、前記ノズル７から吐出された塗付流体ａの温
度を検知する検知手段１７と、前記温度設定手段
２０の設定値と前記検知手段１７の検知値の差に
基づいて前記加熱器１０の加熱温度を制御する制
御手段１５とを備え、前記塗付流体ａの吐出温度
を前記設定温度に保つ構成としたことを特徴とす
る吐出温度制御装置。1 A heater 1 provided with a coating fluid a such as a hot-melt adhesive or a paint in pressure feeding routes 1, 3, and 4 for the coating fluid a.
Temperature setting means 20 for setting the discharge temperature of coating fluid a in a heating discharge device configured to heat the coating fluid at 0 and discharge it from the nozzle 7 toward the object to be coated b.
, a detection means 17 for detecting the temperature of the coating fluid a discharged from the nozzle 7, and heating of the heater 10 based on the difference between the set value of the temperature setting means 20 and the detected value of the detection means 17. A discharge temperature control device comprising a control means 15 for controlling temperature, and configured to maintain the discharge temperature of the coating fluid a at the set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30709286A JPS63158158A (en) | 1986-12-23 | 1986-12-23 | Emitting temperature control apparatus in apparatus for heating and emitting coating fluid such as heat-meltable adhesive or paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30709286A JPS63158158A (en) | 1986-12-23 | 1986-12-23 | Emitting temperature control apparatus in apparatus for heating and emitting coating fluid such as heat-meltable adhesive or paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63158158A JPS63158158A (en) | 1988-07-01 |
| JPH0520151B2 true JPH0520151B2 (en) | 1993-03-18 |
Family
ID=17964928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30709286A Granted JPS63158158A (en) | 1986-12-23 | 1986-12-23 | Emitting temperature control apparatus in apparatus for heating and emitting coating fluid such as heat-meltable adhesive or paint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63158158A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001224988A (en) * | 2000-02-17 | 2001-08-21 | Nippon Paint Co Ltd | Hot air spray gun for water-based paint |
| KR100745807B1 (en) | 2006-02-02 | 2007-08-02 | 엘지전자 주식회사 | Viscosity maintaining device of spraying material and method |
| CN103639098A (en) * | 2013-11-29 | 2014-03-19 | 灵璧县明鑫木业有限公司 | Wood painting device |
-
1986
- 1986-12-23 JP JP30709286A patent/JPS63158158A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63158158A (en) | 1988-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |