JP2012016639A - Device for measuring residual quantity of coating material in powder coating apparatus - Google Patents

Device for measuring residual quantity of coating material in powder coating apparatus Download PDF

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JP2012016639A
JP2012016639A JP2010153570A JP2010153570A JP2012016639A JP 2012016639 A JP2012016639 A JP 2012016639A JP 2010153570 A JP2010153570 A JP 2010153570A JP 2010153570 A JP2010153570 A JP 2010153570A JP 2012016639 A JP2012016639 A JP 2012016639A
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powder
powder coating
amount
paint
powder paint
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JP5665395B2 (en
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Shinya Okumura
真也 奥村
Nobufumi Sakurai
宣文 櫻井
Tatsuya Nishio
達哉 西尾
Yoshitaka Suzuki
善貴 鈴木
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Asahi Sunac Corp
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Asahi Sunac Corp
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Abstract

PROBLEM TO BE SOLVED: To measure the residual quantity of a powder coating material A in a powder coating tank 1 simply from the work time of a powder coating apparatus.SOLUTION: An electronic control device 13 for adjusting a flow throttling valve 10 of a main nozzle 7 and a flow throttling valve 11 of a sub air nozzle 8 includes a built-in program for measuring residual quantity. With the program, the work time of an injector 2 is integrated; the integrated amount of the use of a powder coating is calculated by multiplying the integrated work time by the discharge amount of a powder coating A per unit time; and the residual quantity in a powder coating tank 1 is measured by subtracting the integrated amount of the use of the powder coating from an initial amount supplied to the powder coating tank 1.

Description

この発明は、粉体塗料タンクから粉体塗料を吸引し、粉体塗装ガンに供給する粉体塗装装置における塗料残量計測装置に関するものである。   The present invention relates to a paint remaining amount measuring device in a powder coating apparatus that sucks powder paint from a powder paint tank and supplies it to a powder coating gun.

従来、粉体塗装装置は、粉体塗料タンクから粉体塗料を吸引し、吐出口から搬送ホースを介して、粉体塗装ガンに粉体塗料をエアー搬送するインジェクターを備えている。   2. Description of the Related Art Conventionally, a powder coating apparatus includes an injector that sucks powder paint from a powder paint tank and carries the powder paint to the powder coating gun by air from a discharge port via a transport hose.

インジェクターは、圧縮エアー源に流量絞り弁を介して接続されるメインエアーノズルを有し、このメインエアーノズルから供給されるメインエアーによってインジェクター本体内に負圧を生じさせ、この負圧によって粉体塗料タンクから粉体を吸引し、メインエアーと共に、吐出口から粉体塗料を吐出する装置である。   The injector has a main air nozzle connected to a compressed air source via a flow restrictor, and the main air supplied from the main air nozzle generates a negative pressure in the injector body. This is a device that sucks powder from a paint tank and discharges powder paint from a discharge port together with main air.

ところで、インジェクター本体から吐出された粉体塗料は、メインエアーによって搬送ホース内に搬送されるが、搬送ホース内に安定した搬送エアーを供給するために、インジェクターに、圧縮エアー源に流量絞り弁を介して接続されるサブエアーノズルを設けて、搬送ホース内に、メインエアーと共に、サブエアーを供給するようにしたものが一般的に用いられている（特許文献１、特許文献２）。   By the way, the powder coating material discharged from the injector body is transported into the transport hose by the main air. In order to supply stable transport air into the transport hose, a flow restrictor is provided in the injector and a compressed air source. In general, a sub air nozzle that is connected via the main air is supplied to the transport hose together with the main air (Patent Document 1 and Patent Document 2).

特開２００２−２７３２８２号公報JP 2002-273282 A 特開２００６−１０２７０８号公報JP 2006-102708 A

ところで、従来、粉体塗料タンクから粉体塗料を吸引し、粉体塗装ガンに供給する粉体塗装装置においては、粉体塗料タンク内の粉体塗料の残量が少なくなると、粉体塗料タンクに新粉を補充したり、粉体塗料タンクを新しいものに取り替えたりする必要がある。   By the way, in a conventional powder coating apparatus that sucks a powder paint from a powder paint tank and supplies it to a powder coating gun, when the remaining amount of the powder paint in the powder paint tank decreases, the powder paint tank It is necessary to refill new powder or replace the powder coating tank with a new one.

ところが、従来、粉体塗料タンク内の粉体塗料の残量を知るためには、粉体塗料タンクの重量を計測したり、粉体塗料タンク内の粉体塗料の高さをレベラーで計測したりする必要がある。   However, conventionally, in order to know the remaining amount of powder paint in the powder paint tank, the weight of the powder paint tank is measured, or the height of the powder paint in the powder paint tank is measured with a leveler. It is necessary to do.

このような方法で、残量を計測するには、装置コストが掛かったり、複雑な制御を行ったりする必要がある。   In order to measure the remaining amount by such a method, it is necessary to increase the apparatus cost or to perform complicated control.

そこで、この発明は、粉体塗装装置の稼働時間から簡単に、粉体塗料タンク内の粉体塗料の残量を計測しようとするものである。   Therefore, the present invention is intended to measure the remaining amount of the powder paint in the powder paint tank easily from the operation time of the powder coating apparatus.

前記の課題を解決するために、この発明は、圧縮エアー源に流量絞り弁を介して接続されるメインエアーノズルを有し、このメインエアーノズルから供給されるメインエアーによって粉体塗料タンクから粉体塗料を吸引し、吐出口から搬送ホースを介して粉体塗装ガンに粉体塗料のエアー搬送を行うインジェクターを備え、インジェクターにサブエアーを供給する、圧縮エアー源に流量絞り弁を介して接続されるサブエアーノズルを設け、メインエアーノズルの流量絞り弁と、サブエアーノズルの流量絞り弁を調節する電子制御装置を備え、上記電子制御装置に、インジェクターの稼働時間を積算し、その積算時間に、単位時間当たりの粉体塗料の吐出量を掛けあわせて計算した粉体塗料積算使用量を計算し、粉体塗料タンクの初期投入量から粉体塗料積算使用量を減算して粉体塗料タンクの残量を計測する残量計測プログラムを内蔵させたものである。   In order to solve the above-described problems, the present invention has a main air nozzle connected to a compressed air source via a flow restrictor, and the main air supplied from the main air nozzle causes a powder from the powder coating tank. It is equipped with an injector that sucks body paint from the discharge port and conveys the powder paint to the powder coating gun via the transfer hose, and supplies the sub-air to the injector and is connected to the compressed air source via the flow restrictor. The sub air nozzle is provided, and the flow control valve for the main air nozzle and the electronic control device for adjusting the flow control valve for the sub air nozzle are provided. The operating time of the injector is integrated into the electronic control device, and Calculate the cumulative amount of powder paint calculated by multiplying the discharge amount of powder paint per unit time, By subtracting the powder coating accumulated amount in which the remaining amount of the powder coating tank was built the remaining amount measuring program for measuring.

そして、粉体塗料タンクの残量が、予め入力した値を下回った場合に、警告表示あるいは粉体塗料の補充表示を行うようにする。   Then, when the remaining amount of the powder coating tank falls below a previously input value, a warning display or a powder coating replenishment display is performed.

この発明によれば、メインエアーノズルの流量絞り弁と、サブエアーノズルの流量絞り弁を調節する電子制御装置に、インジェクターの稼働時間と、インジェクターを稼働させた場合における単位時間当たりの粉体塗料の吐出量を予め実測して入力しておくだけで、粉体塗料タンクの残量計算が行える。   According to the present invention, the electronic control device for adjusting the flow throttle valve of the main air nozzle and the flow throttle valve of the sub air nozzle has the operating time of the injector and the powder coating material per unit time when the injector is operated. It is possible to calculate the remaining amount of the powder coating tank simply by actually measuring and inputting the discharge amount in advance.

したがって、特別な重量計やレベラーを使用することなく、粉体塗装装置の稼働時間から簡単に、粉体塗料タンク内の粉体塗料の残量を計測することができるので、装置コストの低減化が図れる。   Therefore, it is possible to measure the remaining amount of powder paint in the powder paint tank easily from the operating time of the powder coating equipment without using a special weighing scale or leveler. Can be planned.

この発明に係る粉体塗装装置の一実施形態を示す全体構成図である。1 is an overall configuration diagram showing an embodiment of a powder coating apparatus according to the present invention.

以下、この発明の実施の形態について説明する。
図１は、流動式の粉体塗料タンク１から粉体塗料Ａをインジェクター２によって吸引して、塗装ガン３に粉体塗料をエアー搬送して吐出する粉体塗装装置に使用する粉体搬送装置を示している。塗装ガン３としては、ガン先端にコロナ電極を備えたコロナ静電式塗装ガン、ガン本体内に摩擦チューブを備える摩擦帯電式静電塗装ガンがある。 Embodiments of the present invention will be described below.
FIG. 1 shows a powder conveying device used in a powder coating apparatus for sucking a powder coating A from a fluid type powder coating tank 1 by an injector 2 and air conveying and discharging the powder coating to a coating gun 3. Is shown. Examples of the coating gun 3 include a corona electrostatic coating gun having a corona electrode at the tip of the gun, and a friction charging electrostatic coating gun having a friction tube in the gun body.

粉体塗料タンク１は、下部が多孔質板４によって仕切られ、多孔質板４の下方から除湿除油されたコンプレサーエアー５が導入されている。多孔質板４から吐出される流動エアーにより、粉体塗料タンク１内の粉体塗料Ａは、除湿され流動状態になって分散している。   The lower part of the powder coating tank 1 is partitioned by the porous plate 4, and the compressor air 5 dehumidified and deoiled is introduced from below the porous plate 4. The powder coating A in the powder coating tank 1 is dehumidified by the flowing air discharged from the porous plate 4 and dispersed in a fluid state.

粉体塗料タンク１の上部には、粉体塗料タンク１内の粉体塗料Ａを吸引して、搬送ホース６を介して、粉体塗料Ａを塗装ガン３にエアー搬送するインジェクター２が設置されている。   In the upper part of the powder coating tank 1 is installed an injector 2 that sucks the powder coating A in the powder coating tank 1 and air-transports the powder coating A to the coating gun 3 via the transfer hose 6. ing.

インジェクター２には、メインエアーノズル７とサブエアーノズル８が設けられている。   The injector 2 is provided with a main air nozzle 7 and a sub air nozzle 8.

メインエアーノズル７とサブエアーノズル８には、圧縮エアーが供給されるコンプレッサー等の圧縮エアー源９にそれぞれ流量絞り弁１０、１１を介して接続されている。   The main air nozzle 7 and the sub air nozzle 8 are connected to a compressed air source 9 such as a compressor to which compressed air is supplied via flow restrictors 10 and 11, respectively.

圧縮エアー源９と流量絞り弁１０、１１との間には、減圧弁１５が設置されている。   A pressure reducing valve 15 is installed between the compressed air source 9 and the flow restrictors 10 and 11.

流量絞り弁１０、１１は、電子制御装置１３によって開度が自動調整される。   The opening degree of the flow restrictors 10 and 11 is automatically adjusted by the electronic control unit 13.

電子制御装置１３には、流量絞り弁１０、１１の開度と、メインエアーノズル７のメインエアー量に対応する粉体吸引量、サブエアーノズル８のサブエアー量の実測値との関係が予め指令値として入力されている。また、電子制御装置１３には、インジェクター２の稼働時間を積算する積算手段と、その積算時間に、単位時間当たりの粉体塗料Ａの吐出量を掛けあわせて計算した粉体塗料積算使用量を計算し、粉体塗料タンク１の初期投入量から粉体塗料積算使用量を減算して粉体塗料タンク１の残量を計測する残量計測手段を備えるプログラムを内蔵させている。   The electronic control unit 13 is instructed in advance with the relationship between the opening degree of the flow restrictors 10 and 11, the powder suction amount corresponding to the main air amount of the main air nozzle 7, and the actually measured value of the sub air amount of the sub air nozzle 8. It is entered as a value. Further, the electronic control unit 13 includes an integration means for integrating the operating time of the injector 2 and an accumulated usage amount of the powder paint calculated by multiplying the integration time by the discharge amount of the powder paint A per unit time. A program including a remaining amount measuring means for calculating and measuring the remaining amount of the powder coating tank 1 by subtracting the accumulated amount of the powder coating from the initial charging amount of the powder coating tank 1 is incorporated.

そして、粉体塗料タンク１の残量が、予め入力した値を下回った場合に、警告表示あるいは粉体塗料Ａの補充表示を行うようにしている。   When the remaining amount of the powder paint tank 1 falls below a value input in advance, a warning display or a replenishment display of the powder paint A is performed.

インジェクター２のメインエアーノズル７から供給される圧縮エアーは、メインエアーと呼ばれ、粉体塗料Ａをベンチュリーの原理で吸引口１２に負圧を与えて吸引管１６を経由して粉体塗料Ａを吸引して塗装ガン３に搬送を行なう作用を有する。一般に、このメインエアーのエアーの圧、量を多くすると、吸引口１２からのベンチュリー効果が増大し、吐出口１４からの吐出量が増え、塗装ガン３からの単位時間当たりの粉体量が多くなる。   The compressed air supplied from the main air nozzle 7 of the injector 2 is called main air. The powder paint A is given a negative pressure to the suction port 12 by the Venturi principle and the powder paint A is passed through the suction pipe 16. Has a function of sucking and transporting to the coating gun 3. Generally, when the pressure and amount of the main air are increased, the venturi effect from the suction port 12 increases, the discharge amount from the discharge port 14 increases, and the amount of powder per unit time from the coating gun 3 increases. Become.

次に、サブエアーノズル８から供給されるサブエアーは、主として、塗料タンク１の設置場所や、ガン配置によって搬送ホース６の長さ及びその抵抗が異なるため、粉体塗料Ａが搬送ホース６内を均一に安定した速度で搬送する役目を担っている。   Next, since the sub air supplied from the sub air nozzle 8 mainly has the length of the transport hose 6 and the resistance thereof depending on the installation location of the paint tank 1 and the arrangement of the gun, the powder paint A passes through the transport hose 6. It is responsible for transporting at a uniform and stable speed.

塗装時は、メインエアーノズル７とサブエアーノズル８からメインエアーとサブエアーの２つのエアーがインジェクター２に供給され、塗料タンク１内の粉体塗料Ａが、吸引管１６、吸引口１２、吐出口１４、搬送ホース６を経て塗装ガン３から粉体塗料が吐出される。   At the time of painting, the main air and sub air are supplied from the main air nozzle 7 and the sub air nozzle 8 to the injector 2, and the powder paint A in the paint tank 1 is supplied to the suction pipe 16, the suction port 12, and the discharge port. 14, the powder paint is discharged from the coating gun 3 through the transport hose 6.

このメインエアーとサブエアーの調整は、次のように行われる。
メインエアー量（ｌ／ｍｉｎ）は、塗装ガン３から吐出する単位時間当たりの粉体塗料Ａの吐出量（ｇ／ｍｉｎ）が目的とする吐出量になるように、設定される。 The adjustment of the main air and the sub air is performed as follows.
The main air amount (l / min) is set so that the discharge amount (g / min) of the powder coating material A per unit time discharged from the coating gun 3 becomes the target discharge amount.

サブエアー量（ｌ／ｍｉｎ）は、被塗装物の形状等により設定した総エアー量からメインエアー量を差し引いた量に設定される。   The sub air amount (l / min) is set to an amount obtained by subtracting the main air amount from the total air amount set according to the shape of the object to be coated.

そして、総エアー量を変更する場合、例えば、総エアー量を１００（ｌ／ｍｉｎ）で運転していた塗装作業を、総エアー量を９０（ｌ／ｍｉｎ）に落として行う場合には、メインエアー量は変更させずに、サブエアー量だけを、１０（ｌ／ｍｉｎ）減少するように、サブエアーノズル８の流量絞り弁１１の開度を、電子制御装置１３により調整する。   When the total air amount is changed, for example, when the total air amount is reduced to 90 (l / min) and the painting work that has been operated at the total air amount is 100 (l / min), the main air amount is changed. The opening degree of the flow restrictor 11 of the sub air nozzle 8 is adjusted by the electronic control unit 13 so that only the sub air amount is reduced by 10 (l / min) without changing the air amount.

このように、総エアー量を変更しても、メインエアー量は変更されないので、粉体塗料の吐出量（ｇ／ｍｉｎ）を一定に保つことができる。   Thus, even if the total air amount is changed, the main air amount is not changed, so that the discharge amount (g / min) of the powder coating material can be kept constant.

したがって、予め計測しておいたメインエアー量と塗料吐出量の関係式を用いることで、現在の設定値（吐出指令値）に対する粉体塗料Ａの吐出量、即ち、単位時間当たりの吐出量（ｇ／ｍｉｎ）を計算で求めることができるので、この値を、メインエアーノズル８が稼働している時間に掛け合わすと、粉体塗料Ａの積算使用量を求めることができ、この積算使用量を粉体塗料タンク１の初期の塗料量から減算していくことにより、粉体塗料タンク１の残量を簡単に求めることができる。   Therefore, by using a relational expression between the main air amount and the paint discharge amount measured in advance, the discharge amount of the powder paint A with respect to the current set value (discharge command value), that is, the discharge amount per unit time ( g / min) can be obtained by calculation, and by multiplying this value by the time during which the main air nozzle 8 is operating, the accumulated usage amount of the powder coating material A can be obtained. Is subtracted from the initial amount of paint in the powder paint tank 1, the remaining amount of the powder paint tank 1 can be easily obtained.

例えば、吐出量の設置値が５０で、総エアー量の設定値が１００という条件で、インジェクター２を稼働させて、３０秒間スプレーした際の粉体塗料Ａの吐出量が実測値で６０ｇの場合、吐出量の設置値が４０で、５０分間稼動し、さらに吐出量の設定値が６０で、２０分間稼働した場合の塗料残量は次のように計算される。
なお、粉体塗料タンク１の初期の粉体塗料Ａの量は、１５ｋｇとする。
吐出量の設置値が１００の場合、１秒間当たりの吐出量は、
（６０ｇ／３０ｓｅｃ）×１００／５０＝４ｇ
吐出量の設置値が４０では、１秒間当たりの吐出量は、
（４ｇ）×４０／１００＝１．６ｇ
吐出量の設置値が６０では、１秒間当たりの吐出量は、
（４ｇ）×６０／１００＝２．４ｇ
となる。 For example, when the discharge amount of the powder coating material A when the injector 2 is operated and sprayed for 30 seconds under the condition that the installation value of the discharge amount is 50 and the set value of the total air amount is 100 is an actual measurement value of 60 g The remaining amount of paint when the setting value of the discharge amount is 40 and it is operated for 50 minutes and the setting value of the discharge amount is 60 and it is operated for 20 minutes is calculated as follows.
The initial amount of the powder paint A in the powder paint tank 1 is 15 kg.
When the installation value of the discharge amount is 100, the discharge amount per second is
(60g / 30sec) × 100/50 = 4g
When the installation value of the discharge amount is 40, the discharge amount per second is
(4g) × 40/100 = 1.6g
When the installation value of the discharge amount is 60, the discharge amount per second is
(4g) × 60/100 = 2.4g
It becomes.

したがって、初期の粉体塗料Ａの量を１５ｋｇから現在の塗料残量は、
１５０００ｇ−（１．６ｇ×３０００ｓｅｃ）−（２．４ｇ×１２００ｓｅｃ）＝７３２０ｇ
になる。 Therefore, the amount of the current powder paint A from 15 kg of the initial powder paint A,
15000 g- (1.6 g × 3000 sec) − (2.4 g × 1200 sec) = 7320 g
become.

１ 粉体塗料タンク
２ インジェクター
３ 塗装ガン
４ 多孔質板
５ コンプレサーエアー
６ 搬送ホース
７ メインエアーノズル
８ サブエアーノズル
９ 圧縮エアー源
１０、１１ 流量絞り弁
１２ 吸引口
１３ 電子制御装置
１４ 吐出口
１５ 減圧弁
１６ 吸引管
Ａ 粉体塗料 DESCRIPTION OF SYMBOLS 1 Powder coating tank 2 Injector 3 Coating gun 4 Porous board 5 Compressor air 6 Conveyance hose 7 Main air nozzle 8 Sub air nozzle 9 Compressed air sources 10 and 11 Flow rate throttle valve 12 Suction port 13 Electronic control unit 14 Ejection port 15 Depressurization Valve 16 Suction tube A Powder paint

Claims (3)

圧縮エアー源に流量絞り弁を介して接続されるメインエアーノズルを有し、このメインエアーノズルから供給されるメインエアーによって粉体塗料タンクから粉体塗料を吸引し、吐出口から搬送ホースを介して粉体塗装ガンに粉体塗料のエアー搬送を行うインジェクターを備え、インジェクターにサブエアーを供給する、圧縮エアー源に流量絞り弁を介して接続されるサブエアーノズルを設け、メインエアーノズルの流量絞り弁と、サブエアーノズルの流量絞り弁を調節する電子制御装置を備え、上記電子制御装置に、インジェクターの稼働時間を積算し、その積算時間に、単位時間当たりの粉体塗料の吐出量を掛けあわせて計算した粉体塗料積算使用量を計算し、粉体塗料タンクの初期投入量から粉体塗料積算使用量を減算して粉体塗料タンクの残量を計測する残量計測プログラムを内蔵させたことを特徴とする粉体塗装装置における塗料残量計測装置。   It has a main air nozzle connected to the compressed air source via a flow restrictor, and the main air supplied from this main air nozzle sucks the powder paint from the powder paint tank and passes it from the discharge port through the transport hose. The powder coating gun is equipped with an injector that conveys the powder coating air, and the sub air nozzle connected to the compressed air source via the flow throttle valve is provided to supply the sub air to the injector. And an electronic control unit that adjusts the flow throttle valve of the sub air nozzle. The operating time of the injector is added to the electronic control unit, and the amount of powder paint discharged per unit time is multiplied by the total time. Calculate the total amount of powder paint used, and subtract the amount of powder paint accumulated from the initial charge in the powder paint tank. Coating amount measuring apparatus of the powder coating apparatus characterized by incorporated therein a fuel gauging program for measuring the remaining amount of click. 上記粉体塗装ガンが静電塗装ガンである請求項１記載の粉体塗装装置における塗料残量計測装置。   2. The paint remaining amount measuring device in the powder coating apparatus according to claim 1, wherein the powder coating gun is an electrostatic coating gun. 粉体塗料タンクの残量が、予め入力した値を下回った場合に、警告表示あるいは粉体塗料の補充表示を行うことを特徴とする請求項１又は２記載の粉体塗装装置における塗料残量計測装置。
3. The paint remaining amount in the powder coating apparatus according to claim 1, wherein when the remaining amount of the powder paint tank falls below a pre-input value, a warning display or a replenishment display of the powder paint is performed. Measuring device.
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JP2001293422A (en) * 1994-10-11 2001-10-23 Nordson Corp Powder coating material supply device
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KR102670335B1 (en) * 2022-05-25 2024-05-29 주식회사 제이비앤아이 Apparatus for Supplying Powder Paint

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