JPH0549058U - Coating equipment - Google Patents
Coating equipmentInfo
- Publication number
- JPH0549058U JPH0549058U JP9821791U JP9821791U JPH0549058U JP H0549058 U JPH0549058 U JP H0549058U JP 9821791 U JP9821791 U JP 9821791U JP 9821791 U JP9821791 U JP 9821791U JP H0549058 U JPH0549058 U JP H0549058U
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- paint
- circulation system
- paint circulation
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Abstract
(57)【要約】
【目的】 吐出量の安定化により、塗装不良の発生を防
止する。
【構成】 一次側塗料循環系１と、脈動吸収用アキュム
レータ８が設けられた二次側塗料循環系２とを備える。
一次側塗料循環系と二次側塗料循環系との接続部に、塗
料循環状態と塗料供給状態とに相互に切換える三方切換
弁９を設ける。塗料循環状態で、一次側塗料循環系から
の塗料の供給を遮断し、かつ二次側塗料循環系を循環可
能に連通状態にする。塗料供給状態で、二次側塗料循環
系の塗料の循環を遮断し、かつ上記一次側塗料循環系を
二次側塗料循環系に連通する。
(57) [Summary] [Purpose] Prevents defective coating by stabilizing the discharge rate. [Structure] A primary side paint circulation system 1 and a secondary side paint circulation system 2 provided with a pulsation absorbing accumulator 8 are provided.
A three-way switching valve 9 for switching between a paint circulating state and a paint supplying state is provided at a connecting portion between the primary side paint circulating system and the secondary side paint circulating system. In the paint circulation state, the supply of the paint from the primary side paint circulation system is cut off, and the secondary side paint circulation system is put into a circulatory communication state. In the paint supply state, the circulation of the paint in the secondary-side paint circulation system is shut off, and the primary-side paint circulation system is connected to the secondary-side paint circulation system.
Description
【０００１】[0001]
本考案は、二つの塗料循環系を備えた塗装装置に関するものである。 The present invention relates to a coating device having two paint circulation systems.
【０００２】[0002]
従来より、塗装装置としては、塗装ガンから吹出す塗料の色を切換えるための カラーチェンジバルブを備えたものが知られている（例えば、特開平１−２６２ ９６３号公報参照）。この種の塗装装置では、例えば図５に示すように、複数種 類の塗装色に応じた複数の塗料の塗料供給通路ａ，ａ，…がカラーチェンジバル ブｂに接続され、このカラーチェンジバルブｂは塗装対象、例えば車体ごとに定 められた塗装色に該当する塗料の塗料供給通路ａのみを上記塗装ガンｃに連通し 、該当しない他の色の塗料の塗料供給通路ａ，ａ，…を遮断するようになってい る。この場合、遮断された塗料供給通路ａ，ａ，…内の塗料の固結を防止する必 要があるために、その塗料供給通路ａ，ａ，…内の塗料を循環させるようにリタ ーン通路ｄを設けて塗料の循環系を構成することが、一般的に行われている。ま た、塗料タンクなどの設置場所と、上記塗装ガンｃによる塗装場所とが比較的遠 く離れている場合には、塗料を比較的高圧で圧送する一次側塗料循環系ｆと、比 較的低圧で圧送する二次側塗料循環系ｅとに分けて、それぞれで独立して塗料を 循環させることが、一般的に行われている。そして、この場合、圧送用ポンプｇ の脈動を吸収するために、一般的に、上記循環系内に封入エアー部ｈを有する脈 動吸収用アキュムレータｉが設けられており、また、一次側塗料循環系ｆと二次 側塗料循環系ｅとの間には圧力調整弁ｊが設けられている。 2. Description of the Related Art Conventionally, as a coating apparatus, one provided with a color change valve for switching the color of the coating material blown out from a coating gun is known (see, for example, Japanese Patent Laid-Open No. 1-262963). In this type of coating apparatus, for example, as shown in FIG. 5, paint supply passages a, a, ... For a plurality of paints corresponding to a plurality of kinds of coating colors are connected to a color change valve b, and this color change valve is used. b is a coating object, for example, only the paint supply passage a of the paint corresponding to the paint color determined for each vehicle body is communicated with the coating gun c, and the paint supply passages a, a, ... It is designed to shut down. In this case, since it is necessary to prevent the solidification of the paint in the blocked paint supply passages a, a, ..., It is necessary to circulate the paint in the paint supply passages a, a ,. It is common practice to provide a passage d to form a paint circulation system. In addition, when the installation location of the paint tank or the like and the painting location of the above-mentioned painting gun c are relatively far apart, a comparison is made with the primary-side paint circulation system f that sends the paint at a relatively high pressure. It is generally practiced to separately circulate the paint independently of the secondary-side paint circulation system e that is fed under low pressure. Further, in this case, in order to absorb the pulsation of the pressure pump g, a pulsation absorbing accumulator i having an enclosed air portion h is generally provided in the circulation system, and the primary side paint circulation A pressure regulating valve j is provided between the system f and the secondary paint circulation system e.
【０００３】[0003]
ところが、上記ポンプｇがピストンポンプである場合、その吸込み行程時に上 記脈動吸収チューブｉ内の封入エアー部ｈが減圧されると、上記圧力調整弁ｊを 通して一次側塗料循環系ｆの塗料が二次側塗料循環系ｅに流入するおそれがある 。特に、上記リターン通路ｄが長い場合は圧損が生じ易く、上記リターン通路ｄ の下流端側の圧力が上記圧力調整弁ｊの出口側よりも低下することがあるために 、上記塗料の流入が増大する傾向にある。そして、この塗料の流入が繰り返され ると、二次側塗料循環系ｅ内を循環する塗料の量が徐々に増加して、この増加分 の塗料が脈動吸収用アキュムレータｉ内に蓄積される結果、このアキュムレータ ｉ内の封入エアー部ｈが過剰に圧縮されて、所定の脈動吸収機能を発揮すること ができなくなる。その結果、塗装ガンｃからの塗料の吐出量が不安定になり、タ レやスケなどの塗装不良が発生しやすくなるという不都合が生じる。 However, in the case where the pump g is a piston pump, when the enclosed air portion h in the pulsation absorbing tube i is depressurized during the suction stroke, the paint of the primary side paint circulation system f is passed through the pressure adjusting valve j. May flow into the secondary side paint circulation system e. In particular, when the return passage d is long, pressure loss is likely to occur, and the pressure on the downstream end side of the return passage d 1 may be lower than that on the outlet side of the pressure regulating valve j, so that the inflow of the paint increases. Tend to do. When this flow of paint is repeated, the amount of paint circulating in the secondary side paint circulation system e gradually increases, and the increased amount of paint accumulates in the pulsation absorbing accumulator i. However, the enclosed air portion h in the accumulator i is excessively compressed, and the predetermined pulsation absorbing function cannot be exerted. As a result, the amount of coating material discharged from the coating gun c becomes unstable, and coating defects such as sagging and scaling easily occur.
【０００４】 この考案は、このような事情に鑑みてなされたものであり、その目的とすると ころは、上記脈動吸収用アキュムレータの脈動吸収機能を所定状態に保つことに より、塗装不良の発生を防止することにある。The present invention has been made in view of the above circumstances, and an object thereof is to keep the pulsation absorbing function of the pulsation absorbing accumulator in a predetermined state to prevent the occurrence of coating defects. To prevent.
【０００５】[0005]
上記目的を達成するために、請求項１記載の考案は、一次側塗料循環系と、こ の一次側塗料循環系から塗料の供給を受ける二次側塗料循環系とを備え、上記二 次側塗料循環系に脈動吸収用アキュムレータが設けられた塗装装置において、上 記一次側塗料循環系と二次側塗料循環系との接続部に、塗料循環状態と塗料供給 状態とに相互に切換える切換弁を設ける。上記塗料循環状態で、上記一次側塗料 循環系から二次側塗料循環系への塗料の供給を遮断しかつ上記二次側塗料循環系 を循環可能に連通させ、上記塗料供給状態で、上記二次側塗料循環系の塗料の循 環を遮断しかつ上記一次側塗料循環系と二次側塗料循環系とを連通させる構成と するものである。 In order to achieve the above-mentioned object, a device according to claim 1 is provided with a primary side paint circulating system and a secondary side paint circulating system which receives a supply of paint from the primary side paint circulating system, In a coating device having a pulsation absorbing accumulator in the paint circulation system, a switching valve that switches between the paint circulation state and the paint supply state at the connection between the primary side circulation system and the secondary side circulation system. To provide. In the paint circulation state, the supply of the paint from the primary side paint circulation system to the secondary side paint circulation system is shut off and the secondary side paint circulation system is circulated so that the paint can be circulated. The circulation of the paint in the secondary paint circulation system is cut off, and the primary paint circulation system and the secondary paint circulation system are communicated with each other.
【０００６】[0006]
上記の構成により、請求項１記載の考案では、塗料循環時には切換弁を塗料循 環状態に切換えることにより、二次側塗料循環系が循環可能に連通されるととも に一次側塗料循環系からの塗料の供給が完全に遮断されて、上記二次側塗料循環 系内を循環する塗料の量が確実に一定に保たれるために、脈動吸収用アキュムレ ータ内の封入エアー部が所定状態に保たれて、所定の脈動吸収機能が維持される 。このため、この二次側塗料循環系から塗料が塗装のために供給される塗料供給 状態に切換えられても、脈動が安定して吸収されるために、塗料の吐出量が不安 定になることはない。 With the above construction, in the device according to claim 1, by switching the changeover valve to the paint circulating state during the paint circulation, the secondary side paint circulating system is circulated and communicated with the primary side paint circulating system. The supply of paint is completely shut off and the amount of paint circulating in the secondary paint circulation system is kept constant, so the enclosed air section in the pulsation absorbing accumulator is in a specified state. Is maintained at a predetermined level to maintain a predetermined pulsation absorption function. Therefore, even if the paint is supplied from the secondary side paint circulation system to the paint supply state for painting, the pulsation is stably absorbed, and the discharge amount of the paint becomes unstable. There is no.
【０００７】[0007]
以下、本考案の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【０００８】 図１は、本考案の実施例に係る塗装装置を示す。同図において、１は図示しな い塗料のミキシングルームで複数の所定の色に調合された各色の塗料を車体の塗 装ラインにおける塗装ブースまで各色ごとに圧送する一次側塗料循環系、２はこ の一次側塗料循環系１に接続されて上記塗装ブース内に配置された二次側塗料循 環系、３はこの二次側塗料循環系２に接続されたカラーチェンジバルブ、４は硬 化剤供給通路、５は塗装ガンである。本塗装装置では、各一つの一次側塗料循環 系１及び二次側塗料循環系２の一組によって一色の塗料についての塗料供給系が 構成され、上記塗装ラインに供給される車体ごとに定められた複数種類の塗装色 に対応して複数の塗料供給系が設けられている。なお、図１では、各一つの一次 側塗料循環系１及び二次側塗料循環系２からなる一つの塗料供給系のみを詳細に 図示し、他の塗料供給系は上記のものと同じ構成であるため、詳細な図示を省略 している。FIG. 1 shows a coating apparatus according to an embodiment of the present invention. In the figure, 1 is a primary-side paint circulation system that pumps each color paint mixed in a plurality of predetermined colors in a paint mixing room (not shown) for each color to a paint booth in a vehicle body coating line. The secondary side paint circulating system connected to the primary side paint circulating system 1 and arranged in the coating booth, 3 is a color change valve connected to the secondary side paint circulating system 2, and 4 is a hardening system. The agent supply passages 5 are coating guns. In this coating apparatus, a set of one primary side paint circulation system 1 and one secondary side paint circulation system 2 constitutes a paint supply system for one color of paint, and is defined for each vehicle body supplied to the above painting line. In addition, multiple paint supply systems are provided for multiple types of paint colors. It should be noted that in FIG. 1, only one paint supply system consisting of one primary paint circulation system 1 and one secondary paint circulation system 2 is shown in detail, and the other paint supply systems have the same configuration as the above. Therefore, detailed illustration is omitted.
【０００９】 以下に、上記一つの塗料供給系を構成する一次側塗料循環系１及び二次側塗料 循環系２について説明するに、上記一次側塗料循環系１は、上記ミキシングルー ムから複数色の内の一色の塗料を図示しないポンプにより比較的高圧（例えば、 ３．０Ｋｇ／ｃｍ2 程度）で上記二次側塗料循環系２まで圧送する一次側供給通 路１ａと、この一次側供給通路１ａの下流端側に接続されて一次側供給通路１ａ 内の塗料をリターンさせる一次側リターン通路１ｂとを備えており、上記一次側 供給通路１ａの下流端は圧力調整弁６に接続されている。Hereinafter, the primary side paint circulation system 1 and the secondary side paint circulation system 2 which compose the one paint supply system will be described. The primary side paint circulation system 1 is composed of a plurality of colors from the mixin group. A primary side supply passage 1a for pumping one color of the paint to a secondary side paint circulation system 2 at a relatively high pressure (for example, about 3.0 Kg / cm 2 ) by a pump not shown, and the primary side supply passage 1a. 1a and a primary side return passage 1b which is connected to the downstream end side of the primary side supply passage 1a to return the paint in the primary side supply passage 1a. The downstream end of the primary side supply passage 1a is connected to the pressure adjusting valve 6. ..
【００１０】 上記二次側塗料循環系２は上記圧力調整弁６を介して上記一次側塗料循環系１ に接続されており、上記圧力調整弁６は一次側塗料循環系１と二次側塗料循環系 ２との接続部を構成している。この二次側塗料循環系２は、上記圧力調整弁６に よって比較的低圧（例えば１．０Ｋｇ／ｃｍ2 程度）に圧力調整された塗料を圧 送する二次側供給通路２ａと、この二次側供給通路２ａ内の塗料をリターンさせ る二次側リターン通路２ｂと、上記二次側供給通路２ａに介在されたポンプ７及 び脈動吸収用アキュムレータ８とを備えている。上記二次側供給通路２ａの上流 端は三方切換弁９を介して上記圧力調整弁６の下流側である出口に接続され、下 流端は上記カラーチェンジバルブ３に接続されている。このカラーチェンジバル ブ３より上流側の各二次側供給通路２ａから二次側リターン通路２ｂの上流端が 分岐され、この二次側リターン通路２ｂの下流端は上記三方切換弁９に接続され ている。The secondary paint circulation system 2 is connected to the primary paint circulation system 1 via the pressure control valve 6, and the pressure regulation valve 6 is connected to the primary paint circulation system 1 and the secondary paint. It constitutes a connection with the circulatory system 2. The secondary-side paint circulation system 2 is provided with a secondary-side supply passage 2a for feeding the paint whose pressure is adjusted to a relatively low pressure (for example, about 1.0 Kg / cm 2 ) by the pressure adjusting valve 6 and the secondary supply passage 2a. A secondary return passage 2b for returning the paint in the secondary supply passage 2a, a pump 7 and a pulsation absorbing accumulator 8 interposed in the secondary supply passage 2a are provided. The upstream end of the secondary supply passage 2a is connected to the outlet on the downstream side of the pressure adjusting valve 6 via a three-way switching valve 9, and the downstream end is connected to the color change valve 3. The upstream end of the secondary return passage 2b is branched from each secondary supply passage 2a upstream of the color change valve 3, and the downstream end of the secondary return passage 2b is connected to the three-way switching valve 9. ing.
【００１１】 上記ポンプ７はピストンポンプにより構成されて、吸込み行程及び吐出し行程 の繰り返しにより塗料を圧送するようになっている。The pump 7 is composed of a piston pump and pressure-feeds the coating material by repeating the suction stroke and the discharge stroke.
【００１２】 上記脈動吸収用アキュムレータ８は、上記ポンプ７の下流側の二次側供給通路 ２ａに連通して設けられた本体チューブ８ａと、この本体チューブ８ａ内に圧縮 エアーが充填されて形成されたエアー部８ｂと、このエアー部８ｂに接して充填 された塗料部８ｃとからなり、上記エアー部８ｂのクッション作用により脈動を 吸収するようになっている。The pulsation absorbing accumulator 8 is formed by a main body tube 8a provided in communication with the secondary side supply passage 2a on the downstream side of the pump 7, and the main body tube 8a filled with compressed air. The air portion 8b and the paint portion 8c filled in contact with the air portion 8b are arranged to absorb the pulsation by the cushioning action of the air portion 8b.
【００１３】 上記各二次側塗料循環系２の三方切換弁９は、図２及び図３に示すように、二 つの入口ポート９ａ，９ｂと一つの出口ポート９ｃとを備えており、上記一方の 入口ポート９ａには上記二次側リターン通路２ｂの下流端が、他方の入口ポート ９ｂには上記圧力調整弁６を介して一次側供給通路１ａの下流端が、上記出口ポ ート９ｃには二次側供給通路２ａの上流端がそれぞれ接続されている。そして、 上記三方切換弁９は、ノーマル位置としての塗料供給状態（図２に示す状態）と 、図示しないエアー源からのエアー９ｄがＯＮ信号として導入されて弁が駆動さ れた塗料循環状態（図３に示す状態）との間を切換え可能になっている。As shown in FIGS. 2 and 3, the three-way switching valve 9 of each secondary side paint circulation system 2 is provided with two inlet ports 9a and 9b and one outlet port 9c. The downstream end of the secondary return passage 2b is connected to the inlet port 9a, and the downstream end of the primary supply passage 1a is connected to the other inlet port 9b via the pressure regulating valve 6 to the outlet port 9c. Are connected to the upstream ends of the secondary supply passages 2a. The three-way switching valve 9 is in the normal position and is in the paint supply state (the state shown in FIG. 2) and the paint circulating state in which the air 9d from an air source (not shown) is introduced as an ON signal to drive the valve ( The state (shown in FIG. 3) can be switched.
【００１４】 上記塗料供給状態では、上記三方切換弁９によって上記一次側供給通路１ａと 二次側供給通路２ａとが連通され、かつ上記二次側リターン通路２ｂと上記二次 側供給通路２ａとが遮断されるようになっており、その結果、一次側供給通路１ ａから二次側供給通路２ａへ塗料が供給される。また、上記塗料循環状態では、 上記二次側リターン通路２ｂと上記二次側供給通路２ａとが連通され、かつ上記 一次側供給通路１ａと上記二次側供給通路２ａとが遮断されるようになっており 、その結果、上記一次側塗料循環系１からの塗料の流入が阻止されて、上記一次 側塗料循環系１及び二次側塗料循環系２のそれぞれで、供給通路１ａ，２ａ内の 塗料がリターン通路１ｂ，２ｂにより上記供給通路１ａ，２ａの上流側にリター ンされて循環する。In the paint supply state, the three-way switching valve 9 connects the primary side supply passage 1a and the secondary side supply passage 2a, and the secondary side return passage 2b and the secondary side supply passage 2a. Is blocked, and as a result, the paint is supplied from the primary side supply passage 1a to the secondary side supply passage 2a. Further, in the paint circulation state, the secondary return passage 2b and the secondary supply passage 2a are communicated with each other, and the primary supply passage 1a and the secondary supply passage 2a are blocked. As a result, the inflow of the paint from the primary side paint circulation system 1 is blocked, and in the primary side paint circulation system 1 and the secondary side paint circulation system 2, respectively, in the supply passages 1a and 2a. The paint is returned to the upstream side of the supply passages 1a and 2a by the return passages 1b and 2b and circulates.
【００１５】 上記カラーチェンジバルブ３は、スタティックミキサー１２に接続されており 、塗装ラインに搬送される車体ごとに予め定められている色の塗料の二次側供給 通路２ａのみを選択的に開いて、その色の塗料を上記スタティックミキサー１２ に供給するようになっている。そして、上記カラーチェンジバルブ３の作動に連 動して上記各二次側塗料循環系２の三方切換弁９の作動が行われるようになって おり、上記カラーチェンジバルブ３で開選択される二次側塗料循環系２の三方切 換弁９のみが塗料供給状態に維持されるとともに、開選択されない他の二次側塗 料循環系２の三方切換弁９は塗料循環状態にされる。The color change valve 3 is connected to the static mixer 12, and selectively opens only the secondary side supply passage 2a for the paint of a predetermined color for each vehicle body conveyed to the coating line. The paint of that color is supplied to the static mixer 12. Then, the three-way switching valve 9 of each secondary side paint circulation system 2 is operated in synchronism with the operation of the color change valve 3, and the color change valve 3 is selected to open. Only the three-way switching valve 9 of the secondary paint circulation system 2 is maintained in the paint supply state, and the other three-way switching valves 9 of the secondary paint circulation system 2 not selected to be opened are brought into the paint circulation state.
【００１６】 上記硬化剤供給通路４は、図示しない硬化剤容器及び圧送ポンプから塗装ブー スまで、硬化剤を、上記塗料の場合と同様に比較的高圧で供給する一次側硬化剤 供給通路４ａと、上記塗装ブース内に設けられて上記硬化剤を比較的低圧で圧送 する二次側硬化剤供給通路４ｂとを備えている。この二次側硬化剤供給通路４ｂ の上流端は圧力調整弁１３を介して上記一次側硬化剤供給通路４ａに接続され、 下流端は上記スタティックミキサー１２に接続されている。そして、この二次側 硬化剤供給通路４ｂには、上流側からポンプ１４、脈動吸収用アキュムレータ１ ５、レギュレータ１６及び流量計１７が設けられている。The curing agent supply passage 4 includes a primary side curing agent supply passage 4a for supplying the curing agent at a relatively high pressure from the curing agent container and the pressure feed pump (not shown) to the coating boot, as in the case of the coating material. A secondary-side curing agent supply passage 4b is provided in the coating booth and supplies the curing agent at a relatively low pressure. An upstream end of the secondary side hardener supply passage 4b is connected to the primary side hardener supply passage 4a via a pressure adjusting valve 13, and a downstream end thereof is connected to the static mixer 12. A pump 14, a pulsation absorbing accumulator 15, a regulator 16 and a flow meter 17 are provided from the upstream side in the secondary side hardener supply passage 4b.
【００１７】 上記スタティックミキサー１２は、カラーチェンジバルブ３から供給される主 剤としての塗料と、上記二次側硬化剤供給通路４ｂから供給される硬化剤とを混 合し、この混合された塗装剤を塗装ガン５に供給するようになっている。The static mixer 12 mixes a coating material as a main component supplied from the color change valve 3 and a curing agent supplied from the secondary side curing agent supply passage 4b, and the mixed coating. The agent is supplied to the coating gun 5.
【００１８】 なお、図１中、１０は圧力調整弁６の出口側に設けられて、塗料中の微細なご みを除去するフィルター、１１はレギュレータである。In FIG. 1, 10 is a filter provided on the outlet side of the pressure regulating valve 6 for removing fine dust in the paint, and 11 is a regulator.
【００１９】 次に、上記構成の塗装装置の作用・効果について説明する。Next, the operation and effect of the coating apparatus having the above configuration will be described.
【００２０】 上記塗装装置では、スタティックミキサー１２に塗装ラインの車体の塗装色に 対応した塗料が送られるように、カラーチェンジバルブ３で上記塗装色に該当す る塗料供給系の二次側供給通路２ａのみが開選択される。これにより、その開選 択された二次側供給通路２ａの三方切換弁９が塗料供給状態にされるとともに、 上記塗装色に該当しない他の塗料供給系の二次側供給通路２ａの三方切換弁９が 塗料循環状態にされる。In the above coating apparatus, the color change valve 3 is used to send the paint corresponding to the paint color of the vehicle body of the paint line to the static mixer 12, and the secondary side supply passage of the paint supply system corresponding to the above paint color is applied. Only 2a is open selected. As a result, the three-way switching valve 9 of the selected secondary-side supply passage 2a is set to the paint supply state, and the three-way switching of the secondary-side supply passage 2a of the other paint supply system that does not correspond to the above-mentioned coating color. The valve 9 is put into the paint circulation state.
【００２１】 この結果、上記塗装色に該当する塗料供給系では、ミキシングルームから所定 色に調合された塗料が一次側供給通路１ａ内を通して比較的高圧で圧力調整弁６ まで圧送され、この圧力調整弁６で所定の低圧状態に圧力調整された上記塗料が フィルター１０及び三方切換弁９を通して二次側供給通路２ａに流入する。そし て、ポンプ７によって上記二次側供給通路２ａ内を圧送されて、上記カラーチェ ンジバルブ３を通してスタティックミキサー１２まで送られる。その後、このス タティックミキサー１２で硬化剤供給通路４からの硬化剤と混合されて、この混 合された塗装剤が塗装ガン５によって車体に吹付けられる。この際、上記二次側 塗料循環系２のポンプ７が吐出し行程にあるときには、上記上記塗料部８ｃに塗 料が流入して上記エアー部８ｂが加圧状態になり、吸込み行程にあるときには、 脈動吸収チューブ８内の塗料部８ｃの塗料が上記エアー部８ｂの押圧力によって 二次側供給通路２ａに流出してエアー部８ｂが減圧状態になる。これらが繰り返 されて上記ポンプ７の脈動が吸収されるため、カラーチェンジバルブ３を介して 塗装ガン５から吐出される塗料の量が安定し、タレ、スケなどの塗装不良の発生 を防止することができる。As a result, in the paint supply system corresponding to the above-mentioned paint color, the paint mixed in a predetermined color from the mixing room is pressure-fed to the pressure adjusting valve 6 at a relatively high pressure through the inside of the primary side supply passage 1a, and this pressure adjustment is performed. The paint whose pressure is adjusted to a predetermined low pressure state by the valve 6 flows into the secondary side supply passage 2a through the filter 10 and the three-way switching valve 9. Then, the secondary side supply passage 2a is pressure-fed by the pump 7 and is fed to the static mixer 12 through the color change valve 3. Thereafter, the static mixer 12 mixes the hardener from the hardener supply passage 4 and the mixed paint is sprayed onto the vehicle body by the paint gun 5. At this time, when the pump 7 of the secondary side paint circulation system 2 is in the discharge stroke, the coating material flows into the paint portion 8c, the air portion 8b is in a pressurized state, and in the suction stroke. The paint in the paint portion 8c in the pulsation absorbing tube 8 flows out to the secondary side supply passage 2a by the pressing force of the air portion 8b, and the air portion 8b is in a reduced pressure state. Since the pulsation of the pump 7 is absorbed by repeating these steps, the amount of paint discharged from the coating gun 5 via the color change valve 3 is stabilized, and the occurrence of coating defects such as sagging and scaling is prevented. be able to.
【００２２】 一方、三方切換弁９が塗料循環状態にされた上記他の塗料供給系では、一次側 塗料循環系１内の塗料が一次側供給通路１ａ及び一次側リターン通路１ｂを循環 し、また、二次側塗料循環系２内の塗料が二次側供給通路２ａ及び二次側リター ン通路２ｂを循環する。この際、一次側塗料循環系１と二次側塗料循環系２とは 上記三方切換弁９によって完全に遮断されているために、ポンプ７の吸込み行程 及び吐出し行程の繰り返し作動に伴う上記一次側塗料循環系１内の塗料の二次側 塗料循環系２側への流入を確実に阻止することができ、二次側塗料循環系２内の 塗料の循環量を確実に一定に保つことができる。従って、脈動吸収チューブ８の 塗料部８ｃ及びエアー部８ｂが確実に所定の状態に保たれるため、そのエアー部 ８ｂによる脈動吸収機能を確実に維持することができ、これにより、塗料供給状 態における塗料の吐出を安定した状態に確実に維持することができ、塗装不良の 発生を確実に防止することができる。On the other hand, in the other paint supply system in which the three-way switching valve 9 is in the paint circulation state, the paint in the primary-side paint circulation system 1 circulates in the primary-side supply passage 1a and the primary-side return passage 1b, and The paint in the secondary paint circulation system 2 circulates in the secondary supply passage 2a and the secondary return passage 2b. At this time, since the primary side paint circulation system 1 and the secondary side paint circulation system 2 are completely shut off by the three-way switching valve 9 described above, the above primary operation accompanying the repeated operation of the suction stroke and the discharge stroke of the pump 7 is performed. It is possible to reliably prevent the paint in the side paint circulation system 1 from flowing into the secondary side paint circulation system 2 side, and to reliably keep the circulation amount of the paint in the secondary side paint circulation system 2 constant. it can. Therefore, the paint portion 8c and the air portion 8b of the pulsation absorbing tube 8 are reliably kept in a predetermined state, so that the pulsation absorbing function of the air portion 8b can be surely maintained, whereby the paint supply state. It is possible to reliably maintain the discharge of the paint in a stable state and reliably prevent the occurrence of coating defects.
【００２３】 なお、本考案は上記実施例に限定されるものではなく、その他種々の変形例を 包含するものである。例えば、上記実施例では、切換弁として三方切換弁９を用 い、この三方切換弁９の切換操作によって二次側塗料循環系を塗料供給状態と塗 料循環状態とに切換えるように構成しているが、これに限らず、例えば図４に示 すように、二次側リターン通路２ｂの下流端と二次側供給通路２ａとの合流部２ ｃ近傍に設けた逆止弁１８と開閉弁１９との組合わせにより上記切換弁を構成し てもよい。この場合、上記逆止弁１８を上記合流部２ｃよりも上流側の二次側リ ターン通路２ｂに、上記開閉弁１９を上記合流部２ｃよりも上流側の二次側供給 通路２ａにそれぞれ設け、上記開閉弁１９の開閉操作によって上記塗料供給状態 と塗料循環状態とに切換えればよい。すなわち、上記開閉弁１９を開操作するこ とにより一次側塗料循環系から塗料の供給が行われる塗料供給状態に、閉操作す ることにより上記塗料の供給が遮断されて塗料循環状態に切換わる。そして、上 記塗料供給状態では上記逆止弁１８により塗料の二次側リターン通路２ｂへの流 入が防止され、また、上記塗料循環状態では上記逆止弁１８を通して上記二次側 リターン通路２ｂの塗料が二次側供給通路２ａにリターンされる。It should be noted that the present invention is not limited to the above-described embodiment, and includes various other modified examples. For example, in the above embodiment, the three-way switching valve 9 is used as the switching valve, and the switching operation of the three-way switching valve 9 switches the secondary side paint circulation system between the paint supply state and the paint circulation state. However, the present invention is not limited to this, and as shown in FIG. 4, for example, a check valve 18 and an on-off valve provided near the confluence 2c of the downstream end of the secondary return passage 2b and the secondary supply passage 2a. The switching valve may be configured in combination with 19. In this case, the check valve 18 is provided in the secondary return passage 2b upstream of the merging portion 2c, and the on-off valve 19 is provided in the secondary supply passage 2a upstream of the merging portion 2c. The paint supply state and the paint circulation state may be switched by opening / closing the open / close valve 19. That is, when the opening / closing valve 19 is opened, the paint is supplied from the primary-side paint circulation system, and when the opening / closing valve 19 is closed, the supply of the paint is shut off to switch to the paint circulation state. .. In the above paint supply state, the check valve 18 prevents the paint from flowing into the secondary side return passage 2b. In the paint circulating state, the check valve 18 passes through the check valve 18 and the secondary side return passage 2b. Paint is returned to the secondary side supply passage 2a.
【００２４】 また、上記実施例では本考案をカラーチェンジバルブ３や硬化剤供給通路４を 備えた塗装装置に適用した場合を示しているが、これに限らず、上記カラーチェ ンジバルブなどを有しない、例えば一つの一次側塗料循環系及び一つの二次側塗 料循環系と、塗装ガンとからなる最も単純な塗装装置に本考案を適用してもよい 。この場合においても、塗料循環時の一次側塗料循環系側からの塗料の侵入を完 全に阻止することができ、所定の脈動吸収機能の維持を図り、吐出の安定化によ る塗装不良の発生を防止することができる。Further, in the above embodiment, the case where the present invention is applied to the coating apparatus having the color change valve 3 and the curing agent supply passage 4 is shown, but the present invention is not limited to this, and the color change valve or the like is not provided. For example, the present invention may be applied to the simplest coating device including one primary side paint circulation system, one secondary side paint circulation system, and a coating gun. Even in this case, it is possible to completely prevent the invasion of the paint from the primary side paint circulation system side during the circulation of the paint, to maintain the predetermined pulsation absorbing function, and to prevent the coating failure due to the stable discharge. Occurrence can be prevented.
【００２５】[0025]
以上説明したように、請求項１記載の考案における塗装装置によれば、塗料循 環時には切換弁を塗料循環状態に切換えることにより一次側塗料循環系からの塗 料の流入を完全に阻止することができ、上記二次側塗料循環系内を循環する塗料 を確実に一定量に保つことができるために、脈動吸収用アキュムレータの脈動吸 収機能を確実に所定の状態に維持することができる。このため、上記二次側塗料 循環系の塗料供給状態において、脈動の安定吸収による塗料の吐出量の安定化を 図ることができ、その結果、不安定な吐出に伴うタレやスケなどの塗装不良の発 生を確実に防止することができる。 As described above, according to the coating apparatus of the first aspect of the present invention, when the paint is circulated, the changeover valve is switched to the paint circulating state to completely prevent the inflow of the paint from the primary side paint circulating system. Since the amount of the paint circulating in the secondary side paint circulation system can be surely kept constant, the pulsation absorbing function of the pulsation absorbing accumulator can be surely maintained in a predetermined state. For this reason, in the above-mentioned secondary side paint circulation system paint supply state, it is possible to stabilize the discharge amount of the paint by stable absorption of pulsation, and as a result, coating defects such as sagging and scaling due to unstable discharge. It is possible to reliably prevent the occurrence of.
【図面の簡単な説明】[Brief description of drawings]
【図１】この考案の実施例を示す全体構成図である。FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.
【図２】塗料供給状態における三方切換弁を示す模式図
である。FIG. 2 is a schematic diagram showing a three-way switching valve in a paint supply state.
【図３】塗料循環状態における三方切換弁を示す模式図
である。FIG. 3 is a schematic diagram showing a three-way switching valve in a paint circulating state.
【図４】切換弁の他の態様を示す模式図である。FIG. 4 is a schematic view showing another aspect of the switching valve.
【図５】従来例を示す図１相当図である。FIG. 5 is a view corresponding to FIG. 1 showing a conventional example.
１ 一次側塗料循環系 ２ 二次側塗料循環系 ６ 圧力調整弁（接続部） ８ 脈動吸収用アキュムレータ ９ 三方切換弁（切換弁） 1 Primary side paint circulation system 2 Secondary side paint circulation system 6 Pressure control valve (connection part) 8 Pulsation absorbing accumulator 9 Three-way switching valve (switching valve)
Claims (1)
環系から塗料の供給を受ける二次側塗料循環系とを備
え、上記二次側塗料循環系に脈動吸収用アキュムレータ
が設けられた塗装装置において、 上記一次側塗料循環系と二次側塗料循環系との接続部に
は、上記一次側塗料循環系から二次側塗料循環系への塗
料の供給を遮断しかつ上記二次側塗料循環系を循環可能
に連通させる塗料循環状態と、上記二次側塗料循環系の
塗料の循環を遮断しかつ上記一次側塗料循環系と二次側
塗料循環系とを連通させる塗料供給状態とに相互に切換
える切換弁が設けられていることを特徴とする塗装装
置。1. A primary-side paint circulation system and a secondary-side paint circulation system that receives a supply of paint from this primary-side paint circulation system, wherein a pulsation-absorbing accumulator is provided in the secondary-side paint circulation system. In the coating device, at the connecting portion between the primary side paint circulation system and the secondary side paint circulation system, the supply of the paint from the primary side paint circulation system to the secondary side paint circulation system is cut off and the secondary side paint circulation system is connected. A paint circulation state in which the paint circulation system is circulated, and a paint supply state in which the circulation of the paint in the secondary side paint circulation system is cut off and the primary side paint circulation system and the secondary side paint circulation system are communicated with each other. A coating device characterized in that a switching valve for switching between the two is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9821791U JP2546473Y2 (en) | 1991-11-28 | 1991-11-28 | Painting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9821791U JP2546473Y2 (en) | 1991-11-28 | 1991-11-28 | Painting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0549058U true JPH0549058U (en) | 1993-06-29 |
| JP2546473Y2 JP2546473Y2 (en) | 1997-09-03 |
Family
ID=14213807
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9821791U Expired - Lifetime JP2546473Y2 (en) | 1991-11-28 | 1991-11-28 | Painting equipment |
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| Country | Link |
|---|---|
| JP (1) | JP2546473Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008001451A1 (en) * | 2006-06-27 | 2008-01-03 | Durr Japan K.K. | Paint supply system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5979732B2 (en) * | 2014-06-11 | 2016-08-31 | 本田技研工業株式会社 | Paint circulation system |
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1991
- 1991-11-28 JP JP9821791U patent/JP2546473Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008001451A1 (en) * | 2006-06-27 | 2008-01-03 | Durr Japan K.K. | Paint supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2546473Y2 (en) | 1997-09-03 |
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| Date | Code | Title | Description |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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