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WO1997018425A1 - Systeme et procede de regulation de volume d'air dans les fours de sechage apres peinture d'automobiles - Google Patents

Systeme et procede de regulation de volume d'air dans les fours de sechage apres peinture d'automobiles Download PDF

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Publication number
WO1997018425A1
WO1997018425A1 PCT/IB1995/001096 IB9501096W WO9718425A1 WO 1997018425 A1 WO1997018425 A1 WO 1997018425A1 IB 9501096 W IB9501096 W IB 9501096W WO 9718425 A1 WO9718425 A1 WO 9718425A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
painted
paint
procedure
oven
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.)
Ceased
Application number
PCT/IB1995/001096
Other languages
English (en)
Inventor
Antonello Boldrini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU41225/96A priority Critical patent/AU4122596A/en
Publication of WO1997018425A1 publication Critical patent/WO1997018425A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the object invention of this Patent consists of a system and procedure usable in conventional ovens for painted automobile vehicles and constitutes a revolutionary development furnishing an onginal regulating system of flow ventilation or air volume circulating in the cited cabin that permits a perfect water-based painted application to the body of automobile vehicles
  • This invention is inserted in the oven painted automobile vehicles sector, having been especially conceived for water-based paint jobs, that require some very special conditions for its application that are only provided by the system and procedure object of this Patent, given that such suitable work conditions with this type of paint are not actually known in the state-of-the-art
  • the paints that are not water-based do not require any air volume regulation inside the cabin due to its well-known chemical characte ⁇ stics, reason why in the conventional ovens the air circulates at an only constant velocity
  • the special nature and properties of the water-based paints make very recommendable for a perfect application of the same that this air volume inside the painted cabins is regulated, which is precisely furnished as an absolute development of this Patent
  • the innovation and original inventive step that bears the present invention lies in the user of the painted oven, by using water-based paints, can regulate willingly the air volume in the painted cycle, with the purpose of applying the paint at appropriate levels so that the water- based paints are applied in a fitting manner, such as 10,000, 1 1 ,000, 13,000 or 14,000 CFM, depending on which is more appropriate for the used water paint characteristics.
  • the air volume of the oven After producing this brief drying interval of the selected water- based paint layer, the air volume of the oven returns to regulating itself in order to reduce the appropriate levels during its application, during the necessary time for it.
  • the system and procedure object of this Patent has been foreseen that they can be adapted to any oven for painting automobile vehicles, which generally consists of a closed chamber where it is realized, on the one hand, the painted tasks with the help of the appropriate spray paint to each application in particular and, on the other hand, generally has a ventilating system consisting of a ventilator or compressor that drives the air inside ofthe said closed chamber with the purpose of faciliting drying and also the ulterior baking or hardening of paint.
  • the mentioned heating system has been foreseen, that by reason of its new special characteristics, what permits a considerable energy save since part of the heated entered air on its way through the heat exchanger and by effect of the regulating air it results excessive and does not enter the painted chamber, it is recycled another time towards the same admission duct.
  • this avoiding unnecessary loss of hot air, it also obtains other additional advantages, how to be able to obtain a greater efficiency of the radiators or heat exchangers that take charge of heating the air introduced in the chamber.
  • valves or air flow regulating elements have to act in a synchronized form since, in order to avoid pressure alterations in the inside painted cabin, they have to move coordinately in the preestablished positions. That is to say, if the admission air flow in the inside of the painted oven increases, the exit tail should increase and therefore the opening of the valve that regulates the exhaust air flow of the cited cabin or painted chamber, with the purpose of avoiding the mentioned pressure alterations in the inside said cabin, which can redound in a defective finish of the painted operations that were carried out.
  • the method for developing the system object of this Patent consists of the air that is introduced in the painted oven through a filter, in order to avoid any particle that in case it enters the mentioned automobile vehicles painted chamber it could damage the finish of the paint. Then, this air is introduced in a ventilator or compressor that pushes it, by means of an appropriate pipe to a heat exchanger in order to be heated in its path by the same. With this exit, the already heated air is driven towards the inside chamber of the painted oven, even though at will of the user of the same, part of this air can deviate by means of the already mentioned butterfly valve or regulating device and control of air tail used in the painted chamber of automobile vehicles.
  • the invention has foreseen the utilization of control elements and presentation of information relative to the different operations that are achieved in the successive paint cycles. Therefore, it can have timing elements in order to set in an automatic form the duration of certain operations, in function of the developed task and used water-based type paints. Likewise, on the outside ofthe chamber 3 bright indicating devices in colours yellow, green and red have been arranged to inform the operator about when he can pass to the following phase or paint cycle.
  • the lights green and yellow are activated alternatively in order to indicate that they are carrying out the operations or paint layer application phases (as much as 1 ,000 to 14,000 CFM, for example) with the colour green, or the drying operation of each one of the water-based paint layers (to 19,000 CFM), which is shown with the bright yellow colour indicator.
  • the bright red colour mechanism will only be activated during the baking cycle.
  • the time of the operation or drying phase of the water-based paint layers (yellow colour light), that is produced during the initial paint cycle can be preestablished by means of a conventional timer.
  • the activation of these phases whose lights inform about the phase that crosses the process of developed work in the painted oven, can be carried out by the user by means of a remote control or well by means of simple buttons.
  • the object invention of this Patent likewise foresees an improvement to the previous described system and method, consisting of the introduction of an automatic pressure controlled system in the inside chamber of the painted oven of automobile vehicles, consisting of a regulating system in closed loop or "feedback" made up of one or various pressure sensors, shared by the inside painted cabin, connected to a regulating element, which after processing the previous signals is capable of generating an exit that leads the movement of a servomotor connected to the butterflies or exit valve blades, producing a variation of the exit air tail opposite the detected pressure variations.
  • Figure 1 consisting of lateral elevated view of the entrance or air admission mechanism in the inside of the painted oven of automobile vehicles object of this Patent.
  • Figure 2 shows a lateral elevation of the exit mechanism or air ventilating evacuation of the painted ovens of automobile vehicles proposed in this Patent.
  • Figure 3 shows a lateral elevation of the painted oven with both admission and air ventilating evacuation mechanisms.
  • the air passes through a duct (2) to a ventilator (3) where it is pushed toward a heat exchanger (4), where it is warmed in its path across the same. Then, it arrives to a place where part or the totality of this hot air tail enters by the entrance (5) to the painted cabin for its ventilation, and another part of this hot air flow that leaves from the mentioned heat exchanger can be diverted by means of a butterfly valve (6), toward the former air entrance duct (2) where it mixes with the new tail that enters through the vent ( 1 ).
  • the mentioned butterfly valve (6) can adopt three positions, previously preestablished by the user of the system, being lead by a servomotor, it manages to regulate the quantity of air introduced in the chamber by means of the entrance duct (5).
  • this valve (6) offers a completely closed position (7), determinant that all the air that enters through the vent ( 1 ) and passes through the duct (2), through the ventilator (3) and the heat exchanger (4), is introduced by means of the entrance (5) in the painted chamber, which determines a maximum air volume level tail and 1 ,000 CFM, corresponding to the oven external signal to the air concentration that propels the bright yellow colour mechanism in the paint cycle, indicative of the drying operation subsequent to the application operation of a paint layer that is realized during this firs paint cycle, in the same manner as the colour red in the baking cycle.
  • the butterfly valve (6) When the butterfly valve (6) is propelled to its position (8), it establishes a semi-opening that provokes the deviation from part of the circulating air, which reduces the air volume at the selected intermediate level of 14,000 CFM (bright green colour mechanism for the application operation of a paint layer during the initial paint cycle).
  • valve (6) has been foreseen in this way of practical performance that has a third position (9) of total opening that reduces even more the air level at the minimum level of 1 1 ,000 CFM (bright green colour mechanism in the paint cycle).
  • the present invention has foreseen an evacuation system or exit of air from its inside, just as it is illustrated in Figure 2.
  • This system consists of ventilator ( 10) joined to an inside air opening exit of the work enclosure or painted cabin of automobile vehicles.
  • This ventilator (10) pushes the air towards the exterior across a zone in which is established a valve (1 1 ) of various butterflies, similar to the one mentioned before (6), encountering both valves functionally coordinated by some servomotors that secure them in preestablished positions.
  • This valve (1 1 ) also foresees its drive in three preestablished equivalent positions in a coordinated and synchronized way to the fittings of the valve (6).
  • One first position (12) is an absolute opening and corresponds to the completely closed position (7) of the valve (6), with the purpose of maintaining a balanced and steady pressure in the inside chamber of the oven when the volume or air tail results to be 19,000 CFM maximum.
  • a second position (13) of the valve (1 1 ) is semi-opened and would coincide with this same positioning (8) of the valve (6) from the air entrance mechanism to the oven.
  • a third position (14) of the valve (1 1 ) would practically close the oven air exit and would coincide with the minimum air flow level of 1 1 ,000 CFM determined by a smaller air entrance to the chamber due to a great part of the same being diverted by the valve (6) by situating itself in its maximum opening position (9).
  • Figuie 5 An improved form of realization, illustrated in Figuie 5, consists of the introduction of an automatic regulating system in closed loop of the inside pressure of the painted oven. This system acts on the valve ( 1 1 ), placed in the exit device or air ventilating evacuation, which has distinct butterflies that in function of the positions that the adopt permits more or less air flow evacuation across the exit vent ( 15) towards the outside.
  • This valve ( 1 1 ) is lead by a servomotor (18), whose movement is lead by the exit of a regulator (17), that in function of the measured pressure in the inside chamber, by means of a transducer (16) and in function of a command or reference pressure value, calculates the position of the blades or butterflies of the valve (1 1 ), with the purpose of regulating and maintaining the inside pressure in the chamber steady and equal to the command value, avoiding moreover pressure alterations in the inside painted cabin.
  • the exit tail should increase and therefore the opening of the valve that regulates the exit air tail of the mentioned cabin, with the purpose of avoiding the mentioned pressure alterations inside of the painted chamber, which can redound in a defective finish of the painted operations that were carried out with the mentioned cabin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Système et procédé de régulation de volume d'air dans des fours de séchage après peinture d'automobiles, prévoyant dans les dispositifs d'entrée (1) et de sortie (15) des vannes papillons (6, 11) entraînées par des servomoteurs électriques (18) pouvant adopter, toutes les vannes simultanément, trois positions préétablies (7-9, 12-14) afin de modifier le volume d'air en maintenant la pression intérieure, facilitant la réalisation dans le cycle de peinture, avant la cuisson de la peinture, de deux opérations: application de chaque revêtement de peinture à base d'eau à un débit approprié de 11 000 ou 14 000 CFM (pieds cubiques par minute) et séchage, le volume d'air étant porté pour cette opération au niveau maximum de 19 000 CFM. Une certaine économie d'énergie est obtenue du fait de la réutilisation d'une partie de l'air chauffé dans le dispositif d'entrée (1). Le dispositif, dans une version améliorée, comprend un système de commande (16-18) en boucle fermée de la pression interne qui agit sur la position de la vanne de sortie (12-14).
PCT/IB1995/001096 1995-11-16 1995-12-27 Systeme et procede de regulation de volume d'air dans les fours de sechage apres peinture d'automobiles Ceased WO1997018425A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41225/96A AU4122596A (en) 1995-11-16 1995-12-27 System and procedure for regulating air volume in ovens for painted automobiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP9502242 1995-11-16
ES9502242 1995-11-16

Publications (1)

Publication Number Publication Date
WO1997018425A1 true WO1997018425A1 (fr) 1997-05-22

Family

ID=8292181

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1995/001096 Ceased WO1997018425A1 (fr) 1995-11-16 1995-12-27 Systeme et procede de regulation de volume d'air dans les fours de sechage apres peinture d'automobiles

Country Status (2)

Country Link
AU (1) AU4122596A (fr)
WO (1) WO1997018425A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743219A (zh) * 2013-12-24 2014-04-23 烨辉（中国）科技材料有限公司 干燥钢板用热风烘干机系统
CN110296592A (zh) * 2019-06-25 2019-10-01 浙江海洋大学 一种悬挂式升流海带干燥设备
WO2020093249A1 (fr) * 2018-11-06 2020-05-14 奚金明 Four de séchage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR667613A (fr) * 1927-09-23 1929-10-18 Perfectionnements aux procédés et aux appareils de séchage des détritus et autres matière contenant de l'humidité
FR1023006A (fr) * 1949-08-09 1953-03-12 Appareil pour le conditionnement de l'air dans les locaux industriels, en particulier pour le séchage des pâtes alimentaires
US3151954A (en) * 1960-11-28 1964-10-06 Midland Ross Corp Variable velocity constant exhaust system
DE2006043B2 (fr) * 1970-02-11 1971-07-08
US3787171A (en) * 1972-06-15 1974-01-29 Hunter Eng Co Closed loop, inert atmosphere, paint line oven heat source
US4591517A (en) * 1984-06-08 1986-05-27 Overly, Inc. Web dryer with variable ventilation rate
GB2194030A (en) * 1986-08-16 1988-02-24 Monforts Gmbh & Co A Haltable textile web dryer
EP0679444A2 (fr) * 1994-04-29 1995-11-02 Belmeko Engineering Nv Appareil de traitement avec circulation d'air forcée

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR667613A (fr) * 1927-09-23 1929-10-18 Perfectionnements aux procédés et aux appareils de séchage des détritus et autres matière contenant de l'humidité
FR1023006A (fr) * 1949-08-09 1953-03-12 Appareil pour le conditionnement de l'air dans les locaux industriels, en particulier pour le séchage des pâtes alimentaires
US3151954A (en) * 1960-11-28 1964-10-06 Midland Ross Corp Variable velocity constant exhaust system
DE2006043B2 (fr) * 1970-02-11 1971-07-08
US3787171A (en) * 1972-06-15 1974-01-29 Hunter Eng Co Closed loop, inert atmosphere, paint line oven heat source
US4591517A (en) * 1984-06-08 1986-05-27 Overly, Inc. Web dryer with variable ventilation rate
GB2194030A (en) * 1986-08-16 1988-02-24 Monforts Gmbh & Co A Haltable textile web dryer
EP0679444A2 (fr) * 1994-04-29 1995-11-02 Belmeko Engineering Nv Appareil de traitement avec circulation d'air forcée

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743219A (zh) * 2013-12-24 2014-04-23 烨辉（中国）科技材料有限公司 干燥钢板用热风烘干机系统
WO2020093249A1 (fr) * 2018-11-06 2020-05-14 奚金明 Four de séchage
CN110296592A (zh) * 2019-06-25 2019-10-01 浙江海洋大学 一种悬挂式升流海带干燥设备

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Publication number Publication date
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