US3739742A - Spray assembly memory - Google Patents

Spray assembly memory Download PDF

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Publication number
US3739742A
US3739742A US00090738A US9073870A US3739742A US 3739742 A US3739742 A US 3739742A US 00090738 A US00090738 A US 00090738A US 9073870 A US9073870 A US 9073870A US 3739742 A US3739742 A US 3739742A
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spray
article
articles
indication
station
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N Racz
D Higgins
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts

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  • ABSTRACT In a spray assembly, a single spray booth is provided for spraying different coats on a given article and a memory determines which coat is to be sprayed upon the article and the presence of articles of differing configuration is indicated or sensed, whereby different coats as well as articles of differing configuration may be sprayed on the same spray assembly at the same time.
  • This invention relates to a spray assembly and, more particularly, to a spray coating assembly for spraying articles having differing characteristics.
  • Modern product finishing frequently requires the application of two or more coats of finishing or coating material to an article on a conveyorized finishing line. Frequently these coats, as well as the article or product configuration, differ from each other.
  • the application of two or more coats to a given article or product is usually accomplished by way of two complete individual coating stations and sets of equipment for drying the coatings.
  • coating is usually accomplished in either one of two ways. The different configurations are either coated in separate runs, the coating equipment being readjusted between runs to accommodate the different configurations, or a complete separate finishing line is employed for each product configuration.
  • the memory of the invention obviates the need for separate complete coating stations, equipment or finishing lines and also obviates the need for separate finishing runs with readjustment of the equipment between the runs.
  • the memory of the invention makes it possible to apply any number of different coats to a product or article using only one coating station, the article being passed through the same coating station for each coat. In the invention, the coat or coats which have previously been applied-are remembered by the memory and the coating station is directed to apply the next required coat.
  • the memory of the invention also makes it possible to coat different article configurations which are intermixed with each other on a single coating line using a single coating station.
  • articles of differing configurations may be placed'upon any given article holder without necessitating further special attention by the operator and the invention will not only sense the product or article configuration, but will also direct the coating station to use that coating method appropriate to the particular configuration as well as that method which is appropriate to the particular stage of the coating operation.
  • this embodiment of the invention not only makes it possible to use a single uniform design of carriage or conveying work holder for articles of differing configuration, but enables the operator to place an article on any one of the carriages without the need to discriminate between carriages or without the need to take any additional steps to insure that the given configuration which has been placed on the carriage is coated in a manner which is correct for that configuration.
  • the memory device of the invention is particularly useful where two or more coats of finishing material are to be applied to the article and at least one coat requires drying prior to the application of the next coat, such as for example where solvents or suspension vehicles are to be evaporated from the first or final coats prior to either applying the final coat or to bringing the article to the curing temperature of the coatings.
  • the memory device of the invention also has particular utility where more than one article configuration is to be coated with the same coating or more than one coating, such as where two differently configured coated pieces are integral but separate parts of a final assembly, for example a cookware container and its cover. In the latter instance, color matching of the two product parts is assured as they will always be coated with coatings from the same lot.
  • spray means for spraying an article as conveying means moves the articles to be sprayed past the spray means.
  • Memory means remembers at least one characteristic of the article and actuates selection means to select a predetermined one of the spray means in response to characteristic remembered to selectively spray the articles which differ in said characteristics.
  • the presence of articles of differing configuration may be automatically sensed and the articles may be sprayed selectively depending upon their configurations as well as other characteristics.
  • FIG. 1 is a schematic view of one preferred embodiment of spray assembly incorporating the principles of the invention
  • FIG. 2 is a cross sectioned elevation view of the conveyor of the assembly taken along line 2 2 of FIG. 1 and showing, in elevation, a preferred embodiment of carriage assembly and a shuttling mechanism of the invention;
  • FIG. 3 is a cross sectioned elevation view of the conveyor and carriage assembly taken along line 3 3 of FIG. 2;
  • FIG. 4 is a plan view of the conveyor and carriage assembly
  • FIG. 5 is an electrical circuit diagram of a portion of the memory of the invention and showing a suitable control circuit for selectively controlling the spray coating nozzles;
  • FIG. 6 is an electrical circuit diagram of a preferred embodiment of sensing and memory circuit of the invention.
  • FIG. 7 is a schematic view of another preferred embodiment of spray assembly incorporating the principles of the invention.
  • FIG. 8 is an electrical circuit diagram of another preferred embodiment of sensing and memory circuit of the assembly shown in FIG. 7.
  • FIGS. 1-6 One preferred embodiment of the invention is shown in FIGS. 1-6.
  • the spray assembly may be of the type employed for the coating of cookware or the like, by way of example.
  • the assembly or finishing line includes an endless conveyor, generally 10, which conveys the articles to be spray coated from a load zone, through a spray booth in which the articles are coated, through a dryer and thence to an unload zone.
  • the dryer serves the purpose of evaporating solvent. After drying and upon unloading after the final coat, the articles may be sent to a furnace for heat curing the coating if necessary.
  • the spray booth includes a plurality of spray nozzles l l, 12, 13 and 14 which are directed so as to selectively coat the articles as they pass through the spray booth on the conveyor.
  • Nozzles 11 and 12 may be employed, for example, in a first coat operation, such as a prime coat, and nozzles 13 and 14 may be employed in a second coat operation, such as a finish coat.
  • Nozzles 11 and 13 are preferably especially constructed and positioned to coat articles of one configuration and nozzles 12 and 14 to coat articles of another configuration. It will be understood that even though a single nozzle is shown for coating an article of a given configuration with a given coat, several nozzles may be employed as necessary for each coating.
  • Nozzles 11 and 12 are connected, by way of conduits 15, to a suitable prime coat supply tank 17 and nozzles 13 and 14 are connected by conduits 16 to a finish coat supply tank 18.
  • each of the nozzles includes a compressed air or other compressed gas input for the purpose of initiating flow through the nozzles and atomization of the coating liquid during spraying.
  • Each of the nozzles 11, 12, 13 and 14 is connected to a suitable compressed air source 20 by way respectively of conduits 22, 23, 24 and 25 having solenoid valves 26, 27, 28 and 29.
  • the coating supply tanks 17 and 18 may also be connected to the compressed air line for pressurization of the tanks.
  • an article rotating member 30 Positioned within the spray booth adjacent the conveyor 10, is an article rotating member 30, which may take the form of a driven V-belt 32 for engaging a portion of the carriage of the conveyor which carries the article about the conveyor loop to rotate the article during the spraying operation.
  • the carriage will be more fully described later.
  • the conveyor 10 preferably comprises an endless channel member 34 which is stationarily attached to the floor or other structure (not shown) of the building in which the spray assembly is housed and which forms a housing in which a moving endless flexible chain 36 is housed.
  • the channel member 34 includes a pair of spaced upstanding sidewalls 38 each having a flat flange 40 extending horizontally outward from their top edges, the upward facing surface of the flanges forming guide surfaces 42 upon which a plurality of carriages 44 ride.
  • the bottom portion of the channel is preferably closed by a web 46, upon which the chain 36 runs, and the top of the channel housing is open so as to form an elongated slot 48 extending around the conveyor loop.
  • the chain 36 is positioned in the housing formed by the channel 34 and preferably comprises a plurality of elongated links 50 which are pinned to each other by pins 51, such that a given link is pivotable relative to its adjacent link. At selected spaced points along the length of the endless chain 36, certain of the adjacent pivot pins 51 are replaced by elongated pins 52 and 53.
  • Pin 52 preferably comprises an enlarged diameter portion 54 and a somewhat reduced diameter distal end 55, the latter of which extends through the chain links to act as the pivot connecting pin of the links.
  • the enlarged portion of pin 52 extends upward and slightly out of the slot 48.
  • Pin 53 also includes an enlarged diameter portion 57, which extends out of the slot 48 of the channel 34 for a substantial distance, and a somewhat reduced diameter distal end 58 extends through the drive chain links to provide the pivot pin at the other end of the link.
  • the carriage 44 for holding and moving the article to be coated is positioned over pins 52 and 53 and comprises a U-shaped member having a web 60 which rests upon and slides along the guide surfaces 42 of flanges 40, and a pair of spaced upstanding side flanges 62 formed integral with the web.
  • Spacer bushings 64 extend between the chain 36 and the web 60 and attach the carriage to the chain, such that the carriage is slideably driven along the guide surfaces 42 by the moving chain and pins 52 and 53.
  • a spindle assembly 66 is provided on the carriage which includes a rotating sheave 68, fixed intermediate to the ends of an elongated rod 70, and which is adapted to engage the belt 32 while the carriage is enroute through the spray booth.
  • the lower end 71 of the rod is annular in cross section and is journaled upon the upper end of pin 53 for rotation relative thereto.
  • the other end 72 of the rod extends above the sheave -and is adapted to receive a work holding fixture (not shown) for holding the article of work which is to be coated.
  • a plurality of tubular cylinders 74, 75 and 76 are vertically spaced from each other and extend transversely across the leading end of the carriage 44 between the upstanding sides 62, each end of the tubular cylinders being fixedly attached to the sides.
  • An indication pin 78 is slideably positioned in cylinder 74 and one of the two indication pins 79 or 80 is slideably positioned in cylinder 75 or 76 respectively, depending upon which of two different article configurations are to be carried by the carriage.
  • Pin 79 is shown in FIGS. 2 and 3 as solid and pin 80 as dot and dash. If more than two configurations are to be sprayed, an additional cylinder may be added for each additional configuration.
  • the pins 78, 79 and 80 are slightly longer than the maximum width between the upstanding sides 62 such that they extend to one side or the other of the sides.
  • the memory also includes a Station No. 1 positioned between the unload zone and the load zone,.a Station No. 2 positioned between the load zone and the spray booth and a Station No. 3 positioned in the spray booth between the precoat spray nozzles 11 and 12 and the final coat nozzles 13 and 14.
  • Station No, 1 includes a shuttling mechanism 82 having a' pair of shuttling arms 83 and 84 which are attached for pivotal movement at one end by a pivot pin 85 and which are movable about their pivotal attachment by way of pneumatic or other fluid actuated cylinders 86 such that each of the arms are selectively movable toward and away from the axis of the conveyor 10.
  • the purpose of the shuttling mechanism in Station No. l, is to move pin 78, which will hereafter be referred to as the qualifying pin, such that it extends either to one side or the other of the carriage 44.
  • a lamp 88 and photocell 89 which, by way of the electrical circuit shown in FIG.
  • Station No. 2 also includes shuttling mechanism 92 also having shuttling arms 83 and 84, and a lamp 96 and photocell 97 which actuates a solenoid valve 98 in air conduit 99 to operate the shuttling arms 83 and 84 about their pivot points.
  • the shuttling arms of Station No. 2 are positioned, in elevation, slightly below shuttling arms 83 and 84 Station No. 1 and the shuttling arms 83 and 84 of Station No. 2 are positioned at the sam'e elevation as the pin cylinders 75 and 76 and their pins 79 and 80. Pin 79, if it'is present,
  • Station No. 2 also includes a limit switch LS1 which is arranged to be actuated by the qualifying pin 78 as it passes. Station No. 2 will sense the coating condition of the articles enroute to the spray booth, e.g. whether it is uncoated or prime coated, and will move one of the pins 79 and 80 outward depending upon which pin is present.
  • Station No. 3 also includes a shuttling mechanism 102 having arms 83 and 84 arranged to operate the spray pins 79 and 80 pneumatically by way of cylinders 106, solenoid valve 107 and air conduit 108.
  • Station No. 3 includes a limit switch LS2 which is arranged to be actuated also by the qualifying pin 78 as the qualifying pin passes.
  • Limit switches LS nowadays and LSFl are positioned so as to be actuated by the first configuration spray pin 79 to open one of the precoat nozzles 11 or finish coat nozzles 13 respectively, and switches LSF2 and LSF2 are positioned so as to be actuated by the second configuration spray pin to open the other of the precoat nozzles 12 and finish coat nozzles 14, respectively.
  • each of the actuating coils of the solenoid valves 26, 27, 28 and 29 of the spray nozzles 11, 12, 13 and 14 are located in a parallel lead 110, 111, 112 and 113 respectively between the main conductors 114, 114' of a power source.
  • Each of these leads also includes a timer 116, 117, 118 and 119 respectively for timing the length of operation of the nozzles and also includes one of the limit switches LSPl, LSF2, LSFl and LSF2 respectively.
  • Limit switches LSPl and LSFl are selectively actuated by spray pin 79 when it is positioned in its cylinder 75 and limit switches LSF2 and LSF2 are selectively actuated by spray pin 80, if present, from their normally open position to a closed position so as to complete a circuit through the leads 110, 111, 112 and 113 depending upon the position of the qualifying pin 78.
  • Additional leads 120 may be provided between the main conductors 114, 114' for operating the timer 116, 117, 118 and 119 where the timers are electrical.
  • the sensing and memory circuit of Station No. 2 includes a first lead 122 which extends between the main conductors 124, 124' of the power supply.
  • the normally closed limit switch LS1 is positioned in lead 122 along with the coil of a switching relay 126.
  • the switching contacts of relay 126 are preferably of the instant open-delay close type.
  • a second lead 128 includes the normally closed switching contacts of the relay 126, the photocell 97 and the actuating coil of solenoid valve 98.
  • the lamp may be connected in parallel across the switching contacts of relay 126, the cell 97 and the coil of valve 98.
  • Station No. 3 includes another lead 130 connected across conductors 124, 124'. Positioned in lead 130 are normally open limit switch LS2 and the coil of another switching relay 132 which has normally open switching contacts. Relay 132 is preferably of the instant closedelay open type. The switching contacts of the switching relay 132 are positioned in lead 134 which includes the actuating coil of solenoid valve 107.
  • Station No. ls photocell 89 is positioned in lead 136 between conductors 124, 124' along with the actuating coil of solenoid valve 90.
  • the lamp 88 may be connected in parallel to the cell 89 and coil of valve 90 to receive continuous power.
  • an article will be positioned upon the work holder of the carriage 44. If the carriage has a pin 79 but does not have a pin 80, an article of one configuration A, for example a cookware container cover, will be placed on the carriage and if the other pin 80 is present and pin 79 is absent, an article of the other configuration B, for example the container itself, is placed on the carriage.
  • A for example a cookware container cover
  • the outward extending spray pin 79 and 80 will actuate either limit switch LSPl or LSF2, respectively depending upon which pin is present. Actuation of one of these switches will complete a circuit through the actuating coil of either solenoid valve 26 or 27 to admit air to spray nozzle 11 or 12 to spray the article of a given configuration for a predetermined amount of time depending on the setting of the timer 116 or 117.
  • the sheave 68 comes into contact with the moving drive belt 32 so as to rotate the work holder and the article which is being sprayed to insure a uniform application of coating material from nozzle 11 or 12.
  • shuttling mechanism 82 admitting air to the shuttling mechanism 82 and shifting the shuttling arms 83 and 84 from the solid line position to the dot and dash line position shown in FIG. 6. Now the arms are positioned such that arm 84 will urge the qualifying pin 78 into its outer position as shown in the dot and dash lines in FIG. 2. Again, when the article leaves the light beam, the shuttling arms 83 and 84 will be returned to their normal solid line position in anticipation of the next following carriage.
  • Arm 84 thereby now positions the spray pin 79 or 80, whichever is present, in the outward position and as the carriage leaves Station No. 3, the outward positioned spray pin 79 or 80 will close limit switch LSFl or LSF2, depending upon which pin is present, to actuate the final coat spray nozzle 13 or 14 for a period of time determined by the timer 118 or 119.
  • the article then leaves the spray booth for a second time and passes through the dryer, where any solvent in the final coat is evaporated, and thence to the unload zone where the finally coated article is unloaded.
  • the article may be sent to a curing furnace if necessary for the curing of its coating or coatings.
  • shuttling arms 83 and 84 of shuttling mechanism 92 therefore will remain in their solid line position as shown in FIG. 6 and will return the spray pin 79 or 80 to its inward position. With both the spray pin 79 or 80 and the qualifying pin 78 in the inward position, none of the limit switches in the spray booth will be actuated as the empty carriage passes the respective switches.
  • pins 79 or 80 are carried on a given carriage and the presence of one pin and absence of the other provides an indication of the identity of the particular configuration of the article on the given carriage.
  • both pins 79 and 80 are carried at all times on any given carriage and either configuration of article may be placed on any given carriage, as the particular configuration of the article on the carriage will be automatically sensed.
  • FIG. 7 The construction of the second preferred embodiment of assembly is shown in FIG. 7 and is identical to that of the assembly shown in FIG. 1, except for Station Nos. 2 and 3 and the presence of both indication pins 79 and 80 on any given carriage at the same time. Accordingly, like reference numerals will be employed with like components.
  • Station No. l is of the same construction as previously described. Included in Station No. 1 is a lamp '88 and photocell 89 which, by way of the electrical circuit shown in FIG. 8 which will be described later, operates a solenoid valve 90 in air conduit 91 to selectively admit air to one or the other of the shuttling mechanisms cylinders 86 for pivoting the arms 83 and 84 in response to the presence or absence of any article in the carriage, whatever its configuration may be.
  • Station No. 2 includes a pair of shuttling mechanisms 140 and 142 having shuttling arms 83 and 84.
  • Station No. 2 also includes an array 144 of photo lamps and cells having a pair of lamps 146 and 147 and photocells 148 and Y149 which control solenoid valves 150 and 151 in air conduit 152 to selectively operate the shuttling arms 83 and 84 of the respective shuttling mechanisms 140 and 142.
  • the shuttling arms of the mechanisms 140 and 142 in Station No. 2 are positioned, inielevation, slightly below shuttling arms 83 and 84 in the shuttling mechanism 82 in Station No. l.
  • shuttling arms of mechanism 140 are positioned at the same elevation as the pin cylinder 75 and its pin 79 and the arms of mechanism 142 are positioned at the same elevation as cylinder 76 and its pin 80.
  • the shuttling mechanisms 140 and 142 control the inward and outward positioning of the configuration A and B spray pins 79 and 80, respectively, as will be described in more detail later.
  • Station No.2 also includes the normally closed limit switch LS1 which is arranged to be actuated by the qualifying pin 78 as it passes Station No. 2 will sense both the coating condition hr the articles enroute to the spray booth, e.g. whetherfa given article is uncoated or prime coated, and will also sense the configuration of the article, eJg. whether a container or a cover is present on the carriage, and will selectively control the inward and outward position of one of the pins 79 or 80 depending upon which configuration is present.
  • the coating condition hr the articles enroute to the spray booth
  • the configuration of the article eJg. whether a container or a cover is present on the carriage
  • Station No. 3 also includes a pair of shuttling mechanisms 154 and 156 also having arms 83 and 84. Mechanisms 154 and 156 also operate the spray pins 79 and respectively by way of solenoid valves 158 and 159 and air conduit 160.
  • Station No. 3 includes the limit switch LS2 which is arranged to be actuated also by the qualifying pin 78 as the qualifying pin passes and a single lamp 162 and photocell 163 for determining what configuration of article is on the carrier.
  • the spray circuit shown in FIG. 5 is employed in this embodiment with its limit switches LSP1, LSP2, LSFl and LSF2 for spraying the article sensed with prime and finish coats.
  • the sensing and memory circuit of Station No. 2 includes a first lead 122 which extends between the main conductors 124, 124 of the power supply and in which the normally closed limit switch LS1 is positioned in lead 122 along with the coil of a switching relay 126.
  • a second lead 164 is connected between conductors 124, 124 and includes, in order, the normally closed switching contacts of the relay 126, a tap to another lead 166, the normally closed switching contacts of another relay 168, the photocell 148 and the actuating coil of solenoid valve 150.
  • Lead 166 is tapped between conductor 124' to lead 164 between the normally closed switches of relays 126 and 168 and includes, in order, photocell 149, a tap to lead 170 for energizing the coil of relay 168, and the actuating coil of solenoid valve 151. In order to provide continuous power to the lamps 146 and 147, these lamps may be connected between conductors 124, 124 by leads 17-1 and 172.
  • Station No. 3 also includes lead 130 connected across conductors 124, 124' in which normally open limit switch LS2 and the coil of switching relay 132, having normally open switching contacts are positioned.
  • Station No. 3 also includes another lead 174 which is connected between the conductors 124, 124 and which includes, in order, the switching contacts of relay 132, a tap to a lead 176, the normally closed switching contacts of another relay 178, and the actuating coil of solenoid valve 158.
  • Lead 176 is tapped between conductor 124 to lead 174 between the switching contacts of relays 132 and 178 and includes, in order, photocell 163, a tap to a lead 180 for energizing the-coil of relay 178, and the actuating coil of solenoid valve 159.
  • Lamp 162 may be connected for energization between conductors 124, 124' by lead 182.
  • Station No. 1 is the same as described in FIG. 6.
  • the configuration A article Since the configuration A article is a cover, it will block the light from only one of the lamps due to the positioning of the lamps and cells in the array 144, whereas an article of configuration B will block both of the beams. If the article is a cover of configuration A, the beam will be interrupted to actuate the photocell 148 and complete the circuit through the already closed switching contacts of relays 126 and 168 and the actuating coil of the solenoid valve 150. The valve 150 will now admit air to the cylinders of the shuttling mechanism 140 to shift the arms 83 and 84 to the dot and dash position as shown in FIG. 8.
  • the article which was positioned on the carrier was a cookware container itself of configuration B, it would move into both of the light beams in Station No. 2, interrupting the beams. Where both beams are interrupted, the photocell 149 completes a circuit through lead 166 to the coil of solenoid 151 to open that valve and shift the arms 83 and 84 of mechanism 142 from the solid position to the dot and dash position shown in FIG. 8. In the latter position, these arms will move the configuration B spray pin 80 to its outward position.
  • solenoid valve 150 will remain deenergized, since energization of lead 166 will also energize lead 170 and the coil of relay 168 to open the switching contacts of that relay which are positioned in lead 164. Thus, valve 150 will remain closed and pin 79 will remain in its inward position.
  • the outward extending spray pin 79 or 80 will actuate either limit switch LSPl or LSP2, respectively, depending upon which pin was positioned outward in Station No. 2. If the article on the carrier is a configuration A cover, the configuration A spray pin 79 will be in the outward position and will actuate switch LSPl and a first coat will be sprayed on the article from nozzle 11 as previously described. If on the other hand, the article on the carrier is a configuration B container, the configuration B spray pin will be in the outward position and switch LSP2, rather than LSPl, will be actuated and nozzle 12 will spray the article as previously described. v
  • limit switch LS2 remains open, deenergizing the coil of switching relay 132 and its switching contacts remain open as shown in FIG. 8 to deenergize the actuating coil of solenoid valves 158 and 159. Even though the article may trigger photocell 163, lead 176 and its valve 159 actuating coil remain deenergized due to the open switching contacts of relay 132. With valves 158 and 159 closed, the shuttling arms 83 and 84 of the shuttling mechanisms 154 and 156 will remain in the solid line position as shown in FIG.
  • the prime coated article will now leave the spray booth and pass through the dryer where solvent or the like in the first coat will be evaporated, and will continue through the unload zone and enter Station No. 1. At this point the qualifying pin 78 and both of the spray pins 79 and 80 will still be in their inward positions. Since the carriage 44 is now loaded with an article, the light beam in Station No. 1 will be broken, whether the article is of configuration A or B, to complete a circuit through the actuating coil of the solenoid valve 90, admitting air to the shuttling mechanism 82 and shifting the shuttling arms 83 and 84 from the solid line position to the dot and dash line position shown in FIG. 8.
  • valve 158 will admit air to the shuttling mechanism 154, shifting its shuttling arms 83 and 84 from the solid line position shown in FIG. 8 to the dot and dash position. Arm 84 thereby will now position the configuration A spray pin 79 in the outward position and, as the carriage leaves Station No. 3, the outward positioned spray pin 79 will close limit switch LSFl to actuate the final coat spray nozzle 13 as previously described.
  • the article on the carriage is a container of configuration B, it will interrupt the light beam to photocell 163 and complete a circuit through the already closed switching contacts of relay 132, through lead 176 and through the coil of solenoid valve 159, opening the valve. Since lead 176 is now energized, lead 180 and the coil of relay 178 will also be energized to open its switching contacts in lead 174 and deenergize the coil of solenoid valve 158. The opening of valve 159 will admit air to the shuttling mechanism 156, shifting its arms 83 and 84 from the solid line position shown in Fig. 8 to the dot and dash line position.
  • Arm 84 of the mechanism 156 thereby will now position the configuration B spray pin 80 in the outward position'and, as the carriage leaves Station No. 3, the outward positioned pin 80 will close limit switch LSFZ to actuatethe final coat spray nozzle 14 as previously described.
  • the article then leaves the spray booth for a second time and passes through the dryer, where any solvent in thefinal coat is evaporated, and thence to the unload zone where the finally coated article is unloaded.
  • shuttling mechanism 140 and 142 therefore will remain in their solid line positions as shown in FIG. 8 and will return the spray pin 79 or 80 to its inward position. With both the spray pin 79 or and the qualifying pin 78 in the inward position, none of the limit switches in the spray booth will be actuated as the empty carriage passes the respective switches.
  • pins 78, 79 and 80 have been described in terms of the pins performing certain functions when positioned inward and certain functions when positioned outward, these positions may be reversed if accompanied by the reversal of various ones of the limit switches and shuttling mechanisms.
  • solid state components may be employed in the circuitry of the invention and that other article presence or absence sensing devices may be employed in the place of the photocells, such as limit switches and the like, although photocells are preferred.
  • conveyor means for conveying the articles to be sprayed by said spray means
  • memory means including means on said conveyor means movable both with and relative to said articles as the articles are conveyed by the conveyor means, said 'memory means remembering at least one characteristic of the articles which are being conveyed to said spray means, and
  • selection means actuated by said memory means for selecting a predetermined one of said spray means in response to the characteristic remembered by said memory means, whereby articles differing in said characteristic are selectively sprayed.
  • said characteristic includes at least one of the coating condition and configuration of the article.
  • said memory means comprises,
  • first and second indication means movable with the article and also relative to the conveyor means as 4.
  • said station includes article presence sensing means responsive to the absence of an article in said station to position said second indication means in said first position, whereby said spray initiating means is not actuated by said second indication means.
  • said memory means comprises,
  • first, second and third shuttling means in each of said stations respectively for moving said indication means between first and second positions relative to the conveyor means, said first shuttling means moving said first indication means to a first position in response to the absence of an article and to a second position in response to the presence of an article in said first station,
  • said second shuttling means moving said second indication means to a second position in response to the presence of an article in said second station when said first indication means is in said first position and to a first position in response to the presence of an article when said first indication means is in said second position
  • said third shuttling means moving said second indication means to said first position in response to said first indication means being in said first position and to said second position in response to said first indication means being in second position
  • first and second spray initiating means before and after said third station which are actuated in response to said second indication means when the means is in said second position to initiate spray of said spray means.
  • said first and second indication means comprise a pair of axially movable elongated pins.
  • each of said shuttling means of said first and second stations include photoelectric means for sensing the presence and absence of an article in said stations, and the shuttling means of said second and third stations include switching means which are actuated by said first indication means when said first indication means is in said second position.
  • said conveyor means includes a carriage for holding and moving the article to be sprayed
  • said first and second indication means comprise elongated pins movably mounted on said carriage for axial movement between their said first and second positions.
  • a spray assembly having a conveyor for moving articles to be sprayed by spray means and a carriage associated with said conveyor for holding the articles, wherein the improvement comprises:
  • shuttling means actuating said shuttling means to move one of said pins to said first position in the absence of an article in said first station and to said second position in the presence of an article in said station,
  • shuttling means having shuttling means, pin sensing means and article presence sensing means, both said pin sensing means and said presence sensing means actuating said shuttling means to move the other pin to said first position when either said one pin is in said second position or in the absence of an article in said station and to move the other pin to said second position when an article is present in said station and said one pin is in said first posi tion,
  • a third station having shuttling means and pin sensing means, said pin sensing means actuating said shuttling means to position said other pin in said first position when said one pin is in said first position and to position said other pin in said second position when said one pin is in said second position, and
  • first and second spray initiating means before and after said third station respectively and responsive to said other pin being in said second position to initiate spray means before and after said third station respectively.
  • said first station is located on the conveyor after said spray means, said second station is located on the conveyor before said spray means, and said third station is be tween said first and second spray initiating means.
  • said spray means comprise both first and second coat spray nozzles and all of said nozzles are located in a single spray booth.
  • the article presence sensing means of said second station including configuration sensing means which discriminates between articles of differing configuration, said configuration sensing means actuating said second station shuttling means to selectively move either said other pin or said third pin to said first or second positions in response to the configuration of the article,
  • said third station including configuration sensing means which discriminates between articles of differing configuration, said third station configuration sensing means actuating said third station shuttling means to position said other pin and said third pin in said first position when said one pin is in said first position and to selectively position either said other pin or said third pin in said second position when said one pin is in said second position and in response to the configuration of the article.
  • a spray assembly for spraying articles which may continuously differ in configuration and in coating condition from each other, comprising;
  • conveyor means for continuously conveying the articles of differing configuration and coating condition to said spray means
  • sensing means for automatically discriminating between articles of more than one of the differing configurations, 1 first and second movable indication means on said conveyor means and movable both with and relative to said articles, as the articles are conveyed by the conveyor means, said indication means being moved relative'to said articles in response to said sensing means to indicate a first and second of said configurations of each said article, and
  • selection means actuated by said memory means and 1 said first and second indication means for selecting a predetermined one of said spray means in response to the coating condition remembered by said memory means and the configuration indicated by said indication means, whereby the articles are selectively sprayed in response to their coating condition and configuration.
  • said conveyor means includes a plurality of article carriages each of which carries one of the articles to said spray means
  • said memory means includes afirst pin
  • said indication means include second and third pins movably mounted on each of said carriages, and pin positioning meansfor positioning said first pin in first or second positions which are indicative of differing coating conditions respectively of the article on its carriage and for positioning said second and third pins in first or second positions which are indicative of differing configurations, of the article on its carriage.
  • spray means for spraying articles
  • conveyor means for conveying the articles to be sprayed by said spray means
  • memory means for remembering at least one characteristic of the articles which are being conveyed to said spray means
  • said memory means comprising first and second indication means movable withthe article and also relative to the conveyor means as the article is conveyed by said conveyor means, and a station on said conveyor means before the spray means including altering means responsive to the first indication means when said first indication means is positioned in a first position, for moving said second indication means from a first to a second position, and
  • selection means actuated by said memory means for selecting a predetermined one of said spray means in response to the characteristic remembered by said memory means, said selection means including spray initiating means between said station and said spray means which is actuated by said second indication means when said second indication means is in said second position to initiate spray of said predetermined one of said spray means, whereby articles differing in said'characteristic are selectively sprayed.
  • said station includes article presence sensing means responsive to the absence of an article in said station to position said second indication means in said first position, whereby said spray initiating means is not actuated by said second indication means.
  • conveyor means for conveying the articles to be sprayed by said spray means
  • memory means for remembering at least one characteristic of the articles which are being conveyed to said spray means, said memory means comprising first, second and third stations on said conveyor means before, adjacent and after said spray means respectively,
  • first and second indication means movable with the 1 article and also relative to the conveyor means as the article is conveyed by said conveyor means
  • first, second and third shuttling means in each of said stations respectively for moving said indication means between first and second positions relative to the conveyor means
  • said first shuttling means moving said first indication means to a first position in response to the absence of an article and to a second position in response to the presence of an article in said first station
  • said second shuttling means moving said second indication means to a second position in response to the presence of an article in said second station when said first indication means is in said first position and to a first position in response to the presence of an article whensaid first indication means is in said second position
  • said third shuttling means 'moving said second indication means to said first position in response to said first indication means being in said first position and to said second position in response to said first indication means being in second position, and
  • first and second spray initiating means before and after said third station which are actuated in response to said second indication means when the means is in said second position to initiate spray of said spray means
  • selection means actuated by said memory means for selecting a predetermined one of said spray means in response to the characteristic remembered by said memory means, whereby articles differing in said characteristic are selectively sprayed.
  • said first and second indication means comprise a pair of axially movable elongated pins.
  • each of said shuttling means of said first and second stations include photoelectric means for sensing the presence and absence of an article in said stations, and the shut-' 4 tling means of said second and third stations include switching means which are actuated by said first indication means when said first indication means is in said second position.
  • said conveyor means includes a carriage for holding and moving the article to be sprayed
  • said first and second indication means comprise elongated pins movably mounted on said carriage for axial movement between their first and second positions.
  • conveyor means for continuously conveying the articles of differing configuration and coating condition to said spray means, said conveyor means including a plurality of article carriages each of which carries one of the articles to said spray means,
  • said memory means for remembering more than one of the differing coating conditions of the articles being conveyed to said spray means, said memory means including a first pin movably mounted on each of said carriages,
  • sensing means for automatically discriminating between articles of more than one of the differing configurations
  • first and second movable indication means operable in response to said sensing means to indicate a first and second of said configurations of each said article, said first and second indication means including second and third pins movably mounted on each of said carriages,
  • pin positioning means for positioning said first pin in first or second positions which are indicative of differing coating conditions respectively of the article on its carriage and for positioning said second and third pins in first or second positions which are indicative of differing configurations of the article on its carriage, and
  • selection means actuated by said memory means and said first and second indication means for selecting a predetermined one of said spray means in response to the coating condition remembered by said memory means and the configuration indicated by said indication means, whereby the articles are selectively sprayed in response to their coating condition and configuration.

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  • Spray Control Apparatus (AREA)
US00090738A 1970-03-30 1970-11-18 Spray assembly memory Expired - Lifetime US3739742A (en)

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Application Number Priority Date Filing Date Title
US00090738A US3739742A (en) 1970-03-30 1970-11-18 Spray assembly memory
FR7110997A FR2087913A5 (enExample) 1970-03-30 1971-03-29

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2389070A 1970-03-30 1970-03-30
US00090738A US3739742A (en) 1970-03-30 1970-11-18 Spray assembly memory

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US3739742A true US3739742A (en) 1973-06-19

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991710A (en) * 1973-06-01 1976-11-16 Energy Innovations, Inc. Electrogasdynamic production line coating system
US3996568A (en) * 1973-05-14 1976-12-07 Schering Aktiengesellschaft Arrangement for processing information on goods in process in an automatic electroplating plant
US4421800A (en) * 1982-02-02 1983-12-20 Digitronics Inventionering Corp. Spraying apparatus
US4614300A (en) * 1982-04-19 1986-09-30 E. I. Du Pont De Nemours And Company Computerized spray machine
US5559708A (en) * 1990-10-15 1996-09-24 Aluminum Company Of America Computer controlled flexible manufacturing of aluminum articles
US5905651A (en) * 1997-01-16 1999-05-18 Nordson Corporation Parts identification system for powder spray coating system
CN114904732A (zh) * 2017-11-30 2022-08-16 艾仕得涂料系统有限责任公司 利用高转移效率施涂器施加涂料组合物的系统、涂层和相应的方法
US12122932B2 (en) 2020-05-29 2024-10-22 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US12539525B2 (en) 2022-12-15 2026-02-03 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof

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US2754795A (en) * 1955-03-28 1956-07-17 Enssle Bruno Eugen Machine for spraying objects of irregular outline
US2781738A (en) * 1954-09-08 1957-02-19 Cline Electric Mfg Co Spray coating apparatus
US2961990A (en) * 1957-10-04 1960-11-29 Allen Bradley Co Apparatus for the automatic spraying of coatings on objects
US3192796A (en) * 1960-02-12 1965-07-06 Vilbiss Co Memory system for spray coating machines or the like
US3356061A (en) * 1965-03-11 1967-12-05 Gyromat Corp Paint spray control system
US3444839A (en) * 1965-12-27 1969-05-20 Ibm Automatic spray painting machine
US3491718A (en) * 1968-07-12 1970-01-27 Ebbert Eng Co System for controlling sequential operations
US3593308A (en) * 1968-10-30 1971-07-13 Amtron Paint spray control system

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Publication number Priority date Publication date Assignee Title
US2781738A (en) * 1954-09-08 1957-02-19 Cline Electric Mfg Co Spray coating apparatus
US2754795A (en) * 1955-03-28 1956-07-17 Enssle Bruno Eugen Machine for spraying objects of irregular outline
US2961990A (en) * 1957-10-04 1960-11-29 Allen Bradley Co Apparatus for the automatic spraying of coatings on objects
US3192796A (en) * 1960-02-12 1965-07-06 Vilbiss Co Memory system for spray coating machines or the like
US3356061A (en) * 1965-03-11 1967-12-05 Gyromat Corp Paint spray control system
US3444839A (en) * 1965-12-27 1969-05-20 Ibm Automatic spray painting machine
US3491718A (en) * 1968-07-12 1970-01-27 Ebbert Eng Co System for controlling sequential operations
US3593308A (en) * 1968-10-30 1971-07-13 Amtron Paint spray control system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996568A (en) * 1973-05-14 1976-12-07 Schering Aktiengesellschaft Arrangement for processing information on goods in process in an automatic electroplating plant
US3991710A (en) * 1973-06-01 1976-11-16 Energy Innovations, Inc. Electrogasdynamic production line coating system
US4421800A (en) * 1982-02-02 1983-12-20 Digitronics Inventionering Corp. Spraying apparatus
US4614300A (en) * 1982-04-19 1986-09-30 E. I. Du Pont De Nemours And Company Computerized spray machine
US5559708A (en) * 1990-10-15 1996-09-24 Aluminum Company Of America Computer controlled flexible manufacturing of aluminum articles
US5905651A (en) * 1997-01-16 1999-05-18 Nordson Corporation Parts identification system for powder spray coating system
US11649371B2 (en) 2017-11-30 2023-05-16 Axalta Coating Systems Ip Co., Llc Method of forming a coating composition for application to a substrate utilizing a high transfer efficiency applicator
CN114904732B (zh) * 2017-11-30 2023-08-08 艾仕得涂料系统有限责任公司 利用高转移效率施涂器施加涂料组合物的系统、涂层和相应的方法
US11649374B2 (en) 2017-11-30 2023-05-16 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11649372B2 (en) 2017-11-30 2023-05-16 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
CN114904732A (zh) * 2017-11-30 2022-08-16 艾仕得涂料系统有限责任公司 利用高转移效率施涂器施加涂料组合物的系统、涂层和相应的方法
US11649373B2 (en) 2017-11-30 2023-05-16 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11655391B2 (en) 2017-11-30 2023-05-23 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11613669B2 (en) 2017-11-30 2023-03-28 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11820910B2 (en) 2017-11-30 2023-11-21 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11840639B2 (en) 2017-11-30 2023-12-12 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11945964B2 (en) 2017-11-30 2024-04-02 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US11965107B2 (en) 2017-11-30 2024-04-23 Axalta Coating Systems Ip Co., Llc System for applying a coating composition
US12054634B2 (en) 2017-11-30 2024-08-06 Axalta Coating Systems Ip Co., Llc Method of applying a coating composition to a substrate
US12122932B2 (en) 2020-05-29 2024-10-22 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof
US12539525B2 (en) 2022-12-15 2026-02-03 Axalta Coating Systems Ip Co., Llc Coating compositions for application utilizing a high transfer efficiency applicator and methods and systems thereof

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