CA1232752A - Fluid flow system for paint spray guns - Google Patents
Fluid flow system for paint spray gunsInfo
- Publication number
- CA1232752A CA1232752A CA000471060A CA471060A CA1232752A CA 1232752 A CA1232752 A CA 1232752A CA 000471060 A CA000471060 A CA 000471060A CA 471060 A CA471060 A CA 471060A CA 1232752 A CA1232752 A CA 1232752A
- Authority
- CA
- Canada
- Prior art keywords
- paint
- motor
- valve
- motor speed
- spraying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0688—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by combined action on throttling means and flow sources
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Nozzles (AREA)
Abstract
TITLE
Fluid Flow System For Paint Spray Guns ABSTRACT
A fluid flow control device for a spray gun which feeds paint to the spray gun at an exact flow rate; the components of this device are a two position valve which permits paint flow to the spray gun when the gun is activated and recycles paint back to a paint reservoir, a valve operator means which activates the valve, a gear pump which pumps paint at an exact flow rate to the spray gun, a motor speed controller attached to the gear pump with a feed back circuit to monitor motor speed and an input means such as manual keyboard with a computer or a computer which feeds flow data to the motor speed controller. The device is useful for controlling the flow of paint to spray robots used on automotive and truck manufacturing lines an automatic spray machines which are computer controlled.
Fluid Flow System For Paint Spray Guns ABSTRACT
A fluid flow control device for a spray gun which feeds paint to the spray gun at an exact flow rate; the components of this device are a two position valve which permits paint flow to the spray gun when the gun is activated and recycles paint back to a paint reservoir, a valve operator means which activates the valve, a gear pump which pumps paint at an exact flow rate to the spray gun, a motor speed controller attached to the gear pump with a feed back circuit to monitor motor speed and an input means such as manual keyboard with a computer or a computer which feeds flow data to the motor speed controller. The device is useful for controlling the flow of paint to spray robots used on automotive and truck manufacturing lines an automatic spray machines which are computer controlled.
Description
~23~7~;Z
TITLE
Fluid Flow System For Paint spray Gun BACKGROUND OF THE INVENTION
hi invention Rowley to a fluid flow control devils and in particular to a f lurid f low control device for paint spray guns.
In current paint spraying ~y6tems, a spray - gun it tu~ularly attached to a container with paint that is pressurized by air. During spraying of an object paint under air prowar it fed to the fipray " gun. This system ha a number of problem. The f low rate of paint fed to the spray gun it difficult to control accurately, the 6y6tem it slow to respond to change in slow rate and the system it operator dependent, i.e. minor adju6tment6 are jade by an operator until desired flow rate it obtained. In zany modern paint application line, computer controlled robots are used to spray paint. The paint flow rate Utah be set accurately before painting turret and the flow rate mutt continue at an accurate flow rate during the spraying operation because the robot owe not eye change in appearance of the paint coating being applied and Anita make adjustment to compensate for change as would a human operator.
Allah, automatic spray machine which are programmed to spray panel that are used for color ctandard6 require the application of an excel amount of a paint coating to each panel and hence, paint flow rate on spray application mutt be accurate and mutt be controlled.
he novel device of hi invention when used with conventional paint spraying equipment provides accurate and controlled delivery of paint to spray Hun.
I' ~L23Z'75~
SUMMARY OF THE INVENTION
A fluid flow control device used with a fluid spraying 6y~tem having a spraying device which when activated spray fluid on a work piece, having an atomizing air supply connected to the spraying device and a fluid reservoir tabularly connected to the spraying device; wherein the fluid flow control device compare (1) a two position valve that it tabularly connected to the spraying device and to the fluid reservoir, bald valve having a fruit position that allows fluid to flow from the fluid reservoir Jo the spraying device and a second position that allows recycling of fluid to the fluid reservoir;
TITLE
Fluid Flow System For Paint spray Gun BACKGROUND OF THE INVENTION
hi invention Rowley to a fluid flow control devils and in particular to a f lurid f low control device for paint spray guns.
In current paint spraying ~y6tems, a spray - gun it tu~ularly attached to a container with paint that is pressurized by air. During spraying of an object paint under air prowar it fed to the fipray " gun. This system ha a number of problem. The f low rate of paint fed to the spray gun it difficult to control accurately, the 6y6tem it slow to respond to change in slow rate and the system it operator dependent, i.e. minor adju6tment6 are jade by an operator until desired flow rate it obtained. In zany modern paint application line, computer controlled robots are used to spray paint. The paint flow rate Utah be set accurately before painting turret and the flow rate mutt continue at an accurate flow rate during the spraying operation because the robot owe not eye change in appearance of the paint coating being applied and Anita make adjustment to compensate for change as would a human operator.
Allah, automatic spray machine which are programmed to spray panel that are used for color ctandard6 require the application of an excel amount of a paint coating to each panel and hence, paint flow rate on spray application mutt be accurate and mutt be controlled.
he novel device of hi invention when used with conventional paint spraying equipment provides accurate and controlled delivery of paint to spray Hun.
I' ~L23Z'75~
SUMMARY OF THE INVENTION
A fluid flow control device used with a fluid spraying 6y~tem having a spraying device which when activated spray fluid on a work piece, having an atomizing air supply connected to the spraying device and a fluid reservoir tabularly connected to the spraying device; wherein the fluid flow control device compare (1) a two position valve that it tabularly connected to the spraying device and to the fluid reservoir, bald valve having a fruit position that allows fluid to flow from the fluid reservoir Jo the spraying device and a second position that allows recycling of fluid to the fluid reservoir;
(2) a valve operator jeans coupled to the valve and to the spraying device which whey the spraying device it activated to spray fluid ova the valve to the first position:
I a gear pump tabularly attached Jo the valve and to the fluid reservoir which meter fluid to the straying device through the valve at an exact flow rate;
(4) a variable speed o'er connected to the gear jump:
(5) a motor speed controller electrically connected to the motor with an electrical signal fed back prom the rotor to the controller to monitor the motor and maintain the motor at continue speed; and ~23275~
(C) an input mean electrically connected to the motor speed controller for providing motor speed data to the controller:
wherein motor speed data which it directly related to fluid flow rate it fed through the input mean to the motor speed controller which activate and control the variable speed motor that drive the gear pump and Anton the motor at a constant speed to provide an exact flow rate of fluid to the spraying device when the spraying device it activated and the valve it in the fir t pun.
RIFE DESCRIPTION OF THE DRAWING
The figure show a schematic diagram of the fluid flow control device of this invention used in conjunction with a spray gun.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
he fluid flow control device it generally used in conjunction with application ox paints. The device can be used in an automatic spray machine in which an exact amount of paint mutt be applied to a panel which it used for a color standard for paint manufacturing or paint dolor testing. Alto, the device can be used with paint spraying robot which are used on automobile and truck manufacturing line. A human operator it not prevent to aye minor ad3u~t~ents during spraying and therefore, toe flow raze of the paint being applied must be accurately controlled. If too much paint it applied the reloan coating run and ago if zoo little it applied, toe coverage will nut be surf f iciest resulting in a poor appearance of the resulting finish.
In reference to the FIG, paint 1 it pored in a container 2 and it wept mixed wit paint ~327~
stirrer 3. A gear pump 4 pump the pain from toe container 2 through tube to ye spray gun 5 trough two pun valve 6 or Russell paint back to the container 2 depending on the petunia of the valve 6. A shown in the FIG., toe valve 6 it in it second position and paint I being recycled through a tube back Jo the container 2. The arrow adjacent to the tube indicate dlrectiDn of paint flow.
when the spray gun 5, typically a DeVilbis6*
AGB541, it engaged compared air it fed into toe gun to atomize the paint for spraying. A signal engage gun 5 and activate valve operator 7 which move the valve 6 to to fir t position that allow paint to flow to the spray gun 5. The dotted line from the gun 5 illu6tcate paint being sprayed.
Preferably, toe valve 6 it a two position ball valve and the valve operator 7 connected to the valve it an air operated double acting put which it drive by ~ompre66ed air. Preferably, the ball valve an the double acting piston valve operator 7 are coupled together in one unit. One preferred unit it jade by iota Company, Highland Height, Ohio and is a DOW 180 Double acting valve No.
SS-45~SB-153DA-LSK-153.
US Toe pump 4, typically a Zenith pup jade by Zenith Predate Company it a precision rotary gear ~eterlng pump that provide an accurate flow rate of paint of about 300-700 cc/min. Zenith pumps Rich pump a a flow rate of about 0.16-50 cc/revolution can I be used. These pump are equipped with reducing gear amiably to provide a fixed gear ratio to drive the pump iota variable speed motor 8. A magnetic pickup monitoring a gear can be used to provide digital pulse feed back to the rotor speed controller I.
* denotes trade mark issue The o'er 8 used to drive the pump 4 typically it a DO motor of 1/2 HP (horsepower) with a variable speed of 90-1800 rum. DO outwore of 1/4-1 HP can be used with appropriate change it gearing to drive the pump.
A rotor speed controller 9 electrically attacked to toe motor 8 and eta the speed of the rotor and through a digital closed circuit feed back loop ~onitor6 and adjust the actual speed of the rotor. As mentioned above, one of the query can be monitored Vito magnetic pickup to err rotor speed. Typically, a Zenith TYPE QM-1412 rotor speed controller is used. The speed of the motor can be set manually by jetting command switches or can be fed to the speed controller through tube speed control input 10.
The speed control input 10 can be a manual keyboard, typically RCA*VP 611 which Jay Dave a display Ann, typically an IEE*Corp 8822-95-080, both of which are controlled by a computer described below. Allah. a digital computer can be used a the speed control input. Standard calculation are used to convert fluid flow of paint to motor speed taxing into consideration all parameter of the system.
Table or chart can be established providing the relationship of fluid flow to rotor speed.
A digital computer cub as an Intel SAC
Bolos Micro-computer. ~ational*se~iconductor BLOC 8014 microcomputer or an Intel SAC 8020 Microcomputer can be used in the speed control input. One advantage of a computer or microprocessor it that the input data can be directly used a fluid flow and data will be prosody and converted to rotor speed Ed fed to the controller 9.
* denotes trade mark ~32~5~
The fluid flow control device has many advantage over the conventional stem which use an air pre~6urized paint containing vessel to control paint flow. These air pre6~urized paint visual gave inaccurate rate of paint flow, did not respond rapidly to changes made to the paint flow and Angie could not be made accurately. Additional problem that occur with these conventional septum are entrainment of oil and water in the air supply and clogged airline. The fluid flow control device of this invention ha none of the aforementioned problem and provide an exact slow raze of pain, accurate and rapid ripen time to change made in pain flow and ha none of the problems a660ciated with the use of compressed air wince air it not used to priors the paint containing vessel.
I a gear pump tabularly attached Jo the valve and to the fluid reservoir which meter fluid to the straying device through the valve at an exact flow rate;
(4) a variable speed o'er connected to the gear jump:
(5) a motor speed controller electrically connected to the motor with an electrical signal fed back prom the rotor to the controller to monitor the motor and maintain the motor at continue speed; and ~23275~
(C) an input mean electrically connected to the motor speed controller for providing motor speed data to the controller:
wherein motor speed data which it directly related to fluid flow rate it fed through the input mean to the motor speed controller which activate and control the variable speed motor that drive the gear pump and Anton the motor at a constant speed to provide an exact flow rate of fluid to the spraying device when the spraying device it activated and the valve it in the fir t pun.
RIFE DESCRIPTION OF THE DRAWING
The figure show a schematic diagram of the fluid flow control device of this invention used in conjunction with a spray gun.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
he fluid flow control device it generally used in conjunction with application ox paints. The device can be used in an automatic spray machine in which an exact amount of paint mutt be applied to a panel which it used for a color standard for paint manufacturing or paint dolor testing. Alto, the device can be used with paint spraying robot which are used on automobile and truck manufacturing line. A human operator it not prevent to aye minor ad3u~t~ents during spraying and therefore, toe flow raze of the paint being applied must be accurately controlled. If too much paint it applied the reloan coating run and ago if zoo little it applied, toe coverage will nut be surf f iciest resulting in a poor appearance of the resulting finish.
In reference to the FIG, paint 1 it pored in a container 2 and it wept mixed wit paint ~327~
stirrer 3. A gear pump 4 pump the pain from toe container 2 through tube to ye spray gun 5 trough two pun valve 6 or Russell paint back to the container 2 depending on the petunia of the valve 6. A shown in the FIG., toe valve 6 it in it second position and paint I being recycled through a tube back Jo the container 2. The arrow adjacent to the tube indicate dlrectiDn of paint flow.
when the spray gun 5, typically a DeVilbis6*
AGB541, it engaged compared air it fed into toe gun to atomize the paint for spraying. A signal engage gun 5 and activate valve operator 7 which move the valve 6 to to fir t position that allow paint to flow to the spray gun 5. The dotted line from the gun 5 illu6tcate paint being sprayed.
Preferably, toe valve 6 it a two position ball valve and the valve operator 7 connected to the valve it an air operated double acting put which it drive by ~ompre66ed air. Preferably, the ball valve an the double acting piston valve operator 7 are coupled together in one unit. One preferred unit it jade by iota Company, Highland Height, Ohio and is a DOW 180 Double acting valve No.
SS-45~SB-153DA-LSK-153.
US Toe pump 4, typically a Zenith pup jade by Zenith Predate Company it a precision rotary gear ~eterlng pump that provide an accurate flow rate of paint of about 300-700 cc/min. Zenith pumps Rich pump a a flow rate of about 0.16-50 cc/revolution can I be used. These pump are equipped with reducing gear amiably to provide a fixed gear ratio to drive the pump iota variable speed motor 8. A magnetic pickup monitoring a gear can be used to provide digital pulse feed back to the rotor speed controller I.
* denotes trade mark issue The o'er 8 used to drive the pump 4 typically it a DO motor of 1/2 HP (horsepower) with a variable speed of 90-1800 rum. DO outwore of 1/4-1 HP can be used with appropriate change it gearing to drive the pump.
A rotor speed controller 9 electrically attacked to toe motor 8 and eta the speed of the rotor and through a digital closed circuit feed back loop ~onitor6 and adjust the actual speed of the rotor. As mentioned above, one of the query can be monitored Vito magnetic pickup to err rotor speed. Typically, a Zenith TYPE QM-1412 rotor speed controller is used. The speed of the motor can be set manually by jetting command switches or can be fed to the speed controller through tube speed control input 10.
The speed control input 10 can be a manual keyboard, typically RCA*VP 611 which Jay Dave a display Ann, typically an IEE*Corp 8822-95-080, both of which are controlled by a computer described below. Allah. a digital computer can be used a the speed control input. Standard calculation are used to convert fluid flow of paint to motor speed taxing into consideration all parameter of the system.
Table or chart can be established providing the relationship of fluid flow to rotor speed.
A digital computer cub as an Intel SAC
Bolos Micro-computer. ~ational*se~iconductor BLOC 8014 microcomputer or an Intel SAC 8020 Microcomputer can be used in the speed control input. One advantage of a computer or microprocessor it that the input data can be directly used a fluid flow and data will be prosody and converted to rotor speed Ed fed to the controller 9.
* denotes trade mark ~32~5~
The fluid flow control device has many advantage over the conventional stem which use an air pre~6urized paint containing vessel to control paint flow. These air pre6~urized paint visual gave inaccurate rate of paint flow, did not respond rapidly to changes made to the paint flow and Angie could not be made accurately. Additional problem that occur with these conventional septum are entrainment of oil and water in the air supply and clogged airline. The fluid flow control device of this invention ha none of the aforementioned problem and provide an exact slow raze of pain, accurate and rapid ripen time to change made in pain flow and ha none of the problems a660ciated with the use of compressed air wince air it not used to priors the paint containing vessel.
Claims (6)
1. A paint flow control device for a liquid paint spraying system having a spraying device which when activated sprays paint on a work piece, and a paint reservoir tubularly connected to the spraying device; wherein the paint flow control device comprises (1) a two position rotatable ball valve that is tubularly connected to the spraying device and to the paint reservoir, said valve having a first position that allows paint to flow from the paint reservoir to the spraying device and a second position that allows recycling of paint to the paint reservoir;
(2) A valve operator means coupled to the valve and to the spraying device which when the spraying device is activated to spray paint moves the valve to the first position;
(3) a gear pump tubularly attached to the valve and to the paint reservoir which meters paint to the spraying device through the valve at an exact flow rate;
(4) A variable speed D.C. motor connected to the gear pump;
(5) a digital motor speed controller electrically connected to the motor and having a closed loop feedback circuit connected from the motor to the controller wherein an electrical signal indicating motor speed is fed back from the motor to the controller to monitor the motor and the controller without a time delay maintains the motor at constant speed; and (6) an input means electrically connected to the motor speed controller for providing motor speed data to the controller;
wherein motor speed data being directly related to paint flow rate is fed through the input means to the motor speed controller which activates and controls the variable speed motor that drives the gear pump and maintains the motor and gear pump at a constant speed to provide an exact flow rate of paint to the spraying device when the spraying device is activated and the valve is in the first position.
(2) A valve operator means coupled to the valve and to the spraying device which when the spraying device is activated to spray paint moves the valve to the first position;
(3) a gear pump tubularly attached to the valve and to the paint reservoir which meters paint to the spraying device through the valve at an exact flow rate;
(4) A variable speed D.C. motor connected to the gear pump;
(5) a digital motor speed controller electrically connected to the motor and having a closed loop feedback circuit connected from the motor to the controller wherein an electrical signal indicating motor speed is fed back from the motor to the controller to monitor the motor and the controller without a time delay maintains the motor at constant speed; and (6) an input means electrically connected to the motor speed controller for providing motor speed data to the controller;
wherein motor speed data being directly related to paint flow rate is fed through the input means to the motor speed controller which activates and controls the variable speed motor that drives the gear pump and maintains the motor and gear pump at a constant speed to provide an exact flow rate of paint to the spraying device when the spraying device is activated and the valve is in the first position.
2. The device of Claim 1 in which the valve operator means is a double acting piston-driven pneumatically actuated mechanism.
3. The device of Claim 2 in which the spraying device is a spray gun.
4. The device of Claim 3 which controls the paint flow rate to the spray gun between about 300-700 ml/minute and uses a paint having a viscosity between 25-200 centipoises measured at 25°C.
5. The device of Claim 4 in which the input means comprises a manual electronic keyboard coupled to a computer which feeds motor speed data to motor speed controller.
6. The device of Claim 5 in which the input means comprises a digital computer programmed to allow for entering of fluid flow data and converts said data to motor speed data which is fed to the motor speed controller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56699383A | 1983-12-30 | 1983-12-30 | |
| US566,993 | 1983-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1232752A true CA1232752A (en) | 1988-02-16 |
Family
ID=24265318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000471060A Expired CA1232752A (en) | 1983-12-30 | 1984-12-27 | Fluid flow system for paint spray guns |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE901406A (en) |
| CA (1) | CA1232752A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486350A (en) * | 2017-07-11 | 2017-12-19 | 南京上美冠丰塑胶有限公司 | A kind of spray robot servo gear pump paint feeding system |
| CN111013852A (en) * | 2019-12-23 | 2020-04-17 | 广东创智智能装备有限公司 | Non-contact fluid conveying and flow monitoring closed-loop control device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5228622A (en) * | 1992-06-19 | 1993-07-20 | Graco Inc. | Spraying system having pressure safety limits |
-
1984
- 1984-12-27 CA CA000471060A patent/CA1232752A/en not_active Expired
- 1984-12-28 BE BE0/214260A patent/BE901406A/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486350A (en) * | 2017-07-11 | 2017-12-19 | 南京上美冠丰塑胶有限公司 | A kind of spray robot servo gear pump paint feeding system |
| CN111013852A (en) * | 2019-12-23 | 2020-04-17 | 广东创智智能装备有限公司 | Non-contact fluid conveying and flow monitoring closed-loop control device |
| CN111013852B (en) * | 2019-12-23 | 2023-11-14 | 广东创智智能装备有限公司 | Non-contact fluid conveying and flow monitoring closed-loop control device |
Also Published As
| Publication number | Publication date |
|---|---|
| BE901406A (en) | 1985-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |