CA2346419A1 - Painting device - Google Patents
Painting device Download PDFInfo
- Publication number
- CA2346419A1 CA2346419A1 CA002346419A CA2346419A CA2346419A1 CA 2346419 A1 CA2346419 A1 CA 2346419A1 CA 002346419 A CA002346419 A CA 002346419A CA 2346419 A CA2346419 A CA 2346419A CA 2346419 A1 CA2346419 A1 CA 2346419A1
- Authority
- CA
- Canada
- Prior art keywords
- paint
- scraper
- changing device
- colour changing
- control element
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air
-
- 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
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
- B08B9/0551—Control mechanisms therefor
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Spray Control Apparatus (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Confectionery (AREA)
- Fluid-Driven Valves (AREA)
- Seal Device For Vehicle (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
Prior art painting devices are perceived as being disadvantageous in that a relatively large amount of paint is lost during cleaning carried out using a scraper, and by virtue of the fact that the color changing device can not be fully cleaned. In order to prevent this drawback, the invention provides that the scraping station (66) assigned to the color changing device (48) is arranged on the end of the color changing device (48) facing away from the connecting device (12). This enables the scraper, during a cleaning process, to also move through the color changing device (48) and to clean the same. In order to prevent a contamination of the paint supply device (60, 62, 64), a control element (18) closes a paint valve (54, 56, 58), which has just been opened, at the moment in which the scraper moves past the opening of the corresponding paint supply line (61, 63, 65). The position of the scraper is detected by a sensor (50) in the area of the color changing device (48). The residual paint present in the color changing device (48) between the opening of the corresponding paint supply line (61, 63, 65) and the scraping station (66) is carried away via a residual paint channel (72).
Description
Painting device The invention relates to a painting device as described in the preamble to claim 1.
._ Painting devices of this kind are known as commercial products. In them a so-called "scraper" is used to clean the connecting device (generally a hose) between the colour changing device and the gun unit. What is meant by this is a member, e.g. a ball, which is moved through the connecting device by for example the application of pressure. With a cleaning agent added if required, the connecting device can be cleaned in t=his way In the known painting devices, during painting the scraper is situated at a scraper station. in the area of the gun unit. There :is a further scraper station situated at that end of the colour changing device (what. is meant by this is a device which can connect the painting gun, as desired, to one of a plurality of coloured paints which are fed foz-ward and which are generally under pressure) which is adjacent the connecting device.
When the user interrupts the painting process, to change to a new colour for example, the paint still present in the connecting device is first drawn back by a pump. Then the scraper is moved from its station situated at the gun unit to the scraper station at the colour changing device and the connecting device is flushed out behind the scraper with air and a cleaning agent, e.g. paint thinners.
In the course of this the paint residues still present in the connecting device are forced back into the colour changing device and the corresponding paint supply line. Compressed air is then applied to the scraper station assigned to the colour changing device and this moves the scraper back towards the gun unit. As it moves the scraper pushes the cleaning agent and the paint residues dissolved therein along in front of it and the cleaning agent is sprayed out through the gun unit and can be caught in, for example, a tank. Having reached the gun unit the scraper moves back to its rest position at the scraper station there.
._ Painting devices of this kind are known as commercial products. In them a so-called "scraper" is used to clean the connecting device (generally a hose) between the colour changing device and the gun unit. What is meant by this is a member, e.g. a ball, which is moved through the connecting device by for example the application of pressure. With a cleaning agent added if required, the connecting device can be cleaned in t=his way In the known painting devices, during painting the scraper is situated at a scraper station. in the area of the gun unit. There :is a further scraper station situated at that end of the colour changing device (what. is meant by this is a device which can connect the painting gun, as desired, to one of a plurality of coloured paints which are fed foz-ward and which are generally under pressure) which is adjacent the connecting device.
When the user interrupts the painting process, to change to a new colour for example, the paint still present in the connecting device is first drawn back by a pump. Then the scraper is moved from its station situated at the gun unit to the scraper station at the colour changing device and the connecting device is flushed out behind the scraper with air and a cleaning agent, e.g. paint thinners.
In the course of this the paint residues still present in the connecting device are forced back into the colour changing device and the corresponding paint supply line. Compressed air is then applied to the scraper station assigned to the colour changing device and this moves the scraper back towards the gun unit. As it moves the scraper pushes the cleaning agent and the paint residues dissolved therein along in front of it and the cleaning agent is sprayed out through the gun unit and can be caught in, for example, a tank. Having reached the gun unit the scraper moves back to its rest position at the scraper station there.
It is a disadvantage of the known painting device that there is still a certain amount of residual paint in the colour changing device at the end of the cleaning process. Hence, what first comes out of the gun at the start of a new painting operation is paint contaminated with residual paint. Hence the user first has to spray off some paint before he can start the painting operation proper. This increases paint consumption, something which is considered bad particularly from the environmental point of view.
The object of t:he present invention is therefore to refine a painting device of the kind specified at the beginning so that the amounts of paint wasted in the cleaning process and the amounts of residual paint present in the system after a cleaning process are considerably reduced.
This object is achieved by the painting device spe~~ified in claim 1.
Since the scraper station assigned to the colour c~zanging device is situated at the end of the colour changing device adjacent the connecting device, the scraper can move through the entire colour changing device and clean it. A cleaning agent, e.g. liquid thinners, which may be present behind the scraper if required is prevented from getting into the paint supply device by closing the appropriate paint valve as soon as the scraper moves past the opening of the relevant paint suppl~~ line. The amount of paint which is then still present in the colour changing device is carried away by the residual-paint valve device. It can be re-used if required and is in any case many times smaller than in conventional painting devices.
On its way from the scraper station at the colour changing device to its starting position in the scraper station in the gun unit, the scraper pushes the cleaning agent which may be present along in front of it and the latter emerges through the gun unit into, for example, a collect=ing tank and as it does so it cleans the gun unit, or rather_ the jet of the actual spray-gun, as well.
Hence, at the end of a cleaning operation the paint=ing device including the colour changing device has been cleaned, and painting with a new colour can therefore begin at once. The only amount of paint which is not immediately available again is the one situated in the colour changing device between the opening of the paint supply line and the end position of the scraper.
The object of t:he present invention is therefore to refine a painting device of the kind specified at the beginning so that the amounts of paint wasted in the cleaning process and the amounts of residual paint present in the system after a cleaning process are considerably reduced.
This object is achieved by the painting device spe~~ified in claim 1.
Since the scraper station assigned to the colour c~zanging device is situated at the end of the colour changing device adjacent the connecting device, the scraper can move through the entire colour changing device and clean it. A cleaning agent, e.g. liquid thinners, which may be present behind the scraper if required is prevented from getting into the paint supply device by closing the appropriate paint valve as soon as the scraper moves past the opening of the relevant paint suppl~~ line. The amount of paint which is then still present in the colour changing device is carried away by the residual-paint valve device. It can be re-used if required and is in any case many times smaller than in conventional painting devices.
On its way from the scraper station at the colour changing device to its starting position in the scraper station in the gun unit, the scraper pushes the cleaning agent which may be present along in front of it and the latter emerges through the gun unit into, for example, a collect=ing tank and as it does so it cleans the gun unit, or rather_ the jet of the actual spray-gun, as well.
Hence, at the end of a cleaning operation the paint=ing device including the colour changing device has been cleaned, and painting with a new colour can therefore begin at once. The only amount of paint which is not immediately available again is the one situated in the colour changing device between the opening of the paint supply line and the end position of the scraper.
Hence paint losses are considerably reduced in comparison with conventional painting device.
Advantageous refinements of the invention are specified in the subclaims.
According to claim 2, an important feature is that a paint pressure regulator is present which is arranged not in the .area of the colour changing device, where it would block the inlet of the latter for the scraper, but in the area of the gun unit. This allows the scraper to pass freely through the inlet from the connecting device to the colour changing device, thus enabling it to move into the colour changing devicE= and through it without any problems.
With the refinement detailed in claim 3, a single ;censor is all that is required to control the closing processes of the p<~int valve device and the residual-paint valve device.
In accordance with claim 4, a single control element is all that is required to achieve the aims of the invention.
The refinement of the invention detailed in claim 5 simplifies the handling of the painting device according to the invention because no additional devices are required at the gun end to operate the scraper.
The invention will now be explained in detail by reference to the single figure. This is a schematic block circuit diagram showing a painting device which is referred to generally by reference numeral 10 (for clearer identification, lines carrying fluid are shown in double lines in the block circuit diagram).
The painting device comprises a gun unit 12, a fixed unit 14, a connecting device which connects gun unit 12 to fixed unit 14 and which in the present case is in the form of a hose 16, and a control element 18 whose functions will be explained in detail later on.
The gun unit 12 will first be explained in detail.
A gun 20 comprises a spray jet 22 which is directed in the figux-a towards a tank 24. Connected to gun 20 is a paint pressure regulator 26. The latter is connected in turn via a valve 28 to a paint channel 30 which forms part of hose 16. Valve 28 has an opened and a closed position and is operated by control element 18 via a line 31.
Gun 20 is mechanically connected to a switch 32 which supplies r_ontrol element 18 with an input signal via a line 34. As will be descr:ibed further on, switch 32 initiates a cleaning process.
Gun unit 12 also comprises a scraper station 36 at which a scraper (not shown in the figure) has its starting position. Scraper station 36 is connected at one end to paint channel 30 and at the other end to a valve 38. The latter is operated by control element 18 via a line 40 and connects scraper station 36 to a secondary channel 42 which also forms part of hose 16.
In the area of the outlet from scraper station 36 ~o paint channel 30 is arranged a movement sensor 44 which, via a line 46, emits a signal to control element 18 when the scraper moves past it.
The functional elements of the fixed unit 14 will now be explained. The latter firstly comprises a colour changing device 48 which is essentially an elongated cylindrical chamber. At the end where the hose is situated, colour changing device 48 is connected to paint ch<~nnel 30. At t=his end there is also a movement sensor 50 arranged which, via a line 52, emits a signal to control element 18 when the scraper moves past it.
Arranged at the side of colour changing device 48 <~:re valves 54, 56 and 58 which are able to connect the interior of colour changing device 48 to any one of paint supply devices 60, 62 and 64. Paint supply lines 61, 63 and 65 lead from paint supply devices 60, 62 and 64 via p<~int valves 54, 56 and 58 to colour changing device 48. The corresponding openings at whic=h supply lines 61, 63 and 65 open into colour changing device 48 are referred to by reference numerals 55, 57 and 59. Valves 54, 56 and 58 are operated by control element 18 via lines 66, 68 and 70.
It should be pointed out here that, to keep the figure clear, only three paint supply lines have been shown in the present embodiment. In other embodiments there may be 50 or more paint supply de=vices connect=ed. The colour changing device then has to be made larger t=o suit of course.
WO 01/10564 PC''C/EP00107596 At the end remote from hose 16, colour changing device 48 is connected to a scraper station 66 at which the scraper has its end position. Arranged between scraper station 66 and colour changing device 48 is a movement sensor 68 which, via a line 70, emits a signal to the control element when the scraper moves past it.
At that end of scraper station 66 which is remote from colour changing device 48, scraper station 66 is connected via a residual-paint channel 72 and a residual-paint valve 74 to an outlet opening 76 which in the present embodiment is situated above a residual-paint tank 78. Residua l-paint valve 74 is operated by control element 18 via a line 80.
At its end remote from colour changing device 48, ;scraper station 66 is also connected to a valve 82 which is operated by control element 18 via a line 84. At its other end valve 82 is connected to a source of compressed air 86.
From the latter', via a line 88, a tank 90 also has a cleaning agent, e.g.
paint thinners, supplied to it, tank 90 having in turn a connection for fluid to secondary channel 42.
Painting device 10 operates as follows:
In the normal painting mode, the scraper is situate=_d at the scraper station 36 in gun unit 12. The valve 38 in gun unit 12 is closed as also are the valves 74 and 82 downstream of the fixed scraper st=,~tion 66. No more than one of paint valves 54, 56 and 58 is ever open. In the present case it will be assumed that paint valve 56 is open and paint valves 54 and 58 are closed. Hence paint passes from paint supply device 62 via paint supply line 63 through paint valve 56 and through opening 57 into colour changing device 48 and from there via paint channel 30 through open valve 28 in gun unit 12 and via paint pressure regulator 26 into gun 20. The paint is sprayed out through jet 22.
If the user now wants to change the colour of the paint for example, he hooks gun unit 12 into tank 24.
WO 01/10564 PC1'/EP00/07596 This operates switch 32, which emits a signal to control element 18 (the switch can co-operate with tank 24 either mechanically or without physical contact). The signal indicates to control element 18 that gun unit 12 has been hooked into tank 24 and the control element then causes valve 28 to close and valve 38 to open. Due to the pressure applied from pressurised reservoir 86, cleaning agent passes from tank 90 via secondary channel 42 and open valve 38 into scraper station 36 and ford=s the scraper (not shown) into paint channel 30. In this channel the scraper first moves to colour changing device 48 in fixed unit 14 and as it does so it forces the residual paint left in paint channel 30 along in front of it and back into paint supply line 63. At the same time the section of paint channel 30 situated behind the scraper fills with cleaning agent.
When the scraper moves past the inlet to colour changing device 48 it is detected by sensor 50 which emits a signal to control element 18 via line 52. Stored in a memory in control element 18 is a rime interval which is equal to the time, as calculated or as determined :in preliminary tests, which the scraper needs to cover the distance from sensor 50 to the opening 57 of paint supply line 63 and this time interval :is now called up. At the same time a timer (not shown) starts to run. When the elapsed time is equal to the value called up from the memory, or in other words when t=he scraper is in front of opening 57, control element 18 closes paint valve 56 and opens residual-paint valve 74.
The scraper now moves on to its end position in scraper station 66 and as it does so it forces the amount of residual paint present in the chamber of colour changing device 48 between opening 57 and scraper station 66 through residual-paint channel 72 and outlet opening 76 and into residual-paint tank 78. The fact that paint valve 56 is closed stops cleaning agent from making its way into paint supply pipe 63.
Once the scraper reaches its end position in scraper station 66, this is detected by sensor 68, which emits a signal to control element 7.8 via line 70. As a result, control element 18 causes valves 28 and 82 to open and valves 38 and 74 to close. Compressed air is now applied to the other side of the scraper from compressed air reservoir 86 and the scraper is forced back through colour changing device 48 and into paint channel 30.
The cleaning agent present in paint channel 30 is forced by the scraper through open valve 28, paint pressure regulator 26 and gun 20 to spray jet 22 and it emerges from this into tank 24. Once the scraper has arrived back at scraper station 36, i.e. at its starting position, this is sensed by sensor 44 which emits a signal to control element 18. Control element 18 closes valve 82 again and this terminates the cleaning process. The user can now select a fresh colour at control element 18 for example and open the corresponding valve 54, 56 or 58.
Advantageous refinements of the invention are specified in the subclaims.
According to claim 2, an important feature is that a paint pressure regulator is present which is arranged not in the .area of the colour changing device, where it would block the inlet of the latter for the scraper, but in the area of the gun unit. This allows the scraper to pass freely through the inlet from the connecting device to the colour changing device, thus enabling it to move into the colour changing devicE= and through it without any problems.
With the refinement detailed in claim 3, a single ;censor is all that is required to control the closing processes of the p<~int valve device and the residual-paint valve device.
In accordance with claim 4, a single control element is all that is required to achieve the aims of the invention.
The refinement of the invention detailed in claim 5 simplifies the handling of the painting device according to the invention because no additional devices are required at the gun end to operate the scraper.
The invention will now be explained in detail by reference to the single figure. This is a schematic block circuit diagram showing a painting device which is referred to generally by reference numeral 10 (for clearer identification, lines carrying fluid are shown in double lines in the block circuit diagram).
The painting device comprises a gun unit 12, a fixed unit 14, a connecting device which connects gun unit 12 to fixed unit 14 and which in the present case is in the form of a hose 16, and a control element 18 whose functions will be explained in detail later on.
The gun unit 12 will first be explained in detail.
A gun 20 comprises a spray jet 22 which is directed in the figux-a towards a tank 24. Connected to gun 20 is a paint pressure regulator 26. The latter is connected in turn via a valve 28 to a paint channel 30 which forms part of hose 16. Valve 28 has an opened and a closed position and is operated by control element 18 via a line 31.
Gun 20 is mechanically connected to a switch 32 which supplies r_ontrol element 18 with an input signal via a line 34. As will be descr:ibed further on, switch 32 initiates a cleaning process.
Gun unit 12 also comprises a scraper station 36 at which a scraper (not shown in the figure) has its starting position. Scraper station 36 is connected at one end to paint channel 30 and at the other end to a valve 38. The latter is operated by control element 18 via a line 40 and connects scraper station 36 to a secondary channel 42 which also forms part of hose 16.
In the area of the outlet from scraper station 36 ~o paint channel 30 is arranged a movement sensor 44 which, via a line 46, emits a signal to control element 18 when the scraper moves past it.
The functional elements of the fixed unit 14 will now be explained. The latter firstly comprises a colour changing device 48 which is essentially an elongated cylindrical chamber. At the end where the hose is situated, colour changing device 48 is connected to paint ch<~nnel 30. At t=his end there is also a movement sensor 50 arranged which, via a line 52, emits a signal to control element 18 when the scraper moves past it.
Arranged at the side of colour changing device 48 <~:re valves 54, 56 and 58 which are able to connect the interior of colour changing device 48 to any one of paint supply devices 60, 62 and 64. Paint supply lines 61, 63 and 65 lead from paint supply devices 60, 62 and 64 via p<~int valves 54, 56 and 58 to colour changing device 48. The corresponding openings at whic=h supply lines 61, 63 and 65 open into colour changing device 48 are referred to by reference numerals 55, 57 and 59. Valves 54, 56 and 58 are operated by control element 18 via lines 66, 68 and 70.
It should be pointed out here that, to keep the figure clear, only three paint supply lines have been shown in the present embodiment. In other embodiments there may be 50 or more paint supply de=vices connect=ed. The colour changing device then has to be made larger t=o suit of course.
WO 01/10564 PC''C/EP00107596 At the end remote from hose 16, colour changing device 48 is connected to a scraper station 66 at which the scraper has its end position. Arranged between scraper station 66 and colour changing device 48 is a movement sensor 68 which, via a line 70, emits a signal to the control element when the scraper moves past it.
At that end of scraper station 66 which is remote from colour changing device 48, scraper station 66 is connected via a residual-paint channel 72 and a residual-paint valve 74 to an outlet opening 76 which in the present embodiment is situated above a residual-paint tank 78. Residua l-paint valve 74 is operated by control element 18 via a line 80.
At its end remote from colour changing device 48, ;scraper station 66 is also connected to a valve 82 which is operated by control element 18 via a line 84. At its other end valve 82 is connected to a source of compressed air 86.
From the latter', via a line 88, a tank 90 also has a cleaning agent, e.g.
paint thinners, supplied to it, tank 90 having in turn a connection for fluid to secondary channel 42.
Painting device 10 operates as follows:
In the normal painting mode, the scraper is situate=_d at the scraper station 36 in gun unit 12. The valve 38 in gun unit 12 is closed as also are the valves 74 and 82 downstream of the fixed scraper st=,~tion 66. No more than one of paint valves 54, 56 and 58 is ever open. In the present case it will be assumed that paint valve 56 is open and paint valves 54 and 58 are closed. Hence paint passes from paint supply device 62 via paint supply line 63 through paint valve 56 and through opening 57 into colour changing device 48 and from there via paint channel 30 through open valve 28 in gun unit 12 and via paint pressure regulator 26 into gun 20. The paint is sprayed out through jet 22.
If the user now wants to change the colour of the paint for example, he hooks gun unit 12 into tank 24.
WO 01/10564 PC1'/EP00/07596 This operates switch 32, which emits a signal to control element 18 (the switch can co-operate with tank 24 either mechanically or without physical contact). The signal indicates to control element 18 that gun unit 12 has been hooked into tank 24 and the control element then causes valve 28 to close and valve 38 to open. Due to the pressure applied from pressurised reservoir 86, cleaning agent passes from tank 90 via secondary channel 42 and open valve 38 into scraper station 36 and ford=s the scraper (not shown) into paint channel 30. In this channel the scraper first moves to colour changing device 48 in fixed unit 14 and as it does so it forces the residual paint left in paint channel 30 along in front of it and back into paint supply line 63. At the same time the section of paint channel 30 situated behind the scraper fills with cleaning agent.
When the scraper moves past the inlet to colour changing device 48 it is detected by sensor 50 which emits a signal to control element 18 via line 52. Stored in a memory in control element 18 is a rime interval which is equal to the time, as calculated or as determined :in preliminary tests, which the scraper needs to cover the distance from sensor 50 to the opening 57 of paint supply line 63 and this time interval :is now called up. At the same time a timer (not shown) starts to run. When the elapsed time is equal to the value called up from the memory, or in other words when t=he scraper is in front of opening 57, control element 18 closes paint valve 56 and opens residual-paint valve 74.
The scraper now moves on to its end position in scraper station 66 and as it does so it forces the amount of residual paint present in the chamber of colour changing device 48 between opening 57 and scraper station 66 through residual-paint channel 72 and outlet opening 76 and into residual-paint tank 78. The fact that paint valve 56 is closed stops cleaning agent from making its way into paint supply pipe 63.
Once the scraper reaches its end position in scraper station 66, this is detected by sensor 68, which emits a signal to control element 7.8 via line 70. As a result, control element 18 causes valves 28 and 82 to open and valves 38 and 74 to close. Compressed air is now applied to the other side of the scraper from compressed air reservoir 86 and the scraper is forced back through colour changing device 48 and into paint channel 30.
The cleaning agent present in paint channel 30 is forced by the scraper through open valve 28, paint pressure regulator 26 and gun 20 to spray jet 22 and it emerges from this into tank 24. Once the scraper has arrived back at scraper station 36, i.e. at its starting position, this is sensed by sensor 44 which emits a signal to control element 18. Control element 18 closes valve 82 again and this terminates the cleaning process. The user can now select a fresh colour at control element 18 for example and open the corresponding valve 54, 56 or 58.
Claims (5)
1. ~Painting device having a) a gun unit which can be used to apply paint to a workpiece, b) a colour changing device to which at least two paint supply devices are connected, c) a connecting device by which the gun unit and the colour changing device are connected together, d) a scraper station assigned to the gun unit, e) a scraper station assigned to the colour changing device, f) a scraper which, during a cleaning phase, can be moved from the scraper station assigned to the gun unit through the connecting device and into the scraper station assigned to the colour changing device, and back again, g) a paint valve device which can connect any of the paint supply devices to the colour changing device or can completely break the connection, h) a residual-paint valve device which can connect the colour changing device to an outlet line, i) a control element which co-operates with the gun unit, the paint valve device and the residual-paint valve device, characterised in that j) the scraper station (66) assigned to the colour changing device (48) is situated in the vicinity of the end of the colour changing device (48) remote from the connecting device (12), k) present in the area of the colour changing device (48) is at least one sensor (50) which emits a signal to the control element (18) when the scraper moves past sensor (50) in the direction of the scraper station (66) assigned to the colour changing device (48), l) the control element (18) processes the signal from the sensor (50) in such a way that the paint valve device (56) which is open at the time is closed at the moment when the scraper moves past the opening (57) of the corresponding paint supply device (62) on its way to the scraper station (66) assigned to the colour changing device (48), m) the control element (18) opens the residual-paint valve device (74) at that moment.
2. Painting device according to claim 2, characterised in that it has a paint pressure regulator (26) which is arranged in the gun unit (12).
3. Painting device according to claim 1 or 2, characterised in that a) the sensor (50) is arranged at the inlet of the connecting device (16) to the colour changing device (48), b) the control element (18) comprises a memory in which is stored the time interval which the scraper requires to move from the sensor (50) to the opening (57) of the paint supply device (62) which is in fluid connection at the time with the colour changing device (48), c) the control element closes the corresponding paint valve device (56) on expiry of the time interval since the arrival of the signal and opens the residual-paint valve device (74) on expiry of this time interval.
4. Painting device according to claim 1 or 2, characterised in that a sensor is arranged at each opening of a paint supply device into the colour changing device and the control element closes the paint valve device which is open at the time and opens the residual-paint valve device, when it receives a signal from the corresponding sensor.
5. Painting device according to any of the foregoing claims, characterised in that the connecting device comprises a hose (16) which comprises at least one channel (30) for paint and at least one channel (42) for compressed air and/or cleaning agent.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19937474A DE19937474C2 (en) | 1999-08-07 | 1999-08-07 | Painting device with a gun unit, a color changing device and a piggable connecting device |
| DE19937474.0 | 1999-08-07 | ||
| PCT/EP2000/007596 WO2001010564A1 (en) | 1999-08-07 | 2000-08-04 | Painting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2346419A1 true CA2346419A1 (en) | 2001-02-15 |
Family
ID=7917678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002346419A Abandoned CA2346419A1 (en) | 1999-08-07 | 2000-08-04 | Painting device |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1119420B1 (en) |
| AT (1) | ATE307678T1 (en) |
| CA (1) | CA2346419A1 (en) |
| CZ (1) | CZ20011228A3 (en) |
| DE (2) | DE19937474C2 (en) |
| WO (1) | WO2001010564A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10710108B2 (en) | 2014-04-01 | 2020-07-14 | Eisenmann Se | Coating system and method for coating objects |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063234C1 (en) * | 2000-12-19 | 2002-07-04 | Duerr Systems Gmbh | Hose system, for coating vehicle bodywork, has an inner hose with a moving pig through it held without kinks in an outer hose by compressed air in the ring zone between them |
| DE10131562A1 (en) * | 2001-06-29 | 2003-01-16 | Duerr Systems Gmbh | Method and system for supplying a coating device |
| FR2832331B1 (en) * | 2001-11-16 | 2004-01-02 | Etcm Ensemblier | SELF-CONTAINED AND REMOVABLE INSTALLATION FOR SCRAPING PIPES IN A CLOSED CIRCUIT, ESPECIALLY FOR RINSING PAINT LINES CARRIED OUT DURING CHANGES IN TINT IN THE AUTOMOTIVE INDUSTRY |
| DE10211244A1 (en) * | 2002-03-13 | 2003-10-23 | Lactec Ges Fuer Moderne Lackte | Painting system for applying liquid coating material |
| DE10233005B4 (en) | 2002-07-20 | 2004-09-16 | Eisenmann Lacktechnik Kg | Device for supplying a sensor with high electrical potential in a paint shop with electrical energy |
| DE10235102B4 (en) * | 2002-08-01 | 2006-07-27 | Lac Tec GmbH Gesellschaft für moderne Lackiertechnik | Painting device with a piggable valve device |
| DE10239516A1 (en) * | 2002-08-28 | 2004-03-18 | Dürr Systems GmbH | Hose with pig for delivery of electrically conductive fluid paints or varnishes at high voltage comprises an inner layer enclosed in an insulating layer with high voltage resistance |
| FR2846895B1 (en) * | 2002-11-13 | 2005-06-24 | Etcm Ensemblier | AUTONOMOUS AND REMOVABLE INSTALLATION FOR SCRAPPING OF CLOSED-CIRCUIT PIPES, INTENDED IN PARTICULAR FOR UGNES PAINT RACING EFFECTED DURING TINT CHANGES IN THE AUTOMOTIVE INDUSTRY |
| DE10346601A1 (en) * | 2003-10-07 | 2005-05-12 | Duerr Systems Gmbh | Method and system for supplying material consumers via pigging lines |
| DE102004015417A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for cleaning a thick matter delivery line |
| DE102004042512A1 (en) * | 2004-09-02 | 2006-03-30 | Hydac Accessories Gmbh | valve device |
| KR20070118254A (en) * | 2005-04-13 | 2007-12-14 | 일리노이즈 툴 워크스 인코포레이티드 | Shuttle push system for coating applicators |
| DE102008015258B4 (en) * | 2008-03-20 | 2023-05-25 | Dürr Systems Ag | Color changer for a painting robot |
| DE102008037035B4 (en) * | 2008-08-08 | 2023-05-25 | Dürr Systems Ag | Valve arrangement of a painting robot |
| RU2492937C2 (en) | 2008-03-20 | 2013-09-20 | Дюрр Системз Гмбх | Varnishing robot and method of its operation |
| EP2669305A1 (en) | 2012-06-01 | 2013-12-04 | Solvay Sa | Process for manufacturing an epoxy resin |
| CN111939449B (en) * | 2020-09-15 | 2021-02-19 | 广州仁麦生物科技有限公司 | Wound cleaning device with biosensor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221047A (en) * | 1991-08-13 | 1993-06-22 | Gmfanuc Robotics Corporation | Method and system for cleaning a paint supply line and changing paint colors in production paint operations |
| US5882428A (en) * | 1997-09-09 | 1999-03-16 | Graco Inc | Method of flushing a circulation system using first and second rigs |
| DE59809327D1 (en) * | 1997-07-03 | 2003-09-25 | Lactec Gmbh | Painting device |
| DE19742588B4 (en) * | 1997-09-26 | 2009-02-19 | Dürr Systems GmbH | Method for serial coating of workpieces |
-
1999
- 1999-08-07 DE DE19937474A patent/DE19937474C2/en not_active Expired - Fee Related
-
2000
- 2000-08-04 EP EP00960395A patent/EP1119420B1/en not_active Expired - Lifetime
- 2000-08-04 AT AT00960395T patent/ATE307678T1/en not_active IP Right Cessation
- 2000-08-04 CZ CZ20011228A patent/CZ20011228A3/en unknown
- 2000-08-04 CA CA002346419A patent/CA2346419A1/en not_active Abandoned
- 2000-08-04 DE DE50011440T patent/DE50011440D1/en not_active Expired - Lifetime
- 2000-08-04 WO PCT/EP2000/007596 patent/WO2001010564A1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10710108B2 (en) | 2014-04-01 | 2020-07-14 | Eisenmann Se | Coating system and method for coating objects |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20011228A3 (en) | 2002-03-13 |
| DE19937474C2 (en) | 2001-08-02 |
| EP1119420A1 (en) | 2001-08-01 |
| DE50011440D1 (en) | 2005-12-01 |
| ATE307678T1 (en) | 2005-11-15 |
| DE19937474A1 (en) | 2001-03-22 |
| EP1119420B1 (en) | 2005-10-26 |
| WO2001010564A1 (en) | 2001-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |