EP3068714A1 - Luftsteuerung für einen saugkopf - Google Patents
Luftsteuerung für einen saugkopfInfo
- Publication number
- EP3068714A1 EP3068714A1 EP14799154.1A EP14799154A EP3068714A1 EP 3068714 A1 EP3068714 A1 EP 3068714A1 EP 14799154 A EP14799154 A EP 14799154A EP 3068714 A1 EP3068714 A1 EP 3068714A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- ejector
- suction
- working
- blown
- 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.)
- Withdrawn
Links
- 238000012545 processing Methods 0.000 claims abstract description 45
- 210000000056 organ Anatomy 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 39
- 238000007664 blowing Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000003570 air Substances 0.000 description 330
- 241000252254 Catostomidae Species 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
- B65H3/0891—Generating or controlling the depression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/16—Controlling air-supply to pneumatic separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/40—Fluid power drive; Fluid supply elements
- B65H2406/41—Valves
- B65H2406/414—Servo valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/50—Timing
- B65H2513/52—Age; Duration; Life time or chronology of event
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/20—Volume; Volume flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/30—Forces; Stresses
- B65H2515/34—Pressure, e.g. fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/21—Industrial-size printers, e.g. rotary printing press
Definitions
- Air control for a suction head The invention relates to a device according to the preamble of claim 1.
- sheet-processing machines such as on sheet-fed rotary printing presses
- sheet-shaped substrates such as printing material sheet B
- the printing material sheets B are separated from a stack of sheets and fed to the machine with exact timing in the working cycle of the machine.
- suction head for singulation on a sheet feeder.
- the suction head separates by means of suckers the uppermost printing material B of the sheet stack and promotes this to a transfer unit, which is often designed as a belt table so that it can be passed by means of this machine to the sheet processing.
- the suction cups are used as separating suction cups for separating lifting of the printing material sheets B and
- the suckers are driven by corresponding drive mechanisms in a sequence corresponding to the clockwise movement, wherein the separating suckers execute an up-and-down movement oriented essentially vertically to the surface of the sheet stack and wherein the drag suckers have an aligned substantially parallel to the surface of the sheet stack. and to carry out the movement.
- an adapted control of the suction air necessary for the detection of the printing material sheet is furthermore provided on the suckers.
- the air supply can be done by means of mechanically driven valves. Furthermore, it is known that the air supply of the suction head via valves by means of Ejek- control door systems. Furthermore, the air supply via individually controlled valves for each consumer (sucker) can be made.
- an air control and / or air control device is known from EP 1 020 388 B1.
- This is used on sheet feeders and is provided with an air pressure source which generates an overpressure on a nozzle and thus supplies an ejector to the beat of a sheet-processing machine.
- a negative pressure is generated by means of the blowing air at the ejector, which is led to a negative pressure consumer.
- a switchable shut-off valve serves to adjust the timing of the connection and connection of the vacuum consumers within a work cycle in response to production data in the cycle of the sheet-processing machine.
- EP 0 775 655 B1 discloses a suction and / or blown air control. This serves to supply the consumers of a feed device for sheets to a sheet-processing machine. A connection of the consumer is acted upon by the negative pressure of a vacuum source and the outlet of the consumer is directly connected to an outlet of an electrically controllable valve. A control device controls the valve in such a way that the consumer sucker is controlled depending on parameters of the rotation angle and the clock of the sheet-processing machine.
- the electrically controllable valve has for this purpose two switching positions, in their positions, the connection and disconnection of the suction air are made functionally.
- DE 10 2012 103 772 A1 discloses a device for supplying a vacuum consumer of a sheet-processing machine in a working cycle of the sheet-processing machine with negative pressure.
- a first valve arranged between an air pressure source and an ejector can be opened and closed by a control unit during each working cycle, wherein the inlet of the ejector is subjected to a positive pressure air flow and flows through the ejector to an outlet leading to the atmosphere.
- a negative pressure consumer is coupled between the inlet and the outlet of the ejector via a suction line.
- the sheet-processing machine Since the sheet-processing machine is operable with different clock cycles per unit time are stored in a memory according to several different opening times and each associated closing times of the first valve depending on several different numbers of working clocks per unit time.
- the control unit opens the first valve accordingly depending on the respective power stroke per unit time at the associated opening time and closes it at the associated closing time.
- DE 1 2007 001 617 T5 discloses methods and means by which a pressure different from ambient pressure is generated and fed to a sheet feeding printing press to effect or control the transport of sheets through the printing press.
- a pressure other than atmospheric pressure is formed and fed to a paper sheet in a sheet feeding printing machine.
- the working pressure is generated in a means arranged to supply the working pressure to the sheet to thereby effect or control the transport of the sheet in the printing press.
- a drive pressure is delivered to a high pressure ejector, thereby determining the working pressure delivered by the ejector.
- the driving pressure supplied to the ejector is adjusted in response to a comparison between the detected working pressure and a predetermined working pressure to achieve continuous adjustment of the working pressure to a respective sheet.
- the vacuum gripping device has a vacuum gripper, a processing device, a sensor device for providing a fluid and / or vacuum-related sensor signal and a fluid control valve which can be controlled by the processing device for a vacuum on the vacuum gripper.
- a control signal is output from the processing device to the fluid control valve at a control time, determination of an action time at which a change of the sensor signal has occurred by a predeterminable amount of change, and calculation of a correction value based on a temporal time Difference between the activation time and the time of action and correction of activation time or activation duration of the fluid control valve.
- DE 10 2012 209 578 A1 discloses a method for supplying compressed air to a printing press, a compressed air supply for a printing press and the use of a low-pressure valve controlled by two proportional valves for supplying compressed air in a printing machine.
- valves In order to improve the compressed air supply of a printing press, these valves are placed in a first open position and opened or closed with a time delay to mitigate sudden pressure changes in the central supply line by switching operations on the valves.
- the compressed air is gradually discharged from the central supply line via the valves during blown air operation or, in the case of suction air operation, is gradually fed to the central supply line in such a way that the pressure changes are compensated by the control device of the compressed air generator.
- the air supply is not secure enough in such systems due to line losses and extended pressure reduction with extremely fast switching times and short switching cycles and despite the most accurate adjustment controls. It is therefore an object of the invention to improve devices for air supply of the type described above so that a secure air supply can be made possible.
- the solution of the invention is designed according to the features of patent claim 1.
- An apparatus for air control of air consumers is provided in the area of a sheet feeder of a sheet-processing machine.
- the sheet feeder has a suction head, wherein the suction head is provided with working members for separation or separation, for removal and for conveyance of printing material from the top of a stack of sheets in the sheet feeder.
- one or more ejectors are provided, which are provided with a compressed air connection and which are connected to the working organs of the suction head via air lines.
- a solenoid valve is associated with the compressed air connection of an ejector, which is designed for timed compressed air supply to the ejector via a blast air line.
- the ejector is connected to one or more work organizers.
- an air control device is provided, which is operated in time with the sheet-processing machine.
- a device for ventilation of Saugluftckerern in the area between an ejector and the / the work organs is connected.
- the / the work organs are connected via a suction air line with an air connection of the ejector for suction.
- the device is controllably arranged as a bypass with a blown air line from a first solenoid valve to the blown air supply of the ejector to a suction air line between the ejector and the / the work organs.
- the device is arranged independently of the first solenoid valve controllable as a blown air line from a second solenoid valve to the suction air line between the ejector and the / the work organs.
- the device is formed by the first solenoid valve, wherein the solenoid valve is designed controllable such that the Blas Kunststofftechnisch for connection of the solenoid valve with the ejector selectively in communication with the compressed air connection or in a connection with the Blas Kunststoff effet, which is used to connect the solenoid valve the suction air line between the ejector and the / the working organs used, is switchable.
- the / the work organs are connected via at least one Blas Kunststoff für with an air connection of the ejector for blowing air.
- the / the work organs are designed as blowing devices, wherein, the ejector for the generation of suction air and for the production of air blast with low pressure and increased volume is used.
- the air emerging from the ejector is throttled in pressure and enriched in volume with the air supplied via the air connection.
- the supply of blown air to the / the work organs is advantageously carried out via an air control device directly behind the outlet from the ejector.
- the air generating devices are designed to supply the different air streams to the same work organ or specifically to different work organs.
- At least one common control is assigned to the solenoid valve (s) in such a way that a temporally controlled supply of compressed air to the or each ejector synchronized with the working cycle of the sheet-processing machine can be carried out.
- an air control device is arranged in a line connection between the ejector (s) and the working members, by means of which the air flows generated in the air generating devices can be controlled in the working cycle and in the time duration.
- the air control device is advantageously designed as a control roller which has connections for suction air and / or blown air and has a valve roller which can be driven drivable in the machine cycle and has passages for suction air and / or blown air.
- the suction head is provided with air generating means with solenoid valves and ejectors for generating suction air and blown air, wherein the air generating means are each connected to respective working organs of the suction head via air ducts.
- a device for ventilating the suction cups, which are subjected to negative pressure, because the suction air is not quickly dissipated quickly from the residual pressure upstream of the ejector.
- the device is designed as a bypass with a fast-acting solenoid valve on a suction line between the ejector and the sucker.
- a device according to EP 1 398 285 B1 can be used as the ejector for generating blast air with low pressure and increased volume. Exiting air from the ejector is throttled in pressure and enriched in volume with the air supplied via the suction point. This air can therefore be used for winds in the Vorlock ceremonies and sheet separation. The control of this blowing air takes place optimally behind the ejector.
- the corresponding air supply is passed over a control roller, wherein a channel constriction can be used.
- a channel constriction can be used.
- solenoid valves no air flow regulation in stages is possible. Therefore, in this case, two air generators are used, which are preferably provided with a respectively conventionally generated characteristic. Furthermore, both air generators can open into the same fan or Blas Kunststoff redesigner.
- FIG. 1 shows a first embodiment according to the invention
- FIG. 2 shows a simplified embodiment of the first embodiment according to FIG. 1 according to the invention
- FIG. 3 shows a second embodiment according to the invention
- Figure 4 shows a third embodiment of the invention
- Figure 5 shows a fourth embodiment of the invention.
- FIG. 1 an arrangement for the suction air supply to a suction head 1 is shown symbolized.
- the suction head 1 is provided as part of a sheet-processing machine and can in this case be used, for example, in a sheet-fed printing press for the sheet separation of the printing material sheet B from a stack of sheets in a sheet feeder.
- the suction head 1 is operated with different types of workpieces 2, such as suckers for separating and transporting, in the working cycle of the sheet-processing machine, so that separated from a sheet stack stacks of printing material B from the suction head 1 can be transferred to the sheet processing machine for further processing .
- Working members 2, which are formed as suckers, have a housing in which a piston can move up and down to raise the sucker from a waiting position after taking a printing material B under the action of the negative pressure of the suction air in a working position.
- the suction head 1 here are various working members 2 associated with movable, which may be designed differently than suction organs or as blowing organs trained.
- the working members 2 are designed as separating or lifting suction or as tow or transport suction.
- the working members 2 are further arranged connected via different gear trainings with the suction head 1.
- the suction head 1 is further assigned, for the purpose of supplying air to the working members 2, with at least one suction-air generating system having at least one ejector 3, which is connected to one, several or all of the above-mentioned working members 2.
- the ejector 3 is operated for suction air supply according to the principle of a suction jet pump with compressed air, wherein the compressed air is passed through a nozzle at the narrowest point of an air connection is arranged.
- compressed air in the form of blown air is always meant.
- Compressed air is first supplied to the ejector 3 at a first air connection 3.1 under control of a first solenoid valve 4 in the delivery mode by a first compressed air line 5.
- the solenoid valve 4 is connected to a well-known compressed air supply 7. This can be coupled to a compressed air network in the sheet-processing machine operating operation. It may also be provided a special compressed air supply with an independent compressed air generator for ejectors.
- the ejector 3 is connected to a second air connection 3.2 via a suction air line 6 with the suction head 1 or one or more of its working members 2, which are then formed as suction organs.
- a suction air line 6 is connected to the ejector 3 in the region of a constriction, which is traversed by the compressed air. Due to the accelerated flow of compressed air in the constriction 6 air is sucked from the suction air line and in this way via the suction air line 6 in the working member 2, which is arranged at the end of Sauglufttechnisch 6 as Saugluft deviser, generates a negative pressure and thus in the working member 2, a suction air flow , which acts on its outboard work surface.
- an air outlet 13 is disposed on a third air connection 3.3 to the ejector 3, which provided with a sound attenuation element and / or also with a Valve can be controlled.
- the compressed air at the air outlet 13 is pressure-reduced and enriched in volume around the air drawn in by the consumer (s) as a sound-insulated and possibly controlled blowing jet.
- the first solenoid valve 4 is further connected via a second Blas Kunststoff effet 8 with the suction air line 6 by this opens in the region between the ejector 3 and the suction head 1 at a line branch 9 in the suction air line 6.
- the second blast air line 8 leads the suction head 1 in this way a first controlled flow of blowing air in the region of the suction air line 6 to. It should be noted that when switching the solenoid valve 4 for supplying compressed air via the compressed air line 8 in the suction air line 6 at the same time the air access to the solenoid valve 4 to the compressed air line 5 between the solenoid valve 4 and ejector 3 is blocked.
- the suction head 1 can be additionally supplied via a second supplied with compressed air solenoid valve 10, a further controlled flow of blowing air.
- the second solenoid valve 10 is connected via a third blown air line 1 1 to the line branch 9 in the suction air line 6 in the region between the ejector 3 and the working element 2 or the consumer in the suction head 1.
- the two solenoid valves 4 and 10 are common by means of a valve control 12 and independently operable.
- the valve control is coupled to a control computer to which a rotation angle signal is fed to the sheet-processing machine.
- the suction head 1 in line with the sheet-processing machine, can, for example, separate the printing material sheet B from a stack of sheets in a sheet feeder and convey it to the sheet-processing machine.
- the ejector 3 is supplied with a compressed-air pulse controlled by the solenoid valve 4, so that at the correct time and for the correct period of time through the suction air line 6 to the working members 2 of the suction head 1 a respective required negative pressure is applied, by means of which a printing material sheet is detected B can be done via, for example, one or more suckers.
- the second blown air line 8 designed as a compressed air bypass is charged with a compressed air pulse at the first solenoid valve 4.
- a pressure equalization at a time during which the air pressure in the first compressed air line 5 is still reduced to the ejector 3, in the thus still continuing negative pressure phase between the ejector 3 and the / the working organs 2 of the suction head 1, a pressure equalization maraf- fen,
- the conveyed printing material B can be detected and released in a timely manner.
- the supply of compressed air into the suction air line 6 is provided by the second solenoid valve 10 independently of the first solenoid valve 4. In this way, via the third blown air line 11, a specifically controlled compressed air flow for interrupting the negative pressure on the working device 2 or the consumer (s) can be used even earlier and more accurately.
- the effects of the compressed air streams emitted by the first and second solenoid valves 4, 10 can be combined with each other and adjusted to one another in order to achieve a maximum delivery rate for the suction head 1.
- the control of the suction air flow can be done in a suction head 1 in addition to an air control device 22 in the form of a known control roller. This is switched on in Saug Kunststoffweg the Saug Kunststoff für 6 between the / the work organs 2 and consumers.
- a control roller is a rotating valve member which is driven synchronously with the machine and releases or closes air passages via control openings in relation to the machine rotation angle. With the control roller a predetermined by the mechanically fixed valve design air supply is possible. By means of a control roller, combined air feeds for blowing air and suction air are also realized, so that all the consumption of a suction head 1 can be centrally controlled.
- the suction and / or blown air generation is used by means of one or more ejectors 3 for the timely, localized and consumption of compressed air temperature of the consumption air.
- FIG. 2 shows symbolically an arrangement for the suction air supply essentially corresponding to FIG. 1, wherein a printing material sheet B is to be detected by a working member 2, which is designed as a suction device.
- the suction head 1 is in turn assigned a suction air generating system with an ejector 3.
- the ejector 3 is connected via a first solenoid valve 4 with a compressed air supply 7. From the compressed air supply 7, the ejector 3 is supplied with compressed air, which is supplied via the solenoid valve 4 as a controlled blowing air flow via a first compressed air line 5.
- the ejector 3 is connected via a suction air line 6 to one or more working members 2, which may be designed as suckers.
- the suction air line 6 connected to an air connection 3.2 is supplied with suction air by accelerated flow and a negative pressure is produced in the work organ 2 or consumers.
- the first solenoid valve 4 is further connected via a second Blas Kunststoff für 8 with the suction air line 6 by this opens in the area between the ejector 3 and the / the work organs 2 of the suction head 1 at a manifold 9 in the suction air line 6.
- the second blown air line 8 can therefore supply the suction head 1 with a stream of blown air into the suction air area in this way.
- a targeted compressed air supply to the ejector 3 is made in the cycle of the sheet-processing machine by means of the first solenoid valve 4.
- the magnetic valve 4 is designed such that a circuit can be carried out in which a blown air connection 4.1 to the compressed air supply 7 is connected to a blown air outlet 4.2 to the blown air line 5.
- the Blas Kunststoffausgang 4.2 is then coupled via the Blas Kunststoff effet 5 with the ejector 3 and passes this to the controlled compressed air flow.
- the suction head 1 can be controlled via the ejector 3 in the cycle of the sheet-processing machine to separate the printing material sheet B from a stack of sheets in the sheet feeder and convey it to the sheet-processing machine.
- the ejector 3 is supplied in each case a blown air, so that at the right time on the suction air line 6 on the suction head 1 in the / the work organs 2 a negative pressure applied by means of which detecting, separating (separating) and / or conveying each sheet of printing material B means one or more working elements 2 designed as a suction device can take place.
- a predetermined time offset to the supply of compressed air to the ejector 3 is interrupted by the first solenoid valve 4 at the end of a separation and / or delivery cycle.
- the negative pressure at the / the work organs 2 in the suction head 1 must be interrupted. So that the negative pressure at the / the work organs 2 collapses in time and the recorded substrate sheet B can be released by the / the work organs 2 for further processing, to ensure that the negative pressure on the / the work organs 2 is actually released in good time and degraded as much as possible.
- the second blown air line 8 designed as a blown air bypass is connected directly to the blown air line 5 at the first solenoid valve 4, which leads to the ejector 3.
- the solenoid valve 4 By switching the solenoid valve 4 still stored under pressure air is introduced into the Blas Kunststoff effet 8 as Blas Kunststoffimpuls in this line section of the blast line 5 before the ejector.
- the blown air pressure in the first Blas Kunststoff effet 5 is still degraded to the ejector 3, created in the thus continuing vacuum phase between the ejector 3 and the working member 2 of the suction head 1, a pressure compensation.
- the pressurized air in the blast air duct 5 in the ejector 3 can not continue to produce suction air at the suction air outlet 3.2.
- the remaining in the first Blas Kunststoff für 5 under pressure air volume is introduced through the second Blas Kunststoff réelle 8 via the branch line 9 in the suction air line 6 and there is rapidly reducing the upcoming vacuum.
- the conveyed substrate sheets B can be recorded and released in real time.
- the ejector 3 on the side of the Blas Kunststoffaustritts the air outlet 13 in the Blas Kunststofftechnisch 6 downstream of an air control device 22 may be arranged by means of which the exiting suction air flow in the cycle of the sheet-processing machine is controllable.
- the blown air line 8 for reducing the negative pressure at the / the work organs 2 can be connected to the suction air line 6 before or after the air control device 22.
- FIG. 3 shows the use of blowing air present at an outlet of an ejector 30.
- the ejector 30 is supplied as described previously to Figure 1 with compressed air and generated by the air suction a negative pressure, which can be used optionally on working organs 2 and consumers for sucking and transporting printing material sheet B.
- This combined blast air flow is tempered by the arrangement of the suction effect of the sucked in the region of the suction head 1 air content in relation to the local environment conditions. Therefore, the blast air flow exiting the air outlet 13 of the ejector 30 is best suited for use in sheet separation on a suction head 1. This effect is due to the fact that the blast air flow largely has the properties of the ambient air in the vicinity of the sheet stack in the sheet feeder of the sheet-processing machine and thus does not have too great differences in temperature and humidity relative to the printing material sheet B to be processed.
- this blown air stream a specific embodiment is shown here. In this case, downstream of the ejector 30 on the side of the blown air outlet, the air outlet 13 is arranged in a blown air line 23, by means of which the outgoing blown air flow can be controlled again in time with the sheet-processing machine.
- the air control device 22 may also be designed in the manner of a control roller.
- a control roller is designed as a mechanical with the cycle of the sheet-processing machine driven valve control.
- the blast air control can also be carried out without an air control device 22 and is then controlled based on the machine cycle only by the control by means of the solenoid valve 40.
- the controlled blowing air flow can be additionally regulated in its volume and pressure.
- the tempered, as well as in the power stroke and possibly according to its pressure and volume controlled Blas Kunststoffstrom is then separately or combined supplied to one or more work organs 24, which are arranged as Blas Kunststoffchangeer the suction head 1 in the area of Bgentrennung at the top of the sheet stack in the sheet feeder ,
- the blast air flow is directed to areas of the side edges S of the sheet stack and serves to fanned the top sheet B of the sheet pile. These can be separated easier and safer from each other. Furthermore, the blast air flow can also be conducted under a printing material sheet B already separated from the upper side of the sheet stack so that it is provided with a carrying air cushion opposite the upper side of the sheet stack and can thus be reliably transported away in the direction of the sheet-processing machine.
- the blast air flow can also be supplied in differentiated physical quality (pressure, temperature, volume) and at different times in one or more different working cycles to the same working member 24 or blast air consumers for different effects in sheet separation and during sheet transport.
- a short blown air blast at elevated pressure can be used as a so-called separation air to pre-loosen the uppermost sheet of printing material B resting on the stack of sheets on a working member 24 acting as a blowing device in a first cycle section.
- FIG. 4 schematically shows a combined device according to FIGS. 2 and 3.
- a suction head 1 is shown both with working organs 2 in the form of suction devices as well as working organs 24 in the form of blowing devices.
- a working member 2 which is designed as a suction device, an ejector 3 in the manner described above for Sauglufterzeugung with the involvement of a solenoid valve 4 and an ejector 3 assigned.
- a separate air supply via an ejector 3 may be assigned to each of the working members 2, 24 shown, differing from this illustration.
- a common air supply via an ejector 3 can also be assigned to different working organs 2 for suction air processing.
- a common control 12 is provided for all air supply systems in conjunction with solenoid valves 4.
- the air control device 22 provided for the blown air generation in FIG. 4 can be designed as a control roller driven in the machine cycle, as already explained.
- an air control device 22 for both the control of the supply of suction air to the / the work organs 2 and the supply of blowing air to the / the work organs 24 suitable common control roller. This then takes on the of the suction air ducts 6 and the supplied from the Blas Kunststofftechnischen 23 working air in separate channels and directs them controlled to the working organs 2, 24 at the right time and in the right time each
- control roller can be omitted and their function can be replaced solely by the control of the solenoid valves 4.
- FIG. 5 diagrammatically shows a device according to FIG. 3 for improved blast air control.
- a blowing device working member 24 in a second section of a cycle another blown air lower pressure and increased volume for transporting conveying the printing material B as so-called carrying air for generating a Tragluftpolsters under a lifted from the surface of the sheet stack printing material B provided become.
- an air generating device for blowing air is provided according to Figure 3, in which by means of a solenoid valve 4 by a blast air duct 5, an ejector 3 is acted upon with compressed air.
- a blast air line 23 at the air outlet lass 13 of the ejector 3 By connecting a blast air line 23 at the air outlet lass 13 of the ejector 3, the air stream discharged there is fed to one or more working members 24.
- These working members 24 are designed as so-called carrying air blowers, in order to blow air from the stack side edge S forth under a separated and at its trailing edge lifted by suckers Bedruckstoffbo- gene B.
- a printing material sheet can have an extension of more than 0.75 square meters and therefore the carrying air first requires a certain amount of energy in order to reach the entire area under the printing material sheet B. Therefore, in a first phase, air flow of comparatively small volume but increased pressure is required to fulfill the function of reaching the whole arc surface.
- the carrying air cushion under the printing material B must remain intact for the best possible sheet conveying. For this it is advantageous to demand more air, but the printing material B must not flutter. Therefore, at this time, when the forward movement of the printing sheet B starts, an airflow of increased volume but lower pressure can be promoted. Therefore, it is provided that the blowing air generation, which is performed by the first ejector 3, to be designed so that a controller 12 is formed so that an air flow of short duration with increased pressure and low volume via the Blas Kunststofftechnisch 23 delivered to the / the working members 24 becomes.
- the controller 12 is first connected to the solenoid valve 4 according to Figure 5, which is connected to the discharge of compressed air via the Blas Kunststoff effet 5 with the ejector 3, wherein from the ejector 3, a first Blas Kunststoffstrom on the Blas Kunststoff effet 23 to the / the work organs 24 generated is. Furthermore, in FIG. 5, the control is connected to a second solenoid valve 51 which is connected to a compressed air connection 7 and which is connected to a second ejector 30 via a blown air line 51 for the delivery of compressed air. that is.
- the second ejector 30 is connected with its air outlet 13 for delivering a corresponding second Blas Kunststoffstromes via a Blas Kunststofftechnisch 52 with the / the same working organs 24, so that the second Blas Kunststoffstrom the same working organs 24 can be fed, which initially the first Blasluftstrom from the first ejector third had been supplied.
- the second Blas Kunststoffstrom is discharged from the ejector 30 following the first Blas Kunststoffstrom in air generation and provided with a lower pressure and a larger volume than the first Blas Kunststoffstrom generated by the ejector 3 was. Furthermore, the second blown air stream can be dispensed over a longer period of time, so that the printing material B can be safely taken over by further conveying means. Also in this embodiment, the ejectors 3, 30 on the side of the
- Blas Kunststoffaustritts the air outlet 13 in the Blas Kunststofftechnischen 23 downstream of an air control device 22 may be arranged by means of which the exiting suction air flow in the cycle of the sheet processing machine is controllable.
- This air control device 22 may be formed as a control roller.
- the solenoid valves 4, 10, 40, 50 are designed to time-release the pending on the compressed air supply 7 compressed air to the ejectors 3, 30 or lock. Solenoid valves are therefore well suited for this purpose in the region of the suction head 1, because they can be controlled in short and rapidly successive clock cycles and thus can follow the very short control times in machines which process very rapidly according to the state of the art.
- the solenoid valve 4 is further adapted to carry the compressed air in a second way or to block the compressed air from the ejector 3 and to establish a connection between further Blas Kunststoff ein.
- the design of solenoid valves and their switching options are well known, so that corresponding embodiments for known tasks are easy to find and used.
- one, several or each compressed air connection 7, a pressure control valve or at least one pressure gauge can be assigned.
- the arrangement can be provided so that a pressure control can be carried out individually or for several compressed air connections 7 together.
- one, several or all Saugluftan whyn and / or Blas Kunststoffan somehown to ejectors 3, 10, 30 may be arranged a pressure control valve to make the suction air and / or blown air generated by the ejectors 3, 10, 30 adjustable in terms of their negative pressure or overpressure.
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Abstract
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Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013112662 | 2013-11-16 | ||
DE102014116728.7A DE102014116728A1 (de) | 2013-11-16 | 2014-11-15 | Luftsteuerung für einen Saugkopf |
PCT/EP2014/074698 WO2015071446A1 (de) | 2013-11-16 | 2014-11-16 | Luftsteuerung für einen saugkopf |
Publications (1)
Publication Number | Publication Date |
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EP3068714A1 true EP3068714A1 (de) | 2016-09-21 |
Family
ID=51900876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14799154.1A Withdrawn EP3068714A1 (de) | 2013-11-16 | 2014-11-16 | Luftsteuerung für einen saugkopf |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3068714A1 (de) |
CN (1) | CN105705445B (de) |
DE (1) | DE102014116728A1 (de) |
WO (1) | WO2015071446A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7147453B2 (ja) * | 2018-10-15 | 2022-10-05 | コニカミノルタ株式会社 | 用紙搬送装置およびインクジェット画像形成装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19543440A1 (de) | 1995-11-22 | 1997-05-28 | Roland Man Druckmasch | Saug- und/oder Blasluftsteuerung |
DE19901341B4 (de) | 1999-01-15 | 2005-07-21 | Man Roland Druckmaschinen Ag | Luftsteuer- und/oder Luftregelungseinrichtung |
SE530098C2 (sv) | 2006-07-19 | 2008-03-04 | Xerex Ab | Sätt och anordning varmed alstras och tilll ett ark i en arkmatad tryckpress fördelas ett från atmosfärtryck skilt lufttryck för att verkställa eller påverka arkets transport i tryckpressen |
DE102007058114A1 (de) * | 2007-12-04 | 2009-06-10 | Festo Ag & Co. Kg | Vakuumerzeugervorrichtung und Verfahren zu ihrem Betreiben |
DE102012209578A1 (de) | 2011-06-06 | 2012-12-06 | Koenig & Bauer Ag | Verfahren zur Druckluftversorgung einer Druckmaschine, Druckluftversorgung für eine Druckmaschine und Verwendung eines von zwei Proportionalventilen angesteuerten Niederdruckventils zur Druckluftversorgung in einer Druckmaschine |
DE102011118168B4 (de) | 2011-11-10 | 2015-12-31 | Festo Ag & Co. Kg | Verfahren zum Betreiben einer Vakuumgreifeinrichtung, Vakuumsteuereinrichtung und Manipulator |
DE102012103772A1 (de) | 2012-04-27 | 2013-10-31 | Hans-Jürgen Kasprich | Einrichtung zur Versorgung eines Unterdruckverbrauchers einer Bogen verarbeitenden Maschine in einem Arbeitstakt der Bogen verarbeitenden Maschine mit Unterdruck |
CN203033632U (zh) * | 2012-12-22 | 2013-07-03 | 东莞市雅思机械设备有限公司 | 一种高精度吸纸控制器 |
-
2014
- 2014-11-15 DE DE102014116728.7A patent/DE102014116728A1/de active Pending
- 2014-11-16 CN CN201480062379.7A patent/CN105705445B/zh active Active
- 2014-11-16 WO PCT/EP2014/074698 patent/WO2015071446A1/de active Application Filing
- 2014-11-16 EP EP14799154.1A patent/EP3068714A1/de not_active Withdrawn
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2015071446A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102014116728A1 (de) | 2015-05-21 |
CN105705445B (zh) | 2018-05-25 |
CN105705445A (zh) | 2016-06-22 |
WO2015071446A1 (de) | 2015-05-21 |
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