DE102021112382B3 - Device and method for supplying compressed air to at least one compressed air consumer of a substrate processing and/or processing machine and machine for processing and/or processing substrates - Google Patents

Abstract

A device according to the invention for supplying compressed air to one or more compressed air consumers of a substrate processing and/or processing machine comprises a first valve in a line path upstream of one or more consumers to be supplied with compressed air, at the outlet of which compressed air can be provided at a pressure, via a first line path which compressed air at a first pressure can be made available to the first valve during operation in a first operating mode from a first compressor, a second line path, via which compressed air at a second pressure can be made available to the first valve during operation in a second operating mode from a compressed air reservoir, and a check valve in the first conductive path upstream of a point where the first and second conductive paths merge. Compressed air can be applied to the compressed air reservoir from the first or a further compressor via a line path that is different from the first and second line path and bypasses the junction point and/or the check valve. Furthermore, the invention also relates to a machine with such a device and a method for providing compressed air for supplying at least one compressed air consumer of a substrate processing and/or processing machine.

Description

The invention relates to a device and a method for supplying compressed air to at least one compressed air consumer of a substrate processing and/or machining machine and a machine for processing and/or machining substrates according to claims 1, 5 and 6.

through the DE 102 42 547 B4 a method and a device for supplying compressed air to a pneumatic system of a printing press is known, with a compressor supplying not only the system but also a compressed air reservoir as a buffer with compressed air in order to absorb consumption peaks or capacity overruns. The compressed air is stored in the buffer storage at a pressure above the maximum that can be provided by the compressor, which is between 6 bar and a maximum of 10 bar.

In the case of low-pressure systems, the blown air with an overpressure compared to the environment z. B. provide in the range of 0 to 2.5 bar, compressors are usually used, z. B. in the form of fan or ventilator systems that are or must be operated continuously during the operation of the devices to be supplied to the machine components, since they cause only a slow pressure build-up in the line system to the consumer due to their specific start-up behavior. The problem here is the supply of clocked to the machine operation or at least an intermittent need for blowing air, z. B. clocked to a sheet transport only in certain cycle phases or operating situations. In this case, either fluctuations that are harmful for stable operation due to temporarily interrupted blast air outlet when the low-pressure compressor continues to run have to be accepted, or compressed air previously provided via energy consumption is released into the environment during the interruption phases in the bypass.

the DE 10 2012 006 382 A1 discloses a pneumatic system with a compressed air supply system and a pneumatic system in the form of an air spring system for a vehicle. Pressure medium for the bellows valves to be supplied can be made available at an outlet of the pressure medium supply via a two-stage compressor with a first and a downstream second compressor stage and a check valve. Pressure medium coming from the first compressor stage can be fed to a pressure medium reservoir on a parallel line branch without passing through the check valve.

the DE 103 57 763 A1 also relates to a compressed air system for vehicles, in which service brake circuits are supplied from a compressor as prescribed via compressed air tanks arranged upstream in each case and can be dispensed with in the case of different consumer circuits.

The invention is based on the object of creating an improved device and a method for supplying compressed air to at least one compressed air consumer of a substrate processing and/or machining machine and a machine for processing and/or machining substrates, in particular also for supplying pressure in the low-pressure range.

The object is achieved according to the invention by the features of claims 1, 5 and 6, respectively.

The advantages that can be achieved with the invention are, in particular, that this ensures trouble-free operation of the aggregates or devices supplied with compressed air, especially in the low-pressure range, with particularly little pressure fluctuations, without, however, having to use energy unnecessarily to generate superfluous compressed air .

In particular, one or more compressed air consumers can be switched off during a start-up phase of the machine to be supplied or when a device in intermittent operation, i. H. for example clocked or required sporadically operated consumer, z. B. blowers to supply compressed air from a memory until the sluggish low-pressure compressor has started and provides a constant flow rate for the blower.

A device that is particularly suitable for this purpose for supplying compressed air to one or more compressed air consumers of a substrate processing and/or processing machine comprises a first valve in a line path upstream of one or more consumers to be supplied with compressed air, at the outlet of which compressed air of a pressure can be provided, a first line path , via which compressed air at a first pressure, in particular a pressure of at most 3 bar, can be made available to the first valve during operation in a first operating mode from a first compressor, a second line path via which the first valve during operation in a second operating mode Compressed air at a second pressure can be provided from a compressed air reservoir, in particular at a second pressure that is higher than, preferably at least three times, the first pressure, and a non-return valve in the first line path upstream of a point at which the first and second L unite pipeline. The compressed air reservoir is here from a further compressor via a different line from the first and second line, the junction and / or the return The line path bypassing the check valve can be pressurized with compressed air, in particular with a second pressure that is higher than the first pressure, preferably at least three times the second pressure. i.e. in particular that even in a sluggish start-up phase, compressed air can be made available quickly enough, in sufficient quantity and with sufficient pressure by the compressed air reservoir, and this can then be refilled in parallel and independently of the operation of the compressed air consumers for a new start-up after, for example, a further interruption to operation.

In the provision of compressed air for the supply of at least one compressed air consumer of a substrate processing and/or machining machine, the at least one compressed air consumer being supplied with compressed air at a first pressure via a control valve in controlled operation via a first line path from a first compressor the at least one compressed air consumer is supplied with compressed air at a second pressure higher than the first pressure via a second line path from a compressed air reservoir via the control valve in a start-up phase preceding regular operation, in which the previously inactive first compressor only starts up.

It is of particular advantage if the pressure accumulator during at least one period of time in regular operation or in the start-up phase, in which the at least one compressed air consumer is supplied with compressed air by the compressed air supply, is supplied with compressed air via a separate line path with compressed air above the level of that supplied by the first compressor maximum available pressure lying pressure is applied or can be.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

• 1 eine als Bogendruckmaschine ausgeführte Bogenverarbeitungsmaschine;
• 2 eine schematische Darstellung für den Aufbau einer Vorrichtung zur Druckluftversorgung gemäß einer ersten Ausführungsform;
• 3 eine schematische Darstellung für den Aufbau einer Vorrichtung zur Druckluftversorgung in einer nicht zur Erfindung gehörigen Ausführungsform.

Show it:

• 1 a sheet processing machine designed as a sheet printing machine;
• 2 a schematic representation of the structure of a device for compressed air supply according to a first embodiment;
• 3 a schematic representation of the structure of a device for compressed air supply in an embodiment not belonging to the invention.

A substrate B, in particular substrate B to be printed, preferably a sheet-like substrate B, processing and/or processing machine, also referred to below as a sheet-processing machine or printing press for short, comprises a substrate feed device 01, referred to, for example, as a feeder 01, a conveyor line 02 to a sheet feeder 03, for example , abbreviated as Annex 03, designated investment facility 03, z. B. comprises a sheet acceleration means 04 designed as a rocking gripper 04, and a substrate delivery device 08 designed, for example, as a sheet delivery device 08, in particular a stack delivery device 08. Between the substrate feed device 01 and the substrate delivery device 08 are one or more, also known as units 06; 07 designated processing stages 06; 07, which can be designed, for example, as a printing unit 06, coating unit 07, a drying, calendering or film transfer unit (not shown here) or in another suitable manner. If the sheet processing machine is designed as a printing machine, in particular a sheet-fed printing machine, at least one of the units 06 is formed by a printing unit 06, in particular an offset printing unit 06, which is preferably followed by one or more coating units 07. If there are several printing units 06, one or more coating units 07 can also be arranged between the printing units 06.

Unless an explicit distinction is made, the term sheet-shaped substrate B, in particular a printing material B, especially sheet B, should in principle be understood to mean any flat substrate B or one in sections, i.e. substrates B that are present in sheet form or in sheet form or possibly plate-shaped, i.e. also Panels or plates to be included. Although the sheet-like substrate B defined in this way or the sheet B can in principle also be formed by sheets B made of cardboard, glass or metal, it is preferably made of paper or plastic film, i. H. as a sheet of paper or plastic.

In such a machine, for conveying and/or guidance purposes, compressed air consumers can be provided at one or more points on the machine or on ancillary units assigned to it, in particular at least at one or more points on the substrate thread compressed air consumers formed by blowing devices, of which some advantageous ones are listed below , but need not be limited to or include them. Individual such compressed air consumers 11; 12; 13; 14 using the preferred example of a sheet-fed printing press.

A compressed air consumer 11 configured as a blower device 11 with one or more blower nozzles or blower openings can thus advantageously be provided on feeder 01, which is applied to a region of a rear side of a stack 09, e.g 09 to support isolation of printing material sheet B to be removed from sheet stack 09. The activation of this blowing device 11 can, for example, be discontinuous, in particular clocked in its cycles correlated to an operating phase of the feeder 01, ie ultimately the machines. During operation of the feeder 01 or the machine, e.g. B. a phase of blowing a phase of suspension and this again a phase of blowing and so on until, for example, the operation of the machine is interrupted for a long time or stopped altogether. Instead or in addition to this - a z. Am 1 not shown, directed to an upper side edge and possibly operated continuously during operation and / or directed to the upper front edge of the stack and z. B. discontinuously operated leading edge blower in the above sense.

On the further transport path, in addition to the above A blower device or, instead, at least one compressed air consumer 12 designed as a blower device 12 and only indicated here can be provided on the system 03 and/or on the swing gripper 04, with z. B. the former supports the process of scaling under and, if necessary, the latter ensures a firm attachment to the support surface.

In addition to one or more of the above compressed air consumers 11; 12, one or more compressed air consumers 13 designed as blowing devices 13 can be provided in the peripheral area of one or more transport cylinders 05, e.g. B. to ensure a smearing-free substrate transport.

Finally, one or more of the above compressed air consumers 11, 12; 13, one or more compressed air consumers 14 provided as blowing devices 14 may be provided in the area of the substrate delivery device 08 in order, for example, to influence the substrate movement, in particular the depositing of sheet-shaped substrates B. Such a blowing device 14 can be formed, for example, by a blowing tube having blowing openings.

Instead or in particular in addition to one or more of the above blowing devices 11; 12; 13; 14 given compressed air consumers can be included as compressed air consumers in the machine or ancillaries installed pneumatic actuators or drives.

To one or more of these - compressed air consumers 11; 12; 13; 14 to supply the machine is a device for compressed air supply 15, in short a compressed air supply 15, assigned to or assigned to it.

Such a compressed air supply 15 comprises, in the line path 16 upstream, one or more compressed air consumers 11 to be supplied with compressed air; 12; 13; 14 a first valve 17, in particular a large-volume, i. H. pressure control valve 17 suitable for a large volume flow, at the outlet of which compressed air can be provided at a pressure Ps, in particular at a desired pressure Ps that is within the adjustment range and is preferably constant - provided, of course, that at least a pressure P corresponding to the desired pressure Ps is present at the inlet. The compressed air supply 15 can also include a plurality of such pressure control valves 17, via which one or more compressed air consumers 11; 12; 13; 14 can be supplied with different operating pressures.

In a first line path upstream of the at least one pressure control valve 17, a first compressor 18 is provided, through which, during operation in a first operating mode of the compressed air supply 15, compressed air at the input of the pressure control valve 17 at the first pressure P1, hereinafter also referred to as operating pressure P1, is discharged via the first line path , is deployable. A pressure-limiting valve 19 can be arranged downstream of the first compressor 18 in the first line path. The first compressor 18 can in principle have any design, but is preferably a low-pressure compressor 18, ie for generating a maximum pressure Pmax of up to 3.0 bar (=3*10 ⁵ Pa) above ambient, in particular up to 2.5 bar designed to generate a maximum pressure Pmax in the range from 1.0 to 2.0 bar above the environment, for example in the form of a fan.

In a second line path upstream of the at least one pressure control valve 17, a compressed air reservoir 21 is provided, through which compressed air of a second pressure P2 can be made available during operation in a second operating mode via the second line path at the input of the pressure control valve 17. A switching valve 22 is arranged downstream of the compressed air reservoir 21 in the second line path, through which the flow path in the second line path between the compressed air reservoir 21 and the pressure control valve 17 can be selectively opened and closed. The compressed air reservoir 21 is preferably set up and designed to supply compressed air with pressures P2 of more than 5.0 bar (=5*10 ⁵ Pa), advantageously of at least 6.0 bar, preferably with pressures P2 of 6.0 bar to 10 0 bar, in particular from 6.0 to 7.0 bar.

The first and second pathways join at a junction upstream of the pressure regulator mechanism of the pressure control valve 17 lying point 23, z. B. junction point 23, which can be located directly at the entrance or, as shown, upstream of the pressure control valve 17 and then includes a line section 24 common to the first and second line path.

In the first line between the junction 23 with the first line and the first compressor 18 is a large-volume, d. H. suitable for a large flow rate, check valve 26 is provided, which closes the flow path upstream of the check valve 26 in the event that downstream of the check valve 26 there is a higher pressure P in the line than upstream. Preferably, a sensor 27, e.g. B. pressure sensor 27, provided by which the pressure P prevailing in the line section between the first compressor 18 and check valve 26 can be determined and preferably as a signal or signal sequence for further use--in particular for control purposes--can be output.

A first sensor 27, e.g. B. pressure sensor 27, provided by which the pressure P1 prevailing in the line section between the first compressor 18 and check valve 26 can be determined and preferably output as a signal or signal sequence for further use.

The check valve 26 therefore separates the line system comprising the first and second line path into a first part I, in which the pressure P always corresponds at most to the pressure that is present in the first line path upstream of the check valve 26, and a second part located downstream of the check valve 26 II, in which a pressure P that is higher than in the first part I can be present. The point 23 at which the first and second conduction paths meet is in the second part II.

In an advantageous embodiment, a second sensor 25, z. g. pressure sensor 25, through which the pressure P present in the line section between compressed air reservoir 21 and switching valve 22 - and when switching valve 22 is open - on the input side of pressure control valve 17 can be determined and preferably output as a signal or signal sequence for further use - in particular for control purposes.

The compressed air reservoir 21 is now from a compressor 18; 28 can be pressurized with compressed air via a line path that is different from the first and second line path and bypasses the junction point 23 and/or the check valve 26, i.e. in particular via a line path that does not go via the junction point 23 and, for example, also not via the first check valve 26 and/or in particular not via the switching valve 22 located in the second line path between the compressed air reservoir 21 and the junction point 23 .

The pressure P2 in the compressed air reservoir 21 in the operational state is preferably at least three times the maximum pressure P1 provided or that can be provided by the first compressor 18 and/or during operation; Pmax. The operating pressure P1 of the first compressor 18 is preferably 1.0 to 2.5 bar, in particular 1.0 to 2.0 bar, while the operating pressure P2 in the compressed air reservoir 21 is 6.0 to 10.0 bar, in particular is 6.0 to 7.0 bar.

The compressed air reservoir 21 is in a first embodiment of the compressed air supply from another, z. B. second compressor 28, in particular a compressor 28 with relatively low power output, can be acted upon by compressed air via a line path provided specifically for this purpose. This second compressor 28 is preferably designed as a compressor 28 that provides a higher pressure at the outlet than the first compressor 18, i. H. for example to provide compressed air at a pressure P2 of at least 5.0 bar, in particular at least 6.0 bar, preferably with pressures P2 of 6.0 bar to 10.0 bar. The second compressor 28 is preferably designed as a compressor. In an advantageous development, a throttle valve 29 with a preferably low volume flow can be provided in the line path between the second compressor 28 and the compressed air reservoir 21, with the aid of which the speed of filling can be controlled and slow filling is possible. The latter helps to avoid sudden pressure drops in the machine's compressed air system and/or strong pressure surges in the compressed air reservoir 21 .

Due to the possibility of filling the compressed air reservoir 21 completely independently of the operation of the first compressor 18 by the second compressor 28, for example, a supply of the compressed air consumers 11; 12; 13; 14 parallel filling or refilling of the compressed air reservoir 21 via the first compressor 18 is possible.

The latter is also in case one is in 3 illustrated embodiment of the compressed air supply 15, which does not belong to the invention, is possible, in which the compressed air reservoir 21 is not filled via a second compressor 28, but from the first compressor 18. For this purpose, an upstream of the check valve 26 from the first lei separate cable path branching off, e.g. B. is provided, which leads into the compressed air reservoir 21 and between the branch 31 from the first line path and the entry into the compressed air reservoir 21 comprises a pressure booster 32 . In addition, the pressure booster 32 in this separate line path can also be associated with or upstream of a check valve, which closes in the event that a higher pressure P prevails in the line downstream of the check valve than upstream. The pressure booster 32 is designed, for example, to at least triple, preferably at least quadruple, the pressure P present on the inlet side. A throttle valve (not shown) that may be provided in the separate line section can be used to simultaneously provide compressed air for the compressed air consumer or consumers 11; 12; 13; 14 and filling up the compressed air reservoir 21, a ratio between the two streams can be set.

The above Check valve 26 ensures, in conjunction with the pressure control valve 17, the smoothest possible volume flow at the compressed air consumer 11; 12; 13; 14. The pressure control valve 17 also ensures that there are very different admission pressures at its input, e.g. B. 1.0 to 2.0 bar on the low-pressure compressor 18 and z. B. 6.0 to 10.0 bar via the compressed air reservoir 21, a constant pressure at the compressed air consumer 11; 12; 13; 14 and the check valve 26 automatic switching between the above high and low pressure. Due to the advantageous embodiment with the sensors 25; 27 allows a targeted switching of the switching valve 22 for specific and preferably definable operating situations.

• In einer statischen Betriebssituation, nämlich einem Ruhezustand, in welchem der oder die angeschlossenen Druckluftverbraucher 11; 12; 13; 14, z. B. eine oder mehrere angeschlossenen Blaseinrichtungen 11; 12, 13, 14, inaktiv sind und durch die Druckluftversorgung 15 keine Druckluft abgegeben wird, ist der Druckluftspeicher 21 mit Druckluft seines erwünschten Betriebsdruckes P2 gefüllt und das Schaltventil 22 geöffnet. Das Rückschaltventil 26 ist infolge des hohen Druckes P2 geschlossen. In diesem Zustand ist der erste Verdichter 18 inaktiv.

In the following, preferred operating modes and operating sequences are presented for different operating situations:

• In a static operating situation, namely a state of rest, in which the one or more connected compressed air consumers 11; 12; 13; 14, e.g. B. one or more connected blowers 11; 12, 13, 14 are inactive and no compressed air is emitted by the compressed air supply 15, the compressed air reservoir 21 is filled with compressed air at its desired operating pressure P2 and the switching valve 22 is opened. The switchback valve 26 is closed due to the high pressure P2. In this state, the first compressor 18 is inactive.

If one or more compressed air consumers 11; 12; 13; 14 is activated, in a start-up phase, operation takes place in an operating mode referred to above as the second operating mode, with the switching valve 22 still open, the supply via the second line path and the pressure control valve 17 from the volume of high operating pressure P2 stored in the second line path and the compressed air reservoir 21, whereby as a result of the increased pressure P in part II of the line system, the check valve 26 initially remains closed. Right at the beginning or at least during this start-up phase, the first compressor 18 is activated and applies compressed air to the upstream part I of the first line path up to the check valve 26 with the operating pressure P1, in particular the maximum pressure P1=Pmax that can be provided. When the operating pressure P1 is reached in part I - e.g. B. detected by the first sensor 27 - the switching valve 22 is closed in the second line, whereupon the pressure P in the second line path downstream of the switching valve 22 degrades by the compressed air extraction and z. B. in the event that an o. separate line path parallel to the pressure reduction in the downstream line section, the compressed air reservoir 21 should be refilled, the pressure P in the compressed air reservoir 21 slowly builds up again to the operating pressure P2.

If the pressure P in the second line path downstream of the switching valve 22 has fallen below the pressure P currently present in the first line path upstream of the check valve 26, which then preferably already corresponds to the desired operating pressure P1, in particular the maximum pressure Pmax, then the valve opens Check valve 26 automatically and the supply of compressed air or consumers 11; 12; 13; 14 via the pressure control valve 17 takes place until further notice in a controlled operation by the first compressor 18 via the first line path.

A refilling of the compressed air reservoir 21 parallel to the pressure build-up in part I and/or parallel to the above-mentioned Supply of the compressed air consumers 11; 12; 13; 14 through the first compressor 18 can in the case of the embodiment according to the invention via the second compressor 28 and in the embodiment not claimed from the first compressor 18 via the pressure booster 32 - possibly with throttling of the volume flow - done.

If the at least one connected compressed air consumer 11; 12; 13; 14 deactivated, i. H. in an operating situation, compressed air is no longer removed from the compressed air supply 15, so with the deactivation of the or all connected compressed air consumers 11; 12; 13; 14, the first compressor 18 can also be switched off if, in the event that the compressed air reservoir 21 is filled from the first compressor 18 via the separate line path, the desired operating pressure P2 has been reached in the compressed air reservoir 21 or at the second sensor 25.

In an advantageous embodiment of the operation of the compressed air supply 15, however, a preferably changeable, for example at least several seconds long delay time period Δt is provided, in which the first compressor 18 despite the deactivated compressed air consumer or consumers 11; 12; 13; 14 remains active. If the or at least one of the connected compressed air consumers 11 is activated again within this period of time; 12; 13; 14, the above-mentioned control operation continues to take place through the first compressor 18 via the first line path and the counter for the run-on time period Δt is reset.

If all of the connected compressed air consumers 11; 12; 13; 14 inactive, then - e.g. B. in the presence or during a reconstruction of the operating pressure P2 in the compressed air reservoir 21 - the switching valve 22 is opened, whereby the check valve 26 closes automatically when the pressure P present in part I in part II is exceeded. If the compressed air reservoir 21 is filled from the first compressor 18 via the separate line path and the desired operating pressure P2 is reached in the compressed air reservoir 21 or at the second sensor 25, the first compressor 18 is switched off. Otherwise, the first compressor 18 can be switched off independently of the pressure P in the compressed air reservoir 21 and the compressed air reservoir 21 can be filled via the second compressor 28 . The compressed air supply is then back to the above mentioned level. hibernation and can be used again at a later point in time via an above-mentioned start-up phase can be transferred to regular operation. In this case, regular operation means operation with a stable supply of the connected compressed air consumer 11; 12; 13; 14 alone via the first compressor 18.

Reference List

01

Substrate feed device, feeder

02

conveyor line

03

System facility, sheet system, system

04

Arch acceleration means, swing grippers

05

transport cylinder

06

Work, stage of processing, printing unit, offset printing unit

07

Plant, processing stage, coating unit

08

Substrate delivery device, sheet delivery, pile delivery

09

Stack, stack of sheets

10

-

11

Compressed air consumers, blowing device

12

Compressed air consumers, blowing device

13

Compressed air consumers, blowing device

14

Compressed air consumers, blowing device

15

Compressed air supply device, compressed air supply

16

conduction path

17

valve, pressure control valve

18

Compressor, first, low-pressure compressor

19

pressure relief valve

20

-

21

compressed air storage

22

switching valve

23

place, union place

24

line section

25

Sensor, second, pressure sensor

26

check valve

27

Sensor, first, pressure sensor

28

compressor, second

29

throttle valve

30

-

31

branch

32

pressure intensifier

B

substrate, substrate, sheet, sheet-like, substrate sheet

P

Print

P1

Pressure, first, operating pressure

p2

Pressure, second, operating pressure

Pmax

Pressure, maximum (18)

p.s

pressure, target pressure

T

transport direction

I

part, first

II

part, second

Claims (12)

Device for supplying compressed air (15) to one or more compressed air consumers (11; 12; 13; 14) of a substrate (B) processing and/or processing machine, comprising - a first valve (17) in a line path (16) upstream of one or more with Consumer (11; 12; 13; 14) to be supplied with compressed air, at whose outlet compressed air of a pressure (Ps) is ready - a first line path, via which compressed air at a first pressure (P1) can be made available to the first valve (17) during operation in a first operating mode from a first compressor (18), - a second line path, via which the first valve (17) during operation in a second operating mode, compressed air at a second pressure (P2) can be made available from a compressed air reservoir (21), - and a check valve (26) in the first line path upstream of a point (23) at which the first and combine a second line path, characterized in that the compressed air reservoir (21) can be charged with compressed air from a further compressor (28) via a line path that is different from the first and second line path and bypasses the junction point (23) and/or the check valve (26), and that the compressor (28) is set up to have a pressure (P max ) that is greater than the maximum pressure (P _max ) to be provided by the first compressor (18). provide higher pressure (P2). device after claim 1 characterized in that a throttle valve (29) is provided between the further compressor (28) and the compressed air reservoir (21). device after claim 1 or 2 , characterized in that a pressure sensor (25) and/or a switching valve (22) is provided in the second line path between the compressed air reservoir (21) and the junction point (23) with the first line path. device after claim 1 , 2 or 3 , characterized in that in the line path upstream of the check valve (26) and downstream of the first compressor (18), a pressure sensor (27) and / or a pressure relief valve (19) is provided. Machine for processing and/or treating sheet-form substrate (B) with a feeder (01), with a sheet feeder (03), with at least one processing stage (06; 07) with at least one transport cylinder (05) and with a sheet delivery (08 ), whereby the feeder (01) and/or the sheet feeder (03) and/or the transport cylinder (05) and/or the sheet delivery (08) has a blowing device (11; 12; 13; 14) configured compressed air consumer (11; 12; 13; 14), wherein one, several or all of the compressed air consumers (11; 12; 13; 14) can be supplied with compressed air by a compressed air supply (15), characterized by the execution of the compressed air supply (15) according to a device according to one of Claims 1 until 4 . Method for supplying compressed air (15) to at least one compressed air consumer (11; 12; 13; 14) of a substrate (B) processing and/or processing machine, using a device according to one of Claims 1 until 4 , wherein the at least one compressed air consumer (11; 12; 13; 14) is supplied with compressed air in a control mode via a first line path from a first compressor (18) providing compressed air at a first pressure (P1) via a pressure control valve (17), characterized in that the at least one compressed air consumer (11; 12; 13; 14) in a start-up phase preceding the control operation, in which the previously inactive first compressor (18) only starts up, via a second, compressed air of a pressure ( P1) higher second pressure (P2) providing compressed air reservoir (21) is supplied with compressed air leading to the pressure control valve (17). procedure after claim 6 , characterized in that the compressed air reservoir (21) at least at the beginning of the start-up phase applies a pressure (P2) to the line path located upstream of the pressure control valve (17) which is at least three times the maximum pressure ( P _max ) and/or which is at least 5 bar above the ambient pressure. procedure after claim 6 or 7 , characterized in that the first compressor (18) is designed as a low-pressure compressor (18) and/or provides an operating pressure (P1) of at most 3.0 bar. procedure after claim 6 , 7 or 8th , characterized in that the compressed air reservoir (21) is supplied with compressed air via a separate Line path with compressed air above the level of the first compressor (18) to be provided maximum pressure (P _max ) lying pressure (P) is applied. procedure after claim 9 , characterized in that the compressed air reservoir (21) is supplied from the first compressor (18) via a pressure booster (32) with compressed air at a pressure (P) above the level of the maximum pressure (P _max ) to be provided by the first compressor (18). will. procedure after claim 10 , characterized in that the compressed air reservoir (21) from a second compressor (28) is pressurized with compressed air above the level of the first compressor (18) maximum pressure (P _max ) lying pressure (P). procedure after claim 6 , 7 , 8th , 9 , 10 or 11 , characterized in that switching between the start-up phase and control operation takes place automatically via a check valve (26) when, after an interruption in the supply of compressed air from the compressed air reservoir (21) to a line section (24) located downstream of the check valve (26), the upstream of the check valve (26) by the first compressor (18) generated pressure (P1) is greater than that downstream of the check valve (26) and/or that after deactivation of the single or all of the compressed air consumers (11; 12; 13; 14) the first compressor (18) is switched off at the earliest after a run-on time period Δt has elapsed.

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