WO2022048933A1 - Vorrichtung zum spannen eines bogenförmigen walzenbezugs um eine walze - Google Patents
Vorrichtung zum spannen eines bogenförmigen walzenbezugs um eine walze Download PDFInfo
- Publication number
- WO2022048933A1 WO2022048933A1 PCT/EP2021/073261 EP2021073261W WO2022048933A1 WO 2022048933 A1 WO2022048933 A1 WO 2022048933A1 EP 2021073261 W EP2021073261 W EP 2021073261W WO 2022048933 A1 WO2022048933 A1 WO 2022048933A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- rail
- axis
- clamping
- rotation
- Prior art date
Links
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
- B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
- B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
- B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface
Definitions
- the present invention relates to a device according to the preamble of claim 1 for tensioning an arcuate roll cover around the lateral surface of a rotatable roll.
- EP0401500A2 discloses a device for adjusting and tensioning flexible printing plates on the plate cylinder of rotary printing presses.
- a pair of slide rails is oriented parallel to the axis of rotation of the plate cylinder.
- the tensioning rails extend almost over the entire length of the plate cylinder and are pivotably mounted on the cylinder body by levers. This makes it possible to correct angular errors in the printed image by slightly shifting the printing plate on the plate cylinder.
- Pressing the roll cover into an undersized receiving groove requires a great deal of force and makes it difficult to remove the roll cover.
- the force required significantly increases the risk of damage to the roller, especially when hammers are used as an aid.
- a concave expansion of the pressure plate can be compensated for with a split tensioning rail described in DE102010045036A1.
- the clamping rail is divided into several segments in the axial direction, which can be individually subjected to a clamping force.
- a successive hanging of the Roll cover in the partial rail with each immediately subsequent tensioning can make handling easier when mounting, but leads to undesirable non-uniform expansion of the roll cover.
- the sequence of the individual tensioning processes influences the elongation and thus the printed image.
- a tensioning device for tensioning a roll cover over a lateral surface of a rotatable roller, wherein the roller can be a printing cylinder and the roller cover can be a printing plate, which has a pair of tensioning rails parallel to the axis of rotation of the roller on the lateral surface of the roller.
- the tensioning rails each form an undercut in the form of a groove into which the leading edge or the trailing edge of the roll cover can be hung.
- the second tensioning rail of the pair is composed of several identical sub-rails.
- Each of these partial rails is mounted on the carriage of a clamping unit.
- the carriages can each be moved with one of the partial rails essentially in the circumferential direction.
- the carriage positions determine the distance between their partial rails and the first tensioning rail of the pair and thus the tension of the roll cover.
- each clamping unit is equipped with a separate drive acting on the respective carriage.
- the tensioning device includes a lock associated with the second tensioning rail.
- the lock is arranged in relation to the second tensioning rail in such a way that, when the roller cover is not tensioned in its closed arrangement, it prevents the roller cover from accidentally slipping out of the receptacle Section rail secures and releases the roll covering relative to the respective section rail in its open arrangement.
- a common switch is preferably assigned to each of these separate tensioning drives. This makes it possible to activate the clamping units individually. For example, when using a narrow roll cover, tensioning units that are not required can be switched off. In addition, if necessary, a wide roll cover can be stretched or distorted non-uniformly in a targeted manner by switching off individual tensioning units.
- the lock is preferably designed as a lever with an axis of rotation in such a way that the legs of the lever can be moved in a plane oriented essentially tangentially to the roll shell.
- the lock is particularly advantageously mounted on the carriage of a tensioning unit and assigned to the sub-rail of this tensioning unit.
- An arrangement of a plurality of identical clamping units on a common pivoting beam with a pivoting axis arranged essentially radially to the roller is advantageous. Angular errors in the roll cover can be corrected by swiveling this bar.
- An infeed device with a controllable actuator is preferably assigned to the swivel beam. In this way, angular errors in the roll cover can be corrected automatically without manual intervention.
- Cam control of the pivoting movement by a cam roller rolling on a cam is particularly advantageous.
- a desired course of force for the pivoting can be set by the design of the curve.
- the infeed device preferably comprises a push rod which is guided into the roller through a hollow shaft.
- the movement-sensitive drive elements in particular can be arranged fixed to the frame outside of the roller.
- FIG. 2 simplified perspective detail view of an infeed device for pivoting a clamping device
- FIG. 4 shows a simplified view of a clamping unit in different states; 5 simplified perspective detail view of a tensioning device;
- FIG. 6 simplified perspective detail view of a tensioning unit; Fig. 7 Switching logic of locking a clamping device.
- a pressure cylinder 1 with a clamping device 2 according to the invention is shown in FIG.
- the lateral surface 103 of the central cylinder 10 has a channel 17 pierced through it. This channel 17 extends in the axial direction y, parallel to the axis of rotation 100 of the printing cylinder 1 and accommodates the clamping device 2 .
- the printing cylinder is mounted in the machine frame 5 via shaft shoulders 16 arranged on both sides of the central cylinder 10 , as shown in FIG.
- a first tensioning rail 11 and a second tensioning rail 12 together form a pair of tensioning rails of the tensioning device 2 .
- the tensioning rails 11 , 12 are oriented parallel to one another axially on the lateral surface 103 of the cylinder 10 . In the circumferential direction, they have a variable distance 70 from one another.
- the first tensioning rail 11 and the second tensioning rail 12 each form an undercut 45 in the form of a groove open in the circumferential direction of the cylinder 10 . The openings of these two grooves face each other.
- the printing plate can be hung in it at its leading or trailing edge. By narrowing the distance 70 between the two tensioning rails 11 , 12 , the suspended printing block is tensioned and thus fixed on the cylinder 10 .
- the pair of clamping rails is attached to a beam 13 of the clamping device 2 .
- This bar 13 runs in the axial direction y in the channel 17 of the pressure cylinder 1 . It is mounted pivotably about an axis 101 running radially to the printing cylinder 1 . Slight pivoting 202 of the tensioning rails 11, 12 about the radial axis 101 allows the angular position of the printed image to be corrected.
- An infeed device 3 is provided for this correction.
- the infeed device 3 comprises a controllable positioning drive 34. This positioning drive 34 communicates with a controller 6 via data lines 60.
- the positioning drive 34 acts via a gear that penetrates axially through a hollow shaft 16 of the printing cylinder 1 on the pivotable beam 13 of the clamping device 2
- the arm 37 of the feed device 3 connected to this push rod 36 penetrates an end face 104 of the central cylinder 10 and engages in the channel 17 of the pressure cylinder 1.
- the arm 37 is mounted in the channel 17 by means of a linear guide 33.
- the linear guide 33 is oriented parallel to the axis of rotation 100 of the printing cylinder 1 and allows the arm 37 an axial linear movement 201 .
- the cam roller 31 interacts with a cam 30 of the swivel bar 13 .
- the bar 13 is supported with a compression spring 32 against the channel 17 in such a way that it is always in contact with the cam roller 31 of the infeed device 3 .
- Linear displacement 201 of arm 37 causes its cam roller 31 to roll on cam 30 of beam 13, thereby causing its pivoting movement 202 about its pivot axis 101.
- the second tensioning rail 12 is composed of a plurality of sections 44 arranged one behind the other in the axial direction y. Each of these partial rails 44 is part of one of several similar clamping units 4. The structure of such a clamping unit is shown in FIGS.
- the clamping unit 4 consists of a clamping carriage 40. This clamping carriage 40 is held by a linear guide 43 on the swivel beam 13 of the clamping device 2 and carries one of the partial rails 44.
- the linear guide 43 is oriented essentially radially to the central cylinder 10 of the printing cylinder 1 and determines the direction of the linear clamping movement 200. For this purpose, it comprises two mutually parallel guide rails.
- the clamping slide 40 of the clamping unit 4 is actuated by a separate drive. This drive moves the slide between the two end positions. The end position in which the printing plate is stretched is shown in Fig. 4a. Compression springs 41 hold the clamping carriage 40 in this end position and apply the clamping force to the partial rail 44 . In order to relax the pressure plate, the compression springs 41 are overridden by a pneumatic cylinder 42, so that the clamping carriage 40 assumes the other end position, as shown in FIGS. 4b-d.
- Each clamping unit 40 has a separate switch 38 for driving it. This switch 38 can easily be a manually operated valve, which is not shown in the figures. In this way, individual clamping units 40 can be switched on or off. For automated actuation of the clamping units 40, the pressure lines of the individual clamping units 40 are combined to form a central pressure line, as shown in FIG. The common valve and the respective separate valve are arranged in relation to one another in the manner of an AND circuit.
- Each tensioning unit 40 includes a first lock 50 which is assigned to the first tensioning rail 11 . This is arranged opposite the groove of the first tensioning rail 11 that accommodates the printing plate and is designed to release the receptacle for changing the printing plate and to lock it for tensioning the printing plate.
- this first lock 50 is mounted on the swivel beam 13 of the tensioning device 2 and can assume a closed position 301 shown in FIGS. 4a-c and an open position 300 shown in FIG. 4d.
- the first lock 50 is designed in the form of a lever 53 with two legs 61, 62 arranged at right angles to one another. It is accommodated in a rotary bearing 54 of the carriage 40 such that it can be pivoted about an axis that is radial to the printing cylinder. In its closed position 301, the first leg 61 of the first lock 50 is aligned parallel to the first tensioning rail 11. the The opening width 71 between the first tensioning rail 11 and the first lock 50 is small, so that an inserted printing block is reliably prevented from slipping out.
- the second leg 62 points in the direction of the second tensioning rail 12 and the second contact surface 52 located on its back is held by a magnet 55 .
- the second leg 62 of the first lock 50 In its open position 301, the second leg 62 of the first lock 50 is oriented parallel to the first tensioning rail.
- the opening width 71 is larger than in the closed position 301, so that the printing block can be easily hung in or removed.
- the first leg 61 points to the second tensioning rail 12 and is held by the magnet 55 via the first contact surface 51 arranged on its rear side.
- a handle 57 mounted on the lever 53I above the pivot bearing 54 is provided.
- a second lock 58 of each tensioning unit 4 is arranged opposite on the respective tensioning carriage 40 and the receiving groove of the associated sub-rail. In terms of its function and structure, it corresponds to the first lock 50 and is therefore not explained further.
- the clamping device 2 has a multiplicity of clamping units 40 identical to those described, which are arranged on the common swivel beam 13 .
- FIGS. 4a-d The individual states of an individual clamping unit 4 when changing and clamping a printing block are shown in FIGS. 4a-d.
- the printing block itself is not shown.
- 4a begins with the tensioned state in which the cliché is tensioned and both locks 50, 58 are held in their closed position 301, respectively. If the separate valve is open, the pneumatic cylinder 42 overrides the tension spring 41 when the common multi-way valve is opened, so that the carriage 40 moves into the end position shown in FIG. 4b. The distance 70 between the clamping rails 11, 12 is increased and a suspended printing block is relaxed.
- the opening of the second lock 58 according to FIG. 4c releases a first edge of the printing block so that it can be unwound from the printing cylinder. Is also the first lock in its open position 300, as shown in Fig. 4d, the printing plate can be completely removed.
- a cliché is applied and stretched in reverse order.
Landscapes
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21769090.8A EP4208345B1 (de) | 2020-09-04 | 2021-08-23 | Vorrichtung zum spannen eines bogenförmigen walzenbezugs um eine walze |
CN202180057290.1A CN116034034A (zh) | 2020-09-04 | 2021-08-23 | 用于绕辊张紧弧形的辊覆盖物的装置 |
US18/044,011 US11945210B2 (en) | 2020-09-04 | 2021-08-23 | Device for mounting a sheet-like roller cover on a roller |
JP2023515135A JP2023539784A (ja) | 2020-09-04 | 2021-08-23 | ローラの周りにシート状のローラ被覆体を締め付ける装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020123196.2 | 2020-09-04 | ||
DE102020123196.2A DE102020123196A1 (de) | 2020-09-04 | 2020-09-04 | Vorrichtung zum Spannen eines bogenförmigen Walzenbezugs um eine Walze |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022048933A1 true WO2022048933A1 (de) | 2022-03-10 |
Family
ID=77710744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/073261 WO2022048933A1 (de) | 2020-09-04 | 2021-08-23 | Vorrichtung zum spannen eines bogenförmigen walzenbezugs um eine walze |
Country Status (6)
Country | Link |
---|---|
US (1) | US11945210B2 (de) |
EP (1) | EP4208345B1 (de) |
JP (1) | JP2023539784A (de) |
CN (1) | CN116034034A (de) |
DE (1) | DE102020123196A1 (de) |
WO (1) | WO2022048933A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4688483A (en) * | 1984-03-15 | 1987-08-25 | Heidelberger Druckmaschinen Ag | Clamping device for a printing plate of an offset printing machine |
US4831931A (en) * | 1987-08-25 | 1989-05-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for tensioning a flexible printing plate on a plate cylinder of a rotary printing machine |
EP0401500A2 (de) | 1989-06-03 | 1990-12-12 | Heidelberger Druckmaschinen Aktiengesellschaft | Vorrichtung zum Verstellen von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen |
US5488904A (en) * | 1993-12-04 | 1996-02-06 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for pivotably adjusting flexible printing plates on the plate cylinder of a rotary printing machine |
DE102010045036A1 (de) | 2010-09-10 | 2012-03-15 | Heidelberger Druckmaschinen Ag | Einrichtung zum Befestigen einer Druckplatte an einem Formzylinder einer Druckmaschine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT324361B (de) * | 1973-03-01 | 1975-08-25 | Heidelberger Druckmasch Ag | Vorrichtung zum aufspannen biegsamer druckplatten |
DE4223328C2 (de) | 1992-07-16 | 1994-05-19 | Roland Man Druckmasch | Vorrichtung zum Befestigen von Druckplatten auf dem Plattenzylinder von Druckmaschinen, insbesondere Bogenoffsetdruckmaschinen |
DE4314436C2 (de) | 1993-05-03 | 1996-08-22 | Roland Man Druckmasch | Spannschiene für den Plattenzylinder einer Druckmaschine, insbesondere Bogenoffsetdruckmaschine |
DE4326250C2 (de) * | 1993-08-05 | 1996-05-15 | Koenig & Bauer Albert Ag | Spannvorrichtung in einer Rotationsdruckmaschine |
DE19515843C1 (de) * | 1995-04-29 | 1996-06-27 | Heidelberger Druckmasch Ag | Vorrichtung zum Spannen einer Druckplatte auf einem Plattenzylinder von Rotationsdruckmaschinen |
DE19634947C1 (de) * | 1996-08-29 | 1998-01-08 | Roland Man Druckmasch | Justiervorrichtung für Druckplatten |
IL120959A (en) * | 1997-05-30 | 2001-09-13 | Creoscitex Corp Ltd | Dynamic latches for plating plates with an outer drum |
DE10119407A1 (de) * | 2000-05-12 | 2001-11-15 | Heidelberger Druckmasch Ag | Vorrichtung zur Schrägkorrektur von Druckplatten auf dem Plattenzylinder einer Rotationsdruckmaschine |
DE102014218839B4 (de) | 2014-09-18 | 2017-06-29 | Koenig & Bauer Ag | Vorrichtung zum Anpassen eines Zylinderaufzugs an eine Bedruckstoffänderung in einer Druckmaschine |
-
2020
- 2020-09-04 DE DE102020123196.2A patent/DE102020123196A1/de active Pending
-
2021
- 2021-08-23 WO PCT/EP2021/073261 patent/WO2022048933A1/de active Application Filing
- 2021-08-23 US US18/044,011 patent/US11945210B2/en active Active
- 2021-08-23 CN CN202180057290.1A patent/CN116034034A/zh active Pending
- 2021-08-23 EP EP21769090.8A patent/EP4208345B1/de active Active
- 2021-08-23 JP JP2023515135A patent/JP2023539784A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4688483A (en) * | 1984-03-15 | 1987-08-25 | Heidelberger Druckmaschinen Ag | Clamping device for a printing plate of an offset printing machine |
US4831931A (en) * | 1987-08-25 | 1989-05-23 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for tensioning a flexible printing plate on a plate cylinder of a rotary printing machine |
EP0401500A2 (de) | 1989-06-03 | 1990-12-12 | Heidelberger Druckmaschinen Aktiengesellschaft | Vorrichtung zum Verstellen von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen |
US5488904A (en) * | 1993-12-04 | 1996-02-06 | Heidelberger Druckmaschinen Aktiengesellschaft | Device for pivotably adjusting flexible printing plates on the plate cylinder of a rotary printing machine |
DE102010045036A1 (de) | 2010-09-10 | 2012-03-15 | Heidelberger Druckmaschinen Ag | Einrichtung zum Befestigen einer Druckplatte an einem Formzylinder einer Druckmaschine |
Also Published As
Publication number | Publication date |
---|---|
CN116034034A (zh) | 2023-04-28 |
US20240025169A1 (en) | 2024-01-25 |
US11945210B2 (en) | 2024-04-02 |
EP4208345B1 (de) | 2024-06-26 |
JP2023539784A (ja) | 2023-09-19 |
EP4208345A1 (de) | 2023-07-12 |
DE102020123196A1 (de) | 2022-03-10 |
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