EP0803355B1 - Transfer cylinder - Google Patents
Transfer cylinder Download PDFInfo
- Publication number
- EP0803355B1 EP0803355B1 EP97105982A EP97105982A EP0803355B1 EP 0803355 B1 EP0803355 B1 EP 0803355B1 EP 97105982 A EP97105982 A EP 97105982A EP 97105982 A EP97105982 A EP 97105982A EP 0803355 B1 EP0803355 B1 EP 0803355B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transfer cylinder
- channel
- leading
- recess
- leading edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/085—Cylinders with means for preventing or damping vibrations or shocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
- B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
Definitions
- the invention relates to a transfer cylinder according to the preamble of Claim 1.
- DE 31 25 300 C2 describes a transfer cylinder for a web-fed rotary printing press known, which is equipped with a printing blanket, the ends that can be inserted into an axis-parallel channel are held in this channel, and an elastically deformable peripheral region on the in the direction of rotation of the transfer cylinder leading edge of the channel.
- both ends of the printing blanket are stretched approximately radially in the channel be used to prevent deformation of the elastically deformable Circumferential area by the clamping force acting on the leading end this peripheral area on the channel side through a leading edge forming rigid support element stiffened.
- the invention has for its object a transfer cylinder to create according to the preamble of claim 1, the one hand effective reduction and on the other hand an effective damping of the occurring Channel joints allowed.
- the chamfer in the area of the leading edge of the channel is compensated ensuring a full printout on the substrate up to this edge, above all, one that forms on the latter during operation Bead of the printing blanket so that the impact load is reduced. So that is also a lower load on the leading end of the blanket connected, thereby dispensing with its separate clamping in the channel can be, so that the elastically deformable area of the transfer cylinder in the area of the leading edge as Spring damping element to absorb the remaining channel joints and thus to avoid cylinder vibrations excitable by the latter is usable, the damping effect by the additional Introduction of a vibration-damping material - for example a casting elastomer that cures at room temperature with a Shore Hardness A 80 - 98 - is effectively reinforced in the recess.
- a vibration-damping material for example a casting elastomer that cures at room temperature with a Shore Hardness A 80 - 98 - is effectively reinforced in the recess.
- the associated drawing shows a schematic representation of a transfer cylinder with a leading one not fixed in the channel End of a printing blanket and a trailing one tensioned by means of a tensioning shaft The End.
- a printing blanket 2 is arranged on the circumference of a transfer cylinder 1, whose both ends 3; 4 can be inserted in an axially parallel channel 5 are held, which is in the direction of rotation of the transfer cylinder 1 leading end 3 only by means of a side extension 6 in a Recess 7 of the leading channel surface 8 hooked in and the trailing one End 4 both held and radial by means of a tension shaft 9 is excited.
- Printing unit cylinder in the form of an impression cylinder or forme cylinder is the leading edge 10 of channel 5 with a chamfer 11 and the trailing Edge 12 with a mirror image of the starting chamfer 11 of the same type executed run phase 13 equipped.
- the start chamfer 11 and the drain chamfer 13 are flats on the circumference of the transfer cylinder designed at the leading or trailing edge 10 or 12 each at the greatest distance to the circular Radial contour 14 of the transfer cylinder 1 is reset radially starting with a constant reduction of this distance in the circumferential direction end after a few millimeters on the circumference. So that is on both Edges 10; 12 ensuring a full printout on the Printing material up to these edges is attached to the latter during operation forming bead of the blanket 2 in the sense of a reduction the shock load compensated.
- the transfer cylinder 1 has 10 at the leading edge of the channel 5 an elastically deformable peripheral region B by a slot-shaped recess 15 with respect to the circumference radially inwards displaces the greatest elastic deformability at the leading channel surface 8 effective and begins to grow in the circumferential direction Distance extends to the circumference.
- the shock absorption is further reduced by filling in the recess 15 reinforced with a particularly vibration-damping material.
- a casting elastomer 16 pourable into the recess 15 is which then at room temperature up to a Shore hardness of A 80 to 98 cures, suitable.
- Tension shaft 9 is mounted in a bore 17 which widens the channel 5 inside
- Tension shaft 9 has a radial slot 18 on the circumference, in which the trailing end 4 of after hooking the leading end 3 in the recess 7 with a twist of the transfer cylinder 1 the scope of the printed blanket 2 with the corresponding position of the Clamping shaft 9 can be inserted through the channel opening 19. Then will the trailing end 4 by rotating the tension shaft 9 in the the drawing shown position excited and thus the flexible printing blanket 2 for complete installation with the circumference of the transfer cylinder 1 brought.
- the tension shaft 9 is on its circumference with several in the circumferential direction offset flats 20 to 23 equipped with the appropriate Position of the tension shaft 9, the different functional sequences for the separate insertion of the ends 3; 4 in and securing, fixing or ensure clamping in and removal from channel 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
Description
Die Erfindung betrifft einen Übertragungszylinder nach dem Oberbegriff Von Anspruch 1. The invention relates to a transfer cylinder according to the preamble of Claim 1.
Aus der DE 31 25 300 C2 ist ein Übertragungszylinder für eine Rollenrotations-Druckmaschine bekannt, der mit einem Drucktuch bestückt ist, dessen in einen achsparallelen Kanal einsetzbare Enden in diesem gehalten werden, und einen elastisch verformbaren Umfangsbereich an der in Drehrichtung des Übertragungszylinders vorlaufenden Kante des Kanals besitzt. DE 31 25 300 C2 describes a transfer cylinder for a web-fed rotary printing press known, which is equipped with a printing blanket, the ends that can be inserted into an axis-parallel channel are held in this channel, and an elastically deformable peripheral region on the in the direction of rotation of the transfer cylinder leading edge of the channel.
Da beide Enden des Drucktuches annähernd radial im Kanal gespannt werden, wird zur Verhinderung einer Verformung des elastisch verformbaren Umfangsbereiches durch die am vorlaufenden Ende wirkende Spannkraft dieser Umfangsbereich kanalseitig durch ein die vorlaufende Kante bildendes starres Stützelement versteift. Since both ends of the printing blanket are stretched approximately radially in the channel be used to prevent deformation of the elastically deformable Circumferential area by the clamping force acting on the leading end this peripheral area on the channel side through a leading edge forming rigid support element stiffened.
Damit wird jedoch der angestrebte Effekt einer Reduzierung der Stoßbelastung im Druckbetrieb durch einen mit dem Übertragungszylinder zusammenarbeitenden Druckwerkzylinder eingeschränkt. Außerdem erhöhen die vorgeschlagenen Versteifungsmaßnahmen den Herstellungsaufwand für den Übertragungszylinder. However, this is the desired effect of reducing the impact load in printing operation by a cooperating with the transfer cylinder Printing cylinder limited. They also increase proposed stiffening measures the manufacturing costs for the Transfer cylinder.
In der DE-OS 16 36 312 wird eine Stoßdämpfungseinrichtung ohne Stützelement für einen Übertragungszylinder einer Bogenrotationsdruckmaschine beschrieben. Auf Grund des bei Bogenrotations-Druckmaschinen vorhandenen, bei Rollenrotations-Druckmaschinen hingegen nicht realisierbaren breiten Spannkanals ist eine nahezu tangentiale, die Kanten des Spannkanals nicht belastende Spannung beider Enden des Drucktuches möglich. In DE-OS 16 36 312 a shock absorption device without a support element for a transfer cylinder of a sheet-fed rotary printing press described. Due to the existing in sheet-fed rotary printing machines, in the case of web-fed rotary printing presses, on the other hand, widths that cannot be realized Tension channel is an almost tangential, the edges of the tension channel non-stressful tension possible on both ends of the blanket.
Der Erfindung liegt die Aufgabe zugrunde, einen Übertragungszylinder gemäß dem Oberbegriff von Anspruch 1 zu schaffen, der einerseits eine wirksame Reduzierung und andererseits eine wirksame Dämpfung der auftretenden Kanalstöße ermöglicht. The invention has for its object a transfer cylinder to create according to the preamble of claim 1, the one hand effective reduction and on the other hand an effective damping of the occurring Channel joints allowed.
Die Aufgabe wird durch die kennzeichnenden Merkmale von Anspruch 1 sowie die die Erfindung in vorteilhafter Weise ausgestaltenden Unteransprüche erfüllt. The object is achieved by the characterizing features of claim 1 and the subclaims which advantageously design the invention Fulfills.
Die Anlauffase im Bereich der vorlaufenden Kante des Kanals kompensiert unter Gewährleistung eines vollen Ausdruckes auf dem Bedruckstoff bis zu dieser Kante vor allem eine sich an letzterer im Betriebsfall ausbildende Wulst des Drucktuches, so daß sich die Stoßbelastung verringert. Damit ist auch eine geringere Belastung des vorlaufenden Endes des Drucktuches verbunden, wodurch auf dessen gesondertes Spannen in dem Kanal verzichtet werden kann, so daß der elastisch verformbare Bereich des Übertragungszylinders im Bereich der vorlaufenden Kante uneingeschränkt als Feder-Dämpfungs-Element zur Aufnahme der noch verbleibenden Kanalstöße und damit zur Vermeidung von durch letztere erregbaren Zylinderschwingungen nutzbar ist, wobei der Dämpfungseffekt durch die zusätzliche Einbringung eines schwingungsdämpfenden Materials - beispielsweise eines bei Raumtemperatur aushärtenden Gießelastomers mit einer Shore Härte A 80 - 98 - in die Aussparung wirksam verstärkt wird. The chamfer in the area of the leading edge of the channel is compensated ensuring a full printout on the substrate up to this edge, above all, one that forms on the latter during operation Bead of the printing blanket so that the impact load is reduced. So that is also a lower load on the leading end of the blanket connected, thereby dispensing with its separate clamping in the channel can be, so that the elastically deformable area of the transfer cylinder in the area of the leading edge as Spring damping element to absorb the remaining channel joints and thus to avoid cylinder vibrations excitable by the latter is usable, the damping effect by the additional Introduction of a vibration-damping material - for example a casting elastomer that cures at room temperature with a Shore Hardness A 80 - 98 - is effectively reinforced in the recess.
Die Erfindung wird nachfolgend an einem Ausführungsbeispiel erläutert. Die zugehörige Zeichnung zeigt in schematischer Darstellung einen Übertragungszylinder mit einem nicht spannbar im Kanal fixierten vorlaufenden Ende eines Drucktuches und einem mittels Spannwelle gespannten nachlaufenden Ende. The invention is explained below using an exemplary embodiment. The associated drawing shows a schematic representation of a transfer cylinder with a leading one not fixed in the channel End of a printing blanket and a trailing one tensioned by means of a tensioning shaft The End.
Auf dem Umfang eines Übertragungszylinders 1 ist ein Drucktuch 2 angeordnet, dessen beide Enden 3; 4 in einem achsparallelen Kanal 5 einsteckbar gehalten werden, wobei das in Drehrichtung des Übertragungszylinders 1 vorlaufende Ende 3 lediglich mittels eines seitlichen Ansatzes 6 in eine Aussparung 7 der vorlaufenden Kanalfläche 8 eingehängt und das nachlaufende Ende 4 mittels einer Spannwelle 9 sowohl gehalten als auch radial gespannt ist. A printing blanket 2 is arranged on the circumference of a transfer cylinder 1, whose both ends 3; 4 can be inserted in an axially parallel channel 5 are held, which is in the direction of rotation of the transfer cylinder 1 leading end 3 only by means of a side extension 6 in a Recess 7 of the leading channel surface 8 hooked in and the trailing one End 4 both held and radial by means of a tension shaft 9 is excited.
Zur Verminderung von Kanalstößen im Betriebsfall und damit von die Druckqualität beeinträchtigenden Zylinderschwingungen infolge Überrollens durch einen nicht dargestellten an den Übertragungszylinder 1 angestellten Druckwerkzylinder in Gesalt eines Gegendruck- oder Formzylinders ist die vorlaufende Kante 10 des Kanals 5 mit einer Anlauffase 11 und die nachlaufende Kante 12 mit einer zur Anlauffase 11 spiegelbildlich gleichartig ausgeführten Ablauffase 13 ausgestattet. To reduce channel surges during operation and thus the Cylinder vibrations affecting print quality due to rollover employed by a transfer cylinder 1, not shown Printing unit cylinder in the form of an impression cylinder or forme cylinder is the leading edge 10 of channel 5 with a chamfer 11 and the trailing Edge 12 with a mirror image of the starting chamfer 11 of the same type executed run phase 13 equipped.
Die Anlauffase 11 und die Ablauffase 13 sind als umfangsseitige Abflachungen des Übertragungszylinders gestaltet, die an der vorlaufenden bzw. nachlaufenden Kante 10 bzw. 12 jeweils im größten Abstand zur kreisförmigen Umfangskontur 14 des Übertragungszylinders 1 radial zurückgesetzt beginnend unter einer stetigen Verringerung dieses Abstandes in Umfangsrichtung nach wenigen Millimetern am Umfang enden. Damit wird an beiden Kanten 10; 12 unter Gewährleistung eines vollen Ausdruckes auf dem Bedruckstoff bis zu diesen Kanten eine sich jeweils an letzteren im Betriebsfall ausbildende Wulst des Drucktuches 2 im Sinne einer Reduzierung der Stoßbelastung kompensiert. The start chamfer 11 and the drain chamfer 13 are flats on the circumference of the transfer cylinder designed at the leading or trailing edge 10 or 12 each at the greatest distance to the circular Radial contour 14 of the transfer cylinder 1 is reset radially starting with a constant reduction of this distance in the circumferential direction end after a few millimeters on the circumference. So that is on both Edges 10; 12 ensuring a full printout on the Printing material up to these edges is attached to the latter during operation forming bead of the blanket 2 in the sense of a reduction the shock load compensated.
Außerdem besitzt der Übertragungszylinder 1 an der vorlaufenden Kante 10 des Kanals 5 einen elastisch verformbaren Umfangsbereich B, indem eine schlitzförmige Aussparung 15 gegenüber dem Umfang radial nach innen versetzt an der vorlaufenden Kanalfläche 8 die größte elastische Verformbarkeit bewirkend beginnt und sich in Umfangsrichtung mit stetig wachsendem Abstand zum Umfang erstreckt. In addition, the transfer cylinder 1 has 10 at the leading edge of the channel 5 an elastically deformable peripheral region B by a slot-shaped recess 15 with respect to the circumference radially inwards displaces the greatest elastic deformability at the leading channel surface 8 effective and begins to grow in the circumferential direction Distance extends to the circumference.
Die Dämpfung der Stoßbelastung wird noch durch ein Ausfüllen der Aussparung 15 mit einem besonders schwingungsdämpfenden Material verstärkt. Dazu ist ein in die Aussparung 15 eingießbares Gießelastomer 16, das anschließend unter Raumtemperatur bis zu einer Shore Härte A 80 bis 98 aushärtet, geeignet. The shock absorption is further reduced by filling in the recess 15 reinforced with a particularly vibration-damping material. For this purpose, a casting elastomer 16 pourable into the recess 15 is which then at room temperature up to a Shore hardness of A 80 to 98 cures, suitable.
Die in einer den Kanal 5 im Inneren erweiternden Bohrung 17 gelagerte Spannwelle 9 besitzt umfangsseitig einen radialen Schlitz 18, in den das nachlaufende Ende 4 des nach dem Einhängen des vorlaufenden Endes 3 in die Aussparung 7 unter einer Verdrehung des Übertragungszylinders 1 auf dessen Umfang aufgelegten Drucktuches 2 bei entsprechender Stellung der Spannwelle 9 durch die Kanalöffnung 19 einsteckbar ist. Anschließend wird das nachlaufende Ende 4 durch ein Verdrehen der Spannwelle 9 in die in der Zeichnung dargestellte Stellung gespannt und damit das flexible Drucktuch 2 zur völligen Anlage mit dem Umfang des Übertragungszylinders 1 gebracht. Die Spannwelle 9 ist an ihrem Umfang mit mehreren in Umfangsrichtung versetzten Abflachungen 20 bis 23 ausgestattet, die bei entsprechender Stellung der Spannwelle 9 die verschiedenen Funktionsabläufe für das getrennte Einbringen der Enden 3; 4 in und deren Sicherung, Fixierung bzw. Spannen im sowie Entnahme aus dem Kanal 5 gewährleisten. The is mounted in a bore 17 which widens the channel 5 inside Tension shaft 9 has a radial slot 18 on the circumference, in which the trailing end 4 of after hooking the leading end 3 in the recess 7 with a twist of the transfer cylinder 1 the scope of the printed blanket 2 with the corresponding position of the Clamping shaft 9 can be inserted through the channel opening 19. Then will the trailing end 4 by rotating the tension shaft 9 in the the drawing shown position excited and thus the flexible printing blanket 2 for complete installation with the circumference of the transfer cylinder 1 brought. The tension shaft 9 is on its circumference with several in the circumferential direction offset flats 20 to 23 equipped with the appropriate Position of the tension shaft 9, the different functional sequences for the separate insertion of the ends 3; 4 in and securing, fixing or ensure clamping in and removal from channel 5.
Claims (6)
- Transfer cylinder for a web-fed rotary printing machine, fitted with a printing blanket (2) whose ends (3, 4), which can be inserted into a coaxial channel, are held in this channel by tension of the end (4) trailing in the direction of rotation, and having an elastically deformable circumferential region (B) on the leading edge (10) of the channel, characterised in that the elastic deformability of the circumferential region (B) constantly increases in the circumferential direction, being at its greatest on the leading edge (10), and the leading end (3) of the printing blanket (2) can be fixed in a non-tightenable manner in the channel (5), and arranged on the circumferential side of the leading edge (10) is a run-in chamfer which is set back, constantly increasing in the circumferential direction, at a maximum radial distance with respect to the circular circumferential contour (14) of the transfer cylinder (1) at the leading edge (10).
- Transfer cylinder according to claim 1, characterised in that the transfer cylinder (1) is fitted with a recess (15) beginning at a radial distance from the circumference on the leading channel surface (8) and extending in the circumferential direction with constantly increasing radial spacing from the circumference.
- Transfer cylinder according to claim 2, characterised in that the recess (15) is filled with an oscillation-damping material.
- Transfer cylinder according to claim 3, characterised in that the material comprises a cast elastomer (16) which hardens at room temperature and has a Shore A hardness of 80 to 98.
- Transfer cylinder according to claim 1 to 4, characterised in that the trailing edge (12) of the channel (5) is provided with a run-out chamfer (13) which is similar to the run-in chamfer (11) of the leading edge (10) and extends in mirror-image fashion in the opposite circumferential direction, this run-out chamfer being set back on the trailing edge (12) at a maximum radial distance with respect to the circular circumferential contour (14).
- Transfer cylinder according to claim 1 to 5, characterised in that the leading end (3) of the printing blanket (2) can be hooked in by means of a lateral shoulder (6) into a recess (7) of the leading channel surface (8) acting as an abutment, and the trailing end (4) of the printing blanket can be clamped by means of a clamping shaft (9) arranged in a bore (17) of the channel (5) and fitted with a slot (18) receiving the trailing end (4), with a lateral contact ensuring that the shoulder (6) of the leading end (3) remains in the recess (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19616338 | 1996-04-24 | ||
| DE19616338A DE19616338A1 (en) | 1996-04-24 | 1996-04-24 | Transfer cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0803355A1 EP0803355A1 (en) | 1997-10-29 |
| EP0803355B1 true EP0803355B1 (en) | 1999-11-10 |
Family
ID=7792289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97105982A Expired - Lifetime EP0803355B1 (en) | 1996-04-24 | 1997-04-11 | Transfer cylinder |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0803355B1 (en) |
| DE (2) | DE19616338A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006044979A1 (en) * | 2006-09-23 | 2008-04-10 | Man Roland Druckmaschinen Ag | Printing unit used in reel-fed press machine, has forming cylinder, transmission cylinder and impression cylinder arranged with spanning channels to ensure compression between the cylinders |
| DE102006058667B3 (en) * | 2006-12-13 | 2008-02-07 | Koenig & Bauer Aktiengesellschaft | Impression cylinder for web offset printing machine, has vibration damping unit arranged in region of bearer ring, where vibration damping unit includes vibration damping bearing of bearer ring |
| DE102007006042B3 (en) * | 2007-02-07 | 2008-09-18 | Koenig & Bauer Aktiengesellschaft | Blanket i.e. textile printing blanket, clamping method for printing machine, involves clamping ends of blanket by clamping spindle, and holding end section in prestressed-position after being released by clamping spindle within hollow space |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3589285A (en) * | 1970-01-20 | 1971-06-29 | Harris Intertype Corp | Cylinder with yieldable periphery |
| DE2613688C2 (en) * | 1976-03-31 | 1983-05-26 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | Blanket cylinder for a sheet-fed rotary offset printing machine |
| DE2613687B2 (en) * | 1976-03-31 | 1979-05-31 | Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg | Gununi cloth cylinder of a web-fed rotary offset printing machine with a flat on the clamping channel |
| DD204886A1 (en) * | 1982-05-05 | 1983-12-14 | Victor Hefftler | ROTARY PRINTING PRESS |
| SE455848B (en) * | 1983-01-21 | 1988-08-15 | Wifag Maschf | RUBBER CYLINDER FOR ROLLING PRESSURE MACHINERY |
| US4635550A (en) * | 1985-03-11 | 1987-01-13 | American Roller Company | Gap filler blanket for printing cylinder |
-
1996
- 1996-04-24 DE DE19616338A patent/DE19616338A1/en not_active Withdrawn
-
1997
- 1997-04-11 DE DE59700676T patent/DE59700676D1/en not_active Expired - Fee Related
- 1997-04-11 EP EP97105982A patent/EP0803355B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19616338A1 (en) | 1997-10-30 |
| EP0803355A1 (en) | 1997-10-29 |
| DE59700676D1 (en) | 1999-12-16 |
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