EP1098768B1 - Printing unit with synchronised control for rotary or flat silk-screen printing machines - Google Patents
Printing unit with synchronised control for rotary or flat silk-screen printing machines Download PDFInfo
- Publication number
- EP1098768B1 EP1098768B1 EP99922162A EP99922162A EP1098768B1 EP 1098768 B1 EP1098768 B1 EP 1098768B1 EP 99922162 A EP99922162 A EP 99922162A EP 99922162 A EP99922162 A EP 99922162A EP 1098768 B1 EP1098768 B1 EP 1098768B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing unit
- cylinder
- printing
- unit according
- spindles
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
- B41F15/0804—Machines for printing sheets
- B41F15/0809—Machines for printing sheets with cylindrical or belt-like screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/004—Electric or hydraulic features of drives
- B41F13/0045—Electric driving devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
- B41F15/0831—Machines for printing webs
- B41F15/0836—Machines for printing webs by means of cylindrical screens or screens in the form of endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
- B41P2213/70—Driving devices associated with particular installations or situations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2213/00—Arrangements for actuating or driving printing presses; Auxiliary devices or processes
- B41P2213/70—Driving devices associated with particular installations or situations
- B41P2213/72—Driving devices for monocolour presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
- B41P2215/00—Screen printing machines
- B41P2215/10—Screen printing machines characterised by their constructional features
- B41P2215/11—Registering devices
Abstract
Description
- figure 1 shows schematically a lateral view of a printing unit for rotary, frame silk-screen printing machines, according to the present invention; and
- figure 2 is a view in cross-section along line II-II of figure 1, according to the present invention.
During the printing operation, the torque values applied to the two
Claims (12)
- Printing unit with synchronised control for rotary, frame or cylinder (20) silk-screen printing machines, comprising a cylinder (20), which can print imprints of colour onto pre-determined areas of a substrate which is advanced on a conveyor line or belt (40) along a direction which is substantially perpendicular to an axis of rotation of the said cylinder (20), the said cylinder (20) being rotated by at least one electric motor (60), by means of at least one spindle (50), which actuates a drive belt (10) connected to the said cylinder (20), characterised in that the said printing unit comprises two spindles (50), each of which is connected directly to an electric motor (60), such that the said spindles (50) remain free from one another, and can rotate with phase displacement relative to one another by a specific variable angular value.
- Printing unit according to claim 1, characterised in that each spindle (50) drives a ring (30) of the said cylinder (20), by means of the said drive belt (10).
- Printing unit according to claim 1, characterised in that each spindle (50) is controlled by means of a brushless-type electric motor (60), which is connected to an epicycloidal reduction gear (70) with reduced play, which transmits the motion to the said cylinder (20), by means of pulleys (80) and ball bearings with a small cross-section.
- Printing unit according to claims 1 and 3, characterised in that the said electric motor (60) is controlled by digital drive means, which is actuated by an angular transducer device which is integrated in each motor (60).
- Printing unit according to claims 1 and 4, characterised in that the said digital drive means control the speed of the said electric motors (60) in a closed loop, and are in turn controlled by cards, which are integrated in a PLC, for controlling the axis of rotation of the said cylinders (20), which belong to a plurality of printing units present on a rotary machine.
- Printing unit according to claims 4 and 5, characterised in that the said control cards, which are actuated by a signal obtained from the said transducer device, control the position of the electric motors (60) in a closed loop.
- Printing unit according to claims 4 and 5, characterised in that the said control cards consist of microprocessors, which perform a control algorithm of the PID type, by means of an applicative programme for electronic processors.
- Printing unit according to claim 7, characterised in that, according to the operative methods of the said rotary machine, the said microprocessors function in a tracking mode or in a positioning mode.
- Printing unit according to claims 1 and 8, characterised in that, during the printing step, the said tracking mode consists of the fact that the said electric motors (60) track a reference in a position which is obtained from an incremental transducer device fitted to a control motor of the said conveyor belt (40).
- Printing unit according to claim 9, characterised in that commands for manual correction of the phase displacement are active, such as to add or subtract a fixed angular speed value to or from the momentary angular speed value of the electric motor (60), for the duration of the said commands.
- Printing unit according to claims 1 and 8, characterised in that, during the step of preparation of the said rotary machine, the said positioning method consists of an operation of searching for an initial, unambiguous reference position for each of the said spindles (50), in order to put the said two spindles (60) into phase with one another, the said initial position being detected by an optoelectronic transducer device, which is integrated in the said spindle (60).
- Printing unit according to claims 1 and 11, characterised in that the said operation of searching for an initial reference position is followed by an operation of automatic positioning of the said rotary machine, consisting of searching for positions of phase displacement of one of the said spindles (60) relative to the other, and of the said two spindles (60) relative to other printing units, the said positioning taking place on the basis of positions stored in a previous repetition of a single processing operation, or of theoretical positions obtained from geometric characteristics of the said cylinders (20) used for the processing.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI980854 | 1998-04-22 | ||
IT1998MI000854A IT1303912B1 (en) | 1998-04-22 | 1998-04-22 | SYNCHRONIZED CONTROL PRINTING UNIT FOR ROTARY MACHINES AQUADRI OR SCREEN PRINTING CYLINDERS |
PCT/EP1999/003009 WO1999054138A1 (en) | 1998-04-22 | 1999-04-16 | Printing unit with synchronised control for rotary or flat silk-screen printing machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1098768A1 EP1098768A1 (en) | 2001-05-16 |
EP1098768B1 true EP1098768B1 (en) | 2002-08-21 |
Family
ID=11379865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99922162A Expired - Lifetime EP1098768B1 (en) | 1998-04-22 | 1999-04-16 | Printing unit with synchronised control for rotary or flat silk-screen printing machines |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1098768B1 (en) |
AT (1) | ATE222536T1 (en) |
AU (1) | AU3930699A (en) |
DE (1) | DE69902593T2 (en) |
IT (1) | IT1303912B1 (en) |
WO (1) | WO1999054138A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1307658B1 (en) * | 1999-02-01 | 2001-11-14 | Aisa Spa | ROTARY SCREEN PRINTING MACHINE FOR FLAT SHEETS SYNCHRONIZATION CONTROL BETWEEN THE ROTATION OF THE PRINT SCREEN AND |
ES2203303B1 (en) * | 2001-11-29 | 2005-02-16 | Rafael Pascual Bernabeu | MACHINE TO CALENDAR, STAMP, LOCK, RECORD AND BRUSH SIMULTANEOUSLY. |
JP6592692B2 (en) * | 2015-07-30 | 2019-10-23 | デュプロ精工株式会社 | Stencil printing machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE383488B (en) * | 1971-01-21 | 1976-03-15 | Reggiani Spa | APPARATUS FOR CARPING AND DRIVING CYLINDRICAL TABLES IN A PRINTING MACHINE. |
-
1998
- 1998-04-22 IT IT1998MI000854A patent/IT1303912B1/en active
-
1999
- 1999-04-16 EP EP99922162A patent/EP1098768B1/en not_active Expired - Lifetime
- 1999-04-16 DE DE69902593T patent/DE69902593T2/en not_active Expired - Lifetime
- 1999-04-16 AU AU39306/99A patent/AU3930699A/en not_active Abandoned
- 1999-04-16 WO PCT/EP1999/003009 patent/WO1999054138A1/en active IP Right Grant
- 1999-04-16 AT AT99922162T patent/ATE222536T1/en active
Also Published As
Publication number | Publication date |
---|---|
AU3930699A (en) | 1999-11-08 |
WO1999054138A1 (en) | 1999-10-28 |
IT1303912B1 (en) | 2001-03-01 |
ITMI980854A1 (en) | 1999-10-22 |
EP1098768A1 (en) | 2001-05-16 |
DE69902593D1 (en) | 2002-09-26 |
ATE222536T1 (en) | 2002-09-15 |
DE69902593T2 (en) | 2003-07-03 |
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