WO1994018008A1 - Verfahren zur steuerung einer siebdruckzylindermaschine - Google Patents
Verfahren zur steuerung einer siebdruckzylindermaschine Download PDFInfo
- Publication number
- WO1994018008A1 WO1994018008A1 PCT/DE1994/000043 DE9400043W WO9418008A1 WO 1994018008 A1 WO1994018008 A1 WO 1994018008A1 DE 9400043 W DE9400043 W DE 9400043W WO 9418008 A1 WO9418008 A1 WO 9418008A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- printing
- carriage
- screen
- printing cylinder
- cylinder
- Prior art date
Links
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
- B41F15/0813—Machines for printing sheets with flat screens
- B41F15/0827—Machines for printing sheets with flat screens with a stationary squeegee and a moving screen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
Definitions
- the invention relates to a method for controlling a screen printing cylinder machine, wherein during the printing process a printing cylinder receiving the printing material and driven by a drive motor and a screening carriage traveling over it are moved with synchronized speed with the squeegee lowered onto the screen stencil.
- the invention further relates to a screen printing cylinder machine with a printing cylinder receiving the printing material and driven by a drive motor, a screen trolley traveling over it, a printing squeegee which can be lowered onto the screen stencil and a device for synchronizing the movement of the printing cylinder and the screen frame during the printing process the method described above works.
- the first method makes use of a so-called oscillating cylinder, which has a single toothed wheel on each end face, which is permanently in engagement with the toothed rack attached to the corresponding side of the screening carriage. After the printing process, the cylinder reverses into the starting position in which it receives the next print item, the printing process immediately beginning again.
- a disadvantage of this method is that the oscillating cylinder changes from a rotary movement into the opposite direction without a rest, so that the newly fed printing material must be grasped by the printing cylinder immediately. It happens that the print material is not placed correctly or not optimally on the printing cylinder, which impairs the print quality.
- the second known method tries to avoid this disadvantage in that the synchronization between the printing cylinder and the screening carriage takes place during the forward and reverse travel via two gearwheels on each end face of the printing cylinder.
- the first gearwheel engages with the toothed rack arranged on the relevant side of the screening carriage during the printing process (advance).
- this toothed wheel and the toothed rack are decoupled by the teeth being cut out at the appropriate point on the toothed wheel by milling.
- the rack can run back freely through the stopped gear.
- the return of the screening carriage is effected by a second gear, which is brought into engagement with the toothed rack arranged on the relevant side of the screening carriage during the return. During the return, the first gear is held in place by mechanical means.
- the first gear After returning, the first gear is rotated again and brought into engagement with the rack of the screening carriage, whereby a new printing process begins.
- the two gears are driven by a drive motor. Since the printing cylinder coupled to the first gearwheel always rotates in the same direction and stops during the return of the screening carriage, the printed matter can be applied to the printing cylinder for a sufficient period of time with a corresponding printing speed.
- a disadvantage of the second method is the technically very complex mechanical synchronization of the two gears. This also leads to a correspondingly high one Repair requirement and relatively frequent maintenance of the screen printing cylinder machine.
- the printing speed is restricted by the mechanics. Every increase in the printing speed also leads to a reduction in the downtime of the printing cylinder during the return of the screen carriage, which impairs the exact application of the printing material to the printing cylinder. Overall, the economy of the two methods is very unsatisfactory due to the disadvantages described.
- the present invention has for its object to provide a method for controlling a screen printing cylinder machine, which is characterized by a high print quality and great economy by simple technical means and high printing speeds. It is a further object of the present invention to provide a corresponding screen printing cylinder machine with the advantages mentioned above.
- the printing cylinder and the screening carriage are driven independently of one another and the drive motor of the screening carriage is decoupled from the movement of the screening carriage synchronized with the printing cylinder during the printing process and then the screening carriage during the return drives, whereby the pressure cylinder is brought to a standstill before the end of the return.
- the drive motor of the screening carriage is brought to a standstill during the printing process and the drive motor of the printing cylinder before the return of the screening carriage has ended.
- the drive motor of the printing cylinder which is at a standstill before the return has ended, holds the printing cylinder in this position during this time in which the printing material is applied.
- the printing cylinder and the screen carriage are driven independently of one another, data for setting the printing path and the printing speed are programmed into an electronic control device, stored therein and processed into control signals for the drives and the The respective movement positions of the printing cylinder and of the screen carriage during the printing process are determined by position measuring systems and further processed in the electronic control device for regulating the control signals.
- the above-mentioned advantages are also achieved with this method according to the invention.
- the printing path covered by the screen carriage during the printing process corresponds to a full rotation of the printing cylinder and is adapted to a maximum format size of the printed matter. Therefore, the printing medium is spread out over the entire screen area corresponding to the maximum printing format by the flood doctor blade. The one in the spread the evaporation of the printing medium on the screen surface of the solvents contained in the printing medium leads to environmental pollution.
- the printing squeegees and the flood squeegees are also controlled as a function of the moving position of the screening carriage. This enables a more precise and simple control of the doctoring point of application, regardless of the printing speed.
- the method according to the invention offers the greatest possible flexibility with regard to the printing process.
- a screen printing cylinder machine of the type mentioned at the outset it is provided according to the first solution that two mutually independent drive motors for driving the printing cylinder during the printing process and for driving the screening carriage during the return, a device with which the drive motor of the screening carriage during the printing process (advance of Screening carriage) can be decoupled from the movement of the screening carriage which is synchronized with the printing cylinder, and a device can be used with which the printing cylinder can be brought to a standstill before the return of the screening carriage has ended.
- the drive motor of the screen carriage is coupled to it via a freewheel which decouples the drive motor from the screen carriage in the direction of rotation of the motor shaft, which corresponds to the advance of the screen carriage during the printing process, and the drive motor of the printing cylinder to it coupled to a freewheel which decouples the drive motor from the pressure cylinder in the direction of rotation of the motor shaft, which corresponds to the return of the screening carriage.
- the first freewheel can e.g. located on the hub of the drive motor of the screening carriage and designed as an industrial freewheel. Particularly when, as a device for synchronizing the movement of the printing cylinder and the screening carriage, one on each end face of the printing cylinder
- a screen printing machine of the type mentioned at the outset that two mutually independent drive motors are provided for the printing cylinder and the screening carriage and an electronic control device which has an input unit for data for setting the printing path and the printing speed, an associated programmable computer unit for processing the data in control signals for the drive motors and two control units assigned to the drive motors, which are connected to position measuring systems for the pressure cylinder and the screening carriage.
- rotary pulse encoders are provided as position measuring systems, which are arranged on the pressure cylinder or a drive wheel for the screening carriage.
- glass measuring rods can also be used instead of the rotary pulse encoder.
- any other suitable position measuring system can be considered.
- Fig. 1 is a schematic representation of a screen printing machine
- FIG. 2 shows a schematic illustration of an electronic control device for the screen printing cylinder machine shown in FIG. 1.
- the screen printing cylinder machine shown schematically there essentially consists of a printing cylinder 1 receiving the material to be printed, a screen carriage 2 traveling over it, a squeegee 3 which can be lowered onto the screen stencil and which is raised in the return shown in FIG. 1 is, and a flood knife 4 lowered during the return.
- the pressure cylinder 1 is connected to a drive 7 via a coaxial belt pulley 5 connected to it and a toothed belt 6.
- the pulley 5 has a coaxial rotary pulse generator, which serves as a path measuring system 8 for the arc angle of the printing cylinder which has been traveled from the initial position.
- the sieve carriage 2 runs, reversibly moved by a toothed belt 9, over the pressure cylinder 1.
- the toothed belt 9 is driven in its reversing movement by a drive wheel 10 and runs via a pulley 11.
- the drive wheel 10 has a coaxial rotary pulse generator, which as Position measuring system 12 is used for the distance covered by the screening carriage 2 from the starting position.
- the electronic control device for the screen printing cylinder machine shown in FIG. 1 essentially consists of a memory-programmable computing unit 13 with an input unit 14 and in each case one control unit 15 and 16 for the drive motor 17 of the printing cylinder 1 or drive motor 18 of the screening carriage 2.
- the two drive motors 17 and 18 are controlled as follows:
- the data for the print path and the print speed are read into the computing unit 13 via a keyboard and stored therein.
- the computing unit 13 processes the data into control signals for the drive motors 17 and 18.
- the control signals are fed to the corresponding control units 15 and 16, where they are converted into the corresponding currents and voltages for the drive motors 17 and 18.
- the printing cylinder 1 and the screen carriage 2 are at rest.
- the squeegees 3 and 4 are raised.
- the printing material not shown in the drawing, is placed on the printing cylinder 1.
- the squeegee 3 is lowered onto the screen template of the screen carriage 2, not shown in the drawing.
- the two position measuring systems 8 and 12 transmit the respective movement positions of the printing cylinder 1 and the screening carriage
- control unit 15 and 16 The movement positions are compared in the control units 15 and 16 with the control signals defining the pressure path. If the movement positions correspond to the relevant control signals, a signal is sent from the respective control unit 15 or 16 to the Computing unit 13 transmits, which then outputs a control signal for stopping printing cylinder 1 or screen carriage 2 to control unit 15 or 16.
- the printing process is ended in that the screen carriage 2 stops after reaching the printing path programmed into the computing unit 13 and the printing squeegee 3 is moved upwards.
- the printing cylinder 1 runs in the same direction of rotation until it reaches the starting position.
- the flood doctor 4 is lowered onto the screen template of the screen carriage 2.
- the screen carriage 2 returns immediately after the printing process, it is moved back to the starting position and stopped by a corresponding control signal.
- the flood knife 4 is moved up after stopping.
- the printing process is completed and the next print item is placed on the printing cylinder 1. The printing process then starts again.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Screen Printers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94904948A EP0683729B1 (de) | 1993-02-13 | 1994-01-19 | Verfahren zur steuerung einer siebdruckzylindermaschine |
DE59400641T DE59400641D1 (de) | 1993-02-13 | 1994-01-19 | Verfahren zur steuerung einer siebdruckzylindermaschine |
US08/507,220 US5706722A (en) | 1993-02-13 | 1994-01-19 | Process for controlling a cylinder-type silk screen printing machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4304399.2 | 1993-02-13 | ||
DE4304399A DE4304399A1 (de) | 1993-02-13 | 1993-02-13 | Verfahren zur Steuerung einer Siebdruckzylindermaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994018008A1 true WO1994018008A1 (de) | 1994-08-18 |
Family
ID=6480410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1994/000043 WO1994018008A1 (de) | 1993-02-13 | 1994-01-19 | Verfahren zur steuerung einer siebdruckzylindermaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5706722A (de) |
EP (1) | EP0683729B1 (de) |
DE (2) | DE4304399A1 (de) |
ES (1) | ES2093518T3 (de) |
WO (1) | WO1994018008A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0775055B1 (de) * | 1994-08-12 | 1998-11-11 | F. XAVER LEIPOLD GMBH & CO. KG | Durch- oder siebdruckmaschine |
DE4444189C2 (de) * | 1994-08-12 | 1999-09-09 | Leipold Xaver F Gmbh & Co Kg | Durch- oder Siebdruckmaschine |
DE19703312A1 (de) * | 1997-01-30 | 1998-08-06 | Rk Siebdrucktechnik Gmbh | Verfahren zur Steuerung einer Siebdruckzylindermaschine |
US6397742B1 (en) * | 1999-09-30 | 2002-06-04 | Becmar Corporation | Single plane screen printer |
WO2009067779A1 (en) * | 2007-11-30 | 2009-06-04 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources Canada | Vapour phase esterification of free fatty acids |
US9352546B2 (en) * | 2014-08-21 | 2016-05-31 | Atma Champ Ent. Corp. | Servo-driven cylinder screen printing machine |
TWI556977B (zh) * | 2014-08-21 | 2016-11-11 | Atma Champ Entpr Corp | Servo Drive Roller Screen Printing Machine |
EP2990203B1 (de) * | 2014-08-25 | 2018-08-08 | ATMA Champ Ent. Corp. | Siebdruckmaschine mit Servoantrieb. |
CN105437738B (zh) * | 2014-08-26 | 2018-02-23 | 东远机械工业(昆山)有限公司 | 伺服驱动滚筒式网版印刷机 |
US10173413B2 (en) * | 2016-12-12 | 2019-01-08 | Atma Champ Enterprise Corporation | Rotary printing machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0463258A1 (de) * | 1990-06-26 | 1992-01-02 | Sakura Seiki Co., Ltd. | Siebdruckvorrichtung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT956921B (it) * | 1972-06-28 | 1973-10-10 | Brasa Umberto | Sistema per il registro automatico del nastro di carta su cilindro nella stampa serigrafica in parti colare a piu colori |
DE3730409A1 (de) * | 1987-09-10 | 1989-03-23 | Balsfulland Gmbh Maschf Geb | Siebdruckmaschine |
DE3915482C2 (de) * | 1989-05-11 | 1995-01-26 | Stork Mbk Gmbh | Vorrichtung zum winkelsynchronen Antreiben einzelner Druckzylinder einer Rotationsdruckmaschine |
DE4012573A1 (de) * | 1990-04-20 | 1991-10-24 | Gerd Quast | Siebdruckwerk |
NL9101176A (nl) * | 1991-07-05 | 1993-02-01 | Stork Brabant Bv | Zeefdrukinrichting met continue rapportering van roterende sjablonen. |
-
1993
- 1993-02-13 DE DE4304399A patent/DE4304399A1/de not_active Withdrawn
-
1994
- 1994-01-19 ES ES94904948T patent/ES2093518T3/es not_active Expired - Lifetime
- 1994-01-19 US US08/507,220 patent/US5706722A/en not_active Expired - Fee Related
- 1994-01-19 DE DE59400641T patent/DE59400641D1/de not_active Expired - Fee Related
- 1994-01-19 EP EP94904948A patent/EP0683729B1/de not_active Expired - Lifetime
- 1994-01-19 WO PCT/DE1994/000043 patent/WO1994018008A1/de active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0463258A1 (de) * | 1990-06-26 | 1992-01-02 | Sakura Seiki Co., Ltd. | Siebdruckvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE4304399A1 (de) | 1994-08-18 |
EP0683729A1 (de) | 1995-11-29 |
US5706722A (en) | 1998-01-13 |
EP0683729B1 (de) | 1996-09-11 |
DE59400641D1 (de) | 1996-10-17 |
ES2093518T3 (es) | 1996-12-16 |
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