WO2002057079A1 - Scraping device for cleaning a rotating cylinder - Google Patents
Scraping device for cleaning a rotating cylinder Download PDFInfo
- Publication number
- WO2002057079A1 WO2002057079A1 PCT/CH2001/000743 CH0100743W WO02057079A1 WO 2002057079 A1 WO2002057079 A1 WO 2002057079A1 CH 0100743 W CH0100743 W CH 0100743W WO 02057079 A1 WO02057079 A1 WO 02057079A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- scraper
- strain gauge
- roller
- sensors
- scraping device
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F9/00—Rotary intaglio printing presses
Definitions
- the present invention relates to a scraping device for cleaning a rotating roller, as defined in the preamble of independent claim 1.
- scrapers made of various materials are placed on the rollers at an angle of usually between 15 ° and 40 °.
- the scrapers are made of metal, plastic or composites, for example, depending on the surface of the rollers and their speed of rotation.
- Their contact pressure as the contact pressure per unit length of the scraper is called in this context, is normally between 80 and 400 N / m and is generated by the weight of the scraper and scraper holder, etc. and / or hydraulic devices.
- the invention is based on the following would perish.
- a scraper device for cleaning a rotating roller of the type mentioned at the outset is to be created, in which the contact pressure of the scraper can be measured with less space requirement and also during cleaning.
- the essence of the invention is that in a scraper device for cleaning a rotating roller, which comprises a scraper intended to be placed on the roller and a scraper holder for pressing the scraper with a contact pressure on the roller, at least one strain gauge on the scraper. Sensor is arranged, with which the contact pressure can be measured when the scraper lies against the roller.
- At least one strain gauge sensor is arranged on the scraper for measuring the contact pressure, there is no need for a spring balance to be attached to a fixed point.
- the contact pressure can also be checked in a simple manner if there is very little or no space available for attaching a spring balance.
- the means required for evaluating the measured values of the at least one strain gauge sensor can be arranged without problems at a location where there is sufficient space.
- strain gauge sensor it is also possible to measure the contact pressure using a strain gauge sensor during normal cleaning operations, since the scraper does not need to be lifted off the roller.
- the measurement of the contact pressure using a strain gauge sensor is based on the principle that the scraper is bent to different degrees depending on the contact pressure.
- the strain gauge sensor is stretched or compressed as the scraper bends, thereby changing its ohmic resistance. This ohmic resistance is measured and converted into the corresponding contact pressure.
- Suitable strain gauge sensors are known to the person skilled in the art and are commercially available.
- a large number of strain gauge sensors are preferably distributed regularly over the length of the scraper.
- the contact pressure can thus be determined by means of a large number of individual measurements, which are then, for example, averaged or evaluated in sections.
- the scraper advantageously has a plurality of scraper parts which are separated from one another by slots, a strain gauge sensor preferably being arranged on each scraper part.
- the or at least one of the strain gauge sensors is attached to the top of the scraper, i.e. on the side that faces away from the roller when the scraper is attached to the roller.
- the or at least one of the strain gauge sensors is attached to the underside of the scraper, ie on the side that faces the roller when the scraper is applied to the roller is.
- the strain gauge sensor is therefore better protected from the substance scraped off the roller.
- the strain gauge sensors are glued to the scraper.
- Commercially available strain gauge sensors can be easily glued to the scraper for manufacture.
- the strain gauge sensors are deposited on the scraper in a high vacuum. The connection between the strain gauge sensor and the scraper thus remains secure even at high temperatures.
- the strain gauge sensors are preferably provided with a protective cover. This prevents contamination or damage to the strain gauge sensor or sensors which influences the ohmic resistance.
- a signal line advantageously leads from each strain gauge sensor to a measuring amplifier, which is connected to an evaluation device, preferably a laptop computer.
- a multiplexer is advantageously assigned to the measuring amplifier and is connected to the evaluation device via a single line.
- the at least one strain gauge sensor is preferably designed such that the scraper experiences a change in its ohmic resistance of between 0.1 ⁇ and 2 ⁇ when it is placed on the roller.
- Fig. 1 - a part of a scraping device according to the invention according to a first embodiment on a roller in a side view;
- Fig. 3 - a scraper with strain gauge sensors according to a second embodiment
- Fig. 4 - a scraper with bevel and strain gauge sensor on the top in a side view
- Fig. 5 - a scraper with bevel and strain gauge sensor on the underside in a side view
- Fig. 6 - a scraper without bevel in a side view.
- a scraper 2 with bevel 21 bears against a roller 1 rotating in the direction of the arrow.
- the angle ⁇ between roller 1 and scraper 2 is approximately 40 °.
- the scraper 2 consists for example of metal, plastic or composites and is inserted into a scraper holder 3.
- the scraper 2 is pressed against the roller 1 via the scraper holder 3 with a certain contact pressure.
- This contact pressure can be measured with the aid of thin-film strain gauge sensors 4 which act on the in a high vacuum
- the top and bottom of the scraper 2 have been evaporated and are covered with a protective cover, for example made of plastic.
- the strain gauge sensors 4 consist, for example, of a wire in a plastic film.
- a signal line 5 leads from each strain gauge sensor 4 to a measuring amplifier and multiplexer 6, in which the measurement signals are amplified and then fed into a line 7 via an RS232 interface.
- the line 7 leads to an evaluation device in the form of a laptop computer 8, which converts the measured values into corresponding contact pressures and displays them on its screen. Both the contact pressures measured by the individual strain gauge sensors 4 and a contact pressure averaged over the entire scraper 2 can be determined.
- the scraper 102 is divided into a plurality of scraper parts 122 by slots 121, in particular milled sections.
- a strain gauge sensor 4 is arranged on each scraper part 122. Signal lines 5 in turn lead from the strain gauge sensors 4 to a measuring amplifier and multiplexer, not shown.
- the strain gauge sensors 4 are only arranged on the upper side of the scraper 2 provided with the bevel 21.
- the strain gauge sensors 4 are arranged only on the underside of the scraper 2 provided with the bevel 21.
- FIG. 6 In this fifth exemplary embodiment, in contrast to the scrapers 2 and 102 of the other exemplary embodiments, a scraper 202 has no flute.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01273289A EP1259377B1 (en) | 2001-01-18 | 2001-12-31 | Scraping device for cleaning a rotating cylinder |
DE50101707T DE50101707D1 (en) | 2001-01-18 | 2001-12-31 | SCRAPER FOR CLEANING A ROTATING ROLLER |
AT01273289T ATE261818T1 (en) | 2001-01-18 | 2001-12-31 | SCRAPING DEVICE FOR CLEANING A ROTATING ROLLER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH72/01 | 2001-01-18 | ||
CH722001 | 2001-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002057079A1 true WO2002057079A1 (en) | 2002-07-25 |
Family
ID=4321735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2001/000743 WO2002057079A1 (en) | 2001-01-18 | 2001-12-31 | Scraping device for cleaning a rotating cylinder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1259377B1 (en) |
DE (1) | DE50101707D1 (en) |
WO (1) | WO2002057079A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH700101A1 (en) * | 2008-12-12 | 2010-06-15 | Alfred Simonetti | Measuring scraper for measuring scraper-contact pressure in rotating or idle roller of paper machine, has blade segments arranged side-by-side, where end region of each blade segment is connected with extension guide rails |
WO2012130910A1 (en) * | 2011-03-29 | 2012-10-04 | Pacon Ltd. & Co. Kg | Pressure-zone regulation for a scraper |
CN105564010A (en) * | 2015-12-31 | 2016-05-11 | 苏州恩欧西精密机械制造有限公司 | Scratch-resistant scraper |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008001265A1 (en) | 2008-04-18 | 2009-10-22 | Voith Patent Gmbh | Scraper device and squeegee device |
DE102019117901A1 (en) * | 2019-07-03 | 2021-01-07 | Voith Patent Gmbh | Scraper device and method for determining the contact pressure of a scraper |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3368399A (en) * | 1964-07-15 | 1968-02-13 | Roland Offsetmaschf | Arrangement for measuring the ink pulling power on lithographic printing machines |
EP0549085A1 (en) * | 1991-11-22 | 1993-06-30 | Komori Corporation | Apparatus for controlling contact pressure between rotating members |
DE19953320A1 (en) * | 1999-11-05 | 2001-05-23 | Sprimag Spritzmaschb Gmbh & Co | Method for measurement of the pressure exerted by screen printer wiper uses one or more strain gauges attached to wiper to ensure repeatability of printing pressure and therefore print images |
-
2001
- 2001-12-31 EP EP01273289A patent/EP1259377B1/en not_active Expired - Lifetime
- 2001-12-31 DE DE50101707T patent/DE50101707D1/en not_active Expired - Lifetime
- 2001-12-31 WO PCT/CH2001/000743 patent/WO2002057079A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3368399A (en) * | 1964-07-15 | 1968-02-13 | Roland Offsetmaschf | Arrangement for measuring the ink pulling power on lithographic printing machines |
EP0549085A1 (en) * | 1991-11-22 | 1993-06-30 | Komori Corporation | Apparatus for controlling contact pressure between rotating members |
DE19953320A1 (en) * | 1999-11-05 | 2001-05-23 | Sprimag Spritzmaschb Gmbh & Co | Method for measurement of the pressure exerted by screen printer wiper uses one or more strain gauges attached to wiper to ensure repeatability of printing pressure and therefore print images |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH700101A1 (en) * | 2008-12-12 | 2010-06-15 | Alfred Simonetti | Measuring scraper for measuring scraper-contact pressure in rotating or idle roller of paper machine, has blade segments arranged side-by-side, where end region of each blade segment is connected with extension guide rails |
WO2012130910A1 (en) * | 2011-03-29 | 2012-10-04 | Pacon Ltd. & Co. Kg | Pressure-zone regulation for a scraper |
CN105564010A (en) * | 2015-12-31 | 2016-05-11 | 苏州恩欧西精密机械制造有限公司 | Scratch-resistant scraper |
CN105564010B (en) * | 2015-12-31 | 2018-05-04 | 苏州恩欧西智能科技有限公司 | A kind of anti-scratch scraper |
Also Published As
Publication number | Publication date |
---|---|
DE50101707D1 (en) | 2004-04-22 |
EP1259377B1 (en) | 2004-03-17 |
EP1259377A1 (en) | 2002-11-27 |
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