EP2031330A2 - Dispositif de rayonnement d'un substrat avec un rayonnement UV - Google Patents

Dispositif de rayonnement d'un substrat avec un rayonnement UV Download PDF

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Publication number
EP2031330A2
EP2031330A2 EP08162491A EP08162491A EP2031330A2 EP 2031330 A2 EP2031330 A2 EP 2031330A2 EP 08162491 A EP08162491 A EP 08162491A EP 08162491 A EP08162491 A EP 08162491A EP 2031330 A2 EP2031330 A2 EP 2031330A2
Authority
EP
European Patent Office
Prior art keywords
lamp
closure
housing
cooling
cooling gas
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.)
Withdrawn
Application number
EP08162491A
Other languages
German (de)
English (en)
Other versions
EP2031330A3 (fr
Inventor
Jerry Auerswald
Asmir Semanic
Stefan Richartz
Reto Huber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uviterno AG
Original Assignee
Uviterno AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uviterno AG filed Critical Uviterno AG
Publication of EP2031330A2 publication Critical patent/EP2031330A2/fr
Publication of EP2031330A3 publication Critical patent/EP2031330A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/65—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air the gas flowing in a closed circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Such a device is made of numerous documents, such as EP-0985 121 , known. This device has proven relatively good in many applications. However, on several occasions you want a safer irradiation result, but also more intensive cooling and - last but not least - a more compact design.
  • the present invention has the object of providing a device of the type mentioned in such a way that, if possible, safer or more efficient irradiation result, but above all a more intense cooling and - not least - also allows a more compact design. This is achieved according to the invention by the characterizing features of claim 1.
  • a particularly effective cooling is achieved when it is ensured that cooling air is formed in the region of the heat source to a cooling air flow, but there is often a movable shutter for controlling the irradiation time is used, but in turn prevented by its space requirement, there also accommodate conveyors for the cooling air.
  • a second step to provide the shutter with a drive and with the aid of which to rotate about the longitudinal axis of the UV lamp, for example a so-called medium-high-pressure mercury radiator along a rotational path, succeeds in any case very compact design.
  • this idea led to the idea of this rotatable one Part could itself be used as a kind of centrifugal pump for the cooling air.
  • at least a part of the closure is provided with conveying wings for the cooling gas, he also fulfills the function of a fan for air distribution, which is very effective because of its structurally tight arrangement and therefore optimizes the cooling.
  • the closure has two closure wings rotating in opposite directions of rotation so that the opening of the closure results in the course of the rotation of the two closure wings.
  • This opposite movement leads to an advantageous opening of the shutter in the manner of a diaphragm, namely with a symmetrical movement of an optical, extending through the outlet side of the housing axis.
  • cooling gas it will generally be air, although the use of other gases, such as an inert gas, e.g. Nitrogen, should not be excluded in the invention.
  • a flow divider arrangement which subdivides the cooling gas flow generated by the rotating shutter into at least two flow sections, one of which can be supplied by this arrangement of the UV lamp, whereas a further section can preferably be supplied to a wall cooled by a cooling fluid ,
  • This latter, preferred feature may additionally or alternatively be replaced by another feature, namely that of the other Section of the cooling gas flow in a cycle back or discharged to the outside.
  • there is a mixing of the cold and the heated air which avoids overheating of the same as well as the parts coming into contact with it or allows cooling of exhaust air or circulating air.
  • the invention also relates to a lamp according to claims 11 and 12, which is of particular importance for the device according to the invention, although it can also be used for other purposes. It has been found that the measurement of the temperature in other places is subject to great fluctuations, whereby any control or regulation is inefficient. This disadvantage is eliminated in the inventive lamp.
  • the invention relates to a control method according to claim 13, which takes into account that changed surface properties of a system to be cooled changes the absorption or reflection behavior of the components.
  • This is one of these, in itself of the above device also independent but there above all applicable with good success, invention underlying insight. It has been shown that in a merely predetermined (instead of in each case predetermined) temperature by IR absorption (which is the integrative effect of temperature-dependent systems and regulations) on the relevant components, the amount of air in an undesirable manner and thus increases the UV lamp is massively supercooled. This can reduce the efficiency and lifetime of the system.
  • the predetermined temperature value is adapted according to a predetermined curve, which results in an increased efficiency and a longer service life.
  • Fig. 1 runs, essentially endless, conveyor belt 1 below a lamp housing 2 over and driven by a merely schematically indicated drive roller 3, which in the illustration of Fig. 1
  • a pressure device 4 against the conveyor belt 1 pressed against a stationary roller 5 and driven by a drive motor 6.
  • the drive of the conveyor belt can be modified in any known manner.
  • intermittent drive such as a drive with Maltese Cross or with stepper motor could be used.
  • Other known possibilities of linear or round promotion are possible within the scope of the invention.
  • the conveyor belt 1 transports articles to be treated by means of UV radiation.
  • a sheet-like sheet 11 printed or provided with an adhesive to be cured by UV ray is shown, but it may also include corresponding articles, blister packs, plastic articles, painted articles or the like. be.
  • the housing 2 is advantageously made up of at least two housing parts 2a, 2b which are connected to one another via flanges 8 or in some other way, so that they can surround a UV tube 9 located as far as possible in the interior.
  • a UV-transparent plate 10 is used, which prevents the entry of dust into the housing 2 from the outside as possible, while also preventing cooling air losses to the outside.
  • This plate 10 can have an optical coating, such as an IR-absorbing coating and / or an anti-reflection coating at least for the wavelength of the lamp.
  • a cooling gas flow is mentioned here, then the cooling gas will generally be air, but for some applications, another gas may also be expedient, for example an inert gas, such as nitrogen (N 2 ).
  • the UV lamp 9 is preferably inserted in the direction of the longitudinal axis in the housing 2, so that it occupies a central position therein.
  • Fig. 2 For example, an approximately hexagonal support T is provided, which the lamp 9 and the - according to the following description - so functionally connected parts 12, 13, 17, 19, 24 receives and stores, and the schematically illustrated dovetail guides S in the housing 2 can be inserted is.
  • any other guide S can be used, which extends in each case in the direction of the longitudinal axis of the UV lamp 9 and parallel thereto.
  • the reflector 24 may be water-cooled, it may be advantageous if the carrier T is made so small that with him only the lamp 9 is inserted, whereas the reflector 24 is fixedly mounted in the housing 2.
  • the lamp 9 produces not only UV rays but also heat, which must be kept within limits, otherwise the danger of early destruction of the tube 9 is given.
  • a closure so called in the industry as a “shutter” means is provided which covers the light of the lamp 9 in its closed position after the window 10 toward, in the open position, however, releases. This closure is in the execution after Fig. 1 of two wings 12, 13 are formed, which rotate in the preferred embodiment in the opposite direction of rotation around the longitudinal axis of the housing 2.
  • the nature of the drive is not critical, because it may be a single motor 14, which drives the two shafts 15, 16 via a gear in opposite directions, but it can also each of the shafts 15, 16 has its own , suitably with the other synchronized, own engine.
  • At least a portion of the closure is provided with conveying wings 17 for the cooling gas, advantageously carries at least the closure member 12 over its entire circumference such wings.
  • These wings 17 can between each other baggy closed and only against the UV lamp 9 to open (also an opening radially outward would be possible) have intermediate spaces, but it is preferred if the closure between at least a portion of the conveying wings 17 each one of radially inward radially outwardly leading opening 17 '(FIG. Fig. 2 ), because so does the centrifugal force similar to a fan blade in a more favorable manner in the sense of generating an air flow.
  • This air flow is indicated by the arrow [1].
  • the air flow [1] passes in an annular space 2c past the cooled ribs 7 of the outer housing shells 2a, 2b, so that an even more intensive cooling results.
  • the air diverter 18 has cooling channels 23 through which a liquid cooling medium flows in its interior, although it would also be conceivable to use an evaporable cooling medium for the purpose of cooling, as used for example in refrigerators. In any case, it is ensured that even the gas flowing in via a supply pipe 22 is effectively cooled. And also from the switch 18 to the air flow [1] Anlagengelenkte section of the flow.
  • a pressure fan may be connected to a supply port 22 at the supply side, although this will not be generally preferred because of the danger of the supply of dust particles. It is also understood that, if appropriate, only the first or only the second air switch 18 or 19 can be provided or that the flow division can be designed in a different manner. It would also be conceivable to feed the cooling gas flow tangentially (as shown), but to discharge it in the axial direction of the lamp 9 and vice versa.
  • the second air switch 19 divides the air flow again and generates an inner, secondary air flow [2], which passes directly to the UV lamp 9 and flows around it. It is advantageous if this further, radially inwardly guided or secondary section [2] of the air flow to a cooled by a cooling liquid 23 wall 24 can be fed, which - as can be seen - divided into two parts in this embodiment. This ensures that, on the one hand, the air (or the gas) efficiently dissipates the heat produced by the UV lamp 9, without the need for a complex construction, while this air flow itself transfers the heat to the cooling liquid 23.
  • This wall 24 is expediently designed as a reflector at the same time, which directs the UV light emitted by the lamp 9 upwards against the window 10.
  • This opening of the two closure parts 12, 13 should of course - to ensure uninterrupted transport of the parts 11 to be irradiated and they do not have to promote intermittently - done so that the open position of the shutter wings 12, 13 is synchronized with the position of the substrate 11 to be irradiated below the window 10.
  • a sensor arrangement 25 (only schematically indicated) is advantageously provided, which detects the presence of a part 11, such as a sheet or film to be dried, below the window 10 and then regulates the motors 6 and 14 via a synchronization circuit 26 synchronized.
  • the sensor assembly 25 may be of a type known per se, so that it need not be shown and described in detail.
  • a temperature sensor is arranged on a lamp reflector or in the exhaust air flow, but for various reasons, such as air turbulence, etc., the temperature detected only with rough approximation. If, how Fig. 3 illustrated, a thermal sensor 27 in the lamp housing 9 '(ie directly in the glass of the lamp 9) housed, in particular melted, then it is ensured that its measurement regardless of is random environmental temperature changes.
  • a thus formed lamp is here, and especially for the careful adjustment of the temperature of the UV lamp 9, particularly favorable, but can also regardless of the formation of the shutter 12, 13 with fan blades 17 apply wherever an accurate lamp temperature measurement is desired or necessary.
  • the control unit 29, a power curve 31 with juxtaposition of flow of the cooling fluid (see. Fig. 4 ) is assigned to a temperature-dependent value, in particular the power supplied to the UV lamp P, and that according to this power curve 31, the volume flow of the cooling fluid and / or its temperature is regulated. If the signal of the sensor 27 is supplied to the control circuit 29 via the line 28 in this embodiment, this is advantageous for the control, but not absolutely necessary, because the power curve 31 itself already includes the assignment of a temperature-dependent Value (namely, the power P), so that a control by means of this power curve 31 would be possible without the zoomed over the cable 28 signal.
  • a temperature-dependent Value namely, the power P
  • a signal corresponding to the power supplied to the lamp 9 (which in turn determines the temperature of the lamp).
  • This power signal can either be dependent on the position of an adjusting device for the power (ie a pure control in the open circuit), or it is a power meter or a current sensor (the voltage is indeed substantially constant) provided, the output signal to a control can be used in a closed loop.
  • the volume flow of the blower 21 driven by a motor 32 is regulated, which is also preferable because it allows a faster response control.
  • such temperature changes have a relatively long control time constant, which is why this type of control is less preferred.
  • the assignment of the power curve 31 can be solved constructively in various ways, for example by the control unit 29 has a program memory with this curve 31 or by training a software for the control unit (eg an electronic processor) with a corresponding algorithm.
  • the power curve 31 is shown substantially as rising at a predetermined angle straight line, because in general the relationship between power and cooling demand will be linear.
  • other forms of the curve are also conceivable, in particular if additional influencing variables are to be taken into account, or if the relationship to components to be controlled would be approximately logarithmic or exponential.
  • a predetermined dependence of the volume flow of the supplied power will result, regardless of other factors, such as the change of surfaces or the absorption change to components of the housing or the like. is.
  • control unit 29 it is within the scope of the invention quite possible to separate the two functions of the control unit 29 from each other and make the control in two stages, one of which regulates the power of the lamp and the second - based on the lamp power - the cooling, was it by changing the volume flow, be it (alternatively or additionally) by changing the cooling temperature.
  • Another possibility for the regulation would be that although the motor 32 with relatively constant, high power is operated, but instead of the motor 32, a recirculation bypassing the fan 21 return valve for returning the cooling gas flow from the outlet of the blower is opened more or less at its entrance, although such a solution will generally be less preferred.
  • control unit 29 may also have the same drive for the motor 32, which includes, for example, a frequency converter or a drive for a DC motor 32. Also, additionally or alternatively, the flow rate of the cooling water flow 23 could be regulated, in particular for keeping the temperature constant.
  • All motors 6, 14, possibly also 32 may preferably be synchronous motors or also stepper motors. Furthermore, it was mentioned above that a temperature control has a relatively large control time constant; this can be counteracted by placing in the measuring line, e.g. in the measuring cable 28, a differentiating stage, if necessary with a subsequent, a threshold determining stage installed so that deviations can be detected faster.
  • closure 12 may have a peripheral wall without openings between the conveying wings 17.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Coating Apparatus (AREA)
EP08162491.8A 2007-08-27 2008-08-18 Dispositif de rayonnement d'un substrat avec un rayonnement UV Withdrawn EP2031330A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007040209A DE102007040209A1 (de) 2007-08-27 2007-08-27 Vorrichtung zum Bestrahlen eines Substrats

Publications (2)

Publication Number Publication Date
EP2031330A2 true EP2031330A2 (fr) 2009-03-04
EP2031330A3 EP2031330A3 (fr) 2014-03-05

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ID=40091434

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EP08162491.8A Withdrawn EP2031330A3 (fr) 2007-08-27 2008-08-18 Dispositif de rayonnement d'un substrat avec un rayonnement UV

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EP (1) EP2031330A3 (fr)
DE (1) DE102007040209A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008058056A1 (de) * 2008-11-18 2010-07-08 Deutsche Mechatronics Gmbh UV-Bestrahlungsvorrichtung
CN107825841A (zh) * 2017-11-17 2018-03-23 海盐创美印业有限公司 一种光照合理的uv印刷机用固化装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930318A (en) 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine
DE2623020A1 (de) 1975-05-27 1977-03-31 Ppg Industries Inc Uv-strahler mit schwenkbaren verschluessen
US5094010A (en) 1990-07-05 1992-03-10 Amjo Infra-Red And Ultra-Violet Drying Systems, Inc. Vented ultraviolet drying system for drying fiberglass resins in boat hulls and decks
EP0830217B1 (fr) 1995-05-04 1999-11-24 NÖLLE GmbH Procede et dispositif permettant de durcir une couche sur un substrat
EP0985121A1 (fr) 1997-05-26 2000-03-15 Bernhard Max Glaus Dispositif pour l'exposition d'un substrat a des rayons uv et procede pour l'exploitation de ce dispositif
GB2388652A (en) 2002-02-25 2003-11-19 Marc Boden Light shuttering apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902643A1 (de) * 1989-01-30 1990-12-13 Metz Luft Und Trocknungsanlage Uv-strahler
JP3425627B2 (ja) * 1992-08-18 2003-07-14 株式会社シンクロン 標準光源およびその制御方法
US5595118A (en) * 1995-10-16 1997-01-21 F & L Machinery Design, Inc. Drying apparatus for a dry off-set printing press having an ultra-violet lamp assembly
GB9607129D0 (en) * 1996-04-04 1996-06-12 Gew Ec Ltd Uv dryer with improved reflector
US5861633A (en) * 1997-08-04 1999-01-19 Con-Trol-Cure, Inc. Irradiator apparatus
CA2316333A1 (fr) * 1997-12-29 1999-07-22 Povl Kass Lampe, tube de lampe et procede de reglage de la lampe
US7077547B2 (en) * 2004-07-29 2006-07-18 Nordson Corporation Shuttered lamp assembly and method of cooling the lamp assembly
DE102004060592A1 (de) * 2004-12-16 2006-07-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren und Vorrichtung zur Bestimmung der Kolbentemperatur von Hochdruck-Entladungslampen
JP2009037736A (ja) * 2005-11-22 2009-02-19 Sharp Corp 放電管、表示装置用照明装置、液晶表示装置、及び液晶テレビジョン

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930318A (en) 1973-04-23 1976-01-06 Continental Can Company, Inc. Ultraviolet curing machine
DE2623020A1 (de) 1975-05-27 1977-03-31 Ppg Industries Inc Uv-strahler mit schwenkbaren verschluessen
US5094010A (en) 1990-07-05 1992-03-10 Amjo Infra-Red And Ultra-Violet Drying Systems, Inc. Vented ultraviolet drying system for drying fiberglass resins in boat hulls and decks
EP0830217B1 (fr) 1995-05-04 1999-11-24 NÖLLE GmbH Procede et dispositif permettant de durcir une couche sur un substrat
EP0985121A1 (fr) 1997-05-26 2000-03-15 Bernhard Max Glaus Dispositif pour l'exposition d'un substrat a des rayons uv et procede pour l'exploitation de ce dispositif
GB2388652A (en) 2002-02-25 2003-11-19 Marc Boden Light shuttering apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008058056A1 (de) * 2008-11-18 2010-07-08 Deutsche Mechatronics Gmbh UV-Bestrahlungsvorrichtung
CN107825841A (zh) * 2017-11-17 2018-03-23 海盐创美印业有限公司 一种光照合理的uv印刷机用固化装置

Also Published As

Publication number Publication date
EP2031330A3 (fr) 2014-03-05
DE102007040209A1 (de) 2009-03-12

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