EP2878382A1 - Method and apparatus for applying a flowable substance - Google Patents
Method and apparatus for applying a flowable substance Download PDFInfo
- Publication number
- EP2878382A1 EP2878382A1 EP14194849.7A EP14194849A EP2878382A1 EP 2878382 A1 EP2878382 A1 EP 2878382A1 EP 14194849 A EP14194849 A EP 14194849A EP 2878382 A1 EP2878382 A1 EP 2878382A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- outlet opening
- nozzle end
- air
- condensate
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000009969 flowable effect Effects 0.000 title claims abstract description 12
- 239000000126 substance Substances 0.000 title claims abstract description 10
- 239000003292 glue Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 2
- 238000009833 condensation Methods 0.000 abstract description 20
- 230000005494 condensation Effects 0.000 abstract description 20
- 238000001035 drying Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 56
- 239000000853 adhesive Substances 0.000 description 31
- 230000001070 adhesive effect Effects 0.000 description 31
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 238000011109 contamination Methods 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004839 Moisture curing adhesive Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42C—BOOKBINDING
- B42C9/00—Applying glue or adhesive peculiar to bookbinding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0208—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to separate articles
Definitions
- the digital printing technique has made it possible to print and collect the sheets and / or sheets in such a way that they each contain the contents of an entire book or printed product. These loose sheets or sheets are not very well suited to being dropped or slipped inside, transported or stacked.
- This Hilfsverleimung can be done in a variety of ways.
- a proven technique is that cold glue drops are applied to the outer surfaces of the sheets and / or sheets in the section area of the printed product. With these cold glue drops, the individual sheets and / or sheets, which lie on top of one another, are glued together and thus form a fairly stable book block, which is easy to handle for the further production processes of a bound book.
- a nozzle unit for processing flowable substances, in particular glue disclosed.
- a liquid in particular water
- glue is flushed out of an end portion facing a nozzle orifice.
- a water column remains in the nozzle channel and seals it to the outside.
- the closure is moved away and the water column is ejected by the promotion of glue.
- Adhesive residues accumulate at the outlet opening, harden and then deflect the emerging adhesive jet, which further fouling of the nozzle and thus leads to clogging of the nozzle after a short time.
- a safe glue outlet can only be guaranteed if the adhesive residues are removed periodically. The period between cleaning intervals may be very small, depending on the adhesive used and the prevailing environmental conditions.
- a device for applying fluent substances, in particular glue is published on a substrate which contains a fixed support arm and a metering valve connected thereto.
- the metering valve is arranged pivotably on an axis on the support arm. During the pivoting movement from the working position to the rest position The outlet opening of the nozzle of the metering valve sweeps over the cleaning section of a rubber element and is thereby freed of adhering glue residues. In the rest position, the outlet opening is closed by the smooth sealing portion of the rubber element.
- the rubber element is preferably arranged on a spring-elastic holder.
- a similar device is used in the EP 2 006 030 A2 described.
- the metering valve with the outlet opening for the adhesive, paints or varnishes fixed.
- a pivotable outer closure is movable between a rest position and a working position adjustable, wherein in the rest position of the outer closure closes the outlet opening of the metering valve.
- This device has the same disadvantages as the device according to DE 1 99 36 670 C1 ,
- an apparatus and method for dispensing a moisture-curing adhesive has become known.
- the device has a plurality of nozzle openings which are operable in two operating modes. In an operating mode, not all the nozzle openings are in operation, so that precautions must be taken so that the unused nozzle openings do not stick together.
- the residual adhesive at the exit opening of the nozzle comes into contact with the outside air, in which moisture is in contact, and thereby hardens.
- the curing of the adhesive is by a flow chamber in the region of the nozzle opening prevented by a gas is introduced into this flow chamber, which flows around the outlet opening of the nozzle with the adhesive residues and thus the moisture from the air can not come into contact with the adhesive.
- This device is designed and proven for moisture-curing adhesives such as PUR and the like.
- the device is not suitable for cold glue adhesives that cure by drying. It has been shown in experiments that the flushing of the outlet opening of a nozzle operable with cold glue with dry air or a gas that does not prevent fouling of the nozzle by adhesive residues, but rather promotes.
- the invention aims to remedy this situation.
- the task is based, with an order of a flowable material, in particular a glue, in particular a cold glue to prevent the contamination or clogging of nozzle valves, so that a high and guaranteed availability of the system Applying the glue can be ensured without having to resort to manual or mechanical cleaning operations of the nozzles during production or in the course of production interruptions.
- the proposal according to the invention is based on the findings that a nozzle clogging can be set up, in particular, but not only, easily during an operational downtime of the nozzle valve. If no adhesive is expelled over a longer period of time, the adhesive remaining in the nozzle outlet opening can dry out and form a plug, which then stubbornly closes the nozzle outlet opening. In order to keep the outlet opening of the nozzle better free, needle valves could be used per se, through which the nozzle outlet opening can be closed with a pen if necessary. However, it has been shown that even equipped with such an infrastructure nozzle outlet openings be easily closed by such lumpy adhesive residues and can lead to inoperability.
- the active cooling of the nozzle end is not absolutely understood, because if the temperature differences between the nozzle end and air for forming a condensed water, or the supplied air is adequately saturated with moisture, the cooling of at least one zone of the nozzle end can be dispensed with. This can be done, for example, when the air is treated by a mist generator or a water-fed ultrasonic atomizer.
- Condensation also known as condensation
- condensation is a wet, misty deposit on objects, with condensate always forming when moist, warm air hits a cold or colder surface.
- Warm air can bind much more water than cold air. When warm air cools down, the excess amount of water in the air settles in the form of condensation.
- At least one zone of the nozzle end is subjected to cooling and acted upon by a moist and / or temperature-moderated air, such that by the Impact between the supplied moist and / or moderately moderated air and the cooled zone of the nozzle end a condensation Formed amount, this condensation is responsible for the fact that it is continuously counteracts drying or sticking of the flowable material at the nozzle outlet opening of the nozzle end.
- the solution according to the invention makes it possible that manual or other cleaning of the nozzles during production or on the occasion of production interruptions activated for cleaning purposes is completely eliminated, as a result of which high productivity can be maintained.
- the nozzle valve is part of a comprehensive nozzle assembly, which includes other functional elements, such as Klebstoffzu réelle Gustav, moist air generator, dry air supply, water supply, drainage device, etc. (Reference is made to the description of the figures).
- the contamination is usually caused by adhesive residues, which accumulate in the area of the nozzle outlet opening and dry, and can also mix with dust particles from the ambient air.
- adhesive residues which accumulate in the area of the nozzle outlet opening and dry, and can also mix with dust particles from the ambient air.
- Such pasty mixture is predestined to dry out easily, so that over time, clumps may form, which hang on the opening of the nozzle outlet opening, and thus completely prevent the glue feed from the nozzle outlet opening or significantly distracting, which leads to erroneous operations in the specific application of the adhesive.
- the condensation water which originates in the region of the nozzle end and the nozzle outlet opening then flows off, thereby entraining dirt particles and possible glue residue particularly up to the nozzle outlet opening in such a way that continuous cleaning on the one hand of the nozzle end and on the other hand of the nozzle outlet opening takes place.
- the condensate is contaminated with a certain amount of dirt particles, a corresponding discharge of condensed water must be provided by acting continuously or intermittently with a lateral jet of air on the nozzle outlet opening, which blows away there accumulating condensation, which condensate then arranged in a laterally Collection collected and then derived.
- the air jet can intermittently and additionally be used with a higher pressure pulse, but in any case it should not adversely affect the consistency of the glue jet flowing out of the nozzle outlet opening.
- a protective effluent device is provided, which is oriented exclusively on the discharge of such a charged condensed water. This drain device must be able to shield the end nozzle outlet from the dripping or draining condensation, so that the glue to be applied does not come into contact with this condensation.
- a corresponding embodiment variant of this drainage device according to the invention consists in that it closes the immediate nozzle outlet opening in the shape of a contour, so that the condensation water can flow off integrally on the circumference of the nozzle end via the drainage device.
- a metered subset of the moist and / or temperature-moderated air is passed through preferably specially attached and designed flow openings in the interior of the drain device, said air flow is preferably directed directly to the nozzle outlet opening, which undergoes a continuous lubricating effect by the moist air.
- the flow openings within the drainage device may further be formed so that the air flow through these flow openings a undergoes certain acceleration, which in turn maximizes the lubricating effect in the region of the nozzle outlet opening, whereby then the risk of a closure of the nozzle outlet opening by glue lumps finally tends to zero.
- the supplied air has a high degree of purity, and this is achieved, for example, that this air is enriched with a corresponding amount of distilled water. In any case, this air should not come in contact with dirt contaminated condensate before acting on the nozzle outlet opening. It is also advantageous if the air / water mixture is designed so that the conditions for a high-fogging air flow are met, with which then an unimpeded flow of the glue stream is ensured.
- the discharge device with tangentially applied air holes through which the air flows into the interior of the discharge device, and there, preferably in the region of the nozzle outlet opening, forms a swirl flow, which together with the lubricating effect against the nozzle outlet opening also a consolidation of the flowing in the center of this swirl flow glue jet due to the forming there cyclone effect guaranteed.
- This air-swirling flow is then discharged either axially or tangentially with respect to the axis of the nozzle outlet opening, but without being detrimental to the compactness of the glue jet.
- this air swirling flow can also entrain and dissipate any condensate drops forming on the inner wall of the outflow device.
- Such a constellation occurs when the nozzle exit opening is not fully contoured completed by the drainage device, or can be completed, but when operated between the two parts with a contoured gap through which smallest condensed water drops can pass into the interior space of the drainage device.
- this gap should preferably be dimensioned such that any condensation water droplets forming on the inner wall of the drainage device and adhering there due to their surface tension can easily be entrained by the injected air swirling flow.
- the final purpose of the invention based on the one hand to cool the nozzle end with the nozzle exit opening for the glue supply according to need by a coolant or a cooling device.
- the cooled nozzle end is then blown or circulated through moist and / or temperature moderated air.
- this air flow has a higher temperature than the prevailing temperature at the nozzle end.
- the condensate forming by this impact fogs the outer surface of the nozzle end and thereby prevents the glue from drying out and also the formation of glue lumps in the area of the nozzle outlet opening.
- the provisions for the discharge of contaminated with dirt particles condensate in the context of a drain device must be designed and aligned so that said condensation is safely passed to a lower side collecting tray and collected there, and then from time to time to be sucked with a suction device, wherein the drip pan can also be covered with sponge-like mats, which can be replaced at full load with dirt particles or the dirt particles can be sucked through a drying process.
- FIG. 1 For the sake of general explanation, the application of a nozzle valve 1 for applying dots of glue to printed products is shown, which is then used for the formation of an auxiliary glued book block.
- the attachment of the glue takes place with each signature or sheet A, whereby multiple-acting glue dots B per sheet or sheet are provided.
- the auxiliary glued book block then forms an intended for further processing unit.
- FIG. 2 a nozzle unit according to the invention for the metered delivery of adhesive from a nozzle, in a perspective view from the front, is shown.
- FIG. 3 the same nozzle unit is shown in a perspective view from behind.
- a nozzle valve 1 belonging to the nozzle assembly is supplied with adhesive by an adhesive supply line 2, wherein the nozzle valve 1 is generally connected via a connecting element 6 to a moist air generator 3.
- a contact-acting Peltier element 10 is arranged between the nozzle valve 1 and the moist air generator 3, such that this Peltier element, on the one hand, conducts heat to the moist air generator 3 and, on the other hand, cold to the nozzle valve 1.
- the Peltier element 10 or other electrothermal transducers are supplied via a feed 9 with electrical energy.
- the humid air generator 3 is provided with a dry air supply 4 and a water supply 5.
- FIG. 4 shows a sectional view through said nozzle assembly, wherein the inner life of the nozzle valve 1 is not shown, since it is familiar to the expert.
- FIG. 5 shows a further sectional view of the nozzle assembly, at right angles to the representation in FIG. 4 in the area of the moist air generator.
- FIGS. 4 and 5 are the FIGS. 4 and 5 at the same time:
- the water supply is controlled by a water supply regulator 19, which preferably increases the supply of the amount of water at elevated temperature in the humid air generator 3 via a control.
- the dry air is heated by the heat generated from the Peltier element 10 and enriched in the humid air generator 3 with water.
- the warm, moist air then passes via a line 11 in a distribution plate 7, and from there the water enriched air is conveyed through arranged in the distribution plate channels 12 into a nozzle chamber 13.
- a nozzle end 1 belonging to the nozzle end 17, which end with a nozzle outlet opening 20th is provided, is in operative connection with the Peltier element 10, wherein the nozzle end 17 is cooled by this, and forms the application of moist air condensed water.
- a discharge device 14 here in the form of a protective tube, separates the opening 18 from the space needed to carry out the glue jet, thereby ensuring that no contaminated water falls on the products (paper) to be glued.
- the discharged condensed water is transported into a collecting trough 8 arranged laterally below the moist air generator 3.
- a bore 16 is integrated, with which dry air can be diverted from the dry air supply 4. This dry air blows on the sponge 15 in the drip pan 8 and thus dries the sponge in this area. Due to the capillary action of the sponge, the condensate is transported within the sponge and led from the area in which the condensation arises in the area where the drying takes place.
- the discharge device 14 can be provided with tangentially applied air holes through which the air flows into the interior of this drain device, and there, preferably in the region of the nozzle outlet opening 20, comes to a swirl flow, said swirl flow together with the generating lubricating effect against the nozzle outlet opening 20 also a consolidation of the operating in the center of the swirl flow glue jet due to the cyclone effect caused by the swirl flow leads. This air swirl flow is then removed as described above, without adversely affecting the glue jet influence.
- this air swirling flow can also entrain and dissipate any condensate drops forming on the inner wall of the outflow device.
- a constellation always occurs when the outer contour of the nozzle outlet opening is not completely closed by the inner contour of the discharge device in the circumferential direction, but when a gap-shaped opening is formed between the contours of the two parts through which condensate drops flow into the interior of the drainage device can.
- this gap can be dimensioned so that any condensation water drops adhere to the inner wall of the drain device due to their surface tension, and thus can easily be entrained by the air swirl flow.
- FIG. 6 shows an overall control of the nozzle assembly, with the various elements and their Interdependenz to each other. From this figure, the relationships respectively. Interdependencies of the individual elements to each other quite clear why it can be dispensed with a repetitive description.
Abstract
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Auftragen eines fliessfähigen Stoffes, insbesondere eines Leims, auf flächige oder gewölbte Produkte, mit einem Düsenaggregat, welches im Wesentlichen aus einem zu einem Düsenventil gehörenden Düsenende (17) und aus weiteren Mitteln zur Sicherung einer fortlaufenden ungehemmten Ausströmung des fliessfähigen Stoffes aus einer zum Düsenende (17) gehörenden Düsenaustrittsöffnung (20) besteht. Die Mittel bestehen darin, dass mindestens eine Zone des Düsenendes durch eine feuchte und/oder temperaturmoderierte Luft beaufschlagt wird. Durch das Treffen der zugeführten feuchten und/oder temperaturmoderierten Luft auf die Zone des Düsenendes entsteht ein Kondenswasser, dessen Ableitung ein Eintrocknen oder Verkleben des fliessfähigen Stoffes an der Düsenaustrittsöffnung (20) des Düsenendes (17) verhindert.The invention relates to a method and a device for applying a flowable substance, in particular a glue, to flat or curved products, comprising a nozzle unit which essentially comprises a nozzle end (17) belonging to a nozzle valve and further means for securing a continuous, uninhibited one Outflow of the flowable material from a nozzle end (17) belonging to the nozzle outlet opening (20). The means consist in that at least one zone of the nozzle end is acted upon by a moist and / or temperature moderated air. By meeting the supplied moist and / or moderately moderated air to the zone of the nozzle end creates a condensation, the derivative prevents drying or sticking of the flowable substance at the nozzle outlet opening (20) of the nozzle end (17).
Description
Für die Herstellung eines Buches oder Druckproduktes werden einzelne Blätter und/oder Bogen bedruckt und zu einem losen Block zusammen getragen. In einem Klebebinder werden die losen Blätter und/oder Bogen innerhalb des so ausgebildeten Stapels zueinander ausgerichtet. Nachfolgend werden sie dann in einer Klammer gehalten und über Bearbeitungsstationen geführt, auf welchen der Rücken des Druckproduktes bearbeitet und mit Klebstoff versehen wird.For the production of a book or printed product, individual sheets and / or sheets are printed and worn together to form a loose block. In an adhesive binder, the loose sheets and / or sheets within the stack thus formed are aligned. Subsequently, they are then held in a clamp and guided over processing stations on which the back of the printed product is processed and provided with adhesive.
Die Digitaldrucktechnik hat es möglich gemacht, die Blätter und/oder Bogen so in der Folge zu bedrucken und zu sammeln, dass sie jeweils den Inhalt eines ganzen Buches oder Druckproduktes beinhalten. Diese losen Blätter- oder Bogenstapel sind nicht sehr gut geeignet um, ohne auseinander zu fallen oder inwendig zu verrutschen, transportiert oder gestapelt zu werden.The digital printing technique has made it possible to print and collect the sheets and / or sheets in such a way that they each contain the contents of an entire book or printed product. These loose sheets or sheets are not very well suited to being dropped or slipped inside, transported or stacked.
Es hat sich deshalb das Hilfsverleimen der einzelnen Blätter und/oder Bogen zueinander als geeignetes Mittel erwiesen, um die einzelnen Teile des Buchblocks zu einem einzigen Buchblock zusammenzubringen resp. zu integrieren.It has therefore proved the auxiliary gluing the individual sheets and / or sheets to each other as a suitable means to bring together the individual parts of the book block to a single book block resp. to integrate.
Diese Hilfsverleimung kann auf verschiedenste Art und Weise erfolgen. Eine bewährte Technik besteht darin, dass an den Aussenflächen der Bogen und/oder Blätter im Abschnittsbereich des Druckproduktes, Kaltleimtropfen aufgebracht werden. Mit diesen Kaltleimtropfen werden die einzelnen Blätter und/oder Bogen, die aufeinander liegen, verklebt und bilden so einen recht stabilen Buchblock, der für die weiteren Herstellungsprozesse eines gebundenen Buches einfach zu handhaben ist.This Hilfsverleimung can be done in a variety of ways. A proven technique is that cold glue drops are applied to the outer surfaces of the sheets and / or sheets in the section area of the printed product. With these cold glue drops, the individual sheets and / or sheets, which lie on top of one another, are glued together and thus form a fairly stable book block, which is easy to handle for the further production processes of a bound book.
Für das Auftragen der Kaltleimtropfen auf das Papier werden Düsenventile eingesetzt, die aber notorisch leicht verschmutzen und dadurch häufig ihren finalen Zweck versagen.For the application of the cold glue drops on the paper nozzle valves are used, but notoriously easily pollute and thus often fail their final purpose.
In der
In
Eine ähnliche Vorrichtung wird in der
Aus
Hier will die Erfindung Abhilfe schaffen. Der Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, liegt die Aufgabe zugrunde, bei einem Auftrag eines fliessfähigen Stoffes, insbesondere eines Leims, insbesondere eines Kaltleims, die Verschmutzung oder Verstopfung von Düsenventilen zu verhindern, so dass eine hohe und garantierte Verfügbarkeit des Systems zum Auftragen des Leims gewährleistet werden kann, ohne auf manuelle oder mechanisch angewandte Reinigungsvorgänge der Düsen während der Produktion oder im Verlaufe von Produktionsunterbrüchen zurückgreifen zu müssen.The invention aims to remedy this situation. The invention, as characterized in the claims, the task is based, with an order of a flowable material, in particular a glue, in particular a cold glue to prevent the contamination or clogging of nozzle valves, so that a high and guaranteed availability of the system Applying the glue can be ensured without having to resort to manual or mechanical cleaning operations of the nozzles during production or in the course of production interruptions.
Der erfindungsgemässe Vorschlag geht von den Erkenntnissen aus, dass sich eine Düsenverstopfung insbesondere, aber nicht nur, leicht während einer betrieblichen Stillstandzeit des Düsenventils einstellen kann. Wird über eine längere Zeitperiode kein Klebstoff ausgestossen, so kann der in der Düsenaustrittsöffnung verbleibende Klebstoff austrocknen und einen Pfropfen bilden, der die Düsenaustrittsöffnung dann hartnäckig verschliesst. Um die Austrittsöffnung der Düse besser frei zu halten, könnten an sich Nadelventile eingesetzt werden, durch welche die Düsenaustrittsöffnung bei Bedarf mit einem Stift geschlossen werden kann. Allerdings hat es sich gezeigt, dass auch die mit einer solchen Infrastruktur ausgestatteten Düsenaustrittsöffnungen durch solche klumpenartige Klebstoffreste nach wie vor leicht verschlossen werden und zu einer Betriebsuntauglichkeit führen können.The proposal according to the invention is based on the findings that a nozzle clogging can be set up, in particular, but not only, easily during an operational downtime of the nozzle valve. If no adhesive is expelled over a longer period of time, the adhesive remaining in the nozzle outlet opening can dry out and form a plug, which then stubbornly closes the nozzle outlet opening. In order to keep the outlet opening of the nozzle better free, needle valves could be used per se, through which the nozzle outlet opening can be closed with a pen if necessary. However, it has been shown that even equipped with such an infrastructure nozzle outlet openings be easily closed by such lumpy adhesive residues and can lead to inoperability.
Zu diesem Zweck wird nun erfindungsgemäss ein Verfahren und eine Vorrichtung vorgeschlagen, mit denen die Verschmutzung und Verstopfung von Düsenaustrittsöffnungen bei Düsenventilen ausgeschlossen wird, indem fortlaufend oder mindestens intermittierend betriebsspezifische Vorkehrungen und Hilfsmittel gegenüber Düsenende und Düsenaustrittsöffnung getroffen werden resp. zum Einsatz gelangen, dergestalt, dass das Düsenende intermittierend oder fortlaufend gekühlt wird, und gleichzeitig wird dieses Düsenende auch intermittierend oder fortlaufend mit einer feuchten und/oder temperaturmoderierten Luft beaufschlagt.For this purpose, a method and apparatus according to the invention is now proposed, with which the contamination and clogging of nozzle outlet openings is excluded in nozzle valves by continuously or at least intermittently plant-specific precautions and tools are taken towards the nozzle end and nozzle outlet opening resp. be used, such that the nozzle end is cooled intermittently or continuously, and at the same time this nozzle end is also applied intermittently or continuously with a moist and / or moderately moderated air.
Indessen, die aktive Kühlung des Düsenendes ist nicht absolut zu verstehen, denn wenn die Temperaturunterschiede zwischen Düsenende und Luft zur Bildung eines Kondenswassers gegeben sind, oder die zugeführte Luft angemessen mit Feuchtigkeit gesättigt ist, kann auf die Kühlung mindestens einer Zone des Düsenendes verzichtet werden. Dies lässt sich beispielsweise bewerkstelligen, wenn die Luft anhand eines Nebelerzeugers oder eines wassergespeisten Ultraschallzerstäubers behandelt wird.However, the active cooling of the nozzle end is not absolutely understood, because if the temperature differences between the nozzle end and air for forming a condensed water, or the supplied air is adequately saturated with moisture, the cooling of at least one zone of the nozzle end can be dispensed with. This can be done, for example, when the air is treated by a mist generator or a water-fed ultrasonic atomizer.
Wenn also nachfolgend von einer Kühlung der Zone des Düsenendes die Rede ist, so wird damit lediglich eine Vorzugsausführung der Erfindung in den Vordergrund gerückt.Thus, if below is a cooling of the zone of the nozzle end, so that only a preferred embodiment of the invention is brought into the foreground.
Beim Kondenswasser, auch Schwitzwasser genannt, handelt es sich um einen feuchten nebeligen Niederschlag auf Gegenständen, wobei sich Kondenswasser immer dann bildet, wenn feuchte, warme Luft auf eine kalte oder kältere Oberfläche trifft. Warme Luft kann erheblich mehr Wasser binden als kalte Luft. Kühlt sich warme Luft ab, schlägt sich der überflüssige Wasseranteil der Luft in Form von Kondenswasser nieder.Condensation, also known as condensation, is a wet, misty deposit on objects, with condensate always forming when moist, warm air hits a cold or colder surface. Warm air can bind much more water than cold air. When warm air cools down, the excess amount of water in the air settles in the form of condensation.
Demnach wird bei einer Vorzugsausführung der Erfindung mindestens eine Zone des Düsenendes einer Kühlung unterzogen und durch eine feuchte und/oder temperaturmoderierte Luft beaufschlagt, dergestalt, dass sich durch den Impact zwischen der zugeführten feuchten und/oder temperaturmoderierten Luft und der gekühlten Zone des Düsenendes eine Kondenswasser-Menge bildet, wobei dieses Kondenswasser ursächlich dafür steht, dass es fortlaufend einem Eintrocknen oder Verkleben des fliessfähigen Stoffes an der Düsenaustrittsöffnung des Düsenendes entgegen gewirkt wird.Accordingly, in a preferred embodiment of the invention, at least one zone of the nozzle end is subjected to cooling and acted upon by a moist and / or temperature-moderated air, such that by the Impact between the supplied moist and / or moderately moderated air and the cooled zone of the nozzle end a condensation Formed amount, this condensation is responsible for the fact that it is continuously counteracts drying or sticking of the flowable material at the nozzle outlet opening of the nozzle end.
Sonach wird erfindungsgemäss Remedur gegen die offenkundigen Unzulänglichkeiten aus dem Stand der Technik geschaffen, nach welchem das Düsenventil, d.h. insbesondere dessen Düsenaustrittsöffnung, insbesondere beim Aufbringen von Kaltleim auf Papier leicht verschmutzen oder verstopfen kann.Thus, according to the invention, remedy is provided against the obvious shortcomings of the prior art, according to which the nozzle valve, i. in particular its nozzle outlet opening, especially when applying cold glue on paper can easily become dirty or clogged.
Die erfindungsgemässe Lösung macht es möglich, dass eine manuelle oder sonstige Reinigung der Düsen während der Produktion oder anlässlich von zu Reinigungszwecken eingeschalteten Produktionsunterbrüchen vollumfänglich wegfallen, wodurch eine hohe Produktivität aufrecht erhalten werden kann.The solution according to the invention makes it possible that manual or other cleaning of the nozzles during production or on the occasion of production interruptions activated for cleaning purposes is completely eliminated, as a result of which high productivity can be maintained.
Vorliegend ist das Düsenventil Bestandteil eines umfassenden Düsenaggregates, welches weitere funktionsbedingte Elemente beinhaltet, wie beispielsweise Klebstoffzuführleitung, Feuchtlufterzeuger, Trockenluftzufuhr, Wasserzufuhr, Ablaufvorrichtung, etc. (Hierzu wird auf die Beschreibung der Figuren verwiesen).In the present case, the nozzle valve is part of a comprehensive nozzle assembly, which includes other functional elements, such as Klebstoffzuführleitung, moist air generator, dry air supply, water supply, drainage device, etc. (Reference is made to the description of the figures).
Die Verschmutzung wird in der Regel durch Klebstoffreste hervorgerufen, welche sich im Bereich der Düsenaustrittöffnung ansammeln und antrocknen, und sich darüber hinaus mit Staubpartikeln aus der Umgebungsluft vermischen können. Eine solche pastöse Mischung ist dazu prädestiniert, leicht auszutrocknen, so dass mit der Zeit Klumpen entstehen können, die an der Öffnung der Düsenaustrittsöffnung hängen, und so die Leimzuführung aus der Düsenaustrittsöffnung ganz unterbinden oder wesentlich ablenken können, was bei der spezifischen Auftragung des Klebestoffes zu Fehloperationen führt.The contamination is usually caused by adhesive residues, which accumulate in the area of the nozzle outlet opening and dry, and can also mix with dust particles from the ambient air. Such pasty mixture is predestined to dry out easily, so that over time, clumps may form, which hang on the opening of the nozzle outlet opening, and thus completely prevent the glue feed from the nozzle outlet opening or significantly distracting, which leads to erroneous operations in the specific application of the adhesive.
In diesem Zusammenhang ist auch beobachtet worden, dass Klebstoffreste auch als Tropfen oder Pfropfen im Bereich der Düsenaustrittsöffnung labil hängen bleiben, und von Zeit zu Zeit während der Produktion abfallen können, was zu einer unkontrollierten Verklebung der Produkte oder zu deren Verschmutzung führt.In this connection, it has also been observed that adhesive residues, even as drops or gobs, remain labile in the region of the nozzle outlet opening and can drop off during production from time to time, which leads to uncontrolled adhesion of the products or to their contamination.
Erfindungsgemäss fliesst das im Bereich des Düsenendes und der Düsenaustrittsöffnung entstehende Kondenswasser dann ab, und reisst dabei insbesondere bis zu der Düsenaustrittsöffnung Schmutzpartikeln und allfällige Leimreste mit, dergestalt, dass dadurch eine fortlaufende Reinigung einerseits des Düsenendes und andererseits der Düsenaustrittsöffnung erfolgt.According to the invention, the condensation water which originates in the region of the nozzle end and the nozzle outlet opening then flows off, thereby entraining dirt particles and possible glue residue particularly up to the nozzle outlet opening in such a way that continuous cleaning on the one hand of the nozzle end and on the other hand of the nozzle outlet opening takes place.
Fällt der Verschmutzungsgrad im Bereich der Düsenaustrittsöffnung gering oder unbedeutend aus, so sind keine besonderen Massnahmen vorzusehen, welche auf das Auffangen des Kondenswassers ausgelegt sind. Menge und Schmutzbelastung dieses Kondenswassers führen in einem solchen Fall zu keinen Nachteilen hinsichtlich der Leimoperation, so dass es ohne Weiteres operationell zu vertreten ist, wenn dieses Kondenswasser mit dem Leimstrahl abgeführt wird.If the degree of contamination in the region of the nozzle outlet opening is small or insignificant, no special measures are to be provided which are designed for collecting the condensed water. In such a case, the amount and dirt load of this condensed water does not lead to any disadvantages with regard to the glue operation, so that it is readily responsible for operational reasons when this condensate water is removed with the glue jet.
Ist das Kondenswasser mit einem gewissen Anteil Schmutzpartikeln belastet, so muss eine entsprechende Ableitung des Kondenswassers vorgesehen werden, indem durchgehend oder intermittierend mit einem seitlichen Luftstrahl auf die Düsenaustrittsöffnung eingewirkt wird, der das sich dort ansammelnde Kondenswasser wegbläst, wobei dieses Kondenswasser dann in einem seitlich angeordneten Sammelrohr aufgefangen und anschliessend abgeleitet wird. Der Luftstrahl kann demnach intermittierend und zusätzlich mit einem höheren Druckimpuls zum Einsatz kommen, aber er soll auf alle Fälle die aus der Düsenaustrittsöffnung ausströmende Konsistenz des Leimstrahls nicht nachteilig beeinflussen.If the condensate is contaminated with a certain amount of dirt particles, a corresponding discharge of condensed water must be provided by acting continuously or intermittently with a lateral jet of air on the nozzle outlet opening, which blows away there accumulating condensation, which condensate then arranged in a laterally Collection collected and then derived. Accordingly, the air jet can intermittently and additionally be used with a higher pressure pulse, but in any case it should not adversely affect the consistency of the glue jet flowing out of the nozzle outlet opening.
Gilt aber die Vorgabe, dass wegen eines bestimmten Verschmutzungsgrades des Kondenswassers die Leimzuführung auf alle Fälle von einem solchen belasteten Kondenswasser nicht tangiert werden darf, so wird in solchen Fällen eine schutzwirkende Ablaufvorrichtung vorgesehen, welche ausschliesslich auf die Ableitung eines solcherart belasteten Kondenswassers ausgerichtet ist. Diese Ablaufvorrichtung muss in der Lage sein, die endseitige Düsenaustrittsöffnung von dem abtropfenden oder abfliessenden Kondenswasser abzuschirmen, damit der aufzutragende Leim nicht mit diesem Kondenswasser in Berührung kommt.However, if the requirement that due to a certain degree of contamination of the condensate, the glue supply in all cases must not be affected by such a contaminated condensation, so in such cases, a protective effluent device is provided, which is oriented exclusively on the discharge of such a charged condensed water. This drain device must be able to shield the end nozzle outlet from the dripping or draining condensation, so that the glue to be applied does not come into contact with this condensation.
Eine entsprechende erfindungsgemässe Ausführungsvariante dieser Ablaufvorrichtung besteht darin, dass sie die unmittelbare Düsenaustrittsöffnung konturförmig abschliesst, so dass das Kondenswasser am Umfang des Düsenendes integral über die Ablaufvorrichtung abfliessen kann.A corresponding embodiment variant of this drainage device according to the invention consists in that it closes the immediate nozzle outlet opening in the shape of a contour, so that the condensation water can flow off integrally on the circumference of the nozzle end via the drainage device.
Dabei ist es bei einer solchen Konfiguration erfindungsgemäss vorteilhaft, wenn zusätzliche Vorkehrungen getroffen werden, damit die Düsenaustrittsöffnung selbst fortlaufend mit einem dosierten feuchten Luftstrom angeströmt wird, um dort eine feuchtebedingte Schmierwirkung zu entfalten, welche eine maximierte Fliessfähigkeit des ausströmenden Leims aus der Düsenaustrittsöffnung sicherstellt, womit auch gewährleistet wird, dass sich im Bereich der Düsenaustrittsöffnung keine noch so kleinen Verschmutzungen mehr bilden können, welche leicht zu Kristallisationspunkten bei der Bildung von Klumpen oder Verstopfungen mutieren können.It is advantageous in such a configuration according to the invention, if additional precautions are taken so that the nozzle outlet itself is continuously flowed with a metered moist air flow to unfold there a moisture-induced lubricating effect, which ensures a maximized flowability of the outflowing glue from the nozzle outlet opening, thus It is also ensured that in the region of the nozzle outlet opening no amount of dirt can form, which can easily mutate to crystallization points in the formation of lumps or blockages.
Zu diesem Zweck wird eine dosierte Teilmenge der feuchten und/oder temperaturmoderierten Luft über vorzugsweise speziell angebrachte und gestaltete Durchflussöffnungen in den Innenraum der Ablaufvorrichtung geleitet, wobei diese Luftströmung vorzugsweise direkt auf die Düsenaustrittsöffnung gerichtet ist, welche durch die feuchtehaltige Luft einer fortlaufenden Schmierwirkung erfährt.For this purpose, a metered subset of the moist and / or temperature-moderated air is passed through preferably specially attached and designed flow openings in the interior of the drain device, said air flow is preferably directed directly to the nozzle outlet opening, which undergoes a continuous lubricating effect by the moist air.
Die Durchflussöffnungen innerhalb der Abflussvorrichtung können des Weiteren so ausgebildet werden, dass die Luftströmung über diese Durchflussöffnungen eine gewisse Beschleunigung erfährt, welche wiederum die Schmierwirkung im Bereich der Düsenaustrittsöffnung maximiert, womit dann die Gefahr eines Verschlusses der Düsenaustrittsöffnung durch Leimklumpen endgültig gegen Null strebt.The flow openings within the drainage device may further be formed so that the air flow through these flow openings a undergoes certain acceleration, which in turn maximizes the lubricating effect in the region of the nozzle outlet opening, whereby then the risk of a closure of the nozzle outlet opening by glue lumps finally tends to zero.
Bei einer solchen Operation, wo es darum geht, die Düsenaustrittsöffnung gezielt zu beaufschlagen, muss sichergestellt werden, dass die zugeführte Luft einen hohen Reinheitsgrad aufweist, und dies beispielsweise dadurch erreicht wird, dass diese Luft mit einer entsprechenden Menge destillierten Wassers angereichert wird. Auf alle Fälle soll diese Luft vor Beaufschlagung der Düsenaustrittsöffnung nicht mit Schmutz belastetem Kondenswasser in Kontakt kommen. Von Vorteil ist es auch, wenn die Luft/Wasser-Mischung so gestaltet wird, dass die Voraussetzungen für eine High-Fogging-Luftströmung erfüllt werden, mit welcher dann eine ungehinderte Durchflussströmung des Leimstrahls gewährleistet wird.In such an operation, where it comes to selectively apply the nozzle orifice, it must be ensured that the supplied air has a high degree of purity, and this is achieved, for example, that this air is enriched with a corresponding amount of distilled water. In any case, this air should not come in contact with dirt contaminated condensate before acting on the nozzle outlet opening. It is also advantageous if the air / water mixture is designed so that the conditions for a high-fogging air flow are met, with which then an unimpeded flow of the glue stream is ensured.
In diesem Zusammenhang ist es erfindungsgemäss auch möglich, die Ablaufvorrichtung mit tangential angelegten Luftbohrungen zu versehen, durch welche die Luft in den Innenraum der Ablaufvorrichtung einströmt, und dort, vorzugsweise im Bereich der Düsenaustrittsöffnung, eine Drallströmung bildet, welche nebst der Schmierwirkung gegenüber der Düsenaustrittsöffnung auch eine Konsolidierung des im Zentrum dieser Drallströmung fliessenden Leimstrahls auf Grund der sich dort bildenden Zyklon-Wirkung gewährleistet. Diese Luft-Drallströmung wird dann entweder axial oder tangential gegenüber der Achse der Düsenaustrittsöffnung abgeführt, ohne aber auf die Kompaktheit des Leimstrahls nachteilig zu wirken.In this context, it is also possible according to the invention to provide the discharge device with tangentially applied air holes through which the air flows into the interior of the discharge device, and there, preferably in the region of the nozzle outlet opening, forms a swirl flow, which together with the lubricating effect against the nozzle outlet opening also a consolidation of the flowing in the center of this swirl flow glue jet due to the forming there cyclone effect guaranteed. This air-swirling flow is then discharged either axially or tangentially with respect to the axis of the nozzle outlet opening, but without being detrimental to the compactness of the glue jet.
Darüber hinaus kann diese Luft-Drallströmung auch etwaige an der Innenwand der Ablaufvorrichtung sich bildende Kondenswasser-Tropfen mitreissen und abführen.In addition, this air swirling flow can also entrain and dissipate any condensate drops forming on the inner wall of the outflow device.
Eine solche Konstellation tritt dann in Erscheinung, wenn die Düsenaustrittsöffnung nicht vollumfänglich durch die Ablaufvorrichtung konturförmig abgeschlossen ist, oder abgeschlossen werden kann, sondern wenn zwischen den beiden Teilen mit einem konturgemässen Spalt operiert wird, durch welchen kleinste Kondenswasser-Tropfen in den Innerraum der Ablaufvorrichtung hindurch treten können. Dieser Spalt soll aber vorzugsweise so dimensioniert werden, dass sich allfällige an der Innenwand der Ablaufvorrichtung bildende und dort auf Grund ihrer Oberflächenspannung haftende Kondenswasser-Tropfen durch die injizierte Luft-Drallströmung leicht mitgerissen werden können.Such a constellation occurs when the nozzle exit opening is not fully contoured completed by the drainage device, or can be completed, but when operated between the two parts with a contoured gap through which smallest condensed water drops can pass into the interior space of the drainage device. However, this gap should preferably be dimensioned such that any condensation water droplets forming on the inner wall of the drainage device and adhering there due to their surface tension can easily be entrained by the injected air swirling flow.
Erfindungsgemäss wird aber, entsprechend dem finalen Zweck der Erfindung, zugrunde gelegt, einerseits das Düsenende mit der Düsenaustrittsöffnung für die Leimzuführung bedarfsmässig durch ein Kühlmittel oder eine Kühlvorrichtung zu kühlen. Andererseits wird das gekühlte Düsenende dann durch feuchte und/oder temperaturmoderierten Luft angeblasen oder umströmt. Auf alle Fälle wird zugrunde gelegt, dass diese Luftströmung eine höhere Temperatur als die vorherrschende Temperatur am Düsenende aufweist. Das sich durch diesen Impact bildende Kondenswasser beschlägt die Aussenoberfläche des Düsenendes und verhindert dadurch ein Austrocknen des Leims und auch die Bildung von Leimklumpen im Bereich der Düsenaustrittsöffnung.According to the invention, however, according to the final purpose of the invention, based on the one hand to cool the nozzle end with the nozzle exit opening for the glue supply according to need by a coolant or a cooling device. On the other hand, the cooled nozzle end is then blown or circulated through moist and / or temperature moderated air. In any case, it is assumed that this air flow has a higher temperature than the prevailing temperature at the nozzle end. The condensate forming by this impact fogs the outer surface of the nozzle end and thereby prevents the glue from drying out and also the formation of glue lumps in the area of the nozzle outlet opening.
Setzt man dann erfindungsgemäss auf eine gezielte Ableitung des Kondenswassers, so werden Vorkehrungen getroffen, dass sich dieses Kondenswasser mit allfälligen Klebstoffresten und sonstigen Staubpartikeln vermischen kann, damit diese dann vom Fluss des Kondenswassers in Abströmungsrichtung sicher mitgerissen werden können.If one then sets according to the invention to a targeted discharge of condensed water, so provision is made that this condensation can mix with any adhesive residues and other dust particles, so that they can then be entrained safely by the flow of condensate in the outflow direction.
Indem je nach Verschmutzungsgrad auf eine gezielte Ableitung des belasteten Kondenswassers gesetzt wird, kann auf die Sauberhaltung der Düsenaustrittsöffnung gezielt eingewirkt werden. Dadurch wird eine hohe Verfügbarkeit des Düsenventils allgemein erreicht. Dieser Effekt lässt sich auch innerhalb der betrieblichen Produktionsunterbrüche aufrechterhalten. Wird kein Klebstoff aus dem Düsenventil gefördert, verhindert das sich fortlaufend bildende Kondenswasser, in Wirkverbindung mit anderen komplementären Lufteindüsungen in den Innenraum der Ablaufvorrichtung, das Eintrocknen von allfälligen Klebstoffresten, womit ein Verkleben der Düsenaustrittsöffnungen ausgeschlossen bleibt.By depending on the degree of contamination is set to a targeted discharge of the contaminated condensate, can be acted on the cleanliness of the nozzle outlet opening targeted. As a result, a high availability of the nozzle valve is generally achieved. This effect can also be maintained within the company's production stoppages. If no adhesive is conveyed from the nozzle valve, the continuously forming condensation water, in conjunction with other complementary Lufteindüsungen prevented in the interior of the drainage device, the drying of any adhesive residues, whereby a sticking of the nozzle outlet openings is excluded.
Die Vorkehrungen zur Ableitung des mit Schmutzpartikeln belasteten Kondenswassers im Rahmen einer Ablaufvorrichtung müssen so beschaffen und ausgerichtet sein, dass das genannte Kondenswasser sicher zu einer unterseitig angeordneten Auffangwanne geleitet und dort aufgefangen wird, um dann von Zeit zu Zeit mit einer Saugeinrichtung abgesaugt werden zu können, wobei die Auffangwanne auch mit schwammartigen Matten belegt sein kann, welche bei Vollbelastungen mit Schmutzpartikeln ausgewechselt oder die Schmutzpartikeln durch einen Trocknungsprozess abgesaugt werden können.The provisions for the discharge of contaminated with dirt particles condensate in the context of a drain device must be designed and aligned so that said condensation is safely passed to a lower side collecting tray and collected there, and then from time to time to be sucked with a suction device, wherein the drip pan can also be covered with sponge-like mats, which can be replaced at full load with dirt particles or the dirt particles can be sucked through a drying process.
Es ist auch möglich das mit Schmutzpartikeln belastete Kondenswasser wieder zu verdampfen und danach abzuführen oder in einem geschlossenen Verflüssigungskreislauf wieder zu verwenden. Die Schmutzpartikeln und Klebstoffreste werden dabei in einem Auffangbehälter zurück gehalten. Der Auffangbehälter wird von Zeit zu Zeit entleert und gereinigt.It is also possible to evaporate the contaminated with dirt particles condensation again and then dissipate or reuse in a closed liquefaction cycle. The dirt particles and adhesive residues are held back in a collecting container. The collection container is emptied and cleaned from time to time.
Nachstehend wird die Erfindung unter Bezugnahme auf die Zeichnung, auf die hinsichtlich aller erfindungswesentlichen und in der Beschreibung nicht näher herausgestellten Einzelheiten ausdrücklich Bezug genommen wird, erläutert. Alle für das unmittelbare Verständnis der Erfindung nicht wesentlichen Elemente sind weggelassen worden, Gleiche Elemente sind in den verschiedenen Figuren mit den gleichen Bezugszeichen versehen. In der Zeichnung zeigt:
- Fig. 1
- eine allgemeine Anwendung eines Düsenventils zum Anbringen von Klebstoffpunkte auf Druckprodukte;
- Fig. 2
- eine erste perspektivische Darstellung des gesamtem Düsenaggregats, bestehend aus einem Düsenventil in Kombination mit verschiedenen funktionsbedingten Elementen;
- Fig. 3
- eine weitere perspektivische Darstellung des gesamtem Düsenaggregats, bestehend aus einem Düsenventil in Kombination mit verschiedenen funktionsbedingten Elementen;
- Fig. 4
- einen Schnittdarstellung durch das gesamte Düsenaggregat;
- Fig. 5
- eine weitere Schnittdarstellung durch das gesamte Düsenaggregat, rechtwinklig zur Darstellung gemäss
Figur 4 ; - Fig. 6
- ein System zur Steuerung des Düsenaggregates.
- Fig. 1
- a general application of a nozzle valve for applying dots of glue to printed products;
- Fig. 2
- a first perspective view of the entire nozzle assembly, consisting of a nozzle valve in combination with various function-related elements;
- Fig. 3
- a further perspective view of the entire nozzle assembly, consisting of a nozzle valve in combination with various functionally related elements;
- Fig. 4
- a sectional view through the entire nozzle unit;
- Fig. 5
- a further sectional view through the entire nozzle unit, perpendicular to the representation according to
FIG. 4 ; - Fig. 6
- a system for controlling the nozzle assembly.
In
In der
In der
Für die nachfolgende Beschreibung des Düsenaggregats werden die
Ein zum Düsenaggregat gehörendes Düsenventil 1 wird durch eine Klebstoffzuführleitung 2 mit Klebstoff versorgt, wobei das Düsenventil 1 allgemein über ein Verbindungselement 6 mit einem Feuchtlufterzeuger 3 verbunden ist. Ein kontaktwirkendes Peltierelement 10 ist zwischen dem Düsenventil 1 und dem Feuchtlufterzeuger 3 angeordnet, dergestalt, dass dieses Peltierelement einerseits Wärme zum Feuchtlufterzeuger 3 und andererseits Kälte zum Düsenventil 1 führt. Das Peltierelement 10 oder andere elektrothermische Wandler werden über eine Speisung 9 mit elektrischer Energie versorgt. Der Feuchtlufterzeuger 3 ist mit einer Trockenluftzufuhr 4 und einer Wasserzufuhr 5 versehen.A
Die
Die
Auch für die nachfolgende Beschreibung des Düsenaggregats werden die
Die Wasserzufuhr wird durch einen Wasserzufuhrregler 19 gesteuert, der vorzugsweise bei erhöhter Temperatur im Feuchtlufterzeuger 3 über eine Regelung die Zuführung der Wassermenge erhöht. Die trockene Luft wird durch die erzeugte Wärme aus dem Peltierelement 10 erwärmt und im Feuchtlufterzeuger 3 mit Wasser angereichert. Die warme, feuchte Luft gelangt dann über eine Leitung 11 in eine Verteilplatte 7, und von da wird die mit Wasser angereicherte Luft über in der Verteilplatte angeordnete Kanäle 12 in einen Düsenraum 13 gefördert. Ein zum Düsenventil 1 gehörendes Düsenende 17, welches endseitig mit einer Düsenaustrittsöffnung 20 versehen ist, steht mit dem Peltierelement 10 in Wirkverbindung, wobei das Düsenende 17 von diesem gekühlt wird, und dessen Beaufschlagung mit feuchter Luft ein Kondenswasser bildet.The water supply is controlled by a
Das Kondenswasser, mit allenfalls gelösten Klebstoffresten, wird über eine Öffnung 18 in eine Auffangwanne 8 geleitet. In der Auffangwanne 8 ist ein Schwamm 15 angebracht, welcher das Kondenswasser auffängt. Eine Ableitungsvorrichtung 14, hier von der Form eines Schutzrohres, trennt die Öffnung 18 vom Raum der benötigt wird, um den Klebstoffstrahl durchzuführen, und stellt dadurch sicher, dass kein verschmutztes Wasser auf die zu beleimenden Produkte (Papier) fällt.The condensate, with any dissolved adhesive residues, is passed through an
In Wirkverbindung mit einem Schwamm 15 wird das abgeleitete Kondenswasser in eine unter dem Feuchtlufterzeuger 3 seitlich angeordneten Auffangwanne 8 transportiert. Im Feuchtlufterzeuger 3 ist eine Bohrung 16 integriert, mit welcher trockene Luft aus der Trockenluftzufuhr 4 abgezweigt werden kann. Diese trockene Luft bläst auf den Schwamm 15 in der Auffangwanne 8 und trocknet damit den Schwamm in diesem Bereich. Durch die Kapillarwirkung des Schwammes wird das Kondenswasser innerhalb des Schwammes transportiert und von dem Bereich in dem das Kondenswasser anfällt in den Bereich geführt, wo die Trocknung stattfindet.In operative connection with a
Die Ablaufvorrichtung 14 lässt sich mit tangential angelegten Luftbohrungen versehen, durch welche die Luft in den Innenraum dieser Ablaufvorrichtung strömt, und dort, vorzugsweise im Bereich der Düsenaustrittsöffnung 20, zu einer Drallströmung kommt, wobei diese Drallströmung nebst der erzeugenden Schmierwirkung gegenüber der Düsenaustrittsöffnung 20 auch zu einer Konsolidierung des im Zentrum der Drallströmung operierenden Leimstrahls auf Grund der von der Drallströmung hervorgerufenen Zyklon-Wirkung führt. Diese Luft-Drallströmung wird dann wie oben beschrieben abgeführt, ohne nachteilig auf den Leimstrahl Einfluss zu wirken.The
Darüber hinaus kann diese Luft-Drallströmung auch etwaige an der Innenwand der Ablaufvorrichtung sich bildende Kondenswasser-Tropfen mitreissen und abführen. Eine solche Konstellation tritt dann immer auf, wenn die äussere Kontur der Düsenaustrittsöffnung nicht vollumfänglich durch die innere Kontur der Ablaufvorrichtung in Umfangsrichtung abgeschlossen ist, sondern wenn zwischen den Konturen der beiden Teile eine spaltmässige Öffnung entsteht, durch welche Kondenswasser-Tropfen ins Innere der Ablaufvorrichtung fliessen können. Dieser Spalt kann aber so dimensioniert werden, dass allfällige Kondenswasser-Tropfen durch ihre Oberflächenspannung an der Innenwand der Ablaufvorrichtung haften, und so von der Luft-Drallströmung leicht mitgerissen werden können.In addition, this air swirling flow can also entrain and dissipate any condensate drops forming on the inner wall of the outflow device. Such a constellation always occurs when the outer contour of the nozzle outlet opening is not completely closed by the inner contour of the discharge device in the circumferential direction, but when a gap-shaped opening is formed between the contours of the two parts through which condensate drops flow into the interior of the drainage device can. However, this gap can be dimensioned so that any condensation water drops adhere to the inner wall of the drain device due to their surface tension, and thus can easily be entrained by the air swirl flow.
Die
Claims (18)
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US (2) | US10183307B2 (en) |
EP (1) | EP2878382B1 (en) |
JP (1) | JP6525561B2 (en) |
CN (1) | CN104668134A (en) |
BR (1) | BR102014029196A2 (en) |
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DE102020117624A1 (en) | 2020-07-03 | 2022-01-05 | 4BoxProducer.com Ltd. | Device and method for applying cold glue |
DE102020008094A1 (en) | 2020-07-03 | 2022-01-05 | 4BoxProducer.com Ltd. | Device and method for applying cold glue |
WO2023170000A1 (en) | 2022-03-08 | 2023-09-14 | 4BoxProducer.com Ltd. | Method for operating a cold glue application device, and device for applying cold glue |
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WO2018066660A1 (en) * | 2016-10-07 | 2018-04-12 | 武蔵エンジニアリング株式会社 | Liquid material discharge device with temperature control device, application device for same, and application method |
CN110712446B (en) * | 2019-10-08 | 2021-01-08 | 烟台职业学院 | Financial invoice posting auxiliary device and using method |
IT201900022872A1 (en) * | 2019-12-03 | 2021-06-03 | Dromont S P A | AUTOMATIC HUMIDIFICATION SYSTEM OF A DISPENSING HEAD OF A FLUID PRODUCT DOSING MACHINE |
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Also Published As
Publication number | Publication date |
---|---|
EP2878382B1 (en) | 2019-06-12 |
US10183307B2 (en) | 2019-01-22 |
US20190105666A1 (en) | 2019-04-11 |
MX2014012688A (en) | 2015-05-28 |
BR102014029196A2 (en) | 2015-09-15 |
JP2015104728A (en) | 2015-06-08 |
US20150151320A1 (en) | 2015-06-04 |
CN104668134A (en) | 2015-06-03 |
JP6525561B2 (en) | 2019-06-05 |
ZA201408809B (en) | 2016-08-31 |
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