EP2128060B1 - Machine d'estampage de feuilles - Google Patents

Machine d'estampage de feuilles Download PDF

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Publication number
EP2128060B1
EP2128060B1 EP09005195.4A EP09005195A EP2128060B1 EP 2128060 B1 EP2128060 B1 EP 2128060B1 EP 09005195 A EP09005195 A EP 09005195A EP 2128060 B1 EP2128060 B1 EP 2128060B1
Authority
EP
European Patent Office
Prior art keywords
film
embossing
foundation
web
machine according
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.)
Active
Application number
EP09005195.4A
Other languages
German (de)
English (en)
Other versions
EP2128060A3 (fr
EP2128060A2 (fr
Inventor
Marc Steuer
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.)
SPM Steuer GmbH and Co KG
Original Assignee
SPM Steuer GmbH and Co KG
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.)
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Publication date
Application filed by SPM Steuer GmbH and Co KG filed Critical SPM Steuer GmbH and Co KG
Publication of EP2128060A2 publication Critical patent/EP2128060A2/fr
Publication of EP2128060A3 publication Critical patent/EP2128060A3/fr
Application granted granted Critical
Publication of EP2128060B1 publication Critical patent/EP2128060B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
    • B41F19/062—Presses of the rotary type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0753—Roller supporting, positioning, driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0782—Layout of the complete embossing machine, of the embossing line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2219/00—Printing presses using a heated printing foil
    • B41P2219/20—Arrangements for moving, supporting or positioning the printing foil
    • B41P2219/21—Supports for the unwinding roll; Braking devices for the unwinding roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/413—Supporting web roll
    • B65H2301/4137—Supporting web roll on its outer circumference
    • B65H2301/41386—Supporting web roll on its outer circumference fixed or flexible frictional surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Definitions

  • the invention relates to a foil stamping machine according to the preamble of claim 1.
  • a material layer to be embossed for example a printing material sheet or a printing material web
  • a foil embossing machine which is between an embossing tool carrier device and a counterpressure element, for. B. a counter-pressure cylinder or a counter-pressure plate is formed.
  • the embossing tool carrier device carries one or more embossing tools which can be heated during hot stamping by means of a heating device.
  • the embossing tool carrier device can, for example, have a flat shape - in the case of so-called round-flat machines or flat-flat machines - or a cylindrical one Form - in so-called round-round machines or rotary machines - have.
  • the field of application of the claimed invention are film embossing machines in round-flat technology.
  • the embossing tool carrying device is formed by an embossing foundation guided linearly in a horizontal direction in a machine bed of the machine. In circular-flat machines, this usually works together with a stamping cylinder arranged with a horizontal axis of rotation above the machine bed.
  • At least one stamping foil web is guided through the embossing gap in such a way that it has the same state of movement during the embossing interval as the material layer to be embossed.
  • embossing material located on the embossing foil web for example discrete stamping units lying one behind another, such as images, texts and / or holograms, or a part of a color layer or metal layer to be coated, is transferred to the material layer under the action of pressure and temperature.
  • the stamping foil web is drawn off and forwarded by a film transport device from a normally roll-shaped film supply, the spent stamping foil is removed and disposed of.
  • the film transport device which will also be referred to as a "film plant” hereinafter, has one or more control devices actively involved in the control of the film web movement to accurately determine the preferred length of the embossing film web in film advancement according to a control program.
  • the active control devices include, for example, the so-called clock rollers (or control rollers), which are in slip-free rolling contact with the embossing foil web and are precisely controlled with respect to their rotation angle.
  • a plurality of passive devices eg deflection rollers and / or air deflection rods, are generally provided in the film factory. to determine the course of the embossing foil web (s) through the film factory.
  • successive embossing on the substrate have a certain distance from each other. Since it would be uneconomical to keep the corresponding embossing units or ink layer areas at the same distance on the embossing film web, it is desirable to optimize film consumption that one behind the other to be embossed ink layer areas or consecutive embossing units are closer together on the embossing film than consecutive embossing on the substrate. This goal can be achieved by a discontinuous film preference. During the stamping interval, the stamping foil web is not moved with respect to the stamping foundation.
  • the embossing foil web moves with the embossing foundation from a starting position, which is taken before the beginning of the embossing interval, to a stop position, which is taken after the end of the embossing interval before the start of the return movement of the embossing foundation.
  • the film advantage in which fresh stamping foil web is withdrawn from the film supply, normally takes place after the end of a stamping interval, while the stamping foundation is in its return movement from its stop position to the starting position. Even with flat flat machines, the film preference takes place between the embossing intervals.
  • the film supply is located in a film storage container. This is attached to the front of the stamping foundation in round-flat machines and moves back and forth with the stamping foundation. Since it can happen that foils of different colors for different motif sizes lie next to one another in the foil reservoir, the foil consumption during production can be different for each supply roll. In this case, the roll diameter of the individual supply rolls changes differently during production. Therefore, in film embossing machines in round-flat technology, film brake devices are provided for producing web tension between the supply reels and a first control device of the film work immediately following the supply reel. The film brake devices can be designed so that each supply roll within the film supply device can be braked individually.
  • separating plates are mounted within the film storage container between the adjacent supply rolls, which can be pressed with adjustable spring force to the end faces of supply rolls.
  • film brake devices engage in the center of the supply roll, so for example on a cylindrical cardboard tube, which serves as a carrier for the embossed foil web wound thereon.
  • mechanical, electrical and / or magnetic brakes are usually used.
  • the components required for this must be found in the film reservoir.
  • this braking technology can be used only with a correspondingly large distance between the rollers. Since large distances between the rollers are not acceptable or possible with many embossing motifs, the possible uses of such electrical or magnetic film brake devices are limited.
  • the mass to be braked decreases, so that the braking force should be changed accordingly.
  • the patent US 3,721,185 shows a foil stamping machine with an embossing mill comprising a movable flat embossing foundation and as a counter-pressure element embossing cylinder, which is arranged with a horizontal axis of rotation above the machine bed.
  • a film storage container for receiving at least one supply roll is attached, which is movable back and forth with the embossing foundation.
  • the EP 1 593 503 A2 describes a flat-plate flat embossing machine in which the embossing has a vertically movable embossing table, which cooperates with a plate-shaped counter-pressure element.
  • the film web guide for this flat embossing printing machine has film webs, which are guided by unwinding rollers on the embossing table.
  • the film web guide has a braking and guide wall in front of the embossing table and film feed devices for a plurality of film webs after the embossing table. Between the unwinding rollers and the embossing table, at least one flat braking and guiding wall acts as a film tensioning device.
  • the FR 2 607 072 describes another foil embossing machine in round-flat technique.
  • the foil stamping machine should be easy and convenient to use and easy to convert to adapt to different stamping tasks.
  • the invention provides a foil stamping machine having the features of claim 1.
  • a foil embossing machine is distinguished from generic foil embossing machines of the prior art in that it has a foil brake device, which is designed to generate a braking force acting on the embossing foil web at a distance from the supply roll.
  • the embossing film is thus not slowed down at the supply roll, but at the already unwound from the supply roll film web.
  • the force exerted by the film brake device on the film web braking force is independent of the roll diameter of the respective supply roll and thus independent of the film consumption.
  • the machine downtimes can thereby be considerably reduced, as a result of which the productivity of the film embossing machine is considerably improved.
  • the invention Compared to the known solutions with brake application in the center of the supply roll, restrictions on the mutual spacing of supply rolls are eliminated by the invention, so that the embossing film machine is much more flexible and can be used for a wide variety of embossing tasks.
  • the braking force preferably acts on the respective embossing foil web immediately after the supply roll, that is still in the region of the foil supply container.
  • a brake-effective assembly of the film brake device between a directly serving for receiving supply rolls, e.g. arranged trough-shaped roller receptacle of the film storage container and the embossing foundation.
  • the film brake device is designed as a pneumatic film brake device.
  • the braking force can thus be generated and adjusted with the aid of the generation of differences in air pressure.
  • a pneumatic film brake device can attack particularly gently and gently on the sensitive embossing film webs. It can also be constructively relatively easily constructed without moving parts and can therefore be integrated in a small footprint in the limited space available in the area of the film storage container.
  • the film brake device can also be constructed with the aid of movable brake elements which engage the stamping foil webs and can be controlled, for example, mechanically, electrically or electromechanically. .
  • the pneumatic film brake device may have at least one perforated film guiding device which has a front surface designed as a guide surface for embossing film webs, which has a plurality of perforations through the back of the film guiding device in a working region, the back side being connected or connectable to a vacuum generator.
  • the film guiding device may be a perforated sheet metal part in which a relatively narrow strip with perforations extends over the entire useful width of the stamping foundation.
  • the foil brake device has a measured across the direction of the embossing foil overall useful width and is divided over the total useful width in several individually adjustable and thus independently usable zones. It can e.g. two, three, four, five, six, or more zones. Preferably, between 5 and 20 zones are provided, in particular between 8 and 16 zones.
  • the zones may have identical or different zone widths. For example, if only a portion of the total useful width is to be utilized, in one embodiment, unused areas of a perforated film guide may be mechanically or otherwise closed or deactivated to avoid the pneumatic film brake being in those areas that are not covered by a film web are covered, false air pulls.
  • a division of the total useful width in independently usable zones is also used in other embodiments to adjust the braking force of the film brake device in the individual zones individually and independently of other zones and possibly to change.
  • this can be achieved, for example, by using one or more venturi nozzles per zone.
  • the film brake device is configured for adjustment of the braking force acting on the embossing film web during operation of the film embossing machine.
  • this can be achieved in a simple manner by setting or adjusting the air pressure or negative pressure responsible for the braking force generation.
  • the braking force or the negative pressure responsible for this can be changed, for example, via a central valve while the machine is running become. If, for example, the suction force is increased in embodiments with a perforated film guiding device, the frictional force which builds up between the perforated guiding surface and the embossing film web sliding thereon also increases correspondingly.
  • the adjustment or adjustment of the braking force acting on the stamping foil web can also be realized in the case of non-pneumatic film brake devices, for example by electrical actuation of drives of corresponding brake elements.
  • At least one roller braking device acting directly on a supply roll is provided.
  • dividing plates or other subdivision devices can be used between the film rolls, which ensure precise lateral positioning of the film rolls, that is to say lateral guidance transversely to the unwinding direction.
  • the side guide elements can be pressed with little force to the end faces of the film rolls, for example by means of a suitable spring load.
  • the basic braking force caused by these direct brake devices can be very low, so that they do not have to be changed during the production process. Due to the action of the direct braking device, the supply rolls can be easily braked so that they do not run after a film advantage and in the direction reversal of the embossing foundation.
  • the embossing film web must be located in the embossing gap between the underlying embossing foundation and the embossing cylinder rolling over it or a flat counterpressure element which carries the printing material.
  • the intended for embossing section of the embossing film web spans itself between the film supply and the film supply immediately following the first control device of the film factory.
  • the first control device of the film work immediately following the film supply is a deflecting device fixedly mounted in relation to the machine bed. This deflection does not move with the embossing foundation, but is fixed relative to the position relative to the machine bed.
  • the fresh, still unused embossing foil web is substantially only during the embossing interval in the immediate vicinity or on the types of heated embossing foundation, outside the embossing interval, however, can be performed at a sufficient distance from the heated surface, so that a possibly harmful pre-activation of the sensitive material is avoided.
  • the embossing quality can be improved, in particular when using sensitive embossing foils.
  • one of the first control device immediately following second control device of the film factory is arranged at a large distance above the plane of the first control device, so that the embossing film web can be led away immediately behind the first control device steeply upwards.
  • the thermal pre-activation of the embossing foil web is avoided, and this also improves the accessibility of the embossing foundation in comparison to conventional solutions in which the embossing foil web is permanently guided at a short distance above the embossing foundation.
  • the vertical distance between the Levels of the first control device and the second control device may be, for example, more than 30 cm or more than 40 cm or more than 50 cm or more than 60 cm or more than 70 cm or more than 80 cm.
  • the frame-fixed deflection device can be designed, for example, as a movably mounted deflection roller, if appropriate also as a permanently installed deflection rod.
  • the frame-fixed deflection device is a so-called air rod, which is understood here to mean a device for contactless guiding of a material web, in which an air cushion is formed between the curved guide surface of the air rod and the guided material web.
  • the wall of the air rod is provided for this purpose at least in a guide region with passage openings through which compressed air pressed into the interior of the air rod can escape.
  • the film plant has a preferred with respect to the machine bed frame mounted preferred package with at least one controllable with respect to their rotation angle clock roller.
  • the preferred package is disposed a relatively large distance of at least 40 cm or at least 50 cm above the plane of travel of the embossing foundation, so that the accessibility of the embossing foundation for maintenance or for the exchange of embossing types by the preferred package is not hindered.
  • the film factory usually has a film memory with a variable memory length.
  • This film storage is preferably arranged between the first control device of the film factory and the preferred package.
  • the film storage can be mounted fixed to the frame like the preferred package.
  • the film storage is arranged at a distance of at least 40 cm or at least 50 cm above the plane of movement of the embossing foundation, so that the accessibility of the embossing foundation is not hindered by the film memory.
  • the film store is preferably designed as a horizon store.
  • the term "horizontal storage” here means that the direction in which changes the effective storage length of the film storage during use, is oriented substantially horizontally.
  • the film storage in some embodiments, includes a dancer roll system having rollers movable in groups toward and away from each other, between which film loop sections are passed.
  • the horizontal orientation of the film storage makes it possible to provide a relatively large vertical distance between the plane of movement of the embossing foundation and the film store arranged above it, even with a large storage capacity of the film storage at a total compact height dimensions of the machine, so that the embossing foundation for maintenance or retooling without obstruction by the film storage is accessible.
  • FIG. 1 shows a schematic side view of an embodiment of a sheet-processing foil stamping machine in round-flat technique.
  • the foil embossing machine 100 has an embossing unit 110, which comprises an embossing foundation 130 guided horizontally movably on the machine bed 120 of the machine and an embossing cylinder 140 arranged with a horizontal axis of rotation above the machine bed and serving as a counterpressure element. Between the embossing foundation 130 and the embossing cylinder 140, an embossing gap 145 is temporarily formed during operation of the device when the embossing foundation is located below the embossing cylinder in its horizontal linear reciprocating movement.
  • the embossing foundation 130 is reciprocated horizontally by a drive arranged inside the machine bed along linear guides and is intended to carry replaceable embossing tools (types) 132 on its upper side facing the embossing cylinder.
  • a heater integrated which makes it possible to heat the embossing tools during operation to temperatures well above 100 ° C.
  • On the circumference of the embossing cylinder are gripper systems 142, each grabbing the leading edge of a sheet and pull on the lateral surface 144 of the uniformly rotating embossing cylinder. During the gripping process, an alignment of the printing material sheet takes place.
  • the hanging with its leading edge on the circumference of the embossing cylinder arc is guided in the rotation direction shown (arrow) of the printing cylinder from left to right through the embossing gap 145 and thereby embossed in a manner to be explained later.
  • the embossed material sheet is transferred to a delivery system 164, which successively conveys the printed material sheets onto the storage stack 166 arranged below the feed stack.
  • the surface of the material sheet to be printed has a speed which (depending on the material thickness of the sheet) substantially corresponds to the peripheral speed of the lateral surface 144 of the continuously rotating embossing cylinder.
  • At least one embossing foil web 170 is moved through the embossing gap 145.
  • Those devices which guide the embossing foil web and control the preferential movement of the embossing foil web belong to the so-called film plant 180 of the foil embossing machine.
  • the embossing foil web is usually very thin (between 10 ⁇ m and 20 ⁇ m) and usually consists of one relatively viscous carrier film made of plastic, on the front side of a layer system with a thermally activated separation layer, the actual embossing layer (for example, ink layer or metal layer or hologram or frames), and a thermally activated hot melt adhesive layer is applied, which forms the substrate facing the substrate 172 of the embossing film.
  • the fresh, as yet unused embossing foils are in the form of supply rolls 134 in a trough-shaped foil storage bin 136, which is attached to the front of the embossing foundation and together with this during the embossing interval, i. during the printing phase, runs under the embossing cylinder from left to right. Since the foil storage container 136 projects beyond the level of the embossing types 132 with its upper side, a recess 146 is provided in the embossing cylinder 140 outside the circumferential region 144 which is required during embossing, which allows the foil supply container 136 to be passed under this without contact with the embossing cylinder.
  • the stamping foil web runs through the stamping gap at the same speed as the material sheet to be printed.
  • the linearly displaceable embossing foundation 130 is accelerated from its starting position A shown in the figure to the left of the embossing cylinder so that the embossing tools also have the same speed during the embossing interval as the material sheet to be embossed and the embossing foil web guided between the material sheet and the embossing tool.
  • the embossing unit for example part of a color coat
  • the embossing foundation After the embossing foundation has been moved in line during the embossing interval in synchronism with the sheet of material and the embossing foil web, it is decelerated after completion of the embossing interval until it reaches the stop position B shown in dashed lines on the right. During the Returning to the start position A, the movement is coordinated so that the returning embossing foundation with the film supply attached thereto runs again through the recess 146 in the embossing cylinder, so that the return of the embossing foundation is possible without contact with the embossing film or the embossing cylinder.
  • the embossing foil web does not move relative to the embossing foundation and is only carried along by it.
  • the film preference takes place by a predefinable, subject-dependent preferred route.
  • the preferred film is controlled by the clock rollers, which rotate for this purpose by a predetermined angle of rotation.
  • the sheeting 180 may include a plurality, e.g. Two, three, four, five or six adjacent embossing foil paths run parallel.
  • the foil unit allows the embossing foil web to be stationary during the embossing interval without relative speed to the embossing foundation and to deduct spent embossing foil in the following idling phase by one motif length in the direction of disposal and thereby to provide fresh embossing foil for the subsequent embossing interval.
  • embossing foil webs are first on a fixed to the machine frame, ie fixed to the frame deflection bar 182 and then steeply up through a foil memory 184 through to the so-called clock rollers 186, which control the film preference and their rotation angle thereto can be controlled by means of the controller 188 of the foil stamping machine.
  • the timing rollers only rotate in one direction to produce the film advantage. Outside the preferential phases, they stand still. A reverse rotation is not intended. It can be provided up to three clock rollers, so that up to three independent film web movements can be realized. Each stroke roller can carry several film webs if they have the same motion profile.
  • the clock rollers are combined in a so-called preferred package 189, which in the film embossing machine 100 fixed to the frame, ie on the machine frame itself, is attached. From the cycle rollers, the used film webs are guided to take-up rollers 190, which are also mounted fixed to the frame.
  • the embossing foundation 130 moves from the starting position A shown below to the embossing cylinder 140 to the stopping position B shown on the right in dashed lines.
  • the supply rollers 134 located on the front side of the embossing foundation in the film storage container 136 are carried along and under passed through the embossing cylinder.
  • the embossing foundation 130 moves under the frame-fixed deflection bar 182.
  • the film supply with the embossing foundation moves with.
  • the stamping foil web is not moved in this phase relative to the stamping foundation.
  • a stamping foil web section is spanned with increasing length, since the distance between the supply roll and the frame-fixed deflecting device increases.
  • a removal of the embossing foil web from the supply roll is prevented in this phase by a later explained in more detail foil brake device whose brake active assembly 210 holds the embossing foil web between reservoir 136 and the heated part of the embossing foundation.
  • the film supply is already beyond the embossing cylinder, so that the embossing film web 170 extends from the film supply 134 to the frame-fixed deflecting rod 182 between the underlying embossing foundation 130 and the embossing cylinder 140 arranged above it.
  • This will be in Fig. 1 illustrated by the dashed lines shown 170 'of the stamping foil.
  • the storage length of the film store 184 shortens, i. the foil store releases foil.
  • the storage length of the film store 184 increases again (film store receives film), so that the embossing film web has sufficient web tension at all times.
  • the phase of the backward movement of the film preference also takes place by the clock rollers rotate by a predetermined angle. The film brake is deactivated in this phase so that film web can be pulled off the supply roll.
  • the air rod 182 forms the first, immediately following the film supply control device of the film factory.
  • the immediately following without the interposition of other guide devices second control device 183 of the film factory is arranged at a great distance of more than 40 cm or more than 50 cm or more than 60 cm or more than 70 cm above the plane of movement of the embossing foundation, so that the embossing foil web immediately after the first control device 182 is led away steeply upwards.
  • the immediately following film memory 184 is designed as a horizontal memory and comprises groups of first and second dancer rollers, by means of a drive, not shown in detail, synchronously with the film web movement in the horizontal direction (arrows) can be moved towards and away from each other to vary the (horizontally aligned) memory length of the horizontal memory.
  • the frame-mounted film storage is also located far above the stamping foundation.
  • the tact rollers 186 which are combined in the preferred package 189, are mounted fixed to the frame above the horizontal store 184 and deliver the embossing foil web to frame-mounted take-up reel rollers 190, which rotate synchronously with the cycle rollers when film advancement takes place.
  • the special type of film guide has advantages over conventional systems, among other things in the quality of the embossing result and handling. Because the embossing foil webs are led away steeply upwards immediately behind the first control device 182, they are not permanently exposed to the heat of the embossing tools attached to the embossing foundation but only directly during the embossing process. They are therefore less preactivated. This has the consequence that when using certain film grades an improvement in the embossing result and an increase in performance compared to conventional foil stamping machines can be achieved.
  • the large clear distance D between the plane of movement of the embossing foundation and the lowest-lying components of the film memory also opens up an optimal accessibility of the embossing foundation and thus facilitates the operation of the machine.
  • the mutually movable dancer roller groups can be moved into a special threading.
  • the entire preferred package and the film storage are located in an area far above the stamping foundation and therefore do not interfere with access to the stamping foundation.
  • FIG. 2 shows a diagonal perspective, schematic detail view of the area of the mounted on the front of the embossing foundation 130 film reservoir 136.
  • This has a generally trough-shaped, upwardly open receptacle, which in the exemplary case a trapezoidal cross-section with sloping downwardly converging, flat side surfaces and a flat bottom surface.
  • a supply roll 134 with unconsumed embossing film web, from which an embossing film web portion 170 is guided away substantially parallel to the top 131 of the embossing foundation 130 in the direction of the frame-fixed first deflecting rod 182 of the film factory.
  • a brake active assembly 210 of a pneumatic film brake device 200 is disposed between this and the embossing foundation.
  • the brake-active assembly is designed as a so-called vacuum bar 210. It has a corpus made of thermally insulating plastic with a rectangular cross section, extends transversely to the direction of the embossing foil webs substantially over the entire width of the embossing foundation and is in the direction of the film transport V (arrow) is relatively narrow, for example between 3 and 10 cm narrow.
  • the upper horizontally mounted end cap of the vacuum bar is a sheet steel part and has a plurality of regularly spaced perforations 211 which pass from the flat top to the otherwise closed interior of the vacuum bar.
  • the circular through holes typically have typical diameters between about 0.5 mm and 3 to 4 mm and are grouped in a regular or irregular arrangement so that at certain intervals perforation-free strips 212 are present, seen in the preferred direction V of the embossing film web have no perforations ,
  • the closed to the perforations interior of the vacuum bar is connected to a vacuum generator 220th the film brake device connected, for example, to a vacuum pump.
  • the stamped foil web 170 drawn off from the film supply runs with its relatively insensitive back directly over the perforated upper side of the vacuum strip, the upper side serving as a guide surface for the embossing film web.
  • the embossing foil web is sucked in the region of the perforations covered by it on the guide surface or pressed by the prevailing overpressure on the exposed top of the embossing foil web on the guide surface, so that between the moving embossing foil web and the overflowing Top of the vacuum bar sets sliding friction, the strength of which depends on the pressure difference between the interior of the vacuum bar and the environment.
  • the pneumatic film brake device does not engage the supply roll 134, but rather directly on the stamped foil web already removed from the supply roll.
  • the braking intervention takes place immediately after rolling from the supply roll, ie directly on the reservoir, before reaching the embossing foundation. Due to the direct attack on the unrolled film web, the braking force is independent of the roll diameter and also independent of the film consumption.
  • the vacuum bar is divided into individual adjacent zones Z1, Z2, Z3, etc.
  • 12 zones of equal width are provided, it may be less, for example, between 6 and 11, or more, for example, be provided between 13 and 20 zones.
  • the zones can be individually closed by means of suitable closure devices.
  • mechanical locking devices provided, which are adjustable by means of adjusting screws 215, which are accessible from the top of the embossing foundation and can be operated by means of a tool. Since no mechanically actuated or mechanically adjustable elements are required to generate the braking force, the braking force of the film brake device can be changed by adjusting the effective negative pressure while the machine is running.
  • a central valve for example, be provided within the pneumatic control, a central valve.
  • all zones of the film brake device are connected simultaneously to a vacuum generator, with some zones being mechanically closed and thus deactivated.
  • the negative pressure which can be generated before the individual zones can be set separately for each zone separately from other zones, so that the suction force of the suction strip in the individual zones can be changed individually.
  • one or more venturi nozzles can be provided per zone.
  • the described pneumatic film brake device can be advantageously used in different types of film embossing machines, in particular in round-flat machines or flat-flat machines.
  • the invention also relates to the use of a squeegee of the type described as a film brake, that is to say a pneumatic film brake device as such.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (14)

  1. Machine d'estampage de feuilles avec une estampeuse (110), qui comprend une base d'estampage mobile (130) et, comme élément de contre-pression, un cylindre d'estampage (140) disposé avec un axe de rotation horizontal au-dessus du bâti de la machine, ainsi qu'avec un convoyeur de feuilles (180) comprenant des dispositifs de commande pour le transport d'au moins une bande de feuilles à estamper (170) à travers une fente d'estampage (145) formée entre la base d'estampage et l'élément de contre-pression pendant un intervalle d'estampage, dans laquelle la machine d'estampage de feuilles présente un réservoir de feuilles (136) fixé à un côté antérieur de la base d'estampage et mobile en aller et retour avec la base d'estampage, destiné à contenir au moins un rouleau de réserve (134), et un dispositif de freinage de feuilles (200) est prévu entre le rouleau de réserve et un premier dispositif de commande (182) du convoyeur de feuilles afin de produire une tension dans la bande, caractérisée en ce que le dispositif de freinage de feuilles (200) est conçu de façon à produire une force de freinage agissant directement sur la bande de feuilles à estamper à une distance précédant le rouleau de réserve (134), dans laquelle un ensemble à effet ralentisseur (210) du dispositif de freinage de feuilles (200) est disposé entre un logement de rouleau du réservoir de feuilles (136) destiné à recevoir directement des rouleaux de réserve et la base d'estampage (130).
  2. Machine d'estampage de feuilles selon la revendication 1, dans laquelle le dispositif de freinage de feuilles est conçu comme un dispositif pneumatique de freinage de feuilles (200).
  3. Machine d'estampage de feuilles selon la revendication 2, dans laquelle le dispositif de freinage de feuilles présente au moins un dispositif de guidage de feuilles perforé (210), qui comporte une face antérieure conçue comme une face de guidage pour des bandes de feuilles à estamper et qui présente, dans une zone utile, une multiplicité de perforations (211) qui la traversent jusqu'à la face postérieure du dispositif de guidage de feuilles, dans laquelle la face postérieure est ou peut être raccordée à un générateur de dépression (220).
  4. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle le dispositif de freinage de feuilles (200) possède une largeur utile totale mesurée transversalement à la direction d'extension de la bande de feuilles à estamper et est divisé sur la largeur utile totale en plusieurs zones réglables individuellement (Z1, Z2, Z3).
  5. Machine d'estampage de feuilles selon la revendication 4, dans laquelle la force de freinage du dispositif de freinage de feuilles est réglable individuellement dans les différentes zones (Z1, Z2, Z3) et indépendamment des autres zones.
  6. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle il est prévu au moins un dispositif de freinage de rouleau agissant directement sur un rouleau de réserve, en plus du dispositif de freinage de feuilles agissant sur la bande de feuilles à estamper.
  7. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle le premier dispositif de commande (182) du convoyeur de feuilles, qui suit immédiatement le réservoir de feuilles, est un dispositif de renvoi monté en position fixe par rapport au bâti de machine (120).
  8. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle le premier dispositif de commande (182) du convoyeur de feuilles, qui suit immédiatement le réservoir de feuilles, est une barre pneumatique.
  9. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle un deuxième dispositif de commande (183) du convoyeur de feuilles (180), qui suit immédiatement le premier mécanisme de commande (182), est disposé à une grande distance au-dessus du plan du premier dispositif de commande (182), dans laquelle une distance verticale entre les plans du premier dispositif de commande et du deuxième dispositif de commande vaut de préférence plus de 40 cm.
  10. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle le convoyeur de feuilles comporte un paquet de traction en avant (189) monté en position fixe par rapport au bâti de machine, avec au moins un rouleau de cadence (186) pouvant être commandé au niveau de sa vitesse de rotation, dans laquelle le paquet de traction en avant est disposé de préférence à une distance d'au moins 40 cm au-dessus du plan de déplacement de la base d'estampage (130).
  11. Machine d'estampage de feuilles selon l'une quelconque des revendications précédentes, dans laquelle le convoyeur de feuilles comporte un accumulateur de feuilles (184) avec une longueur d'accumulation réglable pour la compensation entre un mouvement discontinu de la bande de feuilles à estamper dans la région de la fente d'estampage (145) et une évacuation de la bande de feuilles à estamper, dans laquelle l'accumulateur de feuilles est monté en position fixe de préférence entre le premier dispositif de commande (182) du convoyeur de feuilles et le paquet de traction en avant (189).
  12. Machine d'estampage de feuilles selon la revendication 11, dans laquelle l'accumulateur de feuilles est conçu comme un accumulateur horizontal (184), dans lequel la direction, dans laquelle la longueur utile d'accumulation de l'accumulateur de feuilles varie pendant l'utilisation, est orientée essentiellement horizontalement.
  13. Machine d'estampage de feuilles selon la revendication 11 ou 12, dans laquelle l'accumulateur de feuilles (184) est disposé à une distance d'au moins 40 cm au-dessus du plan de déplacement de la base d'estampage (130).
  14. Machine d'estampage de feuilles selon l'une quelconque des revendications 11 à 13, dans laquelle l'accumulateur de feuilles (184) comprend un système de rouleaux tendeurs avec des rouleaux mobiles par groupe les uns vers les autres et inversement, entre lesquels des parties de boucles de feuilles sont guidées.
EP09005195.4A 2008-05-28 2009-04-09 Machine d'estampage de feuilles Active EP2128060B1 (fr)

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DE200810026983 DE102008026983A1 (de) 2008-05-28 2008-05-28 Folienprägemaschine

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DE102010028836A1 (de) * 2010-05-11 2011-11-17 Manroland Ag Folienspeicher in einer Vorrichtung zum Kaltfolienprägen
DE102016209328A1 (de) * 2016-05-30 2017-11-30 Armin Steuer Folienprägemaschine
CN111515558B (zh) * 2020-04-29 2021-10-08 杭州富阳数马装饰工艺品有限公司 一种布料裁剪机

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DE102010028836A1 (de) * 2010-05-11 2011-11-17 Manroland Ag Folienspeicher in einer Vorrichtung zum Kaltfolienprägen

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DE1958824B1 (de) 1969-11-22 1971-05-27 Heidelberger Druckmasch Ag Einrichtung zum Heisspraegedruck mit Farbrollenfolien
US3880076A (en) * 1972-10-11 1975-04-29 Said James A Black By Said Har Web registration with web pull-back and skewing means
FR2607072A1 (fr) 1986-11-21 1988-05-27 Cumenal Daniel Installation pour dorure a chaud utilisant une machine typographique du type presse a cylindre
JP3263937B2 (ja) * 1994-03-29 2002-03-11 凸版印刷株式会社 画像転写方法及びその装置
DE69525802T2 (de) * 1994-09-28 2002-08-01 Toppan Printing Co Ltd Ein Bilderzeugungsgerät
DE9420707U1 (de) * 1994-12-24 1995-02-16 Steuer, Armin, 71111 Waldenbuch Präge-Rotationsmaschine
DE202004003746U1 (de) * 2004-03-10 2004-05-19 m-tech AG Vorrichtung zum Übertragen von Material von einer Heissprägefolie auf ein Druckgut
EP1593503B1 (fr) * 2004-05-04 2013-06-26 Maschinenfabrik Gietz Ag Dispostif de guidage du film d'une machine de dorure à plat

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Publication number Priority date Publication date Assignee Title
DE102010028836A1 (de) * 2010-05-11 2011-11-17 Manroland Ag Folienspeicher in einer Vorrichtung zum Kaltfolienprägen

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DE102008026983A1 (de) 2009-12-03
EP2128060A2 (fr) 2009-12-02

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