EP2255971B1 - Vorrichtung und Verfahren zum Digitaldrucken auf gesinterten und geschäumten Polystirolbehältern - Google Patents

Vorrichtung und Verfahren zum Digitaldrucken auf gesinterten und geschäumten Polystirolbehältern Download PDF

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Publication number
EP2255971B1
EP2255971B1 EP10164123.1A EP10164123A EP2255971B1 EP 2255971 B1 EP2255971 B1 EP 2255971B1 EP 10164123 A EP10164123 A EP 10164123A EP 2255971 B1 EP2255971 B1 EP 2255971B1
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EP
European Patent Office
Prior art keywords
printing
packs
pack
region
roller bed
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.)
Not-in-force
Application number
EP10164123.1A
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English (en)
French (fr)
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EP2255971A1 (de
Inventor
Andrea Schirato
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Errevi Srl
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Errevi Srl
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Publication date
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Priority to PCT/EP2010/068156 priority Critical patent/WO2011147485A1/en
Publication of EP2255971A1 publication Critical patent/EP2255971A1/de
Application granted granted Critical
Publication of EP2255971B1 publication Critical patent/EP2255971B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
    • B41J3/286—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers on boxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0081—Sheet-storing packages, e.g. for protecting the sheets against ambient influences, e.g. light, humidity, changes in temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/26—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for marking or coding completed packages

Definitions

  • the present invention relates to an apparatus for digital printing on articles constituted by containers made of sintered expanded polystyrene.
  • a first widely used method for graphic customization of packages is screen printing.
  • this printing utilizes single- and two-component resins that require, for cleaning, the use of solvents which, together with the gases released by them, attack the EPS; moreover, the production of the frames is constrained by extreme graphic inflexibility.
  • the definition that can be obtained is barely sufficient; moreover, the oil-based inks used dry with difficulty and cause smudging problems.
  • the method is usually monochromatic; however, it is possible to print in multiple colors, but with very high costs.
  • Another known method is constituted by tampographic printing, which allows to obtain multiple-color prints with good definition and is used to customize, for example, disposable beer glasses.
  • the printing system is inflexible, because the pad cannot be modified and has difficulties in managing both the movement under the press, which entails introducing the parts individually, causing a poor production capacity, and the necessary and frequent cleaning caused by the use of single- and two-component resins.
  • This solution in fact describes a system for processing single prepunched cardboard sheets, which are sent one by one at a conveyor, which sends them to a unit provided with a screen, which reads a drawing to be reproduced and sends it to a printing unit; such unit can be provided with a photosensitive drum or with a printing head, which by rising and lowering prints on the flat surface of a single cardboard sheet.
  • a unit adapted to overturn the cardboard so as to arrange the printed flat surface toward the conveyor and allow to arrange, on the unprinted flat surface, a series of articles, such as cassettes and CDs.
  • this known solution allows to print a single cardboard sheet at a time, which dries immediately once printed because the cardboard absorbs the ink immediately, and requires, in order to form the box, the preventive placement of the items on the cardboard sheet and then the folding of the various flaps of such sheet.
  • Figure 14 of US 5,884,451 illustrates the use of single cardboard sheets, which are opened and folded in order to form a single box in which the CDs or cassettes are inserted, such single box being then closed and passed by a printing head: in this condition also, besides the drawbacks mentioned earlier, one observes the fact that the surfaces on which printing can be performed are restricted to the upper one and to a single lateral one, since it is not possible to print on the opposite surfaces.
  • Another known method for graphic customization of preformed boxes consists in applying adhesive tapes to the outside of the boxes.
  • This solution has very low costs, but has problems in adhesion, application and color change due to the poor resistance to UV rays if stored outdoors.
  • the tapes may often peel off from their support or from the box, especially in damp environments, with implications of contamination of the product contained in the box.
  • Fasson adhesive made of coated paper which allows good customization even in four-color printing, but with rather high costs depending on the quality of the medium, on the number of colors and on the minimum number of labels, which is usually high.
  • digital four-color printing which however is usually used on paper media, which thus have limited thicknesses and exclusively flat shapes that allow easy management of the printing flow; this method, however ,cannot be used straightforwardly if one wishes to use it by replacing the flat paper media with articles or boxes made of sintered expanded polystyrene, constituted usually by crates whose volume makes it unfeasible to use known digital four-color printing machines.
  • the aim of the present invention is to solve the above mentioned technical problems, eliminating the drawbacks of the cited background art, by providing an apparatus that allows to obtain quickly digital printing on preformed articles, which thus have a given volume, such as boxes or containment crates made of sintered expanded polystyrene.
  • an object of the invention is to provide an apparatus that allows digital printing on preformed articles made of sintered expanded polystyrene with high versatility and adaptability of the printing to the different dimensions of the articles.
  • Another object of the invention is to provide an apparatus that allows to quicken all the steps of the printing process and requires the smallest possible number of manual interventions of the operator.
  • Another object is to be able to achieve, in a short time, the printing of a large number of preformed articles made of sintered expanded polystyrene.
  • Another object is to be able to print, on multiple sides, a large number of preformed articles made of sintered expanded polystyrene.
  • Another object of the present invention is to allow to graphically customize articles made of sintered expanded polystyrene in a quick and easy manner.
  • Another object of the present invention is to provide an apparatus that allows to perform digital printing on articles constituted by boxes or containment crates made of sintered expanded polystyrene, that can be obtained easily starting from commonly commercially available elements and materials and is highly reliable, relatively easy to provide and at competitive costs.
  • the reference numeral 1 designates an apparatus for digital printing on articles, designated by the reference numeral 3, particularly on packs 3a of articles constituted by boxes or crates for containment made of sintered expanded polystyrene and previously stacked on each other and arranged on a chosen side, for example transversely, as in Figures 8 and 9 , or longitudinally, as in Figure 1 , with respect to the apparatus.
  • the apparatus has support and advancement means for the packs 3 a of crates, which comprise a loading area 2 on which the packs 3a of already stacked boxes are deposited; the loading area 2 is arranged at one end of a first accumulation roller bed 4, which is fed continuously by an operator or automatically by way of known means.
  • a second central roller bed 6 is contiguous to the output end of the first accumulation roller bed 4.
  • the second central roller bed 6 is provided, at the output region, with a second stop mechanism 7 for the packs 3a, which divides it into an initial region 8 for arranging the packs 3a, which comprises central centering means 9 and lateral centering means 10 for the packs 3a, and into a subsequent first printing region 11, in which there is at least one first digital printing means 12 provided with adapted movement means 13.
  • the first digital printing means 12 is arranged above the packs 3a and can move both vertically and horizontally with respect to the underlying packs 3 a.
  • Printing occurs at a chosen side of each article 3, in particular at the side that is directed toward the overlying digital printing means 12 and faces it; depending on the arrangement of the packs, printing on the chosen side of the article is obtained (see Figures 1 and 8 ).
  • Printing occurs preferably, but not exclusively, starting from the pack 3a that is directed toward the second central roller bed 6 and then sequentially on the others.
  • an intermediate region 14 which conveys the packs 3a that have already been printed to a first drying region, which is constituted, for example, by a drying oven 15, shown in Figure 1 , or preferably by an overlying hot air conveyance unit 15a, shown in Figures 8 and 9 .
  • the first accumulation roller bed 4, the second central roller bed 6 and the third unloading roller bed 16 are structured in a substantially similar manner.
  • the structure of the second central roller bed 6, which has a supporting structure 18 that is provided completely by means of metallic profiles and rests on feet 19 whose height is adjustable, will be described in detail hereinafter.
  • rollers 20 are associated transversely and rotatably between the shoulders 21 and are advantageously coated with a protective layer 23 made of PVC in order to prevent the articles from being damaged during their movement.
  • the rollers 20 are moved by means of a chain drive driven by a gearmotor 24.
  • the second central roller bed 6 is advantageously provided with rollers with fixed pinion in order to allow the uniformly spaced advancement of the packs of articles.
  • the first accumulation roller bed 4 is provided with motorized rollers or with freewheeling rollers in order to allow the operator to push the articles forward.
  • the third unloading roller bed 16 is provided with fixed pinion rollers in order to allow the continuous advancement of the packs 3a.
  • the first stop mechanism 5 is designed to stop the packs 3a of articles 3 before making them enter the second central roller bed 6, so as to allow the passage in said second roller bed of one pack of articles at a time.
  • the second stop mechanism 7 is designed to stop the packs 3a in the region 8 of the second central roller bed 6 in order to allow the central centering means 9 and the lateral centering means 10 to arrange correctly the chosen pack 3a before printing occurs.
  • the first and second stop mechanisms are structurally identical; thus, by way of example, only the stop mechanism 5 is described, which is composed of a fixed structure 25, provided by means of metallic profiles, which is anchored on the second central roller bed 6, and of a movable part 26, constituted by a vertical movement system 27, which comprises rolling guide spline bearings 28.
  • Upward and downward vertical movement is performed by means of a pneumatic cylinder 29 actuated by a pneumatic electric valve, not shown.
  • an idle roller 30 which is designed to avoid friction between the packs of articles and the movable part during the lifting/lowering movement.
  • the central centering mechanism 9 is constituted by an oscillating lever 31 that retracts between the rollers 20 of the second central roller bed 6, such oscillating lever being provided by substantially L-shaped metallic profiles, in which one wing 31a is linear and anchored to joints 32 with ball bearings in order to allow its rotation, while the other wing 31b, which has an arc-like shape, is made to protrude between two adjacent bearings in the direction of the printing station 11.
  • the joints 32 are installed on a structure 33 that can slide on a first system of linear ballscrew guides 34.
  • the structure 33 is connected to appropriately provided handles 35, which are adapted to impose a manual movement thereof and is provided with positioning pistons 36 with spring-actuated return for interlocking in the stepwise perforations 37 arranged along the sides of the second central roller bed 6.
  • the structure 33 is moved manually, by making it slide along the first system of linear guides 34, and then is positioned correctly by allowing the insertion of the positioning pistons 36 in the stepwise perforations 37.
  • the lever 31 is moved by a first pneumatic cylinder 38 actuated by a pneumatic electric valve.
  • a pressure regulator is also installed in order to avoid an excessive pressure on each pack 3a of articles.
  • the lateral centering means 10 comprise a pusher 39, which is arranged on at least one side of the second roller bed 6, which can move transversely to such second roller bed and thus pushes each pack 3a of articles against a fixed stop 40, which is mounted on the opposite side of the second roller bed 6.
  • the pusher 39 is constituted by two C-shaped parts 41 made of pressed metal plate and is installed on a carriage 42, which can slide on a second system of linear guides with ballscrew sliders, designated with the reference numeral 43.
  • Movement is provided by a second pneumatic cylinder 44 actuated by a pneumatic electric valve.
  • a pressure regulator is installed in order to avoid excessive pressure on the pack 3a.
  • the lateral centering means 10 can also be placed at the initial part of the machine and be used to align the individual articles 3 that constitute the packs 3 a.
  • means for pressing such articles which are constituted by a supporting structure 81 constituted by two shoulders 82a, 82b made of aluminum profiles anchored on the first roller bed 4; in the inner part of such supporting structure, linear guides 83a, 83b are accommodated in order to allow the sliding of sliding blocks 84a, 84b, which are anchored to an alignment frame 85 composed of a free roller bed, which is composed of four idle rollers coated by a protective layer made of PVC in order to prevent damage to the packs of crates made of polystyrene during the passage step.
  • the movement of the alignment frame 85 occurs by means of a pair of pneumatic cylinders 86 or by way of a handwheel.
  • the first digital printing means 12 used is preferably a digital plotter known by the Roland trademark, conveniently adapted and fed with water-based printing colors.
  • the first digital printing means 12 is installed above the packs 3a at the means 13 for its movement that allow its forward/backward movement, along the advancement direction of the second roller bed 6, and its ascent/descent motion with respect to the underlying second roller bed 6.
  • This movement allows to adapt the positioning of the first printing means 12 to the dimensions of the underlying pack 3a of articles on which to print.
  • the movement means 13 are constituted by a base structure 45 and by a lifting assembly 46.
  • the base structure 45 is provided preferably by means of tubular elements and rests on feet 47 whose height is adjustable.
  • This movement occurs by means of a toothed belt 49, which is actuated by a step motor 50 controlled by an appropriately provided encoder and supported on feet 47.
  • the lifting assembly 46 is preferably composed of two columns 51, which can slide on a fourth system, which is arranged vertically with respect to the second roller bed 6, of linear guides 52 with ballscrew sliders actuated by ball bearing nuts 53 with reduced clearance actuated by a ballscrew 54.
  • the device for separating the packs moves them away from the fixed stop 87 in order to prevent such stop from rubbing against it and becoming misaligned, creating drawbacks for the subsequent operations.
  • the device for separating the packs is composed of a pneumatic cylinder 88, which is anchored on the fixed stop 87, and by a disk 89, which is made in PVC in order to avoid marking the pack of crates made of polystyrene, anchored on the stem of the pneumatic cylinder; in the inactive step of the system, the disk retracts inside the fixed stop, while when printing has been completed the pneumatic cylinder pushes the packs of polystyrene crates by spacing the pack of about 10 mm, and then returns immediately to the resting position in order to allow the next pack to be positioned.
  • Figures 17, 18 and 19 illustrate the first printing means 12, or the equivalent second printing means, in which means for correcting the position of the printing heads 98 are highlighted.
  • composition of the packs 3a sometimes involves minute imperfections along the whole length of the pack; this can create friction of the printing head 98 along the pack and slight damage may occur to the head itself, which over time can cause the head to break.
  • the means for correcting the position of the printing heads 98 are constituted by an encoder (not shown) for reading the rising and/or descending motion of the plotter, by a pair composed of a high-precision sensor 99 and receiver 100 arranged in the region of initial printing ("heads zero" point, imaginary printing line with respect to the surface to be printed), by a pair composed of a precision sensor 101 and receiver 102 arranged after the heads 98 of the plotter ("heads zero" point, imaginary printing line with respect to the surface to be printed), by a pair composed of a sensor 103 and a reflector 104 for quickly reading the height of the pack 3a.
  • the heads of the plotter are moved closer to the pack of polystyrene containment crates; at this point the plotter descends quickly until the signal of the pair constituted by the sensor 103 and the reflector 104 is interrupted by the presence of the pack.
  • the speed of descent of the plotter decreases in order to allow the precision sensor 99 and receiver 100 to determine the printing start region ("heads zero" point, the imaginary printing line with respect to the surface to be printed), which is near the printing surface of the pack of containment crates made of polystyrene.
  • the plotter starts to print along the entire pack, while the pair constituted by the precision sensor 99 and receiver 100 arranged in the initial printing region are always active and check any excess imperfections of the pack that can damage the printing heads.
  • the pair constituted by the precision sensor 99 and receiver 100 arranged in the initial printing region ("heads zero" point, imaginary printing line with respect to the surface to be printed) or the pair constituted by the precision sensor 101 and receiver 102 arranged after the heads of the plotter ("heads zero" point, imaginary printing line with respect to the surface to be printed) detects an excess imperfection, correction of the printing heads intervenes, i.e., the plotter rises automatically based on the correction factor set previously on the operator panel.
  • This operation is performed automatically and without stopping printing; the small displacement of the plotter is controlled by an encoder installed on the ascent and/or descent columns of the plotter.
  • a first drying region that comprises, for example, the drying oven 15, shown in Figure 1 , or preferably the hot air conveyance unit 15a, shown in Figures 8 and 9 .
  • such oven is composed of a tunnel-like structure 56, preferably made of pressed metal, with inlet doors 57 and outlet doors 58 that can open and close partially.
  • the movement of the doors 57, 58 occurs by means of a chain drive driven by a gearmotor 59.
  • the electrical control panel 62 comprises all the control logic systems, the controls, the temperature setting systems and a PLC for controlling the movement means 13.
  • the first drying region is preferably constituted by a hot air conveyance unit 15a constituted by a nozzle 70 that can move on a beam 71 of a bridge crane 72 arranged transversely to the apparatus, the beam 71 being also movable at right angles to such apparatus.
  • One or more adapted gearmotors 73a, 73b are provided which, by means of an appropriately provided toothed belt or chain 74 or other interconnection means, move a plate 74 to which the nozzle 70 is connected and which allows the lifting or lowering of the beam 71, since the plate and the beam are movable on appropriately provided guides.
  • the nozzle 70 is connected to a duct 75 for the conveyance of hot air, which is forced by means of an appropriately provided fan 76.
  • Provisions are made for the adjustment of both the temperature and the speed of the movement of the air conveyance unit 15a.
  • a second device for separating the packs 3a is arranged also in the first drying region and is constituted by a pneumatic cylinder 90, which is anchored on a post 91 and on the stem 92 of which a guide 93 is associated transversely and is provided with free wheels 94 in order to avoid marking the pack of crates made of polystyrene.
  • the pneumatic cylinder pushes the pack of polystyrene crates by separating the pack by about 20 mm and then returning immediately in the inactive position in order to allow the subsequent pack to be positioned.
  • each pack 3a is obtained by arranging the individual crates so that they are mutually stacked, such pack being then rotated on a chosen side and arranged along an axis that is longitudinal or transverse to the apparatus.
  • the packs 3a thus obtained and arranged mutually side by side along the entire line are sent until they interact with the first stop mechanism 5, which blocks them, allowing the advancement of one pack at a time.
  • the pack released by the first stop mechanism 5 enters the region 8 of the second central roller bed 6.
  • the second stop mechanism 7 blocks the advancement of the pack 3a and the central centering means 9 and the lateral centering means 10 arrange it correctly in order to perform printing.
  • the second stop mechanism 7 moves downward, allowing the pack 3a to advance in the region 9 where the first digital printing means 12, previously positioned and calibrated by way of the movement means 13, prints on the underlying pack, performing the printing on each one of the crates 3 that form the pack 3a.
  • the unloading roller bed 16 makes the pack advance through the third unloading roller bed 16 to the unloading region 17, from where the operator can unload it and store it in an appropriately provided pallet.
  • the pack 3a is brought at an overturning unit 95, which is designed to pick up the pack of containment crates made of polystyrene, rotate it through 180° and rest it again on the roller bed.
  • the overturning unit 95 is composed of a pair of grip jaws 96, of which one is movable and one is fixed, which can be moved mutually closer or further apart by means of a pneumatic cylinder, arranged transversely to the third roller bed 16, in order to allow grip of the packs of polystyrene containment crates having various dimensions.
  • the pair of grip jaws 96 is installed on a rotating axis 97 in order to allow the rotation through 180° from left to right of the pack of crates and its return into position in order to pick up another pack.
  • a pressure regulator is installed which is calibrated beforehand and is controlled by appropriately provided and known sensors.
  • Rotating cylinders are installed at the two ends of the rotating axis 97 and are in turn installed on a system of linear guides in order to allow to raise and/or lower the axis of rotation to grip the various models of packs of crates made in polystyrene.
  • the height of the axis 97 is adjustable according to the format of the pack of polystyrene crates to be treated.
  • the overturning unit 95 there is optionally an automatic device for pressing the crates, followed by a second printing means, similar to the first printing means 12, so as to print a further side of the crates 3 of each pack 3a; this is followed by a second drying region, similar to the first drying region.
  • the apparatus allows to obtain digital printing on articles with high versatility and adaptability of the printing to the different dimensions of the articles, since it is sufficient to merely adapt the arrangement of the first and/or second digital printing means according to the dimensions of the underlying individual article that composes the pack 3 a.
  • the apparatus moreover, allows to quicken all the steps of the printing process and requires few manual interventions of the operator, allowing to customize graphically articles made of sintered expanded polystyrene quickly and easily.
  • the printing means is fed using water-based inks allows to eliminate the risks of toxicity, protecting the health of the users of the mechanism, limiting the disposal of any residues during the cleaning of the digital printing means 12, and finally allowing the use of such apparatus for printing in the most disparate sectors, which range from the medical sector to the food sector, to the gift and fancy goods sector, et cetera.
  • the apparatus according to the invention has been conceived particularly for printing on preformed articles made of sintered expanded polystyrene, it may nonetheless be used, more generally, for preformed articles also made of another material.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (16)

  1. Eine Vorrichtung zum Drucken auf Gegenständen (3), die aus Behältern bestehen, die aus gesintertem und geschäumtem Polystyrol hergestellt sind, Folgendes umfassend: Trag- und Beförderungsmittel zum Tragen und zur Beförderung der Gegenstände, die zuvor aufeinander gestapelt und auf einer ausgewählten Seite angeordnet wurden, um Pakete (3a) zu bilden, mindestens ein erstes digitales Druckmittel (12), das sich axial und in rechten Winkeln zu den Trag- und Beförderungsmitteln bewegen kann und oberhalb der Pakete (3a) angeordnet ist, mindestens einen ersten Trocknungsbereich und einen Bereich zum Entladen der Gegenstände (3) von der Vorrichtung (1),
    dadurch gekennzeichnet, dass die Trag- und Beförderungsmittel Folgendes umfassen: ein erstes Rollenbett (4), das kontinuierlich beschickt werden kann, mit einem Ladebereich (2), der an einem Ende davon angeordnet ist, ein zweites zentrales Rollbett (6), das an ein Ausgangsende des ersten Rollenbetts (4) angrenzt, einen ersten Stoppmechanismus (5) für die Pakete (3a), der zwischen dem Ausgangsende des ersten Rollbetts (4) und dem zweiten Rollbett (6) angeordnet ist und der ausgebildet ist, um den Durchlauf, in dem zweiten Rollbett (6), eines einzigen Pakets (3a) von Gegenständen (3) zu einer gegebenen Zeit zu ermöglichen, wobei die Pakete (3a) in Längsrichtung oder Querrichtung auf den Beförderungsmitteln angeordnet sind, wobei das zweite zentrale Rollbett (6) an einem Ausgangsbereich davon mit einem zweiten Stoppmechanismus (7) für die Pakete (3a) ausgestattet ist, der das zweite Rollbett (6) in einen ersten Bereich (8) zur Anordnung der Pakete (3a) und einen sich daran anschließenden ersten Druckbereich (11) unterteilt, in dem sich die mindestens einen ersten digitalen Druckmittel (12) befinden, ausgestattet mit geeigneten Bewegungsmitteln (13), und zentrale (9) und seitliche (10) Zentrierungsmittel, in dem ersten Bereich (8) bereitgestellt sind, um im Verhältnis zu den ersten digitalen Druckmitteln (12) korrekt zentriert ein einziges Paket (3a) in dem sich anschließenden ersten Druckbereich (11) zu positionieren.
  2. Die Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass das erste digitale Druckmittel (12) oberhalb der Pakete (3a) angeordnet ist und sich sowohl vertikal als auch horizontal im Verhältnis zu den darunter liegenden Paketen (3a) bewegen kann, um auf einzelne Gegenstände (3) mit gewählten Maßen zu drucken, wobei das Drucken an mindestens einer Seite jedes Gegenstands (3) stattfindet, insbesondere an der Seite, die zu dem darüber liegenden ersten digitalen Druckmittel (12) hin gerichtet ist und ihm gegenüberliegt.
  3. Die Vorrichtung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass sie weiter einen intermediären Bereich (14) umfasst, der sich in dem zweiten zentralen Rollbett (6) nach dem ersten Druckbereich (11) befindet, wobei das Drucken im Wesentlichen von dem Paket (3a) ausgehend stattfindet, das zu dem zweiten zentralen Rollbett (6) hin gerichtet ist, und dann nacheinander auf den anderen, wobei der intermediäre Bereich (14) die Pakete (3a), bereits bedruckt, in den ersten Trocknungsbereich befördert, der entweder aus einem Trocknungsofen (15) oder aus einer Heißluft-Beförderungseinheit (15a) besteht und von dem bzw. der sich anschließend ein drittes Ablade-Rollbett (16) erstreckt, das die bereits bedruckten Pakete (3a) in einen Abladebereich (17) oder eine Umkippeinheit (95) befördert, gefolgt von einem zweiten digitalen Druckmittel (12) und von einem zweiten Trocknungsbereich.
  4. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das zweite Rollbett eine tragende Struktur umfasst, die seitlich und in Längsrichtung mit zueinander parallelen Schultern (21) ausgestattet ist, von denen sich Begrenzungsführungen (22) aufwärts erstrecken, wobei Rollen (20) drehbar und transversal zwischen den Schultern (21) assoziiert sind und mit Hilfe eines Kettenantriebs bewegt werden, der von einem Getriebemotor (24) angetrieben wird.
  5. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass sie ein erstes und ein zweites digitales Druckmittel (12), mit einer dazwischen angeordneten Umkippeinheit (95), umfasst, die oberhalb der Pakete (3a) an den Mitteln (13) für ihre Bewegung angeordnet sind, die Mittel zur vertikalen translatorischen Bewegung umfassen, die sowohl ihre Vorwärts- / Rückwärtsbewegung entlang der Beförderungsrichtung des zweiten Rollbetts (6) als auch ihre Hub- /Senkbewegung im Verhältnis zur Anordnungsebene des darunter liegenden zweiten Rollbetts (6) ermöglichen, um so die Positionierung der Druckmittel (12) an die Maße des darunter liegenden Pakets (3a) und daher der einzelnen Gegenstände (3) anzupassen, auf die etwas aufgedruckt werden soll, wobei die Mittel für die vertikale translatorischen Bewegung einen Hubaufbau umfassen, der zwei Säulen für jede Seite hat, welche auf einem ersten System linearer Führungen gleiten können, die vertikal zu den Gegenstand-Trag- und Beförderungsmitteln angeordnet sind, der von einer Basisstruktur getragen wird und mit einer Kugelumlaufspindel verbunden ist, die über einen Kettenantrieb mit einem Betätigungssystem verbunden ist.
  6. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die zentralen Zentrierungsmittel (9) einen schwingenden Hebel (31) umfassen, der sich zwischen Rollen (20) zurückzieht, die das zweite zentrale Rollbett (6) bilden, wobei der schwingende Hebel (31) von im Wesentlichen L-förmigen Metallprofilen gebildet wird, in denen ein Flügel (31a) linear und mit Kugellagern an Gelenken (32) verankert ist, um seine Drehung zu ermöglichen, während der andere Flügel (31b), der bogenförmig ist, zwischen zwei der Lager (20), die nebeneinander liegen, in die Richtung der Druckstation (11) herausragen gelassen werden, wobei die Gelenke (32) auf einer Struktur (33) installiert sind, die auf einem ersten System linearer Kugelumlaufspindelführungen (34) gleiten kann, das mit passend bereitgestellten Griffen (35) verbunden ist, die ausgebildet sind, um eine manuelle Bewegung davon zu verursachen, und mit Positionierkolben (36) mit Federrückstellung zum Einrasten in den schrittweisen Durchbohrungen (37) ausgestattet ist, die entlang den Seiten des zweiten zentralen Rollbetts (6) angeordnet sind, wobei der Hebel (31) von einem ersten Druckluftzylinder (38) bewegt wird, der von einem pneumatischen Elektroventil betätigt wird.
  7. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die seitlichen Zentrierungsmittel (10) einen Schieber (39) umfassen, der auf mindestens einer Seite des zweiten Rollbetts (6) angeordnet ist und sich transversal zu dem zweiten Rollbett(6) bewegen kann und so jedes Paket (3a) von Gegenständen (3) gegen einen festen Anschlag (40) schiebt, der auf der gegenüberliegenden Seite des zweiten Rollbetts (6) montiert ist, wobei der Schieber (39) aus zwei Teilen (41) besteht, die aus gepresstem Metall bestehen, C-förmig sind auf einem Schlitten (42) installiert sind, der mit Kugelumlaufspindelschiebern auf einem zweiten System linearer Führungen (43) gleiten kann, wobei Bewegung von einem zweiten Druckluftzylinder (44) verursacht wird, der von einem pneumatischen Elektroventil betätigt wird.
  8. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass sie einen ersten Druckbereich und einen zweiten Druckbereich umfasst, nach welchen sich ein erster Trocknungsbereich und ein zweiter Trocknungsbereich befinden, die jeweils einen Trocknungsofen (15) umfassen, der aus einer tunnelartigen Struktur (56) aus gepresstem Metall besteht, mit Einlasstüren (57) und Auslasstüren (58), die sich teilweise öffnen und schließen können, wobei die Bewegung der Türen (57, 58) mit Hilfe eines Kettenantriebs stattfindet, der von einem Getriebemotor (59) angetrieben wird.
  9. Die Vorrichtung gemäß einem oder mehreren der Ansprüche 1-7, dadurch gekennzeichnet, dass sie einen ersten Druckbereich und einen zweiten Druckbereich umfasst, hinter welchen sich ein erster Trocknungsbereich und ein zweiter Trocknungsbereich befinden, die jeweils eine Transfereinheit (15a) für Heißluft umfassen, welche aus einer Düse (70) besteht, die sich auf einem Balken (71) eines Brückenkrans (72) bewegen kann, der transversal zu der Vorrichtung angeordnet ist, wobei sich der Balken (71) aufgrund der Anwesenheit eines oder mehrerer Getriebemotoren (73a, 73b) auch in rechten Winkeln zu der Vorrichtung bewegen kann, der über einen Zahnriemen (74) oder andere Verbindungsmittel eine Platte (74) bewegt, mit welcher die Düse (70) verbunden ist und das Heben oder Senken des Balkens (71) ermöglicht, wobei die Platte und der Balken auf Führungen beweglich sind und die Düse (70) mit einem Gang (75) zur Beförderung von Heißluft verbunden ist, die mit Hilfe eines Ventilators (76) getrieben wird.
  10. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass sich in dem Bereich, in dem das Drucken stattfindet, ein Anschlag für die Pakete (3a) befindet, an dem eine erste Vorrichtung zum Trennen der Pakete (3a) mit Bezug auf einen ersten Anschlag (87), auch als "Nullpunkt" bezeichnet, positioniert ist, wobei am Ende des Druckens die Trennvorrichtung die Pakete (3a) von dem festen Anschlag (87) fort bewegt, um ihn daran zu hindern, dagegen zu reiben und verstellt zu werden, wobei die Paket-Trennvorrichtung aus einem Druckluftzylinder (88) besteht, der an dem festen Anschlag (87) verankert ist, und einer Scheibe (89), die aus Kunststoff besteht, um keine Abdrücke auf dem Paket zu hinterlassen, die am Schaft des Druckluftzylinders verankert ist, wobei sich während des inaktiven Schritts die Scheibe in den festen Anschlag zurückzieht, während nach Abschluss des Druckens der Druckluftzylinder das Paket von Behältern aus Polystyrol eine ausgewählte Distanz weit schiebt und dann sofort in die inaktive Position zurückkehrt, um die Positionierung des nächsten Pakets zu ermöglichen.
  11. Die Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass sie eine zweite Vorrichtung zum Trennen der Pakete (3a) umfasst, die in dem ersten Trocknungsbereich angeordnet ist, wobei die zweite Vorrichtung aus einem Druckluftzylinder (90) besteht, der an einem Pfosten (91) verankert ist, an dessen Schaft (92) eine Führung (93) transversal angebracht ist, wobei die Führung Freiläufe (94) hat, um Abdrücke auf dem Paket von Behältern aus Polystyrol zu vermeiden, wobei der Druckluftzylinder das Paket von Polystyrolbehältern über eine ausgewählte Distanz schiebt und dann sofort in die inaktive Position zurückkehrt, um die Positionierung des nächsten Pakets zu ermöglichen.
  12. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass nach dem Austritt aus dem ersten Trocknungsbereich das Paket (3a) an eine Umkippeinheit (95) überführt wird, die konstruiert ist, um das Paket von Polystyrolbehältern aufzuheben, um 180° zu drehen und wieder auf das dritte Rollbett (16) zu legen, wobei die Umkippeinheit (95) aus einem Paar von Klemmbacken (96) besteht, von denen eine beweglich ist und eine fest ist, und die mit Hilfe eines Druckluftzylinders näher zueinander oder voneinander fort bewegt werden können, wobei die Umkippeinheit (95) transversal zu dem dritten Rollbett (16) angeordnet ist, um das Greifen von Paketen von Polystyrolbehältern mit verschiedenen Maßen zu ermöglichen, wobei das Paar von Klemmbacken (96) auf einer Drehachse (97) installiert ist, um eine Drehung um 180° des Pakets von Behältern von links nach rechts zu ermöglichen und in die Position zurückzukehren, um ein anderes Paket aufzuheben, wobei zur Sicherstellung, dass der Druckluftzylinder der beweglichen Klemmbacke das Paket nicht zu sehr drückt, ein Druckregler installiert ist und vorkalibriert ist und von Sensoren gesteuert wird, wobei Drehzylinder an den Enden der Drehachse (97) installiert und wiederum auf einem System linearer Führungen installiert sind, um die Drehachse heben und / oder senken zu können, um die verschiedenen Modelle der Pakete von Polystyrolbehältern zu greifen, wobei die Höhe der Achse (97) je nach dem Format des Pakets zu behandelnder Polystyrolbehälter einstellbar ist.
  13. Die Vorrichtung gemäß Anspruch 12, dadurch gekennzeichnet, dass sich nach der Umkippeinheit (95) ein zweites Druckmittel befindet, das ähnlich dem ersten Druckmittel (12) ist und ausgebildet ist, um eine weitere Seite der Gegenstände (3) jedes Pakets (3a) zu bedrucken, gefolgt von einem zweiten Trocknungsbereich, ähnlich dem ersten Trocknungsbereich.
  14. Die Vorrichtung gemäß Anspruch 13, dadurch gekennzeichnet, dass das erste und / oder das zweite Druckmittel (12) Druckköpfe (98) und Mittel zur Korrektur der Position der Druckköpfe (98) haben, wobei die Mittel zur Korrektur der Position der Druckköpfe (98) aus Folgendem bestehen: einem Codierer zum Lesen der Hub- und/oder Senkbewegung eines Plotters, einem Paar, das aus einem Präzisionssensor (99) und einem Empfänger (100) besteht, und zwar angeordnet im Bereich des Ausgangsdruckens, oder Nullpunkts der Köpfe, einem Paar, das aus einem Präzisionssensor (101) und einem Empfänger (102) besteht, angeordnet nach den Köpfen (98), oder am Nullpunkt der Köpfe, einem Paar, das aus einem Sensor (103) und einem Reflektor (104) besteht, zur Schnellablesung der Höhe des Pakets (3a).
  15. Ein Verfahren zum Digitaldrucken auf Gegenständen (3), die aus Behältern bestehen, die aus gesintertem und geschäumtem Polystyrol hergestellt sind, mit Hilfe einer Vorrichtung wie in einem beliebigen der obigen Ansprüche ausgeführt, dadurch gekennzeichnet, dass es folgende Schritte umfasst:
    Aufeinanderstapeln und Anordnen einer Vielzahl einzelner Gegenstände (3) auf einer ausgewählten Seite, um Pakete (3a) zu bestimmen,
    Platzierung von Gruppen der Pakete (3a) auf Trag- und Beförderungsmitteln an dem Ladebereich des ersten Rollbetts (4) und kontinuierliche Zufuhr der Pakete (3a) an das zweite Rollbett (6), wobei der Durchgang eines Pakets (6) zur einer bestimmten Zeit von dem ersten Anschlagmechanismus (5) ermöglicht wird und die Pakete auf den Beförderungsmitteln in Längs-oder Querrichtung angeordnet sind,
    korrekt zentrierte Positionierung eines einzigen Pakets (3a), und zwar durch die Wirkung der zentralen und seitlichen Zentrierungsmittel (9, 10) im Ausgangsbereich (8) des zweiten Rollbetts (6), in dem anschließenden ersten Druckbereich (11), wo das mindestens eine erste digitale Druckmittel (12), das sich axial und in rechten Winkeln zu den Beförderungsmitteln bewegen kann und zur Durchführung des Druckens oberhalb der Pakete (3a) angeordnet ist,
    Bewegung des mindestens einen Druckmittels (12) zum Zwecke seiner Kalibrierung auf den Gegenständen (3), die die Pakete (3a) bilden,
    Drucken jedes einzelnen Gegenstands (3), der jedes der Pakete (3a) bildet,
    Beförderung des bedruckten Pakets (3a) an den mindestens einen ersten Trocknungsbereich, und
    Beförderung des getrockneten Pakets (3a) an den Abladebereich (17).
  16. Das Verfahren gemäß Anspruch 15, dadurch gekennzeichnet, dass es nach dem Trocknungsschritt das Bewegen der Pakete (3a) an einer Umkippeinheit (95) und dann in ein zweites Digitaldruckmittel (12) und anschließend in einen Abladebereich zum Aufheben von der Vorrichtung umfasst.
EP10164123.1A 2009-05-27 2010-05-27 Vorrichtung und Verfahren zum Digitaldrucken auf gesinterten und geschäumten Polystirolbehältern Not-in-force EP2255971B1 (de)

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ITTV2009A000112A IT1395670B1 (it) 2009-05-27 2009-05-27 Apparecchiatura per la stampa digitale su manufatti

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DE102021110638A1 (de) 2021-04-26 2022-10-27 Weber Maschinenbau Gmbh Breidenbach Verfahren zum Etikettieren und/oder Bedrucken einer Abfolge von hintereinander angeordneten Verpackungsformaten

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DE102011007979A1 (de) 2011-01-05 2012-07-05 Till Gmbh Maschine zum Bedrucken von Behältern
CN107598564B (zh) * 2017-09-28 2023-08-15 浙江正泰智能电气有限公司 一种智能壳体装配流水线

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GB9000548D0 (en) * 1990-01-10 1990-03-14 British American Tobacco Co Improvements relating to cigarette packaging machinery
JPH06135119A (ja) * 1992-10-29 1994-05-17 Asahi Chem Ind Co Ltd 紫外線硬化印刷用媒体及び紫外線硬化印刷方法
JPH08119239A (ja) * 1994-10-31 1996-05-14 Sony Corp カートン処理システム及びカートン処理方法
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DE102007021765B4 (de) * 2007-05-09 2010-06-17 Bauer, Jörg R. Vorrichtung zum gleichzeitigen Bedrucken einer Mehrzahl von gleichen Bauteilen mittels eines digitalen Druckverfahrens
JP4995670B2 (ja) * 2007-08-30 2012-08-08 株式会社ミマキエンジニアリング 印刷装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103612862A (zh) * 2013-10-31 2014-03-05 泰信电机(苏州)有限公司 用于电机定子铁芯打标的打标装置
DE102021110638A1 (de) 2021-04-26 2022-10-27 Weber Maschinenbau Gmbh Breidenbach Verfahren zum Etikettieren und/oder Bedrucken einer Abfolge von hintereinander angeordneten Verpackungsformaten

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