EP0707959B1 - Procédé de sérigraphie et dispositif pour la mise en oeuvre dudit procédé - Google Patents

Procédé de sérigraphie et dispositif pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP0707959B1
EP0707959B1 EP95115595A EP95115595A EP0707959B1 EP 0707959 B1 EP0707959 B1 EP 0707959B1 EP 95115595 A EP95115595 A EP 95115595A EP 95115595 A EP95115595 A EP 95115595A EP 0707959 B1 EP0707959 B1 EP 0707959B1
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EP
European Patent Office
Prior art keywords
printing
holder
article
squeegee
screen printing
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.)
Expired - Lifetime
Application number
EP95115595A
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German (de)
English (en)
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EP0707959A1 (fr
Inventor
Norbert Rohwetter
Joachim Hellmeier
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.)
Werner Kammann Maschinenfabrik GmbH and Co KG
Original Assignee
Werner Kammann Maschinenfabrik GmbH and Co KG
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Publication date
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Publication of EP0707959A1 publication Critical patent/EP0707959A1/fr
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Publication of EP0707959B1 publication Critical patent/EP0707959B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0872—Machines for printing on articles having essentially cylindrical surfaces
    • B41F15/0877—Machines for printing on articles having essentially cylindrical surfaces of varying cross-section

Definitions

  • the invention relates to a method and an apparatus for Printing of single objects using the screen printing process.
  • a screen printing machine is known from DE-OS 3730409, where a number of separate, coordinated controllable drive motors for the movement of the individual organs, especially the holder for the object to be printed and the portafilter are provided.
  • the only bracket is attached to the front of the machine so it can be moved back and forth.
  • This machine has low productivity on, since only one bracket is provided, which also over the Pressure range up to a feed conveyor on the one and a discharge conveyor on the other side is movable.
  • After the end of the last printing process and possibly drying Object must first be removed from the holder before then move the bracket back to its original position can be used to record the next object there.
  • a print image that consists of several Colors exist, the low productivity of this device especially clear.
  • the invention is based inter alia on the object program controlled screen printing machines of the above described type so that a greater throughput can be achieved without the number of Printing stations would have to be enlarged. It is also sought that to achieve good print quality Relative movements of those interacting during the printing process Parts, in particular between screen printing stencil, squeegee and object to be printed can be coordinated precisely.
  • the invention proposes that at least two brackets and a special one for each bracket Means of transport are provided and each means of transport driven by a special NC motor for a bracket becomes.
  • the means of transport transports the associated one Bracket preferably along a closed Orbit between a station in which the to printing object is entered into the holder, and one Station in which the printed object from the holder is removed, the means of transport if necessary the linear movements in the individual printing stations transfers to the bracket that during the printing process are required to print object and squeegee in the relative position required for the printing process to hold to each other.
  • each bracket has its own, separately powered means of transport, which is advantageous in the form of a rotating toothed belt has, it is possible to use all brackets regarding their Control transports independently, so that one Bracket with the object she carries, for example several printing stations arranged one behind the other in the transport direction goes through, whereas another bracket independently of which can be brought to the station in which the printed article is removed from the holder and then immediately back to the receiving station if necessary can be moved to include the next object there, without losing the transport steps or the transport speed dependent on the at least one other bracket to be.
  • a special transmission means may be provided about which the rotational movements that the bracket and execute the object she is carrying during the printing process, be transferred to the bracket.
  • This too will expediently uses a toothed belt with a Toothed belt wheel is engaged, which is connected to the bracket is.
  • the individual transmission means are driven also via separate NC motors with the result that the pivoting or rotating movements of the brackets during printing can be carried out with great accuracy, to achieve the desired high print quality. This is especially important when objects with an irregular Cross-sectional shape can be printed.
  • each bracket part is transported by a special toothed belt and further a special toothed belt is provided for each mounting part is the necessary during the printing process Transfer rotational movements to the object. It is the two timing belts for transport and the two timing belts for the transmission of the rotational movements Common NC motor assigned.
  • one-piece brackets when the shape of the Object requires or makes this possible.
  • the inventive design achieved that the respective masses to be moved are proportional are small. This also comes down to the accuracy of the printing process and thus the quality of the printed image.
  • the stencil and squeegee can at least a printing unit can be moved up and down synchronously in order to irregularly shaped objects that occur during printing vertical shifts in the area to be printed to compensate for the object. In this case it is not required that the object be vertical when printed Undergoes shift. In any case, there are at least four program-controlled drives available, their movements with each other have to be coordinated.
  • the screen printing machine 10 shown in FIGS. 1-7 is provided with four printing stations I, II, III, IV, of which each a screen printing stencil 12a, 12b, 12c, 12d with each assigned doctor blade 14a, 14b, 14c, 14d.
  • the machine 10 is provided with a base carriage 16 which on Machine frame 19 attached guides 15 horizontally in Direction of arrows 17, 18 is reciprocable.
  • To the at both ends is the base slide with two vertical guides 23 provided.
  • Fig. 1 shows that the base slide in Area between the two vertical guides 23 for Weight saving has a lower height than in the two end regions provided with the guides 23.
  • a carriage 25 is vertically movable guided. Both carriages 25 carry the base carriage on their 15 facing away from an elongated support 27 on which all screen printing stencils 12a - 12d are attached.
  • the screen printing machine 10 is also in the area of the outer Printing stations I and IV are provided with vertical guides 21, which are attached directly to the machine frame 19. At every of these guides 21, a slide 20 is guided. At both An elongated support 29 is attached to the slide 20, on which all doctor blades 14a, 14b, 14c and 14d via cantilever arms 31 are attached.
  • the back and forth movements of the base carriage 16 in the direction the arrows 17, 18 are effected by an NC motor 38 which drives a toothed belt wheel 40, which with a toothed belt 42nd is engaged, which also via a second toothed belt wheel 49 is led.
  • the toothed belt 42 is connected to the base slide 16 connected so that the latter and with him the guides 23 and over the slide 25 and the carrier 27 with the base slide 16 connected screen printing stencils 14a-14d corresponding actuation of the NC motor 38 in the direction of Arrows 17, 18 can be moved back and forth.
  • the vertical Movements of the printing units are brought about by an NC motor 22, which drives a shaft 24 on which two Toothed belt wheels 26 are attached, each with a Timing belts 28 are engaged.
  • a further shaft 30 is mounted on the machine frame, to which two toothed belt wheels 32 are attached by each of which is used to guide one of the toothed belts 28.
  • the two toothed belts 28 are connected to one of the two slides 25 connected so that the carrier by actuating the NC motor 22 27 for the screen printing stencils 12a-12d and thus synchronously via the connection between rail 34 and roller pairs 36 also the carrier 29 with the doctor blades 14a-14d attached to it are moved, the carrier 29 on the carriage 20 on the laterally arranged guides 21 is guided.
  • UV lamps In the direction of transport 18 of the objects can be set up behind each printing station be attached, by means of which the just applied Ink can be dried.
  • these are UV lamps. These things are too familiar to any specialist, so that they are not explained in more detail will need. For reasons of clarity, these are UV lamps - or other drying devices - in the Drawing not shown.
  • Each object is transported through the press 10 carried by a bracket.
  • Brackets There are two in total Brackets available that can be transported independently and be rotated.
  • Printing machine 10 for printing bottle-shaped objects serves that are held at both ends, each exists Bracket from two bracket parts 43a, 43b and 44a, 44b, of which the holding part 43a or 44a in the usual way receives the bottom portion of the object 39, whereas that thorn-like mounting part 43b and 44b in the Neck of the bottle-shaped object engages.
  • the transport path for the brackets 43a, 43b and 44a, 44b and the objects carried by these are encircled by a Rail pair 46a, 46b defines on which the brackets are led.
  • the bracket parts 43a, 43b; 44a, 44b are of accordingly the function of the bracket parts interacting in pairs Transport carts 48a, 48b and 50a, 50b carried. That's how they are Bracket parts 43a, 43b attached to the carriages 48a and 48b, respectively.
  • the bracket parts 44a, 44b are from the carriages 50a and 50b carried.
  • Each of the carriages is arranged in pairs Rollers 52a, 52b provided, each in one of the height of the distance corresponding to the respective rail 46a or 46b are arranged and on the respective rail 46a. 46b adjacent to the guidance of the respective carriage on the rail to serve.
  • the two rails 46a and 46b are circumferential in the vertical plane arranged so that an upper, essentially horizontal conveyor track section 53a and one vertically below located, essentially parallel lower Transport path section 53b is present and both transport path sections 53a, 53b at their mutually facing ends through an approximately semicircular transport track section 53c and 53d are connected to each other.
  • In each of these two semicircular guideway sections 53c, 53d is an essentially horizontal coaxial one Shaft set 54, 55 arranged.
  • The is related 1, the left wave set 54 the Car pair 48a, 48b assigned, whereas the right wave set 55 is assigned to the pair of wagons 50a, 50b.
  • the shaft set 54 is for transporting the holder 43a, 43b provided with a shaft 57 on which a coaxial shaft 56 is rotatably mounted, with which the toothed belt wheel 58 is fixed connected is.
  • the toothed belt wheel 58 is over a toothed belt 60 driven by an NC motor 61.
  • On the shaft 56 are also two toothed belt wheels 62a, 62b firmly attached, each drive a toothed belt 64a, 64b.
  • Each of these timing belts 64a, 64b is in each case via a toothed belt wheel 66a, 66b, which is loosely arranged on the right shaft 55, such led that it runs parallel to the rails 46a, 46b.
  • the endless toothed belt running over the toothed belt wheels 62a, 66a 64a is connected to the carriage 48a, which the Holding part 43a carries.
  • the over the toothed belt wheels 62b and 66b running endless timing belt 64b is with the carriage 48b for the bracket member 43b connected.
  • About the actuation of the NC motor 61 can thus the transport of the bracket parts 43a, 43b object carried along by the rails 46a, 46b causes defined and controlled will.
  • a toothed belt wheel 70 with the shaft 57 on the object firmly connected which via a toothed belt 72 from an NC motor 74 can be driven.
  • a toothed belt 72 from an NC motor 74 there are two with the shaft 57 Toothed belt wheels 68a, 68b firmly connected.
  • Each of these two Toothed belt wheels each drive a toothed belt 71a, 71b, which is also loosely arranged on the right shaft 55 Toothed belt wheel 75a and 75b is guided.
  • the endless timing belt 71a is assigned to the carriage 48a and passed through it.
  • the carriage 48a has two guide rollers 83a, 83b, via which the toothed belt 71a with its smooth side runs.
  • a toothed belt wheel attached to the car 85, which is driven by the toothed belt 71a, is fixed with connected to a shaft 84 which carries the holding part 43a.
  • actuation of the NC motor 74 has a corresponding one Rotational movement of the holder part 43a and thus that of this carried object.
  • Such Rotational movement can also be done by simply moving the carriage 48a along its determined by the rail 46a Transport path can be effected with the toothed belt 71a stationary. With a carriage moving along the guideway thus the rotational movement of that carried by the support member 43a Object result from this transport movement and a possibly simultaneous movement of the Toothed belt wheel 71a.
  • Carriages 50a, 50b of the holder 44a, 44b are in a corresponding manner Way on the right in Fig. 1 of the drawing Shaft set 55 driven, which is also assigned to two NC motors are, of which the NC motor 86 for transporting the two carriages 50a, 50b along the through the two rails 46a, 46b serves defined guideway and the NC motor 87 the drive of the holder parts 44a, 44b for the purpose of rotating the caused by these worn object.
  • a coaxial shaft 78 is rotatably supported, with which several toothed belt wheels are firmly connected.
  • the toothed belt wheel 90 is driven by the NC motor 86 via a toothed belt 67 driven.
  • Each of these toothed belts 89a, 89b is over one Toothed belt wheel 91a, 91b, which is loose on the left shaft 57 is mounted such that it is parallel to the rails 46a, 46b runs.
  • Both timing belts 89a, 89b are each with one of the carriages 50a, 50b connected to this along the to transport the guideway defined by the rails 46a, 46b.
  • a toothed belt wheel 92 is fixedly connected to the shaft 77, which can be driven by the NC motor 87 via a toothed belt 73. Furthermore, two toothed belt wheels 94a, 94b are provided with the shaft 77 firmly connected. Each of these two toothed belt drives a toothed belt 95a, 95b, which also has a loose on the Left shaft 57 arranged toothed belt wheel 96a, 96b is.
  • the toothed belt 95a is assigned to the carriage 50a and in already in connection with the toothed belt 71a and the carriage 48a described way passed through the carriage 50a.
  • the toothed belt 95b is in a corresponding manner to the carriage 50b assigned. Both timing belts are used for printing or other treatments required rotational movement of the object carried by the holder 44a, 44b cause.
  • Both sets of shafts 54, 55 also carry an intermediate circuit suitable bearing stationary support 35. At the axial ends both carriers, the rotation of the shafts 58, 78 of the two Shaft sets 54, 55 do not participate, are holding means 63a, 63b attached, which the circumferential guide rails 46a, 46b carry.
  • the circumferential direction of the surface to be printed on the individual Sections of the surface have different curvatures and therefore have different central axes, can be a permanent Moving the object perpendicular to its longitudinal axis be required to meet the aforementioned conditions - tangential Course of the transfer area to the screen printing stencil or Position the squeegee substantially perpendicularly above the Central axis of the transfer area - to be met.
  • FIGS. 7a-7i show the process of printing an im Cross section of elliptical object over the entire circumference of 360 ° shown, the screen printing stencil 12a in the X direction slide back and forth and the squeegee 14a in the X direction is arranged stationary.
  • the contour of the object 39 is shown, which of the not bracket parts 43a, 43b shown, the via the toothed belt 64a, 64b by the program-controlled NC motor 61 have been transported into the position according to FIG. 7a, the positions of the interacting parts at the beginning of the Printing process shows.
  • the object 39 is over the Timing belt 71a, 71b by the program-controlled NC motor 74 pivoted in the direction of arrow 47 about its longitudinal axis 81, the screen printing stencil 12a by the program-controlled NC motor 38 shifted to the right in the direction of the X axis and simultaneously with the doctor blade 14a by the program-controlled NC motor 22 is raised in the direction of the Y axis so that the Fact to take into account that due to the elliptical Cross-sectional shape of the object 39 or the area to be printed same the transfer area on the lateral surface of the Object, each provided with ink by the squeegee becomes continuous in the course of the pivoting movement of the object moved up.
  • Figure 7b shows an intermediate stage in the course of the printing process, in which the two axes of the cross section run obliquely.
  • the object 39 that has experienced until then is the Central axis 81 around the distance l in the direction of the X axis against the squeegee 14a, which has been moved in the direction of the X axis is stationary.
  • the necessary shift of the Bracket 43a, 43b in the direction of the X axis is also caused by the corresponding program-controlled NC motor 61, which drives the timing belts 64a, 64b5.
  • the distance between central axis 81 and screen printing template in the intermediate position according to FIG. 7b is designated with "h".
  • Fig. 7c shows the relative positions of the interacting Share at a time when the longer axis of the Object cross-section runs vertically and the doctor blade 14a extending this axis perpendicular to the cross-sectional center located so that the longitudinal axis 81 of the object and Longitudinal axis of the transfer area collapse again. Consequently are in the course of the pivoting movement from the position shown in FIG. 7b into that of FIG. 7c the carriages 48a, 48b with those located thereon Brackets 43a, 43b again around the path l in the Starting position has been moved back according to FIG. 7a.
  • consisting of screen printing stencil 12a and squeegee 14a Printing unit has been further raised to the distance a to take into account the fact that the transfer area of the 7c position is higher than in the position shown in FIG Fig. 7b.
  • the areas to be printed on in both exemplary embodiments objects are not circular Have cross-section, they are regularly trained than the area to be printed is elliptical Cross section with two axes of symmetry.
  • the invention is by no means on printing objects with a limited such regular cross-sectional shape. It is possible to print even those objects, the ones to be printed Area has an irregular cross section, includes a flat surface, for example. Can also also such objects are printed, for example a have a substantially square cross-section, the Rounded edges and that between two adjacent edges areas are slightly curved outwards. It would be but also possible such objects with rounded edges then to print if the between two adjacent edges surface is completely flat, so it is not curved.
  • station VI in which the bottle to be printed is placed in the holder 43a, 43b or 44a, 44b is given, and station VII, in which the printed bottle from the respective holder is removed, the lower portion 53b of the transport path assigned.
  • the insertion of the bottle to be printed on the bracket located in the receiving station VI takes place via a gripper 79a, which can be moved three-dimensionally and the bottle transported by a conveyor 97a records and by overlapping swivel movements the bottle from vertical to horizontal position and at the same time brings it into the receiving station VI, in which one of the two parts of the respective located there Bracket is included.
  • the two are known mount the object-carrying bracket parts so that the distance between them can be changed so the two mounting parts hold the objects to be printed and can hold to release the printed object later to be able to.
  • the neck side End of the bottle-shaped object 39 cooperating Bracket part 43a, 43b parallel to the longitudinal axis of the of the Bracket parts worn object slidable in each associated carriage 48b, 50b arranged. That’s it Bracket part 43b, 44b provided with a cam roller 101, those in the receiving station VI and in the removal station VII cooperates with a curve section 103 which is parallel to Direction of transport of the object in the area of the aforementioned Stations runs.
  • the curve section 103 is by a pneumatic cylinder-piston arrangements 105 transversely to the direction of transport slidable.
  • the movement of the bracket parts in the direction of arrow 17 (Fig. 1) in the removal station VII runs on the mounting part 43b or 44b located cam roller 101 in the curve of the curve section 103 a.
  • the gripper 79b along the rail 99b in FIG Representation of Fig. 1 left end position and move into Removal station swiveled around the one still there the object to be carried on the mounting parts.
  • the bracket 44a, 44b can then in the receiving station VI are moved forward, the holding part 44b maintains its position in which it maintains its greater distance from the holding part 44a, so that after reaching the pick-up station VI the gripper 79a an object that he previously has decreased from conveyor 97a, in a horizontal position first brings between the two mounting parts 44a, 44b and then parallel by a corresponding movement to the longitudinal axis of the object, its bottom area into the holder 44a.
  • the object can be reached before the first Printing station I any additional treatments be subjected.
  • the object can be dusted, flamed and be aligned in the circumferential direction.
  • the object is then brought into the first printing station I, in of the parts immediately before printing begins assume positions described with Fig. 7a.
  • the printing process in the printing station I then takes place Transport to printing station II, in which the next one Print image is applied.
  • the object arrives after passing through of section 53c of the transport path again in the lower Section 53b and there into the removal station VII, in which through the object in the manner already described the gripper 79b is removed from the holder.
  • brackets 43a, 43b and 44a, 44b moved independently of one another along the transport path there is the possibility, for example after application of the last print image, the object immediately into the removal station VII to be transported and after removal of the printed Object from the holder immediately into the receiving station Move VI to pick up the next object there. There is still the possibility in the located between receiving station VI and printing station I. Treatment stations to perform all desired treatments, without this by transporting the other bracket (s) would be hindered or delayed. This is opposite known machines a significant increase in productivity achieved.
  • doctor blades 114a, 114b, 114c, 114d, 114e are essentially parallel to the main level of the respective associated Screen printing template and perpendicular to the longitudinal axis of the printing object arranged to slide back and forth to the relative movement required for the printing process between To effect screen printing stencil and associated squeegee.
  • each is made of a screen printing stencil and squeegee existing printing units vertically up and down arranged to be movable in the case of objects whose printing surface in cross section from the course of a circle or circular section that deviates in the course of the from the object executed pivoting movement changing altitude of each transfer area adjacent to the screen printing template to be able to follow.
  • An NC motor 122 is provided for this purpose, which drives a shaft 124 on which two toothed belt wheels 126 are attached, each with a vertical Timing belts 128 are engaged. Above the two Toothed belt wheels 126 are at a distance from these two Toothed belt wheels 132 are arranged, each for guidance one of the timing belts 128 is used.
  • Each of the two timing belts 128 is via a cross member 109 with a carriage 125 connected, which is guided on vertical guides 121, which on Machine frame 119 are attached. On this sled 125 all screen printing stencils 112a-112e are attached. Further is the carriage 125 with two at a distance from each other extending substantially horizontal guides 115 on which a carriage 116 is substantially horizontal which can be pushed back and forth, all the doctor blades 114a - carries 114e over cantilever arms 131. The floats of the Doctor slides 116 are caused by an NC motor 138, the one of two interacting telescopically Shaft sections 141, 145 existing shaft a toothed belt wheel 140 drives.
  • a toothed belt 142 is around this toothed belt wheel 140 and a second one at a horizontal distance Belt pulley 149 guided.
  • the two toothed belt wheels 140 and 149 are arranged on a carrier 151, the back is attached to the carriage 125. So the two take Toothed belt wheels 140, 149 and back and forth in the horizontal plane movable toothed belt 142 on the up and down movements part of the slide 125, with the telescopic interaction of the two shaft sections 141, 145 the changes the distance between the NC motor 138 and the toothed belt wheel 140 are made possible.
  • the timing belt 142 and that on the guides 115 guided slides 116 are by at least one Traverse 159 connected together so that the horizontal Level slides of the carriage 116 with the doctor blades located thereon caused by the toothed belt 142 will.
  • FIGS. 8 and 9 is correct for the drives with that in accordance with FIGS. 1 and 2 in principle.
  • Fig. 10 which the arrangement of the Shaft sets and the individual toothed belt wheels they carry with the timing belt.
  • Fig. 10 are all parts, the parts of the embodiment according to the 1 - 4 correspond, with the same, but around each 100 higher reference numerals.
  • the arrangement according to FIG. 10 allows a somewhat more compact construction than the arrangement 4.
  • 11a-11i is analogous to the representation in the figures 7a - 7i the sequence of movements during the printing process interacting parts shown when the screen printing stencil stationary parallel to the X-axis and the doctor blade parallel is arranged to be displaceable to the X axis. It is necessary that the object 139 in during the printing process Direction of the X-axis is moved to the one to be printed Unroll surface areas of the same on the screen printing template. This movement is about the object supporting Bracket parts 143a, 143b by the NC motor 161, which the drives two timing belts 164a, 164b, with which the two Carriages 148a, 148b are connected for the mounting parts transfer the object.
  • the to printing surface has a cross section that of the Circular shape deviates, there is also a need here additionally to move the object in the direction of the Y axis, to ensure that the transfer area of the object in the runs essentially tangential to the screen printing stencil and the squeegee is substantially perpendicular to the central axis of the Transfer area stands. If the doctor blade in the course of the printing process at a constant speed relative to the direction the X-axis fixed screen printing template, for example from the position according to FIG. 11a into the position according to Figure 11b is moved, it is necessary to move simultaneously transport movement of the object in the same direction to overlay a second movement.
  • Figures 11f - 11i show the sequence of movements during Printing on the other side of the object 39. Here there is with regard to the course of the movements agreement with the process described in connection with FIGS. 11a-11e.
  • bracket parts 144a and 144b For the bracket parts 144a and 144b and the one they support The same applies accordingly.
  • the two stations in which the objects to be printed in the Brackets are inserted or the printed objects out these brackets are taken out, the upper section 53a assigned to the transport track, whereas in the case of the Embodiment according to FIGS. 1 and 2, as already explained, these stations are assigned to the lower section 53b are.
  • Which of the two options is preferred depends on the respective circumstances, e.g. of whether in the area of the transport track 53c or 153c any further Pretreatments should be done before the first Printing process takes place. Otherwise, the device 8 and 9 of the first printing station I one more in the area of the upper transport track section 153a Upstream station, in which the objects in the circumferential direction be aligned.
  • the application of the individual print images so that a printing process only in one of the total existing printing stations is carried out, whereas the other stations run along empty.
  • Dependent on from the cross-sectional shape of the area to be printed on Object can exist in the presence of, for example, two Brackets in two stations simultaneously printing processes be performed when the vertical movements of the Printing units in both stations match.
  • At least one of the printing stations in another way, e.g. such that the Screen printing template is fixed and the squeegee transversely to the transport direction 18 for applying the printing ink to the object is moved relative to the screen printing stencil.
  • Such Arrangement is e.g. then useful if the object is in has essential flat surface section to be printed is. In this case, screen printing stencil and need Object does not move relative to each other during printing will.

Claims (14)

  1. Machine pour réaliser des impressions sur un objet (39), comportant pour maintenir celui-ci au moins un porte-objet (43a,43b; 44a,44b) monté rotativement, et au moins un système d'impression constitué par un pochoir de sérigraphie (12a-12d) en regard duquel peut coulisser une raclette (14a-14d), plus un convoyeur (64a,64b; 89a,89b) pour faire avancer l'objet (39), entre un poste de chargement où l'objet est mis en place sur le porte-objet, et un poste d'enlèvement où l'objet est séparé de son porte-objet, caractérisée en ce qu'elle comporte au moins deux porte-objets (43a,43b; 44a,44b) dépendant chacun d'un convoyeur séparé (64a,64b; 89a,89b) ayant son propre organe d'entraínement (61; 86), outre un organe d'entraínement séparé (74; 87) pour le mécanisme de transmission (71a,71b; 95a,95b) qui commande le pivotement de chaque porte-objet, et en ce que les organes moteurs (61; 86; 74; 87) qui commandent les convoyeurs (64a,64b; 89a,89b), et les mécanismes de transmission (71a,71b; 95a, 95b), ainsi que les organes moteurs (38) qui assurent le mouvement relatif entre chaque pochoir de sérigraphie et sa raclette, sont constitués par des moteurs à commande numérique (NC).
  2. Machine selon la revendication 1, caractérisée en ce que, pour réaliser une impression sur un objet (39) dont la surface à imprimer présente un profil différent d'un cercle ou d'un secteur circulaire, elle comporte des moyens pour commander une translation latérale du porte-objet (43a,43b; 44a,44b) garni de l'objet considéré, sous l'action du convoyeur (64a,64b; 89a,89b) de ce porte-objet, afin de maintenir l'objet à traiter (39), suivant le profil en section transversale de la zone concernée à la surface de cet objet, dans une position relative correcte par rapport à la raclette (14a-14d), telle que la raclette reste sensiblement à l'aplomb de l'axe médian de la zone de transfert de la surface de l'objet pour en assurer constamment l'encrage.
  3. Machine selon la revendication 1, caractérisée en ce que chaque pochoir de sérigraphie (12a-12d) conserve une position fixe dans le sens latéral, pendant l'opération d'impression, la raclette (14a-14d) se déplaçant alors dans le sens latéral par rapport au pochoir (12a-12d) pour assurer l'application du motif imprimé sur l'objet (39), et en ce que le convoyeur (64a,64b; 89a,89b) imprime à l'objet (39) le déplacement voulu pour assurer le mouvement de roulement de l'objet contre le pochoir de sérigraphie, afin d'appliquer le motif imprimé sur l'objet.
  4. Machine selon la revendication 1, caractérisée en ce que chaque raclette (14a-14d) reste immobile dans le sens latéral pendant l'opération d'impression, et en ce que chaque pochoir de sérigraphie (12a-12d) se déplace dans le sens latéral par rapport à sa raclette, pour assurer l'application du motif imprimé sur l'objet.
  5. Machine selon la revendication 1, caractérisée en ce que, dans chaque système d'impression, le pochoir de sérigraphie (12a-12d) et sa raclette (14a-14d) sont montés ensemble à coulisse pour effectuer des mouvements de va-et-vient dans le sens vertical, ces mouvements de va-et-vient étant commandés par un moteur (22) à programme numérique (NC), afin de compenser les décalages de position verticale de la zone de transfert de l'objet (39) pendant l'opération d'impression, lorsque l'objet ne présente pas un profil transversal circulaire.
  6. Machine selon la revendication 1, caractérisée en ce que chaque convoyeur (64a,64b; 89a,89b) comporte au moins une courroie crantée, qui est reliée au porte-objet correspondant (43a,43b; 44a,44b).
  7. Machine selon la revendication 1, caractérisée en ce que le mécanisme de transmission (71a,71b; 95a,95b) comporte au moins une courroie crantée qui coopère avec une denture (85) du porte-objet correspondant (43a,43b; 44a,44b).
  8. Machine selon la revendication 1, caractérisée en ce qu'elle comporte deux systèmes d'arbres (54,55) ayant chacun deux arbres coaxiaux (56,57; 77,78) et dont les axes sont écartés d'une certaine distance, l'ensemble de ces arbres portant des poulies (62a,62b; 68a,68b; 91a,91b; 96a,96b; 66a,66b; 75a,75b; 88a,88b; 94a,94b) pour entraíner et guider les convoyeurs (64a,64b; 89a,89b) ainsi que les mécanismes de transmission (71a,71b; 95a,95b).
  9. Machine selon les revendications 6 et 7, caractérisée en ce qu'elle comporte pour chaque objet (39) au moins un porte-objet en deux parties (43a,43b; 44a,44b), chaque partie d'un même porte-objet dépendant d'un convoyeur séparé (64a,64b; 89a,89b) et d'un mécanisme de transmission séparé (71a,71b; 95a,95b), et en ce que les deux convoyeurs et les deux mécanismes de transmission de chaque système dépendent respectivement du même moteur à commande numérique (NC) (61; 74; 86; 87).
  10. Machine selon la revendication 1, caractérisée en ce qu'elle comporte un support commun (27) pour tous les pochoirs de sérigraphie (12a-12d).
  11. Machine selon la revendication 1, caractérisée en ce qu'elle comporte un support commun (25) pour toutes les raclettes (14a-14d).
  12. Machine selon la revendication 1, caractérisée en ce que le support (27) des pochoirs (12a-12d) et le support (25) des raclettes (14a-14d) sont reliés l'un à l'autre, de manière à permettre aux deux supports d'effectuer des mouvements de va-et-vient l'un par rapport à l'autre, dans le sens horizontal prévu pour l'opération d'impression et dans le sens opposé, en étant solidaires par construction dans le sens vertical.
  13. Procédé d'impression par sérigraphie, pour appliquer des motifs décoratifs sur des objets (39) traités séparément, chaque objet étant pendant l'opération d'impression maintenu par un porte-objet (43a,43b; 44a,44b), animé d'un mouvement discontinu pour défiler dans les postes de traitement d'une machine, chaque porte-objet étant pourvu de moyens (71a,71b; 95a,95b) pour faire pivoter le porte-objet et l'objet (39) maintenu par celui-ci, caractérisé en ce que le mouvement d'avance de chaque porte-objet est indépendant du mouvement d'avance de chacun des autres porte-objets, en ce que le mouvement de pivotement de chaque porte-objet est indépendant du pivotement de chacun des autres porte-objets au moins pendant l'opération d'impression, et en ce que pendant l'opération d'impression d'objets constitués par exemple par des bouteilles de profil non circulaire, chaque objet à traiter subit, dans le sens de son mouvement d'avance (117; 118) et/ou en sens opposé, un mouvement de décalage assuré par le convoyeur (64a,64b; 89a,89b) en fonction du profil transversal de la zone à traiter à la surface de l'objet, pour maintenir l'objet par rapport à la raclette (14a-14d) dans une position correcte, telle que la raclette reste sensiblement à l'aplomb de l'axe moyen de la surface de transfert de l'objet, pour en assurer constamment l'encrage.
  14. Procédé selon la revendication 13, caractérisé en ce que chaque système d'impression constitué par un pochoir de sérigraphie (12a-12d) avec sa raclette (14a-14d) subit un mouvement vertical de soulèvement et/ou d'abaissement, pour compenser les variations de position verticale de la surface de transfert de l'objet à traiter, lorsqu'il s'agit d'appliquer une impression sur un objet dont le profil n'est pas circulaire en coupe transversale.
EP95115595A 1994-10-11 1995-10-04 Procédé de sérigraphie et dispositif pour la mise en oeuvre dudit procédé Expired - Lifetime EP0707959B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436275 1994-10-11
DE4436275A DE4436275C2 (de) 1994-10-11 1994-10-11 Verfahren und Vorrichtung zum Bedrucken von Einzelobjekten

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EP0707959A1 EP0707959A1 (fr) 1996-04-24
EP0707959B1 true EP0707959B1 (fr) 1998-04-29

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EP95115595A Expired - Lifetime EP0707959B1 (fr) 1994-10-11 1995-10-04 Procédé de sérigraphie et dispositif pour la mise en oeuvre dudit procédé

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US (1) US5651308A (fr)
EP (1) EP0707959B1 (fr)
JP (1) JPH08207238A (fr)
DE (2) DE4436275C2 (fr)

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US7737349B1 (en) * 2006-08-14 2010-06-15 Art Guitar, Llc Decorating guitars
US7470455B2 (en) * 2003-11-18 2008-12-30 Art Guitar, Llc Decorating guitars
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US8522515B2 (en) * 2009-01-26 2013-09-03 R.J. Reynolds Tobacco Company Method and apparatus for customizing cigarette packages
DE102010020958B4 (de) 2010-05-19 2012-05-03 Khs Gmbh Vorrichtung sowie Verfahren zum Bedrucken, insbesondere zum mehrfarbigen Bedrucken von Behältern
CN102126335B (zh) * 2011-01-27 2012-07-04 玉环县东美塑机有限公司 自动圆面丝印机中的丝印装置
FR3001648B1 (fr) * 2013-02-04 2015-07-17 Illinois Tool Works Machine et procede de marquage d'articles
CN104325778B (zh) * 2014-09-24 2016-10-05 深圳市华星光电技术有限公司 网版印刷机及其印刷方法
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Also Published As

Publication number Publication date
DE4436275A1 (de) 1996-04-25
US5651308A (en) 1997-07-29
DE59502043D1 (de) 1998-06-04
EP0707959A1 (fr) 1996-04-24
JPH08207238A (ja) 1996-08-13
DE4436275C2 (de) 1998-08-27

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