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EP0265982B1 - Maschine für den Mehrfarbensiebdruck von zylindrischen Behältern im allgemeinen - Google Patents

Maschine für den Mehrfarbensiebdruck von zylindrischen Behältern im allgemeinen Download PDF

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Publication number
EP0265982B1
EP0265982B1 EP87201888A EP87201888A EP0265982B1 EP 0265982 B1 EP0265982 B1 EP 0265982B1 EP 87201888 A EP87201888 A EP 87201888A EP 87201888 A EP87201888 A EP 87201888A EP 0265982 B1 EP0265982 B1 EP 0265982B1
Authority
EP
European Patent Office
Prior art keywords
mandrels
gear
containers
machine
shaft
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
EP87201888A
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English (en)
French (fr)
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EP0265982A3 (en
EP0265982A2 (de
Inventor
Giorgio Aiassa
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.)
CERVE SpA
Original Assignee
CERVE SpA
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Filing date
Publication date
Application filed by CERVE SpA filed Critical CERVE SpA
Priority to AT87201888T priority Critical patent/ATE73391T1/de
Publication of EP0265982A2 publication Critical patent/EP0265982A2/de
Publication of EP0265982A3 publication Critical patent/EP0265982A3/en
Application granted granted Critical
Publication of EP0265982B1 publication Critical patent/EP0265982B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/08Machines
    • B41F15/0872Machines for printing on articles having essentially cylindrical surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/08Machines
    • B41F15/10Machines for multicolour printing

Definitions

  • the present invention relates to a high productivity printing machine able to carry out multi-colour silk-screen printing on cylindrical containers in general.
  • US-A-3096709 discloses a decorating machine in which a number of spindles are supported and angularly spaced on a rotatable turret, each of said spindles carrying container-supporting chucks.
  • the turret is rotated intermittently by suitable means to bring the containers carried by the spindles successively to peripheral decorating stations, in each of which a decorating screen is provided.
  • the screen is supported by a support for pivotal movement and for radial movement relative to the turret, in order to consent the container to roll across the screen.
  • Each spindle comprises a gear engaging a rack bar fixed relatively to the rotation of said turret.
  • Said rack bars being located at each of said decorating stations, in order to engage the gears of successive spindles at diametrically opposed points.
  • the position of the spindles carrying the successive containers is registered by means consisting of a stop cooperating with each spindle for limiting rotation to a registering position, and of a clutch incorporated in each spindle driven by a gear oscillated in timed relationship to movement of said turret.
  • the main object of the present patent is to provide a high productivity printing machine able to carry out multi-colour silk-screen printing which is unblurred and in which the various colour applications are perfectly centered relative to each other. This is attained by means of a rational and reliable design.
  • the idea on which the invention is based consists of kinematically linking the screens and the support means for the containers to be printed by a commmon gear with double toothing which is mounted idly on the vertical shaft supporting the radial support means the said gear being arranged to undergo reciprocating rotation of any angular amplitude, the forward stroke of which is effected while the mandrels are stationary so as to cause the containers to rotate with a peripheral speed equal to and concordant with the linear speed at which the screens slide, and the return stroke of which is effected while the mandrels are undergoing transfer from one station to another so that these latter again become arranged in their starting position.
  • the structure proposed by the invention comprises a container loading station, at least two printing stations and a discharge station all distributed equidistantly along a horizontal circular path, and a like number of identically distributed horizontal mandrels which support the containers and are caused to follow said circular path by undergoing stepwise motion with an angular amplitude equal to that of their distribution.
  • the screens can slide tangentially to said circular path, and on the central shaft of the machine there is idly mounted a gear with which corresponding gears associated with said screens and mandrels are constantly engaged.
  • Said gear according to the invention is rotated with reciprocating motion in steps of any angular amplitude, so that during its return motion, which is completed during the transfer of the mandrels between one station and the next, it causes the mandrels to rotate so as to reposition them in their starting position, whereas during its forward motion it causes rotation of the mandrels while they remain stationary, together with simultaneous concordant sliding of the screens which rest against the containers.
  • the speed at which the screens slide is equal to the peripheral speed of the containers, thus enabling silk-screen printing to be obtained which is unblurred and in which the different colour applications are perfectly positioned relative to each other, the machine being able to operate at a production rate which is considerably higher than that of known multi-colour silk-screen printing machines.
  • Figure 1 is a partial sectional elevation of the invention.
  • Figure 2 is a partial plan view of Figure 1, with parts cut away in order to better show parts which would otherwise be hidden.
  • Figure 3 is a longitudinal section through one of the machine mandrels to an enlarged scale,
  • any number of printing stations can be provided, as the characteristic elements of the invention illustrated in the figures are suitable for machines comprising any number of printing stations exceeding two, in addition to a container loading station and a container discharge station. Said stations must be equidistant for the reasons stated hereinafter.
  • FIG. 1 shows a hollow vertical shaft 1 which is idly mounted on a fixed platform 2 under which the drive (not shown) for said hollow shaft 1 is located.
  • Said drive consists of an intermittent motion unit suitable for causing the hollow shaft 1 to undergo successive rotations of 60° each.
  • the invention comprises four equidistant printing stations indicated overall by 3, a loading station for the containers 4 and a container discharge station, these being indicated diagrammatically only by means of their axes 5 and 6 respectively, as the means proposed for loading/discharging the containers do not form a characterising part of the invention.
  • said loading/discharge means can consist of two gripper members caused to oscillate in the two vertical planes on the lines 5 and 6, either by autonomous control means or by means linked to said drive for the hollow shaft 1.
  • a double ring bevel gear 8 having its lower toothing engaging with four bevel gears 9 pertaining to the four printing stations 3.
  • the bevel gears 9 are fixed onto corresponding shafts 10 positioned radially to the hollow shaft 1 and mounted on convenient supports 11 (see Figure 1).
  • the four bevel gears 9 have a pitch circle diameter which is equal to 1/6 of the pitch circle diameter of the double ring bevel gear 8.
  • an interchangeable spur gear 12 which has a pitch circle diameter equal to the outer diameter of the containers 4 to be printed and engages with a height-adjustable rack 13.
  • This latter is rigid with a horizontal slide 14 positioned orthogonally to the shaft 10 and slidingly mounted on two overlying cylindrical bars 15 which are supported by a bracket 16 fixed to the platform 2.
  • a screen support frame 18 is pivoted to each slide 14 and extends towards the centre of the machine to surmount the circular path followed by the containers 4.
  • said frame 18 is supported by an idle wheel 19 which is mounted on a slidable vertical rod 20, this latter being driven with vertical rectilinear to-and-fro translational motion in perfect synchronism with the transfer and printing stages of the containers 4.
  • Said to-and-fro motion is controlled by a rack and pinion 21, the latter element of which is fixed onto a horizontal shaft 22 idly mounted on a profiled support structure 23. At its other end, said shaft 22 idly carries a second pinion 24 which is in constant engagement with a corresponding rack.
  • This latter is formed on a profiled member 25 which is fixed to the top of a hollow cylindrical bar 26 slidingly contained within the hollow shaft 1.
  • the hollow bar 26 contains a slidable rod 27, and said bar 26 and rod 27 are driven with vertical to-and-fro motion by respective linkages connected to the main machine drive. No description is given of said linkages as these are of known type.
  • each linkage 29 which are not described as they are of usual type in the silk-screen printing field, are connected to the upper end of the rod 27 by way of a connecting member 28.
  • each linkage supports at its free end a knife 30 which surmounts the corresponding screen 31.
  • a disc structure 32 fixed on the hollow shaft 1 and having a descending skirt 33.
  • the skirt 33 supports six angularly equidistant radial mandrels, each comprising a sleeve 34 in which a shaft 35 is rotatably mounted.
  • a plug 36 on which the containers 4 are to be tightly fitted, whereas the inner end of said shaft 35 carries a bevel gear 37.
  • This latter has the same pitch circle diameter as the bevel gear 9.
  • the bevel gear 37 is constantly engaged with the upper toothing of the double ring bevel gear 8, and between said shaft 35 and bevel gear 37 there is interposed a front-acting clutch device clearly shown in Figure 3. From this latter figure it can be seen that the bevel gear 37 is mounted idly on the shaft 35, and has fixed to its rear a sleeve 70, the opposite end of which is closed by a ring gear 71. Through this latter there emerges the hemispherical head of a push rod 72 which rests by way of a disc 722 against a bush 74, this latter embracing a sleeve 73 fixed to the shaft 35.
  • the sleeve 73 comprises external cylindrical toothing with which conjugate toothing provided on the inside of the bush 74 engages in an axially slidable manner.
  • a helical compression spring 75 arranged to maintain two conjugate frontal toothings 721 provided on the facing surfaces of said bush 74 and ring gear 71 in mutual engagement.
  • Said front-acting clutch disengages immediately before the printed containers are discharged, and engages immediately after the containers to be printed are loaded, so as to torsionally disengage/engage said shaft 35 and bevel gear 37 respectively, so as to prevent undesirable rotation of the containers during the loading/discharge stages.
  • Said engagement/disengagement is effected by a rocker lever 38 pivoted to the disc structure 32 and controlled by an annular cam 39 fixed to the structure 23 (see Figure 1).
  • a tube 40 opens into the bush 34, and thus also into the shaft 35 which is provided at its front with a convenient duct 76 (see Figure 3), said tube communicating at its other end with an annular header 41 fixed to the structure 23.
  • the header 41 comprises a cavity shaped as an open ring in which a vacuum is maintained in order to retain the containers 4 against the plugs 36, and also comprises a small recess which is provided in correspondence with the discharge station 6 and is connected to a compressed air source.
  • each printing station 3 there is associated as rear support 42 arranged to cooperate with the plugs 36 in order to support the containers 4 during printing.
  • the rear support 42 is held on a slide 43 which is slidingly mounted on two bars 44 fixed to the platform 2 and positioned to the sides of the shaft 10.
  • the slide 43 is connected by a connecting rod 45 to a rocker arm 46 which is controlled by a cam 47, the motion of which derives from the main machine drive.
  • a connecting rod 50 is hinged to said crank 49 as shown in Figure 2, and is further hinged to a rocker lever 51, which is connected to the ring gear 8 by a further connecting rod 52.
  • the invention operates as follows. Each time a mandrel faces the loading station 5, where is stops, the loading device positions a container 4 in front of the plug 36, with its mouth resting against this latter. The vacuum induced in the container 4 through 35 draws the container towards the plug 36, which thus supports it.
  • the hollow shaft 1 undergoes a 60° rotation (in the anticlockwise direction with respect to Figure 2), and at the same time the ring gear 8 undergoes the same rotation under the control of the lever system 50, 51, 52.
  • the elements 1 and 8 rotate rigid with each other so that the gearwheel 9 is rotated in such a manner as to cause the slide 14 to slide upstream with reference to the direction of rotation of the hollow shaft 1.
  • the screens 31 are moved upwards, and the corresponding knives 30 are spaced apart from these latter.
  • the rear support 42 closes against the end of the container 4, after which the screen 31 is rested against this latter, the knife 30 is lowered, and the ring gear 8 then undergoes rotation through the same angle as the preceding but in the opposite direction, whereas the hollow shaft 1 remains temporarily stationary.
  • the screen 31 thus moves with a linear speed which is identical to the speed of rotation of the outer surface of the container 4, which undergoes a complete revolution.
  • the printed region of the container 4 becomes repositioned in its exact original position, which is perfectly centered with respect to the next printing station 3.
  • the aforesaid operations are repeated identically from this moment onwards, with a printed container being discharged at 6 and a container to be printed being loaded at 5 each time the hollow shaft stops.
  • the machine can obviously be constructed with any number of printing stations, of which only that number corresponding to the number of colours to be printed are activated.
  • the invention also teaches how containers provided with a handle, such as jugs, can undergo multi-colour silk-screen printing.
  • a free-wheel device is interposed upstream of the plug 36, and on its fixed part there is fitted a stop which projects beyond the corresponding plug 36.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Printing Methods (AREA)

Claims (8)

  1. Maschine für den Mehrfarben-Siebdruck von zylindrischen Behältern im allgemeinen, bestehend aus:
    - einer waagrechten Plattform (2), auf der eine Ladestation (5), mindestens zwei Druckstationen (3) und eine Entladestation (6) für die Behälter (4) angeordnet sind und zwar im gleichen Winkelabstand voneinander entlang einer Kreisbahn, tangential zu dieser die Siebe (31) der Druckstationen gleiten können,
    - aus einer Anzahl von auf dem Kreisumfang radial angeordneten Haltedorne (34 36), die von einer zentralen, senkrechten Welle (1) getragen und schrittweise weitergedreht werden,
    - einem Zahnrad (8), das auf dieser Welle (1) gelagert ist und in welches korrespondierende, den Haltedornen zugeordnete Zahnräder (37) eingreifen,
    dadurch gekennzeichnet, daß das Zahnrad (8) freilaufend auf der senkrechten Welle (1) gelagert ist, angeordnet, um eine Vorund Rückbewegung zu machen, wobei der Volauf bei Stillstand der Haltedorne ausgeführt wird und der Rücklauf, während sich die Haltedorne von einer zur nächsten Station bewegen, und eine doppelte Zahnung aufweist, in welche korrespondierende Zahnräder (37), (9), die den Haltedornen (34) (36) und Druckstationen (3) zugeordnet sind, eingreifen, so daß alle Siebe und alle Halteeinrichtungen für die Behälter kinematisch verbunden sind, um ihre relative Position während dem ganzen Umlauf der Welle (1) zu halten.
  2. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Druckstationen (3) jeweils ein Sieb (31) mit seinem dazugehörigen darüberliegenden Messer (30) aufweisen und welches oberhalb der Bahn angeordnet ist, auf der sich die Behälter bewegen und welches seitlich schwenkbar zu einem Gleitstück (14) ist, das mit einer höhenverstellbaren Zahnstange (13) versehen ist, in die ein austauschbares Antriebszahnrad (12) eingreift, das einen Teilkreisdurchmesser hat, der gleich dem Außendurchmesser der Behälter (4) ist.
  3. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß jeder Haltedorn eine Hülse (34) aufweist, in der eine in ihrem vorderen Bereich hohle Welle (35) drehbar montiert ist und an deren vorderem Ende ein Stopfen (36) befestigt ist, auf dem die Öffnung des Behälters (4) aufliegt, wohingegen an ihrem hinteren Ende ein Kegelzahnrad (37) befestigt ist, das in das Zahnrad (8) eingreift, wobei die Fronthöhlung (76) der Welle (35) mit einem festen Verteilerkopf (41) Luftverbindung hat zur Evakuierung des Behälters und für die anschließende Belüftung desselben.
  4. Maschine nach Anspruch 3,
    dadurch gekennzeichnet, daß das Kegelzahnrad (37) und die Welle (35) mittels einer stirnseitig wirkenden Kupplung (721) drehgekuppelt sind, die am hinteren Ende der letzteren angeordnet ist und die durch einen dem entsprechenden Haltedorn zugeordneten einarmigen Kniehebel (38) ausgeklinkt und von einer feststehenden Nocke (39) gesteuert ist.
  5. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die senkrechte Haltedorn-Trägerwelle aus einer Hohlwelle (1) besteht, in der ein verschiebbarer Hohlstab (26) und eine verschiebbare Stange (27) ko-axial eingefügt sind, wobei diese letzteren dazu vorgesehen sind, die Siebe (31) und Messer (30) der Druckstationen jeweils anzuheben oder zu senken, wobei die Hohlwelle (1) von einer intermittierenden Bewegungseinheit gesteuert ist.
  6. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß das Doppelzahnrad aus einem Doppelring-Kegelzahnrad (8) besteht, das von einem Hebelsystem (51, 52) gesteuert wird, welches ein Kurbelgetriebe (50, 49) mit einem Kurbelzapfen (49) enthält, dessen Exzentrizität einstellbar ist und mit dem Antrieb der Hohlwelle (1) verbunden ist, um zu bewirken, daß das Zahnrad (8) in beide Richtungen dreht und zwar mit einer Geschwindigkeit, daß der Rücklauf während der Weiterbewegung der Haltedorne von einer Station zur nächsten vollendet ist.
  7. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß jedes der den Druckstationen (3) zugeordnete Zahnrad aus einem Kegelzahnrad (9) besteht, dessen Teilkreisdurchmesser gleich dem der den Haltedornen (34, 36) zugeordneten Kegelzahnräder (37) ist, wobei das Kegelzahnrad (9) am Ende einer radialen Welle (10) befestigt ist, die auf der Plattform (2) gelagert ist, und an deren anderem Ende das Antriebszahnrad (12) befestigt ist, das den Siebhalterungsschieber (14) steuert.
  8. Maschine nach Anspruch 1,
    dadurch gekennzeichnet, daß die Kegelzahnräder (37), (9), die den Haltedornen (34, 36) und den Druckstationen (3) zugeordnet sind jeweils einen Teilkreisdurchmesser gleich 1/N des Teilkreisdurchmessers des Doppelring-Kegelzahnrades (8) haben, wobei N die Gesamtzahl der entlang der Kreisbahn angeordneten Stationen ist.
EP87201888A 1986-10-31 1987-10-03 Maschine für den Mehrfarbensiebdruck von zylindrischen Behältern im allgemeinen Expired - Lifetime EP0265982B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201888T ATE73391T1 (de) 1986-10-31 1987-10-03 Maschine fuer den mehrfarbensiebdruck von zylindrischen behaeltern im allgemeinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4685386 1986-10-31
IT8646853A IT1216379B (it) 1986-10-31 1986-10-31 Macchina per la stampa serigrafica a piu' colori di contenitori cilindrici in genere

Publications (3)

Publication Number Publication Date
EP0265982A2 EP0265982A2 (de) 1988-05-04
EP0265982A3 EP0265982A3 (en) 1989-04-19
EP0265982B1 true EP0265982B1 (de) 1992-03-11

Family

ID=11259729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201888A Expired - Lifetime EP0265982B1 (de) 1986-10-31 1987-10-03 Maschine für den Mehrfarbensiebdruck von zylindrischen Behältern im allgemeinen

Country Status (6)

Country Link
EP (1) EP0265982B1 (de)
AT (1) ATE73391T1 (de)
DE (1) DE3777328D1 (de)
ES (1) ES2031122T3 (de)
GR (1) GR3004485T3 (de)
IT (1) IT1216379B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10010591A1 (de) * 2000-03-03 2001-09-27 Isimat Gmbh Siebdruckmaschinen Rundschalttischmaschine
DE102015219975A1 (de) 2015-10-14 2017-04-20 Krones Ag Verfahren zum individuellen Bedrucken von Behältern
DE102015219973A1 (de) 2015-10-14 2017-05-04 Krones Ag Verfahren zum individuellen Bedrucken von Behältern

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT217493Z2 (it) * 1989-06-29 1991-12-13 Tecno 5 Societa A Resposabilit Gruppo contropunta per macchine perla stampa serigrafica policroma di contenitori cilindrici in genere
FR2679170B1 (fr) * 1991-07-15 1996-11-29 Dubuit Mach Tete d'impression pour machine a imprimer comportant un barillet rotatif pour l'impression d'objets.
IT1304271B1 (it) * 1998-03-17 2001-03-13 Tecno 5 S R L Gruppo serigrafico polifunzionale per macchine a giostra per la stampa serigrafica a piu' colori di contenitori con superfici curve.
IT1313835B1 (it) * 1999-11-02 2002-09-23 Aisa Spa Macchina serigrafica rotante per la stampa di oggetti cilindrici consupporti dei telai di stampa a movimento rettilineo verso/da l'oggetto

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484671A (en) * 1944-05-02 1949-10-11 Owens Illinois Glass Co Silk screen stencil decorating machine
US3096709A (en) * 1961-08-04 1963-07-09 Eldred Company Decorating machine
US3232225A (en) * 1962-08-24 1966-02-01 Monsanto Co Mechanism for handling and stenciling indicia on articles
DE2718635A1 (de) * 1977-04-27 1978-11-02 Neckarprint Gmbh Siebdruckmasc Mehrfarb-siebdruckmaschine mit trockenstation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10010591A1 (de) * 2000-03-03 2001-09-27 Isimat Gmbh Siebdruckmaschinen Rundschalttischmaschine
DE10010591C2 (de) * 2000-03-03 2003-10-30 Isimat Gmbh Siebdruckmaschinen Rundschalttischmaschine
DE102015219975A1 (de) 2015-10-14 2017-04-20 Krones Ag Verfahren zum individuellen Bedrucken von Behältern
DE102015219973A1 (de) 2015-10-14 2017-05-04 Krones Ag Verfahren zum individuellen Bedrucken von Behältern

Also Published As

Publication number Publication date
IT8646853A0 (it) 1986-10-31
EP0265982A3 (en) 1989-04-19
IT1216379B (it) 1990-02-22
GR3004485T3 (de) 1993-03-31
EP0265982A2 (de) 1988-05-04
ATE73391T1 (de) 1992-03-15
DE3777328D1 (de) 1992-04-16
ES2031122T3 (es) 1992-12-01

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