EP0050269B1 - Procédé et dispositif pour vernir des corps cylindriques creux tels que corps de boîte tout autour de leur pourtour - Google Patents

Procédé et dispositif pour vernir des corps cylindriques creux tels que corps de boîte tout autour de leur pourtour Download PDF

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Publication number
EP0050269B1
EP0050269B1 EP81108013A EP81108013A EP0050269B1 EP 0050269 B1 EP0050269 B1 EP 0050269B1 EP 81108013 A EP81108013 A EP 81108013A EP 81108013 A EP81108013 A EP 81108013A EP 0050269 B1 EP0050269 B1 EP 0050269B1
Authority
EP
European Patent Office
Prior art keywords
driven
mandrels
coating roller
roller
hollow body
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
Application number
EP81108013A
Other languages
German (de)
English (en)
Other versions
EP0050269A1 (fr
Inventor
Hans-Juergen Schlinsog
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Publication of EP0050269A1 publication Critical patent/EP0050269A1/fr
Application granted granted Critical
Publication of EP0050269B1 publication Critical patent/EP0050269B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
    • B05C1/022—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles to the outer surface of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
    • B05C13/025—Means for manipulating or holding work, e.g. for separate articles for particular articles relatively small cylindrical objects, e.g. cans, bottles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2254/00—Tubes
    • B05D2254/02—Applying the material on the exterior of the tube

Definitions

  • the invention relates to a method and a device for the all-round painting of cylindrical hollow bodies, such as can hulls, in which the hollow bodies are held on thorns of a driven thorn wheel that can be driven about their longitudinal axis, pressed against a driven painting roller of a coating unit running axially parallel to the thorn wheel, and in the area of contact with the painting roller with the thorns are guided along the contour of the roller.
  • the all-round painting of cylindrical hollow bodies takes place according to the aforementioned known method in such a way that the hollow bodies held on the drivable mandrels of a rotatingly driven thorn wheel are set in a rotational movement with the thorns, so that the peripheral speed of the hollow bodies in the region of Contact with the coating roller is the same as the peripheral speed of the coating roller, so that the hollow body and the coating roller roll on one another and under the action of the pressure between the hollow body and the coating roller, a coating transfer from the roller to the hollow body takes place.
  • contact is maintained over the duration of two revolutions of the hollow body with the painting roller plus a short overlap area.
  • the paint supplied by the painting roller is squeezed, so that a paint jam or build-up of paint forms in the feed gap between the respectively approaching areas of the hollow body and the painting roller, which builds up over the entire contact time between the hollow body and the painting roller is preserved.
  • a coating split i.e. a longitudinal separation of the paint film located between the hollow body and the surface of the painting roller, with no uniform tearing off.
  • the degree of the lacquer structure on the hollow body depends to a large extent on the viscosity of the lacquer and also on the peripheral speed of the hollow body and the coating roller.
  • the drivable mandrels of the thorn wheel with the hollow bodies held thereon are driven only over a short section of their movement path in the direction of the painting roller.
  • the mandrels are no longer driven, but the synchronous peripheral speed of the painting roller and the hollow bodies is approximately maintained by the pressure of the roller against the hollow bodies.
  • the circumferential speed of the hollow body and the coating roller is about 2 m / sec in the previously known all-round coating. and can be up to 6 m / sec. be increased.
  • the paint is atomized during the separation of the described individual bridges formed from the paint, so that a paint mist is formed which must be avoided under all circumstances to avoid malfunctions in the devices for carrying out the all-round painting and also to avoid environmental pollution.
  • the object of the invention is to achieve an improvement in the paint application by uniformizing the paint coating on the hollow body, so that a reduction in the paint requirement while maintaining the optically perceptible covering quality or with the same amount of paint as before, an improvement in the covering quality can be achieved.
  • the use of highly viscous paints with little solvent content should also be made possible at economically justifiable peripheral speeds.
  • the method mentioned at the outset is characterized in that the hollow body and the coating roller are separated with different peripheral speeds between at least 2 and a maximum of 6 m / sec. and the hollow bodies are driven at a peripheral speed which is 10 to 80% higher in relation to the peripheral speed of the coating roller during pressure contact with the coating roller, the hollow bodies being driven at a higher peripheral differential speed at the beginning and at the end of pressure contact with the coating roller in the middle of the touch.
  • the noticeably higher peripheral speed of the hollow body compared to the coating roller is not comparable in its size and also in its effect with the possible differential speed between a printing medium and the hollow body to compensate for the desired and actual circumference of the hollow body according to the known method. It effects a hydrodynamic application of the paint film on the hollow body.
  • the lacquer layer acts like a lubricant and, due to the higher peripheral speed of the hollow body compared to the lacquer roller, is drawn into the feed gap to such an extent that there is no lacquer build-up in this gap.
  • the paint is no longer separated as in the case of synchronized roller painting in such a way that the interacting surfaces of the hollow body and the painting roller are lifted off exclusively with the formation of bridges and threads during the paint splitting, but rather due to the higher peripheral speed of the hollow body, the paint film is more or less sheared off in the area of the hollow body radius.
  • the overlap area of the order the accumulation of the paint that would otherwise remain there when the hollow body is lifted from the painting roller is avoided, and at the same time the structure created by the paint splitting and the paint tear-off with the thread formation is not formed, so that a calmed and even paint film is applied to the hollow body.
  • the lacquer tear is oriented towards the surface of the hollow body without any notable thread formation, so that the lacquer gap angle, i.e. the angle between the separating lacquer bridges in the pull-out gap is reduced with increasing speed of difference of the hollow body compared to the painting roller.
  • the all-round painting of the hollow body can take place over a smaller peripheral area of the painting roller compared to the synchronous painting, so that the peripheral area of the painting roller interacting with the mandrel wheel can be shortened compared to the known design and thus a shorter deflection distance of the mandrels from the circular path is required.
  • the new process will it is also possible to process water-based paints, which are known to have poor flow properties and are not suitable for synchronous printing painting.
  • the hollow body having a provisions for a wide range of properties of a coating application.
  • the coating roller with a peripheral speed of about 4 to 4.3 m / sec. to drive.
  • the coating roller has shown that at these peripheral speeds it was possible to achieve particularly favorable results with regard to a uniform coating application.
  • the described type of lacquer separation in the new method makes it possible and expedient to design the method in such a way that the lacquer transfer is carried out by roto-gravure offset.
  • This type of paint transfer is possible for the first time through the invention.
  • the rotary gravure offset printing process cannot be used practically in the case of synchronous printing coating, since this results in increased structure formation on the one hand due to the engraving itself and on the other hand during coating splitting, which according to the invention is compensated for by the higher peripheral speed of the hollow body compared to the coating roller.
  • the invention is based on a device with a rotatingly driven coating roller and a rotatingly driven mandrel wheel, the mandrels of which are arranged perpendicular to the wheel plane and can be freely rotated about their longitudinal axis and to adapt their movement path to the peripheral surface of the mandrel projecting into the circular path of the mandrels Paint roller over a part of the wheel circumference by means of control curves in the direction transverse to its longitudinal axis are held on the thorn wheel.
  • this known device is designed such that a controllable on the mandrels in the area before their deflection from the circular path to adapt to the peripheral surface of the coating roller until the beginning of the deflection and again towards the end of the deflection and the rotation of the mandrel about its longitudinal axis Drive device is provided.
  • the drive device consists of an endless belt drive, the drive section of which is stretched between two deflection rollers arranged in the direction of movement of the mandrel wheel in front of and behind the deflection area of the mandrels and on the mandrels in the area before and at the beginning and towards the end of the deflection supports the circular path.
  • This drive device can be designed in a particularly simple manner and can be designed by the arrangement of the deflecting rollers in such a way that the mandrels are released from the drivable strand as a result of their deflection from the circular path after the start of the painting process, but again enter the path of movement of the strand towards the end of the painting process and therefore from the run can be taken again.
  • the mandrels with the hollow bodies located thereon are driven at the beginning and towards the end of pressure contact with the coating roller with a higher circumferential differential speed than in the middle region of the contact.
  • a part of the mandrel wheel 1 is shown purely schematically, which cooperates with a painting roller 2.
  • the spike wheel 1 can be driven about its central axis 1a in the direction of the arrow 1b and is equipped on its circumference with spikes 3, which are arranged at a uniform spacing on the circumference of the spike wheel 1.
  • the mandrels 3 are rotatably mounted in the mandrel wheel 1 and held rotatably about their longitudinal axes.
  • the hollow body 4 to be painted is held against rotation. They are fed to the mandrels 3 in a known manner and pushed onto them and, after the all-round lacquering, removed again and passed on for further processing.
  • the mandrels 3 are held on the mandrel wheel 1 by means of a control device, not shown in the drawing, for adapting to the movement path of the coating roller 2, which is driven to rotate about its central axis 5, in the direction transverse to its longitudinal axis, so that the mandrels 3 are moved out of the circular path of their central axes, designated overall by 6, in the region of the coating roller 2 along the path 6a and remain in contact with the coating roller 2, which is driven to rotate in the direction of the arrow 7.
  • An endless belt drive 9 which rotates in the direction of arrow 8 and is guided around the deflection rollers 10, 11 and 12, of which at least one is simultaneously designed as a drive roller, is used to drive the mandrels 3. It can be seen that the run 9a of the belt drive 9 rests on the mandrels 3 in order to drive them before their deflection and pressure contact with the painting roller 2 about their central axes and to set them in rotation.
  • the mandrels 3 move away from the strand 9a by their guidance along the movement path 6a, so that the driven in this area is interrupted, but before lifting the hollow body from the painting roller 2 come back into contact with the strand 9a, so that they are driven towards the end of the pressure contact with the painting roller.
  • the mandrels 3a and 3b are still or again driven via the run 9a of the belt drive 9, while the mandrel 3c is out of contact with the run 9a, but lies on the peripheral surface of the coating roller 2.
  • the belt drive 9 brings the mandrels 3 to a peripheral speed which is higher than the peripheral speed of the coating roller 2.
  • the peripheral speeds of the coating roller and the mandrels are between 2 and a maximum of 6 m / sec.,
  • the peripheral speed of the mandrels 3 and / or thereon held hollow body 4 during the pressure contact with the painting roller 2 is 10 to 80% higher than the peripheral speed of the painting roller 2. This results in completely different conditions for the paint application from the painting roller 2 to the hollow body 4 than they do in a synchronous operation, that is same peripheral speed of the hollow body and the coating roller occur.
  • FIG. Schematically shows the conditions in a synchronous printing coating.
  • the peripheral surface 2a of the coating roller 2 moves at a speed V 2 in the direction of the arrow 13.
  • the hollow body 4 is also driven or carried along by the coating roller 2 at a speed V, in the direction of the arrow 14.
  • V I V 2
  • the paint application takes place during the pressing position of the hollow body 4 against the painting roller 2 shown in FIG.
  • the lacquer is separated, that is to say the lacquer splitting, approximately along the bisector 21, the entire angle being referred to as the lacquer gap angle.
  • the hollow bodies 4 are brought by the belt drive 9 to a relatively high differential speed with respect to the painting roller 2 until their pressure contact with the painting roller 2, so that only a relatively thin coating film is applied to the surfaces of the hollow bodies 4 at the beginning of the coating application. Because the hollow bodies 4 are lifted from the drive strand 9a after the pressure contact with the painting roller 2 begins, the difference in their peripheral speed compared to the peripheral speed of the painting roller is reduced by the sliding friction, so that the paint application gradually increases until the end of the painting process renewed drive of the associated mandrel 3 by the renewed attack of the belt drive 9 or 9a.
  • the lacquer application 23 shown on an enlarged scale takes place, which serves as a base 231 of the second lacquer application during the second circulation D 2 .
  • This paint application is designated by 24 in FIG.
  • the paint application 24 increases in thickness until the corresponding hollow body is driven again towards the end of the all-round painting. This point in time or this area of the peripheral surface of the hollow body 4 is indicated at 25 in the development of FIG. 4.
  • the thickness of the paint application is reduced again corresponding to the area 26 until the hollow body 4 lifts off. This results in a paint application, as shown in Fig. 4 by the hatched areas.
  • this varnish application has a relatively constant thickness, which also extends over the overlap area denoted by Ü, this equalization being achieved by the type of drive of the hollow body 4 described in connection with FIG. 1 and by the type of varnish described according to FIG 3 results.
  • the mode of operation described in connection with FIG. 3 also shows that this type of coating application readily decreases
  • the roto-engraving system can be used because the lacquer splitting along the tangent 22 in FIG. 3 and the higher peripheral speed of the hollow body 4 compared to the coating roller 2 means that the lacquer remaining on the surface of the hollow body when the lacquer bridges are separated from this surface adheres to this surface nestles and in this way covers the area between adjacent bridges of the paint. In this way, the gaps between the bridges deliberately placed next to one another for the transfer of lacquer in the roto-engraving method are uniformly covered, so that the roto-engraving structure is no longer recognizable after the hollow body 4 has circulated twice.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (5)

1. Procédé de vernissage circulaire de corps creux cylindriques, tels que corps de boîtes, selon lequel les corps creux (4) sont supportés par des mandrins (3) pouvant être commandés autour de leur axe longitudinal et situés sur une roue à mandrins (1), pressés contre un rouleau de vernissage commandé (2) d'un mécanisme de vernissage qui est parallèle à l'axe de la roue à mandrins, et guidés en commun avec les mandrins (3) le long du contour du rouleau tant qu'ils sont en contact avec le rouleau de vernissage (2), caractérisé en ce que les corps creux (4) et le rouleau de vernissage (2) sont commandés à des vitesses circonférentielles différentes situées entre un minimum de 2 et un maximum de 6 m par seconde et que les corps creux, tant qu'ils sont en contact avec le rouleau de vernissage, sont commandés à une vitesse circonférentielle qui est supérieure de 10 à 80% à la vitesse circonférentielle du rouleau de vernissage (2), les corps creux (4) étant commandés à une vitesse circonférentielle plus haute au début et à la fin de la zone de contact avec le rouleau de vernissage (2) qu'au milieu de la zone de contact.
2. Procédé selon revendication 1, caractérisé en ce que les corps creux (4) sont commandés à une vitesse circonférentielle de presque 6 m par seconde et que le rouleau de vernissage est commandé à une vitesse circonférentielle de 4 à 4,3 m par seconde environ.
3. Procédé selon une des revendications 1 et 2, caractérisé en ce que le transfert du vernis se fait par la méthode d'impression offset à gravure rotative.
4. Dispositif pour la mise en oeuvre du procédé selon une des revendications 1 à 3, muni d'un rouleau de vernissage rotatif commandé (2) et d'une roue à mandrins rotative commandée (1) dont les mandrins (3) disposés verticalement au plan de la roue peuvent être tournés librement autour de leur axe longitudinal et sont tenus sur la roue à mandrins de façon mobile sur une partie de la circonférence de la roue moyennant de cames de commande dans la direction en travers de leur axe longitudinal afin d'adapter la trajectoire de leur mouvement à la circonférence du rouleau de vernissage qui fait saillie dans l'orbite des mandrins (3), caractérisé en ce qu'un dispositif de commande réglable est prévu qui touche les mandrins (3) dans la zone devant leur déflexion de l'orbite en vue de l'adaptation à la circonférence du rouleau de vernissage jusqu'au début de la déflexion et encore vers la fin de la déflexion et qui fait tourner les mandrins (3) autour de leur axe longitudinal.
5. Dispositif selon revendication 4, caractérisé en ce que le dispositif de commande consiste en une commande à courroie sans fin (9) dont le brin de commande (9a) est tendu entre deux galets de renvoi (11, 12) devant et derrière la zone de déflexion des mandrins dans la direction de mouvement de la roue à mandrins et s'appuie sur les mandrins dans la zone devant et au début ainsi que vers la fin de la déflexion de l'orbite.
EP81108013A 1980-10-22 1981-10-07 Procédé et dispositif pour vernir des corps cylindriques creux tels que corps de boîte tout autour de leur pourtour Expired EP0050269B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3039812 1980-10-22
DE3039812A DE3039812C2 (de) 1980-10-22 1980-10-22 Verfahren und Vorrichtung zum Rundumlackieren von zylindrischen Hohlkörpern, wie Dosenrümpfen

Publications (2)

Publication Number Publication Date
EP0050269A1 EP0050269A1 (fr) 1982-04-28
EP0050269B1 true EP0050269B1 (fr) 1985-03-20

Family

ID=6114934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108013A Expired EP0050269B1 (fr) 1980-10-22 1981-10-07 Procédé et dispositif pour vernir des corps cylindriques creux tels que corps de boîte tout autour de leur pourtour

Country Status (3)

Country Link
EP (1) EP0050269B1 (fr)
DE (2) DE3039812C2 (fr)
DK (1) DK149710C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076134A2 (fr) * 1981-09-28 1983-04-06 B. & H. Manufacturing Company, Inc. Dispositif pour enduire des récipients en matière plastique
EP0134158A2 (fr) * 1983-08-22 1985-03-13 Coors Brewing Company Applicateur pour revêtement de base
EP0555730A1 (fr) * 1992-02-08 1993-08-18 Herberts Gesellschaft mit beschränkter Haftung Procédé et appareil pour revêtir des corps cylindriques creux
WO2000033973A1 (fr) 1998-12-07 2000-06-15 Schmalbach-Lubeca Ag Application d'une couche de revetement sur un recipient a paroi mince

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1536978A1 (de) * 1967-01-03 1970-09-17 Hinterkopf Kurt G Maschine zum Bedrucken,Lackieren,Ausruesten,Etikettieren usw.,von tuben-,huelsen- oder rohrfoermigen Werkstuecken in kontinuierlichem Fluss
DE2121725C3 (de) * 1971-05-03 1979-04-26 Kurt G. 7332 Eislingen Hinterkopf Vorrichtung zum Bedrucken oder Lackieren von Hohlkörpern, beispielsweise Tuben
JPS50123741A (fr) * 1974-02-04 1975-09-29
US4089294A (en) * 1976-04-08 1978-05-16 Fox Valley Corporation Tube coating apparatus
US4148948A (en) * 1977-05-13 1979-04-10 Textron, Inc. Water dispersible paints of improved leveling characteristics
US4138965A (en) * 1977-11-14 1979-02-13 American Can Company Apparatus for delivering metered amounts of varnish to the surface of a can, or the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076134A2 (fr) * 1981-09-28 1983-04-06 B. & H. Manufacturing Company, Inc. Dispositif pour enduire des récipients en matière plastique
EP0076134A3 (fr) * 1981-09-28 1984-03-28 B. & H. Manufacturing Company, Inc. Dispositif pour enduire des récipients en matière plastique
EP0134158A2 (fr) * 1983-08-22 1985-03-13 Coors Brewing Company Applicateur pour revêtement de base
EP0134158A3 (en) * 1983-08-22 1986-10-15 Adolph Coors Company Base coat applicator
EP0555730A1 (fr) * 1992-02-08 1993-08-18 Herberts Gesellschaft mit beschränkter Haftung Procédé et appareil pour revêtir des corps cylindriques creux
WO2000033973A1 (fr) 1998-12-07 2000-06-15 Schmalbach-Lubeca Ag Application d'une couche de revetement sur un recipient a paroi mince

Also Published As

Publication number Publication date
DK149710C (da) 1987-04-06
DE3039812C2 (de) 1988-12-01
DE3169419D1 (en) 1985-04-25
DK464781A (da) 1982-04-23
DK149710B (da) 1986-09-15
EP0050269A1 (fr) 1982-04-28
DE3039812A1 (de) 1982-05-27

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