WO2002043970A2 - Dispositif destine a l'adhesion electrostatique d'un film encreur sur des objets - Google Patents

Dispositif destine a l'adhesion electrostatique d'un film encreur sur des objets Download PDF

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Publication number
WO2002043970A2
WO2002043970A2 PCT/EP2001/014201 EP0114201W WO0243970A2 WO 2002043970 A2 WO2002043970 A2 WO 2002043970A2 EP 0114201 W EP0114201 W EP 0114201W WO 0243970 A2 WO0243970 A2 WO 0243970A2
Authority
WO
WIPO (PCT)
Prior art keywords
accordance
film
adhesion
sack
vacuum
Prior art date
Application number
PCT/EP2001/014201
Other languages
English (en)
Other versions
WO2002043970A3 (fr
Inventor
Giovanni Bortolato
Original Assignee
Azzini, Daniela
Urbani, Ines
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 Azzini, Daniela, Urbani, Ines filed Critical Azzini, Daniela
Priority to AU2002216069A priority Critical patent/AU2002216069A1/en
Publication of WO2002043970A2 publication Critical patent/WO2002043970A2/fr
Publication of WO2002043970A3 publication Critical patent/WO2002043970A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0043—Fixing the layers by electrostatic charges, by the use of structured surfaces or by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0056—Provisional sheathings
    • 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
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/035—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic
    • B41M5/0358—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet by sublimation or volatilisation of pre-printed design, e.g. sublistatic characterised by the mechanisms or artifacts to obtain the transfer, e.g. the heating means, the pressure means or the transport means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively

Definitions

  • the present invention relates to a device and a process for the formation of a sack with a film of electrically insulating material enclosing an object and its prior adhesion to said object by the use of electrostatic attraction forces .
  • the industry branch of decoration of objects of any type and form by the process of sublimation of inks reproducing the drawing it is wished to transfer the need to be able to cause adherence of said film to the object to be decorated in a precise and continuous manner is strongly felt to avoid the formation of folds, wrinkles and bubbles of said film on the surface of the object which once the drawing is transferred would cause loss of the continuity thereof just in the above mentioned zones-
  • the film is made to adhere to the surface of the object by the application of a vacuum so that it is easy to infer that as there is no possibility of guiding the film on the surface of the object the adhering film would display just the shortcomings mentioned.
  • the process of adhesion and vacuum formation is broken into two successive steps, as follows.
  • a first step a light vacuum is formed so that adhesion of said film to the support would allow appropriate rearrangement of the film by hand by several workers so that it would have no defects of overlapping or zones where the film would not adhere because of air bubbles .
  • the necessary vacuum to ensure full adhesion of the film to the object is created so as to send it into an oven whose temperature would be suited to the process of transfer of the inks representing the drawing by sublimation.
  • a first method of ensuring adhesion of the sheet to the section shape consists of manually winding the film around it and then introducing it between two planes of the right size, seven or eight meters, made up of two elastic and impermeable membranes .
  • peripheral perimeters of the various sections have many shapes, the same number of counter- shapes would be needed with an unacceptable increase in tooling and production costs.
  • a simpler technique for making the sheets adhere to the sections is to use known machine types to create a sack enclosing the section.
  • This sack is constructed by means of a sheet of inked film on which the section is laid.
  • the first step involves the use of low suction to create a vacuum inside the sack so that the adherence thereof to the section surface is light.
  • the workers can operate manually to appropriately smooth any folds which might be formed and adapt the film to the section profile by hand.
  • suction is increased to make the film perfectly integral with the section surface.
  • a device for the prior adhesion of inked film sacks for transfer by sublimation of a graphic representation onto objects comprising means for vacuum creation, means for the creation of electrical charges, means for transfer of said charges to the inked film and means for forcing the inked and electrostatically charged film into the surface recesses of said objects.
  • FIG. 1 shows diagrammatically a side elevation of a machine with known technology used for the formation of sacks of appropriate materials.
  • the machine is to form a sack by means of an inked film around a metallic section which is to be decorated by sublimation.
  • FIG 1 shows a diagrammatic plan view of the machine of FIG 1
  • FIG 3 shows an axono etric projection of the new invention as a means of sack formation seen in some of its details after functional changes applied to a machine similar to the one of FIG 1,
  • -FIG 4 shows an enlarged view of the simple structure of the sack forming means
  • -FIG 5 shows a view of the input side of the film of the means mentioned in FIG 4 ,
  • FIG. 6 shows a side elevation of the machine built with the new forming means
  • FIG. 7 shows a plan view of the machine of FIG 6. The operation of one of these machines is summarized as follows.
  • the section (1) is laid on the running belt (2) on which is deposited the plastic film (3) which before deposit thereon of the section (1) is passed through the forming means of said sack (6).
  • FIG 1 which is a side perspective view is seen the cylinder from which the film (7) is unwound, a tightener for the film (8), the opposition roller (9) and the motor for unwinding the film (10).
  • the film passes through the pairs of guides (4) and (5) FIG 2, arranged on the two sides of the film, enters the sack forming means (6) made up of two metallic plates, upper internal (12) and lower external (13), shaped, superimposed and arranged diagrammatically in accordance with FIG 4 so that they leave a space (14) inside the geometrical solid of which they are composed.
  • the inked film passes through the space (14) between the two metallic plates of the means (6).
  • At the outlet its upper edges are entrained by the three pairs of opposed wheels (15) and (16) which rotate with tangential speed equal approximately to the speed of translation of the running belt (2) of FIGS 1 and 2.
  • the section (1) entrained by the belt (2) passes into the sack forming means (6) running on the upper surface of its metallic plate (12) and meeting at the outlet the film (3) running between the two plates (12) and (13) forming the surfaces of the means (6).
  • the lower part of the section rests on the film while the two edges of the upper part of said film are welded together by both-sides- adhesive tape, by heat or by an ultrasound welder (17) swinging against the opposing wheel (18) thus forming a tubular sack (27) open only at the ends and designed to enclose the section, FIG 1.
  • another running belt (11) pulls the assembly made up the plastic film sack (27) and the section (1) until it frees the forming means (6).
  • the sack is cut at an appropriate distance from the outlet mouth (20), FIG 2, of the forming means (6) and from the end of the section to allow resumption of the production process with the next section, FIGS 1 and 2.
  • the sack containing the section is taken by the workers and deposited on a bed traversing on rails which once a certain number of deposited sections is reached allows transportation thereof into an appropriate oven whose temperature is capable of starting the sublimation process.
  • the sacks Before being introduced into the oven the sacks are connected at the ends to appropriate suction means to . create a vacuum so that the film of which they are made can adhere to the surface of the sections . Then by means of the bed on which they were deposited the sacks are placed in the baking oven for sublimation of the inks and transfer of the drawing. It is clear that this type of industrial process implies the shortcomings mentioned of folds and possibly bubbles due to the imperfect adherence to the section surface with the resulting manual work by the workers to remedy the sack malformations.
  • the invention consists of a device allowing sacking and shaped prior adhesion of the film to the section surface. Said adhesion is achieved by formation of a slight vacuum and an electrostatic charge deposited on one of the film surfaces.
  • Mechanical means stretch and adapt the film to allow its adhesion to the section surface without formation of folds and overlapping of the drawing to be transferred before its deposit on the carriage which allows its final processing without further costly manual operations.
  • FIG 4 is a perspective view showing the known sack forming means (6) with the film (3) formed by the lower (12) and upper (13) metal plates detached from each other so that, in the space between them (14) passage of the film on the input (19) and output (20) sides is allowed.
  • the upper part (13) of the forming means (6) is advantageously modified so that, being usually open in the prior art, it is closed above by a cover (25) on which is engaged a small suction hood (21) connected by a tube (22) to a suction blower (23) which discharges the sucked air through the vent (24)
  • the input side (19) of the forming means (6) is closed by two sets of flexible blades (39) which depart from the upper inlet edge ( 26 ) of the side (19) and terminate at the height of the belt plane (2) on which the film (3) runs, FIG 5.
  • the purpose of the flexible blades is to partially close this side to the air sucked by the hood (21).
  • FIG 5 the flexible blades are arranged by bending along the edges of the section ( 1 ) so as to leave little free space for suction of the air which is thus sucked mainly from the interior of the sack being made.
  • an ultrasound welder (17) closes the upper edges of the film so as to form a tubular sack inside which there is the aluminum section, FIGS 3, 6 and 7.
  • a brush (29) of conductive material shaped so as to touch the lower surface of the film in contact with the section, FIGS 3, 6, 7.
  • the brushes (30) are installed on pins driven by a variable speed motor and each unit of two is counter-rotating so as to apply traction in addition to pressure on the wrapping film so as to stretch any wrinkles and overlapping, FIGS 3 and 6.
  • a last brush (38) again charges electrostatically the entire surface of the already formed sack to force it to adhere further to the section.
  • the electrical charges deposited thereon preserve the sought adherence long enough so that once the sack is cut at the end of the section the workers can arrange it on the bed where it is to be subjected to a final vacuum before being sent into the sublimation oven.
  • the present invention as described is susceptible of numerous changes and construction variants falling within the scope of the inventive concept allowing for construction variants due to the certain disparity of surface shape of the objects it is desired to decorate and to the manner of depositing the electrical charges on the film surface or the mechanical processes for pushing said film even into the more hidden recesses of said objects.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Packages (AREA)
  • Making Paper Articles (AREA)
  • Decoration By Transfer Pictures (AREA)

Abstract

Un procédé industriel connu de décoration d'objets au moyen d'un film présentant un dessin représenté par des encres spéciales, transférées par sublimation sur l'objet à décorer, présente un inconvénient lié à la création de l'adhérence parfaite du support encreur à l'objet à décorer. Cette adhésion est fixée au moyen de systèmes créant le vide ou par l'utilisation de films plastiques spéciaux présentant une certaine élasticité mais dont les coûts sont trop élevés pour une utilisation industrielle pour des objets requérant des coûts de production bas. L'utilisation de la technologie du vide présente des coûts industriels bas mais nécessite des opérations manuelles consistant à étirer parfaitement le film encreur sur l'objet à décorer, de manière que le dessin ne se chevauche pas, ces opérations ralentissement le procédé de production. L'invention concerne un dispositif et un procédé permettant d'éliminer ces opérations manuelles et, par conséquent, d'obtenir des avantages évidents aux niveaux économique et productif.
PCT/EP2001/014201 2000-11-30 2001-11-29 Dispositif destine a l'adhesion electrostatique d'un film encreur sur des objets WO2002043970A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002216069A AU2002216069A1 (en) 2000-11-30 2001-11-29 Device for electrostatic adhesion of inked film onto objects

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20002580 ITMI20002580A1 (it) 2000-11-30 2000-11-30 Dispositivo per la formazione di un sacchetto con film di materiale elettricamente isolante racchiudente al suo interno un oggetto e della s
ITMI2000A002580 2000-11-30

Publications (2)

Publication Number Publication Date
WO2002043970A2 true WO2002043970A2 (fr) 2002-06-06
WO2002043970A3 WO2002043970A3 (fr) 2003-08-07

Family

ID=11446151

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PCT/EP2001/014201 WO2002043970A2 (fr) 2000-11-30 2001-11-29 Dispositif destine a l'adhesion electrostatique d'un film encreur sur des objets

Country Status (3)

Country Link
AU (1) AU2002216069A1 (fr)
IT (1) ITMI20002580A1 (fr)
WO (1) WO2002043970A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037506A1 (fr) * 2004-10-06 2006-04-13 Lasa Impianti S.R.L. Procede et equipement de decoration en continu de formes structurales par sublimation
WO2007129210A3 (fr) * 2006-05-10 2009-02-26 Viv Int Spa Appareils et procédés pour décorer des objets

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626772A1 (de) * 1975-07-02 1977-01-27 Stork Brabant Bv Verfahren und einrichtung zum transferdruck
EP0455849A1 (fr) * 1990-05-08 1991-11-13 POLYTREND GESELLSCHAFT FÜR POLYMERE WERKSTOFFE & OBERFLÄCHENTECHNIK MBH Méthode et appareil pour le transfert d'une décoration en couleur à un substrat plastique ou à un substrat plastique décoré
EP0721886A1 (fr) * 1995-01-13 1996-07-17 Burton's Gold Medal Biscuits Limited Machine pour emballer des articles dans une bande conformée en tube
WO1996029208A1 (fr) * 1995-03-22 1996-09-26 Verniciatura Industriale Veneta S.P.A. Procede de fabrication d'elements profiles, extrudes, decores
EP0888905A2 (fr) * 1997-07-04 1999-01-07 V.I.V. International S.p.A. Procédé et appareil pour imprimer et décorer avec des encres sublimables
EP0950540A2 (fr) * 1998-04-15 1999-10-20 V.I.V. International S.p.A. Procédé de fabrication des objets issus de l'artisanat peints et/ou décorés différemment de façon variée par transfert de couleurs sublimables
EP0953457A2 (fr) * 1998-04-30 1999-11-03 Giovanni Bortolato Appareil et procédé pour transferrer des représentations graphiques sur un objet par sublimation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626772A1 (de) * 1975-07-02 1977-01-27 Stork Brabant Bv Verfahren und einrichtung zum transferdruck
EP0455849A1 (fr) * 1990-05-08 1991-11-13 POLYTREND GESELLSCHAFT FÜR POLYMERE WERKSTOFFE & OBERFLÄCHENTECHNIK MBH Méthode et appareil pour le transfert d'une décoration en couleur à un substrat plastique ou à un substrat plastique décoré
EP0721886A1 (fr) * 1995-01-13 1996-07-17 Burton's Gold Medal Biscuits Limited Machine pour emballer des articles dans une bande conformée en tube
WO1996029208A1 (fr) * 1995-03-22 1996-09-26 Verniciatura Industriale Veneta S.P.A. Procede de fabrication d'elements profiles, extrudes, decores
EP0888905A2 (fr) * 1997-07-04 1999-01-07 V.I.V. International S.p.A. Procédé et appareil pour imprimer et décorer avec des encres sublimables
EP0950540A2 (fr) * 1998-04-15 1999-10-20 V.I.V. International S.p.A. Procédé de fabrication des objets issus de l'artisanat peints et/ou décorés différemment de façon variée par transfert de couleurs sublimables
EP0953457A2 (fr) * 1998-04-30 1999-11-03 Giovanni Bortolato Appareil et procédé pour transferrer des représentations graphiques sur un objet par sublimation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037506A1 (fr) * 2004-10-06 2006-04-13 Lasa Impianti S.R.L. Procede et equipement de decoration en continu de formes structurales par sublimation
US7931770B2 (en) 2004-10-06 2011-04-26 Lasa Impianti, S.r.l. Process and equipment for continuous decoration of structural shapes by sublimation
WO2007129210A3 (fr) * 2006-05-10 2009-02-26 Viv Int Spa Appareils et procédés pour décorer des objets
US8726964B2 (en) 2006-05-10 2014-05-20 Decoral System Usa Corp. Apparatuses and methods for decorating objects

Also Published As

Publication number Publication date
ITMI20002580A1 (it) 2002-05-30
AU2002216069A1 (en) 2002-06-11
WO2002043970A3 (fr) 2003-08-07

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