EP0659112A1 - Verfahren und vorrichtung zum kaschieren einer dekorschicht uaf ein dreidimensionales objekt - Google Patents
Verfahren und vorrichtung zum kaschieren einer dekorschicht uaf ein dreidimensionales objektInfo
- Publication number
- EP0659112A1 EP0659112A1 EP93909961A EP93909961A EP0659112A1 EP 0659112 A1 EP0659112 A1 EP 0659112A1 EP 93909961 A EP93909961 A EP 93909961A EP 93909961 A EP93909961 A EP 93909961A EP 0659112 A1 EP0659112 A1 EP 0659112A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laminate
- suction
- pressure
- supporting plate
- pressure chamber
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010030 laminating Methods 0.000 title claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 72
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 239000012528 membrane Substances 0.000 claims abstract description 40
- 239000012790 adhesive layer Substances 0.000 claims abstract description 29
- 239000004922 lacquer Substances 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 11
- 239000011888 foil Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 10
- 238000013022 venting Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005034 decoration Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 16
- 238000010276 construction Methods 0.000 description 7
- 238000003475 lamination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/16—Lining or labelling
-
- 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
- B29C63/0095—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using a provisional carrier
Definitions
- This invention refers to a method for laminating a decorative layer to the surface of a three-dimensional object in a membrane press comprising two chambers which are separated by a membrane and can be subject to different air pressures, one of the chambers containing the object to be decorated, wherein the object to be decorated is brought into contact with the decorative layer, which is pressed against the said surface of the object by a pressure difference in the two chambers acting on the membrane.
- a further subject of the invention is a machine for applying at least one decorative layer to a surface of a three-dimensional object comprising an upper, hood shaped pressure chamber, heating means within the pressure chamber, means for tightly clamping a membrane forming the decorative layer to lower edges of the pressure chamber, a supporting plate for the object to be decorated, means for vertically moving the pressure chamber and the supporting plate, resp., in order to bring the supporting plate and the pressure chamber into and out of contact with each other and to bring the surface of the object to be decorated into contact with the decorative layer, and pressure means for applying pressure to the space limited by the pressure chamber and the membrane as well as suction means for applying suction to the space between the membrane and the supporting plate for the object.
- Machines for laminating decorative sheet material to large flat surfaces usually employ one or more rollers for rolling the sheet material onto the said flat surfaces.
- rollers for rolling the sheet material onto the said flat surfaces.
- Such machines comprise a base and a hollow head, the open bottom of which is sealed by a flexible diaphragm or membrane (EP-A2 0.302.703).
- EP-A2 0.302.703 a flexible diaphragm or membrane
- the three-dimensional object to be laminated is placed on the base and the decorative sheet material to be laminated to the surface of the object is placed over the object.
- the hollow head is placed over the object with the membrane engaging the object.
- air is pumped into the hollow head thus causing the diaphragm to snugly engage and take on the form of the object thereby applying the sheet material to the object.
- Such machines comprising membranes and thereafter called membrane presses have also been used for applying the decorative layer of hot stamping foils onto the surface of an object.
- Hot stamping foils tack onto the surface of an object to be laminated when the foil is subjected to heat treatment. Therefore the known laminating machines usually include a heating means for applying heat to the foil when it is applied to the object.
- One disadvantage of the membrane presses described herein- above is that the membranes used in the machines have to be relatively thick.
- the disadvantage of the use of such thick membranes is that these menbranes do in use not always take on the exact shape of the object to be laminted, especially in very sharp curves or corners, with the result that the lamination is not always smooth and that small creases and bubbles may form in the difficult to reach places.
- a laminate comprising a carrier film as well as at least one decorative lacquer layer and a heat-activateable adhesive layer laminated to the carrier film, that the laminate as a whole is pressed against the surface of the object by a pressure-difference in the two chambers, such pressure-difference being generated by a pressure higher than atmospheric pressure in the pressure chamber on the carrier film side of the laminate and/or by suction in the suction chamber on the side of the laminate with the adhesive layer, and that the carrier film is peeled off the decorative layer after setting of the adhesive layer and respective fixation of the decorative layer to the surface of the object.
- a laminate comprising on the one hand a carrier film and on the other hand a combination of at least one decorative lacquer layer and a thermo- activateable adhesive layer.
- the combination of the decorative lacquer layer and the adhesive layer can be easily separated from the carrier film so that the carrier film can be peeled off from these layers after the at least one lacquer layer has been tacked to the surface of the object by setting of the adhesive material.
- the decorative layer can be very thin, as it needs not be very strong, the strength of the laminate being only dependant from the strength and stability of the carrier film.
- the carrier film of the laminate used according to the invention can be selected only with the view of being extended for completely covering the three-dimensional surface of the object.
- Such film can be rather thin, e.g. consisting from polyester.
- the laminate used according to the invention can very closely follow the surface of the object. Nevertheless there is no danger that the carrier film or the laminate will be destroyed during the application of the laminate to the surface of the object.
- Another, very important advantage of the invention has to be seen in the fact that the at least one decorative lacquer layer can be freely varied and therefore there is a great variety for the decoration of the object.
- the laminate used is a hot stamping foil which may comprise a transparent carrier film.
- Suitable hot stamping foils can easily be developed considering the properties they must have, namely high stretchability of the carrier film and the lacquer layer as well as sufficient strength of the carrier film. If the carrier film is transparent, this is especially advantageous for radiation heating of the decorative lacquer layer and the adhesive layer.
- the laminate is heated prior to being pressed against the surface of the object, there can be a softening of the carrier film and simultaneously an activation of the adhesive layer, which helps more closely adapting the decorative layer to the uneven surface of the three- dimensional object.
- heating of the laminate is effected in at least two steps with different heating energy simultaneously varying the pressure-difference in the two chambers.
- the decorative laminate can best follow the surface irregularities of the object. Additionally the laminate progressively comes into contact with the surface of the object, thus avoiding undue load on the laminate.
- Use of heat emitting lamps has the advantage that the heating energy can quickly be changed and especially that, when the heating means have been switched off, the laminate can rapidly cool, which is advantageous in order to firmly tack the decorative layer to the surface of the object within a short term.
- heating of the membranes or decorative layers is normally effected using a hot surface transferring heat by contact to the membrane or decorative layer. Such hot surfaces cannot rapidly cool down.
- the laminate is preferably cooled down substantially to room temperature prior to the peeling off of the carrier film from the decorative layer tacked to the surface of the object.
- a preferred working cycle of the method according to the invention comprises the following steps -:
- Peeling off of the carrier film is normally effected by proceeding the laminate transversely to the decorated surface of the object and bringing a new section of laminate in the decoration-position.
- the pressure chamber of the membrane press is preferably vented with cool air, while maintaining the suction in the suction chamber.
- a preferred machine for applying at least one decorative layer to a surface of a three-dimensional object using the above described method and comprising the features stated above is characterized in that the membrane being a laminate, comprising a carrier film as well as at least one decorative lacquer layer and a heat activateable adhesive layer laminated to the carrier film, is directly clamped between the lower edges of the pressure chamber and the supporting plate with the adhesive layer contacting the supporting plate, that at least the surface of the supporting plate contacting the adhesive layer is cooled below the softening temperature of the adhesive layer, that there are provided feeding means for transporting and stretchinng the laminate serving as membrane across the opening surrounded by the lower edges of the pressure chamber, and that the heating means are radiation heating means.
- Such a machine is relatively simple in construction, nevertheless guarantees, however, good results in decorating a three-dimensional surface of an object with a laminate as described, especially with a hot stamping foil.
- the cooled supporting plate is important, because only in case the decorative layer of the laminate does not adhere to the supporting plate it is possible to permanently work with the machine and easily peel the carrier film off the decorative layer adhered to the object by the adhesive layer. Further the direct clamping of the laminate between the pressure chamber and the supporting plate is only possible if the laminate does not adhere to the supporting plate, this fact also being helpful for a simple construction of the feeding means.
- the pressure chamber preferably comprises means for interchangeably mounting intermediate partitions having lower edges for clamping the laminate to the supporting plate.
- the partitions can be of a very simple construction because they only must press the laminate against the supporting plate so that suction can be applied to the space between the laminate and the supporting plate.
- the feeding means preferably comprise a winding equipment with a storage roll for the laminate, guiding rolls in alingement with the lower end of the pressure chamber and a wind up roll for the carrier film and rests of the decorative and adhesive layer left on the carrier film after its peeling off from the object.
- a winding equipment with a storage roll for the laminate, guiding rolls in alingement with the lower end of the pressure chamber and a wind up roll for the carrier film and rests of the decorative and adhesive layer left on the carrier film after its peeling off from the object.
- Such winding equipment is known per se and can easily be adapted to the machine of the invention.
- heating means infrared lamps with a wavelength -A of 0.9 to 1.6 ⁇ m.
- This heating means are in a preferred embodiment of the invention horizontally and/or vertically and/or angularly adjustable so that they can be adapted to the shape and size of the object to be decorated. This adaptation can be improved by dividing the heating means, preferably lamps, into different groups, which can additionally be energized differently.
- the object rests on a base plate adapted to the shape of the object such that the subject is vertically spaced from the supporting plate and projects horizontally along its periphery over the base plate, the laminate will when applying the pressure-difference according to the invention follow the surface of the object even beyond the peripheral edges so that also the edges are completely covered by the decorative layer.
- the supporting plate has a central suction opening and the base plate is placed over the suction opening and provided with air passages leading from the suction opening to all parts of the space around the object and between the supporting plate and the laminate.
- the use of a central suction opening especially makes it possible to provide base plates of different shape depending on the shape of the object, all such base plates fitting the same supporting plate.
- the air passages simultaneously make sure that suction or vacuum, resp., is in the whole space between the supporting plate and the laminate.
- suction air passages can consist from distance elements between the base plate and the supporting plate and, the case being, from bores connecting the upper and lower surface of the base plate.
- suction elements such suction elements preferably consisting from a surface area of the supporting or base plate, resp., surrounded by a gasket and connected by a suction duct and a valve to suction means.
- the suction elements are preferably provided at the top surface of the base plate which has at least one separate suction channel connecting the suction elements with a suction joint on the supporting plate, said suction channel not intersecting the suction air passages in and below the base plate.
- the suction joint can be unitary for different base plates, thus making also a fast change of the base plate possible, as it is only necessary to place the base plate onto the supporting plate, at this occasion connecting the suction channel of the base plate to the suction joint in the supporting plate.
- the suction vacuum between the supporting plate and the laminate can in any event be achieved because the base plate has the necessary suction air passages. Nevertheless the suction in the space between the laminate and the supporting plate on the one hand and at the suction joint for the suction elements can of course be separately controlled.
- control means for controlling time and intensity of the heating radiation as well as variation over the time of the pressure in the pressure chamber and the suction in the suction chamber.
- control means can be computer-controlled with the possibility of relatively free variation.
- Such control means can e.g. also comprise several separate control circuits for several groups of heating means.
- Figure 1 shows a schematic front elevational view of a machine according to the invention, partly in vertical section
- Figure 2 shows a schematic side elevational view of the machine
- FIG. 3a and 3b show in a vertical schematic section and in more detail in two different positions the most essential parts of the machine, namely the hood-shaped pressure chamber, the supporting plate, the base plate, and the heating means
- Figure 4 shows diagramatically the pressure variations over the time in the two chambers during a working cycle
- Figure 5 shows diagramatically the intensity of the heating means (two groups) depending on the time in a working cycle.
- the machine is shown in use for lamination of a decorative layer of a hot stamping foil to a toilet- seat because when decorating ring-shaped parts like toilet- seats some special provisions are necessary with respect to the construction of the base plate. Nevertheless the basic construction of the machine is the same irrespective of the three-dimensional object to be decorated.
- the expression "three-dimensional object” shall always mean an object havin ⁇ a thickness of at least several mm and a surface to be decorated which extends out of a plane, so that known rolling methods for application of a decorative layer cannot be used.
- the machine comprises a frame 1.
- a hood-shaped pressure chamber 2 consisting from a top plate 2a and side walls 2b.
- the lower edges of the side walls 2b of the pressure chamber 2 are all on the same level and bearing gaskets 3, the purpose of which will be described later on.
- the pressure chamber 2 houses radiation heating means 4a, 4b.
- the heating means are tube- shaped twin infrared lamps emitting short wave infrared radiation of a wave-length , between 0.9 and 1.6 ⁇ m.
- the lamps are arranged in two groups, namely an outer group of lamps 4a and an inner group of lamps 4b. Both groups consist from four twin-lamps, the outer lamps 4a being arranged in a square along the walls 2b of the pressure chamber 2, the inner lamps 4b being arranged in parallel.
- the lamps 4a of the outer group and the lamps 4b of the inner group can be independently energized in order to transmit radiation or heat of different intensity to the outer and inner regions of the object to be decorated.
- the lamps 4a and 4b are mounted to the top plate 2a or the side walls 2b of the pressure chamber 2 such that their position can be varied horizontally as well as vertically and/or angularly. According to figures 3a and 3b this is e.g. made possible by use of guide rails 5 along which the lamps 4a and 4b can be displaced horizontally.
- holders 6 For vertical adjustment of the lamps 4a and 4b there are provided holders 6 of variable length.
- the lamps 4a, 4b are connected with the holders 6 by joints 7 so that the lamps 4a, 4b can be tilted with respect to the holders 6 for ajusting them angularly, as evidenced by the difference in the position of the lamps 4a when compared to the position of the lamps 4b.
- the pressure chamber 2 is provided with means 8 for interchangeably mounting additional partitions 9 having in the embodiment shown the shape of vertical walls, the lower edges of which are also provided with gaskets 3 and are flush with the lower edges of the side walls 2b of the pressure chamber 2.
- additional partitions 9 is to give the possibility of adapting the pressure chamber 2 to different sizes of laminate used and to guarantee that, even if a laminate of a smaller size is used, such laminate is firmly clamped to the supporting plate.
- feeding means for the laminate 10 comprise a winding equipment with a storage roll 11 on which the laminate to be used can be stored in a sufficient quantity. Further there are provided some guiding rolls 12, two of which are, as can most clearly be seen from figures 3a and 3b, aligned with the lower edges of the side walls 2b or partitions 9 of the pressure chamber 2. Further the winding means have a wind up roll 13 for winding up the carrier film of the laminate 10 together with rests of the decorative and adhesive layer, which are left on the carrier film after the carrier film has been peeled off from the object to be decorated.
- the winding means must, of course, additionally be provided with tension means known per se and not shown to guarantee that the laminate 10 is in the position shown in figure 2 prior to application of the decorative layer to the object.
- the machine additionally comprises a supporting plate 14 which is, as shown in figures 1 and 2, mounted on a traverse 15 for vertical movement by means of a piston/cylinder unit 16.
- a supporting plate 14 which is, as shown in figures 1 and 2, mounted on a traverse 15 for vertical movement by means of a piston/cylinder unit 16.
- guiding rods 17 cooperating with guides 18 on the frame 1.
- the supporting plate 14 has a plane surface 19 cooperating, as shown in figure 3b, with the gaskets 3 at the lower edges of the side walls 2b or the partitions 9 of the pressure chamber 2 for clamping the laminate 10 in between.
- the supporting plate 14 is, when working, cooled to a temperature below the softening temperature of the adhesive layer.
- the supporting plate 14 is provided with ducts 20 for a cooling fluid entering the series of ducts 20, e.g. via the pipe 21 with a valve 22 and leaving through the pipe 23 with the valve 24.
- the valves 22, 24 allow respective controlling of the flow of cooling fluid through the ducts 20.
- Figures 3a, 3b further show that at the surface 19 of the supporting plate 14 there is a suction opening 25 connected to a suction means (now shown) by a conduit 26 and controllable by a valve 27.
- a suction joint 28 for connecting suction elements of the base plate 29 to the suction .conduit 26 and therefore also to the suction means (not shown).
- the suction at the suction joint 28 can be controlled by a valve 30.
- FIGS 3a and 3b there is shown the arrangement of the object 31 to be decorated on the base plate 29. It is essential that the object 31 projects horizontally over the base plate (as shown in figures 1 to 3b). Further the base plate 29 makes sure that the object 31 is placed in a certain distance vertically above the surface 19 of the supporting plate 14.
- the shape of the top surface 32 of the base plate 29 is, as shown in figures 3a and 3b, adapted to the shape of the object 31 to be decorated.
- the object is in the described case a toilet-seat and therefore essentially ring-shaped, also the top surface 32 of the base plate has ring shape with a center depression 33.
- the base plate has a suction channel 34 leading from the surface 32 adapted to the object 31 to the suction joint 28.
- the suction channel 34 ends on the surface 32 of the base plate 29 in an area confined by two gaskets 35, which means that the space between the two ring-shaped gaskets 35, the top surface 32 of the base plate 29 and the lower surface of the object 31 can be evacuated via the suction joint 28 and the valve 30, which allows fixation of the object 31 to the base plate 29 by suction.
- the base plate 29 is further arranged such that between the lower surface of the base plate 29 and the upper surface 19 of the supporting plate 14 there are left suction air passages 36.
- These air passages 36 are in the embodiment shown formed by distance elements 44. It is, however, also possible to form such passages by other means, e.g. in placing a corrugated, perforated sheet metal between the supporting plate 14 and the base plate 29. Further the depression 33 of the base plate 29 is connected by bores 37 with the air passages 36 at the underside of the base plate 29.
- suction opening 25 at the top surface 19 of the supporting plate 14 is connected with all parts of the space below the laminate 10 in the position shown in figure 3b so that suction or vacuum can be generated in the whole space between the top surface 19 of the supporting plate 14 and the laminate 10.
- suction chamber 38 containing the base plate 29 and the object 31 to be decorated, this suction chamber 38 being confined by the supporting plate 14 and the laminate 10 pressed against the supporting plate 14 by the gaskets 3 at the lower edges of the side walls 2b or partitions 9, resp., of the pressure chamber 2.
- the pressure in the pressure chamber 2 can be controlled by introducing or removing air using pipes 39, 40 with valves 41, 42, resp..
- the pipes 39, 40 are connected to the interior of the pressure chamber 2 on opposite sides for enabling an efficient venting of the space within the pressure chamber 2.
- the supporting plate 14 is brought into its lower position shown in figures 1 and 2, this position being below the position shown in figure 3a.
- the object 31 to be decorated is placed on the base plate 29 and fixed on the base plate 29 by suction.
- the valve 30 is opened so that the space between the underside of the object 31, the two ring gaskets 35 and the top surface 32 of the base plate 29 is evacuated.
- a fresh piece of laminate is brought in position such that it adheres to the lower edges and gaskets 3 of the side walls 2b or partitions 9 of the pressure chamber 2.
- a sufficient length of laminate is unwound from the storage roll 11 and a corresponding length of carrier film is wound onto the roll 13.
- the laminate 10 must be on the storage roll 11 in a position such that in use the carrier film is on the side of the pressure chamber 2, whereas the decorative layer and the adhesive layer point downwardly and come during the lamination procedure into contact with the surface of the object 31 to be decorated.
- the laminate 10 is normally a hot stamping film known per se and comprising at least a transparent carrier film, one decorative lacquer layer, and the case being, a heat activateable adhesive layer (in this sequence).
- the decorative lacquer layer can simultaneously be of such a nature that when activated by heat it gets tacky and adheres to the surface. Further it is known from hot stamping foils to provide not only one decorative lacquer layer but several such layers or to have layers with a special design.
- the supporting plate 14 with the base plate 29 and the object 31 is moved upwards against the pressure chamber 2 by activating the piston/cylinder unit 16.
- This upward movement of the supporting plate 14 brings the top surface of the object 31 slowly into contact with the adhesive and decorative lacquer layers of the laminate 10, as shown in figure 3a.
- tensioning means (not shown) provided in the winding or feeding means for the laminate 10 allow that the laminate bridging the bottom of the pressure chamber 2 is kept stretched, may, however, follow the upward movement of the object 31 into the pressure chamber 2 in order to reach the position shown in figure 3b.
- the laminate 10 is clamped between the gaskets 3 at the lower edges of the side walls 2b or partitions 9 of the pressure chamber 2 and the top surface 19 of the supporting plate 14, which means that the space within the pressure chamber 2 is separated by the laminate 10 in a membrane-like manner into two chambers, namely the real pressure chamber 43 above the laminate 10 and the suction chamber 38 below the laminate, the suction chamber containing the object 31 to be decorated resting on the base plate 29.
- the intensity of the heating is increased, preferably in at least two steps.
- the heating lamps 4a and 4b are divided into two groups, it is also possible to heat the two groups with different intensity, which may be necessary depending on the shape of the object 31 to be decorated.
- pressure is applied to the chamber 43 above the laminate 10 in pressing air into this space 43, e.g. in opening the valve 41 of pipe 39 for compressed air, simultaneously keeping valve 42 of pipe 40 closed.
- valve 27 is opened so that suction from the suction means is applied to the space 38 via the air passages 36 and the bores 37 of the base plate 29.
- vent the space 43 within the pressure chamber 2 by cool air.
- valve 42 is again closed, whereafter pressure is again created in the space 43, such pressure one again acting on the laminate 10 and pressing it again against the surface to be decorated. This further pressing action is e.g. for about 10 seconds.
- valve 42 is opened. It is, however, possible to simultaneously close valve 41.
- valve 27 is closed. Venting of the space 38 can then be achieved simply in moving the supporting plate 14 downwardly with respect to the pressure chamber 2 and the gaskets 3. As the laminate 10 is stretched by tension over the bottom opening of the pressure chamber 2, this movement will cause the laminate 10 to at least partly move away from the top surface 19 of the supporting plate 14.
- a new working cycle can be started by placing a new object 31 on the base plate 29 and moving the laminate 10 a sufficient length to have a new piece of laminate 10 cover the bottom opening of the pressure chamber 2.
- the working cycles can be adapted to different laminates and objects to be decorated in varying the heating periods and intensities as well as the pressure and suction, resp.. Further it is possible to work with at least two groups of heating elements radiating at different intensity.
- a typical working cycle is shown in the diagrams of figures 4 and figures 5, the diagram of figure 4 showing the pressure in the pressure chamber of space 43 as well as the suction in the suction chamber 38, resp., whereas the diagram of figure 5 represents the heating cycles of an inner and outer group of infrared lamps.
- a first time period t- ⁇ is a preperatory period in which the necessary movement of the supporting plate 14 and placement of the object 31 on the base plate 29 take place.
- the heating means can, however, be energized in the period p ⁇ at relatively low energy, the intensity of the heaters of the inner group being lower than the intensity of the heaters of the outer group.
- the spaces 38, 43 have been closed, pressure in the space 43 and suction in the space 38 are generated during the period t (figure 4), the pressure in space 43 already being achieved prior to the full suction in space 38.
- the heating period P2 with higher energy of the inner and outer group of the lamps, resp..
- the third heating period p ⁇ is started, in which the inner lamps are working with an intensity of about 80 % and the outer lamps are working with an intensity of about 90 %. It would according to the invention also be possible to work in the periods p ⁇ and p ⁇ with different intensities, depending on the decorative layer and the object to be decorated.
- a further pressure condition is generated in starting period t ⁇ , during which period fresh air is venting the space 43 in the pressure chamber 2 by opening valves 41 and 42.
- This venting period is about 10 seconds and causes substantial cooling of the laminate to a temperature guaranteeing sufficient tacking of the layer to the surface of the object 31.
- pressure in the pressure chamber is again increased in closing valve 42, the period t ⁇ being also about 10 seconds.
- Control of the different pressure and heating conditions as well as of the movement of the supporting plate 14 by means of the piston/cylinder 16 unit is best achieved with the help of a computer, which allows a lot of variations.
- Tests of applicants have shown that the intensity of the heating means should be variable between 0 and 100 % and the different periods for changes in the pressure conditions (t j to t ⁇ ) and heating conditions (p- ⁇ to p ⁇ ) should be variable between 0 and about 60 seconds.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA926679 | 1992-09-03 | ||
ZA926679 | 1992-09-03 | ||
PCT/EP1993/001173 WO1994005483A1 (en) | 1992-09-03 | 1993-05-12 | Method and machine for laminating a decorative layer to the surface of a three-dimensional object |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0659112A1 true EP0659112A1 (de) | 1995-06-28 |
Family
ID=25582057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93909961A Withdrawn EP0659112A1 (de) | 1992-09-03 | 1993-05-12 | Verfahren und vorrichtung zum kaschieren einer dekorschicht uaf ein dreidimensionales objekt |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0659112A1 (de) |
JP (1) | JPH08500784A (de) |
AU (1) | AU4066893A (de) |
WO (1) | WO1994005483A1 (de) |
ZA (1) | ZA936264B (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004945A1 (en) * | 1995-08-02 | 1997-02-13 | Pay Co Products Pty. Ltd. | Membrane press with self-supporting base and closure |
AU682644B2 (en) * | 1995-08-02 | 1997-10-09 | Pay Co Products Pty Ltd | Membrane press with self-supporting base and closure |
DE19736462C2 (de) * | 1997-08-21 | 2003-06-18 | Advanced Photonics Tech Ag | Verfahren und Vorrichtung zum Warmverformen von Thermoplasten |
FI106544B (fi) * | 1997-12-11 | 2001-02-28 | Diapek Oy | Laitteisto ja menetelmä kappaleiden pinnoittamiseksi |
WO2002094548A1 (es) * | 2001-05-24 | 2002-11-28 | Nabuurs Developing, S.L. | Dispositivo calefactor para prensas de vacio |
US6755929B2 (en) * | 2001-09-13 | 2004-06-29 | Huei-Hsin Sun | Method for adhering a titanium layer on material |
US7459120B2 (en) * | 2003-12-04 | 2008-12-02 | Essilor International | Low pressure thermoforming of thin, optical carriers |
EP1658905A1 (de) * | 2004-11-22 | 2006-05-24 | DeMaxZ AG | Verfahren und Vorrichtung zum Anbringen von einer Dekorschicht auf ein Objekt |
JP5549036B2 (ja) * | 2010-11-30 | 2014-07-16 | 布施真空株式会社 | 真空成型方法 |
CN102602113B (zh) * | 2012-03-07 | 2014-11-05 | 深圳创维-Rgb电子有限公司 | 大尺寸复杂面壳表面装饰加工方法及面壳和装置 |
JP5604569B1 (ja) * | 2013-08-05 | 2014-10-08 | 布施真空株式会社 | 加飾フィルムの部分オーバーレイによる部分真空成形方法 |
USD990532S1 (en) | 2021-04-23 | 2023-06-27 | Mayku Ltd | Pressure forming machine |
US11685103B2 (en) | 2021-04-23 | 2023-06-27 | Mayku Ltd | Pressure forming machine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092197A (en) * | 1973-02-02 | 1978-05-30 | Robbins Edward S | Method of securing a thermoplastic covering to a grooved block |
DE3109338A1 (de) * | 1981-03-12 | 1982-09-23 | Volkswagenwerk Ag, 3180 Wolfsburg | "verfahren zum kaschieren eines formteils, insbesondere eines verkleidungsteils fuer die innenausstattung eines kraftfahrzeuges" |
DE3527412A1 (de) * | 1985-07-31 | 1987-02-12 | Kurz Leonhard Fa | Mehrlagige folie, insbesondere heisspraegefolie und verfahren zu deren herstellung |
DE8616114U1 (de) * | 1986-06-14 | 1986-08-21 | Leonhard Kurz GmbH & Co, 8510 Fürth | Prägefolie, insbesondere Heißprägefolie |
AU1381588A (en) * | 1987-07-24 | 1989-01-27 | Davidson Textron Inc. | Method of forming an insert film |
ZA884565B (en) * | 1987-08-07 | 1990-02-28 | Minnesota Mining & Mfg | Method and apparatus for vacuum-application of a film to surface of an article |
DE3819434A1 (de) * | 1988-06-08 | 1989-12-21 | Hoernlein Reinhard Gmbh | Verfahren zum ueberziehen der oberflaeche eines dreidimensionalen formkoerpers mit einer plastisch verformbaren kunststoffolie, vorrichtung zur durchfuehrung dieses verfahrens und mit hilfe des verfahrens und der vorrichtung hergestelltes moebelteil |
US5125994A (en) * | 1989-11-01 | 1992-06-30 | Eastman Kodak Company | Thermoforming method |
-
1993
- 1993-05-12 JP JP6506771A patent/JPH08500784A/ja active Pending
- 1993-05-12 EP EP93909961A patent/EP0659112A1/de not_active Withdrawn
- 1993-05-12 WO PCT/EP1993/001173 patent/WO1994005483A1/en not_active Application Discontinuation
- 1993-05-12 AU AU40668/93A patent/AU4066893A/en not_active Abandoned
- 1993-08-26 ZA ZA936264A patent/ZA936264B/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9405483A1 * |
Also Published As
Publication number | Publication date |
---|---|
ZA936264B (en) | 1994-03-16 |
JPH08500784A (ja) | 1996-01-30 |
WO1994005483A1 (en) | 1994-03-17 |
AU4066893A (en) | 1994-03-29 |
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