FR2837743A1 - Manufacturing panels covered on both sides by aluminum, supplies metal sheet from rolls, and presses it against hot adhesive coating on foam panels - Google Patents

Abstract

A rising table with actuators feeds the plastic foam panels. The top panel is aligned in the working plane and a linear drive pushes the panel along, pressing it against the previous one. Hot roller applicators with vertically-aligned axes, spread the adhesive. Hot adhesive is poured between the rollers by a feed system, the roller gap defining the adhesive thickness. The panel continues over a roller disc table. Aluminum is supplied from rolls located ahead of the feed table. The aluminum sheet supplied, is pressed against the panel by further rollers. The laminated panel continues to the cutter which moves on guides, synchronizing its speed with that of the panels, to make a straight, transverse cut. The panels, in predetermined sizes, are stacked on a second storage table (8). Near the feed rolls, shaping units profile the sheet edges, before adhesion to the foam panels. A second set of discs following hot adhesion, do not spoil the surfaces of the covered panels by contact with them. A variant of the process, describes supply of individual coverings, avoiding feeding from rolls. The laminated panels are cut to size manually. An Independent claim is included for the corresponding panel.

Description

panel (1, 1 ') by heat-shrinkable film (7, 7').

  METHOD FOR THE CONTINUOUS MANUFACTURE OF LAMINATE PANELS

AND THE PANEL OBTAINED

DESCRIPTION

OBJECT OF THE INVENTION

  The present invention relates to a continuous manufacturing process for panels and to the panel thus obtained, among the panels constituted by a

  plastic foam core and a double aluminum cover.

  o The process includes a first step where a continuous supply of coverslips is established, plus the plastic foam plates

constituting the nucleus.

  On both sides, a hot glue coating is applied and

  it is then that the covering strips converge.

  The panel thus laminated passes through a calender which exerts the pressure necessary for total adhesion to then pass a cutting section and

of storage.

  The possibility of interrupting certain intermediate phases making production more flexible by allowing the use of the machine on small

  o non-continuous productions characterizes this process.

,

BACKGROUND OF THE INVENTION

  Sandwich type panels used for closures

  vertical and cover closures are already known.

  The Utility Model under publication number ES1040612U describes a panel with a set of configuration details on its edges

  extremes which facilitate assembly between consecutive panels.

  An improved structure is included in the Utility model under publication number ES1046046U of the same applicant in which a single valid metal profile is used for the two opposite ends of the panel by

  simple rotation of it at 180 and with a shape of its adapted section.

  Likewise, there are various registers describing methods of manufacturing laminate panels with various applications, so that

  said processes are adapted to the special structure of the panel produced.

  The European patent under publication number EP0876887 refers to a method to be used during the manufacture of panels where particular emphasis is placed on the elimination of contaminating emissions in the production

  panels with cellulosic material from wood.

  s The elimination of emissions is achieved by implementing a two-stage drying step, with air reuse and its subsequent use

in the combustion chamber.

  Mention should also be made of the patent under publication number ES2147908 referring to a process for the manufacture of a panel or similar element o having structural and acoustic properties and the panel thus obtained o a process is described. a sandwich type panel consisting of a core of open honeycomb structure in which fabrics are included

  made of mineral or synthetic fibers impregnated with a thermoplastic resin.

  Current methods of manufacturing laminate panels consisting of the introduction of cover panels of the same dimensions as the

  foam plastic core require a discontinuous and manual process.

  During this process, cold adhesives are introduced and on these, the coverslips to then assemble them on a press requiring

a cleaning time.

  o On this press, you can introduce several panels to assemble and you have to wait for the necessary time for the curing of the adhesives to be

  sufficient to allow handling.

  The present invention consists of a continuous process which makes use of hot-applied adhesives and moreover, which is sufficiently flexible for its

  discontinued use for small manufacturing batches.

DESCRIPTION OF THE INVENTION

  The present invention relates to a continuous manufacturing process for laminated panels and to the panel thus obtained which admits a certain degree of flexibility so when only certain steps completed manually are used when small batches of a certain type are required. of panels We have already mentioned in the previous paragraph panels made up of

hand and batch pressed.

  Wait times on the press are high and greatly limit the

production level.

  The present invention introduces the use of hot glues so that the machines which apply them combined with suitable feeders, plus continuous pressing and cutting devices, make it possible to obtain

  panels without interruption or waiting time.

  s The type of panel to be manufactured is formed by a plastic foam core available in sheets and by a metal covering, of

  preferably aluminum, glued on both sides of the panel.

  In a conventional manufacturing process, the overlaps are

  metal lamellae having the same dimensions as the core plates.

  o We apply the glue by hand on both sides and then introduce the

  slats and press on the press.

  In the process which is the subject of the invention, the metal strips come from coils, one for the upper covering and the other for the lower covering and the cores are always plates of a determined size. Continuous production will make it possible to obtain a single panel whose core is formed by successive plastic foam panels in contact

  on its consecutive edges coated continuously.

  It is the cutting machine that will determine the length of each o panel regardless of where the core connections will have been located, these connections affecting neither the exterior aesthetic appearance nor its

resistance behavior.

  During the raw material supply stage, the plastic foam plates are stacked on a table which can be lifted so that, each time a plate is supplied on the glue line, the table

  rises a height equivalent to the size of the nucleus.

  The lifting table of foam plastic plates is located on transverse sliding means allowing its removal in order to be able to add a new table with more plates and

o continue production.

  The plastic foam plates are fed from the top of the stack by a linear actuator which pushes the plate

  top towards the hot gluing machine.

  This gluing machine mainly consists of two heated rollers, one arranged above the plate to be glued and the other

  arranged below and whose axes are vertically aligned.

  The two rollers have an auxiliary roller which rotates in opposite directions, of smaller dimensions, separated at a decisive distance from

  the size of the strip of adhesive that will be applied to the panel.

  Between the main roller and the auxiliary roller, the hot adhesive is poured using a feeder so that there remains sufficient above the point of least relative distance between rollers.

  ensure a continuous coverslip on the applicator roller.

  The strip of adhesive which remained on the surface of the applicator roller o comes into contact with the foam plastic panel, leaving the sufficient quantity, since it has been calibrated by adjusting the distance between

  applicator roller and auxiliary roller.

  The applicator rollers rotate at a linear speed around their perimeter equal to the speed of advance of the core to be bonded, the roller

  upper in one direction and the lower roller in opposite direction.

  This opposite direction forces the auxiliary rollers of one and the other applicator roller to be on opposite sides of the vertical alignment axis and

  allow hot adhesive to stick between them without it falling.

  By selecting the right adhesive and working temperatures, or the times available to introduce the coatings and subsequent pressing

are defined.

  The aluminum slats for the panel coating come from two coils, one feeds the upper strip passing over the gluing machine and the other feeds the lower strip passing from below as well from the feed table of foam plastic panels

than from the gluing table.

  The two lamellae converge at the same point and are applied to

  using rollers until it comes into contact with the adhesive carrying the core.

  After the hot adhesive has been applied, the core is transported using disc tables, i.e. tables with staggered alignments of discs with sharp edges which minimize contact with adhesive

of the panel and provide its support.

  Once the cover strips are assembled, the assembly passes through a calender consisting of two rollers, one upper and the other lower which

  apply a precalibrated load to the aid of actuators.

  After passing the grille, the panel is glued and even if it takes a cleaning time until reaching a maximum level of resistance, the panel can be handled and in particular cut into sections

of the desired length.

  The cut is made using a saw traversing the panel transversely. Since the panel advances at a constant speed, the saw is installed on means of transport which print the same speed so that

  the relative movement between the two means is zero.

  oThe cut will have to start once the two movements are synchronized, that of the saw and that of the panel and once it is finished, it will have to return again to its initial position to carry out the

next cut.

  Once cut, the panels are placed on a table that receives them

and they are stacked.

  In addition, it is possible to include a profiling machine on each cover strip so that it configures the edges with a determined profile of

side finish.

  These profiles make the strip rigid and therefore, the opliage points present between the roll forming machine and their assembly point on the panel must have sufficiently high radii so as not to produce

unwanted folds.

  In this manufacturing process, it is possible to interrupt the feeding of continuous coverslips so that the

  glued panels are treated one by one on the subsequent sliding table.

  On this table, they can be treated by hand by superimposing lamellae of the same dimension on the two faces and then introducing them into the calender. In this alternative process, the saw is canceled so that it simply allows the panel thus produced to pass after it has passed through the calender. In this way, hot gluing of small batches or test batches is

  possible without the need to start the process continuously.

  The interrupted passage of cores by the gluing machine does not imply any disadvantage, since the strip of adhesive which was not applied because it did not come into contact with the plastic foam core arrives again at the small deposit of hot glue which is established between

  the applicator roller and the auxiliary roller.

  The panel thus obtained is formed by a plastic foam core on which, bonded with hot-application glue, we show on one side and

  on the other the respective covers, preferably aluminum.

DESCRIPTION OF THE DRAWINGS

  This descriptive memory is completed by a set of plans, illustrating

  o the preferred example and never limiting the invention.

  Figure 1 shows a theoretical and complete diagram of the elements

  involved in the panel manufacturing process.

  FIG. 2 is a larger representation than FIG. 1 of the step of supplying raw material, both of the cores and of the covers. Figure 3 is a larger representation than Figure 1 of the gluing step, transport and subsequent assembly of the cover slats. Figure 4 is a larger representation than Figure 1 of

  o the stage of pressing by calender, cutting and storage of the finished product.

  PREFERENTIAL IMPLEMENTATION OF THE INVENTION

  In view of the above, the present invention consists of a continuous manufacturing process for laminated panels and of the panel thus obtained where the production line uses hot gluing of the lamellae.

  coating with possibility of profiling their edges.

  FIG. 1 represents the complete process for manufacturing the panels with all the elements involved and in FIGS. 2, 3 and 4, the three main stages are represented between which the complete process can be divided into

o larger size.

  The panel manufactured using the process forming the object of the invention is formed by a core (6) of plastic foam and a coating on each of its faces consisting of a metal strip (1.1), preferably in

  aluminum, bonded by hot interlining.

  The foam plastic plates (6) are rectangular plates

of a specific size.

  These plates (6) are stacked on a table (2) which can be lifted using actuators (2.1) so that the last plate, the upper plate,

  is located at the height of the line of advance of the panel.

  This table (2) can move transversely to the main axis of the production line using displacement lines (2.2) allowing the table (2) to be changed, once all the panels (6) have been exhausted by a other table

with a new stack.

  On the top of the stack of foam pisques (6), there is a pusher (3)

  o pneumatic with linear actuation.

  This pusher (3) bears on the edge of the upper panel (6) (left edge according to the orientation of the schematic representation of FIG. 1 with the aid of a raising (3.1) so that it pushes the panel (6) until it comes into contact with the panel (6) which is already passing through the machine

s of sizing (4).

  The panels (6), one after the other and in contact, pass through the gluing machine (4) for application on both sides of the hot adhesive. The gluing machine (4) is formed by two rollers (4.1, 4.2) with o horizontal axes and aligned vertically, heated and between which pass

the panels (6) to be glued.

  To each of the main rollers (4.1, 4.2) is associated an auxiliary roller (4.3, 4.4) located so that between the two forms a deposit of hot glue which flows from a feeder (4.5). '' Given the opposite rotation of one applicator roller (4.1) and another (4.2), their respective auxiliary rollers (4.3) and (4.4) are located on the right

  and to the left so that the glue stored between the two flows down.

  Between each applicator roller (4.1, 4.2) and its auxiliary roller (4.2, 4.4), an adjustable spacing distance is established which determines the width of

  o the glue strip which is adhered to the applicator roller (4.1, 4.2).

  This applicator roller (4.1, 4.2) is heated to maintain the fluidity of the adhesive. In rotation, it comes into contact with the core (6) in

  plastic foam and leaves most of the adhesive on deposit.

  The presence of an upper applicator roller (4.1) and another

  lower (4.2) allows the adhesive to be applied to both sides at the same time.

  From this moment, the panel is transported on a table (11) formed by alignments of discs (11.1) with the sharpened edge, so as to allow to support and guide the panel (6) glued without removing the adhesive. In turn, two coils (1) of coating, preferably aluminum slats, feed two transport lines, one above which the slat (1.1) passes over the table (2) of panels (6 ) and the gluing machine (4) and another lower one on which the strip (1.1) passes under

o these same mechanisms.

  The two lamellae (1.1) converge by means of rollers (4.6) of

  guides that apply them to the surface with adhesive.

  Once the two coverslips (1.1) are assembled, they enter a calender (5) formed by two pressure rollers (5.1) pushed by

  s two actuators (5.2) which determine the pressure to be exerted.

  After this step, a continuous coated panel is obtained which must be

  cut into panels (9) of a specific size.

  The cutting is done by means of a cutting unit (7) installed on a

  structure movable linearly in the direction of exit of the panel (6).

  o The linear movement of the cutting unit (7) is done on guides

  (7.1) which embrace the travel distance.

  The panels (9) already cut are stored on a table (8) on which

  they are stacked and this is changed according to their filling.

  The slats (1.1), after the reel (1) and before reaching the rollers (4.6) for approaching the glued panel (6), can be folded by a roll forming machine

(10) which acts on their edges.

  The edges can thus show the process finish on the edges

sides of the finished panel (9).

  The greater rigidity that presupposes the presence on the edges of folds so configuring a particular section must be taken into account during the trajectory until the approach of the panel (6) glued o, including at this point, it must not not be subjected to a bending with a radius of its director beyond

  that which can be admitted without producing folds which would damage the profile.

  Once the continuous process has been defined, all that remains is to determine the operating instructions for the production chain that we want to use for the

  manufacture of a few front plates, manual con.

  In this case, the plates (6) are fed without forcing to enter one after the other and in contact with the gluing machine, but so that only one plate (6) enters when the worker acts on the pusher adjustment means (3) When the gluing step (4) does not receive any panel (6), simply follow the applicator rollers (4.1, 4.2) by turning with their auxiliary rollers (4.3, 4.4) so that the strip of adhesive is transported to the surface of the applicator roller (4. 1, 4.2) to the deposit between rollers o is poured

o hot adhesive.

  The means of supply (4.5) of the adhesive will detect the lack of consumption and will cease to supply it until an expense occurs. Once the panel (6) enters the rollers (4.1, 4.2), these

  s act and apply the adhesive.

  The panel (6) continues to move until it remains on the disc table (11) (11.1) without the presence of the coverslips (1.1)

upper and lower.

  Since the supply of the panels (6) is discontinuous, the latter are not pushed and they simply remain on the table in question (11). At this point, the panel (6) can be manipulated by hand by adding

  example of coverings already cut to measure.

  Once these coatings have been applied by hand, they can be placed on the same table (11) and the panel inserted into the grille (5) for pressing. During this operation, the cutting unit (7) is canceled and simply lets through the finished panel (9) which does not need to be cut, to

  be stored on the receiving table (8).

  Since the disc table (11) is specially configured so that the discs (11.1) do not remove the adhesive from the plastic foam panel (6), this table can have a second set of wheels to support the panel with coating applied so that they emerge above

  of the previous ones and do not affect this coating.

  s Variations in materials, namely the shape, size and arrangement of the component elements, described in a nonlimiting manner, do not modify the essential character of this invention; the latter is sufficient for an expert

proceeds to its reproduction.

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Claims (4)

REVEN DICATIONS   1.- Process for the continuous production of laminated panels, among the methods for manufacturing panels for vertical closings, characterized in that it comprises a first step of supplying panels (6) of plastic foam consisting of a table (2) which can be lifted by actuators (2.1) which, after each supplied panel (6) locate the upper arranged panel (6) in alignment with the main working plane, and a linear hauling means (3) which, at by means of a raising (3.1) pushes o the panel (6) by pressing on that which is already treated by the gluing unit (4) with hot adhesive, o this gluing unit (4) consists of two horizontal applicator rollers (4.1, 4.2) with vertically aligned axes, heated and each having an auxiliary roller (4.3, 4.4) so that between the applicator roller and this auxiliary roller is poured the hot adhesive by means of filler (4.5), the gap between rollers defining the thickness of the adhesive strip. Once glued, the panel (6) passes over a disc table (11) (11.1), after which the covering strips (1.1), preferably aluminum, coming from respective coils (1) located in front are approached. the panel feed table (2) (6), one upper and one lower slat, brought closer to the panel (6) using the adhesive by means of rollers (6) after which the panel passes to a cutting unit (7), unit (7) which can be moved by guides (7.1) so that it synchronizes their speed of movement with that of the panel to be cut (6) to obtain a cross section after which one obtains the panels (9) cut to predetermined dimensions to finally be stacked   on a second storage table (8).   2.- A method of continuously manufacturing laminated panels according to the first claim characterized in that after the coils (1) for supplying the metal covering strip (1.1) and before the strips o (1.1) do not come into contact with the panel (6) with the adhesive, are interposed profilers (10) which configure the edges of the lamella (1.1) upper and lower.   3.- A method of continuously manufacturing laminated panels according to the first claim characterized in that the table (11) disposed after the hot gluing step (4) has a second set of discs which n '' does not abment by pressing the coatings of the panels 4.Process of continuous production of laminated panels according to the third claim characterized in that the supply of the covering strips (1.1) is not from the coils (1 ) and that the supply of panels (6) is done one by one so that after gluing, custom coating plates are applied manually. Thereafter, they are again deposited on the table (11) with the first or second set of discs (11.1) for the subsequent passage through the calender (5), where the cutting unit (7) is   remained canceled by the uselessness of operating on the finished panel (9).   o 5.- A method of continuously manufacturing laminate panels according to the fourth claim characterized in that the cutting unit (7) is used by action done manually to obtain panels (9) of   smaller dimensions than that of the original panels (6).   6.- Laminated panel manufactured by the previous process characterized by the fact that it is constituted by a plastic core (6) coated with strips (1.1)   of metal assembled with hot adhesive.