DE1219667B - Device for coating the surfaces of a carrier material with plastic - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

ÄÜSLEGESCHRIFT

Inta .:

Number:
File number:
Registration date:
.Display day:

B29d

German class: 39 a3- 9/00

1219 667
L41491X / 39a3
March 15, 1962
June 23, 1966

The invention relates to a device for coating of surfaces with plastic or lacquer, which is applied to the carrier material in a liquid, viscous or paste-like state is applied.

It has long been known to coat surfaces with plastics to create a more pleasing surface to achieve, to achieve chemical protection, or else in order to be mechanically less stable Support materials, such as. B. chipboard to stabilize mechanically and chemically. Particularly difficult Coating of carrier materials, which is rough and irregular, is complex Surface properties are.

When using solutions or dispersions or emulsions of film-forming Substances such as high polymers, or even undiluted high polymers, have so far been forced to use many To let work steps follow one another. For example, one had to veneer chipboard, prime, leveling or filling, sanding, topcoating and, if necessary, re-treating. also was a longer drying time is required.

When coating building boards with liquid or paste-like plastics, it has also been shown that that it is difficult to apply the plastic compound in a uniform layer thickness. A Troweling on by hand has proven to be inadequate and inefficient.

It has also been proposed to use the plastic in liquid, viscous or pasty form Condition by means of known roller application machines on the surface of a to be coated Apply the carrier material and then cold under pressure without further auxiliaries or cure hot. The use of roller application machines enables even application of the plastic, whereby it is not necessary to pretreat the surfaces to be coated, even if they have strong bumps.

According to a known method for glazing rough surfaces, a synthetic resin layer is applied to a high-gloss plate is applied, and then the plate to be coated is applied against the synthetic resin layer pressed. After the synthetic resin has hardened, the now coated plate is lifted off the high-gloss plate. By working in the Vacuum is intended to avoid the formation of air bubbles in the plastic layer.

A method for producing building boards with at least one smooth surface has also become known, according to which a paste-like device for coating the surfaces
a carrier material with plastic

Applicant:

Hans Vogt, Schloßberg, Wasserburger Str. 23

Named as inventor:
Hans Vogt, Schlossberg

Plastic layer applied to the material to be coated and then by means of a smooth, flexible and with an anti-adhesion agent, e.g. B. Fat> coated film against the surface to be coated is pressed and smoothed. After the plastic has solidified, the film is removed again. With this method there is the possibility that the applied, not yet hardened Plastic layer of dust particles. If air bubbles form in the plastic layer, they rise up to the surface of the plastic layer. The desired smooth surface of the coated material can then be adversely affected by the dust particles and air bubbles will.

The first object of the invention is an apparatus for the continuous coating of a continuously supplied carrier material with a supplied in a liquid, viscous or pasty state Plastic that is pressed and smoothed against the surface to be coated by a film will. The invention is based on a device for coating the surface of a continuously supplied carrier material with plastic, which is on the carrier material in liquid, viscous or pasty state is pressed and smoothed by means of a flexible film, which is then is withdrawn again. The invention consists in that in such a device, the flexible film is designed as a revolving, endless belt.

According to the proposal of the invention, the endless film strip lies over the carrier material to be coated and is applied by an applicator to the strand facing away from the carrier material A layer of plastic is applied to an endless film strip and then through one on the inside of the endless film strip against the surface of the carrier material to be coated if rolled on, dust particles can form

609 580/382

ν 1219 a

3 4

and air bubbles only attach an endless strip of film to the top-facing material.

surface of the art located on the upper run, on which the carrier material is facing

Deposit layer of fabric. As a result of the orbital movement of the strand, in turn, an anti-cohesive separating

of the endless film strip, this surface arrives medium and a plastic layer is applied,

the plastic layer in contact with the upper 5 To the. Accommodation of these two order

surface of the substrate to be coated, where devices and those downstream from them

To enable any unevenness of the plastic layer without drying devices, that's below

Meaning are. The endless film strip lying outside the carrier material in the end product in the

Surface of the plastic layer that is attached to the upper area of these application devices and drying

Strand of the film strip was applied and there smoothed io devices away from the carrier material downwards

has reached the angled without any damage,

coating body. Because of the under to be coated

There is no need to prevent the plastic layer from sticking to the carrier material

To avoid a circumferential foil belt, there is more space for an endless conveyor belt for that

if only a carrier material remains on the previously cleaned film strip, the individual

Anti-cohesive release agent sprayed on and pieces of the carrier material to be coated through

dries and only then does the plastic layer on- two feed rollers adjoining between

brought. . - - see that above and that below the carrier material

Before the film strip lying on the upper run of the endless film is conveyed.

The plastic layer applied to the tape is attached to the carrier 20 while avoiding air inclusions, individual pieces of the carrier material are fed through feed rollers, they are conveyed through a heating device with rollers that may be attached to the side surfaces of the individual there are several independently regulated pieces.

gelled heating zones and thereby against the um- Should both sides of the carrier material with two each

ambient air completed. 25 layers of plastic are provided behind

Above the lower run of the foil strip there are feed rollers for conveying the carrier

There is a heating device with possibly several materials and in front of the two endless foil strips

independently controllable heating zones and cleaning devices on both sides of the substrate

a cooling device for hardening for the between lines, preheating devices and application devices

the lower tram of the film strip and the carrier - 30 lines for each lower plastic layer.

material located plastic layer. seen.

While at the lower inlet of the endless film it expediently protrudes under the carrier material

tape the rigid or spring-mounted, pressure-bearing, endless · film tape further forward than the one above

"With or without an elastic covering, roll the roll of the endless film strip lying on the carrier material, and

Tensioning pulley takes over, if there is a 35 at the lower outlet, then over the protruding part of the lower

special tensioning roller provided, which arranged only a ren film strip support rollers, which a

has a small radius, as a result of which the detachment of the artificial tilting of the he-

fabric layer is facilitated by the foil tape. Prevent the backing material from

Looking at the thickness fluctuations of the workpieces, the endless

the tensioning pulley is expediently mounted in a pendulum fashion. 40 foil tape is made in the same way with a roller

Should two be superimposed on the carrier material to press the plastic layer against the carrier Layers of a plastic applied material, a heater, a cooling field and the application device is equipped with a cleaning device like that by means of the end any other device overlying the carrier material Applying a lower layer of plastic pre-45.

switched. The latter application device is the carrier material not even, but can A smoothing of the applied plastic curves becomes the inside of each endless film layer dispense with a film, since this roller is lying on the artificial tape and is adapted to the crumb layer the surface of the finished profile of the carrier material is not profiled. Since the profile duct forms. 5 ° roller no longer acts as a pulley for the endless one

If the device is to be used for applying the lower foil tape, a

Plastic layer is provided on the other side of the pulley to be special,

layered carrier material a suction line The endless film strip is made of plastic

opposite and a heating device after or preferably made of a highly polished one

are switched, each of the two 55 sheet steel is appropriate. If necessary, however, the foil tape can

Devices for applying a plastic layer on the side facing the plastic layer in

a special foil tape for the one to be coated in a known manner with an embossed

Assigned to the carrier material. Pattern. Be provided.

According to a proposal of the invention, between working with the device according to the invention the devices for applying the sub-60 allow the production of plastic frames and the upper plastic layer a device layer of any thickness without any reworking for feeding textile and glass fibers, with a high-gloss or matt-gloss surface. Paper and similar tapes or granular mate- A roughening of the surfaces is no longer necessary, rials are provided. The sprayed grain or other bumps are

If the carrier material is leveled on both sides with 65 den, so that plastics with poor

a plastic layer is to be provided, the flow properties are processed and solution

apart from the medium costs can be saved over the material to be coated. Is that enough

lying endless foil tape also below the amount to be applied to the pores or bumps

5 6

to fill the carrier material, so with the least - Fig. 1 the longitudinal section through a device possible application amount a closed top - for applying only one plastic layer,
area. However, this lower layer thickness means F i g. 2 shows the longitudinal section through a device z. B. with polyester lacquers at the same time lower breakage to apply two superimposed artificial danger and lower tensile stress, so that under 5 layers of fabric,

Coated on one side only or without fig. 3 shows the longitudinal section through a device

Additional costs compared to the previous process for coating both sides with a plastic

can be coated on both sides. layer,

A paraffin addition in polyester lacquers can be used for F i g. 4 a feed device is not required if the surface coating is on both sides, as the film allows for the coating and the non-abutting occupation,
a cover and thus an oxygen closure Fig.5 is a longitudinal section through the endless. As a result, with a smaller application film tape with a profiled pressure roller,
In the device according to FIG to rush; In addition, there is no port belt 3, the upper run of which rests on the table 5 with the addition of the abrasive through the paraffin. The delivered pieces of the carrier material are layered if they are re-ground. are first by a roller brush 4, which with

For many areas of application, the gloss is sufficient - a suction is connected, cleaned and then effejct and the smoothness created by the film itself. B. an infrared heater, aims will. Should the coated carrier material of the guided. Then the carrier material gets under Are exposed to the weather, so is a special endless, revolving film strip 7, z. B. from high-advantage of the process in that no grinding process brightly polished sheet steel. The lower run of the is required and thus notch effects in the foil strip moves in the same direction as Plastic layer can be avoided. But become the carrier material. The front tension pulley of the If particularly high demands are made, a film strip is formed by a roller 8 which Sanding and / or buffing, as well as a matt finish as detailed below, is used to roll the Firing with steel wool is easily possible. Plastic layer on the carrier material is used. the

Since only a low contact pressure is required when the rear tensioning roller 9 is rolled on and only has a small diameter, very porous, 30 cutters can also be coated with soft carrier materials in order to allow the coated pieces to be detached. To facilitate that of the carrier material.
Investment costs are relatively low for the same reason when that lifted from the carrier material. Nevertheless, a better bond between the plastic material is created by the film strip running through the cleaning device 10, a cohesive release agent is poured onto its upper run through the application layer and carrier material than when spraying and device 11. Since only the rollers apply a pressure which is then exerted in the drying zone 12, the entire device can be relatively dried. Subsequently, it will be easy to run on the top. Strand of the foil tape through a possibly with

The procurement and production of the foils is an application device 13 connected to an extraction system

relatively easy. Also the replacement of the 40 applied a plastic layer, which is then in

Foils can e.g. B. when changing paint or the like. B. with

follow. The foils allow a very good separating warm air operated heating device 14 gelled

nen at the end of the plant. Special sheet metal transport is

and sheet metal circulation systems are not required. The through the circulation of the endless foil strip

The working temperatures are z. B. when used 45 come into contact with the carrier material 2

of polyester lacquers in the range between 30 plastic layers is supported by the already mentioned,

and 60 ° C and practically do not lead to any drying-out roller 8, which serves as a tensioning roller, against the upper

tion for wood-based materials as a carrier material. surface of the carrier material and pressed on his

The device according to the invention enables the upper layer to be smoothed. Immediately above the lower run of the endless film strip, which is considerably accelerated at low labor costs, there is a low material throughput in a continuous, possibly weight-loaded heating section 15 and a work sequence and thus corresponds to the requirements of the cooling field 16. For the conveyor belt 3, an extensive mechanization of the fer - inclination device 17 provided,
activity. In particular, it is possible to use the method in FIG. 2 are also shown in FIG. 1 to couple with other continuous processes, 55 individual parts of the device shown are the same as e.g. B. used with upstream grinding lines or reference numerals. Any format cutting is used on the downstream grinding and buffing passes or roller 4, which is cleaned in the preheating zone 6 also with a continuously operating system for the heated carrier material 2. In many cases, this goal is achieved by application device 18 (e.g. spray gun, casting machine with constant or lower costs for the 60 machine, application rollers), which achieves coating material on the lower side; in addition, one of the carrier material, a suction device 19, can increase quality without increasing costs. can be opposed, a first plastic layer. The investment costs for the system are applied in the process, which is extraordinarily gelled in the subsequent heating device to achieve the advantages achieved. Under the roller brush 4 and low. 65 of the preheating zone 6, that is to say in front of the suction device 19 located below the wearer in the drawing, for example, a guide of the invention is shown. Arranged in a first conveyor belt 21, whose upper individual strand again rests on the table 5. After

Claims (29)

66i heating device 20 for the lower plastic layer and in front of the endless film strip? a device 22 is switched on for the application of the upper plastic layer, by means of which solid substances such as textile fibers, glass fibers, paper or similar tapes can be introduced between the two plastic layers. In the device according to FIG. 3, the endless film belt 23 lying under the carrier material has taken the place of the conveyor belt resting with its upper run on the table. The front part of this film strip is angled with respect to the carrier material, and an anti-cohesive agent is fed to the upper run of this angled part by the application device 24, which is then dried in the drying zone 25. Then a plastic layer is applied to the upper run of the film strip by the application device 26, which is brought into a paste-like state in the heating device 27. - ... The carrier material 2 is pushed continuously in abutting occupancy by the two feed rollers 28 between the lower run of the endless film strip 3 above and the upper run of the endless film strip 23 below. The two rollers 8 and 29 press the on the film strips lying plastic layers against the upper and lower surface of the carrier material to be coated. The plastic layers' located on the top and bottom of the carrier material then pass through the heating section 15 and 15 'and the cooling fields 16 and 16'. The deflection roller 30 of the downwardly angled part of the lower foil strip 23 cooperates with the cleaning device 31 of the lower foil strip. At the other end of the film strip, two deflection rollers 32 of only a small diameter are provided. The lower, foil strip protrudes with its end opposite the angled part over the upper foil strip. Above this protruding part, support rollers 33 are arranged which prevent the already coated carrier material lying on the protruding foil strip part from tilting. Just like the foil tape on top? is. The film strip 23 lying below is also equipped with a heating section 15 'and a cooling field 16', which are located near the upper run of the lower endless film strip. In order to be able to provide the carrier material with two plastic layers on each side, cleaning devices 4, 4 ', preheating zones 6, 6' and a double-acting output device 34 for the two lower plastic layers are provided behind the feed rollers 28 on both sides of the carrier material. The plastic layer lying on top of the carrier material is heated by the preheating zone 20, the plastic layer lying underneath the carrier material is heated by the preheating zone 27 of the plastic applied to the lower film strip 23. ~ The fig. 4 shows how, when the carrier material is coated on both sides with plastic and thus in the absence of a conveyor belt for the carrier material, the individual pieces 2 of the carrier material are conveyed by rotating drive rollers 35, which rest against the side edges of the individual carrier material pieces, when the coating is not abutted. If 'the roller pressing the plastic layer onto' the carrier material is curved in adaptation to a curvature of the carrier material, according to FIG. The deflecting rollers 37, 38 and 39 have only a small diameter, so that the ends of the foil strip run obliquely to the carrier material to be coated. • ■■ Patent claims: 1. Device for coating the surface of a continuously fed carrier material with plastic, which is liquid, viscous or pasty on the carrier material State by means of a flexible FoHe is pressed and smoothed, which is then is withdrawn again, thereby identifying . draws that the flexible film (7) as um- .. running, endless belt is formed. 2. Device according to claim 1, characterized in that the endless film strip (7) is above the carrier material (2) to be coated. 3. Apparatus according to claim 2, characterized by an application device (13) which on the strand of the endless film strip (7) facing away from the carrier material is a plastic layer applies. 4. Apparatus according to claim 3, characterized by one on the inside of the endless Foil tape (7) attached roller (8), which is caused by the rotational movement of the foil tape between the lower run of the foil tape and the underlying carrier material (2) conveyed plastic layer against the one to be coated The surface of the carrier material is rolled and smoothed. . 5. Device according to claims 3 and 4, characterized by one in front of the application device (13) the plastic layer lying application device (11) for a cohesion-hostile . Lich release agent. 6. Apparatus according to claim 5, characterized by one of the application device (11) for the anti-cohesive release agent downstream drying device (12) for the release agent. 7. Device according to claims 3 to 6, characterized by a heating device (14) downstream of the application device (13) for the plastic layer, in which the plastic applied to the endless film strip (7) is gelled. 8. Device according to claims 3 to 7, characterized by a cover (10 to 14), the plastic applied to the endless film strip (7) until before it is applied on the carrier material (2) closes off from the ambient air. 9. Device according to claims 3 to 8, characterized by a heating section (15) with possibly several independently controllable heating zones above the lower run . of the endless film strip (7) for curing the ■ applied plastic layer. 10. Device according to claims 3 to 9, characterized by a cooling field (16) above the outgoing end of the lower run of the endless film strip. 11. Device according to claims 3 to 10, characterized by a cleaning device ■ device (10) for the endless film strip (7) at the beginning of its upper run before the application device (11) for the anti-cohesive release agent. 12. The device according to claim 4, characterized in that the pressure roller (8) for the Plastic layer serves as a tensioning roller for the endless film strip (7). 13. The device according to claim 12, characterized in that the other tensioning roller (9) has a particularly small diameter and is mounted in a pendulum manner. 14. Device according to claims 1 to 13, characterized in that the device for applying a plastic layer to a carrier material with the help of a circumferential, ao endless film strip (7) any other device for applying a lower plastic layer is connected upstream (Fig. 2). 15. The device according to claim 14, characterized in that the device (18) for as Application of the lower plastic layer on the other side of the carrier material to be coated (2) a suction device (19) is opposite and a heating device (20) is connected downstream is. 16. Device according to claims 14 and 15, characterized in that each of the two devices for applying the lower and the second plastic layer a special conveyor belt (21, 3) for the carrier material to be coated (2) is assigned. 17. Device according to claims 14 to 16, characterized by a device (22) for the supply of textile and glass fibers, paper or similar tapes and / or granular materials after applying the lower and before applying the second plastic layer to the carrier material. 18. The device according to claim 2, characterized by a further endless film strip (23), which lies under the carrier material (2) to be coated (FIG. 3). 19. The device according to claim 18, characterized by two application devices (24, 26), the one on the strand facing the carrier material of the strand lying under the carrier material endless film strip (23) a cohesive release agent and a plastic layer Instruct. 20. Device according to claims 18 and 19, characterized in that the application devices (24, 26) for the release agent and the plastic layer on the film strip (23) lying under the carrier material one each Drying device (25, 27) is switched on. 21. Device according to claims 18 to 20, characterized in that the endless film strip (23) lying under the carrier material in the area of the application devices (24, 26) for the release agent and the plastic layer and of the drying devices (25, 27) is angled downwards away from the carrier material (2). 22. Device according to claims 18 to 21, characterized by two feed rollers (28) showing the individual pieces (2) of the carrier material to be coated in abutting assignment between the film strip (7, 23) lying above and below the carrier material. 23. Device according to claims 18 to 21, characterized by perpendicular, on the side edges the pieces (2) of the carrier material adjoining feed rollers (35) for the carrier material if the occupancy is not connected (Fig. 4). 24. Device according to claims 18 to 23, characterized in that behind the feed rollers (28) for the carrier material (2) and cleaning devices in front of the two endless film strips (7, 23) on both sides of the carrier material (4,4 '), preheating devices (6,6') and application devices (34) for one lower each Plastic layer are provided. 25. Device according to claims 18 to 24, characterized in that the endless film strip (23) lying under the carrier material at the output end of the plastic-covered carrier material protrudes further than that above the Support material lying endless film strip (7) and that over the protruding part of the lower Foil tape support rollers (33) are arranged. 26. Device according to claims 18 to 25, characterized in that the endless film strip (23) lying under the carrier material in the same way with a roller (29) for pressing the plastic layer onto the carrier material, a heating device (15 '), a cooling field (16') and a cleaning device (31) is equipped like the endless film strip lying over the carrier material. 27. Device according to claims 4, 12 and 26, characterized in that the on the Inside of each endless film strip lying roller (36) for pressing and smoothing the Plastic layer on the carrier material in adaptation to any existing curvature of the Support material is profiled, with a special, the profile roller (36) adjacent deflection roller (37) is provided for the endless film strip (Fig. 5). 28. Device according to claims 1 to 27, characterized in that the endless Foil tape (7, 23) consists of a highly polished sheet steel. 29. The device according to claim 28, characterized in that the endless film strip the side facing the plastic layer in a known manner with an embossed Pattern is provided. Documents considered: German Patent No. 844 661; German interpretative document No. 1 078 906. For this purpose 2 sheets of drawings 609 580/382 6. 66 © Bundesdruckerei Berlin