DE2011184A1 - Method and device for the continuous production of a surface covering made of plastic at the point of use - Google Patents

Description

■ PATENT LAWYERS

be, ing. H. NEGENDANK · bipl.-ing H. BLATJCK · dipx-fhys. W. SCHMITZ

HAMBlTEG- MUNICH ZtTSTELLTJNG-SANSCBITIFT: HAMBTJRO 36 ■ NICE WA LL · 4kX

TEL. 3β 74 28 AND «β 41 15 TEI-EGH. NEGATIVE HAMBUBG

MUNICH 15 MOZARTSTR. SS

TEL. 3 38 05 80

TELEGR. NEGEDAPATENT MUNICH

, 9 ο March 1970

Montecatini Edison SpA,
Milan, Foro Buonaparte 31
( Italy )

Method and device for the continuous production of a surface covering made of plastic at the place of use.

The invention relates to a method for producing a continuous plastic insert at the place of use Process is particularly suitable for the production of large surface coverings made of plastic using commercially available foils. Furthermore, the invention is on .ein for implementation this method suitable device directed.

With the increasing use of sheets and foils made of plastic e.g. made of polyvinyl chloride, polyethylene etc. to cover large areas of the earth or large areas of buildings it is necessary to connect different foils or webs of a certain width with one another (those with commercially available Lanes can be up to 4 meters) to cover larger areas To obtain expansion that is essentially that to be covered Area corresponds to.

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Ei · - is an area of application that has only recently been developed making a soil impermeable through welded Kin ststoffolien or webs for the purpose of training artificial Lakes or basins. It is known that several coverings or water-impermeable protective blankets are used for the production of vcn Strips or webs of the film of a limited width each have to be connected to one another, each having a width vcn up to 4 meters. The connection can be made by various known welding methods such as e.g. by the action of heat, by electrical or electronic means, etc., or by gluing.

It is also known to use the protective deodorants mentioned above large width in a factory by welding or gluing by hand or by various known methods machined by the plastic strips necessary to achieve the covering of the desired dimensions put together and the protective cover obtained in this way is then transported to the place to be covered, ar. which it is spread over the surface to be covered. It is obvious that such a system is both practical as well as significant disadvantages from an economic point of view having. The dimensions of the blanket made in the factory make it very difficult to transport it to the place of use and expensive, and quite difficult to use. In addition, this procedure is only possible if the areas to be covered Surfaces have a smaller size and therefore the dimensions

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not too big according to the protective blanket made in the factory are.

Another known system for making coverings Areas of greater or lesser extent consists in that. the film webs used to cover the surface, or in the manner described above in.der factory made protective blankets of larger dimensions side by side towards the covering areas applied and a certain number of

Tracks or strips are connected to one another and finally the adjacent and overlapping edges of the strips and the protective covers prepared in this way are welded to one another at the place of use. The connection is made by welding or gluing by hand or by machine using methods known per se. When machines are used for the preparation of the compound, they move on the spread strips or blankets of time, wherein they must be used on flat and smooth working surfaces, for which purpose it is necessary to below '% of the plastic films or sheets in the zones in which they have to be connected, for example in a type of planking

■. /
in the form of wooden boards, which are removed after the connection has been made. Also this connection system at point of use is both manually and using mechanical means not very practical, as well as costly and very time consuming in its implementation.

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The object of the invention is therefore to provide a method for the production of protective blankets of large dimensions at the point of use, the method of the disadvantages the previously known systems should be free. In particular, a method is to be created that allows the production a cover or a protective blanket in place, as well as practical, simple, inexpensive and quick in its execution and the covering of surfaces size and shape is permitted. Furthermore, a device for joining the films or foils and for continuously producing a covering on any surface will.

In order to solve the problem posed, a method which is evident to the person skilled in the art in detail from the description below is used proposed for the continuous production of a surface covering from plastic foils or films at the place of use, which is characterized according to the invention that on the to ^ Covering surface laid a sheet of plastic film, then taken up a longitudinal edge of the plastic film, on one along placed on the surface to be covered and parallel to the moving surface of the hand and the edge on this movable surface Surface is connected to the longitudinal edge of another plastic film, which at the same time next to the one already laid out Plastic film is spread on the surface to be covered, and that in this way adjoining webs simultaneously welded together and spread out until

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the surface is completely covered. ,

According to the invention is also a for performing the Proposed device serving the method described above, which consists essentially of a frame which carries a surface which essentially the holding plane for welding the plastic sheets together, a post, which is an integral part of the frame and in above way carries another surface. which in essentially represents the pressure area for the connection process, wherein the protruding surface of the aforementioned bearing surface is superimposed, devices for connecting, in particular Welding of the webs of plastic film, devices located in the vicinity of these surfaces, devices for Guiding and inserting the edge of the already on the to be covered Surface spread plastic film and the edge of the Next to the already laid out film, put the film to be spread out the two aforementioned surfaces, devices for Receipt of the plastic tape to be laid out on the frame in the form of a spool and finally from drive and guide devices to move the machine along the surface to be covered.

The method and the device according to the invention are suitable especially for the execution of waterproof coverings of the Soil for the construction of artificial lakes or basins. In these cases . - 6 -

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known plastic films such as 25 .B. the end Polyvinyl chloride, polyethylene, synthetic rubber mats, etc. are used.

An exemplary embodiment serving only to illustrate the invention is explained in more detail with reference to the drawings. In the drawings are:

Fig. 1 is an elevation of the device according to the invention from

front,

Fig. 2 is a side elevation of the device of Fig. 1; Fig. 3 is a schematic representation of the path for the

Plastic film or foil during processing

of the device according to the invention, Fig. 4 is a schematic representation of a modified one

Embodiment of part of the device, Fig. 5 is a schematic plan view of the machine

of Fig. 1, and

6 shows a section along the line 6-6 in FIG. 5, which has been rotated through 90 °.

With reference to the above figures, the device consists of a frame 1 (Fig. 1) which on four Wheels 2 is mounted, all of which are variable via a differential gear by a motor 3 arranged on the frame 1 Speed can be driven. The device described is therefore self-propelled and can move along the road to be covered Surface by means of an automatic guidance system

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move or be controlled by a driver who is on the machine itself. Depending on the respective requirements and in particular on the nature of the surface on which the machine is to be used, the machine can also have caterpillars or a towing or conveyor system 26 instead of the wheels, which enables the machine to move even over very uneven surfaces and particularly permitted on slopes of more than 100 %.

So it is obvious that the machine is very well suited for creating artificial lakes and canals. The movement is transmitted from the engine 3 through a transmission gear 4 to the front and rear differential gears 27 (FIG. 5). On the frame 1 four rollers 5 and 5 'are mounted ₉ whose axes are essentially in the same plane _o these. Malts essentially form the support surfaces for connecting the lengths of plastic film. In particular, the two rollers 5 form the surface on which the edges of adjacent strips of plastic film are connected to one another in the manner shown below, while the rollers 5 '(FIG. 2) serve in particular as guides for these films.

Both rollers 5 are by means of known guide devices such as ball bearings or corresponding devices on the Ends of their axes on a vertical post 6 or mounted on a protruding part 7, the post 6 and the part

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7 are firmly connected to the frame 1. The two reels 5 ' are stored in a corresponding manner between the protruding part 7 and another part 8, which is also rigid with

1
the frame / is connected. The rollers 5 ^f have a shorter length than the rollers 5 (Pig 5) as a result of their Pührungsaufgäbe.Two rollers 9 are mounted on the post 6 butting against one another and overlay the two rollers 5, the axes of the two rollers 9 being essentially the same Lie level and the rollers in connection with the rollers 5 form the pressure surface for connecting the plastic webs.

The two rollers 9 are on the post 6 by known slide bearing systems stored. The transmission gear 4, which the driving force on the towing or conveyor system, the wheels 2 or corresponding chains transmits and forms the drive for the machine over the surface to be covered, transmits the driving force through a synchronization device 10 also to the rollers 5, 5 'and 9 by means of a known one Belt, chain or gear drive or a corresponding system. In Fig. 6, the gear system is shown, which connects the rollers 5 with the rollers 9.

Thus, all of the aforementioned rollers are preferably driven Rollers and the surfaces which, in the manner described above, are essentially the support and pressure surfaces Form for connecting the plastic webs, are preferably movable to unwind the film from the drum

and joining the edge of the film to the edge of an already laid out film web to facilitate.

Depending on the particular requirements, some rollers can also be designed to run freely. According to one Modified embodiment of the invention can be the above The support and pressure surfaces described consist of two revolving endless belts 11 and 12 (FIG. 4). The reels 5, 5 ' and 9} as well as the belts 11 and 12 are preferably with Rubber coated.

The synchronization device 10 allows the speed of movement of the machine along the surface to be covered appropriately with the connection speed the plastic webs between the rollers 5 and 9 to synchronize. The reference number 13 (in Fig. 1) denotes a system, preferably with an automatic control, for example a rack and pinion system driven by an electric motor for raising or lowering the rollers 9 with respect to the rollers 5 according to the respective requirements. . The reels 9 are supported above on the post 6 by means of a plate 14 which is displaceable in suitable guides which are provided on the post.

On this post 6, a free-running roller 15 is also mounted in the above manner, which carries the drum, wherein free-running guide rollers 16 and below this roller 17 are located. On the opposite side of the post 6

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the rollers 9, 15, 16 and 17 are stored in a plate 18 by known storage systems, the rollers together with the plate 18 forming a single system which is supported on the post 6 in the above manner.

Of course, the two rollers 9 on the plate 18 are also mounted on a plate 19 which, with respect to the plate 18 is displaceable in the axial direction by being displaceable on corresponding guides and in this way the lifting or lowering the rollers.

The reference numeral 20 in Fig. 1 schematically denotes the Coil of plastic film. With the plate 18 are also suitable devices for joining the edges of adjacent sheets. In the drawings, these devices exist from two hot air blowpipes 21 and 21 '. Leave it however, other welding devices such as hot tools, electrically heated tools or electronic tools can also be used Tools, and finally suitable tools for producing adhesive connections can also be used.

The blowpipes 21 and 21 * used for welding are located in the vicinity of the outer, protruding zones of the rollers 9 and are, as shown in FIG. 2, laterally to the Rollers 9 arranged on both sides. The blowpipes are also connected to the plate 18 by suitable blowpipe supports tied together. The reference number 22 denotes a hot air supply

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system for feeding the glass tubes used for welding.

As indicated in the drawings, the axes are the Y / alzen arranged inclined to the already laid out web in order to take up the edge of the already laid out plastic web make it easier if this is welded to the edge of the plastic sheet wound as a spool on the machine itself should be -which at the same time in addition to the already laid out Railway on the one to be covered. Surface is laid out »The Reference numerals 23 and 23 '(in FIGS. 1 and 2) designate bearings for that formed by the folds 9, 15, 16 and 17 protruding roller system, with the carrier arranged laterally to the rollers 5 'and through the arms 24 and 24' with the plate 18 are connected (see Pig. 1). The carriers 23 are mediated a known screw system or a telescopic system designed to be removable.

The operation of the machine is as follows: The machine moves over the surface to be covered, for example the soil to be made waterproof, on which an artificial Lake is to arise, and lays a first sheet of plastic film over its length, which automatically from the Coil. 20 is unwound. In this state the machine moves in the direction indicated by arrow A of the pig. 2 direction shown «, The film unwound from the spool 20 follows that in Pig. 3 by-the-dashed line represented path 25 and is applied to the surface to be covered in the direction of the

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Arrow b filed (Fig. 3). The film unwinds as a result of the tensile effect exerted by the rollers 9 and 5. For this process, the carrier 23 ', which is located on the side of the rollers 5 ¹ on which the film is dispensed, has previously been removed in order to allow the dispensing of the film to be spread. During this first operation, the blowpipes used for feeding do not come into effect, and the

IP machine was previously loaded with a coil 20, which from consists of a strip of plastic film, the length of which corresponds approximately to the width of the ground to be covered. to At the end of the first work process, the machine is moved a distance equal to the width of the plastic sheet that has already been laid out corresponds, and then loaded with a new spool 20. The carrier 23 'is reinstalled while the carrier 23 is removed will. Then, from the side of the carrier 23 ', the edge of the plastic sheet which has already been spread out on the surface is over

Qf the rollers 5 and 5 ^{1 are} guided, the machine is moved parallel to this longitudinal edge in the direction indicated by the arrow B (see FIG. 2), and by operating the blowpipe 21 'serving for feeding (FIG. 2) the longitudinal edge becomes of the already spread out plastic film is welded to the edge of the plastic film running off the spool 20, which follows the path 25 'shown in Fig. 3 by a solid line and in the direction of arrow a (Fig. 3) on the surface to be covered next to the already spread plastic sheet is deposited. .,

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At the end of this second pass, the previously executed Operations repeated, the direction of port movement of the machine is reversed, i.e. it is again in the direction of arrow A (Fig. 2) is moved forward, the carrier 23 again inserted, and the carrier 23 'is removed. In this operation the blowpipe 21 used for welding is put into operation. The operations described above will be then repeated in the manner described above until the surface of the earth is completely covered.

The advantages of the invention are readily apparent from the foregoing description, but they can be broken down as follows sum up:

- The possibility of covering extensive surfaces with plastic film through the automatic and simultaneous Laying down and the automatic joining of the corresponding edges of the plastic films.

- Speed and low cost of the work, etc.

The invention described above can of course be modified or further develop without departing from the scope of the invention.

- patent claims -

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Claims (11)

- 14 patent claims: (Ί ·; Process for the continuous production of a continuous Surface covering made of a plastic film at the place of use, characterized in that on the one to be covered Surface laid a web of plastic film, then taken a longitudinal edge of the plastic film, on one along the surface to be covered and placed parallel to the edge moving movable surface and the edge on this movable surface is connected to the longitudinal edge of another plastic sheet, which is at the same time next to the already laid out plastic film is spread on the surface to be covered, and that in this way contiguous Sheets are welded together and spread out at the same time until the surface is completely covered. 2. Device for performing the method according to claim 1, characterized in that the device consists essentially of a frame (1) which carries a surface (5) which essentially forms the holding plane for welding the plastic sheets together, a post ( 6), which is an integral part of the frame and in the above way carries a further surface (9), which essentially represents the pressure surface for the connection process, whereby the projecting surface (9) is superimposed on the aforementioned support surface (5), devices ( 21, 21 ') for connecting, especially - 15 009840/1891 namely special welding of the webs of plastic film / devices located in the vicinity of these surfaces, devices (5 ¹ ) for guiding and inserting the edge of the plastic film already spread out on the surface to be covered and the .Rarides of the film to be spread out next to the already laid out film between the two aforementioned surfaces, devices for receiving the plastic tape to be laid on the frame in the form of a reel (20) and finally drive and guide devices (26) for moving the machine along the surface to be covered. 3. Device according to claim 2, characterized in that that the surface, which forms the supporting surface used to connect the plastic webs, consists of at least one the frame of the machine is rotatably mounted roller (5). M. device according to claim 2, characterized in that that the surface, which forms the supporting surface used to connect the plastic webs, consists of at least one endless belts (11, 12) rotatably mounted on the frame of the machine. 5. Device according to one of the preceding claims 2-4, characterized in that the surface which substantially forms the printing plane for connecting the plastic films, protruding from at least one of the frame of the machine - 16 '009840/1891 - 16 mounted rotating roller (9) consists. 6. Device according to one of the preceding claims 2-4, characterized in that the surface which is substantially forms the printing plane for connecting the plastic films, projecting from at least one on the frame of the machine stored endless belts (11, 12). 7. Device according to one of claims 2-6, characterized in that that the surface, which essentially forms the printing plane for connecting the plastic films, with respect to the surface, which essentially forms the support plane for the connection, is movably arranged. 8. Device according to claims 2-7 » characterized in that the device used for connecting the plastic webs consists of at least one welding blowpipe (21, 21 ') which is preferably operated with hot air. 9. Device according to one of claims 2-8, characterized in that the Pührungs- and Einführvorrichtungen from partially free-running and partially driven orphans (16, 17; 5, 9) which are mounted on the frame of the device. 10. Device according to one of claims 2-4, characterized in that that the to hold the in the form of a coil - 17 0098A0 / 1891 ■ " ¹⁷ " through the frame stored plastic film from a to the Frame freely mounted roller (20) consists. 11. Device according to one of the preceding claims 2-10, characterized in that the port movement of the machine Serving drive device (3> M) also to drive the to Connect the plastic films serving support and printing planes is used. 009840/1891