DE2740291A1 - Thermoplastic sheet or plate bonding to cement contg. articles - using heat and pressure, used in roof or wall construction - Google Patents

Abstract

The process is for joining in sheet-shaped or plate-shaped members, consisting of thermoplastic material, (pref polyolefins) with formed parts contg binder, (pref cement) and consisting of e.g. concrete, fibrous cement or asbestos cement etc. pref. for roof and wall elements. The member or members consisting of thermoplastic, bitumen-contg plastics material is or are fused directly to the formed part at one side by applying heat and opt press. The latter is heated, at least at the surface of the joining area, pref to 100 degrees C - 200 degrees C. Then the member of plastics material is placed onto and opt pressed against the heated area, followed by cooling.

Description

The invention relates to a method for connecting

special film or plate-shaped bodies made of thermoplastic in particular Plastic, preferably made of polyolefins, in particular with cement as a binding agent containing molded parts made of, for example, concrete, fiber or asbestos cement or the like, preferably for roof and wall elements.

The invention also relates to devices for performing this Expiration.

Both in building construction and civil engineering there is often the need to Body made of thermoplastic material not concrete, fiber cement or the like to connect. For example, aiii must consist of many fibers Roof panels with chimney connection parts or corner pieces made of thermoplastic material exist, be connected. In civil engineering, for example, the plastics must to seal Sc1wimr.i or water basins with their walls. So far, these plastic bodies or foils are mainly used by welding, Clamp, cold or hot glue together and by cold or hot glue with the Molded parts made of concrete, fiber cement or the like connected. In the latter case It is often preferred to use hot bitumen to cover the entire surface with polyolefin foils on which consist of concrete, fiber cement or the like, the substrate is to be glued and to weld the overlaps. Apply the adhesive to the components requires a separate operation, and so will the cost of the connection still more expensive for the glue due to dtii effort.

I) the invention is based on the object of avoiding these disadvantages, and to create a method which allows a body made of, in particular, thermoplastic Plastic directly, i.e. without using an adhesive with a molded part To join concrete, fiber cement or the like.

According to the invention, this is done in a method of the type mentioned at the outset Kind achieved in that the or those made of thermoplastic plastic in particular standing body with, for example, concrete, fiber or asbestos cement or the like existing molded part at least on one side of the same predominantly Connected solely by the application of heat and possibly pressure, in particular melted on is or will be, the latter permissible inilnst on the surface of the junction preferably heated to a temperature of about 100 ° C to 200 ° C, and on the heated point then tler body made of thermoplastic in particular is applied and, if necessary, pressed, whereupon the connection to room temperature is cooled.

After it had cooled down, this came about without using a glue Connection between the body made of plastic and the molded part made of concrete, fiber cement or the like solid, durable and water-resistant. This through the application of heat respectively.

The connection made by melting is also much cheaper and more durable than the connection made using an adhesive. Of the The cooling process can be active or passive, i.e. the connection can E.g. cooled by means of a cooling medium or simply left to cool down at ambient temperature will.

In the embodiment of the Lrfindjng it is provided that the core is made of plastic before or after placing on the molded parts, especially during the pressure application, is heated.

There is an advantageous further development of the method according to the invention also in it, yes the body made of plastic in the cold, preferably room temperature exhibiting state is placed on the molded parts.

It has also proven to be useful for the method according to the invention It has been proven that the plastic body is essentially made of bituminous polyolefin consists.

The plastic body can also consist of an olefin, in particular Ethylene copolymer, blended with bitumen, or made of polyisobutylene, blended with bitumen.

It is also possible that the plastic body with at least one Linlage, e.g. synthetic or mineral fibers such as glass fibers, reinforced is or that the plastic body at least on one side with a coating or film, for example made of polytetrafluoroethylene, is provided.

The quality of the connection can also be improved by that the plastic body under a pressure of about 10 to 60 kp / cm2 on the off Concrete, fiber cement or the like existing molding is pressed.

For connecting bodies made of bituminous polyolefins with the Molded parts made of concrete, fiber cement or the like, it has proven to be useful that the surface of the joint on the concrete, fiber cement or the like bsestanding body is heated to a temperature of about 160 ° C. In a preferred Execution of the method according to the invention is finally provided that the The molded parts to be connected are provided with perforations near the connection point, and that on two opposite sides of the same at least one Plastic body is placed, of which at least one is on the connection point extends, whereupon the plastic body by the application of heat and possibly pressure are brought into contact with one another and connected in the perforations.

For the continuous connection of a web-shaped body made of thermoplastic Plastic with a molded part made of concrete, fiber cement or the like suggests the Invention a device with at least one pressure tool, in particular one Pressure stamp with cover age, for pressing the plastic -body (s) on the molded part made of concrete, fiber cement or the like, the d a d u r c h g e k e n n n z e i c h n e t is that the pressure stamp has at least one heating device for heating the molded part made of concrete, fiber cement or the like is upstream.

In another embodiment of a device according to the invention, which can also be used in combination with the above device, it is provided that the pressure tool itself is designed to be heatable, in particular is provided with an electric heater.

The invention is explained below with reference to the drawing, in which an exemplary embodiment a device according to the invention for performing the method according to the invention is shown, described in more detail.

The figures show: FIG. 1 a schematic view of one according to the invention Device, Figure 2 shows a section through the product formed with this device, and FIG. 3 shows a section through another according to the method according to the invention produced certificate.

The device shown is used to melt a bituminous Polyolefin film on existing asbestos cement roof panels for the purpose of forming a moveable ridge cap or a moveable kehlstein. Such movable ridge caps or Kehlsteine are used to adapt to different roof pitches and exist of two roof panels, which are interposed by a flexible intermediate piece in the form of a plastic film are closely connected to one another, so that these Ridge caps or

Deer stones are wetted to the roof inclinations that occur in each case can.

The device comprises a roller guide 1 for the asbestos cement panels 2, a ileizeinrichtung 3 for the asbestos cement panels 2 and a printing tool with a Drucksteirpel 4 for pressing a bituminous Powlefin film 5 on the asbestos cement panels 2 including the counter bearing 6. The heating device 3 is here the Pressure stamp 4 connected upstream. The heating device 3 can be an electrical resistance heater, a steam heater, etc.

be. The film 5 is supplied by a delivery device 7 and Using guide rollers 8, 9 at a distance above the Ashestzen.entplatte 2. The film 5 is cut to the desired format by means of cutting knives 14. Another roller guide 10 is used to transport the finished product away. The pressure stamp 4 and the counter holder 6 can also be equipped with electrical heating devices 12,13 be provided.

In order to carry out the method according to the invention, the asbestos cement board 2 with the heating device 3 to a temperature between 120 and 1600C with a Heated tolerance of + 50C.

The optimum temperature depends on the softening point of the film, the can fluctuate. The respective temperature must be adapted to the film.

Before the melting point, dust and dirt particles are removed from the melting point cleaned. The film 5 is then applied to the asbestos cement panels by means of the pressure stamp 4 2 pressed on and melted in the process. It is advantageous here between the To arrange the plunger 4 and the film 5, a Teflon or glass fiber fabric, so that the film 5 does not stick to the printing tool 4 or is easily detached from it can be.

The finished product is then shown in FIG.

It is this the finished ridge cap that is made up of two spaced apart arranged and connected to one another by means of the film 5 asbestos cement panels 2 exists. Those places where the film 5 fused to the asbestos cement panels 2 are denoted by 11.

In the laboratory the poisons of the compound can be determined as follows; The test specimen is placed in water at 20 ° C for 4 hours and then for 20 hours at 200 ° C stored. The cycle is repeated 20 times.

The connection between Kuiiststoffoli e and Asbestoszemntnlatte is better with high pressure and low pressure than with high jerks and lower pressures Temperatures.

The asbestos cement panels may generally only be used at the age of 2 () to be used up to 28 days, because the cement would otherwise be heated to 1500C can be harmed. The plates shouldn't be too old either. The heating should only take place slowly.

In the exemplary embodiment according to FIG. 3, the molded parts to be connected are 20,21 near the junction with holes 22,23 verseheii, which are preferably in the made of fiber or asbestos cement, plate-shaped molded parts by punching were formed. On the one hand, the molded parts 20, 21 are the connection point of one bridging plastic body 24 connected to one another in the form of a film, whereas on the sides of the molded parts 20, 21 opposite the plastic body 24, respectively only strip-shaped plastic parts 25,26 are arranged, each of which in each case only extends over the Pandbereic'i of one of the molded parts 2X3,21.

Due to the application of heat and pressure, the plastic parts are 24, 25, 26 melted onto the molded parts and through the perforations 22, 23 together been brought into contact as well as connected. Because of the application of heat the plastic parts plasticized so that they penetrated into the perforations, whereby the plastic parts were welded together in the holes. So it becomes created a connection extending through the perforations. Instead of the two Plastic parts 25, 26 could of course also have a common plastic body can be used which, like the plastic body 24, spans the connection point.

Primarily only such thermoplastic ones are suitable for the present purpose Plastics that are absolutely resistant to saponification.

Tests have shown that films made of pure polyethylene or polyisobutylene can be melted on the surface of asbestos cement panels that the But liability is not always permanent enough. If, on the other hand, an olefin copolymer if it is mixed with bitumen, the adhesion can be regarded as particularly good will.

The films used also know to improve the isthetic Be laminated on one side with a thin, colored film. It is also It is possible to use foils with a layer of glass fiber fleece on one side for reinforcement hook.

The advantage of the fusion over the gluing is particularly with small areas, e.g. 8. Execution of a chimney seal, movable connection between asbestos cement plates to form ridges, valleys and corner pieces.

The invention is not restricted to the use of mold parts, which contain cement as a binding agent. Rather, it is also based on molded parts that another hydraulic binder, such as lime, or a synthetic resin as a binder included, such as

Artificial concrete, applicable.

The molded parts themselves can have any shape, d.li.

in the form of plates, tubes, angle or corner pieces, profiles, etc.

Claims (13)

Method and device for connecting plastic bodies with Binder-containing molded parts made of, for example, concrete or Ze @ ent P A T E N T A N S P R Ü C Process for joining, in particular, foil or plate-shaped bodies made of thermoplastic material, preferably from polyolefins, molded parts containing binders, in particular Zeent for example concrete, fiber or asbestos cement or the like ic½en, preferably for Roof and wall elements, characterized, the or which consists of thermoplastic, bituminous plastic Body with the for example made of concrete, fiber or. Asbestos cement or the like existing molded part at least on one side of the same predominantly alone The application of heat and, if necessary, pressure is or will be melted directly, the latter preferably at least on the surface of the joint heated to a temperature of about 1000C to 2000C and on the heated area then the body made of plastic is placed and, if necessary, pressed on, whereupon after this connection has been established, it is cooled to room temperature. 2. The method according to claim 1, characterized in that for melting the body made of plastic before or after being placed on the molded parts, in particular during the application of pressure. 3. The method riacll claim 1 or 2, characterized gekennzeic1: net that the body made of plastic in the old, preferably t ', u, -itemperature exhibiting Condition is placed directly on the heated molded parts and melted. 4. The method according to any one of claims 1 I) is 3, characterized by ekr, that the plastic body consists essentially of 1'itu ': "containing polyolefin. 5. The method according to claim 4, characterized in that the Plastic body made from an olefin, in particular ethylene copolymer, blended with bitumen. 6. The method according to claim 4, characterized in that the plastic body is made of polyisobutylene, blended with bitumen. 7. The method according to any one of claims 1 to 6, characterized in that: that the plastic body with at least one binlage, in particular synthetic or mineral fibers such as glass fibers. 8. The method according to any one of claims 1 to 7, characterized in that that the plastic body at least on one side with a coating or Foil, in particular made of polytetrafluoroethylene, is provided. 9. The method according to any one of claims 1 to 8, characterized in that that the plastic body in a known manner under a pressure of about 10 up to 60 kp / cm2 on the molded part made of concrete, fiber cement or the like is pressed. 10. The method according to any one of claims 1 to 9, characterized in that that the surface of the joint on the concrete, fiber @@ ment or the like existing body in a known manner to a temperature of about 1600C is heated. 11. The method according to any one of claims 1 to ir ', in particular articulated connection of two spaced-apart molded parts, d a d u r c h g e k e n n n z e i c h n e t that molded parts to be connected near the connection point be provided with holes, and that on two opposite sides dersalben at least one plastic body is placed, of which at least one extends over the junction of the molded parts, whereupon the @ arm and, if necessary, applying pressure to the plastic bodies in the perforations with one another be brought into contact and connected. 12. The method according to any one of claims 1 to 11, d a d u r c h g e k e n n - indicates that first the molded parts are heated, then the cold @ plastic body is applied, and then with simultaneous heating by applying pressure is melted. 13. Device for performing the method according to one of the claims 1 to 12, with at least one, optionally heatable printing tool, in particular a pressure stamp illit counter holder for. Pressing the plastic body (s) on the molded part made of concrete, fiber cement or the like, therefore n n z e i c h n e t that the printing tool (4, 6) has at least one heating device (3) for heating the molded part made of concrete, fiber cement or the like (2) is connected upstream.