DE102008053714A1 - Extruded T-shaped joint extension profile for floor construction, has foil clothes meshed with lower side of profile of pavement, where profile has t-shaped cross section and stays in functional position on head - Google Patents

Abstract

The profile (1) has foil clothes (4) meshed with a lower side of the profile of a pavement, where the profile has a t-shaped cross section and stays in a functional position on a head, so that the head forms a foot. The profile is enclosed by the pavement on both sides. Each foil cloth has a thickness of about 0.03 to 0.1 millimeter. The foil cloth is folded in a zigzag or curling manner. The foil cloth has a width of about 50 to 150 millimeters and a length of about 5 to 15 millimeters, where the profile is welded after extending with the foil cloth.

Description

The The invention relates to the production of expansion joint material for Screed. The screed, like other parts of the building, is subject to stretching when heated or contraction when cooled. Of the Total amount of stretch or contraction is of screed dimensions dependent, with the length as a factor of the coefficient of expansion and to the temperature in the bill.

It It is known that the elongation to extreme wall loads and the contraction can lead to cracking. at larger screed surfaces is therefore trying to install expansion joints. The expansion joints will be so attached that the expansion joints and, if necessary. adjoining walls / edges enclosed screed surfaces not damaged or destroyed by stretching and contraction become.

DIN 18 580-3 distinguishes between joints in unheated screed, joints in heating screed and expansion joints.

The Joints are supposed to be over existing building separation joints (Building joints) at the same place and in the same width in screed and topping be formed. The joints should also be in doorways between foreign living and working areas from sound technical Reasons to be scheduled. The DIN sees a minimum width of 5 mm before. Depending on the nature of the screed material, including his Length and depending on occurring temperature differences also larger latitudes for the movement joints. It also gets bigger Lengths and at angled surfaces, constrictions and doorways the basic Use of movement joints recommended.

The Expansion joints must be kept open after they have been created become. That is why it is not sufficient when using formwork boards a fugue is created. After removing the formwork boards there is the danger that the expansion joint in further construction added by dirt. At first, that's when it's shed of liquid screed for the application of joint tapes led, which are known from the outside area. In recent times, it has been transferred to to use the expansion joints in screed plastic foam strips. These are plastic foam strips on both sides laminated with unfoamed plastic. The laminated unfoamed plastic, z. As PET or PVC, has in comparison for plastic foam even at 0.4 mm thickness, a relatively high strength and is smooth, so that the screed is not in the material clawed and undisturbed relative movement in the longitudinal direction the joint is possible.

The Foam strips are set up before screed casting or after the screed casting in the still liquid Screed pressed.

Of the Plastic foam has so much stiffness that it is under does not significantly yield to the pressure of the liquid screed, but easily gives way at a thermal expansion. In subsequent Contraction of the screed follows the plastic strip of the contraction movement. This ensures that no dirt fills the joint and precludes stretching.

To the Setting it up is known, the plastic foam strips on one L-shaped angle profile made of unfoamed plastic to fix. The angle profile has a double-sided inside adhesive self-adhesive tape. The one side of the self-adhesive tape is glued to the angle profile, the other has a cover. After removing the cover, a bond can be made with the angle profile become.

It is also known, the plastic foam strips and the angle profile on possible heating cables of a floor heating prepare. In the angle profile are semi-circular recesses incorporated in the upstanding leg. The plastic foam strip has in the downwardly projecting edge punching. It is it is a two-sided separation of the laminated non-foamed Film and a partial separation of the intermediate plastic foam, so that the stamped part by hand without the help of tools can be removed.

To the gluing is the plastic foam strip with the angle profile at the desired location before pouring the Screed set up.

The previously used plastic angle with the self-adhesive tape form a pretty elaborate part. It therefore has efforts given, the mounting of the plastic foam strip with less To allow effort.

According to an earlier proposal, the expense of the plastic foam strip is formed by at the lower end of the foam strip by other means a Kunststoffuß, which is self-adhesive formed on the bottom and therefore unfolds optimal adhesion conditions when it is pressed against the substructure. As a result, slipping of the foam strip during screed casting is not to be feared. Although the occurring pressures should go to zero, because the foam strip does not have the function of a formwork and only to cause a gap formation. The screed should if possible on both sides of the foam evenly shed. However, overly rough work can still cause pushing forces.

to Formation of the plastic nut on the plastic foam strip a lower part of the foam strip is permanently bent over and at the bottom of the foot with another plastic strip strengthened.

At the Kinking gives the laminated non-foamed plastic film a significant help by heating up the kink and is cooled again in a bent state. The unfoamed Plastic gives so much to the kink in the plastic foam strip Strength that an undesirable regression is avoided. This is especially true for rigid plastic films.

there finds a kinking of the plastic foam strip after both Pages held, so that, if necessary. Occurring restoring forces Counteract each other and already largely or even completely cancel.

For the laying of pipes on the substructure of the screed are at the older plastic foam strip below breakthroughs intended. Nevertheless, the older solution still shows Improvement.

For The cables are held in place using scissors or tongs Make openings in the plastic strips. Advantageously, in a production of the openings in place of the unnecessary preparations apart from openings / breakthroughs. The Manufacturing can be based on the actual required openings / breakthroughs be limited.

Furthermore opens up a very simple production of openings / breakthroughs in that plastic foam strips with shear thickness or pliers thickness can be used, whose angled foot to Cut out the openings / openings again bendable or rückbiegbar is. The scissors and pliers provide a very convenient way to make the openings / breakthroughs.

The material composition according to the invention allowed the bending and cutting by hand with scissors or pliers. The Turning or bending back is particularly of the thickness the non-foamed on both sides of the foam layer provided Slides dependent. Their thickness is preferably smaller or equal to 1 mm per film, the entire plastic foam strip preferably has one Thickness from 6 to 12 mm. The question of when the limits of cutting ability reached, can be with very few cutting attempts clear with scissors and pliers. In the context of this application is called scissors thickness, which is done by hand with a pair of scissors is capable of cutting. Accordingly, as a pliers thickness denotes what can be cut by hand with a pair of pliers.

Already after the older proposal is provided, the foam strip for bilateral L-shaped bend of the lower plastic foam strip edge to split. There are two free legs at the bottom. The Cleavage can be done thermally with a heating wire or a heated knife or mechanically done with a rotating knife. Preferably the plastic foam of the core is completely or partially recovered ablated. Optionally, the unfoamed Slides also faced a supernatant down possess the plastic foam core and right at the bottom of the Plastic foam core are bent, so that the cleavage the plastic foam core and, if necessary, the removal completely or partially unnecessary become.

Cheap is it, the split lower edge when splitting or after the To detect gaps and with simultaneous kinking of the unfoamed film in the intended angular position bring. The targeted heating is preferably carried out with a heating wedge or a heating knife. The subsequent to the kinking Cooling can be done with the help of a blower.

ever The more rigid the lamination, the more accurate the kinking remains. The rigidity largely depends on the thickness. Therefore is for the laminating film preferably a thickness of 0.2 mm. Especially favorable conditions at 0.3 to 0.4 mm. Bigger thicknesses are not excluded.

Preferably The plastic films are laminated on the plastic foam strip. When laminating the Kaschierflächen be on laminating temperature warmed up and pressed against each other. Regularly is not necessary, the surfaces on molten liquid bring to. The heating can z. B. with a hot air blower respectively.

The Lamination operations require a laminating ability.

Provided the materials to be laminated are related to each other the lamination is particularly easy. A relationship is in this Given sense, if in the lining material a significant Part of the material is located, from which the plastic strip has been produced. With the same material optimal conditions arise.

at lack of kinship can be partly due to warming and pressure a desired adhesion can be generated.

To the Part of the liability is achieved only with the help of adhesion agents.

Under the foot is an adhesive layer / tape for the placement provided on the substructure.

At the Gluing exist depending on the adhesive hardly essential requirement for materials to be joined together. It was found that a butyl adhesive special advantages unfolded. Such an adhesive fits especially in greater thickness in rough conditions excellent at the construction and the dirt that occurs there. dirt squeezes into the glue and gets trapped there. Adhesive layers up to 3 mm are readily economical with butyl adhesive represented. If necessary. The butyl adhesive is also foamed in Form and in the form of narrow strips used.

The Thickness of the foot is at least equal to the thickness of one on the film provided plastic foam strip plus the adhesive. At the top, the thickness is largely freely selectable / enlargeable.

The Width of the foot is on a larger scale likewise freely selectable. A bigger one Footprint, of course, has its advantages. It However, it is also the stackability and transport and Shelf life to observe. This is called stack size / stack width. From the Stapelmaß / stack width can also by choosing larger Widths are deviated. Preferably, a width is up to 100 mm provided.

As already executed, can all on the substructure laid lines in a very economical manner become. As lines, the pipes come from underfloor heating systems or heating pipes, electric cables, water pipes, telephone lines, Empty pipes, etc. into consideration.

While the initially explained two-part strip construction Assume that in the laying of the line already the Bottom part of the strip construction is mounted and thus significant complications arise, simplifies the application of the invention Streifens considerably. Advantageously, the Trades "Laying" and "Laying the strip construction "no longer overlapping be executed. Only the appointment coordination and the Arrivals and departures cause overlapping execution considerable costs associated with the invention Procedure be dispensable. Further savings result according to the invention by the one-piece construction. To the Advantages include the one-piece production, also a lesser Workload for laying the plastic foam strips.

The Pliers provided for cutting can be interchangeable Matrices and patricks be provided. Advantageously, can Matrices and Patritzen especially for all common Line shapes and cable diameter can be used. Thereby can use the openings / breakthroughs low tolerance can be produced. That leads to low Gap widths between lines and plastic foam strips and already a major seal. A further sealing can be achieved with sealants. As sealing compounds are also suitable Textiles in the area of plastic foam strips around the pipes be wound and close the mentioned gap. ever by nature, the textiles are also suitable inaccurate openings / breakthroughs seal.

suitable Textiles can be cloth scraps / pieces and / or non-woven scraps / pieces or also tangled fibers like wool ball.

At the Cut it is usually not necessary on the adhesive strip provided under the foot consideration to take. As long as the adhesive strips with the protective film / release film are covered, no connection of the free edges to fear each other.

To the cutting causes the elasticity of the plastic its regression into the original L-shape. Then the remaining protective strips are removed and the plastic foam strips placed on the substructure.

Other Expansion joint profiles have a T-shape. The T-shape can be right from the start be given or arise by unwinding webs. The T-shaped Expansion joint profiles are placed upside down, so that the head forms a foot. As with the L-shaped Profiles is an adhesive strip on the head or on the foot intended. As with the L-shaped profiles can the T-shaped profiles with recesses for lines be provided.

The T-shaped profiles are extraordinary in practice common.

Also The invention has the object of an expansion joint profile to accomplish. The invention is a T-shaped Profile that looks like the above explained profile on the Head is placed.

Of the Head or foot can be present from the beginning or later by bending or by folding arise. In that regard, the builds Invention on existing profiles.

in the Difference to the existing profiles is the invention Profile but at least provided with a foil flap, opposite projecting the foot of the profile and engages under the screed. Optional are also provided two film tabs or more film tabs. The Foil tabs should be attached to the profile and laterally extend from the foot, so that the screed over the foil flaps spreads. The foil flap forms an advantageous Sealing with the support for the profile and prevent or counteract a floating of the profile in the screed. In addition, the foil flap stabilizes the joint profile within limits. The foil flap also protects the profile against Tip over. In the application on the one floor heating cause the film tabs a very advantageous seal, because Afterwards they lay around the heating of the heating.

Preferably find film flaps with an elongation greater than or equal 50%, based on the film flap width, application.

at The processing of the film laps of the pad fit the better the thinner the films become. Preferably the thickness is at most 0.1 mm, more preferably at most 0.05 mm and more preferably at most 0.03 mm. film thicknesses less than 0.01 mm are unlikely to occur. The protruding over the foot of the profile Foil width is at least 50 mm. preferably at least 100 mm and most preferably at least 130 mm. The whole width of the film flap depends on the width of the profile foot and from the height where the foil flap on the profile is attached. This may, for example, an additional Length of 50 mm.

Optional the films are folded zig-zag. The processed Film thus has a much greater length as the joint profile, so that also large bumps can be enclosed. The wrinkles preferably have one extension length per fold of at least 5 mm, even further preferably at least 10 mm, and most preferably from at least 15 mm.

On a film length of 100 mm are preferably at least 3 folds, more preferably at least 6 folds and highest preferably at least 9 folds provided. The slides are with the Zig-zag folding prepared as a folding position and in this position welded to the profile.

A greater length of the film compared to the Joint profile can also be achieved by a strip-shaped Profile is stretched before welding with the Folen. After welding and unloading, the profile tightens together again. This leads to wrinkling in the films.

Furthermore It is beneficial if the foil tabs on both sides of the profile at a height above the foot of the profile are arranged larger than the height is up to the piping systems of underfloor heating or the like.

Optional the film tabs are welded or glued to the profile

• a) Breite von 2 bis 20 mm, noch weiter bevorzugt von 5 bis 15 mm, höchst bevorzugt von 8 bis 12 mm
• b) Länge von 10 bis 60 mm, noch weiter bevorzugt bis 50 mm, höchst bevorzugt bis 40 mm
• c) Abstand voneinander von 10 bis 100 mm, vorzugsweise bis 75 mm, höchst bevorzugt bis 50 mm
• d) Dicke bis 0,5 mm, vorzugsweise bis 0,35 mm, höchst bevorzugt bis 02,5 mm

Advantageously, the bonding of the profiles on the substrate described in the above-described profiles can be at least considerably reduced, because there is no danger that the screed penetrates under the profiles and causes a floating of the profiles. However, a reduced bond may be helpful to facilitate the positioning of the profile. Preferably, the adhesive surface is reduced by half compared to the conventional adhesive surfaces described above. This is achieved in the simplest case, that instead of continuous adhesive strip according to the invention only strip portions are provided on the underside of the foot profile. Preferably, the strips have a

• a) width of 2 to 20 mm, more preferably 5 to 15 mm, most preferably 8 to 12 mm
• b) length of 10 to 60 mm, more preferably up to 50 mm, most preferably up to 40 mm
• c) distance from each other from 10 to 100 mm, preferably to 75 mm, most preferably to 50 mm
• d) thickness up to 0.5 mm, preferably up to 0.35 mm, most preferably up to 02.5 mm

The Adhesive strips are a high cost factor on the profiles. Your Reduction is very important for economic efficiency the profile production.

In the drawing an embodiment of the invention is shown:
With 1 is an extruded T-shaped expansion joint profile of plastic foam referred to, which is upside down. The profile is on the insulation 2 made of polystyrene particle foam (EPS) for floor construction. The insulation 2 is composed of 30 mm thick plates.

Both sides of the profile 1 are foil flaps 4 welded.

To the floor construction still belongs Est rich 3 which the profile 1 encloses on both sides. The profile 1 Made of foamed polyethylene (PE), the film flaps 5 made of unfoamed PE. The profile has a density of 30 kg per cubic meter.

The slides 4 have a thickness of 0.03 mm each.

The Profile is offered in different heights. Intended is in the embodiment a height of 60 mm, in others Embodiments of 40, 80, 100 or 140 mm. In other Embodiments are heights of 20 to 300 mm provided. The heights correspond to the desired screed thickness.

The Foil tabs in the embodiment have a width of 180 mm. The film extends to a height of 50 mm on the profile and is welded at the top with the profile.

The welds 5 the foil flap 4 are in the embodiment in a height of 50 mm. This allows the application of the profile 1 for a floor construction with a floor heating. In such a floor construction, the film tabs above a in 2 shown piping 10 lie for a floor heating. In 2 is the screed with 11 designated.

To the floor construction still belongs to an unillustrated Flooring.

The Expansion joint profile protrudes in the embodiment up the top edge of the floor covering.

3 shows the welding of a profile provided as a PE foam strip 15 with a non-foamed PE film 18 shown. The plastic foam strip is under considerable tension, which causes an elongation of 40%, based on the original length in the tension-free state in the embodiment. The foil 18 is largely stress-free.

Both will be between two rollers 16 and 17 guided. Before the nip, a hot air blower, not shown, is arranged, which melts the surfaces with which the film and the plastic foam strip touch in the nip. By the pressure of the rollers 16 and 17 it comes to the welding at the contact surfaces.

To welding the foam strip is relieved and directed. After relieving the foam strip retracts together. The film undergoes a folding here is called crimp folding.

In other embodiments is the elongation of the PE foam strip preferably at least 25%, more preferably at least 50%.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited non-patent literature

• - DIN 18 580-3 [0003]

Claims (10)

Expansion joint profile for a floor construction with a screed layer, wherein the profile has a T-shaped cross-section and is in the functional position upside down, so that the head forms a foot, wherein the profile is enclosed on both sides of the screed, characterized in that the profile is provided with at least one film tab, wherein the film tabs opposite to the profile with the screed engages under Apparatus according to claim 1, characterized by two film tabs attached to the profile on both sides. Apparatus according to claim 1 or 2, characterized by a film thickness of at most 0.1 mm, preferably a film thickness of at most 0.05 mm and highest preferably a film thickness of at most 0.03 mm. Device according to one of claims 1 to 3, characterized in that the opposite the foot of Profiles projecting film width at least 50 mm, preferably at least 100 mm and more preferably at least 150 mm. Device according to one of claims 1 to 4, characterized by a zigzag folding or crimp folding the foil flap. Apparatus according to claim 5, characterized by Folds with an extension length of each fold of at least 5 mm, preferably at least 10 mm and more preferably at least 15 mm. Apparatus according to claim 5 or 6, characterized that the number of folds per 100 mm foil flap length at least 3, preferably at least 6 and even more preferred is at least 9. Device according to one of claims 1 to 5, characterized in that the profile after stretching welded to the foil and after welding is relieved again. Apparatus according to claim 8, characterized by an elongation of the profile of at least 25%, preferably at least 50%, based on the stress-free original length. Device according to one of claims 1 to 9, characterized in that the film tabs in a Height attached to the profile, which is larger than the height of the piping for underfloor heating is.