DE1684216A1 - Heatable cladding panels - Google Patents

Description

The present "invention" relates to cladding panels, particularly for use in concrete construction ,,. Die Heatable to achieve rapid setting and hardening are.

It is used to accelerate curing and setting of concrete components already known, heatable Ifornen to use, this where appropriate; can also be from level liorm. Other, also, level! Parts ■ this JTorßi -could then: after the "pouring -and-: shaking of the ijebons with other flat surfaces of the concrete element to be brought into contact.

Such heatable forms are generally electrical Provided resistors, which are embedded in an insulating material, which the resistors of

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BATH ORIGINAL

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the parts of the form separates that with the concrete element come into contact. These arrangements have the disadvantage the poor conductivity of the parts of the mold or else, if certain magnesium compounds with significant 'thermal conductivity, which also help to isolate the electrical Resistors can be used, their high price. The subject parts at hand occur particularly when the The outer surface of the forms is metallic. =

The present invention aims to avoid these disadvantages and its subject is a heated plywood sheet onto which a concrete floor can be poured directly. This © according to the invention .Plywood sheet has a metal mesh or strips of a metal mesh or a thin metal foil a certain minimum electrical conductivity, these parts being electrically connected to one another in such a way that a low voltage supply is sufficient, metal fabric or metal foil are between plywood sheets of different Thickness, so that the dissipated heat is given off essentially only towards the side of the thinner plywood sheet will. Both sheets of plywood are preferably nailed through connected to each other, the length of which is the thickness of the thin sheet of plywood and which penetrate the metal thread or the metal foil and which are provided with a flat head that can penetrate a little into the thinner of the plywood sheets. The nail head can also be isolated by an electrically non-conductive varnish or a resin, which the_ anyway does not tolerate excessive heat. This insulation is * in the event that the nail pin comes into contact comes with the metal mesh or the · metal foil. '. ;

* thought

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BATH

It goes without saying that the "two sheets of plywood without Can be glued together with the help of hail. In this case, the connecting glue or resin must be used be able to endure the equilibrium temperature that occurs after a certain period of time in use. However, a glue connection of the two plywood panels is more expensive than the connection with nails.

As a heating resistor, strips of an Eupfer

fabric with a weight of 500 g per m, with 500 wires per running meter in the longitudinal and transverse directions. This heating resistor · is supplied with a power of about 1200 watts per m ^2, and then brings up the "on the thin sheet of plywood that are available concrete within 8 hours at a temperature in the order of 75 --80 ⁰ C.

On the side towards which the heat is to be given off, takes place Applying a very thin sheet of plywood, its thickness but should generally not be less than 4 mm, so that When heated, the individual layers do not become detached from one another or distortions occur. Distortions are allowed especially does not occur when an arched concrete element should be poured. '

As for the thicker of the two plywood elements, so is here a limit is actually only set by the price. Otherwise there is no upper limit for achieving high T / arm insulation to the side on which the heat is given off target. ■ - '■ "" ■

In practice, a thickness of * -20 mm is hardly exceeded here and this sheet of plywood will be used

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a good stiffness allows more beams or rafters to be connected.

The thicker of the plywood sheets can if a curved Concrete part is to be produced, also replaced by boards of smaller widths set up to connect with one another. "'

The heatable shuttering panel described above can be sandwiched between the thicker one of the plywood panels and the metal mesh belts or the metal foils a V / arm insulation material wi.e e.g. have a fabric made of glass wool or asbestos, where it is only required that this iso- lation tissue does not dissolve when it is compressed between the two elements of the heatable cladding panels or expires.

In a further development of the invention are the heatable formwork panels connected to a support table in such a way that this extends in its upper part in the longitudinal direction metallic support of a U-profile open at the top with inwardly bent legs, both of which are bent horizontally at the top to form a support surface and transversely extending girders or rafters fastened with S-pegs engaging in the slot formed in this way the heatable plywood panel opens with further, nails electrically isolated from the nails mentioned on the Rafter is attached. -. ■

An example embodiment of the device according to the invention will now be explained in more detail with reference to the released drawings.

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Figure Λ shows a section through a plywood panel equipped according to the invention.

Figure 2 shows a formwork arrangement for a concrete slab using "a heatable plywood sheet according to the invention.

Figure 3 is a perspective view of a formwork table with Hei ζ tr ans format or and "stiffening rafters. FIG. 4 shows a formwork table according to FIG. 3 in FIG Use.

FIG. 5 shows an individual representation of a longitudinal beam of the table in half-timbered construction and the attachment of the heatable Plywood board attached to it;

FIG. 6 shows the arrangement in perspective a heatable plywood sheet and a cladding sheet for the case of the use of three heating strips, FIG. 7 shows a casing in use in a side view of the heatable plywood sheet according to the invention, the thinner of the plywood sheets for producing a curved Concrete beam is curved and the thicker of the plywood sheets is replaced by boards lying next to each other that can be better adapted to the radius of curvature.

In Figure 1 it can be seen how the heatable plywood sheet 1 is made up of a metal fabric 2 and this is included is made of a thin sheet of plywood 1a and a thicker one. Plywood sheet Ib.

As already mentioned, the metal fabric 2 can be replaced by thin metal foils.

In Figure 2; Lst shows how such a heatable plywood ^ plate can be carried by J-longitudinal girders 3. With 4- is a called poured concrete ceiling.

109038/0411

Patent claims:

1. Heatable plywood sheet for use as cladding in concrete construction and to achieve fast setting, marked by one or more Metal fabric strips or metal foils (2) to form an electrical heating resistor and switched to Supply at low voltage, with the resistor (2) between layers of plywood, one of which (1a) of small thickness and for the transfer of thermal energy the concrete element (4) to be poured is suitable and the other (1b) of greater thickness and suitable for thermal insulation is"

2. Heatable plywood board according to claim 1, characterized

g e k e η η ζ ei c h η e t that the thicker of the plates (1b) is composed of narrow individual elements (24;! Figure 7) lying next to one another for adaptation to a Curvature.

3. Plywood panel according to one of the preceding claims, 'characterized in that to connect the two panel elements (1a and 1b) nails (18a) are used, the length of which is greater than'der gjgke * of the two plywood panels (1a) corresponds to " ¹ um die Penetrate metal fabric strips or metal foils (2).

■ • vs "» (tr

4. plywood panel according to claim 3, characterized g e k e η η ζ e i without t that the nails (I8a) 'with a flat head, which in the thinner the Plywood sheets (1a) can penetrate.

the thinner

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5. Plywood panel according to claims 3 or 4, d ad u r cn characterized in that the heads of the nails (18a) electrically isolated by a synthetic resin or a lacquer who can withstand the temperatures reached *

6. Plywood panel according to one of the preceding claims, thereby g e k e η η indicates that the "both plate elements (" Ia and 1b) by means of an electrically insulating glue connected to the maximum occurring Endures temperatures. "

7 · plywood according to any one of the preceding claims, characterized geke η η% '■ a leans _v that as heating element a copper ge tissue of about 500 g per m ^ and 500 yarns per meter in both Hiehtungen is used, the per ffi2 a Iieistungsftitfneliiiö of has about 1 £ OQ watt *

's-

8. Plywood panel according to one of the previous, end2i claims, thereby g β ke η η 4 = "* · - i, © ■ ·; & ■» ■ «■■ t,. D« tß ate thinner of the plywood sheets (1 #) eijae fttßke voa is about -4 mm »·

9 »Plywood panel according to one of the preceding claims, characterized in that η ζ calibrated η et _t that on the concrete part (4) deposed. On the side of the resistance element (2) a layer of insulating material, such as glass or asbestos wolves, is provided.

10 »Heiabarer Y formwork table for Betoiifeö (ien _r gek β η η ζ ei c h η et by a heatable plywood sheet according to the preceding claims and in that it has metallic longitudinal beams (6), the upper end of which by an IT profile open at the top ( 16) with initially curved inwards and then to form a support surface

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Claims (1)

-6 - The shoring table 5 shown in FIG. 5 has longitudinal members 6 in a framework construction, on which rafters 7 extending in the longitudinal direction are placed. The legs of the table are connected to one another by a cross bar 9 to which the transport rollers 9a are attached. It Height-adjustable feet 10 are provided. The table 5 carries in a suitable place, e.g. below the Longitudinal beam 6 suspended, a transformer 11. The suspension is denoted by 12. Oil application of this formwork table is shown in Figure 4-. The table rests on a booth 14 between two facade walls 13 and 13a · The floor of the next higher floor 14a is poured onto the heatable plywood sheet 1, which in turn on .Quers rafters 7 rests. The floor is with a Probation deposit 15 provided. The lattice girders 6 have profile girders 16 at the top and bottom, those in cross-section approximately U-shaped with initially turned inwards and then horizontally to form a support surface bent legs are designed. The one between the two Legs remaining gap is thus for clamping e.g. of a nail. Both longitudinal members 16 are mutually through in cross section circular truss 1? tied together. In Figure 5 is further shown how the hail 18 the rafters penetrates and with its tip in the gap of the upper profile beam 16 comes to rest and is thus determined. The heatable plywood sheet 1 is by means of further nails 18a 1Q9 & 3S / Q411 bad original attached to the rafters 7 ". These penetrate the heating elements, So the metal fabric tapes or foils and are opposite the nails 18 and thus also opposite the Profile supports 16 and the longitudinal support 6 are electrically insulated. An example of an arrangement of the heating bands is shown in FIG shown where the heating circuit consists of a strip 19 and two further strips 19a and 19b. These are connected to one another by metal strips 20 in series, with the electrical energy is fed in at 21. If in an arrangement according to Figure 6, the rafters 7 below the remaining area 19c come to rest, so come the In any case, nails 18 are not in electrical contact with the heating elements. There is then no need for special nails to attach to the rafters and to attach the latter the profile girders are provided. In Figure 7, a shuttering 23 is shown for arched concrete girders. Here, the thicker of the plywood panels (Tb) is replaced by boards 24, above which the metal mesh or metal foils come to lie, and the thin plywood layer 1a. _: _ At 20 is a manufactured with the device according to the invention Designated concrete beam, which has a reinforcement 22a and is cast on a temporary support 25. . Claims: 10933 8/0411 OBSGtNAt legs bent to the horizontal are formed, wherein fastening nails (18) in the one between the legs formed gap can be clamped. 11. Formwork table according to claim 10, characterized characterized in that the curable plate (1) rests on transverse rafters (7), the rafters (7) with Nails (18) connected to the side members (6) of the table are and the plate (1) and the rafters (7) connecting Hail (18a) are electrically isolated from the nails (18). 12. Formwork table according to claims 10 and 11, since you rc h g e k e η η ζ e i c h η e t that he has a carrier (12) for receiving a transformer (11). 109838/0411 e r e i t e