DE1609777A1 - Translucent cover or wall panel made of thermoplastic material - Google Patents

Description

Dlpl.-lng.R-Bsotz and ί "" ";"

Dipl.- Ing.Lamprodil ■ I Jl i '

Munich 22; Stelrwdoifclf. 10 L. ZT - "Jl ... ^ / ''"'""■''"'"" ^l j 1609777

490-1O.7O9P (10.71OH) 6.7.1965

Röhm & Haas G.m.b.H., Darmstadt

Translucent cover or wall panel thermoplastic plastic

The invention relates to a translucent cover or wall panel made of thermoplastic material, which consists of a longitudinally stiffened plate profile with a large width relative to its profile height consists.

Translucent plastic sheets, for example made of polyvinyl chloride, polyethylene, polystyrene, polyamides, polyacrylates and methacrylates, polyformaldehyde, polycarbonates and copolymers of the macromoloculars mentioned Compounds on which monomers are based are used extensively in construction and lighting technology. Flat or corrugated panes, deep-drawn tubs and dome-shaped structures made of organic glasses are used to cover artificial light sources and as absolute components for Daylight inlet openings known. By corrugation or beading

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Longitudinally stiffened panels made of fiber-reinforced plastics, if necessary, are used to clad balcony parapets light roofs and used as load-bearing structural elements in the true sense of the word for erecting greenhouses and »dglo«

If for architectural or other "structural reasons the length and width dimensions of the translucent Plates must be relatively large and the height of the plate profile is limited, can be done with the known designs the translucent cover or wall panels a sagging of self-supporting panels only by appropriate Avoid increasing the thickness of the sheet material. There is also the requirement that from aesthetic Reasons or for the sake of easier cleaning the plates one as possible should have a smooth surface, because of the low modulus of elasticity, the above-mentioned translucent Plastics, the required thickness of the plate material and thus the cost of materials as a whole are undesirable high. One is therefore more translucent when used Plastic cover or wall panels mostly for reasons of economy required the dimensions of the fields to be covered or terminated by a single plate relative to keep small and to accept a correspondingly higher effort for the supporting structure.

If special optical effects are to be achieved, for example a preferred direction of the luminous flux passing through the plate or a scattering of the light

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in certain directions, one uses either suitable ones Surface profiles that are difficult to keep clean, ο you build the panels from different elements together, which requires a lot of work *

The present invention is based on the object of providing the above-mentioned Hachteile of the known translucent cover or / wall panels made of thermoplastic material, which consist of a longitudinally stiffened plate profile with a large width relative to its profile height, through a novel formation of the plate profile eliminate »■ ^;

The inventive solution that achieves this object translucent plate is essentially characterized by that they consist of one with two thin outer walls forming the outer surfaces of the plate and numerous outer walls connecting in cross-section arranged like a grid or truss Reinforcement partition walls are made of extruded flat hollow sheet profile »*

By appropriately designing the outlet nozzle profile of the extrusion die used to manufacture the plate can be any lattice or truss-like arrangements the stiffening partition walls are obtained, the aem hollow sheet profile not only in the longitudinal direction, but also in its width with relatively little material expenditure give a high section modulus, even if it is relatively he entire profile height, the panels can be smooth

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outer surfaces are produced, which makes their cleaning much easier, and create special optical effects protected from dirt inside the panel hollow profile Surface profiles to be provided and / or by using a different, e.g. optically opaque or colored plastic material for certain profile parts, such as the partition walls or webs, achieve in the latter Fall the injection mold simultaneously from two separate mass feed presses with the differing, but under the pressures and temperatures prevailing in the extrusion die when they are brought together welded thermoplastic mass is fed »Finally the individual fields of the supporting structure can have large length and width dimensions, which in turn increases the burden for the production of the supporting structure is significantly reduced.

Because of their double walls, the invention translucent panels also have an excellent heat and sound insulation effect j they can also be exploited Their high rigidity in certain cases also use them as load-bearing elements, not only in their longitudinal but can also absorb greater forces in their transverse direction - in contrast to corrugated or corrugated plate profiles.

Incidentally, it should be clear that translucent panels designed according to the invention are primarily used there where larger fields are to be bridged? the hollow profile width of the panels should be at least ten times the width

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be their profile height.

TJm is the stiffness against sagging or sagging in the middle part of a panel arranged on a fringe, it is expedient to have at least one of the plate outer walls run slightly curved in cross section, so that for example the plate thickness and thus also the section modulus is greater in the middle latitude of the plate than at its edges} but the plate thickness can also be in the middle Width area be less than at the edges, then the plate is arranged with its concave side down.

To explain the invention in more detail, some exemplary embodiments according to the invention are more transparent Cover or wall panels made of thermoplastic material illustrated; show it;

1 shows a schematically illustrated cross section through a flat hollow sheet profile with stiffening intermediate walls arranged like a framework or webs, the thickness or height of which is greater in the middle width across the board than at the sheet edges} '- ■ -

Fig. 2 shows a rope of a plane-parallel plate profile crossing stiffening bars}

S ¹ Ig.2a an enlarged section from the profile according to I ¹ Ig. 2; · _ '.:'

3 shows a plane-parallel plate profile divided by a central wall with stiffening webs offset from one another above and below the central wall}

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3a shows an enlarged detail from the profile according to Fig. 3}

4 shows a part of a plane-parallel plate profile

with vertical and inclined stiffening bars;

4a shows an enlarged detail from the profile according to Figo 4.

The cross-sectional profile shown schematically in FIG. 1 of a transparent cover or cover according to the invention Wall panel, which is made of thermoplastic by extrusion molding, shows the "two smooth outer walls 1 and 2, which are connected in one piece by numerous stiffening intermediate walls 3, 3 '. The partitions 3 and 3 'are webs which are alternately inclined towards one another and which in cross-section show roughly a zigzag line »on its lateral sides Edges, the plate profile is closed off by terminal vertical webs' 4 »in the connection or transition points marked 5 between two webs 3» 3 * and one the outer walls 1 and 2 each have two webs converging, so that the cross section of the hollow sheet profile according to the invention resembles a flat triangular framework with rigid nodes »

The plate according to Fig «1 is for example for horizontal Installation intended as a large-area cover for artificial light sources; to prevent sagging in the middle of the panel avoid, the upper outer wall 1 - at least in its central part - slightly arched or curved upwards, so that

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1608777

also those lying in the middle area of the plate. Yerbindungsstege have greater lengths than that. Connecting webs in the edge areas of the plate .. .-. ■ - _:

However, it should be pointed out that, with a view to a clear drawing of the cross-sectional shape, the height dimensions of the panel profile are exaggerated and large compared to the close-up dimensions, i.e. the panel is actually much flatter or thinner than the drawing shows. _; - ■ '

The stiffening webs 3 and 5 'are each at angles oC inclined towards each other, between about 60 and 120 can lie *. "". "- .., _;

. With a Jlbdecleplatte tm width, for example, the thickness of the outer wall surfaces 1 and 2 and the thickness of the utege 3 and 5 'can be chosen to be about 1 πιπί} the largest height of the plate profile can be about 20 in the middle and about 12 mm at the edge. The cost of materials is low in view of the high resistance to bending and transverse bending of the profile, but above all the profile formation according to the invention gives the possibility of surface profiling on the inside of the Plattenliohlprofils on the side surfaces of the webs and / or the inside of the outer walls Provide for the achievement of special optical effects which, because of their good finish, cannot get dusty or dirty

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It should be clear that the mutually inclined webs 3 and 3 ^{r can} also be arranged in cross section like the rungs of a ladder between the outer walls and that the underside outer wall 2 can also be bent inwards or outwards, with either a profile with a lens cross section or a concave plate profile on the underside results, which can be used with its concave side facing downwards as a cover plate to be arranged horizontally.

The Pig. 2 to 4a show modifications in the arrangement and forming the stiffening partitions according to the invention Cover or wall panels, which are preferably applicable to plane-parallel panels and have certain advantages in terms of Material savings or the lighting effect result.

The plate profile according to Pig. 2 and 2a shows a "lattice truss" with between the outer walls 1 and 2 each other centrally crossing webs arranged 3 and 3 '"wherein the ridges and 3 ¹ are made thinner than the outer walls 1 and 2, security against buckling, however, by their one-piece connection in the intersection lines 6 is sufficiently large to ensure a high longitudinal and transverse bending strength of the profile,

The profile according to Pigα 3 and 3a can be imagined by merging two simple “ladder profiles ¹¹ with vertical webs 3a and 3b, which run at the same distance from the two outer walls 1 and 2 between them

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Middle wall 7 has "in the illustrated embodiment a thinner than the two outer walls; she only serves to connect the "ladder bars" in the upper and lower part of the profile offset by half a bar pitch 3a and 3b »those at 8 and 10 with the outer walls and at 9 are rigidly connected to the central wall ».

Such "combined" ladder profiles have the advantage over simple profiles of the same profile height that the wall thickness of the webs - which are stressed in bending and kinking when stressed by bending, in particular transversely to the longitudinal axis of the profile - can be made significantly smaller than with continuous webs <> The stiffening by the middle wall 7 * therefore has the effect, despite the material required for it, in a total reduction in the cost of materials with the same bending stiffness of the profile »

The webs 3a and 3b can on their side surfaces 11 and the outer walls on their inner surfaces 12 with a profile be provided.

It should also be pointed out that in the plate profile according to Fig. 3 or 3a, the arrangement of the webs 3a and 3b does not necessarily have to be vertical, as the figure shows} you can alternately incline the webs against each other, but without the ends of the webs in nodes, such as 5, in, the I ¹ Ig, 1 and 2 converge. The conductor profiles can also alternate with one or the other side

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inclined "web bars ¹¹ , the profile cavities bounded by the wall surfaces and the webs then have trapezoidal cross-sections, the large base lines of which are directed alternately to one and the other side of the profile.

FIGS. 4 and 4a show, finally, a "ladder-shape" with the outer walls 1 and 2 perpendicular connecting webs 3 'and' inclined diagonal webs. ^3? _T each having two opposed connecting points 13 between the webs 3 ¹ and the outer walls 1 and 2 in turn The diagonal webs 3 ¹ can either be parallel, as shown in the example, but they can also be alternately inclined to one another in adjacent half-timbered frames, so that a combination of a simple ladder profile with a zigzag web profile results.

Due to the special design of the extrusion tool, which is used for the production of the cover or wall panels according to the invention, with two mass feed channels to be fed separately, it is also possible to produce panel profiles in which, for reasons of strength or material costs, parts of the profile, for example only the webs or only the central areas of the webs consist of a thermoplastic material of different types or different compositions, which during extrusion under the pressure and temperature conditions inside the spray nozzle are firmly welded to the plastic material of the outer walls.

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It is also possible to achieve special lighting effects; for example, in the case of the profile according to Fig. 3 and 3a for the webs 3a and 5b Use middle wall 7 similar or at least weldable plastic when it is a matter of allowing light sources arranged above the plate to radiate freely downward through the plate, but to prevent glare to the sides by extensive light diffusion in the webs.,

With all profiles you can choose different colored plastic compounds for outer walls and webs or stiffening partition walls interesting stripes -]? ar.heffekte reach as the walls and walkways depending on the

More or less cover the viewer's point of view.

Even when using a uniform material for the entire panel profile through, for example, fine prismatic surface profiling of the webs and / or the inner

seldom reachable light-diffusing or also the outer walls light directing effect through. Soiling of the profiling cannot be affected to the extent that the good Thermal insulation and permeability to ultraviolet radiation, which, in particular, belong to the polymethyl methacrylate; is »do The transparent cover or wall panel according to the invention

ten to valuable components in numerous areas of application. "V-- V-

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Claims (10)

Claims 1. Translucent cover or wall panel made of thermoplastic Plastic, which consists of a longitudinally stiffened plate profile with its shape relative to its profile height large width ", characterized in that that the plate consists of a thin outer walls (1,2) and two outer walls forming the plate numerous stiffening partition walls that connect the outer walls in one piece in cross-section with a grid-like or lattice-like structure (3.7) extruded flat hollow sheet profile, 2o translucent. Plate according to claim 1, characterized in that that their hollow profile width is at least ten times their profile height » 3. Translucent plate according to claim 1 or 2, characterized in that at least one of the plate outer walls (1 or 2) is curved in cross section. 4. Translucent plate according to claim 1, 2 or 3 »thereby characterized in that the stiffening partitions numerous Are webs (3a, 3b) which are essentially perpendicular to the outer walls (1,2) and are spaced apart, which is approximately equal to one to one and a half times the height of the webs concerned (Pig. 3). 009818/0383 5. Translucent plate according to claim 1, 2 or 3, characterized characterized in that the stiffening partitions alternate mutually inclined, about one in cross-section. Zigzag or sawtooth-like ridges (3.3 "- or 3 '» 3 ") are (lig. T "or 4)«. 6. Translucent plate according to claim 5> characterized in that two adjacent webs (3,3 ') under a ■ Angle (OC) of about 60 to 120 are inclined to each other. 7 · Translucent plate according to claim 1, 2 or 3, characterized characterized in that they are one at approximately the same distance from the has two outer walls (1, 2) and a central wall (7) which runs essentially parallel to them and which is connected to the "two outer walls over to these perpendicular (5a, .. 3b ") or deviating mutually inclined webs (such as 3.3 ') in one piece terbunden is, the webs on both sides of the central wall in the direction of the Plate width by about half a spacing against each other are offset (Jig. 3) » 8. Translucent plate according to claim 1, 2 or 3, characterized in that the stiffening partitions are webs (3, 3 ') crossing each other in their longitudinal center lines (6) (Tig. 2 £ * - ~ - ~ "" ~ ^β '~' 9 ^: Translucent plate according to one of Claims 1 to 8, OD0818 / 038 3 characterized in that parts of the plate profile, such as the stiffening walls "or" the webs at least partially a thermoplastic material of different Type or composition that is welded to the material of the other profile parts during extrusion. 10. Translucent plate according to one of claims 1 to 9, characterized in that the partition walls (3, 7) and optionally also at least one of the outer walls (1, 2) of the plate hollow profile - this preferably on its inner wall surface (12) - have a surface profile. 000818/0383