EP1926861B1 - Dimpled sheet and method for producing such a sheet - Google Patents

Description

The invention relates to a dimpled sheet, in particular for building purposes and preferably for use as a foundation wall protection or drainage track, with a flat area and a plurality of protruding over the flat area, a knobbed shell and possibly a Noppendeckel having nubs. Furthermore, the present invention relates to methods for producing a dimpled sheet, in particular for construction purposes and preferably for use as a foundation wall protection or drainage, in the deep-drawing process, wherein the dimpled sheet having a flat portion and a plurality of over the flat area projecting, a knobbed shell and possibly a Noppendeckel Nubs, wherein the dimpled sheet is made from a thermoforming sheet.

Striped membranes of the type mentioned are already known from the prior art. Such dimpled sheets are usually produced by deep drawing. The thermoforming process refers to the so-called thermoforming. For this purpose, a flat film of uniform thickness is first produced. Thereafter, the film is deep-drawn either in still hot and thus plastic state or after prior heating via a tool. In principle, it is also possible that the thermoforming is carried out not in the thermoforming process but cold.

In the case of dimpled sheets, it is generally crucial to have the highest possible compressive strength of the knobs. The more pressure-resistant the knobs are, the greater the possible installation depth with increasing earth pressure or the load capacity for horizontal laying. The compressive strength of a dimpled sheet is determined by several factors. An essential factor here is first the basis weight of the dimpled sheet. Furthermore, the geometry of the nub affects the load limit. For truncated conical nubs, the flank angle of the truncated cone has just as much influence as the number of pegs per unit area. Another determining factor is the modulus of elasticity of the raw material used. This determines the maximum force when reaching the yield strength of the loaded dimpled sheet and thus its rigidity. However, high stiffness generally suffers from the impact resistance and flexibility of the dimpled sheet and thus the user-friendliness.

In order to achieve an increase in the resilience of the dimpled sheet with existing dimpled geometry and given raw material, so usually a thicker flat film is used. However, this additional use of raw material has a disadvantageous effect on costs.

From the US-A-2004/0076474 is already a dimpled sheet with a flat region and a plurality of projecting beyond the flat area, a knobbed coat and a Noppendeckel exhibiting nubs, the nubs have in their upper nub area over a directly adjacent area protruding bead. However, it has been found that the known dimpled sheet offers only a conditional load capacity despite the bead.

Object of the present invention is to provide a dimpled sheet or corresponding method for producing a dimpled sheet available, with an increase in the load capacity of the hollow knobs having dimpled sheet results without additional use of raw material.

According to the invention, it is provided in the case of the above-mentioned dimpled sheet that at least one dimple has, in its upper dimple area, a bead projecting beyond the immediately adjacent area. The nub is thus formed in the invention so that the upper nub area is ultimately designed to absorb higher loads than the lower nub area and thus has an increased load capacity. The invention is based on investigations in connection with the production process. It has been found that fundamentally different wall thicknesses occur in the deep drawing process due to the extraction and stretching of the material. So far, efforts had been made to achieve a uniform distribution of the wall thickness in the dimpled sheath. It was considered that if the thickness distribution is uneven, the zone of the smallest thickness determines the load capacity. Experiments have shown that the knob bulges at a corresponding load when the material over a large area, the yield strength is exceeded. It has been found that geometric changes while maintaining the wall thickness bring no advantage. Behave like that z. B. knobs with ribbing of the lateral surface or training as polygonal truncated pyramid no different than pure truncated cones. Investigations in connection with the invention have now shown that the completely uniform thickness distribution in the dimpled casing is not the cheapest. If, for example, a frustoconical nub is loaded, the highest stresses occur in the upper region of the lateral surface. In contrast, the lid surface and the foot area experience only reduced tension. This stress distribution also results in nubs that have a different geometry than the truncated cone.

With regard to the above-mentioned test results, it is provided in an alternative according to the invention that in order to achieve a high loading capacity or carrying capacity with little use of material, it is only necessary to correspondingly reinforce the upper knobbly area with a bead projecting over the or the immediately adjacent areas to provide increased compressive strength, while the lower nip area and / or the flat area do not require such training. Accordingly, the dimpled sheet according to the invention can be made in part without additional use of material as known dimpled sheets and thus without higher production costs, with a significantly increased load capacity is given. Thus, the increased load capacity in the upper knob area can be achieved, for example, by distributing the raw material mass in the nub so that the greatest concentration is present in the region of the highest load. This is achieved in the case of this alternative according to the invention in that the region of increased load-bearing capacity is thickened or provided with the bead with respect to the lower nub area. The thickening or the bead should preferably be formed circumferentially as annular bead.

In particular, it has been found in connection with the present invention that the highest stresses occur in the upper half and in particular in the upper third of the lateral surface, in particular the annular region at the transition from Noppendeckel to Noppenmantel and in particular below the upper end of the dimpled shell and so that it is highly loaded below the transition from Noppendeckel to Noppenmantel. Accordingly, it is provided in the invention that the area of increased load capacity provided in the upper third and in particular in a ring area at the transition or below the transition from Noppenmantel to Noppendeckel is, so that this area is designed to accommodate higher loads than the lower nub area and the flat area.

According to the invention, the annular region, which preferably begins shortly below the transition from the dimpled casing to the cup top, has a width which lies between one sixth and one third of the height of the dimpled shell.

When the dimpled sheet is made by deep-drawing, it is usually such that the conversion thickness of the dimple in the dimpled casing to the upper end, i. towards the Noppendeckel increases. In this case, a wedge-like or even approximately conical shape is achieved. In principle, a continuous or permanent conversion thickness can also be achieved in other production methods. In the context of the present invention, however, it is independent of the manufacturing process so that the bead as a local increase or thickening of the immediately adjacent region, which adjoins, for example, down to the bead lifts. This local projection is ultimately independent of whether the wall thickness of the dimpled shell is constant or increases substantially continuously in the direction of the nubeck.

In this context, it should be noted that the ring shape ultimately designates a circumferential shape, regardless of whether the ring is round, oval, polygonal or has another shape. Basically, the ring must not be closed. The ring may be composed of individual ring segments which need not necessarily be connected together.

Various production processes are suitable for producing the dimpled sheet according to the invention.

In a first embodiment of the manufacturing method according to the invention it is provided that for producing the thermoforming sheet on a starting flat film substantially constant thickness regions thickenings are applied, and that the thickenings are applied to such zones or areas where nubs are deep-drawn and after thermoforming the upper nub region and in particular a ring area in the upper third of the nub at or below the transition from Noppenmantel form to Noppendeckel.

The second alternative differs from the previous one in that, after deep-drawing the thermoforming sheet, thickenings are applied to the upper nub area and in particular to the ring area in the upper third of the nub at or below the transition from the nub coat to the nub top. In the case of both abovementioned alternatives, it is ultimately possible to additionally supply material in the melt stage, which is preferably applied annularly before or after the deep-drawing process. This can be done by placing and welding of annular discs as well as by supplying melt from annular nozzles.

In principle, it is also possible, without feeding additional melt before the deep-drawing process, the bodies or thickening at the desired zones to create. For this purpose, it is provided in the third alternative of the manufacturing method according to the invention that for the production of thermoforming a starting flat film substantially constant thickness is calendered such that areawise thickenings result by accumulation of mass, and that the thickenings are generated at such zones where at Deep drawing process is the largest shell thickness to arise, namely in particular in the ring area in the upper third of the knob at or below the transition from Noppenmantel to Noppendeckel.

Another way to create thick spots or thickenings is to cool the zones concerned before the deformation begins. For this purpose, the fourth alternative method provides that for the production of thermoforming a starting flat film of constant thickness is partially cooled and that such zones are cooled, where nubs are deep-drawn and after deep drawing the upper nub area and in particular the ring area in the upper third of the nub form at or below the transition from the dimpled shell to the Noppendeckel. As a result, the zones which are colder by a few degrees of temperature become less plastic and less mass is drawn off from these zones during the deep-drawing process than from the other warmer zones Areas. The cooling of the respective zones can z. B. by blowing with air. The air can be directed through a mask on the zones to be cooled. Another possibility is to direct the air with a variety of individual nozzles on the zones.

The basic idea of the fourth production alternative is to achieve temperature differences between individual regions of the thermoforming film. This idea is also based on the fifth alternative method. The necessary temperature differences are generated by the fact that the temperature is raised in the zones of the knob, which are to be pulled down later. These are ultimately the zones that form the lower nub area after deep drawing. This can be done with heated air, which is concentrated via a mask or individual nozzles on the desired zones. The increase in temperature can also be done with heat radiators.

A further possibility of concentrating raw material mass in the region of the highest load of the nub provides the sixth embodiment of the method according to the invention. In this process, web material is displaced from the lower nub area and / or the nub cover into the upper nub area and in particular into the ring area in the upper third of the nub at or below the transition to the nub coat from the nub coat to the nub cover during thermoforming. This is preferably done in the last phase of the deep-drawing process, while the deformed plastic mass is sufficiently plastic. The displacement in the area in question is generated via a predetermined shape of the thermoforming tool. Thus, for example, a positive upper and lower punches can be used during deep drawing in order to concentrate mass in the upper third of the outer and / or the inner jacket zone.

In the further alternative method is provided that after deep drawing web material is displaced from the Noppendeckel to the outside, so that there is an annular bead at the transition from Noppenmantel to Noppendeckel, so that at this point a higher degree of stress can be absorbed. This method can be realized, on the one hand, when the deep-drawn dimpled sheet is still in the lower die of the deep-drawing mold, namely in that a stamp displaces the material out of the area of the nub cover to the outside. In the other alternative, a separate form of the thermoforming mold is used with top and bottom punches, the knob form-fitting sits on the lower punch and the upper punch is used to displace melt from the lid area.

It should be pointed out, moreover, that in all alternative methods in which an increased load-bearing capacity during deep-drawing is generated, it is fundamentally also possible to achieve the increased load-bearing capacity in the upper region by means of appropriate measures only after deep-drawing. Thus, for example, a bead or a material reinforcement in the upper knobbly area can also be produced by subsequent application or attachment of material.

Incidentally, it is understood that the above and subsequent range not only includes the respective specified start and end values but also all within the interval limits values, even if these values are not specified in detail.

Fig. 1

schematisch einen Bereich einer Noppenbahn in Draufsicht,

Fig. 2

eine Draufsicht auf eine Tiefziehfolie nach Kalandrierung zur Herstellung einer erfindungsgemäßen Noppenbahn,

Fig. 3

eine Querschnittsansicht einer Noppe in zwei Ausführungen einer zum Stand der Technik gehörenden Noppenbahn mit gleichmäßiger Wanddicke,

Fig. 4

eine Querschnittsansicht einer Noppe einer Noppenbahn,

Fig. 5

eine schematische Querschnittsansicht eines Noppens einer erfindungsgemäßen Noppenbahn, wobei eine Materialverdickung durch Abkühlung erzeugt wird,

Fig. 6

eine Querschnittsansicht eines Noppens einer erfindungsgemäßen Noppenbahn während des Tiefziehens, wobei eine Materialverdi kung durch Verdrängung erzeugt wird,

Fig. 7

eine der Fig. 6 entsprechende Ansicht einer anderen Ausführungsform einer erfindungsgemäßen Noppenbahn,

Fig. 8

eine Querschnittsansicht einer Noppe einer Noppenbahn, wobei die Materialverdickung durch Verdrängung durch ein separates Formwerkzeug erfolgt,

Fig. 9

eine Querschnittsansicht einer Tiefziehfolie für eine Noppenbahn und

Fig. 10

eine Querschnittsansicht einer Noppe einer Noppenbahn, die aus der Tiefziehfolie gemäß Fig. 9 hergestellt worden ist.

Hereinafter, a conventional dimpled sheet, but otherwise different Noppenbahnen invention, which are prepared by different methods of the invention, shown in detail and described. It shows

Fig. 1

schematically a region of a dimpled sheet in plan view,

Fig. 2

a plan view of a thermoforming sheet after calendering for producing a dimpled sheet according to the invention,

Fig. 3

3 is a cross-sectional view of a knob in two embodiments of a prior art dimpled sheet of uniform wall thickness;

Fig. 4

a cross-sectional view of a knob of a dimpled sheet,

Fig. 5

a schematic cross-sectional view of a napping of a dimpled sheet according to the invention, wherein a material thickening is generated by cooling,

Fig. 6

a cross-sectional view of a nub of a dimpled sheet according to the invention during deep drawing, wherein a material Verdi effect is generated by displacement,

Fig. 7

one of the Fig. 6 corresponding view of another embodiment of a dimpled sheet according to the invention,

Fig. 8

a cross-sectional view of a knob of a dimpled sheet, wherein the material thickening is effected by displacement by a separate mold,

Fig. 9

a cross-sectional view of a thermoforming sheet for a dimpled sheet and

Fig. 10

a cross-sectional view of a knob of a dimpled sheet, the thermoforming film according to Fig. 9 has been produced.

In Fig. 1 a part of a dimpled sheet 1 is shown, which is intended for use as a foundation wall protection or drainage. The dimpled sheet 1 has a flat region 2, which preferably has a substantially constant wall thickness. Furthermore, the dimpled sheet 1 has a multiplicity of studs 3 projecting beyond the flat region 2. The number of nubs per unit area may vary. Usually, more than 50 nubs per m ^{2 are} provided, wherein in principle any value of more than 50 nubs / m ^{2 is} possible. Preferred embodiments are between 1,000 and 10,000 nubs / m ² . Each of the nubs 3 has a knobbed shell 4 and an upper Noppendeckel 5. The height of the knob is usually greater than 2 mm. As a rule, the nub height is between 3 and 20 mm, in the present case it is about 5 mm. With a 5 mm high nub the diameter is usually 6 mm while the diameter of the base is about 8.5 mm. The flank angle is 14 °. However, it is understood that the aforementioned geometry is only one embodiment. Although the nubs shown 3 are frusto-conical, it is understood that the nubs 3 can basically have any geometry. In addition to the truncated cone-like configuration, the knobs, for example, truncated pyramid, round, polygonal, ribbed u. Like. Be formed. The dimpled sheet 1 itself otherwise consists of a plastic material of small wall thickness, which has been produced by deep-drawing.

It is not shown, moreover, that the nubs 3 of the dimpled sheet a water-permeable layer, for example in the form of a drainage fleece or the like. can be applied.

Incidentally, it should be noted that, although not shown, the nub 3 does not necessarily have to have a nub-lid. In principle, it is possible that an opening adjoins the nub shell 4 at the top, the nub cover 5 thus eliminated. Moreover, it is so that the Noppendeckel 5 and / or the flat area 2 need not have a closed surface. Also, a ridge or lattice-like design, i. with through holes, is readily possible.

In Fig. 2 is a thermoforming sheet 6, from which the in Fig. 1 shown dimpled sheet 1 is produced shown. The deep-drawing film 6 itself has been produced from a starting flat film, not shown, of substantially constant thickness. In detail, the thermoforming sheet 6 at preferably all points at which later nubs 3 are formed by deep drawing, annular thickening 7, which have been produced by calendering.

In Fig. 3 is a part of a prior art counting dimpled sheet 1 shown having a flat portion 2 and a plurality of nubs 3. Each nub 3 has a knobbed jacket 4 and a Noppendeckel 5. It is in the left illustration of the Fig. 3 shown that the nubbed jacket has a substantially tapered thickness or material thickness, while in the right representation of a uniform wall thickness or material thickness of the dimpled shell 4 is provided. Moreover, it is pointed out that these are only schematic representations. At the left part of the in Fig. 3 The nub shown is a thermoformed nub 3, wherein the deep drawing results from the top to bottom reducing wall thickness. The in the right part of the in Fig. 3 illustrated embodiment has a substantially constant wall thickness. This knob has been produced by another manufacturing method.

The in the following Fig. 4 to 8 shown nubs 3 correspond in shape from the right in the right part of Fig. 3 However, it is understood that the in the Fig. 4 to 8 nubs shown also the wall thickness of the left part of the in Fig. 3 Although not shown, nubs may have been shown.

In Fig. 4 a part of a dimpled sheet 1 is shown, which does not form part of the invention. The representation according to Fig. 4 corresponds to the illustration according to Fig. 3 , wherein the decisive difference is that the nub 3 has an increased load capacity in its upper nub area 8 with respect to the lower nub area 9. The upper nub area 8 extends over the upper third of the nub 3, while the lower nub area 9 constitutes the middle third and the lower third including the Noppenfußes. At the in Fig. 4 1, the upper nub area 8 and specifically a circumferential annular area 10 at or below the transition from the nubbed jacket 4 to the nub cover 5 is designed as an area of increased carrying capacity, so that higher loads can be absorbed in this area. This is at the in Fig. 4 embodiment shown realized in that in this area a secondary raw material is provided with a yield strength which is greater than the yield strength of the main raw material in the lower nub area 9 or in the flat area 2 or 5 Noppendeckel. Although it would be possible in principle, the secondary raw material with the higher yield strength also provide partial or full surface in the area of the knob cover 5, it is on the one hand both under strength and cost aspects cheaper to provide the secondary raw material only in the ring portion 10 of the nub 3. Moreover, it is at the in Fig. 4 illustrated embodiment so that both the ring area 10 as well as the remaining areas of the nub 3 and also the flat area have a constant wall thickness, although this is not necessarily required.

Furthermore, in Fig. 4 exemplified the longitudinal direction L of the knobbed shell 4. To increase the carrying capacity of the nub 3 is present in the example of the embodiment according to Fig. 4 provided that the polymer chains of the plastic of the dimpled sheet 1 extend from their main direction forth in the longitudinal direction L of the knobbed mantle. It should be noted that this embodiment can be basically provided with pre-oriented polymer chains, in the embodiment according to Fig. 4 however, it does not have to be provided.

In the Fig. 5 to 7 each knobs 3 are shown by dimpled sheets 1, wherein the region of increased compressive strength and in particular the annular region 10 are each thickened relative to the lower nub region 9. The thickening is in each case formed as a circumferential annular bead 11. In the embodiments of the Fig. 5 and 6 in each case an outer annular bead 11 is provided, while in the embodiment according to Fig. 7 an inner annular bead 11 is provided. In the embodiment according to Fig. 8 the annular bead is provided as a projecting area following the Noppendeckel 5.

Hereinafter, various alternatives for producing a dimpled sheet 1 are shown based on the individual representations.

As has already been mentioned, the dimpled sheet 1 is produced from a thermoforming sheet 6 by deep-drawing, wherein deep-drawing takes place in the thermoforming process, although a cold thermoforming is possible. The production of in Fig. 4 shown dimpled sheet 1 is carried out such that in the production of the relevant starting flat film or calendering the main raw material in the load range of secondary raw material is added with the higher yield strength. The load area designates the ring area 10 at the transition from the studded jacket 4 to the nub cover 5. The deep-drawing film 6 produced in this way is then made into a dimpled sheet 1 using a conventional thermoforming tool Fig. 4 deep-drawn.

In the Fig. 2 thermoforming film 6 shown already has before the thermoforming process by calendering thick spots or thickenings 7, wherein Embossing mass is accumulated annularly on the load area. Subsequently, the thermoforming sheet 6 according to Fig. 2 be deep-drawn in a conventional thermoforming tool to a dimpled sheet 1.

In Fig. 5 a method is shown schematically, wherein the thermoforming sheet 6 is cooled before deep drawing in the load area. The cooling takes place via an air flow 12, wherein the supplied air is selectively supplied through a mask 13 to the load area. By cooling in the load area results in a reduction in plasticity, and it is deducted less mass during the thermoforming process from this zone than from the warmer areas. As it turns out otherwise Fig. 5 shows, the point of the maximum thickness of the annular bead 11 to an upper third of the upper nub area 8, but well below the Noppendeckels. 5

In the in the 6 and 7 In the embodiment shown, the annular bead 11 is produced in the last phase of the deep-drawing process, while the deformed plastics material is sufficiently plastic, with the deep-drawing tool, namely the upper punch 14 and the lower punch 15. In this case, melt is displaced from the lower nub area 8 and / or the Noppendeckel 5 in the upper nub area 8. In the embodiment according to Fig. 6 the lower punch 15 is conical, while the upper punch 14 at least substantially corresponds to the negative shape of the lower punch 15. However, a peripheral recess 16 is provided in the upper region of the upper punch 14, which constitutes the receiving or collecting space for the displaced material and allows the production of the annular bead 11.

Moreover, it is understood that instead of the illustrated embodiment according to Fig. 6 It is also possible to provide on at least one of the end regions 17, 18 of the upper punch 14 and / or the lower punch 15 a planar projection to displace material from the central region of the knob cover 5 outwardly in the direction of the annular bead 11.

The embodiment according to Fig. 7 differs from the embodiment according to Fig. 6 only in that the recess 16 is provided on the lower punch 15 and not on the upper punch 14. This results in an inner annular bead 11th

In Fig. 8 is shown that a mold with an upper punch 19 and a lower punch 20 is used to displace melt or material from the Noppendeckel 5 to the outside, so that an outer circumferential annular bead 11 in the loading area, ie in the transition from the lid to Side panel results.

In Fig. 9 a thermoforming sheet 6 is shown which is two-layered and has a first layer 25 and a second layer 26. Both layers have the same layer thickness in the initial state, but this is not necessarily required. Both the one and the other layer can basically be thicker. The material of the first layer 25 has a greater melt viscosity and, in the present case, also a greater yield strength than the material of the second layer 26.

Fig. 10 shows a part of a thermoforming film according to Fig. 9 Deep-drawn dimpled sheet 1. A nub 3 of the dimpled sheet 1 is in Fig. 10 shown. Due to the different material properties and in particular the different melt viscosity results in deep drawing a different flow behavior of the material of the first layer 25 and the second layer 26. The high melt viscosity of the material of the first layer 25 causes a comparatively large layer thickness is present in the region of the knob cover , which decreases in the region of the knobbed jacket 4 with a relatively large taper downwards. In contrast, the taper in the material of the second layer 26 is considerably lower. The material thickness decreases less conical. In the flat region 2, the material thickness of the second layer 26 is greater than that of the first layer 25.

Claims (19)

1. A dimpled sheet (1), in particular for construction purposes, and preferably for use as a foundation wall protection or drainage sheet, having a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein at least one dimple (3) has in the upper dimpled area (8) thereof a beaded rim projecting beyond an area directly adjacent thereto such that an area having increased load capacity is created, wherein the area of increased load capacity is embodied annularly in an annular area (10) at the dimpled jacket (4),
   characterized in that
   the width of the annular area (10) is between one sixth and one third of the height of the dimple (3).
2. The dimpled sheet (1), in particular for construction purposes, and preferably for use as a foundation wall protection or drainage sheet, having a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein at least one dimple (3) has in the upper dimpled area (8) thereof a beaded rim projecting beyond an area directly adjacent thereto such that an area having increased load capacity is created,
   characterized in that
   the wall thickness of the dimpled jacket (4) essentially continuously increased in the direction of the dimpled cover (5).
3. The dimpled sheet according to claim 2, characterized in that the area of the increased load capacity is provided in the upper half, preferably in the upper third of the dimple (3), and in particular below the upper end of the dimpled jacket (4).
4. The dimpled sheet according to claim 3, characterized in that the area of the increased load capacity is embodied annularly in an annular area (10) at the dimpled jacket (4).
5. The dimpled sheet according to claim 4, characterized in that the width of the annular area (10) corresponds to at least one eighth of the height of the dimple (2), preferably between a sixth and a third of the height of the dimple (3).
6. The dimpled sheet according to claims 4 or 5, characterized in that the secondary material having the higher tension yield point is provided merely in the annular area (10) of the dimple (3).
7. The dimpled sheet according to one of the previous claims, characterized in that the beaded rim is embodied as a circumferential annular rim (11).
8. The dimpled sheet according to one of the claims 1 or 7, characterized in that the wall thickness of the dimpled jacket (4) is consistent, or essentially continuously increases in the direction of the dimpled cover (5).
9. A method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that for the production of the deep drawing film (6) slubs are applied in areas onto a base flat film of essentially consistent thickness, and that the slubs are applied onto such zones, in which dimples (3) are deep-dawn, and which form after the deep-drawing process the upper dimpled area (8), and in particular an annular area (10) in the upper third of the dimple (3) at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
10. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that after the deep-drawing of the deep drawing film (6) slubs are attached onto the upper dimpled area (8), and in particular onto the annular area (10) in the upper third of the dimple (3) at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
11. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that for the production of the deep drawing film (6) a base flat film of essentially consistent thickness is calendered such that slubs (7) are created in areas by means of the accumulation of mass, and that the slubs (7) are created at such zones, at which dimples (3) are deep-drawn, and form after the deep drawing process the upper dimpled area (8), and in particular an annular area (10) in the upper third of the dimple (3) at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
12. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that for the production of the deep drawing film (6) a base flat film of essentially consistent thickness is cooled in areas, and that such zones are cooled, at which dimples (3) are deep-drawn, and form after the deep drawing process the upper dimpled area (8), and in particular an annular area (10) in the upper third of the dimple (3) at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
13. The method according to claim 12, characterized in that the cooling of the zones is carried out by means of blowing with air, and that preferably the air supply to the cooling zones is carried out via a mask (13) or via a multitude of individual nozzles.
14. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that for the production of the deep drawing film (6) a base flat film of essentially consistent thickness is heated in areas, and that only such zones are heated, which after the deep drawing process form the lower dimpled area (9).
15. The method according to claim 14, characterized in that the heating of the zones is carried out by means of a radiant heater or blowing of heated air, wherein preferably the air supply to the heating zones is carried out via a mask (13) or via a multitude of individual nozzles.
16. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that during the deep drawing process sheet material is being displaced from the lower dimpled area (9), and/or the dimpled cover (5) into the upper dimpled area (8), and in particular into the annular area (10) in the upper third of the dimple (3) at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
17. The method according to claim 16, characterized in that the sheet material is being displaced in an exterior and/or in an interior beaded rim (11).
18. The method for the production of a dimpled sheet (1) according to one of the claims 1 to 8, in particular for construction purposes, in the deep drawing method, wherein the dimpled sheet (1) has a plane area (2) and a plurality of dimples (3) projecting beyond the plane area (2), having a dimpled jacket (4), and optionally a dimpled cover (5), wherein the dimpled sheet (1) is produced from a deep drawing film (6), characterized in that after the deep drawing process sheet material is being displaced from the dimpled cover (5) toward the exterior such that a beaded rim (11) is created at or below the transition from the dimpled jacket (4) to the dimpled cover (5).
19. Method according to claim 18, characterized in that the displacement is carried out via a die, while the dimpled sheet (1) is still located on the lower die (15) of the deep drawing mold, or that the displacement is carried out exterior of the deep drawing mold via a forming tool having an upper die (19) and a lower die (20).

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