EP2337660B1 - Bed plate for placement of products during the manufacture thereof and for storing the same in a shelf or the like - Google Patents

Abstract

The invention relates to a bed plate for placement of products during the manufacture thereof and for storing the same in a shelf or the like. In order to create a bed plate in which the weight and thickness of the plate is reduced while at the same time meeting all mechanical and climatic requirements, wherein the manufacturing costs of the plate are also substantially reduced in comparison to conventional plates, and the costs involved with the manufacture of a system using said plates turn out to be lower, the bed plate (13) comprises two equal plate sections (14) that are mutually disposed one on top of the other and connected together. Each plate section (14) comprises a flat, closed side (15) on one side and on the other side comprises a structure (16) that has a plurality of depressions (17) and a plurality of protruding lugs (18). After the two plate sections are mutually placed onto one another and connected, the protruding lugs (18) of one plate section (14) engage in a form fit with the recesses (17) of the other plate section (14). In the process, the flat, closed sides (15) of the plate sections (14) form the top (19) and the bottom (20) of the bed plate (13).

Description

The invention relates to a base plate for supporting products during their production and for storage thereof in a shelf or the like., According to the preamble of claim 1.

Such backing plates are e.g. in the manufacture of concrete products such as paving stones, curbs, bricks, etc. needed. I.d.R. Plates of different sizes (about 700 x 700 mm to 1500 x 1500 mm) used. The plates are fed by means of a conveyor belt of a molding plant. Subsequently, the concrete products corresponding forms are placed on the plates and filled with the material (concrete). Thereafter, and also during the filling, the entire material to be compacted is shaken and thereby subjected to high frequencies (up to 50 Hz). High accelerations have an effect on the entire system, whereby a static load also acts through the mold pressure.

After compacting the material, the molds are removed and the plates with the compacted products are transferred to a drying rack. Here, the drying (curing) of the material takes place, the drying time is usually 24 hours. Depending on the product height, up to 40 plates can be stacked in the drying shelves. Subsequently, the finished products are transferred from the plates to stacking pallets. Then the plates are cleaned, turned over and, if no further direct use of the plates is provided, stacked and stored.

The plates have on the one hand a supporting function. On the other hand, the vibration energy must be transferred to the material to be compacted as completely as possible during the compaction by the vibration below the plate. In addition, at a maximum load of approx. 800 kg / m ² , the plates must not exceed a deflection of 3 mm in their center, even after a drying time of 24 hours. This is due to the width or length of the concrete products, which may break due to the bending or due to the deflection, the dimensional accuracy not comply.

Other important aspects are air humidity, which can be up to 100%, as well as outside temperatures of up to 70 ° C.

There are currently three types of plates, all of which are solid. On the one hand, these are steel plates with a thickness of 12-16 mm. On the other hand, the plates may be made of hard or softwood, which may also be formed as composite systems with a glued tongue and groove connection and with a plastic coating and have a thickness of 50 - 60 mm. The wood panels can also, as in the DE 10 2006 005 011 A1 described on the top and bottom of each have at least one steel sheet as a pillar skin. Third, plastic plates are known, which are partially reinforced by a metallic support frame and have a thickness of 60 mm.

All panels have to meet geometric requirements in terms of height, length and width tolerances.

Considering the requirements such as static and dynamic loading and above all climatic conditions such as high humidity and temperatures up to 70 ° C, these are only fully met by massive steel plates, since the mechanical properties of the steel are constant in wide temperature ranges. The plastic panels meet the climatic conditions with regard to moisture resistance. Maintaining the mechanical stability at higher temperatures is achieved here by the reinforcement by means of the steel frame. Solid wood panels fulfill the mechanical properties, but lose their geometry due to moisture absorption. To prevent this, they are often covered with a plastic layer.

A disadvantage of these plates is, inter alia, that a certain minimum thickness is required by the requirements imposed depending on the material used. Accordingly, the weight of the solid plates is between 90 kg (wooden plates) and 180 kg (steel plates). This means that the system components, especially conveyor belts and drying systems, must be dimensioned accordingly, which in turn leads to higher system costs. The use of different materials also determines the service life of the plates. Steel plates usually last longer (up to 15 years) than plastic plates (up to 10 years), which in turn last longer than wooden plates (up to 6 years). US-A1-2008 / 0178775 discloses a base plate for supporting articles according to the preamble of claim 1.

The invention is therefore an object of the invention to provide a base plate of the specified genus, in which at the same time meeting all mechanical and climatic requirements on the one hand the weight and on the other hand, the thickness of the plate is reduced, in addition, the manufacturing cost of the plates Compared to conventional plates are substantially reduced and also the cost of producing a plant working with the plates are lower.

This object is achieved by a base plate with the characterizing features of claim 1.

Advantageous developments of the invention are characterized in the subclaims.

Fig. 1

schematisch ein erstes Ausführungsbeispiel einer Unterlagsplatte,

Fig. 2

schematisch die Unterlagsplatte nach Fig. 1 in Sprengdarstellung;

Fig. 3

schematisch ein zweites Ausführungsbeispiel einer Unterlagsplatte,

Fig. 4

schematisch die Unterlagsplatte nach Fig. 3 in Sprengdarstellung,

Fig. 5

einen Teilschnitt durch ein drittes Ausführungsbeispiel einer Unterlagsplatte,

Fig. 6

einen Teilschnitt der Unterlagsplatte nach Fig. 5 in Sprengdarstellung,

Fig. 7

einen Teilschnitt eines Plattenteiles der Unterlagsplatte nach Fig. 5,

Fig. 8

eine Ansicht in Richtung des Pfeiles VIII in Fig. 7,

Fig. 9

in Draufsicht die Struktur des Plattenteiles nach Fig. 5 im Eckbereich desselben und

Fign. 10a bis 10e

schematisch unterschiedliche geometrische Formen der Vertiefungen bzw. Öffnungen und/oder der Ansätze.

Advantages of the invention will become apparent from the following description with reference to the invention reproducing and illustrated in the drawings embodiments. It shows

Fig. 1

schematically a first embodiment of a base plate,

Fig. 2

schematically the underlay plate after Fig. 1 in exploded view;

Fig. 3

schematically a second embodiment of a base plate,

Fig. 4

schematically the underlay plate after Fig. 3 in blasting,

Fig. 5

a partial section through a third embodiment of a base plate,

Fig. 6

a partial section of the base plate after Fig. 5 in blasting,

Fig. 7

a partial section of a plate part of the base plate after Fig. 5 .

Fig. 8

a view in the direction of the arrow VIII in Fig. 7 .

Fig. 9

in plan view, the structure of the plate part after Fig. 5 in the corner of the same and

FIGS. 10a to 10e

schematically different geometric shapes of the wells or openings and / or the approaches.

That in the Figures 1 and 2 illustrated first embodiment of a base plate 1 for supporting products during their production and storage of the same in a shelf or the like., Consists of a plate member 2 in which a plurality of preferably the same, the plate member 2 penetrating openings 3 are provided. On the top 4 and the bottom 5 of the plate member 2, a flat, closed cover layer 6 is applied in each case and connected to the same.

In the in the FIGS. 3 and 4 The second embodiment of a base plate 7, which is shown in FIG. 2, consists of two identical, mutually superimposed and interconnected plate parts 8, each plate part 8 having a flat, closed side 9 on the one hand and a plurality of depressions 10 on the other hand. After the mutual juxtaposition and joining of both plate parts 8, the flat, closed sides 9 of the plate parts 8 form the upper side 11 and the lower side 12 of the underlay plate 7.

The FIGS. 5 to 9 show a third embodiment of a base plate 13 according to the invention, which also consists of two identical, mutually superimposed and interconnected plate parts 14. In this case, each plate member 14 on the one hand also on a flat, closed side 15 and on the other hand, a structure 16 which consists of a plurality of recesses 17 and a plurality of protruding lugs 18. The projecting lugs 18 of a plate member 14 engage after the mutual juxtaposition and joining of both plate members 14 in the recesses 17 of the other plate member 14 form-fitting, wherein the flat, closed sides 15 of the plate members 14, the top 19 and the bottom 20 of the base plate thirteenth form.

For centering of both plate members 14 in mutual assembly and further increase the stability of the base plate 13, the recesses 17 and the protruding projections 18 are conical, with 18 further recesses 21 are provided or molded to save weight in the above approaches.

Preferably, all the base plates 1, 7, 13 and the plate parts 2, 8, 14 and the cover layers 6 made of plastic, which may be formed naturally and / or synthetic fiber reinforced.

The joining of the plate part 2 with the flat, closed cover layers 6, the two plate parts 8 with each other or the plate parts 14 with each other can be done for example by gluing, welding or other methods of joining and / or connection technology.

As in the FIGS. 10a to 10e shown, the openings 3 of the base plate 1 and the plate member 2 after the FIGS. 1 and 2 , the recesses 10 of the base plate 7 and the plate parts 8 after the FIGS. 3 and 4 and the recesses 17 and lugs 18 of the base plate 13 and the plate parts 14 after the Fig. 5 to 9 have different geometric shapes. For example, these honeycomb ( Fig. 10a ), triangular ( Fig. 10b ), rectangular ( Fig. 10c ), circular ( Fig. 10d ), elliptical (not shown) or diamond-shaped ( Fig. 10e ) be formed. Of course, other geometric shapes as well as mixed geometric shapes are possible.

The base plates 13 according to the invention are characterized i.a. characterized in that they do not consist of solid material in contrast to the already described conventional backing plates. By the use of plastics and the multiplicity of openings 3 or recesses 21, a tremendous reduction in weight is achieved, as a result of which the molding plants on which the underlay plates 13 are inserted are spared. New molds and shelves can be designed more cost-effective due to lower loads by the weight reduction in their construction.

The special design of the plate parts 2, 8, 14 with the openings 3 and depressions 10, 17, 21 of different geometries ensures a very high stability of the base plates 1, 7, 13 made of plastic, through which at maximum load a maximum deflection in the Center of the backing plates 1, 7, 13 is guaranteed within the required tolerances and also a high life cycle is achieved.

The fact that the base plates 1, 7, 13 and the plate parts 2, 8, 14 are created by extrusion, extrusion, die casting, injection molding or injection compression, production processes can also be made more cost-effective.

A further cost savings through the underlay boards 1, 7, 13 according to the invention is achieved in the transport costs, as u.a. Energy is saved by the weight savings on the base plates 1, 7, 13. During the manufacturing process, additional energy is saved by saving weight.

It goes without saying that the above-described application of the base plates 1, 7, 13 represents only one example. Of course, the base plates 1, 7, 13 can also be used elsewhere.

Claims (9)

1. A bed plate for placement of products during the manufacture thereof and for storing the same in a shelf or the like, wherein the bed plate (13) consists of two equal plate sections (14) that are mutually disposed one on top of the other and connected to each other, wherein each plate section (14) comprises a flat closed side (15) on one side and a structure (16) on the other side, characterized in that said structure has a plurality of recesses (17) and a plurality of protruding lugs (18) and that after the two plate sections (14) are mutually placed onto one another and connected, the protruding lugs (18) of the one plate section (14) engage in a form fit with the recesses (17) of the other plate section (14), and the flat closed sides (15) of the plate sections (14) form the top (19) and the bottom (20) of the bed plate (13), and that further recesses (21) are provided in the protruding lugs (18).
2. The bed plate according to claim 1, characterized in that the recesses (17) and the protruding lugs (18) have a conical shape.
3. The bed plate according to claim 1 or claim 2, characterized in that the recesses (17) and the protruding lugs (18) have honeycombed shape.
4. The bed plate according to claim 1 or claim 2, characterized in that the recesses (17) and the protruding lugs (18) have triangular shape.
5. The bed plate according to claim 1 or claim 2, characterized in that the recesses (17) and the protruding lugs (18) have a rectangular shape.
6. The bed plate according to claim 1 or claim 2, characterized in that the recesses (17) and the protruding lugs (18) have a circular or elliptical shape.
7. The bed plate according to claim 1 or claim 2, characterized in that the recesses (17) and the protruding lugs (18) have a rhombic shape.
8. The bed plate according to any one of the claims 1 to 7, characterized in that the bed plate (13) or, respectively, the plate sections (14) are made of plastic.
9. The bed plate according to claim 8, characterized in that the plastic is natural fiber reinforced and/or synthetic fiber reinforced.

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