DE102005058983B4 - A base assembly and method of making a base assembly - Google Patents

Abstract

The present invention relates to a low-wear underlay arrangement (1), in particular for the production of precast concrete parts, which consists of an at least one-layer core section (2) which is surrounded on all sides by a highly wear-resistant protective layer (3), the core section (2) arranged spacer elements (4) are embedded in the protective layer (3).

Description

The The invention relates to a base assembly, in particular for production of precast concrete products, and a corresponding procedure.

such Underlay arrangements are for example in the form of so-called Concrete underlay boards known. They are currently made of wood, where different types of wood such as fir / spruce / pine and various tropical wood be used. These boards are available in many different ways Dimensions. Their construction can be layered with glue, with or without tongue and groove, with reinforcements u. Like. Be formed.

The German Utility Model 90 17 200 U1 discloses a base board, especially for the production of concrete products, which essentially consists of thermoplastic-containing plastic waste Plasticizing and extruding or pressing the thermoplastic Plastic component is made. Here are in the range of peripheral zones of the board body reinforcing pipes or rails embedded.

The German Auslegeschrift DE 11 19 503 A discloses a method for producing articles coated with castable plastic, in which a wood core is inserted into a hollow mold corresponding to the article to be produced and supported by spacers made of the same plastic.

Concrete production boards be used in the production and storage of precast concrete parts, such as for example paving stones, hollow blocks, curbs u. the like., used. They are a high wear and different conditions Witterungsbedingun exposed. The wood-based material can also be susceptible to different wood pests, causing its by the above mentioned Wear on 4 to 8 years limited life is further reduced, whereas a required service life of more than 10 years is required is.

Farther is by the applied to such underlay arrangements Weight loads of the concrete material during production and storage as well as by vibration devices in the production of such Underlay arrangement with a corresponding bending stiffness to Mistake.

Farther is the surface the underlay arrangement for the quality the concrete products of particular importance.

It are known concrete underlay boards, which are made of plastic with metal reinforcement rails are. For this purpose, a Thermoplastrecyklat of plastics is used. It has proved to be disadvantageous that often a missing connection to the metal reinforcements and a low impact resistance of the thermoplastic to break the board. Furthermore, the leads low bending stiffness for deflection. This will change the outer shape of a concrete part produced thereon, since the backing board forms part of the production form of the concrete part.

When Other disadvantages are the weight of such a board made of thermoplastic with metal reinforcements, as well as strong cement slurry adhesion to call.

The Object of the present invention is therefore a Unterlagsanordnung and to provide a method of manufacturing a base assembly, which no longer has the above disadvantages and other advantages offers.

The Task is according to the invention with the features of the protection claim 1 and a method with the features of Protection claim 11 solved. Preferred further embodiments of the invention are in the following claims specified.

The Underlay arrangement according to the invention from a core section with a protective covering completely surrounding it wear resistant Made of plastic. This results in a relation to the The prior art smoother, harder and tougher Surface.

Especially advantageous is the core portion of the base assembly made of wood produced, with its good properties to the required flexural rigidity contribute. An additional one Advantage is the cost-effective Price of the wood core. This core section of wood is from the Plastic layer completely enclosed, thereby preventing the wood from penetrating moisture and wood pests is protected. The required service life of over 10 years with more consistent smooth surface is thus achieved advantageous.

A underlay arrangement according to the invention, in particular for the production of precast concrete elements, consists of a at least one-layered core section, the one side of a highly wear-resistant Protective layer is enclosed closed, being on all sides of the Core section arranged spacer elements in the protective layer are embedded, and wherein the spacer elements formed as nails are.

For keeping the core portion in a mold in which the protective layer is applied in a casting process, the core is provided section on all sides spacer elements, which are embedded in the protective layer. This makes it particularly easy to introduce the core section into the mold without further aids.

To it is appropriate that the length the spacers outside of the core portion orthogonal to the respective side surface of the Core portion of the thickness of the protective layer corresponds.

The Nails can either made of metal or metal with caps made of plastic or even completely made Plastic be formed. This is an advantageous density wrapping the protective layer possible, whereby the penetration of moisture is prevented.

It It is advantageous that the spacer elements on the core section distributed regularly are arranged, as a result of a correct insertion of the core section in the mold is simply possible. For this purpose, it is provided in a preferred embodiment that the Spacer elements in a controllable penetration depth in the Core section are introduced.

Especially It is advantageous that the spacer elements with a limiting element provided to limit their penetration into the core section because of such a simple and controlled introduction of the spacers possible is. The spacer element can also be designed with a wide nail head, where the displacement forces in the form do not cause can, that the nail head penetrates uncontrollably into the wood core and the layer thickness of the protective layer is too thick or too thin.

A further preferred embodiment provides that the core section of a wood material and the Protective layer consists of a plastic, with particular preference is that the plastic is a pourable PU plastic. Of the PU plastic has the advantage over a thermoplastic recyclate that he is a harder, tougher and more resistant witterungsbeständigere surface the Unterlagsanordnung forms, at the same time better wear properties and thus has a better separation to the concrete material. Also is a consistent quality of the plastic ensures because it is not a recycle. The wood material possesses advantageously a 14 times higher Flexural rigidity as the recycle.

One On the one hand, another advantage is that the invention is a across from the state of the art by the small proportion of plastic about the half having reduced weight, which is also evident, for example, in handling, Storage and transport advantageous effects.

• (a) Erstellen eines Kernabschnitts mit wenigstens einer Schicht;
• (b) Versehen aller Seiten des Kernabschnitts mit Abstandselementen zur Abstandseinstellung in einer Gießform (7); und
• (c) Herstellen der Unterlagsanordnung durch Anordnen des mit den Abstandselementen versehenen Kernabschnitts in der Gießform und durch Anfüllen der Gießform mit einem Gießwerkstoff zum vollständigen Ummanteln des Kernabschnitts.

An inventive method for producing a base assembly comprises the following method steps:

• (a) creating a core section with at least one layer;
• (b) providing all sides of the core portion with spacer elements for spacing adjustment in a mold ( 7 ); and
• (c) forming the backing assembly by disposing the core portion provided with the spacer elements in the casting mold and filling the casting mold with a casting material to completely encase the core portion.

hereby a concrete underlay board becomes particularly advantageous simply and economically produced. The production time is important with about 5 minutes less than in the prior art with about 1 hour. It turns out due to a low plastic content much lower Production costs.

It It is advantageous that the protective layer of a castable plastic is produced, since thus in the mold for this plastic more design options easy to execute are. The plastic is highly reactive. The design options refer to the surface design and pouring of fasteners and other adaptation parts.

Further Details of the invention are described in the drawings with reference to a schematically illustrated embodiment described.

in this connection demonstrate:

1 a sectional partial perspective view of an embodiment of the inventive arrangement;

2 a cross-sectional view for the production of the embodiment according to 1 ;

3 a first embodiment of a spacer element;

4 a second embodiment of a spacer element; and

5 a third embodiment of a spacer element

Same Reference numerals in the individual figures designate the same or functionally corresponding parts and / or assemblies.

1 shows an embodiment of a base assembly 1 in a partially cut and broken perspective view. One core section 2 is from a protective layer 3 completely surrounded.

The core section 2 consists of two layers in this example 5 and 6 , which are made of a wood material. The layers 5 and 6 are firmly connected to each other, for example by gluing and form the rigid board or plate-shaped core section 2 , Of course, other constructions are the core section 2 possible, such as one or multi-layered version.

All pages of the core section 2 are with spacers 4 stocked. Their arrangement is carried out regularly with preferably the same length, which is measured from the respective side surface to the outside. These spacers 4 are completely in the protective layer 3 embedded. The spacers 4 will be described in more detail below.

The protective layer 3 consists of a plastic that is castable. For coating the core section 2 with the protective layer becomes the core section 2 in a mold 7 introduced, as in 2 shown in a sectional view.

Here are the spacers 4 as a spacer to the insides of the mold 7 , whereby no further spacers are required and the insertion process is particularly simple and easy.

The castable plastic is poured into the mold 7 filled after it has been closed, and covers the core portion and the spacers 4 completely, the plastic being the protective layer 3 forms. The spacers 4 prevent movement when pouring the plastic and when curing. After curing, the mold becomes 7 opened and removed the finished base assembly. The entire process takes about 5 minutes and is the size of the core section 2 and the nature of the plastic depends on the protective layer.

The protective layer 3 may for example be of a polyurethane plastic (PU), which has a particularly good wear and surface property. This allows the on the underlay arrangement 1 manufactured and stored concrete parts are easily solved by him. Furthermore, the PU plastic has an advantageous good separation properties with respect to cement slurries.

The protective layer 3 has a thickness of about 3 mm in this example. By another, not shown embodiment of the mold 7 it is advantageously possible, the protective layer 3 with additional training or insert parts such as pouring nuts and ribs to provide.

3 to 5 show exemplary embodiments of different spacers 4 , In 3 and 4 is that the spacer element 4 surrounding protective layer 3 partially shown with.

Here, the spacer elements 4 usual metal nails, with a suitably shaped head ( 3 ) or their upper ends with a cap 8th are covered ( 4 ). 3 shows a first embodiment, wherein the spacer element 4 a common nail with a semicircular head is. The half-round head is designed to have a lower surface resting on the core portion 2 rests, wherein a penetration depth of the spacer element 4 in the core section 2 is fixed. The surface of the semicircular head is of the protective layer 3 surrounded, with only a small area of the top with the surface of the protective layer 3 flees. The height of the half-round head corresponds to the thickness of the protective layer 3 ,

4 shows a second embodiment in which the spacer element 4 a simple pen is on top of a cap 8th is attached. The purpose of this cap 8th is that no metal surface in the protective layer 3 is visible, which prevents moisture from entering. The cap 8th surrounds the head completely in this example. For example, other head shapes may be clipped on the head.

In both examples 3 and 4 The upper surfaces of the caps are aligned 8th with the surface of the protective layer 3 ,

It is also possible to use the spacer elements 4 Made of plastic, with the caps 8th can be omitted.

In 5 is a spacer 4 in the form of a nail, showing a first section 9 which is from the surface of the core portion 2 protrudes, and with his head 10 , which may be for example made of plastic or coated with plastic, the distance of the core portion 2 to the respective inner wall of the mold 7 sets.

Furthermore, the spacer element 4 a second section 11 with a tip in the core section 2 is introduced. It is advantageous in this case that the spacer element 4 a boundary element 12 that has the first section 9 from the second section 11 separates. When introducing the spacer 4 in the core section 2 the second section penetrates 11 with its tip in the core section 2 until the limitele ment 12 on the surface of the core section 2 rests and a through the length of the first section 9 fixed distance to the respective inner surface of the mold 7 for all spacers 4 is complied with.

The The invention is not limited to the examples described. It can numerous modifications are made within the scope of the appended claims.

So it is possible, for example, that the spacer element 4 in one piece with a layer 5 . 6 of the core portion are formed.

Furthermore, it is conceivable that the penetration depth of the spacer elements 4 is set automatically by a corresponding insertion device.

At core sections 2 Made of certain types of wood, it is advantageous, this according to the material of the protective layer 3 pretreated to obtain optimum adhesion of the protective layer on the core section.

At a spacer 4 in execution as a metallic nail, it is also possible to use the cap 8th to perform as encapsulation of plastic.

1

subject arrangement

2

core section

3

protective layer

4

spacer

5

First layer

6

Second layer

7

mold

8th

cap

9

first section

10

head

11

second section

12

limiting element

Claims (15)

Underlay arrangement ( 1 ), in particular for the production of precast concrete parts, consisting of an at least single-layered core section ( 2 ), which on all sides of a highly wear-resistant protective layer ( 3 ) is closed, where on all sides of the core section ( 2 ) arranged spacer elements ( 4 ) in the protective layer ( 3 ) are embedded, and wherein the spacer elements ( 4 ) are formed as nails or pins. Underlay arrangement ( 1 ) according to claim 1, characterized in that the length of the spacer elements ( 4 ) outside the core section ( 2 ) orthogonal to the respective side surface of the core portion ( 2 ) the thickness of the protective layer ( 3 ) corresponds. Underlay arrangement ( 1 ) according to claim 1, characterized in that the material of the nails is plastic. Underlay arrangement ( 1 ) according to claim 1, characterized in that the nails with caps ( 8th ) are made of plastic. Underlay arrangement ( 1 ) according to one of claims 1 to 4, characterized in that the spacer elements ( 4 ) on the core section ( 2 ) are distributed regularly. Underlay arrangement ( 1 ) according to one of claims 1 to 5, characterized in that the spacer elements ( 4 ) in a controllable penetration depth in the core section ( 2 ) are introduced. Underlay arrangement ( 1 ) according to one of claims 1 to 6, characterized in that the spacer elements ( 4 ) with a limiting element ( 12 ) for limiting its penetration into the core section ( 2 ) are provided. Underlay arrangement ( 1 ) according to one of claims 1 to 7, characterized in that the core section ( 2 ) made of a wood material and the protective layer ( 3 ) consists of a plastic. Underlay arrangement ( 1 ) according to claim 8, characterized in that the plastic from which the protective layer ( 3 ), is a pourable PU plastic. Underlay arrangement ( 1 ) according to one of claims 1 to 6, characterized in that the protective layer ( 3 ) is weather resistant. Method for producing a base arrangement according to one of Claims 1 to 10, with the following method steps: (a) Creating a core section ( 2 ) with at least one layer ( 5 . 6 ); (b) providing all pages of the core section ( 2 ) with spacers ( 4 ) for distance adjustment in a casting mold ( 7 ), wherein the spacer elements ( 4 ) are formed as nails or as pins; and (c) making the underlay assembly ( 1 ) by placing it with the spacer elements ( 4 ) core section ( 2 ) in the mold ( 7 ) and by filling the mold ( 7 ) with a casting material for completely covering the core section ( 2 ). A method according to claim 11, characterized in that in step (a) according to creating the core section ( 2 ) whose sides are pretreated for wrapping with a plastic. A method according to claim 11 or 12, characterized in that in step (b) the spacer elements ( 4 ) in even distribution on the core section ( 2 ) to be ordered. Method according to one of claims 11 to 13, characterized in that in step (b) the spacer elements ( 4 ) with a predetermined penetration depth on the core section ( 2 ) are applied. Method according to one of claims 11 to 14, characterized in that as material for the core section ( 2 ) Wood material and as a casting material for encasing the core section ( 2 ) a weather-resistant PU plastic is used.