DE10047838B4 - Process and device for the application of reactive resin coatings - Google Patents

Abstract

Process for the application of reactive resin coatings, in which two liquid components (a, b) are stored separately, withdrawn in respective selectable amounts and mixed together and then sprayed as a mixture onto the surface to be coated, where it is reacted, d. H. Curing and thus layer formation comes, characterized in that the mixture (5) for the layer-by-layer change of color is sprayed together, if necessary, together with a fabric (c) coloring the subsequent coating.

Description

The invention relates to a method according to the preamble of claim 1. Furthermore, the invention relates to a device according to the preamble of claim 5.

It is a process for the application of reactive resin coatings known in which, if necessary. With heat, two liquid components stored separately from each other, deducted as required in each case selectable amounts and mixed together and then sprayed as a mixture on the surface to be coated, where it is for reaction (Curing) and thus layering comes. It is customary to repeat this process several times in order to arrange several layers (layers) on top of each other, which first ensure a dense and durable coating. The layers are each created in a uniform color. Procedures in this sense can z. B. be taken from the following publications: GB 1 583 882 A . US 5,388,761 A and EP 0 605 137 A1 , Furthermore, in the present context, reference should also be made to DE 197 39 601 A1 which deals with the coloring of plastics using the relevant processes.

The number of layers or the layer thickness achieved and especially their uniformity can only randomly, z. B. over Meßkämme o. Ä. Be checked. The full-surface, gap-free coating required for many reactive resin coatings (eg structural waterproofing) as well as compliance with a minimum layer thickness while optimizing the material consumption can hardly be realized under construction site conditions. Rule on construction sites anyway already unfavorable lighting conditions, so the view in the present case is still deteriorated by spray (with manually guided spray nozzle). To compensate for the resulting work inaccuracies is often worked with high Vorhaltemaßen, which means an extra consumption of material but also time and thus a considerable effort.

This is where the invention begins. It wants to further develop the known method in such a way that even when applying a single layer it becomes visible whether it is applied over the entire surface, in particular fully covers an underlying layer and thus contributes to a layer structure which is permanently effective even with a limited number of layers. The procedure should therefore not be delayed and, moreover, allow ad hoc improvements to be made. In addition, the invention wants to design a known device so that the new method can be carried out efficiently.

This object is achieved with regard to the method with the characterizing feature of claim 1 and with regard to the device with the characterizing features of claim 5. The respective dependent claims are appropriate expedient developments.

The first layer can and could be formed sufficiently safely solely with the aid of the two liquid components, if the color tone of the layer stands out from the ground. So far, with the next layer, the dilemma has arisen that the layers follow each other tone-in-tone and can no longer be distinguished; d. H. were to be controlled during the spraying, the color can now be changed from layer to layer, namely by admixing the respective layer einfärbenden substance. This admixture can even be started in the current injection process as well as terminated so that it needs to come to any interruption.

By changing the hue of the coating in the current injection process, the user (nozzle guide) can spray as many layers of alternating colors in a row and thereby ensure a uniform, full-surface (gapless) coating and control the layer thickness on the number of spraying operations. It comes thereby to increased security with a lower material consumption.

Advantageously, a liquid, and in particular a color concentrate, is chosen as the coloring substance.

The improvements sought by the invention can be achieved in various ways, for example by mixing the coloring liquid with one of the reactive components as needed before it is mixed with the second component.

Preferably, however, the two components and the inking liquid are combined simultaneously and mixed together.

For the device according to the invention, a further storage container is provided for a substance which dyes the subsequent coating, the storage container being connected to the conveying path of a component or the common mixing head via its own metering and conveying means.

Thus, the user (nozzle guide) the hue change immediately during operation according to the conditions on a (body) to be coated body (even with complicated geometric conditions, such as pipe penetrations, edging, etc.) without interruption or even delay. A conversion or other filling of storage containers is namely not required.

Advantageously, the conveying means for the inking substance consist of a conveying path and a feed pump.

Alternatively, the conveying means for the coloring material could comprise a pressure vessel with a conveying path.

Conveniently, valves or pressure switches are provided to control the flow of einfärbendem substance. These can be actuated from the mixing head.

Further details and advantages will be described below in connection with the drawing for a preferred device. Therein, the single figure shows the essential structure of a device according to the invention with the aid of a flow chart.

After the drawing, two reactive liquid components a, b are respectively in storage tanks 1a . 1b kept separate from each other. conveyor lines 2a . 2 B connect the storage containers 1a . 1b with dosing and conveying agents 3a . 3b to which further sections of the conveyor lines 2a . 2 B towards a common mixing head 4 connect with a nozzle. From the latter, the components a and b occur as a mixture 5 in the form of a spray jet. Until then, the device corresponds to a known embodiment.

However, the device according to the invention is a storage container 1c for a coloring substance c, in particular a liquid color concentrate. Analogous to the aforementioned reactive components a and b are also for this a separate conveyor line 2c for connection to own dosing and conveying means 3c and for forwarding to the common mixing head 4 intended.

While components a and b are constantly in the mix 5 are included, the coloring substance c only added when he of the operator of the mixing head 4 for coloring a new layer is desired. To switch on and off the inking substance c pressure switch or valves are provided, which from the mixing head 4 can be operated from what is not shown here.

With the aid of a device according to the invention, it is possible to apply surface-covering layers rapidly and with minimal material expenditure, which already provide a few layers for complete and lasting protection against external influences. The device is suitable for applying multi-layer coatings on a wide variety of objects.

LIST OF REFERENCE NUMBERS

1a

reservoir

1b

reservoir

1c

reservoir

2a

conveyor line

2 B

conveyor line

2c

conveyor line

3a

Dosing and conveying

3b

Dosing and conveying

3c

Dosing and conveying

4

mixing head

5

mixture

a

reactive component

b

reactive component

c

dyeing fabric

Claims (9)

Process for the application of reactive resin coatings, in which two liquid components (a, b) stored separately, withdrawn in each selectable amounts and mixed together and then sprayed as a mixture on the surface to be coated, where it is for reaction, ie curing and thus layer formation comes, characterized in that the mixture ( 5 ) is sprayed, if necessary, together with a fabric (c) coloring the subsequent coating, to change the color in layers. A method according to claim 1, characterized in that the coloring substance (c) one of the components (a, b) is mixed before it is mixed with the second component (a, b). A method according to claim 1, characterized in that the two components (a, b) and the coloring substance (c) are brought together simultaneously and mixed together. A method according to claim 1 to 3, characterized in that as coloring agent (c) a liquid and in particular a color concentrate is selected. Device for the application of reactive resin coatings for carrying out a method according to one or more of the preceding claims, consisting of separate storage containers ( 1a . 1b ) for the components reacting with each other, as well as dosing and conveying means ( 3a . 3b ) for the components (a, b), the funds ( 3a . 3b ) Conveyor lines ( 2a . 2 B ), which lead to a common mixing head ( 4 ), of which the Mixture ( 5 ) is sprayed onto the surface to be coated for curing, characterized in that a further storage container ( 1c ) is provided for a later coating-coloring substance (c), wherein the storage container ( 1c ) via own dosing and conveying means ( 3c ) to the conveyor line ( 2a ; 2 B ) of a component (a; b) or the common mixing head ( 4 ), connected. Apparatus according to claim 5, characterized in that the conveying means for the inking substance (c) from a conveyor line ( 2c ) consist with a feed pump. Apparatus according to claim 6, characterized in that the conveying means for the inking substance (c) a pressure vessel with a conveyor line ( 2c ). Apparatus according to claim 6 or 7, characterized in that valves or pressure switches are provided for controlling the delivery of inking substance (c). Device according to claim 8, characterized in that the valves or pressure switches provided for controlling the delivery rate of inking substance (c) from the mixing head ( 4 ) are actuated.

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