RU2546157C2 - Apparatus for distributing adhesive substance - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: apparatus for distributing an adhesive substance from a synthetic material deposited in a fluid state and solidified thereafter, particularly a polyurethane-based adhesive substance, includes a plurality of transport channels having an outlet opening. The adhesive substance is distributed from a feed channel into a plurality of outlet openings.

EFFECT: invention simplifies application of an adhesive substance on a base, keeps consumption of the adhesive substance as low as possible for a possibly large application surface area without negatively affecting strength of the adhesive joint, reduces time spent on applying the adhesive and improves cost-effectiveness.

25 cl, 9 dwg

Description

The invention relates to a device for distributing an adhesive material of a synthetic material applied in a liquid flow state and cured thereafter, in particular an adhesive agent based on polyurethane.

The invention also relates to the use of a device for distributing adhesive to a substrate.

For the installation of stone walls or masonry, which have plane-parallel supporting or shrink surfaces, cement made with a mineral binder was almost exclusively used before. But recently, alternative bonding materials have begun to be used, for example, organic-based adhesives.

The Austrian patent AT 414333 describes a method for joining flat building stones to create a bond between stones, such as bricks for building a wall, using a connecting material, wherein an expandable synthetic material, in particular polyurethane foam, is used as a connecting material. The expandable synthetic material is then applied either pointwise along at least one line or over an area.

When applied over an area of expandable synthetic material, a high material consumption should be indicated as a disadvantage. The expandable synthetic material, in particular polyurethane foam-based adhesive, is associated with significantly higher costs when using existing cement for joining stones when laying walls, so there is a fundamental tendency to expend adhesive based on polyurethane foam as little as possible. Therefore, when applying an area of adhesive based on polyurethane, attention should be paid to ensure that the layer thickness is as small as possible. Of course, the thickness of the layer may not decrease in any way, since the connecting surfaces of the masonry stones are, as a rule, not absolutely even. Therefore, depending on the quality of the surface of the stones for masonry walls, a minimum layer thickness is needed to even out surface irregularities.

The spot application of a polyurethane-based adhesive or the application along at least one line, although this leads to a reduction in adhesive consumption, has the disadvantage that only a small part of the available connecting surface is used for adhesive bonding, so that the adhesive bonding is stable not in each case will be optimal. Further, there is the disadvantage that building stones are often made in the form of stones for masonry walls with voids, so that, as a rule, already from 30 to 60% of the total surface of the masonry stone can not be used for adhesive bonding. In addition, the profiles defined by the voids formed in the stone for wall masonry made by different manufacturers differ significantly, so a standardized application of glue according to a given pattern of lines or dots would result in a significant part of the applied glue entering the stone cavity.

The application of polyurethane-based adhesives is most often carried out from a storage tank in which the adhesive is under pressure and can escape from it when the metering valve is actuated. To simplify the application of the adhesive, usually to the metering valve, which is most often formed as a flapper valve, an adapter in the form of a pipe can be installed or something like that or the storage tank can be connected to a pistol applicator. Although the use of known applicators or adapters can improve usability, the application speed, however, is not increased to such an extent that the application could be economically justified when connecting building stones. In particular, the distribution of the adhesive over the width of the masonry stone is not possible in a single working pass.

The distribution of the adhesive over a wider area is important not only for masonry stones, such as bricks, silicate bricks, porous concrete blocks, lightweight concrete blocks or the like, but also for other applications, such as for bonding internal or external architectural elements, in particular carpets, parquet, facade elements or thermal insulation elements with a base.

Therefore, the invention is intended to simplify the application of adhesive to the substrate and to keep the flow of adhesive at the largest possible application surface, as low as possible, without adversely affecting the strength of the adhesive. Further in the invention provides a reduction in the time spent on applying glue and increase efficiency.

To solve this problem, the proposed device for applying an adhesive substance of the aforementioned type provides that said device is provided with a plurality of transport channels having an outlet respectively, the adhesive substance from the supply channel being distributed to a plurality of outlet openings.

Due to the fact that the adhesive is distributed over many transport channels, the adhesive can be applied simultaneously through the corresponding many outlet openings, so that the adhesive can be applied with the minimum required “rod” thickness, namely, so that the adhesive can be applied in one the only working passage over the entire width of the application, for example, over the entire width of the stone for masonry walls. Due to this, it is possible to better control the amount of adhesive applied per unit of time, and at the same time keep it at a minimum level, without adversely affecting the resulting adhesion force. Under the many outlet openings in the sense of the invention should be understood as at least three, preferably at least five, outlet openings.

According to the invention, the individual transport channels can be arranged in the sense of flowing in parallel or in series, and a combination of channels in which flow is carried out in parallel and in series is also possible. In the case of parallel flow, it is preferably provided that the device for distributing adhesive material has a distribution section that distributes the adhesive from the supply channel to the plurality of transport channels. In this case, a different arrangement of channels is possible, for example, departing from a star-shaped supply channel or adjacent to a T-shaped distribution section, mainly passing transport channels parallel to each other. In the case of a sequential arrangement, the transport channels are arranged one after another, so that an adhesive is sequentially applied to them.

The outlet openings are preferably arranged along straight lines at a distance from each other, so that many lines of adhesive can be applied simultaneously. The distance of the outlet openings from each other and the output cross-section can be selected in such a way that the adhesive applied to the base, for example, to the surface of the stone for masonry walls, will be distributed as evenly as possible, due to the fact that local accumulations of material are prevented, In general, the consumption of adhesive is reduced.

Since there is an “infringement of interests” caused by leakage in the outlet openings located at a greater distance from the supply channel, the consequent reduced release of adhesive can preferably be compensated by the fact that the flowing cross section of the transport channels with the corresponding outlet outlet farther from the supply channel is larger than flowing cross-section of transport channels with a correspondingly smaller outlet from the inlet anal. With the parallel flow of transport channels, the external transport channels have a larger flow cross-section than the internal transport channels. In the case of sequential flow of transport channels, as an alternative or in addition to the above-mentioned measure, it can be provided that the output cross section of the outlet openings with a greater distance from the inlet channel is larger than the output cross section of the outlet openings with a smaller distance from the supply channel.

Pauses in the work when applying adhesives from the applied in a liquid-flowing state and after this cured synthetic material can lead to the fact that the adhesive hardens in the transport channels, so that further use will be complicated or with longer pauses it will often become even impossible. Due to the fact that the device for distributing the adhesive is preferably formed as a single use item, such problems are eliminated. In this case, a single use item should be a cheap mass-produced product, so that, if necessary, it can simply be removed from the applicator and replaced with a new one. Preferably, it is provided that the device for distributing the adhesive consists of synthetic material.

A particularly economical embodiment of a disposable item according to a preferred improvement is obtained if the disposable item is made of two preferably congruent synthetic films which are welded together to form a distribution section and transport channels. For the manufacture of such a one-time item, it is enough to cut two films, mostly commensurate, and then connect them to each other, for example, using a welding tool, and the welding circuit determines the contour of the distribution section and transport channels. As an alternative, the films are first welded and then, for example, a single use item is stamped. Along with cheap manufacturing, such a one-time item has the advantage of requiring less space for storage and transportation. In addition, it is possible to produce various channel arrangements without cost, for example, leaving in the form of a star from the inlet channel or connected to a T-shaped distribution section, mainly transport channels running parallel to each other.

According to a preferred improvement, it is provided that the outlet openings of the transport channels are closed by welding and can be opened by cutting. Due to this, a single use item can be made of a standard width, and fitting to the correspondingly desired application width in terms of application is carried out by means that the required channels are opened for the desired width, and the remaining channels remain closed.

In the case of manufacturing a device for distributing an adhesive from synthetic films welded to each other, it (the device) with a small film thickness is not self-supporting, but should rest on a support. Therefore, an alternative formation preferably provides that the transport channels are composed of a lower part and an upper part, wherein the lower part and / or the upper part is formed as a self-supporting element. Preferably, the lower part or the upper part can be formed as a self-supporting element, and accordingly, the other part can be formed as a non-self-supporting element. In particular, a lower, respectively, upper part formed as a self-supporting element can consist of a deep-stretched synthetic film or can be made by injection molding. Preferably, the lower, or upper, portion formed as a non-self-supporting member consists of a flexible synthetic film.

Since the adhesive distribution device or transport channels of the adhesive distribution device must be held, a special fixing device is preferably provided. It can be formed, for example, by an adhesive applicator in which a device for distributing adhesive is installed. Preferably, the locking element is intended for transport channels and, if necessary, for the distribution section. Preferably, the locking element has a plurality of locking regions with a correspondingly channel-shaped cross-section for clamping the transport channels.

The channel-shaped cross-sections of the clamps are preferably intended for transport channels, preferably in the form of fingers extending outward from the distribution section. Such channel-shaped cross sections of the clamps facilitate the positioning of the transport channels and, in particular, the outlet openings. In this regard, the holder may have locking elements for the end of the transport channels having an outlet, while a certain position of the outlet is provided. The locking elements can be formed by two cheeks, between which the ends of the transport channels are fixed.

Such a holder for an adhesive distribution device is advantageous in the first place if, as is the case with a preferred development, the adhesive distribution device, at least in the area of the transport channels, consists of a flexible material. The transport channels formed in the device for distributing the adhesive are flexible in this case, and flexibility is given either only to a certain place or along the entire length, so that in any case, the displacement of individual channels can be carried out, so that the outlet openings of the individual transport channels can be positioned adapted to the relevant requirements, for example, they can be positioned to fit the corresponding profile of masonry stone with voids, where the profile has per sliver or something similar, so that is minimized or totally prevented from entering the adhesive into the voids formed between the webs. The holder may have means for fixing the transport channels in a suitably selected position. The fixing means can be formed in such a way that the established positions of the transport channels, respectively, of their outlet openings, after removing the adhesive distribution device, also remain for the newly installed adhesive distribution device, for example, due to the transport channels being installed in channel-shaped guide rails of the holder, which can be fixed with displacement, bending, and deflecting in corresponding positions. In particular, means may be provided for adjusting the distance between the outlet openings of adjacent transport channels.

In principle, without difficulty, various shapes of the cross section of the outlet of the channels can be formed, so that the execution that best meets the requirements can be selected. In particular, the cross section of the exit and, if necessary, transport channels can preferably be round or oval.

According to another aspect, the invention relates to the use of an adhesive dispensing device according to the invention for applying adhesive to a substrate and then gluing an internal or external architectural element, in particular stone for laying walls, carpet, parquet, facade element or thermal insulation element.

A particularly stable adhesive bond can be achieved if, as a preferred development of the invention, the adhesive consists of a fluidly applied and then cured synthetic material, in particular an adhesive based on polyurethane. Polyurethane-based adhesives (PURs) are commercially available as one- or two-component adhesives that can harden through polycondensation or polyaddition. One-component - PUR adhesives harden in humid air. PUR adhesives include diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate and the like. Further contain isomers, homologues or the like. The advantages of PUR glue are not only its simple processing ability, but also its excellent adhesion to various surfaces of the material. Another advantage is that the adhesive material, when applied to the surface of a building stone, penetrates into the pores or cavities (this does not mean special technological voids) of the building stone, in particular hollow bricks, or they can at least partially be closed, thanks to which may decrease thermal conductivity.

Below the invention is explained in more detail using an example implementation, schematically represented in the drawings. They show: figure 1 is a side view of the device for applying glue; figure 2 is a side view of the application device with the installed tank for the adhesive and the inserted device for the distribution of adhesive; figure 3 and figure 4 is a front view of the device for applying according to figures 1 and 2, figure 5 is a first embodiment of a device for distributing adhesive, figure 6 is a second embodiment of a device for distributing adhesive, and figa, 7b and 7c shows various channel formations of a device for distributing adhesive in a cross section.

Figure 1 shows the application device 1, which has a fixing device 2 for the tank with a reserve 3. The fixing device 2 is installed on the main part of the device 1 for applying, and the main part 4 has a handle 5 and a plate holder for a more detailed item 7 single use. A starting device 8 is mounted on the main part 4 with the possibility of rotation around the axis 11, and the drive hook 9 mounted on the starting device 8 drives a metering valve, which, for example, is formed in the form of a butterfly valve.

The proposed device is intended for applying adhesive from the reservoir tank 3 to the surface 12, which in the present example is the surface of a hollow brick. The plate holder 6, on its side facing the surface 12, carries at least two rollers or wheels 13, with which the application device can move on the surface 12. As an alternative, there may be sliding elements, for example skis. Further above the surface 12, guide elements protruding downward are visible, which, when the application device 1 is operated, must be directed along the side walls of the brick, with which the application device is held to the side. In its end region facing the surface 12, the plate holder 6 carries on a schematically indicated sensor device equipped with a large number of spring tongues 15, which, when they meet the jumper of the hollow brick profile, deviate, and a corresponding electric one is also detected from the sensor, for example from the tensometer the signal is routed to a control unit not shown. The control unit adjusts the actuating elements 16, which in this embodiment include electrically driven retractable pistons 17, by means of which the transport channels of the disposable object 7 can be pinched to interrupt the flow of adhesive.

Figure 2 shows a device for applying with a installed reservoir tank 3 and a device for distributing an adhesive formed in the form of a single use item, where it is seen that the supply channel 18 of the single use item 7 is connected to a metering valve 10. The exit ports of the transport channels are designated 19 To apply the adhesive, the application device rolls on rollers or stretches in the direction of arrow 20 along the brick surface 12 and the trigger mechanism is pulled 8. The adhesive through the metering second valve 10 flows into supply channel 18 in the distributor portion 21 and then distributed into a plurality of transport channels 22 and out through respective outlets 19, the transport channel 22 (see FIG. 4). It is essential that the rollers 13 and spring tongues 15 during operation of the application device in the direction of the arrow 20 are ahead of the outlet openings 19, thereby minimizing or preventing contamination of these parts with adhesive.

In Fig.4, the design of the object 7 of single use is better visible. The disposable item 7 has a distribution portion 21 connected to a supply channel 18, from which transport channels diverge in a star shape. It is further seen that each outlet 19 is provided with at least one spring tongue 15 and an actuating element 16, so that individually the flow through the transport channels 22 can be controlled.

Figure 5 shows the device for distributing adhesive in parts shown in figures 2 and 4. The device for distributing the adhesive is made of two proportionate films, which are welded or glued to each other in the edge regions 24 and in the regions 25 between the individual transport channels 22. In this case, the edge regions 24 and the intermediate regions 25 determine the shape of the individual transport channels.

6 shows an alternative embodiment of an apparatus 7 for distributing an adhesive. The supply channel 18 with the distribution section 21 forms a T-shape, with individual transport channels 22 extending from the distribution section 21 in parallel. Figure 6 shows that the disposable item 7 is made of two films, which are welded together with each other to form the supply channel 18, the distribution section 21 and the transport channels 22. In this case, by welding in the manufacture, the outlet openings 19 and / or the filling hole of the supply channel 18 can be closed, so that the holes should be opened during use, for example, using scissors or a knife. Such a knife can also be integrated into the device 1 for applying, so that the holes after applying the subject 7 of a single use when closing with a lid or the like open. The filling hole is preferably provided with a connecting element, for example a thread, with which the disposable item is attached to the metering valve.

Fig.7 shows various embodiments of the transport channels 22 of the device for distributing adhesive in cross section (section along the line VII-VII in Fig.6). The various embodiments of the transport channels 22 shown in FIG. 7 can be implemented both in the device for distributing the adhesive according to FIG. 6 or according to FIG. 7, and in any other implementation. Fig. 7a shows an embodiment in which the upper film 26 is formed into a flat, even film and the lower film 27 is formed by a deep-drawn film. The deep-drawn film 27 is U-shaped so that a transport channel 22 is formed. The place of welding or gluing is indicated by 23.

In the embodiment of FIG. 7b, both the lower film 27 and the upper film 26 are made in the form of a deep-stretched film, respectively, have a U-shape. In the embodiment of FIG. 7c, two flat films 26 and 27 are thus welded together to form a profiled weld 23, which can impart mechanical stability to the adhesive distribution device.

Claims (25)

1. A device for distributing an adhesive from a synthetic material applied in a liquid flowing state and then cured, in particular a polyurethane-based adhesive, having a plurality of transport channels (22) with corresponding outlet openings (19), the adhesive being distributed from the supply channel ( 18) a plurality of outlet openings (19), characterized in that the device for distributing adhesive is made in the form of a single use item. 2. The device according to claim 1, characterized in that it has a distribution section (21) distributing the adhesive from the supply channel (18) to the plurality of transport channels (22). 3. The device according to claim 2, characterized in that the transport channels depart from the star-shaped supply channel. 4. The device according to claim 2, characterized in that the transport channels pass mainly parallel to each other and are connected to a T-shaped distribution section. 5. The device according to claim 1, characterized in that the transport channels are located one after another, so that the adhesive passes through them sequentially. 6. The device according to claim 1, characterized in that it consists of a synthetic material. 7. The device according to claim 1, characterized in that the outlet openings (19) of the transport channels are located along straight lines. 8. Device according to any one of claims 1 to 7, characterized in that the transport channels (22) are flexible. 9. The device according to any one of claims 1 to 7, characterized in that it, at least in the field of transport channels (22), consists of a flexible material. 10. Device according to any one of claims 1 to 7, characterized in that it is made of two preferably proportionate synthetic films, which are connected to each other, in particular, welded, to form a distribution section (21) and transport channels (22). 11. The device according to claim 10, characterized in that the outlet openings (19) of the transport channels (22) are closed by welding and can open when cut. 12. The device according to claim 1, characterized in that it preferably has a threaded connecting element for fastening, respectively, for connection with a butterfly valve. 13. The device according to any one of claims 1 to 7, 11, 12, characterized in that the flowing cross-section of the transport channels with a large distance of the corresponding outlet from the inlet channel is formed larger than the flowing cross-section of the transport channels with a smaller distance of the corresponding outlet from inlet channel. 14. The device according to claim 1, characterized in that the outer transport channels have larger flow cross-sections than the internal transport channels. 15. The device according to claim 1, characterized in that the transport channels are formed from the lower part and the upper part, and the lower part and / or upper part is formed as a self-supporting element. 16. The device according to p. 15, characterized in that the lower part or upper part is formed as a self-supporting element and, accordingly, the other part is formed as a non-self-supporting element. 17. The device according to p. 15 or 16, characterized in that the lower, respectively upper, part formed in the form of a self-supporting element consists of a deep-stretched synthetic film or made by injection molding. 18. The device according to 17, characterized in that the lower, respectively upper, part formed in the form of a non-self-supporting element consists of a flexible synthetic film. 19. The device according to claim 1, characterized in that the outlet openings and, if necessary, transport channels have a round or oval cross-section. 20. The device according to claim 1, characterized in that the transport channels and, if necessary, the distribution section is provided with a locking element. 21. The device according to claim 20, characterized in that the locking element has a plurality of locking zones with a correspondingly shaped channel cross-section for clamping the transport channels. 22. The device according to claim 1, characterized in that means are provided for adjusting the distance between the outlet openings of adjacent transport channels. 23. A device according to any one of claims 1 to 7, 11, 12, 14-16, 18-22, characterized in that the device for distributing adhesive is formed for use in a device for applying adhesive to a surface (12), in particular on stones for masonry walls, and the device for distributing adhesive with the possibility of extraction can be installed in the main part of the device for applying and includes an inlet connected to the reservoir tank. 24. The use of a device for distributing an adhesive according to any one of claims 1 to 23 for applying an adhesive to a base and then gluing an internal or external architectural element, in particular stone for laying walls, carpet, parquet, facade element or thermal insulation element. 25. The application according to paragraph 24, wherein the adhesive substance consists of applied in a liquid flowing state and then cured synthetic material, in particular an adhesive based on polyurethane.

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