EP1749586A1 - Device and procedure for controlling the width and/or the density of a fluid mass - Google Patents

Abstract

The device has a nozzle (1) which consists of a nozzle head (2) and two preferably three discharge openings provided in the nozzle head. These openings individually open to adjust the application width or density. Many cams are provided for closing many discharge openings (5). Independent claims are also included for the following: (A) Container for a flowing mass; and (B) System.

Description

The invention relates to devices and methods for adjusting the application width and / or the coating density of a flowable mass with a nozzle and a closure. The outflow is adjusted by opening prepared outlet openings.

Numerous devices and methods are known for applying flowable compositions to surfaces. The large-area application of low-viscosity liquids is usually carried out as a spray application with spray gun or spray cans. Also known is the order by means of brushes or rollers.
For full-surface gluing of parquet and laminate floors or baseboards, adhesive beads are applied from a cartridge via nozzles, nipples or grommets to the parts to be bonded. Usually, the nozzles are screwed to the cartridge or it forms a unit with the closure of the cartridge. Such nipples or nozzles usually have conically tapered tips, so that the width of the exiting bead is either specified by the manufacturer or can be determined by cutting.
This application method has the particular disadvantage that for applying caterpillar coulters or generally for large-scale application, the applied mass must be subsequently passed with a spatula, in particular a toothed spatula. This method is mainly used for viscous substances. This application requires several operations, especially when multiple caterpillars must be applied one behind the other, which prolongs the application and therefore particularly disadvantageous in fast curing or setting substances.

For larger area applications, a serpentine caterpillar can also be applied. This has the disadvantage that a uniform application of the adhesive bead is difficult to realize. It is particularly difficult to apply evenly and consistently to narrow, long surfaces such as baseboards. There is a risk of slipping off of the narrow surface, so that a uniform order strongly from the skill resp. depends on a calm hand of the person applying.

Conventional closures for containers of flowable materials such as adhesives are provided with a nipple to which no change nozzle can be mounted. In turn, other closures are threaded, so that the adhesive application can be applied only by attaching an additional nozzle. It is a disadvantage of the known cartridge closures with integrated nipple that it no change nozzles can be attached. Once the nipple is open, there is no way to influence the shape of the caterpillar.

Another known application method flowable masses is the use of flat or hole nozzles. With a flat nozzle, instead of a bead, a film of the substance to be applied is applied. With a hole nozzle several beads can be applied simultaneously in one go.

In utility model DE 8337643 U1 Such a hole nozzle is described. It allows the wide-area application of viscous liquids, in particular adhesives, which can be dispensed with the serpentine application. The nozzle widens starting from a mouthpiece, which can be screwed onto a cartridge, up to an output bar on which several holes are arranged in a row. Through the holes emerges the mass to be applied in caterpillars.

A disadvantage of such hole nozzles is that the number and the distance of the holes are fixed. The number of exiting beads can only be varied by using different hole nozzles with different number of holes or hole arrangement. In addition, the uniform guidance of the nozzle over a surface requires considerable skill, especially if the nozzle head is narrower than the workpiece to be machined.

It is an object of the invention to avoid the disadvantages of the known, in particular to provide apparatus and methods for adjusting the application width and / or application density of a flowable mass with a nozzle, which ensures the user flexibility in the number and arrangement of the holes. Job width is the distance between the two outermost caterpillars. The application density is determined by the amount of applied substance per surface unit.

This object is achieved with apparatuses for adjusting the application width and / or the application density and for closing a container according to the independent claims and the methods described below.

A device according to the invention for adjusting the application width and / or the application density preferably comprises a nozzle, on which at least two, preferably at least three, closed outlet openings are provided, which can be opened individually for setting the application width and / or application density.

In a particularly preferred embodiment, one or more outlet openings are closed with one or more cams, which can be separated to create outlet openings. Cams are only slightly above the outlet openings to understand outstanding closures, which are not comparable to the nipples on conventional tube closures. Substantially protruding cams would hinder the application of the mass, especially if the outlet openings are only selectively opened. Preferably, the cams for opening the outlet openings are separated flush with the nozzle surface, for example with a knife. It has been found that when the die is injection molded from plastic, the cam shape is particularly well suited: the cams are easily separated and the closed orifices remain reliably closed even with increased internal pressure in the die.

Another preferred form of the invention is that the outlet openings can be opened by separating, for example by tearing or pushing in, of cover elements. The separation takes place along one or more predetermined breaking points. In a preferred manner, the predetermined breaking points are already produced during the production of the nozzle head by injection molding. In another embodiment, the predetermined breaking points are punched in a second production step in the output bar. Another method of manufacturing the fractures are material removal processes, such as milling or etching.

A preferred nozzle form comprises a nozzle head, which expands against the exit region in a plane. As a result, larger job widths are possible.

Preferably, the openable outlet openings are arranged in a plane of the outlet area, in particular on an output bar of the nozzle. For flat surfaces, flat output bars prove to be advantageous. For the application to profiled surfaces, the plane of the outlet openings is formed in a preferred manner analogous to the surface profile. Preferably, the plane of the exit openings forms a right angle to the longitudinal axis of the storage container, such as e.g. a cartouche. As a result, when applied by hand, the composition can be applied particularly advantageously by resting an edge of the dispensing strip on a surface and angling the container over the surface, preferably at an angle of approximately 30 ° to 60 ° to the surface, so that the outlet openings do not lie directly on the surface and the mass can flow out freely or can be pushed out.

One or more openable outlet openings are preferably arranged on an output bar, which is fastened or attachable in the outlet area. It has been found that the production of injection molded plastic nozzles advantageously takes place in two parts by creating a slot die and an output strip. In a second step, the parts are permanently or only temporarily connected.

Preferably, the prepared exit openings are arranged so as to leave sufficient space therebetween to provide additional exit openings at optional locations adjacent the prepared exit openings, e.g. by drilling. A removable dispensing bar facilitates the attachment of additional openings in the nozzle head and / or the dispensing bar.

The distance between two adjacent outlet openings is preferably constant and is preferably in a range from about 1 to 100 mm. Particularly advantageous proves a distance of about 20 mm. Of course, other distances are conceivable and the invention is not limited to the dimensions mentioned. It is advisable not to choose the distance too large, since not all the outlet openings must be opened, which in turn results in a greater distance between the beads.

In a particularly advantageous embodiment, the nozzle head is provided in the outlet region with at least one protruding guide element. As a result, the nozzle head can be guided along an edge or corner, for example, so that a uniform application of the hand can be achieved.

The distance of a guide element to the nearest outlet opening is preferably half the distance between two adjacent outlet openings and is in particular in the range of 0.5 to 50 mm, preferably 10 mm. This ensures a uniform application of the mass to a surface.

The preforming of the exiting bead is determined only by the wall thickness of the exit area. In particular, no extensions are attached to the outlet openings, neither on the outside nor on the inside in the nozzle head. This is advantageous when applying highly viscous substances, because in this way the extrusion pressure does not have to be additionally increased due to increased wall friction at the outlet openings. At the same time the risk of clogging is reduced, because narrow channels are missing. In a preferred embodiment, the outlet openings are arranged in an approximately perpendicular to the flow direction of the exiting flowable mass extending wall of the outlet strip.

In a preferred embodiment, the nozzle is connected or connectable to a container, in particular a cartridge, a tube or a tubular bag. As a result, the flowable contents of the container can be applied.

The nozzle is preferably provided with a connecting means, in particular a thread. Particularly advantageous is an internal thread, which can be screwed onto conventional commercial threaded fasteners.

The inventive device for closing a container such as a cartridge, tube or tubular bag, comprises a lower shoulder part with an inlet opening which is connected to the container or connectable. The device also comprises a nipple, which is provided with an outlet opening or is providable. The inlet opening and the outlet opening are connected via at least one channel. Between the mouthpiece and nipple, a connection region is arranged, with which exchangeable applicator devices, in particular nozzles described above, can be fastened or fastened.

Particularly preferably, the connection region comprises a standardized external thread. This can be conventional tip or flat nozzles attach or a nozzle according to claim 1, provided that the nozzles have a corresponding thread.

A preferred embodiment is characterized in that the outlet opening with a closure piece, in particular a cap, is closed or closable.
With the closure piece of the container can be temporarily closed and drying of the contents is prevented. Conceivable is a closure piece, which is attached to the nipple, as well as longer Verschlusstücke be used, which are attached to the connection area between the shoulder part and nipple.

Another preferred embodiment comprises a container for a flowable mass, in particular a cartridge, tube or a tubular bag with a device for adjusting the application width and / or application density according to the above description.

The invention further comprises a system with a device for adjusting the application width and / or application density of a flowable mass with a nozzle and a device for closing a container as described above.

However, it is also conceivable to distribute the combination of a container such as a cartridge, tube or a tubular bag and an applicator for setting the application width and / or application density of a flowable mass as a kit.

Another embodiment comprises a system comprising a container for a flowable mass, a closure device as described above and an application device for adjusting the application width and / or application density of a flowable mass.

Preferably, the above systems comprise a plurality of nozzles for applying mass in different application width and / or application density. They differ primarily in the design of the output bar. Therefore, interchangeable dispensing bars in combination with one and the same nozzle head are particularly practical. This is advantageous, for example, different surfaces to edit with milled profiles or to vary the exit quantity.

Conceivable, however, are also different embodiments of the nozzle resp. the nozzle head itself, in particular different widths, and / or that the number and / or arrangement of the outlet openings differs.

The invention also includes a method for adjusting the application width and / or the application density of a flowable mass, in particular an adhesive, with a nozzle comprising a nozzle head. At the nozzle head at least two outlet openings for adjusting the application width and / or application density of the mass are opened. The selection of the openings is freely selectable under the prepared outlet openings.

Fig. 1:

Perspektivische schematische Ansicht einer Düse mit einem Führungselement, deren Austrittsöffnungen mit Nocken verschlossen sind,

Fig. 2:

Schematische Ansicht einer Düse nach der Ausführungsform gemäss Fig. 1,

Fig. 3:

Schematische Seitenansicht einer Düse nach der Ausführungsform gemäss Fig. 1

Fig. 4a:

Schematische Ansicht des Austrittsbereichs mit alternativer Ausführung eines Führungselements

Fig. 4b:

Schematische Ansicht des Austrittsbereichs mit einer weiteren Ausführung eines Führungselements

Fig. 5:

Schematischer Querschnitt durch eine Austrittsöffnung, verschlossen mit einem Nocken

Fig. 6:

Schematischer Querschnitt durch eine Austrittsöffnung, verschlossen mit einem Deckelelement

Fig. 7:

Perspektivische Ansicht einer Verschlussvorrichtung für einen Behälter

Fig. 8:

Schematischer Querschnitt durch einen Verschlussvorrichtung

Fig. 9:

Schematischer Querschnitt durch ein Werkstück mit aufgetragenen Raupen mit kleiner Auftragsbreite und grosser Auftragsdichte

Fig. 10:

Schematischer Querschnitt durch ein Werkstück mit aufgetragenen Raupen mit grosser Auftragsbreite und kleiner Auftragsdichte

Fig. 11:

Schematische Ansicht eines Behälters mit einer Düse

Fig. 12:

Schematische Ansicht eines Behälters, Verschlussvorrichtung und Düse

In the following, various embodiments will be explained with reference to the drawings. Show it:

Fig. 1:

Perspective schematic view of a nozzle with a guide element whose outlet openings are closed with cams,

Fig. 2:

Schematic view of a nozzle according to the embodiment of FIG. 1,

3:

Schematic side view of a nozzle according to the embodiment of FIG. 1

Fig. 4a:

Schematic view of the exit region with an alternative embodiment of a guide element

Fig. 4b:

Schematic view of the exit region with a further embodiment of a guide element

Fig. 5:

Schematic cross section through an outlet opening, closed with a cam

Fig. 6:

Schematic cross section through an outlet opening, closed with a cover element

Fig. 7:

Perspective view of a closure device for a container

Fig. 8:

Schematic cross section through a closure device

Fig. 9:

Schematic cross section through a workpiece with applied caterpillars with small application width and high application density

Fig. 10:

Schematic cross-section through a workpiece with applied caterpillars with large application width and small application density

Fig. 11:

Schematic view of a container with a nozzle

Fig. 12:

Schematic view of a container, closure device and nozzle

1 shows a nozzle 1 according to the invention with a nozzle head 2 and an outlet region 3. Four cams 5 are arranged above the outlet openings on the delivery bar 7. There are also more or less than four cams 5 conceivable. The nozzle head 2 expands against the outlet region 3 in a plane and at the narrower end of the nozzle head connecting means 9 are mounted, which allow to connect the nozzle with a container. A lateral guide element 8 protrudes beyond the plane of the outlet openings and forms a right angle with this.

A same nozzle as in Fig. 1 is shown in Fig. 2 in a view. The cams 5 on the discharge bar 7 projecting beyond the plane of the outlet openings 4, which are closed by the cams. The distance between the lateral guide element 8 is half the distance between two adjacent outlet openings 4. Shown dashed is the inner nozzle area where the mass can flow.

3 shows a schematic view of the narrow side of a nozzle 1. The nozzle 1 comprises connecting means 9 from where the walls of the nozzle head 2 taper conically toward one another and in the fan-shaped region the nozzle head walls extend parallel to one another. As an internal thread connecting means is shown, so that the nozzle 1 on a cartridge (not shown) can be screwed. The guide element 8 protrudes beyond the plane with the outlet openings 4.

FIG. 4 a shows another embodiment of the guide element 8 in a view of the narrow side of the nozzle head 2. The element is perpendicular to the broad plane of the nozzle head 2 and does not protrude beyond the plane of the outlet openings 4. In a further embodiment according to FIG. 4b, an annular disk-shaped guide element 8 is realized, which is mounted perpendicular to the widening plane and protrudes both over the plane with the outlet openings 4 and on both sides over the widening plane of the nozzle head 2.

5 shows a cross section of an outlet opening 4 in an output bar 7, which is closed by a cam 5. With a tangential to the plane of the outlet openings 4 section, the cam 5 can be removed.

6 shows a cross section through another embodiment of an outlet opening 4 prepared for opening: the cover element 6 is connected to the output bar 7 via predetermined breaking points 20.

7 shows a perspective view of a closure device 25 for a container 24, in particular for low-viscosity substances. The shoulder part 10 is initially cylindrical and has threads on the inside for connection to a container 24 and tapers conically towards the connection region 15. which is provided here with an external thread 17. At this external thread 17 can now any nozzles, especially those as shown in Fig. 1 or commercially available pointed nozzles, are attached. This is followed by a nipple 12, which is shown cylindrically, through which then the adhesive can flow through the channel 14 from the outlet opening 13.
On the shoulder part 10, a closure piece 16 is attached via a flexible band, with which the nipple 12 can be temporarily closed. It is also possible to choose a larger closure piece 16 which can be screwed to the connection area 15, in which case the closure piece 16 must be separated from the flexible band.

8 shows a cross section through such a closure device 25. The shoulder part 10 comprises an internal thread 18 and, moreover, it tapers to the connection region 15 with the external thread 17 followed by the nipple 12 with an outlet opening 13. In this illustration, the nipple 12 is connected to the Closure piece 16 closed.

FIG. 9 shows a schematic cross section through a workpiece 22 with beads 23. Three beads 23 are shown, ie three of the seven total outlet openings 4 on the nozzle head 2 have been opened. In FIG. 10, four out of seven outlet openings 4 are open, so that four caterpillars 23 are created, which are distributed over a larger area of the workpiece 22.

The application density becomes smaller, but the application width is wider than in FIG. 9.

Fig. 11 illustrates a container 24 and a nozzle 1 for adjusting the application width and / or the coating density. In the present case, the nozzle 1 was screwed directly onto the container 24.

Fig. 12 shows in a view a container 24, a closure device 25 and a nozzle 1 for adjusting the application width and / or the order density. In this illustration, the three parts are shown screwed together.

Claims (23)

Device for setting the application width and / or the coating density of a flowable mass, in particular an adhesive, with a nozzle (1), comprising a nozzle head (2), characterized in that at least two, preferably at least three, closed outlet openings (12) on the nozzle head (2). 4) are provided, which can be opened individually for setting the application width and / or application density. Apparatus according to claim 1, characterized in that one, in particular a plurality of outlet openings (4) with one, in particular a plurality of cams (5) are closed, which for the creation of outlet openings (4) are separable. Apparatus according to claim 1, characterized in that at least one, in particular a plurality of outlet openings (4) by separating, in particular by tearing or pushing, of at least one, in particular a plurality of cover elements (6) along one, in particular a plurality of predetermined breaking points (20) can be opened in particular one or more predetermined breaking points (20) are pre-punched, cast, milled or etched. Apparatus according to claim 1, characterized in that the nozzle head (2) expands against the outlet region (3) in a plane. Apparatus according to claim 1, characterized in that the opening of several outlet openings (4) allows is, which in a plane in the outlet region (3) of the nozzle (1), in particular on an output bar (7), are arranged. Apparatus according to claim 1, characterized in that one, in particular a plurality of openable outlet openings (4) on an output bar (7) are arranged, which in the outlet region (3) is fastened or fastened. Apparatus according to claim 1, characterized in that in addition to the outlet openings (4) intermediate spaces for attaching additional outlet openings (4) are provided. Device according to one of claims 1 to 7, characterized in that the distance between two adjacent outlet openings (4) is constant, in particular the distance is about 1 to 100 mm, preferably 20 mm. Apparatus according to claim 1, characterized in that the nozzle head (2) in the outlet region (3) has at least one projecting guide element (8). Apparatus according to claim 9, characterized in that the distance of a guide element (8) to the nearest outlet opening (4) is half the distance between two adjacent outlet openings (4), in particular the distance about 0.5 to 50 mm, preferably 10 mm. Apparatus according to claim 1, characterized in that the outlet openings (4) as holes in an approximately perpendicular to the flow direction of the exiting flowable mass extending wall of the outlet strip (7) are. Apparatus according to claim 1, characterized in that the nozzle (1) with a container (24), in particular a cartridge, a tube or a tubular bag, connected or connectable. Apparatus according to claim 1, characterized in that the nozzle (1) is provided with a connecting means (9), in particular a thread. Device for closing a container (24), in particular a cartridge, tube or tubular bag, with a lower shoulder part (10) which is connected or connectable to the container and which has an inlet opening (11) and with a nipple (12 ), which is provided with an outlet opening (13) or is providable, wherein inlet opening (11) and outlet opening (13) via at least one channel (14) are connected, characterized in that between the shoulder part (10) and nipple (12) Connection region (15) is arranged, with which interchangeable application devices, in particular according to claim 1, are fixed or attachable. Apparatus according to claim 14, characterized in that the connecting region (15) comprises an external thread (17). Apparatus according to claim 14, characterized in that the outlet opening (13) with a closure piece (16), in particular a cap, is closed or closable. Container (24) for a flowable mass, in particular a cartridge, tube or tubular bag, with an application device according to one of claims 1 to 13. System comprising a device for adjusting the application width and / or application density of a flowable mass, in particular according to one of claims 1 to 13, and a device for closing a container (24), in particular according to one of claims 14 to 16. System comprising a container (24) for a flowable mass, in particular a cartridge, a tube or a tubular bag, and an applicator device according to one of claims 1 to 13. A system comprising a container (24) for a flowable mass, an applicator device according to any one of claims 1 to 13 and a closure device (25) according to any one of claims 14 to 16. System according to one of claims 18 to 20 comprising at least two nozzles (1) for applying mass in different application width and / or application density, in particular with different output bar. System according to claim 21, characterized in that the nozzles (1) have different widths and / or different numbers and / or arrangements of outlet openings. Method for adjusting the application width and / or the application density of a flowable mass, in particular of an adhesive, with a nozzle (1) comprising a nozzle head (2), characterized in that at the nozzle head (2) at least two outlet openings (4) for adjusting the application width and / or application density of the mass are opened.

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