EP2569131B1 - Device and method for combining veneer strips, said device having an expansion chamber - Google Patents

Description

The present invention relates to an apparatus and method for assembling veneer strips with an expansion space in an adhesive activation zone, in particular for avoiding contact between activated adhesive on the veneer strips and components of the device.

Devices for assembling veneer strips are known from the prior art in different embodiments. Basically, devices must be distinguished in which a gluing station is preformed, which glues the edges of the veneer strips and then immediately after the assembly takes place. Alternatively, the edges of veneers may be pre-wetted with an adhesive, in particular polyvinyl acetate (PVAc) dispersion adhesive, and intermediately stored. This storage over several months or even years is possible. For the assembly then the veneers in the device is fed and the adhesive dried at the edges must be activated. This can be done for example by means of hot air. After activation, the veneer strips can then be joined together. Since it is no longer possible to adjust the amounts of adhesive applied to the edges in the second machine variant, but has already been carried out separately of time, it is often the case, for example, that too much adhesive was applied to the edges. This then results in activating the adhesive and then assembling the veneer strip the problem that the excess adhesive is pressed out during the joining process of the veneer strip between the edges and can lead to poor jointing and contamination of machine parts. This results in higher rejects and additional cleaning breaks for the machine, so that the production of a veneer carpet often has to be interrupted. Furthermore, from the DE 33 04 315 A1 a device according to the preamble of claim 1 and a method according to the preamble of claim 12 known.

It is therefore an object of the present invention to provide a device and a method for assembling veneer strip, which allows a simple construction and simple, inexpensive to manufacture a high quality, butt veneer veneer joint with less polluting machine. This is achieved by a device having the features of claim 1 and a method having the features of claim 12. The dependent claims show preferred developments of the invention.

The inventive device for assembling veneer strip with the features of claim 1 has the advantage over that pollution of the device can be avoided by adhesive residues. As a result, a cost-effective and continuous composition of veneer strips with high-quality adhesive joint can be performed. This is inventively achieved in that the device has an adhesive activation station, which has at least one hot air source and a hot air path emanating from the hot air source with an outlet element. The outlet element comprises an outlet opening and an expansion space. Thus, the outlet opening and additionally the expansion space are provided in the outlet element. Hot air flows out of the outlet opening and flows past the edges of the veneer strip passing over the outlet opening in order to move the

Activate adhesive on the edges. The outlet opening and the expansion space are arranged below and / or above a Veneierzufuhrebene so that the hot air is fed from below and / or above to the veneer edges. The expansion space can also serve as a drainage device for excess adhesive. Thus, according to the invention, if at the veneer edges in a previous step e.g. Too much adhesive was applied, the activated adhesive undergo an expansion under heat, without touching surrounding workpiece edges and adhere to this. As a result, in particular a withdrawal of adhesive from the adhesive joint is avoided by adhesion of adhesive to machine parts and also prevents contamination of the device. The invention is particularly suitable for the use of a dispersion adhesive (especially mixed white glue) on the veneer edges, which has the great advantage that it is free of formaldehyde and is very easy to handle. Furthermore, a dispersion adhesive is also very inexpensive compared to other adhesives.

Preferably, the expansion space and the outlet opening are fluidically connected with each other, wherein preferably the outlet opening opens into the expansion space. This ensures that the expansion space is provided directly at the outlet of the hot air and thus immediately after heating the adhesive located at the edges no possibility of contact of the adhesive with other components of the machine is present, and may absorb excess adhesive if necessary. By the fluidic connection between the expansion space and the outlet opening is further achieved that the hot air can flow into the expansion space and along the expansion space, a directed flow takes place, whereby the hot air is led past the edges of the veneer strips longer.

More preferably, the expansion space as an expansion channel, in particular as a rectilinear, extending in a conveying direction of the veneer strip expansion channel is formed. By this measure, the expansion channel is parallel to the joint of the veneer strip, so that during the incipient joining process, in which the veneer strips are continuously moved in the conveying direction over the entire distance from the hot air outlet to the joining zone, if necessary, the adhesive expands in the expansion channel, without doing to come in contact with machine parts. In this way, a contact is made before the joining zone even with expansions of the adhesive between adhesive and machine avoided, so that excellent adhesive joints are obtained in the subsequent joining step. Optionally, in a further subsequent step, excess adhesive joint residues may be ground off the produced veneer carpet. Furthermore, the hot air can be excellently guided along the expansion channel.

More preferably, the device comprises an air flow deflection device, which is arranged above the outlet opening. The air flow deflection device serves for channeling the hot air in order to activate the adhesive at the veneer edges in the entire surrounding area of the outlet opening of the hot air and before the composition zone, whereby more uniform heating of the adhesive and better utilization of the thermal energy is achieved in these areas. As a result, a higher ambient temperature is achieved in the entire surrounding area of the outlet opening. The exiting through the outlet hot air is thus passed through the gap between the two veneer strips to be joined and meets the air flow deflection device. As a result, the hot air is deflected, in particular in the conveying direction of the veneer strip and, in addition, the air flow deflection device itself also heats up. In this way, a faster activation of the adhesive can be achieved.

The air flow deflection device is preferably made of a material with good thermal conductivity. As a result, a very good heat distribution at the air flow deflection device is achieved, so that an activation region for the adhesive is not only present directly at the outlet opening for the hot air, but the activation takes place due to the high temperatures in preceding or subsequent sections. Preferably, the air flow diverter is made of copper sheet.

More preferably, a distance between a surface of the outlet element and the air flow deflection device is slightly larger than a thickness of the veneer strips. In this way, a targeted flow of the hot air can be provided first through the gap between the veneer strips to be joined and then along the air flow deflection device.

Particularly preferably, the air flow deflection device has a surface such that a coefficient of friction between the surface and the veneer strip is as small as possible. Particularly preferably, the surface of the air flow deflection device has a Teflon coating or the like.

More preferably, the air flow deflection device has at least one air passage opening. This makes it possible that supplied hot air can escape from the air passage opening on the veneer strip. This prevents in particular unwanted noise by vibrating veneer strips. The air passage opening may, for example, be in the form of a slot or row of holes, e.g. cylindrical holes or slots are provided. More preferably, the air passage opening on a side facing the expansion space on a recessed recess. The air passage opening is preferably provided such that it is arranged completely or partially above the expansion space and in particular above the outlet opening of the hot air.

According to a further preferred embodiment of the invention, the device comprises a pressure roller for exerting a vertical pressure on the veneer strip, wherein the expansion space in the outlet element extends into the region of the pressure roller and particularly preferably up to a region of a vertical projection of a rotation axis of the pressure roller. In other words, the expansion space preferably extends below the axis of rotation of the pressure roller, since here the pressure roller is in contact with the veneer strip and, if appropriate, excess adhesive can still escape from the joining area between the two veneer strips.

More preferably, the hot air path opens at the outlet element perpendicular to the surface of the outlet element. Alternatively, the hot air path at the outlet element also emerge at an angle. Preferably, the angle is between 30 ° and 60 °, preferably 45 °, wherein the outlet direction of the hot air is directed in Veneierförderrichtung.

The inventive method according to claim 12 allows a very high quality, blunt composite veneer joint between two veneer strips Prevent contamination of a veneer splicer. For this purpose, according to the inventive method, first a pair of veneer strips in a feed region of the machine are fed in one plane, then a dispersion adhesive applied to the edges of the veneer strips is activated by means of hot air exiting an exit element and subsequently the veneer strips are applied to the adhesive-activated veneer edges blunted. After activation, the veneer strips are guided past an expansion space of the exit element in order to avoid contact of the activated dispersion adhesive with machine parts. The expansion space extends into a transition region between an activation region in which the dispersion adhesive is activated and a joining region in which the veneer strips are joined. By providing the expansion space and passing the adhesive-activated veneer edges to this expansion space, soiling of the machine can be avoided. The expansion space makes it possible that the activated veneer edges no longer come into direct contact with machine parts of the machine until the beginning of joining, where they cause soiling. Thus, an immediate adhesion of the adhesive to subsequent machine parts can be avoided. However, the quality of joining is not impaired by this, since if necessary, excess adhesive is pushed out by the compression of the veneer strips on the veneer edges and can then be simply cured and subsequently abraded.

The method is particularly effective when the expansion space is preferably provided as an expansion channel and an outlet opening opens into the expansion channel, so that the exiting the outlet opening hot air also flows into the expansion channel. In this way, in particular, an improved activation of the dispersion adhesive and higher temperatures in the activation region of the machine can be achieved.

Fig. 1

eine schematische Schnittansicht einer Vorrichtung zum Zusammensetzen von Furnierstreifen gemäß einem ersten Ausführungsbeispiel der Erfindung,

Fig. 2

eine schematische Draufsicht auf die Vorrichtung von Fig. 1,

Fig. 3

eine perspektivische Ansicht eines in der Vorrichtung verwendeten Austrittselements,

Fig. 4

eine schematische Schnittansicht einer Vorrichtung zum Zusammensetzen von Furnierstreifen gemäß einem zweiten Ausführungsbeispiel der Erfindung,

Fig. 5

eine schematische Schnittansicht einer Vorrichtung zum Zusammensetzen von Furnierstreifen gemäß einem dritten Ausführungsbeispiel der Erfindung,

Fig. 6

eine vergrößerte, perspektivische Darstellung eines Bauteils zur Zuführung von Heißluft gemäß dem dritten Ausführungsbeispiel,

Fig. 7

eine schematische Schnittansicht einer Vorrichtung zum Zusammensetzen von Furnierstreifen gemäß einem vierten Ausführungsbeispiel,

Fig. 8

eine schematische Draufsicht der Vorrichtung von Fig. 7, und

Fig. 9 bis 11

alternative Ausgestaltungen einer erfindungsgemäßen Luftstrom-Umlenkeinrichtung.

Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing is:

Fig. 1

a schematic sectional view of an apparatus for assembling veneer strip according to a first embodiment of the invention,

Fig. 2

a schematic plan view of the device of Fig. 1 .

Fig. 3

a perspective view of an outlet element used in the device,

Fig. 4

a schematic sectional view of an apparatus for assembling veneer strip according to a second embodiment of the invention,

Fig. 5

a schematic sectional view of an apparatus for assembling veneer strip according to a third embodiment of the invention,

Fig. 6

an enlarged perspective view of a component for supplying hot air according to the third embodiment,

Fig. 7

a schematic sectional view of an apparatus for assembling veneer strip according to a fourth embodiment,

Fig. 8

a schematic plan view of the device of Fig. 7 , and

Fig. 9 to 11

alternative embodiments of an inventive air flow deflection device.

The following is with reference to the FIGS. 1 to 3 a method and an apparatus 1 for assembling veneer strips according to a first embodiment of the invention described in detail.

How out Fig. 1 it can be seen, the device 1 comprises a Veneierzufuhrebene E, in which veneer strips 2 are supplied. The feeding of the veneer strips can be done manually or automatically. As in particular from Fig. 2 it can be seen, two veneer strips 2 are always fed in parallel, wherein at the facing edges 2a of the veneer strip already an adhesive is applied, which must be activated in a subsequent step. For this purpose, the device 1 comprises an adhesive activation station 3, which is then followed by a veneer filling station 4. In the adhesive activation station 3, the adhesive present at the edges 2 a is activated, so that joining of the veneer strips is then possible in the subsequent step. The adhesive may preferably be a formaldehyde-free dispersion adhesive applied to the edges 2a, wherein the applied adhesive, may have been applied several months earlier at the veneer edges. The adhesive activation station 3 comprises a stationary hot air source 5 and a hot air path 6 emanating from the hot air source 5 with an outlet element 7. The outlet element 7 comprises an outlet opening 8 and, as an expansion space, a rectilinear groove 9 with a preferably rectangular or U-shaped cross section. The groove 9 opens, as seen from Fig. 1 and 3 can be seen, in the outlet opening 8 and starts from this. How out Fig. 1 it can be seen, the groove 9 and the outlet opening 8 is arranged below the veneer feed plane E. Thus, the hot air flows from below through the exit element 7 in the gap 10 between the two veneer strips 2 to be joined (see Fig. 2 ), wherein the groove 9 has a width which is greater than the gap 10. The outlet opening 8 has a larger diameter than the hot air path 6.

For easy attachment of the exit element 7 to a component 18, e.g. in a frame, for example, a screw-threaded, cylindrical hollow pin 17 may be provided, which has a central passage opening 17a, through which the hot air path 6 is passed. Thus, the hot air can then be guided through the hollow bolt 17 to the outlet opening 8 and the outlet member 7 are fastened in a simple manner to another component 18.

The device 1 further comprises an air flow deflection device 11 and a separating web 12. The air flow deflection device 11 is, as seen from Fig. 1 can be seen attached to the divider and formed as a copper sheet and is above the outlet opening. 8 and partially disposed over the groove 9. The air flow deflection device 11 has the task of redirecting the emerging from the outlet opening 8 hot air, which flows through the gap 10 between the two veneer strips 2, to redirect. This is in Fig. 1 indicated by the arrow B, wherein the arrow A indicates the hot air flowing from the hot air source 5 through the hot air path 6 hot air. In Fig. 1 Furthermore, a conveying direction of the veneer strips 2 is marked with the arrow C.

The device 1 further comprises in a known manner two Diskusscheiben 13, 14 and a pressure roller 15, which rotates about a center 16. How out Fig. 1 it can be seen, the groove 9 is arranged in the conveying direction C of the veneer strip so that it extends to a vertical projection of the rotation point 16 of the pressure roller 15.

The function of the device 1 according to the invention is as follows. The veneer strips already have adhesive at their edges 2a, which was applied there in a preceding step, whereby the adhesive may be dried or at least dried. This may have happened some time before. The veneer strips are then fed into the veneer feed plane E, whereby the veneer strips can be applied to the separating web 12 for a simple alignment. The veneer strips 2 are then moved manually or by a chain drive in the direction of the conveying direction C of the veneer strips and guided over the outlet element 7. The alignment of the veneer strips 2 is such that the gap 10 between the two veneer strips is above the outlet opening 8 in the outlet element 7. Hot air, which is supplied through the hot air path 6 to the outlet opening 8, then exits between the two veneers 2 at the edges 2a provided with adhesive and activates the adhesive present there. The activated adhesive can experience a reduction in viscosity. This increases the risk of adhesion and partial stripping on surrounding components, which can come into direct contact with the adhesive-wetted veneer edges 2a. The groove 9 thus provides an expansion space available, so that sticking and stripping is omitted. Optionally, excess adhesive can also be collected in the groove 9. The veneer strips 2 are continuously passed further past the adhesive activation station 3.

In the area of Diskusscheiben 13 and the pressure roller 15 then begins the joining process. Here, the veneer strips are conveyed through the two Diskusscheiben 13, 14 and the pressure roller 15. During the movement of the veneer strips 2, the entire edge length of the veneer strips is thus guided past the outlet opening 8 and the adhesive is activated for the joining process. The air flow deflection device 11 arranged above the outlet opening 8 and a partial region of the outlet element 7 additionally supports the activation process, since the hot air is diverted at the air flow deflection device 11. In this exemplary embodiment, in which the hot air path 6 opens perpendicular to a surface 7a of the outlet element 7, the hot air is diverted both in the conveying direction C of the veneer strips and counter to the conveying direction of the veneer strips. This has the advantage that the entire closer environment from the outlet opening 8 and in particular the outlet element 7, which is preferably made of a metallic material, and the air flow deflection device 11 are heated so that a total temperature in the area of the adhesive activation station 3 higher as in the prior art. As a result, a faster activation of the adhesive is possible, so that the passage speed for the veneer strips can be increased.

Thus, by providing the groove 9 can be prevented that excess adhesive is further transported through the device 1 and then dirty other components of the device or adhesive by contact of the activated adhesive with machine parts glue to the machine parts, which then in the subsequent joining step for the production Instead, the excess adhesive may optionally be collected in the groove 9 and the groove 9 may then be easily cleaned after joining a certain number of veneer strips 2.

The following is with reference to Fig. 4 a device for assembling veneer strip according to a second embodiment of the invention described, wherein the same or functionally identical parts are denoted by the same reference numerals as in the first embodiment.

How out Fig. 4 it can be seen, the device 1 of the second embodiment additionally comprises a second stationary hot air source 25 with a second hot air path 26. The second hot air source 25 and the second hot air path 26 are arranged above the Veneierzufuhrebene E, so that hot air additionally from the top of the edges the veneer strip 2 can be supplied (arrow R). A second outlet opening 28 of the second hot air path 26 is in the conveying direction C of the veneer strips at the same height as the outlet opening 8 of the first hot air path 6. In this case, the second hot air path 26 is passed through the air flow deflection device 11. Further, in the air flow deflection device 11, a second expansion space in the form of a second, in the conveying direction C of the veneer strip 2 extending second groove 29 is formed. Hot air then flows out of the second outlet opening 28 into the second groove 29, wherein the two hot air streams flow against each other and partially flow against the veneer surfaces and are thereby deflected. Thus, the first groove 9 and the second groove 29 lie one above the other, wherein the mutually facing edges of the two veneer strips to be joined are passed exactly between the two grooves 9, 29. Thus, a hot air flow can be added both from below and from above to the gap 10 between the two veneer strips 2, so that an optimum heating of the applied adhesive at the edges of the veneer strips 2 is obtained. Since the adhesive located on the edges can expand in all directions when heated, in the second exemplary embodiment, in particular, adhesive is prevented from coming into contact with the airflow deflection device 11 and so that contamination or buildup can be avoided there. How out Fig. 4 it can be seen, the second groove 29 is formed over the, starting from the second outlet opening 28 in the conveying direction C, lying, full length of the air flow deflection device 11.

Preferably, a width and / or a depth of the first groove 9 and the second groove 29 is equal. It should also be noted that, instead of a second hot air source 25, a common hot air source may alternatively be provided for the first and second hot air paths. As a result, costs and space can be saved.

With reference to the FIGS. 5 and 6 Hereinafter, a device for assembling veneer strip according to a third embodiment of the invention will be described in detail, wherein the same or functionally identical parts with the the same reference numerals as in the preceding embodiments are designated.

As in particular from Fig. 5 it can be seen, in the third embodiment, in particular, a mouth of the hot air is formed on the outlet element 7 different from the mouths of the preceding embodiments. In the third embodiment, a nozzle 37 is fixed in the outlet element 7, which has a channel-like mouth section 38. The mouth cross section 38 opens into an elongated groove 9 and preferably has a same width as the groove 9. How out Fig. 5 It is to be noted, however, that the length of the channel-like orifice cross-section 38 can also be provided such that its length corresponds to that of the groove 9. This design of the elongated, channel-like orifice cross-section 38, which opens directly into the groove 9, an improved outflow of the hot air, as in the FIGS. 5 and 6 indicated by the arrows B1 and B2, can be achieved because the hot air can flow over a longer in the direction of movement of the veneers 2 area between the veneers. Furthermore, a fluidically better connection of the groove 9 to the outlet opening 38 is achieved. In this way, in particular, a longer activation zone in the machine lying somewhat in the conveying direction of the veneer strips can be achieved, so that the temperature of the hot air can be reduced. Otherwise, this embodiment corresponds to the previous embodiments, so that reference can be made to the description given there.

In the FIGS. 7 and 8 a device according to a fourth embodiment of the invention is shown, wherein the same or functionally identical are denoted by the same reference numerals as in the preceding embodiments.

The fourth embodiment substantially corresponds to the first embodiment, wherein additionally in the fourth embodiment, a slot 40 is provided in the air flow deflection device 11. The slot 40 is provided centrally in the air flow diverter 11 and extends as shown Fig. 7 it can be seen, above the expansion space designed as a groove 9. By providing the additional slot 40 in the air flow deflection device 11 can thus Hot air, which emerges from the hot air path at the outlet opening 8 and flows past the edges 2a of the veneer strip, in part also emerge from the slot 40. This is in Fig. 7 indicated by the arrow D. This prevents in particular that the veneer strips begin to oscillate in the area of the air flow deflection device 11 and produce unwanted noise. How out Fig. 8 it can be seen, the slot 40 is provided such that, starting from a free end of the air flow deflection device 11 in the direction of the separating web 12, it runs in a line with the separating web 12. The width of the slot 40 is constant. Thus, the air flow deflecting device 11 thus modified counteracts no or only a small flow resistance of the hot air flowing from below, so that, in particular, a lateral discharge of the inflowing air over the veneer strip is avoided.

In the Fig. 9 to 11 Alternative embodiments of the air flow deflection 11 are shown. Fig. 9 shows an embodiment in which an air passage opening in the air flow deflection device 11 is formed by a plurality of cylindrical holes 4 'arranged in series. Fig. 10 shows an alternative embodiment, in which the air passage opening is provided in the air flow deflection device 11 arranged in series slots 42. Fig. 11 shows a further alternative embodiment, in which at the air passage opening, which in turn is formed as a slot 40, on the side facing the groove 9, a recessed recess is provided. This can be avoided in particular that adhesive, in particular glue, adheres to the underside of the air flow deflection device 11. Therefore, the recess 43 is also provided slightly wider than the air passage opening.

Thus, as set forth in the embodiments, according to the present invention, by providing an expansion space in the adhesive activation zone, contact of the activated adhesive with components of the veneer strip assembling apparatus 1 can be prevented. As a result, downtime of the device due to cleaning work can be minimized. The expansion space is particularly preferably provided until the beginning of the joining zone in a channel-like form. Furthermore, an improved heating of the adhesive and thus an improved utilization of the heat energy can be achieved.

LIST OF REFERENCE NUMBERS

1

Veneer strip-synthesizer

2

veneer strips

2a

edge

3

Adhesive activation station

4

Veneer joining station

5

stationary hot air source

6

Hot air path

7

exit element

7a

surface

8th

outlet opening

9

Groove / expansion room

10

gap

11

Air flow deflector

12

divider

13, 14

discus

15

pressure roller

16

axis of rotation

17

hollow pin

17a

Through opening

18

component

25

second stationary hot air source

26

second hot air path

28

outlet opening

29

second groove

37

jet

38

Opening cross-section

40

slot

41

cylinder openings

42

Long hole

43

recess

A, B, D, R, S

Flow of hot air

C

conveying direction

e

Veneer feeding plane

F

print

Claims (15)

1. Device (1) for combining veneer strips (2), comprising:

   - a veneer supply plane (E) in which the veneer strips (2) are supplied,

   - a veneer joining station (4) in which the veneer strips (2) are joined along the edges (2a), and

   - an adhesive activation station (3) which activates an adhesive applied to one edge (2a) of the veneer strips (2)

   - wherein the adhesive activation station (3) has a hot air source (5) and a hot air path (6) emanating from the hot air source (5) and having an outlet element (7), characterised in that the outlet element (7) has an outlet aperture (8) and an expansion chamber (9) wherein hot air flows out from the outlet aperture (8) and flows past the edges (2a) of the veneer strip (2) in order to activate the adhesive along the edges (2a), and
   wherein the outlet element (7) is arranged under and/or above the veneer supply plane (E).
2. Device according to claim 1 characterised in that the outlet aperture (8) of the outlet element (7) opens into the expansion chamber (9).
3. Device according to one of the preceding claims characterised in that the expansion chamber is an expansion channel, more particularly a rectilinear expansion channel running in a conveying direction (C) of the veneer strips.
4. Device according to one of the preceding claims, further comprising an air flow deflection device (11) which is arranged opposite the outlet aperture (8)

   - wherein more particularly the air flow deflection device (11) is made from a material having good heat conduction, more particularly a metal-containing material.
5. Device according to claim 4 characterised in that a distance between a surface (7a) of the outlet element and the air flow deflection device (11) is somewhat greater than a thickness of the veneer strip (2), and/or that the air flow deflection device (11) has a surface such that a small friction value is produced between the surface of the air flow deflection device (11) and the veneer strip (2).
6. Device according to one of claims 4 or 5 characterised in that the air flow deflection device (11) has at least one air vent opening (40; 41; 42).
7. Device according to claim 6 characterised in that the air vent opening (40; 41; 42) comprises a slit or perforation row, more particularly a perforation row comprising a number of cylindrical holes and/or a number of oblong holes, or that the air vent opening (40; 41; 42) has a deepening recess (43) on a side directed towards the expansion chamber (9).
8. Device according to one of claims 6 or 7 characterised in that at least one partial region of the air vent opening (40; 41; 42) is arranged above the expansion chamber more particularly above the outlet aperture (8).
9. Device according to one of the preceding claims

   - further comprising a pressure roller (15) for exerting a pressure (F) on the veneer strips (2) wherein the expansion chamber (9) runs in the outlet element (7) up into the region of the pressure roller (15), preferably into a region of a perpendicular projection of a rotational axis (16) of the pressure roller (15), and/or

   - further comprising a hollow bolt (17) through which the hot air path (6) runs, wherein the outlet element (7) is fixed on a component part (18) by means of the hollow bolt (17).
10. Device according to one of the preceding claims characterised in that the hot air path (6) at the outlet element (7) opens perpendicular to the surface (7a) of the outlet element, or that the hot air path (6) at the outlet opening (7) opens at an angle to the surface of the outlet element, preferably at an angle between 30° and 60°, more particularly 45°.
11. Device according to one of claims 2 to 10 characterised in that the outlet opening (8) has a channel-like mouth cross-section (38) or an oval mouth cross-section.
12. Method for combining veneer strips (2) comprising the steps

    - supplying a pair of veneer strips (2) in a veneer supply plane (E)

    - activating a dispersion adhesive applied to one edge (2a) of the veneer strips (2) by means of hot air which exits from an outlet element (7), and

    - joining the veneer strips (2) at the adhesive-activated veneer edges (2a) characterised in that the veneer strips (2) at the outlet element (7) are guided past an expansion chamber (9) formed in the outlet element (7) in order to avoid contact between the activated dispersion adhesive with the machine parts.
13. Method according to claim 12 characterised in that the expansion chamber (9) is an expansion channel and an outlet opening (8) opens into the expansion channel so that hot air also flows into the expansion channel.
14. Method according to one of claims 12 or 13 characterised in that the hot air is supplied from above and/or from below to the veneer edges.
15. Method according to one of claims 12 to 14 characterised in that the hot air is diverted by means of an air flow deflection device (11) wherein the air flow deflection device (11) has in particular an air vent opening (40; 41; 42)

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