AT517183B1 - Umleimapparat - Google Patents

Abstract

A rewinder for attaching a cover tape to the edge (200a) of a plate (200), the tape having a thermally activatable side (100a). The banding apparatus comprises a holding device adapted to hold a plate (200) and a pressing device (11) adapted to press the band against an edge (200a) of the plate (200) to connect them. The rewinder includes a plurality of emitters (12) configured to emit laser beams aligned to a plurality of zones (A) of the thermoactivatable side (100a) of the belt (100) during operation ) to meet. The emitters (12) are arranged with respect to the pressing device (11) so that the zones (A) during operation along the feed direction (C) are aligned.

Description

Description: The present invention relates to a banding apparatus.

In particular, the present invention relates to an apparatus and a method for stranding in particular a wood panel with a veneer strip.

In particular, the present invention includes the attachment of such a band by means of thermal activation by a laser beam.

The present invention allows efficient control of the amount and uniformity of the heat delivered to the joint.

Compared to Umleimapparaten with laser activation, it also allows the reduction of the strength of the band to be joined, in particular its thermally activated layer, and thus allows the receipt of a higher quality processing of the size-coated products.

The present invention is thus to be classified in the field of gluing of plates.

Nowadays, a conventional Umleimapparat provides for the formation of an edge, which consists of a cover layer and an adhesive layer.

The adhesive layer is thermally activated to adhere to the edge to be coated.

The thermal activation of the adhesive layer is carried out by this conventional method by a laser beam.

An emitting device generates a laser beam which strikes the side of the belt provided with the adhesive layer.

The image of the beam on the belt, that is, the region of the latter hit by the beam, is moved over the entire height of the belt to activate the adhesive layer.

A variant known today provides an adjustable optical zoom, with which the amplitude of the laser beam image can be adjusted on the edge to adapt the latter to the height of the edge itself.

A disadvantage of these conventional methods is the use of a high power laser which requires efficient cooling.

Another disadvantage is that these methods provide the edge with a high power density, which is difficult to control and involves the risk of damaging the edge to be sanded.

In addition, the application of this conventional method is limited and not easily adaptable when changing the color of the edge to be glued and thus the associated with this radiation absorption.

From US 6451152 B1 an apparatus for producing a composite material is known, which activates the thermoaktivierbare side of the shroud by means of laser light.

The document EP 1334819 A1 discloses a device for producing a composite material which has a laser diode arrangement for heating a sliver.

The document EP 2345518 A1 discloses a device for coating workpieces, in which two power generation sections are provided, which are designed as two mutually different devices.

From WO 2010149376 A1 a device for attaching edge bands to the edge of a workpiece is known.

The problem underlying the present invention is to achieve greater flexibility when gluing.

The main object of the present invention is the realization of a banding apparatus which solves the above-mentioned problem and eliminates the lamented disadvantages of the above-described conventional methods and apparatuses.

Within the scope of this aim, the object of the present invention is to provide a re-splicer which allows the simple regulation of the thermal power in order to connect the edge strip to the plate.

Another object of the present invention is the realization of a banding apparatus which allows preheating.

Another object of the invention is to provide a banding apparatus which allows the attachment of banding of different heights.

Another object of the present invention is the realization of a banding apparatus which is more reliable than the conventional apparatuses described above.

Yet another object of the present invention is to provide a rewinder which requires less maintenance and remains efficient for a long time.

This object, as well as these and other objectives, which emerge more clearly from the following description, are achieved with a Umleimapparat according to the appended patent claim 1.

The detailed features of a stripper according to the invention are specified in the dependent claims.

A banding apparatus according to the present invention allows the gradual heating of the tape to be applied by allowing better control of the temperature and thermal power delivered to the tape as compared to conventional laser apparatuses.

Thus, with the banding apparatus of the present invention, banding bands can be processed in a wide variety of colors and efficient adhesion thereof to the panel edge, while reducing the risk of damage to the band itself.

The banding apparatus according to the present invention practically allows more uniform heating of the band to be applied to the plate edge as compared to the conventional solutions and the use of a lower specific power, so that the risk of burns and damage to the band itself is avoided.

Further features and advantages of the invention will become more apparent in the following description of a preferred but not exclusive embodiment of a banding apparatus according to the invention, illustrated in the non-limiting accompanying drawings, in which: - Figure 1 is a perspective diagram of a banding apparatus according to the present invention, in which some parts have been removed to make others more visible; Figure 2 shows a detail of the banding apparatus according to the present invention; Figures 3a and 3b show a band portion which has been hit by a Umleimappa rat emitted according to the present invention laser beams; Figures 4a and 4b show schematically two configurations of a banding apparatus according to the present invention.

There is shown in said figures a rewinder for attaching a shroud 100 to the edge 200a of a plate 200, said tape 100 having a thermoactivatable side 100a.

The rewinder includes a holding device, not shown, adapted to hold a plate 200, and a pressing device 11, adapted to press the tape 100 to an edge 200a of the plate 200.

The pressing device 11 defines for the belt 100 a feed direction C, which during operation corresponds to a longitudinal direction C ', along which the belt 100 extends.

In other words, the pressing device 11 during operation, the tape 100, which is supplied to it so that it is mounted on the edge 200 a of the plate 200.

The pressing device preferably comprises a roller, which is arranged with respect to the holding device so that the belt 100 is pressed against the edge 200a when the plate 200 is held by the holding device.

Of course, the Umleimapparat can be set for the linear or for the curved banding.

According to the present invention, the banding apparatus has a peculiarity in that it has a plurality of emitters 12 which are configured to emit laser beam bundles which are aligned so as to be incident upon a plurality of optical beams during operation of zones A of the thermally activatable side 100a of the belt 100, wherein the emitters 12 are arranged with respect to the pressing device 11 so that the zones A during operation along the feed direction C aligned zones.

In other words, during operation, the emitters 12 radiate onto the belt 100 in such a way that it is hit in zones A which follow one another, at least along the feed direction C.

The belt 100 runs in the feed direction C during operation so that the zones A pass along and gradually heat up the thermally activatable side 100a with which they coincide.

In fact, during its relative movement with respect to the emitters 12, each portion of the tape is sequentially struck by a plurality of zones A, so that the tape, in correspondence of each of them, receives a predetermined amount of heat by the laser radiation.

This heating is gradual and thus easy to control, and it allows to avoid the power densities typical for Umleimapparate with conventional lasers.

The emitters 12 are preferably arranged to form a matrix which emits laser beams which are suitable, during operation, to strike the thermally activatable side 100a of the belt 100 in the zones A, which preferably comprise zones which also extend along at least one transversely to a feed direction C extending trajectory B are aligned.

In other words, the emitters 12 are configured to dispense a plurality of laser beam bundles oriented to strike the thermally activatable side 100a of the belt 100 in a plurality of zones A that extend both longitudinally and transversely of the belt Feed direction C of the belt 100 are aligned.

A particularly efficient configuration provides that the trajectory B is preferably rectilinear and perpendicular to the longitudinal direction C '.

In this way, the zones A hit on the belt 100 during operation by the laser beam bundles are also aligned along the trajectory B which is perpendicular to the longitudinal direction C 'of the belt 100.

A banding machine according to the present invention is in practice functionally more flexible than the conventional solutions, since the distribution of the thermal power in the feed direction C of the belt 100 mutually longitudinally and transversely adjacent zones A allows a more uniform heating of the belt 100 as the conventional solutions, and the use of a lower specific power, so that the risk of burns and damage to the tape is avoided.

With a banding apparatus according to the present invention, practically bandages can be processed in a wide range of colors and efficient adhesion thereof to the panel edge, while at the same time reducing the risk of damage to the band itself.

In an embodiment of the present invention which allows a particular flexibility and compactness, the banding apparatus comprises a plurality of emitters 12 - which may be enclosed in a multi-bundle head 13 - which are preferably arranged in at least two rows and at least two columns, to irradiate the zones arranged correspondingly in at least two rows and at least two columns.

See, in particular, Figures 1 to 3a and 3b, which show, by way of example and not limitation, an embodiment of the present invention which is a preferred solution that provides a good compromise between tape heating size and capacity.

It comprises 8 emitters 12 arranged in two juxtaposed rows, each comprising 4 emitters 12, such that they are capable of forming two juxtaposed rows on the thermoactivatable side 100a, each of 4 second zones A. , as shown for example in Figures 3a and 3b.

In an embodiment which allows a particularly high flexibility of the banding apparatus, the banding apparatus is advantageously configured so that the emitters 12 can be selectively activated; To this end, the rewinder preferably includes a programmable and / or activatable controller for selectively activating the emitters 12 to modulate the extent of a portion of the tape 100 that is struck during operation by the beams emitted by the emitters 12.

The belt is heated during operation by the sequential action of the emitters 12 directed thereon.

An embodiment of the banding apparatus may, for example, be of the type of a linear feed type banding former of the plate 200 and the belt 100; in this case, it may have fixed emitters 12, as shown for example in FIG.

These may for example be arranged in two rows or columns of 4 emitters 12, as shown in Figures 1 and 2.

In this case, the belt 100 leading to the pressing device 11 is successively hit first by the beams generated by the first column of emitters 12 and then by the beams generated by the second column of emitters 12.

A larger number of possibly spaced columns of emitters 12 allows the fine modulation of the power density transmitted to the thermoactivatable side 100a of the tape 100 to surface units of this page.

In the preferred embodiment of the present invention, illustrated in Figures 4a and 4b, the emitters are grouped together in multi-beam mobile heads, identified by reference numerals 13a, 13b and 13c.

These multi-beam heads are selectively activatable and mobile with respect to the belt 100 so as to modulate the extension of a portion 100a of the belt 100 struck by the beams generated by the active multi-beam heads.

Specifically, as it is struck by the beams produced by one of these heads, the band is first struck by the beams produced by the emitters of the first column and then by the beams produced by the emitters of the second column.

In this way, the heating of the tape is gradual, substantially in stages, and temperature shocks of the tape are avoided.

A selective activation of the Mehrbündelköpfe 13 and / or the emitter 12 of the same allows, moreover, a fine, but easy regulation of the thermal power delivered to the band and thus a simple adjustment of Umleimapparats for attaching different colored bands or generally of bands with different thermal Admission.

For a particularly high application flexibility, the multi-bundle heads 13 advantageously comprise movement means 14 which are configured to move the emitters 12.

The moving means 14 are activatable to align the emitters 12 during operation to regulate the relative position with respect to the zones A along the height at the belt 100, thereby modulating the specific power transmitted to the belt 100 and / or the power Extension of a detected by the zones A part of the surface of the belt 100 is modulated.

Preferably, the moving means 14 are configured to move the emitters 12 so that their laser beam emission area is aligned with a rotational movement D and / or a longitudinal movement E such that the zones A on the belt 100 are parallel to the longitudinal direction C 'of the belt 100 extending direction and / or in a direction along the height of the band D' can be moved, that is perpendicular to the longitudinal direction C ', as shown for example in Figure 2.

In this way, the extent of the area of the band 100 hit by the beams emitted by the emitters of a multi-beam head 13 is adjustable.

This flexibility is further enhanced when the banding apparatus advantageously comprises positioning means, not shown, which are configured to move at least one of the multi-bundle heads 13.

The positioning means are activatable to align at least one multi-beam head 13 during operation to regulate during operation the relative position of the zones A over the length of the belt 100, thereby modulating the specific power transmitted to the belt 100 and / / or the extent of a portion of the surface of the belt 100 detected by the zones A is modulated.

In this way, it is possible to easily adapt the area hit by the beams emitted by the emitters 12 and thus to adapt the banding apparatus to apply bands of different colors or at different speeds, or different thicknesses, or again different high bands, as in the case of US Pat Cases 3a and 3b, in which two different high portions of the belt 100 can be seen, wherein the orientation of the emitter 12 was regulated by means of the movement means 14 so that the zones A are distributed along the band height, see Figure 3a, or are compacted, see Figure 3b.

A banding apparatus according to the present invention also makes it possible to easily adjust the relative speed of the belt 100 with respect to the multi-beam heads 13.

When this speed is low, the number of active multi-beam heads 13 can be reduced, and conversely, the number of active multi-beam heads 13 or the emitter thereof can be increased at high speed to maintain the power density transmitted to the belt 100 at a predetermined value ,

An embodiment which allows for particular flexibility in the activation of the multi-bundle heads 13 provides that the rewinder advantageously comprises drive means, not shown, for moving at least one of the multi-bundle heads 13 with respect to the position occupied by tape 100 during operation.

In particular, this flexibility is improved when the banding apparatus advantageously comprises positioning means configured to move at least one of the multi-bundle heads 13.

These positioning means are activatable to align during operation the multibeam head (s) 13 to regulate, during operation, the relative position of the zones A on the belt 100, thereby modulating the specific power transmitted to the belt 100 and / or the Extension of a detected by the zones A part of the surface of the belt 100 is modulated.

At least one of the multi-beam heads 13 has an emission direction of the laser beam emitted by said emitters 12 during operation, on a plane perpendicular to the longitudinal direction C 'of said belt 100, on the latter forming a right angle to the thermo-activatable side 100 on the belt 100 occurs.

Particular application flexibility arises with an embodiment of the present invention in which the positioning means are configured to be capable of rotating the multi-beam heads 13 with respect to the position occupied by the belt 100 during operation F and / or to proceed G.

In this way, the illustrated in Figures 4a and 4b configurations are possible.

The first of these figures shows a configuration in the case where a lower thermal performance is required (for example, in the case of a lower band), and therefore only the first 13a and the third 13c of the multi-beam heads 13 become active, and in this case the band 100 are advanced, while the second 13b is inactive and has moved back with respect to the latter.

If, starting from this configuration, a higher power is required for the band heating, for example when working with a higher band, then the drive means would be used to drive back the first 13a and the third 13c of the multi-beam heads 13, and the second 13b of the multi-beam heads 13 advanced and activated to obtain the ability to irradiate a larger area with the output from the emitters 12 beams.

In a particularly compact embodiment of the present invention, the banding apparatus has at least one of the emitters 12, but preferably all emitters 12, with the following components: at least one light emitting diode, i. an LED adapted to generate laser light; a light guide 15, preferably comprising or consisting of an optical fiber, having a diode-facing input region for receiving light radiation and an output region configured to project a laser light beam onto the belt 100.

A particularly efficient effect arises in the case where each emitter 12 further comprises a collimator 16 suitable for collimating a laser light beam connected to the output region of the light guide 15.

In one embodiment that allows for particular compactness and uniformity of irradiation of the belt 100, each of the multi-beam heads comprises a device in which the laser LEDs are mounted directly in a plurality of columns, each of which contains a plurality of LEDs ; a plurality of lenses positioned in front of each LED column to align and collimate their beams.

Preferably, a system for cooling the LEDs is provided, which can be due to the low power required according to the present invention, an air cooling, with a corresponding saving and simpler structure over the conventional solutions.

As has been stated, a banding apparatus according to the present invention has numerous advantages.

In particular, since damage to a single diode / emitter reduces the emitted radiation only slightly, in this case the system will continue to operate at slightly lower relative head-to-tape speeds.

The banding apparatus according to the present invention also has a very simple system structure, especially in the case of the linear banding configuration.

In a banding apparatus according to the present invention, the energy is distributed more efficiently than in the conventional single high power (also 2 kW) laser transported laser.

The ability to inexpensively commercially purchase already preassembled LED packages / arrays, which are capable of forming the multi-bundle heads and possibly can be stored in stock, also allows an optimization of the logistics management and maintenance of the Umleimapparats according to the present Invention.

The invention described is capable of many modifications and variants, all of which fall within the scope of the appended claims.

Furthermore, all the details of the invention may be replaced by technically equivalent elements.

In the practice of the invention, the materials used as well as the respective shapes and sizes can be varied as desired according to the respective requirements and the state of the art.

To the extent that the structural and technical features recited in the appended claims follow numerals or numbers, these reference numerals or numbers are inserted only for ease of understanding of the claims and therefore have no limiting effect on the design of each element, which is given by way of illustration only Example is characterized by such reference numerals or numbers.

Claims (8)

claims A banding apparatus for securing a shroud (100) to the edge (200a) of a plate (200), said band (100) having a thermally activatable side (100a), said apparatus comprising a holding device suitable for retaining a plate (200). 200), and a pressing device (11) adapted to press said band (100) against an edge (200a) of said plate (200); said pressing means (11) for said strip (100) defining a feed direction (C) with which, during operation, a longitudinal direction (C ') in which said strip (100) passes is coincident; said apparatus being characterized by having a plurality of emitters (12) configured to emit laser beams aligned to a plurality of thermally-activatable-side zones (A) during operation (100a) of said band (100), said emitters (12) being arranged with respect to said pressing means (11) such that said zones (A) comprise zones aligned along the direction of advance (C) during operation, said emitters (12) are arranged such that said zones (A) comprise zones aligned along at least one trajectory (B) transverse to a feed direction (C), the pasting apparatus comprising moving means (14) configured thereon to move said emitter (12), said movement means (14) being activatable to align said emitters (12) during operation to align the r regulate the relative position of said zones (A) along said trajectory (B) on said band (100), thereby modulating the specific power transmitted to said band (100) and / or extending one of said zones (A). A) detected portion of the surface of said band (100) is modulated. 2. A reing apparatus according to claim 1, characterized in that said at least one trajectory (B) is rectilinear and perpendicular to said longitudinal direction (C '). A reel-up apparatus according to any one of the preceding claims, characterized in that said emitters 12 are arranged in at least two rows and in at least two columns to irradiate said zones (A) arranged correspondingly in at least two rows and in at least two columns , A reing apparatus according to claim 3, characterized in that said emitters (12) can be selectively activated, said rewinder comprising a programmable and / or activatable control device (100) for selectively activating said emitters (12) to expand a portion of said band (100) hit during operation by the beams emitted by the emitters (12). Banding apparatus according to any one of the preceding claims, characterized in that it comprises drive means for moving at least one of said emitters (12) with respect to the position occupied by said band (100) during operation. A pasting apparatus according to any one of the preceding claims, characterized in that at least one of said emitters (12) has an emission direction which is perpendicular to the longitudinal direction C 'of said tape (100) forming a right angle to said thermoactivatable side (100a) is incident on said tape (100). A reel-up apparatus according to any one of the preceding claims, characterized in that it comprises positioning means configured to move at least one of said emitters (12), said positioning means being activatable to move said emitters (12) during operation to adjust the relative position of said zones (A) on said belt (100) along said feed direction (C) on said belt (100), thereby modulating the specific power transmitted to said belt (100) and / or the extent of a portion of the surface of said tape (100) detected by said zones (A) is modulated. A reel-up apparatus according to any one of the preceding claims, characterized in that at least one of said emitters (12) comprises: - at least one light-emitting diode adapted to generate laser light; a light guide (15) having an input region directed to said at least one diode for receiving light radiation and an output region configured to project a laser light beam onto said band (100). For this 2 sheets of drawings