EP2769815B1 - Device and process for coating workpieces - Google Patents

Description

Technical area

The present invention relates to a processing machine for processing, in particular coating, of workpieces, according to the preamble of claim 1. Such a processing machine is made EP2243619A1 known.

The present invention also relates to a method of coating workpieces using a device according to the preamble of claim 1. Such a method is also known EP2243619A1 known.

State of the art

In the field of furniture and component industry workpieces are often provided with a coating material, such as an edge band. Devices for coating such workpieces have a joining device for applying and / or activating an adhesive. Depending on the coating material, different joining technologies are suitable, so that it proves to be advantageous to provide several such joining technologies on a processing machine.

Thus, in the prior art in the EP 2 243 619 A1 discloses a device for coating workpieces with two joining devices for applying and / or activating an adhesive. This device further comprises a feed device for feeding a coating material to a joining device. In addition to the aforementioned advantages, it has proved to be disadvantageous with this device, however, that it is not possible with the feed device to equip both joining units during the processing machine operation with machine-supported coating material. Thus, for the change of joining technology, a stop of the machine is required, which makes the production process time and thus costly.

Presentation of the invention

It is therefore an object of the present invention to provide a device of the type mentioned, with the coating material to at least two joining devices during the processing operation in a simple and space-saving manner can be fed.

The object is achieved by the device of claim 1. Preferred embodiments will become apparent from the dependent claims.

The invention is based on the idea that coating material can be fed to at least two joining devices in a simple and space-saving manner during the machining operation, the joining devices and the feeding device being movable relative to one another during the machining operation, in particular with machine support (for example by servomotors). This either enables the joining device in operation to be moved towards the feed device in order to be fitted with coating material, while the other joining device is movable away from a potential collision area away from the feed device, or that the feed device to the individual joining devices is movable to supply them each coating material.

For this reason, the invention provides that the feeding device and / or joining devices are designed so that during the processing operation, in particular machine-based, relative movement between them can be realized to be able to perform with the feed coating material to the at least two joining devices. This allows easy loading of the joining devices with Coating material during the processing operation, which in turn bypasses a stop of the processing machine to change the joining technology and thus makes the production process more economical.

According to a further preferred embodiment, the conveying device has an elongate carrying device, with which the joining devices are connected, and which is displaceable in a direction of movement, preferably perpendicular to its direction of extent, relative to a workpiece to be machined. In this way, a relative movement between the processing or joining devices and the workpiece can be realized easily and inexpensively. Furthermore, a simple attachment for the joining devices is thus provided, which leads to a small construction space and a low machine complexity with low system costs.

According to a further embodiment, the carrying device has a guide device, via which the joining devices are connected to the carrying device. In this case, the guide device is designed so that the joining means are displaceable relative to the support means. This leads to the advantage that with the joining devices workpiece areas in spatial directions that are different from the direction of movement of the support device can be reached. This results in increased processing variability and enables multi-dimensional machining of the workpieces.

According to a further particularly preferred embodiment, the guide device is in this case set up such that the joining devices can be moved coupled to one another in the longitudinal direction of extension of the carrying device. In addition, the joining devices in a further direction, preferably perpendicular to the longitudinal direction and the direction of movement of the Carrying device, relative to the feeder displaceable. This leads to a simple machine design, since the support means for the displacement along the longitudinal direction of the support means can be used as a guide. Furthermore, an increased number of spatial positions can be approached by the third degree of freedom of displacement perpendicular to the direction of elongation and the direction of movement of the carrying device and moreover a relative movement between the joining devices and the workpiece can be realized in a third spatial direction, which leads to an enlarged possible processing spectrum. The coupling of the at least two joining devices in the longitudinal direction of the support device also results in that the machine structure has a low complexity, since only one carriage for the movement of the at least two joining devices in this direction is required, what the number of components and thus the system complexity and system costs reduced.

According to a further preferred embodiment, the carrying device has two guide devices, via each of which a joining device is connected to the carrying device. The guide means are designed so that the joining means are independently displaceable relative to the support means. This leads to the advantage that an increased processing variability is realized, since the at least two joining devices can, for example, perform machining operations on the workpiece independently of one another or can be equipped with coating material independently of one another.

According to a further particularly preferred embodiment, the joining devices are designed such that they pass across the feed device and / or under the feed device and / or laterally on the Feeding past are displaced. This leads to the advantage that with the one feed device, the at least two joining devices can be fitted in a simple manner. Thus, a joining device can be moved past the feed device so that the other feed device can be loaded. This results in a simple machine structure and a small installation space required.

In accordance with a further particularly preferred embodiment, the joining devices are arranged one behind the other in relation to the longitudinal direction of extension of the carrying device. This leads to the advantage that the load which is exerted by the joining devices on the support means is relatively small, since this arrangement, the leverage of the center of gravity of the joining means is kept small. This leads to lower load bearing loads and thus a smaller space required.

According to a further preferred embodiment, the joining devices are arranged on the same side of the carrying device and arranged side by side with respect to the longitudinal extension of the carrying device. This leads to the advantage that the travel range of the guide device (s) on which the joining devices are mounted, and the travel range of possibly further devices which are mounted on the carrying device, along the longitudinal direction of the support means is increased, resulting in an increased processing variability leads.

According to a further preferred embodiment, the feed device is arranged next to a longitudinal side of the workpiece support. This in turn leads to the advantage that the processing area of the workpiece as well as the movement ranges of the joining devices by the feed device not be restricted, resulting in a simple machine structure with increased processing variability.

According to a further preferred embodiment, the feed device is attached to an end face of the carrying device. This allows a simple and fast assembly of the joining devices with coating material, which leads to an increased production productivity. This is due to the fact that only a displacement of the joining means relative to the support means is required for the assembly of the joining means with coating material and no displacement of the support means relative to the workpiece holder, since the feeding device is coupled in the direction of displacement of the support means with the joining means.

According to a further preferred embodiment, the feeding device, which is attached to an end face of the carrying device, is displaceable perpendicular to the longitudinal direction of the carrying device and in particular along the joining devices. In this way, a simple and fast assembly of the joining devices with coating material is possible, which leads to an increased production productivity.

According to a further preferred embodiment, the device has a further feed device, which is arranged opposite to the workpiece holder of the other feed device. In this way, in particular for the case in which the device has two guide devices, each with a joining device, an independent loading of the joining devices with coating material is possible. This enables improved machining productivity and thus lower unit costs.

According to a further preferred embodiment, this further feeding device is attached to an end face of the carrying device. This leads to the same advantages as those for the mounting of the other feeding device on an end face of the carrying device.

According to a further preferred embodiment, the device further comprises at least one processing device, in particular chip processing device, which is preferably connected movably and particularly preferably on the opposite side of the joining devices with the carrying device. This embodiment has the advantage that machining operations can be carried out with the same apparatus in addition to the coating. Thus, no additional machining device is required, resulting in a small installation space of the entire machine system (coating and cutting device), a low machine complexity and low system costs.

Brief description of the drawings

• Fig. 1a shows a plan view of a first embodiment of the present invention in a basic position. Fig. 1b shows a plan view of a first embodiment of the present invention in a loading position.
• Fig. 2 shows a plan view of a second embodiment of the present invention in a basic position.
• Fig. 3 shows a plan view of a third embodiment of the present invention in a basic position.

Detailed description of preferred embodiments

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings Drawings described. Other variants or modifications may be combined with each other to form further embodiments.

Embodiment 1

Fig. 1a and Fig. 1b shows a plan view of a first preferred embodiment of the present invention. The processing machine 1 of the first preferred embodiment is here a CNC machining center (BAZ) for coating and machining of workpieces.

The workpieces are at least partially made of wood, wood materials, plastic or the like, as used for example in the field of furniture and component industry. These can be a wide variety of materials, such as solid wood or chipboard, lightweight panels, sandwich panels, skirting boards, profiles for profile coating, etc. It should be noted, however, that the present invention is not limited to such workpieces.

The machining center comprises an elongate machine bed 2, an elongate table 3 arranged thereon and a carrying device 4, which in the present preferred embodiment is designed as a driving portal. Here it is also conceivable that the table and / or the machine bed are round, in particular circular, square or polygonal, etc. are configured.

The driving portal 4 is guided through the machine bed 2 and is movable in a direction X relative to the table 3. It has a bar-shaped form, extends perpendicular to the longitudinal extent of the table 3 and is arranged symmetrically to this. In this case, the driving portal 4 is designed such that it extends beyond the table 3 on both sides. Here are also a non-symmetrical arrangement the driving portal 4 to the table 3 and / or an arrangement in the longitudinal direction of the table 3 conceivable. In the present embodiment, the driving portal 4 is mounted on both sides of the table 3 on the machine bed 2 and is guided by this. However, here are also other designs, such as a cantilever design, a linear portal design or a device with multiple arms and / or portals conceivable. Furthermore, it is possible that the portal 4 is arranged stationary and the table 3 or the machine bed 2 is displaceable relative to the portal 4. It is also conceivable that the table 3 and / or the machine bed 2 designed to be rotatable.

In this preferred embodiment, a feed device 5 is permanently mounted on an end face of the portal 4. The feeding device 5 comprises an edge roller magazine 5a for providing a coating material, here an edge band, and a pre-apron station 5b for capping the coating material. Here is also a roll holder, a cassette system or "rod product" for the provision of the coating material denkbar.Dabei the feeder 5 is designed so that the edge band is guided out of the edge roll magazine 5a by an approximately 90 ° curve, so that it from the feeder. 5 is output in the direction of the longitudinal extension direction of the portal 4.

In this case, the feed device 5 of the present embodiment is set up to be able to supply a plurality of different coating materials. The coating material may, for example, be an edge material for a narrow surface of the workpiece, but also a covering material for a wide surface or any other arbitrary surface of the workpiece. The edge roll magazine 5a of the feeder 5 contains a supply of coating material, which may consist of different materials, such as Plastic veneer, paper, cardboard, metal etc. and various combinations thereof. In this case, the coating material may be provided as described above in a roll form but also in the form of individual sections.
In the present embodiment, the coating material is provided with a functional layer which unfolds adhesive properties by energy input (for example heating or laser radiation), so that the coating material can be joined to the workpiece via the functional layer. In this case, the functional layer may comprise means for increasing the thermal conductivity, such as polyolefins and / or metal particles. Furthermore, the functional layer can have absorbers for laser light or other radiation sources. Alternatively, however, the functional layer may also be supplied separately between the coating material and the workpiece, or may already be provided on the surface of the workpiece to be coated.

In addition, the machining center of the first preferred embodiment has two joining devices V1, V2, in particular glueing units, which are mounted on the portal 4 via a guide device 6. The guide device 6 in this case comprises a carriage 6a on which both joining devices V1, V2 are mounted and over which they are displaceable in a Y2 direction along the longitudinal extension of the portal 4. Further, the guide means 6 comprises two decoupled vertical slide 6b, 6c, via which in each case a joining unit V1, V2 is fixed to the carriage 6a so that it is displaceable in a height direction, ie perpendicular to the X and Y2 direction. Thus, in this first preferred embodiment, both joining devices V1, V2 coupled to each other in the Y2 direction and independently in the height direction displaced. In this case, the displacement stroke of the individual directions is configured such that the joining device V1 is displaceable in the Y2 direction via the feed device 5, as in FIG Fig. 1b shown. Again, alternatives are possible, such as an embodiment in which the joining device V1 and / or the joining device V2 below the feeder 5 through or laterally on the feeder 5 are displaced past. The displacements in the individual directions are driven in the present embodiment via actuators and are also CNC controlled.

The joining devices V1, V2 each comprise a pressing device, for example a pressure roller, belts or shoes, which presses the coating material against the surface of the workpiece. Furthermore, the joining devices V1, V2 comprise an energy source for applying energy to the functional layer of the coating material. In the present embodiment, the joining devices V1, V2 each have different types of energy sources. However, it is also possible here for both joining devices V1, V2 to have the same type of energy source.

In the context of the present invention, a great variety of energy sources come into consideration, such as lasers, infrared sources, ultrasound sources, magnetic field sources, microwave sources, plasma sources, fumigation sources, etc. All of these energy sources provide energy in directed form and direct it to the functional layer. The operation of the energy sources is controlled by a control device, this control particularly adapts the energy to the materials used and the feed rate. Here is also a scheme that controls based on various sensor signals, such as temperature measurements or illuminance measurements, the energy sources.

The joining devices V1, V2 are connected to the guide device 6 via a spindle unit, so that they are rotatably mounted about their own axis. Here is the connection designed via an interface so that the joining units V1, V2 are interchangeable. The interface may, for example, be a universal interface as described in the patent application
EP 0 743 139 the applicant is disclosed.

The preferred present embodiment further comprises two processing devices B, S, which are arranged with respect to the portal 4 the joining devices V1, V2 on the portal 4 opposite. The processing devices B, S are displaceable along the portal in a direction Y1. Corresponding to the joining devices V1, V2, the processing devices B, S are mounted on the portal via slides, so that they can be displaced both in the longitudinal direction of the portal and in a height direction of the portal. In this case, a shift of the processing device B, S in the height direction is possible independently. The processing devices B, S are each connected via an interface with a spindle unit, so that the processing devices B, S are designed to be rotatable and replaceable about their own axis. In the present embodiment, in each case a drilling and a milling tool are provided, but here are any other tools conceivable.

As in Fig. 1b In the present preferred embodiment, both joining devices V1, V2 can be equipped with coating material via the feed device 5. This is made possible by the fact that the joining device V1 in the height direction is adjustable so that it can be moved across the feed device 5, so that the joining device V2 can be equipped with coating material by the feed device 5.

Embodiment 2

Hereinafter, a second preferred embodiment of the present invention will be described with reference to the accompanying drawings Fig. 2 described. It will be discussed in detail only on those points that differ from the embodiment 1.

Fig. 2 shows a second preferred embodiment in which, unlike the first preferred embodiment, the joining means V1, V2 are arranged with respect to the longitudinal direction of the portal 4 in a row. In this case, the carriage 6a of the guide device 6 is designed so that it has a right angle with two legs of approximately equal length. The first leg 6a.1 is connected to the portal 4 and the second leg 6a.2 serves as a receptacle for the joining devices V1, V2, which are mounted in each case via slide 6b in the height direction adjustable on the carriage 6a.

Furthermore, the feed device 5 is attached via a further slide on the front side of the portal 4, so that the feed device 5 in a direction of movement R, which is displaceable perpendicular to the extension direction of the portal Y and the extension direction of the table X. The feeding device is set up in such a way that it has a displacement stroke, so that both joining units V1, V2 can each be equipped successively with coating material. Here, it is also conceivable to arrange two feeders side by side, with each other or one above the other, over which both joining devices V1, V2 can be equipped simultaneously with coating material.

Embodiment 3

Hereinafter, a third preferred embodiment of the present invention will be described with reference to the accompanying drawings Fig. 3 described. It is only on such points discussed in detail, which differ from the embodiment 1.

In contrast to the first preferred embodiment, the third preferred embodiment has two guide devices 6.1, 6.2, on each of which a joining device V1, V2 is adjustably mounted in a height direction via a carriage. The guide means 6.1, 6.2 are thus independently along the longitudinal extent of the portal 4 in a Y2 and Y3 direction and independently displaceable in a height direction.

Furthermore, the processing device 1 of the third particularly preferred embodiment comprises a further feed device 7, which is configured according to the first feed device 5, and is fixedly mounted on an end face of the portal 4, opposite the first feed device 5.

Thus, the joining devices V1, V2 in the third preferred embodiment can be equipped independently with different feed devices 5, 7 successively or simultaneously with coating material. Likewise, in this embodiment, however, it is also possible to assemble both joining devices V1, V2 with only one feed device 5 or 7.

Claims (14)

1. Processing machine (1) for processing workpieces of which at least a portion or portions is or are preferably composed of wood, engineered wood, plastics materials or the like, having
   a workpiece support (3) to receive a workpiece to be processed,
   at least two joining means (V1, V2) for joining a coating material to the workpiece to be processed,
   a conveying means for producing a relative movement between at least one joining means (V1, V2) and the workpiece to be processed,
   an infeed means (5) for feeding in the coating material,
   characterised in that
   the infeed means (5) and the joining means (V1, V2) are movable relative to one another during the processing operation, both the joining means (V1, V2) thus being able to be loaded with coating material by the infeed means (5).
2. Processing machine (1) according to claim 1, wherein the conveying means has an elongated carrying means (4) to which the joining means (V1, V2) are connected and which is displaceable relative to the workpiece to be processed in a direction of movement (X), preferably perpendicularly to the direction in which said elongated carrying means (4) extends.
3. Processing machine (1) according to claim 2, wherein the carrying means (4) has a guiding means (6), by means of which the joining means (V1, V2) are connected to the carrying means (4) and which is so designed that the joining means (V1, V2) are displaceable relative to the carrying means (4).
4. Processing machine (1) according to claim 3, wherein the guiding means (6) is so adapted that the joining means (V1, V2) are coupled together in the direction (Y) of the longitudinal extent of the carrying means (4) and are displaceable relative to the infeed means (5), independently of one another, in a further direction and preferably perpendicularly to the direction (Y) of the longitudinal extent of the carrying means (4) and to the direction of movement (X) thereof.
5. Processing machine (1) according to claim 2, wherein the carrying means (4) has two guiding means (6.1, 6.2) by means of which respective joining means (V1, V2) are connected to the carrying means (4) and which are so designed that the joining means (V1, V2) are displaceable relative to the carrying means (4) independently of one another.
6. Processing machine (1) according to claim 5, wherein the guiding means (6.1, 6.2) are so adapted that the joining means (V1, V2) are displaceable relative to the infeed means (5) independently of one another in the direction (Y) of the longitudinal extent of the carrying means (4) and independently of one another in a further direction and preferably perpendicularly to the direction (Y) of the longitudinal extent of the carrying means (4) and to the direction of movement (X) thereof.
7. Processing machine (1) according to one of claims 3-6, wherein at least one of the joining means (V1, V2) is displaceable over the top of the infeed means (5) and/or through below the infeed means (5) and/or past the infeed means (5) laterally.
8. Processing machine (1) according to one of claims 2-7, wherein the joining means (V1, V2) are arranged on the same side of the carrying means (4) and one behind the other relative to the direction (Y) of the longitudinal extent of the latter.
9. Processing machine (1) according to one of claims 2-7, wherein the joining means (V1, V2) are arranged on the same side of the carrying means (4) and next to one another relative to the direction (Y) of the longitudinal extent of the latter.
10. Processing machine (1) according to one of the preceding claims, wherein the infeed means (5) is arranged next to a longitudinal side of the workpiece support (3) and preferably at an end-face of the carrying means (4).
11. Processing machine (1) according to claims 9 and 10, wherein the infeed means (5) is displaceable perpendicularly to the longitudinal extent (Y) of the carrying means (4), and in particular along the joining means (V1, V2).
12. Processing machine (1) according to one of claims 9-11 having a further infeed means (7) which is arranged, in an opposite position from the other infeed means (5) relative to the workpiece support (3) and preferably at an end-face of the carrying means (4).
13. Processing machine (1) according to one of claims 2-12, also having at least one machining means (B, S), and in particular a means for stock-removing machining, which is preferably movable and as a particular preference is connected to the carrying means (4) on the same side as or the opposite side from the joining means (V1, V2).
14. Process for coating workpieces using a machine according to one of claims 1 to 13, wherein at least one of the two joining means (V1, V2) is loaded with coating material by the infeed means (5) and/or the other of the at least two joining means (V1, V2) is so loaded.

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