DEVICE AND METHOD FOR APPLYING A CUT TO A SUPPORT

Description

[0001] The invention relates to a device for applying cutouts according to the preamble of claim 1.

[0002] Furthermore, the invention relates to a method for applying blanks according to the preamble of claim 11.

[0003] From DE 103 01 837 A1, a device and a method for applying blanks to a carrier supplied along a transport path are known. The device has a cutting roller with blades for producing blanks from a web of material, the web being fed tangentially to the cutting roller. Downstream of the cutting roller in the conveying direction is a vacuum drum to which the blanks are transferred. The vacuum drum conveys the blanks to a side opposite an axis of the vacuum drum, where the blanks are taken over by the carrier and transported further. The carrier is designed as a carrier material provided with an adhesive layer and is operated at a higher transport speed than the rotational speed of the vacuum drum. The blanks are designed as wound dressings, which are transferred by the vacuum roller to the ribbon-shaped carrier.After subsequent singulation, the paving stones are produced. Since the backing is ribbon-shaped, a flush alignment between the cut piece and the backing is not necessary.

[0004] From DE 103 01 837 A1, a method for manufacturing plasters is known in which die-cut wound dressings are transferred to a vacuum roller. The vacuum roller transfers the wound dressings onto a ribbon-like carrier material, the conveying speed of the carrier material being higher than the rotational speed of the vacuum roller. A flush transfer to the carrier is not disclosed.

[0005] From DE 10 2014 223 594 A1, a device for applying blanks to a carrier is known. The device comprises a cutting roller integrated into a vacuum drum. Furthermore, the device includes a metering unit comprising a feed roller and a control unit for controlling the feed roller. The feed speed of the feed roller can be set so that the feed roller rotates synchronously with a working cycle of the cutting roller. In this way, slippage is created between the produced blanks, allowing the blanks to be transferred successively onto different, preferably cylindrical, carriers.

[0006] The object of the present invention is to provide a device and a method for applying blanks to carriers provided along a transport track in such a way that the blanks are transferred flush with the carriers provided on the transport track.

[0007] To solve this problem, the invention has the features of claim 1.

[0008] According to the invention, a metering device is provided by means of which the conveying speed of a material web fed to a cutting roller and a vacuum drum is controlled such that the blanks are transferred from the vacuum drum to individual carriers positioned along a transport track, creating a gap or offset between them. The offset or distance between the blanks is selected such that the blanks can be transferred to the respective carriers with a flush finish to the edges of the carriers arranged on both the downstream and upstream sides of the conveying stream. Advantageously, this allows blanks to be produced from a ribbon-like material web, arranged offset from one another, and transferred sequentially to the carriers moving along a transport track by means of the vacuum drum with a flush finish to the carriers.If the substrates are designed as flooring panels and the cut pieces as impact sound insulation membranes, flooring products can be manufactured in this way with layers that are flush against each other, without the need for any further cutting. Any offset that would otherwise occur between the cut pieces and the flooring panels would lead to small, undesirable dents after the flooring products are laid.

[0009] According to a preferred embodiment of the invention, the metering device comprises a metering roller arrangement that can be controlled such that a slip is generated on the material web clamped between the cutting roller and the vacuum drum, which determines the distance between the blanks and corresponds to the distance between two sequentially supplied carriers. Preferably, the rotational speed of the metering roller arrangement is briefly reduced compared to the vacuum drum and the cutting roller, so that the conveying speed of the transport web is reduced, which, due to the clamped arrangement of the transport web, leads to the desired slip.The comparatively lower rotational speed of the metering roller assembly and the transport track, which is already in frictional contact between the cutting roller and the vacuum drum, allows for precisely adjustable slippage, resulting in an increased distance between the blanks adhering to the vacuum drum. The distance between a first blank and a second blank positioned in front of it in the conveying direction corresponds to the distance between a first carrier and a second carrier positioned in front of it in the transport direction. Advantageously, a flush transfer or connection of the blanks with the sequentially supplied carriers can be achieved easily.

[0010] In a preferred embodiment of the invention, the material web is fed tangentially to the cutting roller and the vacuum drum. A line connecting a rotational axis of the vacuum drum and a rotational axis of the cutting roller defines a cutting point of the device, at which a blade of the cutting roller cuts the material web. Since the vacuum drum has a larger diameter than the cutting roller, the contact point of the material web on the vacuum drum is located behind the cutting point in the conveying direction. The cut is thus made at the cutting point of the material web, while a portion of the material web further back in the conveying direction is already adhering to the vacuum drum. In this way, a relative displacement of the cut edge of the material web on the vacuum drum can be achieved simply by reducing the rotational speed of the metering roller assembly.

[0011] According to a further development of the invention, the device includes conveyor control means such that the peripheral speed of the vacuum drum is synchronized with the transport speed of the conveyor. Advantageously, this allows the blanks to be continuously transferred to the carriers.

[0012] According to a further development of the invention, the diameter of the vacuum drum is at least twice that of the cutting roller. The greater the diameter ratio between the vacuum drum and the cutting roller, the greater the distance between the cutting point and the contact point. If the distance between the contact point and the cutting point is relatively large, the conveying speed of the metering roller assembly must be significantly reduced to generate the desired slippage. If the distance between the contact point and the cutting point is relatively small, a reduction in the rotational speed of the metering roller assembly can undesirably cause the material web to detach from the vacuum drum. The diameter ratio between the vacuum drum and the cutting roller is selected such that the desired slippage is generated by a brief reduction in the rotational speed of the metering roller assembly.

[0013] According to a further development of the invention, the vacuum drum has an embedded rubber strip which interacts with the knife of the cutting roller to effect the desired cut of the material web at the cutting point.

[0014] To solve the problem, the invention has the features of claim 11.

[0015] The advantage of the method according to the invention is that by applying a tensile force to a section of a material web adhering to a vacuum drum, a predetermined increase in the distance between the resulting front edge of the material web and a rear edge of a blank adhering to the vacuum drum in the conveying direction can be achieved. With further rotation of the vacuum drum and the cutting roller, the length of the adhering section increases. By performing a further cut, a rear edge of the blank is formed, so that the blank is now complete and, with full surface contact against the vacuum drum, is moved into the transfer position to the carrier. Advantageously, this allows for a simple and defined adjustment of the distance between blanks sequentially provided on the vacuum drum.

[0016] According to a preferred embodiment of the invention, the tensile force acting on the material web occurs during frictional contact of the adhering portion of the material web between the vacuum drum and the cutting roller. The leading portion of the material web is thus clamped in a defined manner between the vacuum drum and the cutting roller, so that a defined slip is generated by the tensile force after the trailing edge of the blank (in the conveying direction) has been cut. The slip thus acts on the portion of the material web running between a cutting point and the trailing contact point (in the conveying direction). The force therefore acts on a region of the adhering portion that lies on a line connecting a rotational axis of the vacuum drum and the cutting roller, i.e., tangentially to both the vacuum drum and the cutting roller.Therefore, the tensile force must be greater than the frictional force acting radially on the section of the material web by the vacuum drum and the cutting roller.

[0017] According to a further development of the invention, the duration of the tensile force depends on the set slip, which acts on the desired spacing of the blanks sequentially adhering to the vacuum drum. Preferably, the tensile force acts on the material web for such a long time that the adhering section is displaced against the conveying direction by a distance to a blank already adhering to the vacuum drum downstream. The feeding of the material web to the vacuum drum and the cutting roller is thus effectively delayed by a time offset, whereby a leading edge of the section adhering to the vacuum drum, formed in this way, moves relative to the vacuum drum.

[0018] Further advantages of the invention will become apparent from the further dependent claims.

[0019] An embodiment of the invention is explained in more detail below with reference to the drawings.

[0020] They show: Fig. 1 a schematic side view of a device according to the invention at the time of a rear edge of a blank being produced by cutting, Fig. 2 the side view of the device according to the invention at the time of generating a tensile force on a material web which is fed to a vacuum drum and a cutting roller, Fig. 3 the schematic side view of the device at the time of the cessation of the tensile force on the transport web, whereby a gap is formed between a front edge of the material web and the blank at the front in the conveying direction, and Fig. 4 the schematic side view of the device at the time of a further cut of the material web to form a rear edge of the blank.

[0021] A device for applying blanks Z1, Z2, Z3 onto carriers 2 provided along a transport track 1 essentially comprises a vacuum drum 3, a cutting roller 4 and a metering device 5.

[0022] The supports 2 are preferably designed as floor covering panels, which are fed tangentially to the vacuum drum 3 along the preferably linear or straight transport path 1. Each support 2 has a length lT extending in the transport direction 6. The supports 2 are transported at a constant transport speed, with supports 2 arranged one behind the other in the transport direction 6 maintaining a distance a between them. A leading edge 7 of a support 2 in the transport direction 6 always maintains the same distance a to a trailing edge 8 of the support 2 transported in front of it in the transport direction 6.

[0023] Conveyor control means are provided so that the carriers 2 are transported tangentially along the transport path 1 onto the vacuum drum 3 at a transport speed that corresponds to a circumferential speed v V of the vacuum drum 3.

[0024] Conveyor control means are provided so that the vacuum drum 3 is operated at the same rotational speed as the cutting roller 4.

[0025] As from Figure 1As can be seen, the material web 25 is fed tangentially to the vacuum drum 3 and the cutting roller 4. The material web 25 is clamped between the cutting roller 4 and the vacuum drum 3. The metering device 5 is arranged downstream of the vacuum drum 3 and the cutting roller 4 in the conveying direction 9. The metering device 5 comprises a metering roller assembly 10 with a metering roller 11 and a linear actuator 12 acting on the metering roller 11. A deflecting roller 13 is arranged upstream of the metering roller 11, at which the material web 25 is deflected by 90° before it reaches the metering roller 11. The material web 25 is also deflected by 90° at the metering roller 11. The metering roller 11 is arranged such that the material web 25 is fed tangentially to the vacuum drum 3 and the cutting roller 4.

[0026] The following will be based on the Figures 1 to 4 The production of a Z3 blank is described.

[0027] In the Figure 1 At the depicted point in time, the vacuum drum 3 and the cutting roller 4 are in a rotational position relative to each other such that a blade 14 of the cutting roller 4 engages in a recessed rubber strip 15 arranged on a circumferential surface of the vacuum drum 3. At this point in time, the transport path 1 is cut.

[0028] The vacuum drum 3 and the cutting roller 4 are rotated in opposite directions by appropriate conveying control means. During the cutting process, the knife 14 and the rubber strip 15 define a cutting point 16, which is located on an imaginary connecting line V that links a rotational axis 17 of the vacuum drum 3 with a rotational axis 18 of the cutting roller 4.

[0029] It is evident that the diameter dV of the vacuum drum 3 is larger than the diameter dS of the cutting roller 4. In the present embodiment, the diameter dV of the vacuum drum 3 is more than twice the diameter dS of the cutting roller 4; preferably, the diameter dV of the vacuum drum 3 is four times the diameter dS of the cutting roller 4.

[0030] Out of Figure 1It is evident that when the material web 25 is cut at the cutting point 16, a downstream rear edge 19 of the blank Z2, which is already fully adhered to the vacuum drum 3, and simultaneously a downstream front edge 20 of the blank Z3 to be produced are created. The blank Z2, located in the conveying direction 9 in front of the blank Z3, extends further, fully adhering to the vacuum drum 3, to a transfer point 21 of the vacuum drum 3, which is offset by 90° from the cutting point 16. The transfer point 21, like the cutting point 16, is located on the circumferential surface of the vacuum drum 3. At the transfer point 21, the blanks Z1, Z2, and Z3 are transferred to the carriers 2. The length lZ of the blanks Z1, Z2, Z3 is therefore less than a quarter of the circumferential area of ​​the vacuum drum 3. Furthermore, the length lZ of the blanks Z1, Z2, Z3 corresponds to the length lT of the carriers 2.

[0031] It is understood that the vacuum drum 3 has a multitude of small air channels that are embedded perpendicular to the surface of the vacuum drum 3. In this way, the blanks Z1, Z2, Z3 or a partial section 22 of the material web 25 adhering to the vacuum drum 3 are held against the circumferential surface of the vacuum drum 3.

[0032] Out of Figure 1 It is evident that at the time of the cut, the material web 25 is already adhering to the vacuum drum 3 upstream of the cutting point 16, specifically to a contact point 23 of the vacuum drum 3. The cutting point 16 and the contact point 23 on the circumferential surface of the vacuum drum 3 form an acute angle φ. The contact point 23 is located downstream of the cutting point 16 in the conveying direction 9 and forms the initial point of contact between the material web 25 and the vacuum drum 3.

[0033] As from Figure 1As can be seen, the blank Z1, which is positioned in the conveying direction 9 in front of its blank Z2, is already in the area of ​​the transfer point 21, where it is transferred flush with the approaching carrier 2. For this purpose, the carriers 2 each have an adhesive layer (not shown) so that the carriers 2 and blanks Z1, Z2, Z3, which are fed flush to each other, are joined flush with each other both downstream and upstream of the conveying flow. A front edge 20 of the blanks Z1, Z2, Z3 is flush with a front edge 7 of the carriers 2. A rear edge 19 of the blanks Z1, Z2, Z3 is flush with the rear edge 8 of the respective carriers 2.

[0034] To the in Figure 1 At the time shown, the dosing device 4 is controlled by means of a conveying control device at the same rotational speed as the vacuum drum 3 and the cutting roller 4.

[0035] After further rotation of the vacuum drum 3 and the cutting roller 4 by an acute angle in a rotational position according to Figure 2The linear actuator 12 is actuated, i.e., extended, thus reducing the rotational speed of the metering roller 11. This creates a tensile force FZ opposite to the conveying direction 9, resulting in a slip s on the section 22 adhering to the vacuum drum 3. The conveying speed of the material web 25 is thereby reduced, increasing the distance between the front edge 20 of the material web 25 and the rear edge 19 of the blank Z2, until the slip s corresponds to the distance a between two sequentially arranged carriers 2. As soon as the predetermined slip s is reached, the linear actuator 12 is deactivated, i.e., moved away from the metering roller 11, with the result that the metering roller 11 again has the same rotational speed as the vacuum drum 3 and the cutting roller 4.The material web 25 can thus be moved further between the vacuum drum 3 and the cutting roller 4 at the same speed while adhering to the vacuum drum 3, see . Figure 3 The specified slip value s is therefore set.

[0036] As soon as another knife 14 of the cutting roller 4 is positioned with another rubber strip 15 of the vacuum drum 3 on the connecting line V, the next cut takes place, by means of which a rear edge 24 of the blank Z3 is created. The blank Z3 in Figure 4 now has the same position as the Z2 section in Figure 1 By further rotating the vacuum drum 3 and the cutting roller 4, the cuts already described and the deceleration of the material web 25 are repeated.

[0037] The slippage s corresponds to a distance between the rear edge 19 of the blank Z2 and the front edge 20 of the blank Z3. In the present embodiment, the slippage s corresponds approximately to the distance between the contact point 23 and the cutting point 16 of the vacuum drum 3. The angle φ is only a few degrees, for example 2° to 5°.

[0038] Essential for generating the slip is that the front section 22 of the transport track 1 is in contact with the vacuum drum 3 while the tractive force FZ is applied.

[0039] If the material web 25 is not fed tangentially to the vacuum drum 3, but at a comparatively smaller angle to the circumferential surface of the vacuum drum 3, the tensile force FZ can also be applied earlier in time, for example immediately after the cutting of the material web 25.

[0040] In the present embodiment, the adhering section 22 of the material web 25 is clamped between the vacuum drum 3 and the cutting roller 4, with frictional contact between the section 22 on the one hand and the vacuum drum 3 and the cutting roller 4 on the other. The tensile force FZ must therefore be greater than the frictional force FR acting on the adhering section 22. It is understood that the length lZ of the blanks Z1, Z2, Z3 is less than the length of a circumferential area between two rubber strips 15 of the vacuum drum 3 arranged one behind the other in the conveying direction. If the blanks Z1, Z2, Z3 and the carriers 2 are to be longer, the number of rubber strips 15 or the number of knives 14 on the cutting roller 4 would have to be reduced accordingly.

[0041] Alternatively, the tensile force FZ can also act on the section 22 if the section 22 only contacts the vacuum drum 3 at the cutting point 16. In this case, the tensile force FZ is counteracted exclusively by the frictional force FR generated by the frictional contact between the vacuum drum 3 and the cutting roller 4; this occurs without the additional static friction of the section 22 on the vacuum drum 3.

Claims

1. A device for applying cutouts (Z1, Z2, Z3) to a support (2), - comprising a cutting roller (4) containing a number of blades (14) for producing the cutouts (Z1, Z2, Z3) from a material web (25), - comprising a vacuum drum (3) which is associated with the cutting roller (4) and by means of which the cutouts (Z1, Z2, Z3), while adhered to the vacuum drum (3), are transferred onto the support (2) provided in a transport path (1), and comprising a metering device (5) which influences a conveying speed of the material web (25) in such a way that the cutouts (Z1, Z2, Z3), produced by means of the cutting roller (4) and adhered to the vacuum drum (3) in a manner offset from one another by a distance (s), are transferred from said vacuum drum onto the separated supports (2) provided in a manner offset from one another by a distance (a) along the transport path (1), characterized in that the metering device (5) includes a metering roller (11) and a linear actuator (12) for reducing a rotational speed of the metering roller (11) such that a tensile force (Fz) counter to a conveying direction (9) is produced, and in that the cutouts (Z1, Z2, Z3) are each transferred to the supports (2), the cutouts (Z1, Z2, Z3) being arranged flush with the supports (2) both on the downstream and upstream sides.

2. The device according to Claim 1, characterized in that the metering device (5) is arranged on the upstream side of the cutting roller (4) and the vacuum drum (3), and in that the metering device (5) includes a metering roller assembly (10) which can be controlled in such a way that the material web (25) clamped between the cutting roller (4) and the vacuum drum (3) is delayed by a slippage (s) relative to a circumferential surface of the vacuum drum (3), said slippage specifying the distance between the cutouts (Z1, Z2, Z3) and corresponding to the distance (a) between two sequentially provided supports (2).

3. The device according to Claim 1 or 2, characterized in that the metering device (5) is arranged in such a way that the material web (25) is supplied tangentially to the vacuum drum (3) and the cutting roller (4), and in that a cutting point (16) located on a connecting line (V) between an axis of rotation (17) of the vacuum drum (3) and an axis of rotation (18) of the cutting roller (4) is located downstream of a contact point (23) of the material web (25) with the vacuum drum (3) in the conveying direction (9).

4. The device according to any of Claims 1 to 3, characterized in that conveying actuating means are provided such that the supports (2) are transported along the transport path (1) at a transport speed synchronized with the circumferential speed of the vacuum drum (3).

5. The device according to any of Claims 1 to 4, characterized in that a diameter (dv) of the vacuum drum (3) is at least double a diameter (ds) of the cutting roller (4).

6. The device according to any of Claims 1 to 5, characterized in that conveying actuating means are provided such that the vacuum drum (3) and the cutting roller (4) are operated at the same rotational speed.

7. The device according to any of Claims 1 to 6, characterized in that the transport path (1) extends in a straight line and tangentially towards the vacuum drum (3).

8. The device according to any of Claims 1 to 7, characterized in that the vacuum drum (3) includes an inset rubber strip (15) into which the blade (14) of the cutting roller (4) reaches in the cutting position (16) in order to make the cut in the material web (25).

9. The device according to any of Claims 1 to 8, characterized in that the supports (2) are each designed as a floor covering board, and the cutouts (Z1, Z2, Z3) are each designed as an impact-sound insulating film.

10. The device according to Claim 9, characterized in that the floor covering board is provided with an adhesive layer on a flat side facing the vacuum drum (3).

11. A method for applying cutouts (Z1, Z2, Z3) to supports (2) provided along a transport path (1), wherein a material web (25) is sequentially cut in order to produce the cutouts (Z1, Z2, Z3) and wherein the cutouts (Z1, Z2, Z3), while adhered to a vacuum drum (3), are transferred to the supports (2), the material web (25) first being supplied to the vacuum drum (3) to form a contact point (23) with the vacuum drum (3) and then to a cutting point (16) of the vacuum drum (3) and the cutting roller (4), which cutting point is located on a connecting line (V) between an axis of rotation (dv) of the vacuum drum (3) and an axis of rotation (dS) of the cutting roller (4) and at which a portion (22) of the material web (25) adhered to the vacuum drum (3) is cut to form a front edge (20) of the cutout (Z1, Z2, Z3), characterized in that, following the cut, the portion (22) of the material web (25) adhered to the vacuum drum (3) is subjected to a tensile force (Fz) in such a way that, by operating a linear actuator (12) that reduces the rotational speed of a metering roller (11), the cut front edge of the material web (25) is shifted by a slippage (s) counter to the rotational direction of the vacuum drum (3), said slippage corresponding to a distance (a) between two supports provided via the transport path (1) in synchronization with the vacuum drum (3), and in that the portion (22) of the material web (25) adhered to the vacuum drum (3) undergoes the next cut at the cutting point (16) to form a rear edge (19) of the same cutout (Z2), such that the cutouts (Z1, Z2, Z3) are each transferred to the supports (2).

12. The method according to Claim 11, characterized in that the tensile force (Fz) acting on the adhered portion (22) of the material web (25) occurs during frictional contact of the adhered portion (22) of the material web (25) between the vacuum drum (3) and the cutting roller (4).

13. The method according to Claim 11 or 12, characterized in that the duration of the tensile force (FZ) is dependent on the slippage (s) to be set for the cutouts (Z1, Z2, Z3) sequentially adhered to the vacuum drum (3).

14. The method according to any of Claims 11 to 13, characterized in that the tensile force (Fz) acting on the adhered portion (22) of the material web (25) acts for such a duration that the adhered portion (22) of the material web (25) is shifted counter to the conveying direction (9) by the slippage (s) relative to a cutout (Z2) adhered to the vacuum drum (3) on the downstream side.

15. The method according to any of Claims 11 to 14, characterized in that the cutting roller (4), at least upon contact of a blade (14) that protrudes on the circumference thereof, is operated at a rotational speed that matches that of the vacuum drum (3).