SYSTEM FOR EXTRACTING CUT LAMINAR MATERIALS FOR CUTTING MACHINES OF FLEXIBLE LAMINAR MATERIALS

Abstract

The system comprises a cutting table (1), said cutting table (1) being formed by a cutting surface (1A), which is formed by brush blocks (3), the brush blocks (3) comprising bristles, and combs (4) equipped with protrusions (5, 6) and installed on one edge of said cutting table (1), defining a proximal end that is closer to the edge of the cutting table (1) and a distal end further from the edge of the cutting table (1), the distal end of the protrusions (5, 6) of each comb (4) being inserted between the bristles of the brush blocks (3), in which the comb (4) comprises first protrusions (5) and second protrusions (6), the distal end of the first protrusions (5) being further from the edge of the table (1) than the distal end of the second protrusions (6).

Claims

1. A system for extracting cut laminar materials for cutting machines of laminar materials, which comprises: a cutting table (1) on which a laminar material (2) to be cut is placed, said cutting table (1) being formed by a cutting surface (1A), which is formed by a plurality of brush blocks (3), the brush blocks (3) comprising a plurality of bristles, said cutting surface (1A) moving as the laminar material is cut; and modular combs (4) for extracting the cut laminar material equipped with a plurality of protrusions (5, 6) and installed on one of the edges of said cutting table (1), defining a proximal end that is closer to the edge of the cutting table (1) and a distal end further from the edge of the cutting table (1), the distal end of the protrusions (5, 6) of each comb (4) being inserted between the bristles of the brush blocks (3); characterised in that the extraction comb (4) comprises first protrusions (5) and second protrusions (6), the distal end of the first protrusions (5) being further from the edge of the cutting table (1) than the distal end of the second protrusions (6).

2. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 1, wherein the comb (4) comprises a longitudinal articulation (9).

3. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 2, wherein said longitudinal articulation (9) has an adjustable opening force.

4. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 1, wherein the first and second protrusions (5, 6) comprise a weakened area (10) that is narrower than the rest of the protrusion (5, 6) at its proximal end.

5. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 2, wherein the comb (4) comprises a sensor (11) that detects the state of said weakened area (10) and/or said longitudinal articulation (9).

6. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 4, wherein the comb (4) comprises a sensor (11) that detects the state of said weakened area (10) and/or said longitudinal articulation (9).

7. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 1, wherein the first protrusions (5) are longer than the second protrusions (6).

8. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 1, wherein the first protrusions (5) are less inclined with respect to the edge of the cutting table (1) than the second protrusions (6).

9. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 6, wherein the first protrusions (5) are less inclined with respect to the edge of the cutting table (1) than the second protrusions (6).

10. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 1, wherein the comb (4) comprises an area made of flexible material (7) between the protrusions (5, 6) of the comb (4).

11. The system for extracting cut laminar materials for cutting machines of laminar materials according to claim 4, wherein said area made of flexible material (7) is made of elastomer plastic.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0033] To provide a better understanding of the description, a series of drawings are included that schematically, and solely as an example and not for the purposes of limitation, represent a practical embodiment of the invention.

[0034] FIG. 1 is a perspective view of one part of the cutting machine of laminar materials according to the present invention;

[0035] FIG. 2 is a perspective view of the details of the comb area of the cutting machine of laminar materials according to the present invention; and

[0036] FIGS. 3 and 4 are cross-sectional elevation views of the comb area of the cutting machine of laminar materials according to different embodiments of the present invention.

DESCRIPTION OF A PREFERRED EMBODIMENT

[0037] The cutting machine according to the present invention comprises a cutting table 1, which includes a cutting surface 1A, on which the laminar material 2 to be cut is placed, said laminar material being, for example, multi-layered fabric.

[0038] Said cutting surface 1A is formed by a plurality of brush blocks 3, the brush blocks 3 comprising a plurality of bristles, and said cutting surface 1A moving as the laminar material 2 is cut, to extract the cut laminar material 2.

[0039] To do this, the cutting machine also comprises an extraction comb 4 that is equipped with a plurality of first and second protrusions 5, 6. This comb 4 may be continuous or be formed by modules, as desired.

[0040] This extraction comb 4 is installed or secured on one of the edges of said cutting table 1, defining a proximal end that is closer to the edge of the cutting table 1 and a distal end further from the edge of the cutting table 1, the distal end of the protrusions 5, 6 of each comb 4 being inserted between the bristles of the brush blocks 3.

[0041] According to the present invention, the distal end of the first protrusions 5 is further from the edge of the cutting table 1 than the distal end of the second protrusions 6, as shown in FIGS. 1 and 2.

[0042] This arrangement of the protrusions is achieved by making the first protrusions 5 longer than the second protrusions 6 and/or by making the first protrusions 5 less inclined with respect to the edge of the cutting table 1 than the second protrusions 6.

[0043] The protrusions 5, 6 are preferably made of high-performance plastic due to cost, but they may also be made of metal materials, compounds or other materials.

[0044] The first protrusions 5 define a main separation area, which is where most of the laminar material 2 is separated from the cutting surface 1A formed by brush blocks 3.

[0045] Moreover, the second protrusions 6 define an internal expulsion area, which frequently redirect or prevent the ends of the fabric or scraps from entering easily between the fingers of the main separation area when the lower surface of the laminar material 2, often due to the vacuum of the cutting table a, cannot be separated from the cutting surface 1A.

[0046] Optionally, several areas made of flexible material 7 (for example, made of thermoplastic elastomer) are formed, preferably injected on top, between the protrusions 5, 6, on the lower part of the comb 4.

[0047] This design of the protrusions 5, 6 is even more useful in machines that cut and advance simultaneously, since the depression of the cutting table 1 is higher, even when it advances, because otherwise the material could not be cut with good quality since it must necessarily be compressed by the vacuum of the cutting table 1, in such a way that it is fixed at the time of cutting.

[0048] It is important to note that the length and/or inclination of the protrusions 5, 6 may be varied in the different areas of the table, which is especially useful at the ends where there are often more jams due to the scraps.

[0049] In these areas, the fact that the brushes deteriorate sooner is less critical, because there are spaces for the alignment of the cut material, ends where brush changes are required with a different frequency than in the inner areas.

[0050] In addition, this support to prevent jamming could help to reduce malfunctions that are costly, as well as reduce the lost operating time of the machine due to preventable repairs.

[0051] In addition, the protrusions 5, 6 of the comb 4 are mounted on a support 8, which comprises, behind the area where the protrusions 5, 6 are arranged, a longitudinal articulation 9 or weakened break area 10, which acts as a mechanical fuse.

[0052] The articulation 9 enables the rotation and opening of the area of the protrusions 5, 6 when the material has entered between the protrusions 5, 6 in the main separation area and in the internal expulsion area, and the cutting surface.

[0053] This opening prevents breakage and allows the same piece to be reinstalled without the need for a maintenance operator. In the case of the weakened area 10, the piece must be changed, but the cost per unit is lower than the cost generated by a malfunction of the cutting machine.

[0054] The articulation 9 and the weakened area 10 allow the holding force, and therefore the opening or breaking force, to be adjusted. In the case of the articulation 9, this force can be adapted to the different materials 2 that are cut. In the case of the weakened area 10, this force can be adapted to the different materials 2 that are cut with different interchangeable combs.

[0055] In order for it to be useful, a sensor 11 is included that stops the machine and sounds an alarm when it detects that the comb 4 opens or breaks, so that the operator can remove the material and reposition or replace the comb 4, the operation continuing without excessive down time or causing any malfunction. Often, the material 2 can be reused because jamming has not occurred or it has not degraded as currently occurs. Said sensor 11 may be a single sensor, detecting the entire length of the comb 4, individual for each comb module, or individually located for each protrusion 5, 6.

[0056] Although reference has been made to a specific embodiment of the invention, it is clear to a person skilled in the art that numerous variations and modifications may be made to the cutting machine described, and that all of the details mentioned may be replaced by other technically equivalent details, without diverging from the scope of protection defined by the attached claims.