Equipment and methods for cutting woven sheet fabrics

Abstract

An apparatus and method for cutting a moving fabric (2) of a woven sheet are disclosed. The key components of the apparatus are: a pre-stretch roller assembly (9) and a post-stretch roller assembly (11); a transverse cutting device (7) mounted at an angle between the roller assemblies (9, 11) and having a movable blade assembly (38); a system of pneumatic cylinders (16, 17, 18 and 19) whose operation corresponds to a first tension roller assembly (13) and a second tension roller assembly (14) mounted on the pre-stretch assembly (9) and the post-stretch assembly (11), which help to firmly and under tension restrict the moving fabric; and a transverse cutting device (7) having a movable blade assembly (38) located between the rollers (9, 11) and having a set of pulleys (28, 29) that allow the blade assembly to move on a cutting platform (8), thereby cutting the continuous fabric (2) into fabric slices (15).

Description

Technical Field

[0001] This invention relates to apparatus for cutting sheet fabrics, and more particularly to apparatus for cutting moving fabrics in a cutting line. Background Technology

[0002] Numerous processing and conversion lines exist in which fabric cutting systems are already in use. Conventional blade devices in existing patents have proven highly successful in processing the types of sheets listed therein, namely cardboard, plastics, and similar materials that are relatively thick or offer resistance to conventional cutting blades. However, these systems are not satisfactory for fabrics made of materials with a high tendency to elongate under stress and / or a low coefficient of friction, such as woven and nonwoven plastic fiber webs or filament webs.

[0003] The problems arising when cutting such fabrics stem from the fundamental fact that, unlike guillotine blades that cut directly against the anvil, the tension in the fabric is a critical factor in the cutting action for any blade whose cutting motion depends on its passage through an insufficiently supported fabric. In other words, without the blade penetrating the fabric, the tension in the portion of the fabric opposite the blade must be sufficient to keep the fabric taut enough for the blade to pass through, rather than simply stretching the fabric. This problem is particularly acute for fabrics that have a high tendency to elongate under stress, such that they must be processed in the line and rewound at very low tension to prevent permanent elongation in the roll. A typical example of such fabrics is woven plastic with this high tendency to elongate. If such a fabric is attempted to be cut with, for example, the blade device of U.S. Patent No. 3,794,255, the required elongation will occur between the blade and the winding roller, resulting in excessive blade travel. Additionally, some fabric materials, depending on their coefficient of friction, will slip against the drive roller before sufficient tension can be generated to cut the fabric.

[0004] As an example again, U.S. Patent 3,611,856 ('856) discloses a fabric cutting machine for cutting fabric of material into fabric portions of predetermined sizes. The '856 invention further discloses a cutting machine system positioned perpendicular to the direction of the fabric. The '856 invention does not disclose any transverse cutting method or fabric cutting technique. Since transverse cutting methods are advantageous during high-speed cutting, the '856 invention cannot accurately cut the fabric when it is moving at high speeds.

[0005] Therefore, there is a need for a more efficient cutting system for continuously moving fabrics, especially woven plastic fabrics moving at higher speeds, and for a cutting system that overcomes the aforementioned drawbacks of conventional systems. Summary of the Invention

[0006] The main objective of this invention is to provide a cutting device or apparatus or system to facilitate precise cutting of continuously moving fabrics made of woven plastic.

[0007] Another object of the present invention is to provide a cutting device or system that allows for rapid cutting of continuously moving fabrics made of woven plastic with low maintenance costs.

[0008] Another object of the present invention is to provide a cutting device or system that offers flexibility in processing fabrics of different specifications without requiring too many changes to the device or system.

[0009] The fabric or textile cutting apparatus of the present invention includes a conveyor table for moving the workpiece and a movable blade, which is preferably guided along a track. The fabric cutting apparatus disclosed herein enables maximum workpiece productivity, and thus is advantageously used for separating workpieces from woven plastic fabrics. When the blade is in the track, it can be guided at a uniform speed, thereby reducing power consumption of the gear motor or drive, increasing its lifespan, and reducing maintenance.

[0010] The blade-shaped cutter is mounted on a conveyor such as a belt. The conveyor rotates in a direction that is almost transverse to the direction of movement of the unfolded fabric or textile.

[0011] The roll carrying the fabric to be cut into sheets is unwound from the unwinding unit. The fabric may be made of stretched plastic strip, which may optionally be coated, or made of plastic film, or a composite material of fabric and plastic film.

[0012] The unwound fabric travels on a conveyor or transfer device to the cutting platform. For example, the transfer device may be operated using driven rollers. A transverse conveyor in the form of a conveyor belt (not shown) is provided adjacent to the worktable, as well as clamping devices for the workpiece, such as jigs or magnets.

[0013] The apparatus disclosed herein separates a guided workpiece from a continuously arriving unfolded fabric. This apparatus is essentially a cutting device comprising at least one movable blade guided along a track aligned substantially transversely to the longitudinal conveying direction of an annular belt, to which at least one blade is fixed. The annular belt travels around two rollers, at least one of which is driven by a motor (preferably a servo motor) with a speed controller. The blade cuts through the width of the incoming workpiece by traveling at a controlled speed based on the rate of transverse movement of the incoming workpiece.

[0014] Cuts made using the apparatus disclosed herein are of high quality, producing smooth and precise cuts.

[0015] The transverse conveyor transports each workpiece away from the working area in the transverse conveying direction, which is orthogonal to the longitudinal conveying direction.

[0016] In subsequent processing steps, once the cutter has completely cut a single workpiece from the continuous workpieces, the cutter moves along its track to the top of the annular belt and thus disengages from the workpiece. The single workpiece is then conveyed out of the working area in the transverse transport direction by means of a transverse conveyor. Attached Figure Description

[0017] Figure 1 A perspective view showing the overall layout of the fabric cutting apparatus of the present invention is shown.

[0018] Figure 1A A moving fabric is shown, held between a pre-stretch roller assembly, a post-stretch roller assembly, a first tension roller assembly, and a second tension roller assembly.

[0019] Figure 2 A cross-sectional view of a transverse cutting device is shown, which moves a blade in a track that is transverse to the direction of fabric movement.

[0020] Figure 2A A cross-sectional view of the transverse cutting machine is shown.

[0021] Figure 3 A perspective view of a transverse cutting machine with a protective cover and maintenance facilities is shown.

[0022] Figure 4 A perspective view of the movable blade assembly is shown.

[0023] Figure 4A A perspective view showing the connection between the movable blade assembly and the transverse cutting machine equipment is shown.

[0024] Figure 5 A top view of the transverse cutting machine is shown.

[0025] Figure 5A A schematic diagram of a transverse cutting operation is shown.

[0026] Parts list:

[0027] 1. Fabric cutting equipment

[0028] 2. Fabric

[0029] 3. Base frame

[0030] 4. First side plate

[0031] 5. Second side panel

[0032] 6. First fabric guide roller

[0033] 6A. Second fabric guide roller

[0034] 6B. Third fabric guide roller

[0035] 7. Horizontal cutting machine equipment

[0036] 8. Cutting platform

[0037] 9. Pre-stretch roller assembly

[0038] 10. First Motor

[0039] 11. Rear stretching roller assembly

[0040] 12. Second motor

[0041] 13. First tension roller assembly

[0042] 14. Second tension roller assembly

[0043] 15. Fabric slices

[0044] 16. First pneumatic cylinder

[0045] 17. Second pneumatic cylinder

[0046] 18. Third pneumatic cylinder

[0047] 19. Fourth pneumatic cylinder

[0048] 20. First member

[0049] 21. Second member

[0050] 22. Third member

[0051] 23. Fourth member

[0052] 24. First holding block

[0053] 25. Second holding block

[0054] 26. Front panel

[0055] 27. Back panel

[0056] 28. First pulley

[0057] 29. Second pulley

[0058] 30. Third pulley

[0059] 31. Outer shell

[0060] 32. First axis of rotation

[0061] 33. Adjustable bracket

[0062] 34. Second rotation axis

[0063] 35. Fourth pulley

[0064] 36. First annular zone

[0065] 37. Second annular zone

[0066] 38. Movable blade assembly

[0067] 39. First guide rail

[0068] 40. Second guide rail

[0069] 41. Third guide rail

[0070] 42. Fourth guide rail

[0071] 43. Bottom cylindrical spacer

[0072] 44. Flat-top spacer

[0073] 45. Front Protective Cover

[0074] 46. ​​Rotating lid

[0075] 47. Third Motor

[0076] 48. Knife

[0077] 49. Knife Holder

[0078] 50. Knife retainer plate

[0079] 51. First Salesperson

[0080] 52. Second guide pin

[0081] 53. First side panel

[0082] 54. Second side plate

[0083] 55. With attachments

[0084] 56. Tool movement axis

[0085] 57. Fabric movement axis

[0086] 58. With wheel covers

[0087] 59. Location A

[0088] 60. Location B

[0089] 61. Position C

[0090] 62. Position D

[0091] 63. First opening

[0092] 64. Second opening

[0093] 65. First shot

[0094] 66. Second shot

[0095] 67. Fixture

[0096] 68. The first longitudinal edge of the fabric

[0097] 69. The second longitudinal edge of the fabric Detailed Implementation

[0098] Figure 1 The apparatus of the present invention is shown as a fabric or textile cutting device (1) that facilitates the precise cutting of a continuously moving fabric (2) made of woven fabric such as plastic. The device (1) includes a first side plate (4) and a second side plate (5) which are connected to and supported by a base structure (3) and a transverse cutting device (7) having a movable blade assembly (38). The base structure (3) is composed of a plurality of rectangular cross-section members joined or welded together to form a robust base.

[0099] In one embodiment, the side plates (4, 5) are constructed as thick plates and attached to the base frame structure (3) by any type of joining method such as welding, bolting or threading to form a rigid member.

[0100] The device (1) further includes a cutting platform (8), on which a continuously moving fabric (2) from an unwinding machine (not shown) is traction-driven by a driven roller (not shown). Figure 1 The fabric is conveyed to the cutting platform in the direction indicated by the dashed arrow, and the continuously moving fabric passes through a set of fabric guide rollers (6, 6A and 6B) to maintain proper tension and avoid wrinkling of the fabric (2).

[0101] The device (1) also includes a pre-stretch roller assembly (9) and a post-stretch roller assembly (11). Using a transverse cutting machine (7), the moving fabric (2) is cut on a cutting platform (8) between the pre-stretch roller assembly (9) and the post-stretch roller assembly (11), thereby converting the continuous fabric (2) into fabric slices (15). The pre-stretch roller assembly (9) and the post-stretch roller assembly (11) are constructed individually in such a way that they each have multiple rollers mounted on a single shaft.

[0102] like Figure 1AAs shown, the device (1) further includes a first tension roller assembly (13) and a second tension roller assembly (14), which hold the fabric (2) and press the fabric (2) from above onto the pre-stretch roller assembly (9) and the post-stretch roller assembly (11) over the entire transverse fabric length by means of pneumatic cylinders, such that the fabric (2) is positioned between the roller assemblies (9, 11, 13 and 14). The first pneumatic cylinder (16) and the second pneumatic cylinder (17) work together in a downward direction and push the first tension roller assembly (13) at both ends. The first pneumatic cylinder (16) and the second pneumatic cylinder (17) are connected to the first tension roller assembly (13) via a first rod (20) and a second rod (21), respectively. The connection can be obtained by any mechanical method using bolts, threads, or bushings or bearings, such that the downward movement of the first pneumatic cylinder (16) and the second pneumatic cylinder (17) facilitates the movement of the first tension roller assembly (13) to press the fabric (2) against the pre-stretch roller assembly (9).

[0103] Furthermore, the first tension roller assembly (13) and the second tension roller assembly (14) are responsible for maintaining sufficient tension in the fabric (2) and holding the fabric during cutting to enable a clean and precise cut. This fabric tension is generated by the speed difference between the pre-stretch roller assembly (9) and the rear stretch roller assembly (11). The speed of the rear stretch roller assembly (11) (in revolutions per minute) is slightly higher than that of the pre-stretch roller assembly (9), which is controlled by the first motor (10), and the speed of the rear stretch roller assembly (11) is controlled by the second motor (12). Such a difference in revolutions per minute is also required when pulling the fabric (2) in the direction of the fabric movement axis (57).

[0104] Similarly, the third pneumatic cylinder (18) and the fourth pneumatic cylinder (19) work together in the downward direction and push the second tension roller assembly (14) at both ends. The third pneumatic cylinder (18) and the fourth pneumatic cylinder (19) are connected to the second tension roller assembly (14) at their ends via the third rod (22) and the fourth rod (23), respectively. The connection can be achieved by any mechanical method using bolts, threads, or bushings or bearings, such that the downward movement of the third pneumatic cylinder (18) and the fourth pneumatic cylinder (19) facilitates the movement of the second tension roller assembly (14) to press the fabric (2) against the rear tension roller assembly (11).

[0105] from Figure 1AIt is evident that the pre-tension roller assembly (9) and the post-tension roller assembly (11) are identical in construction, having multiple rollers. These rollers can be selected from a set of rolling members such that when the fabric (2) is pulled in the direction of the fabric movement axis (57), the rollers provide negligible friction to the surface of the fabric (2), thereby preventing damage to the fabric (2). The first tension roller assembly (13) and the second tension roller assembly (14) also include multiple rollers respectively mounted on the first rod (65) and the second rod (66), thereby individually connecting the rods (65, 66) to at least two supports (67).

[0106] Figure 2 The internal structure of the transverse cutting machine (7) is shown, including a movable blade assembly (38) mounted on a first annular belt (36), and two parallel plates, a front plate (26) and a rear plate (27), which are mounted on... Figure 2A At the specified gap shown, the gap is maintained by a set of top flat spacers (44) and a set of bottom cylindrical spacers (43). The front plate (26) and the rear plate (27) can be made of metal or non-metal plates capable of bearing the loads of other supporting members. The transverse cutting machine equipment (7) is as follows Figure 5 The tilt angle α shown is located on the cutting platform (8), which is formed relative to the direction perpendicular to the blade movement axis (56), and the transverse cutting device (7) is mounted on the first side plate (4) and the second side plate (5) via the first retaining block (24) and the second retaining block (25). The mounting can be achieved by any mechanical means such as bolt connection, threaded connection or welding.

[0107] The transverse cutting machine further includes a rear plate (27), wherein a first pulley (28) is mounted at one end of the rear plate (27), and a second pulley (29) is mounted at the other end. The first pulley (28) is connected to a third pulley (30) via a first fixed housing (31) and a first rotating shaft (32), and at the other end, the second pulley (29) mounted on the rear plate (27) is connected to a third pulley (30). Figure 5 The adjustment bracket (33) shown is connected to the second rotating shaft (34).

[0108] Through such Figure 5 As shown, the movable adjustment bracket (33) allows the second pulley (29) to move further away from the first pulley (28). This movement is necessary to increase or decrease the tension in the first annular belt (36) passing through the pulleys (28, 29).

[0109] In addition, the third pulley (30) is made of Figure 3 The fourth pulley (35) shown is driven by the second annular belt (37). Therefore, rotation from... Figure 3The third motor (47) mounted on the first side plate (4) shown transmits power to the fourth pulley (35) and from the fourth pulley (35) to the third pulley (30), the fourth pulley and the third pulley are connected by the second annular belt (37), and then from the third pulley (30) to the first pulley (28), the third pulley and the first pulley are directly connected, and finally from the first pulley (28) to the second pulley (29), the first pulley and the second pulley are connected by the first annular belt (36).

[0110] In one embodiment, the pulleys can be selected from a set of circular grooved members with toothed or toothless profiles, such that the profiles can be of any shape or size capable of driving the belt to move with them. Furthermore, these pulleys are efficient enough to transmit motor power and drive the belt smoothly.

[0111] In another embodiment, the belt can be selected from a set of flexible members having the same tooth profile as the pulley and can withstand wear and tear.

[0112] The belt can be of any type, such as a flat belt, a V-belt, a round belt, a spring belt, a grooved belt, a timing belt, a special belt, or any kind known to those skilled in the art.

[0113] The movable blade assembly (38) is mounted on a first annular belt (36) that causes the movable blade assembly (38) to rotate in a peripheral track on the path of the first annular belt (36), which runs on a first pulley (28) and a second pulley (29) to smoothly cut the fabric into workpieces.

[0114] like Figure 4A As can be seen, the movable blade assembly (38) is further supported and guided by guide rails located at the top and bottom positions and between the first pulley (28) and the second pulley (29). The guide rails are mounted on the front plate (26) and the rear plate (27) with opposing guide rails facing each other. The first guide rail (39) and the second guide rail (40) are mounted on the front plate (26) at the top and bottom positions, while the third guide rail (41) and the fourth guide rail (42) are mounted on the rear plate (27), exactly opposite to the first guide rail (39) and the second guide rail (40), as shown. Figure 2A As shown.

[0115] In one embodiment, these guide rails (39, 40, 41 and 42) can be made of any shape, such as a U-shaped cross section or any other cross section such as a V-shape or a curve, allowing the movable blade assembly to move freely along the guide rails.

[0116] Figure 3A perspective view of a transverse cutting machine device (7) including a front protective cover (45) and a rotating cover (46) is shown. The front protective cover (45) covers the movement path of the blade (48) to prevent any accidents, and a pulley cover (58) is also provided to cover the rotating part to prevent any accidents. At the top of the transverse cutting machine device (7), a rotating cover (46) is provided for replacing the blade (48) when it wears out, thus eliminating the need to open the entire transverse cutting machine device (7) to replace the worn blade, which must be done periodically. In addition, the transverse cutting machine device (7) is driven by a third motor (47) connected to a fourth pulley (35) and connected to a third pulley (30) via an annular belt (37).

[0117] In one embodiment, the front protective cover (45) may be formed by bending a sheet or plate to create a rigid body that can withstand an external impact if one occurs during the cutting process.

[0118] In another embodiment, the rotating cover (46) may also be formed by bending a metal sheet or plate to create a rigid surface. Furthermore, the rotating cover (46) can be opened and closed whenever the blade (48) of the movable blade assembly (38) wears out and needs replacement. This replacement can be performed by driving the movable blade assembly (38) to position D (62), thereby opening the rotating cover (46). Position D (62) can be determined by a set of sensors (not shown) that control the stopping of the movable blade assembly (38).

[0119] Figure 4 A movable knife assembly (38) is shown, which includes a knife holder (49), on which the knife (48) is located and mounted via a knife holder plate (50), such that the knife (48) is positioned between the knife holder (49) and the knife holder plate (50). The knife (48) can be selected from a group of any sharp object capable of cutting the fabric (2) perfectly and smoothly without any obstruction.

[0120] The movable blade assembly (38) further includes a first guide pin (51) and a second guide pin (52), which are clamped between a first side plate (53) and a second side plate (54) in a rigid manner. The first side plate (53) and the second side plate (54) are mounted on a blade retainer (49) that creates a predetermined gap (not shown) between the two plates, allowing for smooth rotation of the guide pins. The first side plate (53) and the second side plate (54) are configured in an arcuate shape, enabling them to travel along the circular periphery of the first pulley (28) and the second pulley (29).

[0121] In addition, the movable blade assembly (38) also includes a first opening (63) and a second opening (64) for positioning the first annular belt (36), and the movement of the movable blade assembly (38) is driven by the first annular belt.

[0122] Figure 4A A perspective view of the movable blade assembly (38) is shown, in which a first guide pin (52) moves along the contours of a fourth guide rail (42) and a second guide rail (40). As previously described, the movable blade assembly (38) is connected to a first annular belt (36) such that the movable blade assembly (38) is driven by the first annular belt (36) along a path defined by the first annular belt (36).

[0123] Figure 5 and Figure 5A A top view of the transverse cutting machine (7) and a schematic diagram of the cutting operation are shown. Figure 5 and Figure 5A As shown, the transverse cutting machine (7) is installed at an angle α, which is formed relative to the direction of the fabric movement axis (57) perpendicular to the fabric (2).

[0124] The cutting speed of the transverse cutter is set such that the time required for the blade (48) to travel from position A (59) to position B (60) is the same as the time required for the fabric to move from position C (61) to position B (60).

[0125] The tilted mounting of the transverse cutting machine (7) provides the system with the flexibility to set the drive speed of the cutting blade (48) relative to the continuously moving fabric (2).

[0126] The present invention also provides a method for cutting a moving fabric (2). The method uses the apparatus (1) for cutting a moving fabric (2) disclosed on the foregoing page. The method for transverse cutting of a moving fabric (2) according to the present invention includes the following steps:

[0127] The fabric is pulled out of the unwinding machine drum by the traction roller (2).

[0128] The fabric (2) passes through the fabric guide rollers (6, 6A, 6B) to maintain proper tension and remove wrinkles from the fabric (2).

[0129] The fabric (2) is further pulled through the rear stretching roller assembly (11) and the pre-stretching roller assembly (9), wherein the tension roller assemblies (13, 14) provide proper holding during the cutting of the fabric (2).

[0130] The fabric (2) leaves the pre-stretch roller assembly (9) and as it reaches below the transverse cutting machine device (7) mounted at an angle relative to the fabric movement axis (57), the movable blade assembly (38) mounted on the first annular belt (36) between the first pulley (28) and the second pulley (29) cuts the fabric (2) while the rear stretch roller assembly (11) and the pre-stretch roller assembly (9) hold the fabric (2) during the cutting to provide appropriate tension and retention.

[0131] The movable blade assembly (38) moves and is guided by a first annular belt (36) and guide rails (39, 40, 41 and 42) so that it can move in the desired track.

[0132] The required fabric slices are conveyed for further processing as needed.

[0133] The method disclosed herein has further embodiments as described below.

[0134] In one embodiment, the rotational speed of the rear stretching roller assembly (11) is slightly higher than that of the pre-stretching roller assembly (9), wherein the rotational speed of the pre-stretching roller assembly (9) is controlled by a first motor (10), and the rotational speed of the rear stretching roller assembly (11) is controlled by a second motor (12).

[0135] In another embodiment, the cutting speed of the transverse cutter (7) is set such that the time required for the blade (48) to travel from position A (59) on the first longitudinal edge (68) of the fabric (2) to position B (60) on the second longitudinal edge (69) of the fabric (2) is the same as the time required for the fabric (2) to travel the distance between position A and position B (60) on the second longitudinal edge (69).

[0136] While the above description includes many features, these features should not be construed as limiting the scope of the invention, but rather as examples of preferred embodiments. It must be recognized that modifications and variations are possible based on the disclosure given above without departing from the spirit and scope of the invention. Therefore, the scope of the invention should not be determined by the illustrated embodiments, but rather by the invention as a whole, and by the appended claims and their legal equivalents.

Claims

1. An apparatus for cutting woven sheet fabric (2), characterized in that, The device includes: A first side plate (4) and a second side plate (5), the first side plate and the second side plate are connected to the base frame structure (3) and supported by the base frame structure; Cutting platform (8), on which the continuously moving fabric (2) from the unwinding machine is conveyed and the continuously moving fabric passes through a set of fabric guide rollers (6, 6A and 6B) to maintain proper tension and thus avoid wrinkling of the fabric (2); The pre-stretch roll assembly (9) and the post-stretch roll assembly (11) are each individually constructed to have multiple rolls mounted on a single shaft; A transverse cutting machine (7) has a movable blade assembly (38) mounted at an angle between the pre-stretch roller assembly (9) and the rear-stretch roller assembly (11). The first tension roller assembly (13) and the second tension roller assembly (14) are installed corresponding to the pre-tension roller assembly (9) and the post-tension roller assembly (11), respectively. A pair of pneumatic cylinders, namely a first pneumatic cylinder (16) and a second pneumatic cylinder (17) connected to the first tension roller assembly (13) by a first rod (20) and a second rod (21) respectively, and another pair of pneumatic cylinders, namely a third pneumatic cylinder (18) and a fourth pneumatic cylinder (19) corresponding to the second tension roller assembly (14), the third pneumatic cylinder and the fourth pneumatic cylinder being connected to the second tension roller assembly (14) by a third rod (22) and a fourth rod (23) respectively. The transverse cutting machine (7) is capable of using the movable blade assembly (38) to cut the fabric (2) on the cutting platform (8) between the pre-stretch roller assembly (9) and the rear stretch roller assembly (11), thereby cutting the fabric (2) into fabric slices (15).

2. The device according to claim 1, wherein the connection of the first rod (20) and the second rod (21) to the first tension roller assembly (13) and the connection of the third rod (22) and the fourth rod (23) to the second tension roller assembly (14) can be of the type selected from bolted connection, threaded connection and bushing or bearing device, thereby the downward movement of the corresponding pneumatic cylinders (16, 17 and 18, 19) promotes the movement of the first tension roller assembly (13) to press the fabric (2) against the pre-stretch roller assembly (9) and promotes the movement of the second tension roller assembly (14) to press the fabric (2) against the rear stretch roller assembly (11).

3. The device according to claim 1 or 2, wherein the rotational speed of the rear stretching roller assembly (11) is slightly higher than the rotational speed of the pre-stretching roller assembly (9), wherein the rotational speed of the pre-stretching roller assembly (9) is controlled by a first motor (10), and the rotational speed of the rear stretching roller assembly (11) is controlled by a second motor (12).

4. The apparatus according to claim 1 or 2, wherein the pre-stretching roller assembly (9) and the post-stretching roller assembly (11) are identical in construction and have a plurality of rollers, and wherein, The first tension roller assembly (13) and the second tension roller assembly (14) have the same construction and are each made of multiple rollers respectively mounted on a set of first rods (65) and second rods (66), the first rods (65) being connected to each other by a set of supports (67).

5. The apparatus according to claim 1 or 2, wherein the transverse cutting machine apparatus (7) comprises: Two parallel plates, namely a front plate (26) and a rear plate (27) mounted with a predetermined gap, said predetermined gap being maintained by a set of top flat spacers (44) and a set of bottom cylindrical spacers (43), A first pulley (28) and a second pulley (29) are mounted at one end of the rear plate (27) and connected to a third pulley (30) via a first fixed housing (31) and a first rotating shaft (32). The second pulley is mounted at the other end of the rear plate (27) and connected to an adjusting bracket (33) and a second rotating shaft (34). The first annular belt (36) passes through the first pulley (28) and the second pulley (29); The movable blade assembly (38) is connected to the first annular belt (36); The fourth pulley (35) drives the third pulley (30) using the second annular belt (37); The third motor (47), mounted on the first side plate (4), transmits rotation to the fourth pulley (35), and finally to the second pulley (29) via the third pulley (30) and the first pulley (28). The first pulley, the second pulley (29), the third pulley and the fourth pulley are connected by the first annular belt (36) and the second annular belt (37). The first guide rail (39), the second guide rail (40), the third guide rail (41), and the fourth guide rail (42) are mounted on the front plate (26) at the top and bottom positions of the front plate, respectively. The third guide rail and the fourth guide rail are mounted on the rear plate (27) completely opposite to the first guide rail (39) and the second guide rail (40), respectively. A front protective cover (45) and a pulley cover (58), the front protective cover having a rotating element and covering the blade (48), and the pulley cover for covering the first pulley (28) and the second pulley (29). The transverse cutting machine is mechanically mounted on the first side plate (4) and the second side plate (5) via the first retaining block (24) and the second retaining block (25).

6. The device according to claim 5, wherein the mechanical method is a bolted connection.

7. The device according to claim 5, wherein the mechanical means is a threaded connection.

8. The device according to claim 5, wherein the mechanical method is welding.

9. The device according to claim 5, wherein the first pulley, the second pulley, the third pulley and the fourth pulley can be circular grooved pulleys with toothed or toothless profiles, the toothed or toothless profiles accommodating the corresponding belts of the first annular belt (36) and the second annular belt (37).

10. The device according to claim 5, wherein the first annular belt (36) and the second annular belt (37) are flexible members having toothed profiles that match the profiles of the corresponding pulleys, and the first annular belt (36) and the second annular belt (37) are selected from any one of flat belts, V-belts, round belts, spring belts, multi-groove belts and timing belts.

11. The device according to claim 5, wherein the movable blade assembly (38) rotates in a peripheral track on the path of the first annular belt (36), the first annular belt running on the first pulley (28) and the second pulley (29).

12. The device according to claim 5, wherein the first guide rail (39), the second guide rail (40), the third guide rail (41) and the fourth guide rail (42) have a U-shaped, V-shaped or curved cross-section, such that the movable blade assembly (38) can move freely through the first guide rail (39), the second guide rail (40), the third guide rail (41) and the fourth guide rail (42).

13. The device according to claim 5, wherein the front protective cover (45) and the rotating cover (46) are made by bending a metal sheet or plate to form a corresponding rigid body.

14. The device of claim 5, wherein the movable blade assembly (38) comprises: The blade (48) is mounted on the blade retaining bracket (49) via the blade retaining plate (50) to position the blade (48) between the blade retaining bracket (49) and the blade retaining plate (50); A first guide pin (51) and a second guide pin (52) are clamped between a first side plate (53) and a second side plate (54) to form a rigid body, wherein the first side plate (53) and the second side plate (54) are mounted on the knife retainer (49), and the knife retainer creates a desired gap between the first side plate (53) and the second side plate (54) so ​​that the rotation of the first guide pin (51) and the second guide pin (52) occurs smoothly; A first opening (63) and a second opening (64), a first annular belt (36) passing through the first opening and the second opening for positioning, such that the movement of the movable blade assembly (38) is driven by the first annular belt (36).

15. The device according to claim 14, wherein the first side plate (53) and the second side plate (54) are configured in an arcuate shape such that they can travel on the circular periphery of the first pulley (28) and the second pulley (29).

16. The apparatus of claim 14, wherein the cutting speed of the transverse cutting apparatus (7) is set such that the time required for the blade (48) to travel from position A (59) on the first longitudinal edge (68) of the fabric (2) to position B (60) on the second longitudinal edge (69) of the fabric (2) is the same as the time required for the fabric (2) to travel the distance between the position corresponding to position A and position B (60) on the second longitudinal edge (69).

17. A method for cutting a woven sheet fabric (2) using the equipment according to any one of claims 1 to 16, characterized in that, The method includes the following steps: a. Pass the fabric (2) through the fabric guide rollers (6, 6A and 6B) to maintain proper tension and remove wrinkles from the fabric (2); b. Pull the fabric (2) through the rear stretching roller assembly (11), the pre-stretching roller assembly (9), the first tension roller assembly (13) and the second tension roller assembly (14), and constrain the fabric on the cutting platform (8) in preparation for cutting; c. Disengage the fabric (2) from the pre-stretch roller assembly (9); d. When the fabric (2) reaches below the transverse cutting machine (7) mounted at an angle relative to the fabric movement axis (57), the fabric (2) is cut using the movable blade assembly (38) having a blade (48) held within the transverse cutting machine (7), while the fabric (2) remains firmly restrained by the rear stretch roller assembly (11) and the pre-stretch roller assembly (9) to provide appropriate tension and holding. e. Transfer the slices of the fabric (2) to the downstream station for further processing as needed.

18. The method according to claim 17, wherein the rotational speed of the rear stretching roller assembly (11) is slightly higher than the rotational speed of the pre-stretching roller assembly (9), wherein the rotational speed of the pre-stretching roller assembly (9) is controlled by a first motor (10), and the rotational speed of the rear stretching roller assembly (11) is controlled by a second motor (12).

19. The method according to claim 17 or 18, wherein the cutting speed of the transverse cutting device (7) is set such that the time required for the blade (48) to travel from position A (59) on the first longitudinal edge (68) of the fabric (2) to position B (60) on the second longitudinal edge (69) of the fabric (2) is the same as the time required for the fabric (2) to travel the distance between the position corresponding to position A and position B (60) on the second longitudinal edge (69).

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