Sawtooth cross-cut type cloth breaking process

Abstract

The application discloses a sawtooth transverse cutting type cloth breaking process, comprising the following steps: S1, position adjustment; S2, blowing and breaking cloth. One aspect of the application is based on side-by-side, alignment, staggered layout to form a sawtooth with the tooth tip located on the same straight line, and the cloth is broken through synchronously, and the cloth width is not limited, the cut is neat and high in quality, and the waste head is less. Another aspect is based on the cooperation of two air flows, the cloth is first blown and pressed to the roll changing shaft, then at the moment of breaking the cloth, the air flow blows and provides the cloth falling power to cooperate with the roll changing shaft rotating to break the cloth and change the roll, that is, the transmission action between the cloth breaking and the roll changing is cooperated.

Description

[0001] This application is a divisional application of the sawtooth cross-cutting fabric cutting mechanism of an automatic roll changing system, filed on July 16, 2024, with application number 2024109485073. Technical Field

[0002] This invention belongs to the field of textile processing equipment, and specifically relates to a sawtooth cross-cutting process for textile fabrics. Background Technology

[0003] Currently, in order to produce nonwoven fabrics of different widths, it is necessary to use a slitting machine to cut the nonwoven fabric. Companies usually unwind and slit the nonwoven fabric master roll to be slit in sequence, then roll the slit nonwoven fabric onto the mandrel, then cut the fabric and change the roll, and finally pull the mandrel.

[0004] However, during the fabric cutting process, the two opposite sides of the nonwoven fabric at the cut point need to be kept relatively flat before being cut with a laterally moving cutter. Therefore, the following defects exist in the entire process: 1. This type of fabric cutting mode requires the fabric to stop being transported and cannot be carried out during continuous fabric transport operations. Therefore, it cannot meet the fabric cutting requirements for continuous automatic winding and roll changing. 2. There is no connection between the fabric breakage and the automatic winding and shaft changing, which makes the fabric breakage completely independent of other equipment and cannot make full use of the nonwoven fabric movement trend formed by the rotation to assist the automatic winding. 3. The flatness and alignment of the cuts formed by different fabric cutting methods are not the same, resulting in more waste material; moreover, as the width of the fabric increases, its tension is more difficult to control, making it difficult to meet the requirements for the straightness of the cut, that is, it is impossible to cut the fabric according to the required path. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a novel sawtooth cross-cutting process for textile fabrics.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A sawtooth cross-cutting process for cutting textile fabric includes the following steps: S1, Position Adjustment The sawtooth cross-cutting fabric cutting mechanism is adjusted to the roll changing station and located above the roll changing shaft. After the fabric passes through the roll changing shaft to the right and upward to adhere to the sawtooth cross-cutting fabric cutting mechanism, it is transferred to the left-side winding station. The sawtooth cross-cutting fabric cutting mechanism forms a first flow equalization hole and a second flow equalization hole that are evenly spaced along its own length direction. The airflow blown out from the first flow equalization hole and the second flow equalization hole are defined as the first airflow and the second airflow, respectively. S2, Blowing away the broken cloth The first airflow is perpendicular to the cloth and tilts upward to the right, and the cloth blocks the first flow equalization hole. The second airflow blows downward and to the right, and the cloth is relatively attached to the left and top of the rewinding shaft. The cloth cutting tool of the sawtooth transverse cutting cloth cutting mechanism moves synchronously with the cloth from bottom to top and gradually penetrates the cloth to form a cloth cut by the saw teeth with relatively misaligned and attached teeth. The cut rear end of the cloth is blown by the first airflow and unfolds and attaches to the right side of the rotating rewinding shaft. The cloth cutting tool includes a first sawtooth blade and a second sawtooth blade that are relatively flush and attached. The teeth of the first sawtooth blade and the second sawtooth blade are relatively misaligned and attached.

[0007] Preferably, the directions of the first airflow and the second airflow are perpendicular to each other. This ensures that the resulting airflow can optimally assist in purging the broken fabric.

[0008] According to a specific embodiment and preferred aspect of the present invention, the cross-sectional area of ​​each first flow equalization hole is larger than the cross-sectional area of ​​each second flow equalization hole. Generally, the cross-sectional area of ​​the first flow equalization hole is more than 10 times that of the second flow equalization hole. To further explain, it is precisely because of this size that when the fabric is intact, the pressure bonding is mainly achieved by the second flow equalization holes. Once the fabric is broken, it can provide instantaneous punching and, combined with the downward trend, make the broken fabric fall more evenly into and bond with the lower reel, thus achieving optimal winding (note that this is optimal, not necessarily).

[0009] Preferably, each first flow equalization hole corresponds to multiple second flow equalization holes. Generally, each first flow equalization hole corresponds to 4, 6, or 8 second flow equalization holes. Further, there are at least two rows of second flow equalization holes, with multiple rows spaced apart. This airflow allows the cut fabric to be more smoothly and evenly adhered to the rewinding shaft, facilitating the rewinding process.

[0010] According to another specific embodiment and preferred aspect of the present invention, the sawtooth transverse cutting fabric cutting mechanism includes fixed seats that rotate around the center of a transmission roller and are installed at both ends of the transmission roller, a bellows located between the two fixed seats and forming an air cavity inside, a flow equalization hood installed at the air outlet of the bellows, a plurality of arc support seats installed side by side on the bellows, a fabric cutting flipping shaft with the center of the arc as the rotation center and fitted to the plurality of arc support seats, fabric cutting cutters installed on the fabric cutting flipping shaft and having sawtooths arranged side by side and aligned, a fabric cutting power unit capable of driving the fabric cutting flipping shaft to flip, and a fabric support frame rod, wherein the flow equalization hood extends along the length direction of the bellows and forms a first flow equalization hole corresponding to the air outlet pipe on the side facing the air outlet pipe, and the second flow equalization hole is perpendicular to the first flow equalization hole and located at the bottom of the flow equalization hood. When cutting the fabric, the fabric fits against the fabric support frame rod and the flow equalization hood. Here, the tension formed by the fabric support rod and the flow equalization hood flattens the fabric as it passes through, and then the fabric cutting knife cuts through the fabric while it is flattened.

[0011] Preferably, the bellows has an inlet pipe and an outlet pipe, wherein there are multiple outlet pipes arranged side-by-side at intervals along the length of the bellows; this ensures that the fabric is relatively evenly stressed in the width direction. The extension direction of the inlet pipe is parallel to the extension direction of the second flow equalization hole, and the multiple inlet pipes are arranged perpendicular to the outlet pipes, thus avoiding uneven airflow from the air entering the air chamber.

[0012] In some specific embodiments, the cross-sections of the bellows, flow equalization hood, and fabric support rod are all U-shaped. The bellows and flow equalization hood are aligned and arranged side by side, and the arc-shaped support base and fabric support rod are fixed to the bellows and flow equalization hood respectively. The fixed base is equipped with a sealing plate that closes the ends of the U-shaped bellows, flow equalization hood, and fabric support rod. Assembly can be achieved using U-shaped profiles, and the alignment and side-by-side arrangement of the bellows and flow equalization hood not only facilitates the installation of the arc-shaped support base and fabric support rod, but also provides sufficient air volume for purging, bonding, covering, and rewinding.

[0013] Preferably, the arc support includes a seat body fixed to the bellows, wherein an arc-shaped groove with an outward opening is formed on the seat body, and the fabric flipping shaft is installed in a plurality of aligned arc-shaped grooves.

[0014] Preferably, the fabric cutting power unit includes fabric cutting power units located at both ends of the fabric cutting and flipping shaft and moving synchronously. Each fabric cutting power unit includes an end plate fixed to the end of the fabric cutting and flipping shaft, a mounting base fixed to the air box, and a telescopic rod rotatably mounted at both ends between the end plate and the mounting base, wherein the telescopic rod extends and retracts to drive the mounting base and the fabric cutting and flipping shaft to rotate synchronously. Specifically, the telescopic rod is pneumatically powered, with one part of the air passage connected to the telescopic rod and the other part connected to the air box.

[0015] Furthermore, the fabric cutting blade can be concealed between the fabric cutting and turning shaft and the fabric support rod. That is, when not cutting fabric, the blade is concealed and protected to prevent damage. The fabric cutting blade consists of multiple serrations arranged side-by-side at intervals, with the tips of the serrations relatively spaced apart and aligned on the same straight line. Under the action of these serrations, fabric cutting can be performed instantaneously, improving the neatness and accuracy of the cutting process.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: Existing fabric cutting methods require flattening the two sides of the nonwoven fabric at the cut point before using a laterally moving cutter. This method necessitates stopping the fabric transport and cannot be performed during continuous fabric transport, thus failing to meet the requirements for continuous automatic winding and rewinding. Furthermore, fabric cutting is completely independent of automatic winding and rewinding, making it impossible to fully utilize the movement of the nonwoven fabric to assist in automatic rewinding. Additionally, different cutting methods result in inconsistent flatness and alignment of the cuts, leading to more waste. Moreover, as the fabric width increases, tension becomes more difficult to control, making it difficult to achieve the required straightness of the cut, meaning it cannot cut the fabric along the desired path. This invention cleverly solves these shortcomings of existing structures through a comprehensive design of the fabric cutting process. After adopting this fabric cutting process, during fabric cutting, the sawtooth transverse cutting mechanism is adjusted to the roll-changing station and located above the roll-changing shaft. The fabric passes through the roll-changing shaft to the right and upwards, adhering to the flow equalization hood, and is then transported to the left-side winding station. The first airflow is perpendicular to the fabric and tilts upwards to the right, and the fabric blocks the first flow equalization hole. The second airflow blows downwards and to the right, causing the fabric to adhere relatively to the left and top sides of the roll-changing shaft. Then, the fabric cutting cutter moves synchronously with the fabric from bottom to top, gradually penetrating the fabric with the sawtooth to form a cut. The cut rear end of the fabric is instantly blown by the first airflow and unfolds to adhere to and wrap around the rotating roll-changing shaft. On the right side, the fabric is changed, and the front end of the fabric is cut and wound up at the winding station. Therefore, this invention, on the one hand, is based on the side-by-side, aligned and staggered layout to form saw teeth with the tips on the same straight line to penetrate and cut the fabric in the synchronous movement with the fabric, and is not limited by the width of the fabric. The cut is neat and of high quality, with less waste. On the other hand, based on the cooperation of two airflows, the fabric is first blown and pressed against the changing shaft, and then at the moment of fabric cutting, the airflow sweeps and provides the power to drop the fabric to cooperate with the rotating changing shaft to cut and change the fabric. That is, the transmission action is carried out in cooperation between cutting the fabric and changing the roll. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the automatic roll changing system of the present invention; Figure 2 for Figure 1 A front view diagram (during a roll change); Figure 3 for Figure 1 Schematic diagram of the transverse cutting fabric cutting mechanism with central saw teeth; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 3 A partial structural diagram (partial details omitted); Figure 6 for Figure 3 A diagram showing the view from the right. Figure 7 for Figure 6 Schematic diagram of the sectional view along the central AA direction; Wherein: G, transfer roller; S, winding station; H, roll changing station; M, roll changing shaft; D, sawtooth cross-cutting fabric cutting mechanism; 1, fixed seat; 10, sealing plate; 2, air box; 20, air inlet pipe; 21, air outlet pipe; 3, flow equalization hood; 31, first flow equalization hole; 32, second flow equalization hole; 4, arc support seat; 40, seat body; 5, fabric cutting flipping shaft; 6, fabric cutting knife; 60, saw teeth; 61, first sawtooth blade; 62, second sawtooth blade; 7, fabric cutting power unit; 700, end plate; 701, mounting seat; 702, telescopic rod; 8, fabric support frame rod. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0023] like Figure 1 and Figure 2 As shown, the automatic roll changing system of this embodiment includes a winding station S and a roll changing station H located on the left and right sides of the transmission roller G. The sawtooth cross-cutting fabric cutting mechanism D rotates 360° around the axis of the transmission roller G to adjust to stop or avoid at the roll changing station H and the winding station S.

[0024] Combination Figures 3 to 7 As shown, the sawtooth transverse cutting fabric cutting mechanism D includes a fixed seat 1 that rotates around the center of the transmission roller G and is installed at both ends of the transmission roller G; a wind box 2 located between the two fixed seats 1 and forming an air cavity inside; a flow equalization hood 3 installed at the air outlet of the wind box 2; multiple arc support seats 4 installed side by side on the wind box 2; a fabric cutting flipping shaft 5 with the center of the arc as the rotation center and fitted to the multiple arc support seats 4; fabric cutting cutters 6 installed on the fabric cutting flipping shaft 5 and arranged side by side and aligned to form sawtooth 60; a fabric cutting power unit 7 that can drive the fabric cutting flipping shaft 5 to flip; and a fabric support frame rod 8.

[0025] In some specific embodiments, the cross-sections of the bellows 2, the flow equalization hood 3, and the fabric support rod 8 are all U-shaped. The bellows 2 and the flow equalization hood 3 are aligned and arranged side by side. The arc support base 4 and the fabric support rod 8 are respectively fixed on the bellows 2 and the flow equalization hood 3. The fixing base 1 is provided with a sealing plate 10 that closes the ends of the U-shaped bellows 2, the flow equalization hood 3, and the fabric support rod 8. Therefore, U-shaped profiles can be used for assembly. At the same time, the bellows 2 and the flow equalization hood 3 are aligned and arranged side by side, which not only facilitates the installation of the arc support base 4 and the fabric support rod 8, but also the air volume generated meets the needs of blowing, bonding, covering and changing the roll.

[0026] In this example, the bellows 2 has an inlet pipe 20 and an outlet pipe 21. There are multiple outlet pipes 21, arranged side-by-side at intervals along the length of the bellows 2. There are multiple inlet pipes 20, arranged perpendicularly to the outlet pipes 21 (in this example, there are two inlet pipes 20, located at both ends of the bellows 23). This ensures that the fabric is relatively evenly stressed in the width direction. The flow equalization hood 3 has first flow equalization holes 31 and second flow equalization holes 32 evenly spaced along its length. The airflow from the first and second flow equalization holes 31 is perpendicular to each other and defined as the first airflow and the second airflow, respectively. The flow equalization hood 3 extends along the length of the bellows 2, and on the side opposite the outlet pipe 21, it forms a first flow equalization hole 31 corresponding to each outlet pipe 21. The second flow equalization hole 32 is perpendicular to the first flow equalization hole 31 and located at the bottom of the flow equalization hood 3. The extending direction of the inlet pipe 20 is parallel to the extending direction of the second flow equalization hole 32. This prevents uneven airflow from entering the air chamber. Furthermore, the second flow equalization holes 32 have at least two rows, with multiple rows of second flow equalization holes 32 spaced apart. This creates an airflow that allows the cut fabric to be more smoothly and evenly adhered to the rewinding shaft for easy rewinding. The fabric support rod 8 extends along the length of the flow equalization hood 3 by being formed at the top of the flow equalization hood 3. During fabric cutting, the fabric adheres to the fabric support rod 8 and the flow equalization hood 3. Here, the tension created by the fabric support rod and the flow equalization hood flattens the passing fabric, and then the fabric cutting tool cuts through the fabric while it is flattened. The arc-shaped support base 4 includes a base body 40 fixed to the air box 2, wherein an outward-facing arc-shaped groove is formed on the base body 40, and the fabric cutting flipping shaft 5 is installed in multiple aligned arc-shaped grooves.

[0027] In this example, the cross-sectional area of ​​each first equalizing hole 31 is larger than the cross-sectional area of ​​each second equalizing hole 32. Generally, the cross-sectional area of ​​the first equalizing hole 31 is more than 10 times the cross-sectional area of ​​the second equalizing hole 32, and each first equalizing hole 31 corresponds to multiple second equalizing holes 32. In short, if the second equalizing holes 32 form two rows, one first equalizing hole 31 corresponds to four second equalizing holes 32 (here it is a 1:4 distribution, of course, a 1:6 or 1:8 distribution is also possible). Furthermore, it is precisely because of this size that when the fabric is intact, the pressure bonding is mainly achieved by the second equalizing holes. Once the fabric is broken, it can provide instantaneous pressure and, combined with the downward trend, make the broken fabric fall more evenly into and bond with the lower reel, thus achieving optimal winding (note that this is optimal, not necessarily).

[0028] In some specific embodiments, the fabric cutting tool 6 can be concealed between the fabric cutting and flipping shaft 5 and the fabric support rod 8. That is, when the fabric is not being cut, the tool is concealed and protected to avoid damage. In this example, the fabric cutting tool 6 forms multiple serrations 60 arranged side by side at intervals. The tips of the multiple serrations 60 are relatively spaced apart and located on the same straight line. Under the action of these serrations, the fabric can be cut instantly and synchronously, thereby improving the neatness and accuracy of the fabric cutting. Furthermore, the fabric cutting tool 6 includes a first serrated blade 61 and a second serrated blade 62 that are relatively flush and fitted together. The tips of the first serrated blade 61 and the second serrated blade 62 are relatively staggered and fitted together, that is, a single serration 60 is formed between two adjacent tips. This results in a denser arrangement of tips, which is more conducive to penetrating the fabric to form a cut. The fabric cutting power unit 7 includes fabric cutting power units 70 that move synchronously at both ends of the fabric cutting and flipping shaft 5. Each fabric cutting power unit 70 includes an end plate 700 fixed to the end of the fabric cutting and flipping shaft 5, a mounting base 701 fixed to the air box 2, and telescopic rods 702 rotatably mounted at both ends between the end plate 700 and the mounting base 701, respectively. The telescopic rods 702 extend and retract to drive the mounting base 701 and the fabric cutting and flipping shaft 5 to rotate synchronously. Specifically, the telescopic rods are pneumatically powered, with one part of the air passage connected to the telescopic rod and the other part connected to the air box.

[0029] In summary, the implementation process of this embodiment is as follows: When the fabric is cut, the sawtooth cross-cutting fabric cutting mechanism D is adjusted to the roll changing station H and located above the roll changing shaft M. The fabric passes through the roll changing shaft M, moves to the right and upward to adhere to the flow equalization cover 3, and then is conveyed to the left-side winding station S. The first airflow is perpendicular to the fabric and tilts to the right and upward, and the fabric blocks the first flow equalization hole 31. The second airflow blows downward and to the right (blowing downward from the two rows of second flow equalization holes 32). At this time, the fabric is relatively adhered to the left and top of the roll changing shaft (note that there is not too much wrapping to avoid the roll changing shaft rotating and affecting the fabric tension control). Then, the flipping of the fabric cutting flipping shaft 5 causes the sawtooth 60 to support the fabric and flip upward synchronously with the fabric conveying until the sawtooth penetrates the fabric to cut it. At this time, under the instantaneous blowing of the first airflow, the fabric flips downward and adheres to and wraps around the right side of the roll changing shaft M. At the same time, based on the rotation of the roll changing shaft M, it is wound up without stopping the machine. The front end of the cut fabric is wound up by the winding station S.

[0030] It should also be noted that the fabric length between the break point and the bonding and rewinding shaft M is equal to 3 / 4 of the circumference of the rewinding shaft M. This allows for continuous winding and rewinding during the bonding and rotation process.

[0031] In summary, when using this fabric cutting mechanism, during fabric cutting, the sawtooth transverse cutting mechanism is adjusted to the roll-changing station and located above the roll-changing shaft. The fabric passes through the roll-changing shaft to the right and upwards, adhering to the flow equalization hood, and is then conveyed to the left-side winding station. The first airflow is perpendicular to the fabric and tilts upwards to the right, and the fabric blocks the first flow equalization hole. The second airflow blows downwards and to the right, causing the fabric to adhere relatively to the left and top sides of the roll-changing shaft. Then, the fabric cutting blade moves synchronously with the fabric from bottom to top, gradually penetrating the fabric with the sawtooth to form a cut. The cut rear end of the fabric is instantly blown by the first airflow and unfolds accordingly, adhering to and wrapping around the right side of the rotating roll-changing shaft for roll-changing. The cut front end of the fabric is wound towards the winding station. The workstation forms a roll-up mechanism. Therefore, this invention, on the one hand, is based on the parallel and aligned saw teeth performing a penetrating cut while moving synchronously with the fabric, without being limited by the fabric width, resulting in neat cuts, high quality, and minimal waste. On the other hand, based on the coordination of two airflows, the fabric is first blown and pressed against the roll-up shaft, and then at the moment of fabric breakage, the airflow sweeps and falls the fabric, along with the rotation of the roll-up shaft, to roll the fabric again, thus achieving coordinated transmission between fabric breakage and roll-up, completing the fabric transfer and roll-up assistance. Thirdly, the fabric length between the breakage position and the roll-up shaft is less than or equal to 3 / 4 of the roll-up shaft's circumference, and the cross-sectional area of ​​the first flow equalization hole is the same as the cross-sectional area of ​​the second flow equalization hole. More than 10 times larger. To explain further, it is precisely because of this size that, when the fabric is intact, pressure bonding is mainly achieved through the second equalizing holes. Once the fabric is broken, it can provide instantaneous pressure, combined with the downward trend, to make the cut fabric fall more smoothly into and bond with the lower rewinding shaft. This achieves optimal winding (note that this is optimal, not necessarily), that is, continuous and wrinkle-free or layer-free winding and winding during bonding and rotation. Fourthly, there are at least two rows of second equalizing holes, with multiple rows of second equalizing holes distributed at intervals from the middle of the lower rewinding shaft to the right. The airflow generated in this way can make the cut fabric bond more smoothly to the rewinding shaft, so as to facilitate the rewinding process. The process involves winding and coiling, with each first flow equalization hole corresponding to multiple second flow equalization holes. In short, if two rows of second flow equalization holes are formed, one first flow equalization hole corresponds to four second flow equalization holes (here, the ratio is 1:4, but 1:6 or 1:8 is also possible). Fifthly, the tension formed by the fabric support rod and the flow equalization hood flattens the fabric, and then the fabric cutting tool cuts through the fabric while it is flattened. At the same time, the tool is concealed and protected when the fabric is not being cut to avoid damage to the tool. Sixthly, the tips of the first and second serrated blades are relatively misaligned and fit together, resulting in a denser arrangement of tips, which is more conducive to penetrating the fabric and forming a cut.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sawtooth cross-cutting process for textile fabrics, characterized in that, Includes the following steps: S1, Position Adjustment The sawtooth cross-cutting fabric cutting mechanism is adjusted to the roll changing station and located above the roll changing shaft. After the fabric passes through the roll changing shaft to the right and upward to adhere to the sawtooth cross-cutting fabric cutting mechanism, it is transferred to the left-side winding station. The sawtooth cross-cutting fabric cutting mechanism forms first flow equalization holes and second flow equalization holes that are evenly spaced along its own length direction. The airflow blown out from the first flow equalization holes and the second flow equalization holes are defined as the first airflow and the second airflow, respectively. The cross-sectional area of ​​each first flow equalization hole is larger than the cross-sectional area of ​​each second flow equalization hole. S2, Blowing away the broken cloth The first airflow is perpendicular to the cloth and tilts upwards and to the right, with the cloth blocking the first flow equalization hole. The second airflow blows downwards and to the right, causing the cloth to relatively adhere to the left and top sides of the rewinding shaft. The cloth-cutting blade of the sawtooth transverse cutting mechanism moves synchronously with the cloth from bottom to top, and the saw teeth with relatively misaligned and adhered gradually penetrate the cloth to form a cut. The cut rear end of the cloth is instantly blown by the first airflow and unfolds to adhere to and wrap around the right side of the rotating rewinding shaft. The length of the cloth between the cut position and the adhered rewinding shaft is less than or equal to 3 / 4 of the circumference of the rewinding shaft. The cloth-cutting blade includes a first sawtooth blade and a second sawtooth blade that are relatively flush and adhered, with the tips of the first sawtooth blade and the second sawtooth blade being relatively misaligned and adhered to on the same straight line. The system includes fixed seats that rotate around the center of the transmission roller and are installed at both ends of the transmission roller; a bellows located between the two fixed seats and forming an air cavity inside; a flow equalization hood installed at the air outlet of the bellows; multiple arc support seats installed side by side on the bellows; a fabric breaking and turning shaft with the center of the arc as the rotation center and fitted to the multiple arc support seats; fabric breaking cutters installed on the fabric breaking and turning shaft and arranged side by side with serrations; a fabric breaking power unit capable of driving the fabric breaking and turning shaft to turn; and a fabric support frame rod. The flow equalization hood extends along the length of the bellows and forms a first flow equalization hole on the side of the air outlet pipe facing the bellows, corresponding to the air outlet pipe. The second flow equalization hole is perpendicular to the first flow equalization hole and located at the bottom of the flow equalization hood. When the fabric is broken, the fabric fits against the fabric support frame rod and the flow equalization hood.

2. The sawtooth cross-cutting fabric cutting process for textiles according to claim 1, characterized in that, The directions of the first airflow and the second airflow are perpendicular to each other.

3. The sawtooth cross-cutting fabric cutting process for textiles according to claim 1, characterized in that, Each of the first flow equalization orifices corresponds to a plurality of the second flow equalization orifices.

4. The sawtooth cross-cutting fabric cutting process for textiles according to claim 3, characterized in that, Each first flow equalization orifice corresponds to 4, 6, or 8 second flow equalization orifices.

5. The sawtooth cross-cutting fabric cutting process for textiles according to claim 3, characterized in that, The second flow equalization orifice has at least two rows, wherein multiple rows of the second flow equalization orifice are distributed at intervals.

6. The sawtooth cross-cutting fabric cutting process for textiles according to claim 1, characterized in that: The cross-sections of the bellows, flow equalization hood, and fabric support rod are all U-shaped. The bellows and flow equalization hood are aligned and arranged side by side. The arc support base and fabric support rod are fixed on the bellows and flow equalization hood respectively. The fixed base is equipped with a sealing plate that closes the ends of the U-shaped bellows, flow equalization hood, and fabric support rod.

7. The sawtooth cross-cutting fabric cutting process for textiles according to claim 6, characterized in that: The bellows has an inlet pipe and an outlet pipe, with multiple outlet pipes arranged side by side at intervals along the length of the bellows, and multiple inlet pipes arranged perpendicular to the outlet pipes; the arc support includes a base body fixed on the bellows, with an outward-facing arc groove formed on the base body, and the fabric flipping shaft is installed in multiple aligned arc grooves.

8. The sawtooth cross-cutting process for textile fabrics according to claim 7, characterized in that: The fabric cutting tool can be concealed between the fabric cutting and turning shaft and the fabric support rod.

9. The sawtooth cross-cutting process for textile fabrics according to claim 7, characterized in that: The fabric cutting power unit includes fabric cutting power units located at both ends of the fabric cutting and flipping shaft and moving synchronously. Each fabric cutting power unit includes an end plate fixed to the end of the fabric cutting and flipping shaft, a mounting base fixed to the air box, and a telescopic rod rotatably mounted at both ends between the end plate and the mounting base, wherein the telescopic rod moves to extend and retract to drive the mounting base and the fabric cutting and flipping shaft to rotate synchronously.

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