A film knitting machine

Abstract

The present invention relates to a thin film knitting machine, which includes a warp unwinding device, a guiding device, a shed device, a weft inserting device, and a knitting and winding device. The weft inserting device is correspondingly arranged with the shed formed by the shed device. The weft inserting device includes a weft-wise conveying mechanism, a main pick-up device, a left pick-up device, and a right pick-up device respectively arranged below the weft-wise conveying mechanism. A lifting mechanism is arranged between the weft-wise conveying mechanism and the main pick-up device, and displacement mechanisms are respectively and correspondingly arranged between the weft-wise conveying mechanism and the left pick-up device and the right pick-up device. The warp unwinding shaft of the present invention can keep the warp thin film under constant tension, and at the same time, the warp unwinding shaft can also retract the film warp to close the shed. The weft inserting device can complete the weft inserting and beating-up actions simultaneously, improving the production efficiency. Multiple weft yarn unwinding is adopted to cut and supply multiple weft yarns of fixed length at one time.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile machines, and particularly relates to a film knitting machine. Background Art

[0002] A new method and device for weaving strip-shaped warp yarns and strip-shaped weft yarns are described in CN101120128B and CN101120129B. This textile process can process different types of strip materials to manufacture fabric materials for various technical applications, such as bulletproof devices, conveyor belts, liquid discharge plates, etc., and is not only used for composite material applications. Using warp yarns and weft yarns in the form of strips gives the project higher performance than ever before. However, in this textile process, the supplied warp yarns are without tension, the unwinding shaft is a common fixed support, and multiple bobbins with different coil diameters are placed on the same fixed support. Although this design can adapt to different types of strip materials and avoid shearing, deformation or easy aggregation of the strips, especially fiber strips, when the strips woven by this design are ultra-high molecular weight polyethylene films with a relatively thin thickness, the warp strips at the shed cannot be completely flattened in the tensionless state. This leads to the weft insertion mechanism being unable to enter the shed normally, affecting the quality of the fabric and the normal progress of production. Moreover, the warp yarn supply device used to supply constant-length tensionless warp yarns in this design has a complex structure, which is not conducive to the stable and efficient operation of the textile machine.

[0003] When this production method is used to weave ultra-high molecular weight polyethylene films, neither the labor intensity, time consumption and failure rate nor the product quality is satisfactory. The simple fixed support for unwinding causes the material change time to be too long, and long-time stops often occur.

[0004] Textile machines using a slip shaft as the unwinding shaft in the prior art also have similar disadvantages. In addition, when using a slip shaft as the unwinding shaft, multiple bobbins are placed on one slip shaft, and only one coil diameter sensor can be installed. Because in actual production, it is very difficult to make the diameters of the bobbins exactly the same, this results in inconsistent tensions of the bobbins on the same slip shaft.

[0005] A warp yarn release device is described in CN103429803B. The warp yarn is supplied through a movable contact surface of a rolling member for opening the shed and winding, and the warp yarn can also be retracted for closing the shed. The advantage of this device is that it can measure and control the warp yarn for shed opening and winding operations without clamping the warp yarn, overcoming problems such as sliding of the warp yarn belt, fiber breakage, and deformation caused by indentation. However, when this device is used for warp yarns of ultra-high molecular weight polyethylene films with a relatively thin thickness, the warp yarn strips may have inconsistent tightness due to no tension or small tension, which may lead to abnormal weft insertion and also affect the flatness of the fabric.

[0006] In the prior art, the shed is formed by heddles or rotors, and this method needs to be carried out under high tension, which causes abrasion to the warp yarns; the existing weft yarn supply device can only supply a single weft yarn each time.

[0007] The above situations seriously affect the product quality, reduce the production efficiency at the same time, and restrict the development of production and equipment modernization. It is urgent for those skilled in the art to develop a new film warp yarn supply device that can improve the product quality and labor efficiency and reduce the labor intensity for production. Summary of the Invention

[0008] The purpose of the present invention is to provide a film knitting machine to solve the problems existing in the prior art.

[0009] The technical solution of the present invention is as follows:

[0010] A film knitting machine includes a warp yarn unwinding device, a guiding device, a shed device, an inserting weft device, and a knitting and winding device. The inserting weft device is correspondingly arranged with the shed formed by the shed device. The inserting weft device includes a weft direction transmission mechanism, a main pick-up device, a left pick-up device, and a right pick-up device respectively arranged below the weft direction transmission mechanism. A lifting mechanism is arranged between the weft direction transmission mechanism and the main pick-up device, and displacement mechanisms are respectively correspondingly arranged between the weft direction transmission mechanism and the left pick-up device and the right pick-up device.

[0011] Further, the displacement mechanism includes a longitudinal translator and a vertical lifter arranged at the lower part of the longitudinal translator. The longitudinal translators are respectively arranged on the weft direction transmission mechanisms on the left and right sides of the main pick-up device, and the vertical lifters are respectively correspondingly arranged on the upper parts of the left pick-up device and the right pick-up device.

[0012] Further, a weft yarn cutting and conveying device is arranged on the side of the shed. The weft yarn cutting and conveying device includes a conveyor belt arranged parallel to the warp yarns and a weft yarn unwinding roller arranged on one side of the input end of the conveyor belt. The weft yarn unwinding direction of the weft yarn unwinding roller is orthogonally arranged with the direction of the conveyor belt. A weft yarn cutting machine corresponding to the weft yarn unwinding roller is arranged above the side edge of the conveyor belt, and the output end of the conveyor belt is correspondingly arranged below the inserting weft device.

[0013] Further, the warp yarn unwinding device includes at least two bases and warp yarn unwinding shaft brackets respectively arranged at intervals on the bases. Warp yarn unwinding shafts are arranged on the warp yarn unwinding shaft brackets, a torque motor is arranged at one end of the warp yarn unwinding shaft, and the warp yarn unwinding shafts between the bases are correspondingly staggered.

[0014] Furthermore, the shed device includes two warp yarn dispersion mechanisms arranged side by side. The warp yarn dispersion mechanism includes a support beam and a telescopic mechanism respectively arranged at the lower part of the support beam. The upper part of the support beam is provided with support rods arranged at intervals, and the top of the support rod is provided with a guide roller. The support rods on the two warp yarn dispersion mechanisms are arranged corresponding to each other in a staggered manner.

[0015] Preferably, the weft transfer mechanism includes a guide rail, which is composed of a guide rail groove and a slide rail embedded in the guide rail groove. The main pick-up device is arranged at the lower part of the slide rail through the lifting mechanism. The left pick-up device and the right pick-up device respectively arranged on both sides of the main pick-up device are arranged at the lower part of the slide rail through the displacement mechanism. The guide rail groove is arranged on the weft transfer support.

[0016] Preferably, the main pick-up device, the left pick-up device, and the right pick-up device are all suction cups.

[0017] The positive effects of the present invention are as follows:

[0018] 1. Provide a unwind technology with multi-axis unwinding. One warp yarn unwind shaft places one roll of material, which is convenient for loading the material; the warp yarn unwind shaft can keep the warp yarn film under constant tension, that is, the application of the torque motor for unwinding: during the conveying process, the torque motor applies a tension to the warp yarn in the opposite direction of the transmission direction, and at the same time, as the roll diameter decreases, the torque decreases, so as to keep the warp yarn tension constant; at the same time, the warp yarn unwind shaft can also retract the warp yarn of the film to close the shed, that is, the winding function of the torque motor; during the formation of the shed and the formation of the next shed, the motor is in a stalled state for some time.

[0019] 2. The top of the warp yarn dispersion mechanism is provided with a guide roller, which can avoid the abrasion of the warp yarn and has a wider adaptability to the material of the warp yarn.

[0020] 3. The weft inserting device can complete the weft inserting and beating-up actions at the same time, improving the production efficiency.

[0021] 4. Adopt multiple weft yarn unwinds to cut and supply multiple fixed-length weft yarns at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall working structure of the knitting machine in the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the unwind device in the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the warp yarn dispersion mechanism in the present invention.

[0025] Figure 4 It is a schematic diagram of the weft yarn pick-up structure after the weft yarn is cut in the present invention.

[0026] Figure 5 One of the schematic structural diagrams of the weft inserting device in the present invention.

[0027] Figure 6 Another schematic structural diagram of the weft inserting device in the present invention.

[0028] Figure 7 Top view structural diagram of the weft yarn cutting, picking and inserting of the loom in the present invention.

[0029] Figure 8 Schematic structural diagram of the composite device in the present invention.

[0030] In the figure: warp unwinding device (10), base (11), warp unwinding shaft bracket (12), warp unwinding shaft (13), torque motor (14);

[0031] Guiding device (20), guiding roller (21), floating roller (22), warp guiding roller (23), back pressure roller (24);

[0032] Shed device (30), support beam (31), telescopic mechanism (32), support rod (33), guiding drum (34);

[0033] Weft inserting device (40), weft direction conveying mechanism (41), main picker (42), left picker (43), right picker (44), lifting mechanism (45), displacement mechanism (46), longitudinal translator (47), vertical lifter (48), guide rail groove (411), slide rail (412), weft direction conveying bracket (413);

[0034] Weft yarn cutting and conveying device (50), conveyor belt (51), weft yarn unwinding roller (52), weft yarn cutting cross beam (53), cutting knife (54), suction cup (55), cutting and unwinding suction cup track (56); knitting and winding device (60);

[0035] Pressure roller (70), pattern roller (71), protrusion (72), heating plate (73). Detailed implementation manners

[0036] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In addition, it should be noted that in order to avoid obscuring the present invention due to unnecessary details, only the device structures closely related to the present invention are described in the drawings and the description, and the representation and description of components and processes that are not closely related to the invention and are known to those of ordinary skill in the art are omitted.

[0038] Embodiment 1: As Figure 1 and Figure 2 shown, a film knitting machine includes a warp unwinding device 10, a guiding device 20, a shed device 30, a weft inserting device 40, and a knitting and winding device 60. The weft inserting device 40 is correspondingly arranged with the shed formed by the shed device 30.

[0039] Here, the warp unwinding device 10 includes four bases 11 and warp unwinding shaft brackets 12 respectively and spacedly arranged on each base 11. A warp unwinding shaft 13 and a torque motor 14 are arranged on the square shaft bracket 12. The warp unwinding shaft 13 is connected to the drive shaft of the torque motor 14. The warp unwinding shafts 13 on the four bases 11 are correspondingly staggered.

[0040] The warp unwinding shaft 13 in the warp unwinding device 10 is mainly used for loading the warp film and separately unwinding it to supply the warp respectively to assist in the formation of the downstream shed and the winding of the fabric. The warp unwinding device 10 can also retract the warp to assist in closing the shed. Among them, the warp is supplied in the form of a film rather than in the form of yarn. The separate unwinding reduces the operation difficulty and improves the production efficiency. At the same time, a DC torque motor is adopted to provide a constant tension for the film warp. The plain fabric made based on this warp supply device has high flatness and a compact structure, ensuring the quality of the product.

[0041] Among them, the warp unwinding shaft 13 serves as a warp supply source and places the warp film roll. The warp unwinding shaft 13 is an air shaft, preferably a cantilever air shaft. Each warp unwinding shaft 13 can separately place a roll of warp film. The inflation and deflation of the cantilever air shaft are controlled by an electromagnetic control valve, saving the time for loading or changing the roll and realizing rapid feeding or material change.

[0042] A roll diameter measuring device is also arranged on the warp unwinding shaft bracket 12. The roll diameter measuring device is preferably an ultrasonic sensor. The ultrasonic sensor is arranged on the base 11 directly below each warp unwinding shaft 13 and is mainly used for real-time measuring the roll diameter of the warp film roll, and then feeding back the signal to the controller of the film knitting machine. The controller adjusts the voltage of the torque motor with winding characteristics to realize the change of the drive shaft of the torque motor and the warp unwinding shaft 13, thereby maintaining the constancy of the warp film tension.

[0043] The torque motor 14 is controlled and connected to the ultrasonic sensor through the controller. During the conveying process of the warp film, through the controller, the torque motor 14 applies a tension in the direction opposite to the unwinding direction of the warp film. As the roll diameter of the warp film decreases, the ultrasonic sensor feeds back to the controller, and the output torque of the torque motor 14 of the warp unwinding shaft 13 can be realized to decrease, so as to maintain the constancy of the warp film tension during the running process.

[0044] Here, the position of the warp unwinding roller bracket 12 on the base 11 can be adjusted according to the warp film rolls of different widths to adapt to placement, and the corresponding warp dispersion mechanisms 3a and 3b of different widths are replaced accordingly, so as to obtain fabrics of different widths.

[0045] The number of warp unwinding roller brackets 12 is not limited to Figure 2 the number shown in, and the number of warp unwinding roller brackets 12 can be increased or decreased to weave fabrics of different widths, or to weave fabrics of the same width using warp films of different widths.

[0046] Among them, an auxiliary deviation rectifying device can be provided downstream of the warp unwinding device 10 to prevent the deviation and rectify the warp. Specifically, it is arranged between the warp unwinding roller 13 and the corresponding guiding device 20. Here, this auxiliary deviation rectifying device is a commonly used well-known technology, including the technical content disclosed by Zhang Qian in the literature named Analysis and Application of the Deviation Rectifying Mechanism of Flexible Film Winding and Conveying Systems, or the corresponding technical content disclosed by Zhao Meining et al. in the literature named Automatic Deviation Rectifying Device and Control System for Film in Aseptic Bag Packaging Machine.

[0047] The guiding device 20 is mainly used for guiding the warp film, including a guiding roller 21 and a floating roller 22. The guiding device 20 is installed downstream of each warp unwinding roller 13, as Figure 1 shown; the floating roller 22 is arranged between the two guiding rollers 21 and is used to absorb or buffer the influence of the tension jump of the warp film on the stability of the corresponding warp film.

[0048] A limiting ring is also arranged on the guiding roller 21 to limit the position deviation of each warp film on the guiding roller and facilitate the positioning of the warp during material change; the limiting ring is specifically installed on the guiding roller 21 close to the warp unwinding roller 13, and the distance between adjacent two limiting rings is adjustable to adapt to warp films of different widths.

[0049] The guiding rollers 21 are all chrome-plated steel rollers and can rotate freely to reduce the resistance during the operation of the film. The surface is chrome-plated to increase the surface finish, corrosion resistance and wear resistance, aiming to reduce the resistance and damage of the guiding roller 4 to the warp film.

[0050] The floating roller 22 is made of a steel roller and the surface is chrome-plated. The floating roller 22 is mainly used to store the warp film where it is located and absorb or buffer the influence of the tension jump on the warp stability.

[0051] In order to avoid the influence caused by unwinding multiple warp yarns from the same warp beam simultaneously (such as the difficulty in adjusting and controlling the tension of each warp yarn and the lack of coordination), and to make the textile machine compact, easy to operate and relatively low in cost, the warp unwinding device 10 is designed according to the following principles: (i) Use a DC torque motor to independently control each film warp yarn, that is, the number of warp beams 13 is the same as the number of warp yarns; (ii) The warp beams 13 are arranged in a staggered manner up and down and front and back. The film warp yarns from the warp beams 13 are divided into two groups by the guide rollers 21 as Figure 1 shown, so that the two groups of warp yarns alternately push the warp yarns upward to form a shed under the action of the warp yarn dispersion mechanisms 3a and 3b of the shed device 30.

[0052] As Figure 1 and Figure 3 shown, the shed device 30 includes two warp yarn dispersion mechanisms 3a and 3b arranged side by side. The warp yarn dispersion mechanism includes a support beam 31 and a telescopic mechanism 32 respectively arranged at the lower part of the support beam 31. The upper part of the support beam 31 is provided with support rods 33 arranged at intervals. The top of the support rod 33 is provided with a guide roller 34. The support rods 33 on the two warp yarn dispersion mechanisms are arranged in a corresponding staggered manner. In this embodiment, the telescopic mechanism 32 is a cylinder. In the warp unwinding direction, warp yarn guide rollers 23 and a back pressure roller 24 are respectively arranged upstream and downstream of the shed device 30. In the prior art, opening the shed in the form of a heddle frame or a rotor needs to be carried out under high tension. The heddle frame or the rotor will cause wear to the warp yarn strip, affecting the appearance and performance of the fabric. However, using the warp yarn dispersion mechanisms 3a and 3b to open the shed can be carried out under low tension or even no tension, and the guide roller 34 rotates when the warp yarn strip advances or retracts, without static friction generated, and will not cause wear to the warp yarn strip, making the fabric have a good appearance and stable performance.

[0053] In the next weft insertion device, in the prior art, when the weft yarn strip is horizontally inserted into the shed, the weft yarn will sag due to gravity. Although the problem of sagging due to gravity is improved when the weft yarn strip is vertically inserted into the shed, the effect is still not ideal. For example, in CN 10112012B, a new type of yarn gripper applicable to a positively driven rapier system and a negatively driven projectile system is adopted. The yarn gripper directly accommodates the entire width of the front part of the weft yarn strip at its mouth and holds the weft yarn strip flat. This yarn gripper can insert ribbon-shaped wefts with different widths, thicknesses, materials and structures into the same fabric in a flat and non-deformed state. However, when the warp yarn strip is relatively thin (less than 30 μm) or wide (more than 100 mm), for example, when a ultra-high molecular weight polyethylene strip with a width of 120 mm and a thickness of 20 μm is used as the weft yarn and inserted into the shed, curling or wrinkling will occur in the length direction of the weft yarn, affecting the fabric quality, and the problem of sagging due to gravity still exists. Gravity sagging will directly cause the length of the inserted weft yarn to become longer, thereby affecting beating-up.

[0054] According to the method disclosed in another comparative document USP5455107, a reed is used to beat the weft yarn in a band shape, which causes the lateral deformation of the weft yarn and the warp yarn, and finally leads to the formation of gaps or openings in the fabric; according to the description of another comparative example USP6450208, a set of rollers is used. Through their rotational movement, the weft yarn is aligned at the fell of the cloth. When the rollers rotate, since they slide laterally past the rear band, the rollers only tend to contact and align the front band, that is, it cannot be guaranteed that the weft yarn can be accurately placed at the fell of the cloth every time; in addition, CN101120128 describes a vertical weft yarn band arrangement device. After the gripper head feeds the weft yarn into the shed, the weft yarn band arrangement device grips the weft yarn band and sends the weft yarn band to the fell of the cloth. Although this device can send the weft yarn band flat to the fell of the cloth, due to its separation from the weft insertion device, the weaving efficiency is reduced.

[0055] Therefore, in the weft insertion device 40 provided in the present invention, as Figure 4 , Figure 5 and Figure 6 shown, the weft insertion device 40 includes a weft direction transmission mechanism 41, a main picker 42, a left picker 43, and a right picker 44 respectively arranged below the weft direction transmission mechanism 41. A lifting mechanism 45 is arranged between the weft direction transmission mechanism 41 and the main picker 42, and displacement mechanisms 46 are respectively arranged corresponding to the weft direction transmission mechanism 41 and the left picker 43 and the right picker 44. In this embodiment, the main picker 42, the left picker 43, and the right picker 44 are all suction plates or suction cups, which are used to simultaneously and flatly adsorb the fixed-length weft yarn strip, solve the problem of gravity sag, and at the same time avoid curling and wrinkling.

[0056] After the main picker 42, the left picker 43, and the right picker 44 pick up the fixed-length weft yarn, the weft direction transmission mechanism 41 inserts the fixed-length weft yarn into the shed. After reaching the specified position, the main picker 42 releases the weft yarn, and the left picker 43 and the right picker 44 maintain adsorption to keep the weft yarn in a tensioned state.

[0057] Among them, the weft direction transmission mechanism 41 includes a guide rail, which is composed of a guide rail groove 411 and a slide rail 412 embedded in the guide rail groove. The main picker 42 is arranged at the lower part of the slide rail 412 through the lifting mechanism 45. The left picker 43 and the right picker 44 respectively arranged on both sides of the main picker 42 are arranged at the lower part of the slide rail 412 through the displacement mechanism 46. The guide rail groove 411 is arranged on the weft direction transmission bracket 413. The weft direction transmission mechanism 41 is mainly used to support and move the displacement mechanism 46 as a whole, so that the displacement mechanism 46 can move in a weft direction insertion and contraction manner. After the shed is formed, the slide rail 412 is inserted into the shed in the weft direction to send the fixed-length weft yarn to the specified position to complete the weft insertion action.

[0058] The displacement mechanism 46 includes a longitudinal translator 47 and a vertical lifter 48 disposed at the lower part of the longitudinal translator 47. The longitudinal translator 47 is disposed on the weft transmission mechanism 41 on the left and right sides of the main picker 42, respectively, and the vertical lifter 48 is disposed on the upper part of the left picker 43 and the right picker 44, respectively. In this embodiment, the lifting mechanism 45, the longitudinal translator 47, and the vertical lifter 48 are all cylinders. After the longitudinal translator 47 moves in the winding direction to deliver the weft yarn to the cloth fell, the left picker 43 and the right picker 44 release the weft yarn to complete the beating. The weft insertion action and the beating action are continuous, and there is no time interval in between, which improves the textile efficiency. The lifting mechanism 45 and the vertical lifter 48 in the displacement mechanism 46 are lowered downward to make the left picker 43, the main picker 42 and the right picker 44 fall onto the corresponding fixed-length weft yarn, and the fixed-length weft yarn is completely flatly adsorbed and lifted for picking up. After the slide rail 412 is inserted into the shuttle mouth along the weft direction and the main picker 42 stops adsorption, the longitudinal translator 47 moves forward and the vertical lifter 48 moves downward at the same time, thereby driving the fixed-length weft yarn to complete the beating action.

[0059] like Figure 7 As shown, a weft cutting and conveying device 50 is arranged on the side of the shed, and the weft cutting and conveying device includes a conveyor belt 51 arranged parallel to the warp yarn and a weft unwinding roller 52 arranged on one side of the input end of the conveyor belt 51. The weft unwinding direction of the weft unwinding roller is arranged orthogonally to the direction of the conveyor belt. A weft cutting machine corresponding to the weft unwinding roller 52 is arranged on the upper side of the conveyor belt 51, and the output end of the conveyor belt 51 is correspondingly arranged below the weft insertion device 40. The weft cutting and conveying device 50 is mainly used to cut the weft yarn of the package to a fixed length and transport it to the corresponding position, so that the left picker 43, the main picker 42, and the right picker 44 can adsorb and pick it up.

[0060] The weft yarn cutting machine comprises a cutting beam 53 and a cutting track 56 . A cutting knife 54 is arranged on one side of the cutting beam 53 , and a weft yarn unwinding and stretching suction cup 55 is arranged on the cutting track 56 .

[0061] Here, after the weaving is completed, the film can be bonded together by a composite device before being rolled up. The composite here includes hot melting, ultrasonic or other methods to fix the warp and weft yarns of the fabric into a whole. In this embodiment, hot melting composite is used to avoid the relative displacement of the warp and weft yarns causing the fabric to loosen. The composite device includes a pressure roller 70 and a pattern roller 71. A heating plate 73 is arranged in the middle of the pattern roller. A protrusion 72 is arranged on the arc surface of the heating plate 73. The composite device is correspondingly arranged between the rear pressure roller 24 and the weaving winding device 60. Figure 8 shown.

[0062] The weaving and winding device 60 mainly winds up the woven film through a winding roller.

[0063] During the weaving operation of the film weaving machine, through the controller:

[0064] (1) First, the film warp is provided by the warp unwinding device 10;

[0065] (2) The warp film is pushed upward by the warp spreading mechanism 3a to form a shed;

[0066] (3) The weft insertion device 40 conveys the cut-to-length film weft through the conveyor belt 51 to the lower part of the corresponding left picker 43, main picker 42, and right picker 44, and descends through the corresponding lifting mechanism 45 and vertical lifter 48, and picks it up. Then, it is completely inserted into the shed in the weft direction through the slide rail 412. Then, the controller releases the cut-to-length film weft picked up by the main picker 42 in the middle. That is, at this time, the cut-to-length film weft is only adsorbed and fixed by the left picker 43 and the right picker 44 at the left and right ends. Then, the longitudinal translator 47 drives the cut-to-length film weft to move along the warp unwinding direction, and sends the cut-to-length film weft to the trailing edge of the previous cut-to-length film weft to complete the beating-up action;

[0067] (4) The woven fabric is curled, and the length of each curl is the width of the weft;

[0068] (5) The warp spreading mechanism 3a moves downward, and at the same time, the warp where it is located is retracted by the corresponding warp winding shaft 13 to close the shed. At the same time, the warp spreading mechanism 3b pushes up the corresponding warp to form a shed again;

[0069] (6) Repeat steps (3) and (4);

[0070] (7) Perform the next cycle of steps (1) to (6) to continuously manufacture plain fabric. Among them, before step (4), that is, before winding through the weaving winding device (60), the woven fabric is edge-sealed: the warp on both sides of the fabric is fixed to the corresponding weft by hot melting, ultrasonic or other methods to form a selvage to prevent the warp and weft from relative displacement and causing the fabric to loosen.

[0071] In this embodiment, both the warp and the weft are ultra-high molecular weight polyethylene films, and the corresponding parameters of the ultra-high polyethylene film satisfy at least one or more of the following:

[0072] Width above 50 mm;

[0073] Thickness below 0.1 mm;

[0074] Breaking strength above 10 g / denier;

[0075] Tensile modulus above 1000 g / denier;

[0076] Elongation at break below 5%.

[0077] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A film knitting machine, comprising a warp unwinding device (10), a guiding device (20), a shed device (30), a weft inserting device (40), and a knitting and winding device (60), wherein the weft inserting device (40) is arranged corresponding to the shed formed by the shed device (30), and is characterized in that: The weft inserting device (40) includes a weft direction conveying mechanism (41), a main pick-up device (42), a left pick-up device (43), and a right pick-up device (44) which are respectively arranged below the weft direction conveying mechanism (41). A lifting mechanism (45) is arranged between the weft direction conveying mechanism (41) and the main pick-up device (42), and displacement mechanisms (46) are respectively arranged corresponding to between the weft direction conveying mechanism (41) and the left pick-up device (43) and the right pick-up device (44).

2. The thin film knitting machine according to claim 1, characterized in that: The displacement mechanism (46) includes a longitudinal translator (47) and a vertical lifter (48) arranged at the lower part of the longitudinal translator (47). The longitudinal translator (47) is respectively arranged on the weft direction conveying mechanism (41) on the left and right sides of the main pick-up device (42), and the vertical lifter (48) is respectively arranged corresponding to the upper parts of the left pick-up device (43) and the right pick-up device (44).

3. A film knitting machine according to claim 1, characterized in that: A weft yarn cutting and conveying device (50) is arranged on the side of the shed. The weft yarn cutting and conveying device includes a conveyor belt (51) arranged parallel to the warp yarns and a weft yarn unwinding roller (52) arranged on one side of the input end of the conveyor belt (51). The weft yarn unwinding direction of the weft yarn unwinding roller is arranged orthogonally to the conveyor belt direction. A weft yarn cutting machine corresponding to the weft yarn unwinding roller (52) is arranged above the side edge of the conveyor belt (51), and the output end of the conveyor belt (51) is correspondingly arranged below the weft inserting device (40).

4. A film knitting machine according to claim 1, characterized in that: The warp yarn unwinding device (10) includes at least two bases (11) and warp yarn unwinding shaft brackets (12) respectively arranged at intervals on the bases (11). A warp yarn unwinding shaft (13) is arranged on the warp yarn unwinding shaft bracket (12), and a torque motor (14) is arranged at one end of the warp yarn unwinding shaft (13). The warp yarn unwinding shafts (13) between the bases (11) are arranged corresponding to be staggered.

5. A film knitting machine according to claim 1, characterized in that: The shed device (30) includes two warp yarn dispersion mechanisms arranged side by side. The warp yarn dispersion mechanism includes a support beam (31) and a telescopic mechanism (32) respectively arranged at the lower part of the support beam (31). The upper part of the support beam (31) is arranged with support rods (33) at intervals, and a guide roller (34) is arranged at the top of the support rod (33). The support rods (33) on the two warp yarn dispersion mechanisms are arranged corresponding to be staggered.

6. A film knitting machine according to claim 1, characterized in that: The weft direction conveying mechanism (41) includes a guide rail which is composed of a guide rail groove (411) and a slide rail (412) embedded in the guide rail groove. The main pick-up device (42) is arranged at the lower part of the slide rail (412) through the lifting mechanism (45). The left pick-up device (43) and the right pick-up device (44) respectively arranged on both sides of the main pick-up device (42) are respectively arranged at the lower part of the slide rail (412) through the displacement mechanism (46). The guide rail groove (411) is arranged on a weft direction conveying support (413).

7. A film knitting machine according to claim 1, characterized in that: The main pick-up device (42), the left pick-up device (43), and the right pick-up device (44) are all suction cups.

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