Weft feeding device for full-width laid-in warp knitting machine

Abstract

The application relates to a weft feeding device applied to a full-width weft insertion warp knitting machine and relates to the field of textiles. The weft tension in the full-width weft insertion warp knitting machine is adjusted through the cooperation of a creel, a tension adjusting mechanism and a dividing guide, so that the weaving process is more stable and smooth, and the overall weaving quality of products is further improved. In addition, in view of the current situation that the rectangular segmented rotary creel is turned over one by one by manual work, the unique structural design of a worm wheel in a transmission mechanism realizes the coexistence of the collective turning mode and the separate turning mode of the creel, the automation is realized, the work efficiency is improved, and the flexibility is maintained.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a weft feeding device for a full-width weft-inserting warp knitting machine. Background Technology

[0002] The main characteristic of multiaxial warp-knitted fabrics is that the yarns are laid out in a parallel and straight state within the fabric, thus fully utilizing the physical properties of the yarns and highlighting the characteristics of multiaxial warp-knitted fabrics. Laying the yarns out in a parallel and straight state within the fabric is the most crucial step in multiaxial fabric production and is also the key factor affecting the quality of the fabric. Multiaxial warp knitting machines combine automation control technology, textile technology, and other technologies to achieve the process of weaving multiaxial fabrics.

[0003] Currently, the main feature of multiaxial warp knitting machines is that they have a weft-laying carriage. The weft-laying carriage lays the parallel straight yarns into the conveyor chain according to the process requirements, and then the conveyor chain transports them to the knitting area for knitting. Through the changes in the structure of the binding yarns, the multiple layers of yarns that have been laid are bound together to form a multiaxial warp-knitted fabric with a special structure.

[0004] However, during the weft laying process, the tension of the weft yarn will fluctuate greatly, which will have a significant impact on the quality of the fabric and will also cause the weft yarn to break from time to time during the weaving process of the full-width weft-inserted warp knitting machine. Summary of the Invention

[0005] The purpose of this application is to provide a weft feeding device for a full-width weft-inserted warp knitting machine to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, this application provides a weft feeding device for a full-width weft-inserting warp knitting machine, including a yarn frame, a weft-laying trolley located on one side of the yarn frame, and a reed divider located between the yarn frame and the weft-laying trolley; multiple sets of bobbin frames are rotatably connected inside the yarn frame, and the multiple sets of bobbin frames can coexist in a collective flipping mode or an individual flipping mode through a transmission mechanism; multiple sets of tension adjustment mechanisms are installed on the side of the yarn frame near the reed divider, and each set of bobbin frames corresponds to one set of tension adjustment mechanisms; a reed divider is installed inside the reed divider that can move up and down; wherein, when the transmission mechanism drives the multiple sets of bobbin frames to flip, the weft yarn on the bobbin frames passes sequentially through the tension adjustment mechanism and the reed divider, and is then laid into the conveyor chain by the weft-laying trolley, and then conveyed to the knitting area by the conveyor chain for knitting.

[0008] In one possible implementation, the tension adjustment mechanism includes:

[0009] Mounting base fixed to the yarn frame;

[0010] The mandrel mounted on the mounting base;

[0011] From bottom to top, a tension disc and a tension washer are movably fitted onto the mandrel; and a guide roller is mounted on the mounting base and located on one side of the mandrel;

[0012] When the weft yarn is introduced into the tension adjustment mechanism, the weft yarn is drawn out after passing through the tension disc, around the mandrel, and around the guide roller.

[0013] In one possible implementation, the tension adjustment mechanism further includes a buffer felt block movably sleeved on the mandrel and located between the tension disc and the tension washer, for buffering the jumping of the tension washer and reducing the tension fluctuation rate.

[0014] In one possible implementation, the reed is provided with multiple sets of elongated holes evenly spaced apart, and a sealing reed eye is provided in the middle between every two sets of elongated holes. The weft yarn passes through the elongated holes and the sealing reed eye in sequence. When the reed moves up and down within the reed frame, the weft yarn in the elongated holes is not moved, while the weft yarn in the sealing reed eye moves with the reed, thereby achieving the splitting.

[0015] In one possible implementation, the material of the elongated hole is ceramic.

[0016] In one possible implementation, the yarn frame includes two sets of longitudinal beams and two sets of transverse beams arranged opposite each other, the longitudinal beams and the transverse beams being perpendicular to each other; multiple sets of yarn bobbin frames are rotatably connected to the longitudinal beams via a pivot shaft, and the multiple sets of yarn bobbin frames are evenly spaced along the direction of the longitudinal beams; multiple sets of tension adjustment mechanisms are installed on a transverse beam near the side of the reed frame, and the multiple sets of tension adjustment mechanisms are evenly spaced along the direction of the transverse beams.

[0017] In one possible implementation, the transmission mechanism includes:

[0018] The worm shaft is arranged along the direction of the longitudinal beam;

[0019] Multiple sets of worms sleeved on the worm shaft; and

[0020] Multiple sets of worm gears are sleeved on the rotating shaft and mesh with multiple sets of worm gears;

[0021] Each set of cylinder frames corresponds to a set of worm gears and a set of worm wheels.

[0022] In one possible implementation, the worm gear includes:

[0023] An inner ring fixedly sleeved on the rotating shaft;

[0024] An outer ring, which is rotatably fitted onto the outside of the inner ring via a number of ball bearings;

[0025] A support head, the first end of which is hinged to one side of the inner ring; and

[0026] A compression spring with its first end connected to one side of the inner ring and its second end connected to the middle of the support head;

[0027] The outer ring has teeth on its outer side that mesh with the worm gear, and a ratchet tooth in the middle of the outer ring that is connected to the second end of the support head.

[0028] In one possible implementation, the worm shaft is driven by its own drive motor.

[0029] Secondly, this application provides a full-width weft-inserting warp knitting machine, including the weft feeding device applied to the full-width weft-inserting warp knitting machine as described above.

[0030] The beneficial effects of the technical solution provided in this application include at least the following:

[0031] By using the yarn frame, tension adjustment mechanism, and reed divider in combination, the tension of the weft yarn in the full-width weft-inserted warp knitting machine is adjusted, making the weaving process more stable and smooth, and further improving the overall weaving quality of the product. In addition, in view of the current situation where rectangular segmented rotating bobbins rely on manual individual flipping, this application realizes the coexistence of collective flipping and individual flipping of the bobbins through the unique structural design of the worm gear in the transmission mechanism, achieving automation and improving work efficiency while maintaining the flexibility of use. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This invention provides a schematic diagram of the structure of a weft feeding device for a full-width weft-inserting warp knitting machine, according to an exemplary embodiment of this application.

[0034] Figure 2 This invention provides a schematic diagram of the tension adjustment mechanism of a weft feeding device for a full-width weft-inserting warp knitting machine, according to an exemplary embodiment of this application.

[0035] Figure 3 This illustration shows a schematic diagram of the reed of a weft feeding device applied to a full-width weft-inserted warp knitting machine, provided by an exemplary embodiment of this application.

[0036] Figure 4 This invention provides a schematic diagram of the worm gear structure of a weft feeding device for a full-width weft-inserting warp knitting machine, according to an exemplary embodiment of this application.

[0037] In the picture:

[0038] 1. Yarn frame; 2. Reed divider frame; 3. Weft laying carriage; 4. Weft yarn;

[0039] 11. Cylindrical frame; 12. Transmission mechanism; 13. Tension adjustment mechanism; 14. Longitudinal beam; 15. Crossbeam;

[0040] 21. Divide the reed;

[0041] 111. Shaft;

[0042] 121. Worm shaft; 122. Worm; 123. Worm wheel;

[0043] 131. Mounting base; 132. Mandrel; 133. Tension disc; 134. Tension washer; 135. Guide roller; 136. Buffer felt block;

[0044] 211. Long eyelet; 212. Sealed reed eyelet;

[0045] 1231. Inner ring; 1232. Outer ring; 1233. Support head; 1234. Compression spring;

[0046] 12321, gear teeth; 12322, ratchet teeth. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.

[0049] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0050] Figure 1 This illustration shows a schematic diagram of a weft feeding device for a full-width weft-inserting warp knitting machine according to an exemplary embodiment of this application. The weft feeding device includes a yarn frame 1, a weft laying trolley 3 located on one side of the yarn frame 1, and a reed splitting frame 2 located between the yarn frame 1 and the weft laying trolley 3. Multiple sets of bobbin frames 11 are rotatably connected inside the yarn frame 1. The multiple sets of bobbin frames 11 can coexist in a collective flipping mode or an individual flipping mode through a transmission mechanism 12. Multiple sets of tension adjustment mechanisms 13 are installed on the side of the yarn frame 1 close to the reed splitting frame 2. Each set of bobbin frames 11 corresponds to a set of tension adjustment mechanisms 13. Reed splitting reeds 21 are installed inside the reed splitting frame 2 and can move up and down. When the transmission mechanism 12 drives the multiple sets of bobbin frames 11 to flip, the weft yarn 4 on the bobbin frames 11 passes through the tension adjustment mechanism 13 and the reed splitting reed 21 in sequence, and is then laid into the conveyor chain by the weft laying trolley 3, and then conveyed to the knitting area by the conveyor chain for knitting.

[0051] In this embodiment, the tension adjustment mechanism 13 maintains consistent tension in the weft yarn 4 by applying additional tension to the weft yarn 4, thereby improving the weaving quality and promoting stable machine operation.

[0052] In this embodiment, the reed divider 2 is placed between the yarn frame 1 and the weft laying trolley 3. The reed divider 21 inside the reed divider 2 serves to fix the weft yarn 4 and prevent the weft yarn 4 from getting tangled and knotted when it is unwound.

[0053] For details, please refer to Figure 1 and Figure 2 The tension adjustment mechanism 13 includes a mounting base 131 fixed on the yarn frame 1, a spindle 132 mounted on the mounting base 131, a tension disc 133 and a tension washer 134 movably mounted on the spindle 132 from bottom to top, and a guide roller 135 mounted on the mounting base 131 and located on one side of the spindle 132. When the weft yarn 4 is introduced into the tension adjustment mechanism 13, the weft yarn 4 is led out after passing through the tension disc 133, around the spindle 132, and around the guide roller 135.

[0054] In this embodiment, the tension adjustment mechanism 13 is a disc-type tension adjustment mechanism. When the weft yarn 4 is unwound axially, the absolute value of the tension of the weft yarn 4 is very small. Such a tension level can easily cause problems such as yarn breakage. Using the disc-type tension adjustment mechanism of this application can appropriately increase the tension of the weft yarn 4 and improve product quality. Its working principle is to use friction braking on the yarn to obtain the necessary tension. The disc-type tension adjustment mechanism is not only simple in structure, but also easy to adjust to meet the requirements of different yarn numbers.

[0055] In this embodiment, the tension adjusting mechanism 13 increases the tension of the weft yarn 4 through friction, thereby adjusting the tension during the weft yarn 4 conveying process. In this embodiment, the tension adjusting mechanism 13 is a disc-type tension adjusting mechanism. Furthermore, the disc-type tension adjusting mechanism used in this embodiment has many forms. Based on the different ways the yarn passes through the friction surface, it can be divided into two main categories: accumulation method and multiplication method. Based on the normal pressure applied to the yarn, it can be divided into several types such as washer pressure, spring pressure, air pressure, and electromagnetic pressure. This embodiment uses the washer pressure method.

[0056] In this embodiment, the tension disc 133 includes an upper tension disc and a lower tension disc, and the weft yarn 4 passes between the upper tension disc and the lower tension disc.

[0057] Further, please refer to Figure 1 and Figure 2 The tension adjustment mechanism 13 also includes a buffer felt block 136 that is movably sleeved on the spindle 132 and located between the tension disc 133 and the tension washer 134, for buffering the jumping generated by the tension washer 134 and reducing the tension fluctuation rate.

[0058] In this embodiment, the tension plate 133 obtains pressure through the weight of the tension washer 134 on the buffer felt block 136.

[0059] Alternatively, the yarn tension can be adjusted by changing the weight of the tension washer 134.

[0060] Optionally, the tension adjusting mechanism 13 in this embodiment can also be a ring-type tension adjusting mechanism, in which an alumina ring (or steel ring) is hung on the running yarn. The yarn gains a certain tension due to the weight of the ring and the friction between the yarn and the ring, and between the yarn and the fixed alumina rod. The ring-type tension adjusting mechanism has a certain compensating effect on tension fluctuations. When the tension is too low, the yarn contacts the fixed rod due to the weight of the ring, increasing the friction on the yarn and thus increasing the tension. When the tension is too high, the yarn picks up the ring, the contact angle between the yarn and the rod decreases, or the yarn disengages from the rod, thus decreasing the tension.

[0061] To go further, please see Figure 3 The reed 21 has multiple sets of long holes 211 evenly spaced inside, and a set of sealing reed holes 212 is set in the middle between every two sets of long holes 211. The weft yarn 4 passes through the long holes 211 and the sealing reed holes 212 in sequence. When the reed 21 moves up and down inside the reed frame 2, the weft yarn 4 in the long holes 211 will not be moved, while the weft yarn 4 in the sealing reed holes 212 moves with the reed 21, thereby realizing the splitting and ensuring that the yarn is arranged in an orderly manner.

[0062] In this embodiment, the long eyelet 211 is made of ceramic, which enhances the wear resistance of the reed 21 and improves its service life.

[0063] In this embodiment, the sealing reed eye 212 is set between every two sets of elongated eyelets 211 by welding.

[0064] Specifically, please refer to Figure 1 The yarn frame 1 includes two sets of longitudinal beams 14 and two sets of transverse beams 15 arranged opposite to each other, with the longitudinal beams 14 and transverse beams 15 perpendicular to each other; multiple sets of bobbin frames 11 are rotatably connected to the longitudinal beams 14 through a rotating shaft 111, and the multiple sets of bobbin frames 11 are evenly spaced along the direction of the longitudinal beams 14; multiple sets of tension adjustment mechanisms 13 are installed on the transverse beams 15 on one side close to the reed frame 2, and the multiple sets of tension adjustment mechanisms 13 are evenly spaced along the direction of the transverse beams 15.

[0065] In this embodiment, the two ends of the rotating shaft 111 are rotatably connected to the longitudinal beam 14 through bearings.

[0066] For more details, please refer to Figure 1 The transmission mechanism 12 includes a worm shaft 121 arranged along the longitudinal beam 14, multiple sets of worms 122 sleeved on the worm shaft 121, and multiple sets of worm wheels 123 sleeved on the rotating shaft 111 and meshing with the multiple sets of worms 122; wherein each set of cylinder frame 11 corresponds to one set of worms 122 and one set of worm wheels 123. Please refer to Figure 4 The worm gear 123 includes an inner ring 1231 fixedly sleeved on the rotating shaft 111, an outer ring 1232 rotatably sleeved on the outside of the inner ring 1231 via a number of balls, a support head 1233 with its first end hinged to one side of the inner ring 1231, and a compression spring 1234 with its first end connected to one side of the inner ring 1231 and its second end connected to the middle of the support head 1233; wherein, the outer ring 1232 has teeth 12321 on its outer side that mesh with the worm 122, and ratchet teeth 12322 in the middle of the outer ring 1232 that are drivenly connected to the second end of the support head 1233.

[0067] In this embodiment of the application, the worm shaft 121 is driven to operate by its own drive motor.

[0068] In this embodiment, in view of the current situation where rectangular segmented rotary cylinder frames rely on manual flipping one by one, this embodiment achieves the coexistence of collective flipping and individual flipping modes of cylinder frames 11 through the unique structural design of the worm gear 123 in the transmission mechanism 12. This achieves automation and improves work efficiency while maintaining the flexibility of use.

[0069] In this embodiment, when the cylinder frame 11 needs to be rotated collectively, the built-in motor drives the worm shaft 121 along... Figure 1 Rotating in the direction of the arrow shown, a transmission route is formed: motor → worm shaft 121 → worm 122 → outer ring 1232 of worm wheel 123 → support head 1233 of worm wheel 123 → inner ring 1231 of worm wheel 123 → rotating shaft 111 of cylinder frame 11. The inner ring 1231 of worm wheel 123 carries the rotating shaft 111 of cylinder frame 11 according to... Figure 4 Rotate in the direction indicated by the middle arrow. When it is necessary to individually rotate a specific tube frame 11, do so manually according to... Figure 1 Rotate the cylinder frame 11 in the direction indicated by the middle arrow, and the shaft 111 of the cylinder frame 11 will rotate accordingly. Since the inner ring 1231 of the worm gear 123, together with the support head 1233 on it, rotates along the ratchet 12322 at this time, it will slide over each ratchet 12322, so the worm gear 123 and the worm 122 remain engaged and stationary.

[0070] Next, the working principle of the weft feeding device applied to the full-width weft-inserting warp knitting machine involved in the embodiments of this application will be explained.

[0071] The weft yarn 4 is first unwound from the bobbin holder 11 on the yarn frame 1. During the unwinding process, the unwinding tension of the weft yarn 4 changes continuously due to the change in the unwinding radius of the bobbin. Especially when unwinding to the bottom of the bobbin, the tension of the weft yarn 4 is very different from that at the beginning of unwinding. This causes uneven tension during weft laying, resulting in phenomena such as weft yarn 4 accumulation on the fabric surface, which seriously affects the fabric surface quality. Therefore, a tension adjustment mechanism 13 is provided on the yarn frame 1 to compensate for the problem of uneven tension changes caused by unwinding, effectively reducing the fluctuation of the weft yarn 4 tension. Therefore, after unwinding, the weft yarn 4 passes through the tension adjustment mechanism 13, that is, it first enters the tension plate 133, then passes around the mandrel 132, exits the tension plate 133, passes around the guide roller 135, and is then led to the splitting reed 21. In the splitting reed 21, the weft yarn 4 passes through the long eyelet 211 and the sealing eyelet 212 in sequence to achieve splitting, and then passes into the weft laying carriage 3, which is driven by the weft laying carriage 3 to lay the weft.

[0072] In summary, this application, through the combined use of the yarn frame, tension adjustment mechanism, and reed divider, achieves the adjustment of the tension of the weft yarn in a full-width weft-inserted warp knitting machine, making the weaving process more stable and smooth, and further improving the overall weaving quality of the product. In addition, in view of the current situation where rectangular segmented rotating bobbins rely on manual individual flipping, this application, through the unique structural design of the worm gear in the transmission mechanism, realizes the coexistence of collective flipping and individual flipping of the bobbins, achieving automation and improving work efficiency while maintaining the flexibility of use.

[0073] In the embodiments disclosed in this application, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this invention according to the specific circumstances.

[0074] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A weft feeding device for use in a full-width laid-in warp knitting machine, characterized in that, It includes a yarn frame, a weft-laying trolley located on one side of the yarn frame, and a reed divider located between the yarn frame and the weft-laying trolley; Multiple sets of bobbin frames are rotatably connected inside the yarn frame. The multiple sets of bobbin frames can coexist in a collective flipping mode or an individual flipping mode through a transmission mechanism. Multiple sets of tension adjustment mechanisms are installed on the side of the yarn frame close to the reed divider frame. Each set of bobbin frames corresponds to one set of tension adjustment mechanisms. The reed divider frame is equipped with a reed that can move up and down. The yarn frame includes two sets of longitudinal beams and two sets of transverse beams arranged opposite each other. The longitudinal beams and transverse beams are perpendicular to each other. Each set of yarn bobbins is rotatably connected to the longitudinal beams through a pivot. The multiple sets of yarn bobbins are evenly spaced along the direction of the longitudinal beams. Multiple sets of tension adjustment mechanisms are installed on the transverse beams on one side close to the reed frame. The multiple sets of tension adjustment mechanisms are evenly spaced along the direction of the transverse beams. The transmission mechanism includes a worm shaft arranged along the direction of the longitudinal beam, multiple sets of worms sleeved on the worm shaft, and multiple sets of worm wheels sleeved on the rotating shaft and meshing with the multiple sets of worms. Each set of cylinder frames corresponds to a set of worms and a set of worm wheels. The worm gear includes an inner ring fixedly sleeved on the rotating shaft, an outer ring rotatably sleeved on the outside of the inner ring via a plurality of balls, a support head with its first end hinged to one side of the inner ring, and a compression spring with its first end connected to one side of the inner ring and its second end connected to the middle of the support head. The outer ring has teeth on its outer side that mesh with the worm, and the middle of the outer ring has ratchet teeth that are drively connected to the second end of the support head. When the transmission mechanism drives multiple sets of bobbin frames to rotate, the weft yarn on the bobbin frames passes sequentially through the tension adjustment mechanism and the reed divider, and is then laid into the conveyor chain by the weft laying trolley, and then conveyed to the weaving area by the conveyor chain for weaving.

2. The weft feeding device for a full-width laid-in warp knitting machine according to claim 1, characterized in that, The tension adjustment mechanism includes: A mounting base fixed to the yarn frame; a mandrel mounted on the mounting base; From bottom to top, a tension disc and a tension washer are movably fitted onto the mandrel; and a guide roller is mounted on the mounting base and located on one side of the mandrel; When the weft yarn is introduced into the tension adjustment mechanism, the weft yarn is drawn out after passing through the tension disc, around the mandrel, and around the guide roller.

3. The weft feeding device for a full-width weft-inserting warp knitting machine according to claim 2, characterized in that, The tension adjustment mechanism also includes a buffer felt block that is movably sleeved on the mandrel and located between the tension disc and the tension washer, for buffering the jumping of the tension washer and reducing the tension fluctuation rate.

4. The weft feeding device for a full-width weft-inserting warp knitting machine according to claim 1, characterized in that, The reed is evenly spaced with multiple sets of long holes, and a sealing reed eye is provided in the middle between every two sets of long holes. The weft yarn passes through the long holes and the sealing reed eye in sequence. When the splitting reed moves up and down within the splitting reed frame, the weft yarn in the long hole will not be moved, while the weft yarn in the sealing reed hole moves with the splitting reed, thereby achieving splitting.

5. The weft feeding device for a full-width weft-inserting warp knitting machine according to claim 4, characterized in that, The material of the elongated hole is ceramic.

6. The weft feeding device for a full-width weft-inserting warp knitting machine according to claim 1, characterized in that, The worm shaft is driven by its own drive motor.

7. A full-width weft-inserting warp knitting machine, characterized in that, Includes the weft feeding device applied to a full-width weft-inserted warp knitting machine as described in any one of claims 1 to 6.

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