Warp knitting machine with two needle beds

Abstract

The invention relates to the related field of two-needle bar warp knitting machines, in particular to a two-needle bar warp knitting machine which comprises a machine body, a yarn bobbin assembly, a guide bar assembly, a two-needle bar, a dynamic guide assembly and the like. The dynamic guide assembly is arranged, the movable frame drives the guide cylinder to horizontally move to be matched with the unloading point position of yarn on the yarn cylinder assembly, the position of the guide cylinder in the front-back direction is adjusted through the electric push rod to adapt to the residual amount of the yarn of the yarn cylinder assembly, and therefore the yarn can vertically and stably enter the guide cylinder; and then the yarn is guided into the guide bar assembly through the guide cylinder, so that the flexibility and the accuracy of yarn conveying are improved, the friction force generated by large bending of the yarn is reduced, the tension of the yarn is more stable, the situation of yarn breakage is reduced, and the quality of fabrics is improved.

Description

Technical Field

[0001] The invention relates to the field related to double needle bed warp knitting machines, in particular to a double needle bed warp knitting machine. Background Art

[0002] Warp knitting machines are textile machines used to produce warp knitted fabrics. According to structural characteristics such as the number of needle beds, they can be divided into different types, such as single-needle-bed warp knitting machines and double-needle-bed warp knitting machines. Double-needle-bed warp knitting machines have two relatively arranged needle beds (i.e., an upper needle bed and a lower needle bed), each of which is equipped with one or more rows of knitting needles. This machine can weave on the upper and lower needle beds at the same time, thereby producing fabrics with more complex structures and more diverse functions. High-speed double-needle-bed warp knitting machines are widely loved by people because of their higher production efficiency, and the fabrics they produce have a smoother surface, a more uniform texture, and more guaranteed quality.

[0003] The existing patent number is: CN218232744U discloses an automatic yarn feeding device for a warp knitting machine. Through the coordination of a yarn feeding arm, a fixing seat, a mounting plate, a mounting hole, a fixing frame, a yarn feeding nozzle, a fixing mechanism, a protective ring, a guide frame, a guide assembly and a tension adjustment assembly, the device can be installed on the surface of the warp knitting machine by using the mounting plate and the mounting hole, the yarn can be guided by using the guide assembly, and the tension of the yarn can be adjusted by using the tension adjustment assembly, so that the yarn can be prevented from being too tight or too loose, and the yarn breakage can be avoided, thereby ensuring the weaving effect of the warp knitting machine; And the patent number: CN217869376U discloses a guide device for the warp feeding mechanism of a warp knitting machine. By utilizing the mutual cooperation of guide rollers, guide rings, fixed rings and positioning blocks, the yarn is located between four adjacent fixed rings, and the yarn moves on the outer wall of the guide ring, which is beneficial to separately position multiple groups of yarns and prevent multiple groups of yarns from being mixed.

[0004] The two existing patents both have the following problems: 1. During the unloading process of the yarn from the yarn bobbin on the warp knitting machine, the yarn bobbin rotates continuously, and the unloading point of the yarn moves continuously, while the position of the yarn guide is fixed. The yarn has a relatively fixed direction when unloaded at different positions, which may easily cause the yarn to form a large bending angle or friction path when passing through the guiding device, thereby causing the yarn tension to fluctuate. For example, when the yarn is unloaded from the left or right side of the yarn bobbin, the tension may increase due to the relatively tortuous direction. Unstable tension may cause the yarn to break and affect the quality of the fabric; 2. Lack of yarn lubrication. The yarn is prone to generate large friction when passing through the guide point and the comb, and its running speed is relatively fast, which may easily cause the yarn to wear more severely, resulting in a decrease in yarn strength, which may reduce the quality of the fabric. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a double needle bed warp knitting machine to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a double needle bed warp knitting machine, comprising a machine body, a yarn bobbin assembly, a comb assembly and a double needle bed arranged on the machine body, and also comprising a dynamic guide assembly arranged on the machine body for dynamically guiding the yarn, the dynamic guide assembly comprising a guide frame installed on the machine body and located between the yarn bobbin assembly and the comb assembly, and a movable frame slidably installed in the guide frame; A driving assembly for providing driving force for horizontal movement of the movable frame is provided in the guide frame; A first motor is arranged in the movable frame, and a support assembly for supporting the first motor is arranged in the movable frame, a rotating frame is installed on the output shaft of the first motor, a second motor is fixedly arranged on the side surface of the rotating frame, and a guide cylinder is installed on the second motor; The guide cylinder includes a cylinder body connected to the output shaft of the second motor, an annular boss arranged at the bottom of the inner side of the cylinder body, and a lubricant introduction pipe embedded in the top of the inner side of the cylinder body. An annular groove is opened along the inner circle of the annular boss, a rubber ring is embedded in the annular groove, a silicone ring is arranged on the inner circle of the rubber ring, a plurality of pressure sensors equidistantly distributed in an annular shape are arranged between the inner circle of the rubber ring and the outer surface of the silicone ring, a plurality of annular convex bodies are arranged on the inner circle of the silicone ring, and a plurality of fine nozzles are installed along the inner circle of the lubricant introduction pipe; The supporting assembly comprises a supporting plate which is slidably mounted in the movable frame and connected to the first motor, and an electric push rod which is fixed in the movable frame, wherein the piston rod of the electric push rod is connected to the supporting plate.

[0007] Preferably, the driving assembly includes a guide rack fixed in the guide frame and slidably connected to the inner side of the movable frame, a third motor installed in the movable frame, and a gear rotatably connected to the inner side of the movable frame is sleeved on the output shaft of the third motor, and the gear is meshed with the rack.

[0008] Preferably, a positioning assembly is further provided in the guide frame, and the positioning assembly includes a scale grating installed at the inner bottom of the guide frame and a reading head embedded in the bottom end surface of the movable frame, and the reading head cooperates with the scale grating.

[0009] Preferably, a plurality of springs are installed along the circumferential outer surface of the rubber ring, the plurality of springs are distributed in a ring shape with equal intervals, and the outer surface of the rubber ring is connected to the inner side of the annular groove through the springs.

[0010] Preferably, the vertical cross-section of the annular convex body is arc-shaped and wavy, and the inner side of the annular convex body protrudes from the inner circle of the annular boss.

[0011] Preferably, the top end surface of the annular boss is provided with a plurality of discharge channels, and the discharge channels penetrate the bottom end surface of the cylinder.

[0012] Preferably, an annular collecting groove is provided at the inner bottom of the silicone ring, and the collecting groove is connected to the inner side of the discharge channel through a discharge hose.

[0013] Preferably, the micro-nozzle is located directly above the annular boss, and the projection of the annular surface of the annular boss in the vertical upward direction can completely cover the injection end of the micro-nozzle.

[0014] Preferably, a distance is provided between the rear end surface of the cylinder and the front end surface of the movable frame.

[0015] Preferably, a fixing frame is installed on the inner side of the cylinder, and a plurality of guide rollers distributed in an annular shape with equal intervals are rotatably installed inside the fixing frame. The guide rollers are located between the annular boss and the upper and lower opposite surfaces of the micro-nozzle, and the injection end of the micro-nozzle, the inner side of the guide roller and the inner circle of the annular boss are distributed in a step shape.

[0016] Beneficial effects of the present invention: The present invention provides a dynamic guiding assembly, and drives the guiding cylinder to move horizontally through a movable frame to match the position of the unloading point of the yarn on the yarn bobbin assembly, and adjusts the position of the guiding cylinder in the front-to-back direction through an electric push rod to adapt to the residual amount of yarn in the yarn bobbin assembly, so that the yarn can vertically and smoothly enter the guiding cylinder, and then the yarn is guided to the comb assembly through the guiding cylinder. This not only improves the flexibility and accuracy of yarn transportation, but also reduces the friction force generated by the large twists and turns of the yarn, so that the tension of the yarn is more stable, which is beneficial to reducing the situation of yarn breakage, thereby facilitating improving the quality of the fabric.

[0017] The lubricant sprayed through the micro-nozzle can lubricate the yarn, reduce the friction between the yarn and the comb assembly, help reduce yarn breakage, ensure the flatness and consistency of the fabric surface, and thus improve the quality of the final product.

[0018] The silicone ring and the wavy protrusion are helpful to scrape off the excess lubricant on the yarn, which helps to prevent excessive lubricant from polluting the environment.

[0019] By setting up a plurality of pressure sensors distributed in a ring shape, the deviation direction of the yarn during conveying is detected, and then the angle of the guide cylinder is adjusted according to the first motor and the second motor to adapt to the yarn, ensuring that the yarn is always on the optimal path, avoiding the entanglement problem of the yarn caused by deviation, reducing the friction between the yarn and the guide cylinder, reducing the yarn wear, and helping to improve the integrity of the yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the double needle bed warp knitting machine of the present invention; Figure 2is a schematic diagram of a top-view cross-sectional structure of a dynamic guide assembly of the present invention; Figure 3 It is a schematic diagram of the front cross-sectional structure of the cylinder of the present invention; Figure 4 This is a schematic diagram of the top view distribution structure of the guide rollers of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the cylinder of the present invention; Figure 6 is a schematic diagram of the top view distribution structure of the pressure sensor of the present invention; Figure 7 It is a schematic diagram of the cylinder connection structure of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the silicone ring of the present invention; Fig. 9 It is a schematic diagram of the cylinder motion trajectory structure of the present invention.

[0021] Among them: body-1, yarn bobbin assembly-2, comb assembly-3, double needle bed-4, dynamic guide assembly-5, guide frame-51, movable frame-52, first motor-53, rotating frame-54, second motor-55, guide cylinder-56, third motor-57, gear-58, guide rack-59, cylinder-561, annular boss-562, annular groove-563, rubber ring-564, silicone ring-565, pressure sensor-566, spring-567, lubricant inlet tube-568, fine nozzle-569, fixed frame-5610, guide roller-5611, annular convex body-56a, collecting groove-56b, discharge hose-56c, discharge channel-56d, positioning assembly-6, scale grating-61, reading head-62, support assembly-7, support plate-71, electric push rod-72. DETAILED DESCRIPTION

[0022] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0023] like Figure 1 As shown, the present invention provides a double needle bed warp knitting machine, comprising a machine body 1, a yarn bobbin assembly 2, a comb assembly 3 and a double needle bed 4 arranged on the machine body 1, the yarn bobbin assembly 2 is connected by a yarn bobbin and a driving component assembly for driving the yarn bobbin to rotate, and the double needle bed warp knitting machine is formed by combining the machine body 1, the yarn bobbin assembly 2, the comb assembly 3 and the double needle bed 4; like Figures 2 to 9As shown, the present embodiment also includes a dynamic guide assembly 5 arranged on the machine body 1 for dynamically guiding the yarn, the dynamic guide assembly 5 includes a guide frame 51 installed on the front end surface of the machine body 1 and located between the yarn bobbin assembly 2 and the comb assembly 3, and a movable frame 52 slidably installed in the guide frame 51, and the movable frame 52 can move horizontally in the left and right directions along the inner side of the guide frame 51; A driving assembly for providing driving force for the horizontal movement of the movable frame 52 is provided in the guide frame 51; A first motor 53 is arranged in the movable frame 52, and a support assembly 7 for supporting the first motor 53 is arranged in the movable frame 52. A rotating frame 54 is installed on the output shaft of the first motor 53. A second motor 55 is locked and fixed at the left and right ends of the rotating frame 54, and each second motor 55 is installed with a guide cylinder 56 for guiding the conveying yarn. The guide cylinder 56 comprises a cylinder body 561 connected to the output shaft of the second motor 55, an annular boss 562 is connected to the inner bottom of the cylinder body 561 in an integrated structure, a lubricant introduction pipe 568 is fixedly embedded in the inner top of the cylinder body 561, an annular groove 563 is provided along the inner circle of the annular boss 562, a rubber ring 564 is movably embedded in the annular groove 563, and a silicone ring 565 is provided on the inner circle of the rubber ring 564; A plurality of pressure sensors 566 are arranged between the inner ring of the rubber ring 564 and the outer surface of the silicone ring 565. In this embodiment, the pressure sensor 566 adopts a precise silicon piezoresistive MEMS pressure sensor for accurately detecting the deviation direction of the yarn. The inner ring of the silicone ring 565 is provided with a plurality of annular convex bodies 56a arranged at equal intervals. A plurality of fine nozzles 569 are installed along the inner ring of the lubricant introduction tube 568. The micro nozzle 569 uses an ultrasonic nozzle to generate fine lubricant, so as to spray the lubricant onto the yarn more accurately; The support assembly 7 includes a support plate 71 slidably mounted in the movable frame 52 and connected to the first motor 53, and an electric push rod 72 fixed in the movable frame 52. The piston rod of the electric push rod 72 is connected to the support plate 71, so that the electric push rod 72 can be controlled to drive the support plate 71 to move in the front-rear direction in the movable frame 52, thereby adjusting the position of the guide tube 56 in the front-rear direction. The vertical cross section of the annular protrusion 56a is arc-shaped and wavy, and the inner side of the annular protrusion 56a protrudes from the inner circle of the annular boss 562. The arc-shaped and wavy protrusion 56a can increase the contact area between the yarn and the scraper surface, thereby scraping off excess lubricant more effectively. The fine nozzle 569 is located directly above the annular boss 562, and the projection of the annular surface of the annular boss 562 in the vertical upward direction can completely cover the injection end of the fine nozzle 569, thereby reducing the collision and friction between the yarn and the fine nozzle 569 during transportation; There is a gap between the rear end surface of the cylinder 561 and the front end surface of the movable frame 52 to reduce the collision between the cylinder 561 and the movable frame 52 during rotation. In this embodiment, the driving assembly includes a guide rack 59 fixedly mounted in the guide frame 51 and slidably connected to the inner side of the movable frame 52, and a third motor 57 mounted in the movable frame 52. The output shaft of the third motor 57 is sleeved with a gear 58 rotatably connected to the inner side of the movable frame 52. The gear 58 is meshed with the rack 59. The gear 58 cooperates with the rack 59 to drive the movable frame 52 to move horizontally along the guide frame 51. In this embodiment, a positioning assembly 6 is further provided in the guide frame 51. The positioning assembly 6 includes a scale grating 61 installed at the inner bottom of the guide frame 51 and a reading head 62 fixedly embedded in the bottom end surface of the movable frame 52. The reading head 62 cooperates with the scale grating 61 to more accurately detect the position of the movable frame 52 through the scale grating 61 and the reading head 62, so as to more accurately control the movable frame 52 to adjust the position of the cylinder 561, so that the cylinder 561 accurately matches the unloading position of the yarn. In this embodiment, a plurality of springs 567 are installed along the outer circumferential surface of the rubber ring 564. The plurality of springs 567 are distributed in an annular shape at equal intervals, and the outer surface of the rubber ring 564 is connected to the inner side of the annular groove 563 through the springs 567. When the yarn applies excessive pressure to the rubber ring 564, the springs 567 contract to reduce the damage of the yarn due to excessive friction. In this embodiment, a plurality of discharge channels 56d are provided on the top surface of the annular boss 562, and the discharge channels 56d pass through the bottom surface of the cylinder 561. The bottom of the discharge channels 56d is connected to an external negative pressure component through a pipeline, so that the lubricant on the annular boss 562 can be discharged through the negative pressure component and the discharge channels 56d. In this embodiment, an annular collecting groove 56b is provided at the inner bottom of the silicone ring 565, and the collecting groove 56b is connected to the inner side of the discharge channel 56d through a discharge hose 56c, so that the lubricant in the silicone ring 565 can be discharged through the collecting groove 56b and the discharge hose 56c. In this embodiment, a fixing frame 5610 is installed on the inner side of the cylinder 561, and a plurality of guide rollers 5611 are rotatably installed in the fixing frame 5610 and are distributed in an annular shape at equal intervals. The guide rollers 5611 are located between the annular boss 562 and the upper and lower opposite surfaces of the fine nozzle 569, and the injection end of the fine nozzle 569, the inner side of the guide roller 5611 and the inner circle of the annular boss 562 are distributed in a step-like manner, so that the yarn is easily guided by the guide roller 5611 when it deviates, thereby reducing the collision and friction between the yarn and the fine nozzle 569 when it deviates; Specifically, the lubricant introduction tube 568 is connected to an external lubricant input device, and the electrical equipment in the warp knitting machine is connected to an external programmable control device. The programmable control device is used to program and control each electrical equipment, and the yarn on the yarn bobbin assembly 2 is guided through the barrel 561 and the comb assembly 3. The knitting needles of the front needle bed and the rear needle bed of the double needle bed 4 move up and down respectively under the action of the driving mechanism, and a series of actions such as needle rising, yarn padding, closing, looping, and looping are completed in sequence. The comb assembly 3 quickly and accurately pads the yarn into the needle hook of the knitting needle on the corresponding needle bed. As the knitting needles continuously repeat the above actions, the yarns are gradually interwoven to form coils, and many coils are mutually intertwined to finally form a warp knitted fabric; The yarn is lubricated by the lubricant sprayed from the fine nozzle 569 while in the cylinder 561, and the excess lubricant on the yarn is scraped off by friction with the protrusion 56a on the silicone ring 565; And control the third motor 57 to drive the gear 58 to rotate, the output shaft of the third motor 57 rotates at a speed to match the rotation speed of the output end of the driving member in the yarn tube assembly 2, the gear 58 cooperates with the guide rack 59 to drive the movable frame 52 to move horizontally along the guide frame 51, and the movable frame 52 drives the cylinder 561 to move horizontally to adapt to the unloading point position of the yarn on the yarn tube assembly 2. For example, when the unloading point of the yarn on the yarn tube assembly 2 is on the left, the cylinder 561 moves to the left, and when the unloading point of the yarn is on the right, the cylinder 561 moves to the right, and the third motor 57 is controlled. The rotation speed makes the moving position of the cylinder 561 correspond to the unloading point of the yarn, so that the yarn can always pass through the cylinder 561 vertically, and when the bottom of the cylinder 561 is bent, it can form a certain friction with the silicone ring 565 to scrape off the excess lubricant on the yarn. At the same time, the front and rear position of the cylinder 561 is adjusted according to the residual amount of yarn on the yarn cylinder assembly 2. If the amount of yarn is large, the piston rod of the electric push rod 72 is in an extended state, and when the amount of yarn is small, the piston rod of the electric push rod 72 is in a retracted state, so that the yarn can better pass through the cylinder 561 vertically; When the yarn at the bottom of the cylinder 561 is too bent, it generates greater pressure on the corresponding position of the silicone ring 565. The pressure in this direction is detected by the corresponding pressure sensor 566. At this time, the angle of the cylinder 561 can be adjusted by controlling the first motor 53 and the second motor 55. The first motor 53 can drive the rotating frame 54 to rotate left and right, thereby adjusting the left and right angle of the cylinder 561, and the second motor 55 can adjust the front and back angle of the cylinder 561. By adjusting the angle of the cylinder 561, the angle of the cylinder 561 can be better adapted to the conveying path of the yarn, thereby improving the stability of the yarn conveying on the double needle bed warp knitting machine, which is beneficial to improving the stability of the double needle bed warp knitting machine during operation.

[0024] The present invention provides a double-needle bed warp knitting machine, which is provided with a dynamic guide assembly 5, and a movable frame 52 drives a guide cylinder 56 to move horizontally to match the unloading point position of the yarn on the yarn tube assembly 2, and an electric push rod 72 is used to adjust the front and rear direction of the guide cylinder 56 to adapt to the residual amount of yarn on the yarn tube assembly 2, so that the yarn can vertically and smoothly enter the guide cylinder, and then the yarn is guided to the comb assembly 3 by the guide cylinder. This not only improves the flexibility and accuracy of yarn transportation, but also reduces the friction force generated by the large twists and turns of the yarn, so that the tension of the yarn is more stable, which is beneficial to reducing the situation of yarn breakage, thereby facilitating improving the quality of the fabric.

[0025] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double needle bed warp knitting machine, comprising a machine body, a yarn bobbin assembly arranged on the machine body, a comb assembly and a double needle bed; Features: It also includes a dynamic guide assembly arranged on the machine body for dynamically guiding the yarn, wherein the dynamic guide assembly includes a guide frame installed on the machine body and located between the yarn bobbin assembly and the comb assembly, and a movable frame slidably installed in the guide frame; A driving assembly for providing driving force for horizontal movement of the movable frame is provided in the guide frame; A first motor is arranged in the movable frame, and a support assembly for supporting the first motor is arranged in the movable frame, a rotating frame is installed on the output shaft of the first motor, a second motor is fixedly arranged on the side surface of the rotating frame, and a guide cylinder is installed on the second motor; The guide cylinder includes a cylinder body connected to the output shaft of the second motor, an annular boss arranged at the bottom of the inner side of the cylinder body, and a lubricant introduction pipe embedded in the top of the inner side of the cylinder body. An annular groove is opened along the inner circle of the annular boss, a rubber ring is embedded in the annular groove, a silicone ring is arranged on the inner circle of the rubber ring, a plurality of pressure sensors equidistantly distributed in an annular shape are arranged between the inner circle of the rubber ring and the outer surface of the silicone ring, a plurality of annular convex bodies are arranged on the inner circle of the silicone ring, and a plurality of fine nozzles are installed along the inner circle of the lubricant introduction pipe; The supporting assembly comprises a supporting plate which is slidably mounted in the movable frame and connected to the first motor, and an electric push rod which is fixed in the movable frame, wherein the piston rod of the electric push rod is connected to the supporting plate.

2. A double needle bed warp knitting machine according to claim 1, characterized in that: The driving assembly includes a guide rack fixed in the guide frame and slidably connected to the inner side of the movable frame, a third motor installed in the movable frame, and a gear rotatably connected to the inner side of the movable frame is sleeved on the output shaft of the third motor, and the gear is meshed with the rack.

3. A double needle bed warp knitting machine according to claim 1, characterized in that: A positioning assembly is also arranged in the guide frame, and the positioning assembly comprises a scale grating installed at the inner bottom of the guide frame and a reading head embedded in the bottom end surface of the movable frame, and the reading head and the scale grating cooperate with each other.

4. A double needle bed warp knitting machine according to claim 1, characterized in that: A plurality of springs are installed along the circumferential outer surface of the rubber ring. The plurality of springs are distributed in a ring shape with equal spacing, and the outer surface of the rubber ring is connected to the inner side of the annular groove through the springs.

5. The double needle bed warp knitting machine according to claim 1, characterized in that: The vertical cross section of the annular convex body is arc-shaped and wavy, and the inner side of the annular convex body protrudes from the inner circle of the annular boss.

6. The double needle bed warp knitting machine according to claim 1, characterized in that: The top end surface of the annular boss is provided with a plurality of discharge channels, and the discharge channels penetrate the bottom end surface of the cylinder.

7. A double needle bed warp knitting machine according to claim 6, characterized in that: An annular collecting groove is provided at the inner bottom of the silicone ring, and the collecting groove is connected with the inner side of the discharge channel through a discharge hose.

8. The double needle bed warp knitting machine according to claim 1, characterized in that: The micro nozzle is located directly above the annular boss, and the projection of the annular surface of the annular boss in the vertical upward direction can completely cover the injection end of the micro nozzle.

9. The double needle bed warp knitting machine according to claim 1, characterized in that: A distance is arranged between the rear end surface of the cylinder and the front end surface of the movable frame.

10. The double needle bed warp knitting machine according to claim 1, characterized in that: A fixing frame is installed on the inner side of the cylinder, and a plurality of guide rollers distributed in an annular shape with equal spacing are rotatably installed in the fixing frame. The guide rollers are located between the annular boss and the upper and lower opposite surfaces of the micro nozzle, and the injection end of the micro nozzle, the inner side of the guide roller and the inner circle of the annular boss are distributed in a step shape.

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