Needle latch opening method of upper and lower jacquard thread adjusting machine
By introducing a dedicated loop-removal step and a needle latch opener into the upper and lower jacquard yarn adjusting machine, the problems of knitting complexity and stability caused by the lack of independent needle latch control in the existing technology are solved, achieving efficient and stable knitting results and improved equipment adaptability.
Patent Information
- Application Number
- CN202511390931.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-11-07
AI Technical Summary
The existing jacquard yarn adjusting machine lacks an independent path for needle opening control, which increases the complexity of knitting, causes mechanical interference and timing asynchrony, affects knitting quality and equipment stability, especially in high-density or special weave structures, it is difficult to ensure that the needle opening of each needle is accurate.
It employs a specialized loop release procedure and an independent needle latch opener, which precisely controls the movement of the knitting needles through the loop release triangle. The needle latch is opened immediately at the needle gate after loop release, ensuring that the needle latch is in the open state before the next knitting cycle. Precise control is achieved by combining mechanical linkage or electronic control system.
It improves the stability and reliability of the weaving process, ensures uniform fabric structure, enhances the adaptability and flexibility of the equipment, reduces mechanical wear and noise, and improves product quality and weaving efficiency.
Smart Images
Figure CN120905856A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of circular knitting machines, in particular to a needle opening method of an up-and-down jacquard thread regulator. BACKGROUND
[0002] As an important type of circular knitting machines, the up-and-down jacquard thread regulator is widely used in the textile industry for fabric production with complex patterns and high precision requirements. Through the coordinated action of multi-thread regulation and jacquard mechanism, this type of equipment realizes the knitting of various colors and organizational structures, and plays an important role in special process effects such as starting holes and legs.
[0003] In actual production, the control of the needle tongue has always been a key link affecting the knitting efficiency and quality. If the needle tongue cannot be opened in time and accurately, it will directly lead to knitting defects such as missing stitches, wrong patterns, and broken yarns, seriously affecting the fabric quality and equipment operation stability.
[0004] The existing needle tongue opening process is usually completed in multiple knitting processes, lacking independent and dedicated control paths. On the one hand, this increases the complexity of the knitting program, and on the other hand, it leads to inconsistent openings due to mechanical interference or asynchronous timing, affecting the uniformity of the leg or hole effect. Especially when dealing with high density or special organizational structures, the existing method cannot guarantee that the needle tongue of each needle can be opened accurately at the required time, limiting the functional expansion and process adaptability of the equipment. SUMMARY
[0005] The purpose of the present application is to solve the above-mentioned shortcomings in the prior art and provide a needle tongue opening method for an up-and-down jacquard thread regulator.
[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a needle tongue opening method for an up-and-down jacquard thread regulator, comprising the following steps: S1. Perform a loop lifting operation in one of the last two paths to form a hole or loop lifting structure in the fabric; S2. In the loop lifting step, the needles perform ascending and descending movements under the control of the cam to complete the loop lifting action; S3. Position the needle tongue opener at the independent path of the needle gate, which is dedicated to opening the needle tongue and does not participate in knitting; S4. After the loop lifting step is completed, open the needle tongue through the dedicated needle tongue opening device at the needle gate; S5. In the needle tongue opening step, the needle tongue opener interacts with the needles; S6. Through the above needle tongue opening operation, cooperate with the subsequent knitting action to realize the leg function or hole effect of the fabric; S7. The above steps are repeated in each knitting cycle.
[0007] Preferably, the loop lifting operation is completed in one of the last two paths, specifically including controlling the needle to ascend and descend under the action of the loop lifting cam, so that the loop is lifted from the needle hook to form a loop lifting structure.
[0008] Preferably, the latch opener is a mechanical structure, including a specific-shaped opening piece, which is fixed to the needle gate through a mounting seat and matches the needle movement track to push the latch open through mechanical contact.
[0009] Preferably, the latch opener is a magnetic control structure, including a magnetic assembly, which generates a magnetic field acting on the needle latch of the needle to change the latch from a closed state to an open state.
[0010] Preferably, the position of the latch opener is adjustable, and the opener is matched with needles of different specifications by adjusting the height and angle of the mounting seat.
[0011] Preferably, the latch opening step is performed immediately after the loop lifting step.
[0012] Preferably, the cam used in the loop lifting operation is a special loop lifting cam.
[0013] Preferably, the profile of the loop lifting cam includes a guide section, a loop lifting section and a reset section, corresponding to the ascending, loop lifting and descending reset actions of the needle respectively.
[0014] Preferably, the mounting seat of the latch opener is provided with scales or positioning mechanisms.
[0015] Preferably, the timing of the latch opening operation is realized through a mechanical linkage or an electric control system.
[0016] The design scheme of the present application has the following advantages in application: 1. The present application sets a special loop lifting step and an independently working latch opening device, which significantly improves the stability and reliability of the knitting process. In the loop lifting step, the needle completes the ascending and descending actions under the accurate control of the cam, so that the loop is smoothly lifted to form a clear loop lifting structure. Then, the independently installed latch opener at the needle gate immediately operates the latch to change it from a closed state to an open state. 2. As described in 1, the adjustable latch opener design enhances the adaptability and flexibility of the equipment. The latch opener is fixed to the rack through a mounting seat, and its height and angle can be flexibly adjusted according to needles of different specifications. Whether it is a mechanical structure or a magnetic control structure, it can accurately match the movement track of the needle to ensure the effectiveness of the latch opening operation. 3、The step of optimizing the knitting cycle is described in 2, which helps to realize complex fabric effects and improve product quality, by performing the opening operation immediately after the knockover, ensuring that the latch is in a knittable state before the next knitting cycle begins, providing a reliable basis for subsequent tuck or hole knitting actions, and the entire process is repeated in each knitting cycle, making the fabric structure uniform and consistent, and the tuck and hole effects clear and stable. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The overall scheme of the present application is shown in the figure. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.
[0019] Embodiment one Reference Figure 1 A method for opening the latch of an up-and-down jacquard thread regulator, comprising the following steps: S1. Perform a knockover operation on one of the last two routes to form a hole or knockover structure in the fabric; S2. In the knockover step, the needle is controlled by the cam to move up and down to complete the knockover action; S3. Position the latch opener at the needle gate of an independent route, which is used only for opening the latch and does not participate in knitting; S4. After the knockover step is completed, perform an opening operation on the latch through the special latch opening device at the needle gate; S5. In the latch opening step, the latch opener interacts with the needle; S6. Through the above latch opening operation, cooperate with the subsequent knitting action to realize the tuck function or hole effect of the fabric; S7. The above steps are repeated in each knitting cycle.
[0020] Among them, the knockover operation is completed in one of the last two routes, specifically including controlling the needle to move up and down under the action of the knockover cam, so that the loop falls off the needle hook to form a hole or knockover structure, and the knockover cam is designed as a replaceable structure according to the knitting requirements, which facilitates the adaptation of different fabric organizations and improves the adaptability and knitting efficiency of the machine.
[0021] Among them, the latch opener is a mechanical structure, including an opening sheet with a specific shape, which is fixed to the needle gate through a mounting seat and matches the motion trail of the needle, and the latch is opened by mechanical contact. The opening sheet is made of wear-resistant material, with a smooth surface to reduce wear on the latch and prolong the service life of the needle and the opener.
[0022] The latch opener is a magnetic control structure, including a magnetic component that generates a magnetic field acting on the latch of the needle, causing it to change from a closed state to an open state. The magnetic control method does not require direct contact with the latch, is suitable for high-speed operation of the knitting machine, can effectively reduce noise and mechanical wear, and improves operation stability.
[0023] The position of the latch opener is adjustable, and by adjusting the height and angle of the mounting seat, the opener can be matched with different specifications of knitting needles. The adjustment mechanism can use threaded cooperation or slider structure, which is convenient for on-site quick adjustment and adapts to various needle types and knitting process requirements.
[0024] The opening step is immediately executed after the loop lifting step, which ensures that the latch is in the correct state before the next knitting cycle starts, avoids missing stitches or knitting errors, and improves product quality and knitting success rate.
[0025] The cam used for the loop lifting operation is a special loop lifting cam, which is optimized and designed to accurately control the motion trajectory of the knitting needle, ensuring stable and reliable loop lifting action, and is suitable for high-density or special organization knitting requirements.
[0026] The profile of the loop lifting cam includes a guide segment, a loop lifting segment, and a reset segment, corresponding to the lifting, loop lifting, and descending reset actions of the knitting needle respectively. The curves of each segment smoothly transition, reducing needle impact and improving machine running stability and cam life.
[0027] The mounting seat of the latch opener is provided with a scale or positioning mechanism. The scale mark facilitates accurate adjustment of the opener position by the operator, and the positioning mechanism such as pin hole or clamping groove can ensure installation repeatability, improve debugging efficiency and consistency.
[0028] The timing of the opening operation is realized by mechanical linkage or electric control system. The mechanical linkage can be synchronized with the main shaft through cam or connecting rod, and the electric control system uses sensors and PLC to realize precise control, adapting to the upgrading demand of automation and intelligence.
[0029] In specific implementation The principle is based on the cooperation of precise timing control and loop lifting, and the core is to ensure the correct conversion of the state of the needle in the key knitting cycle through strict step sequence and timing cooperation. The principle starts from the loop lifting operation in one of the last two ways, and the special loop lifting cam precisely controls the lifting and lowering movement of the needle, forcing the old loop to fall off from the needle hook, thereby forming the required loop lifting structure on the fabric, laying the foundation for the subsequent loop lifting function. Then, immediately after the loop lifting step is completed, the process is transferred to an independent way located at the needle gate. This way is specially designed for needle tongue opener and does not participate in knitting, but only responsible for opening the needle tongue of the passing needle. This timing arrangement of opening the needle tongue immediately after loop lifting is crucial, which ensures that all needle tongues are reliably opened before the next knitting cycle starts, and the needle tongue is in the correct state of waiting for knitting, thereby effectively avoiding the problems of missing needle, needle collision or knitting error caused by unopened needle tongue. The timing of the whole process can be achieved through mechanical linkage system such as cam connecting rod and main shaft synchronization, or through precise control by sensor and PLC electric control system, which not only ensures the reliability of the current action, but also provides a basis for the automation and intelligent upgrading of the machine. The above steps are repeated in each knitting cycle to form a stable and efficient working rhythm. The principle focuses on how the needle tongue opener achieves efficient and reliable matching with different needles and processes through diversified structural design and adjustability. The needle tongue opener mainly includes mechanical and magnetic control types. The mechanical opener contains an opening sheet with a specific shape, which is fixed at the needle gate through a mounting seat. Its shape is accurately matched with the movement trajectory of the needle. When the needle passes, the needle tongue is pushed to open by direct mechanical contact. In order to reduce wear, the opening sheet is made of wear-resistant material and keeps the surface smooth. The magnetic control type uses non-contact driving, whose core is a magnetic component that generates a specific magnetic field to exert a magnetic force on the needle tongue, causing it to flip and open. This method completely avoids mechanical contact, especially suitable for high-speed running knitting machines, which can significantly reduce operating noise and mechanical wear. In addition, the needle tongue opener has high adjustability. Its mounting seat is usually designed with adjustment mechanisms such as threaded cooperation or sliding block structure, allowing operators to quickly adjust the height and angle of the opener according to the specifications of the used needle, ensuring accurate action points. In order to further improve the accuracy and efficiency of the adjustment, the mounting seat may also be equipped with positioning mechanisms such as scale markings, pin holes, and clamping grooves to facilitate accurate adjustment and ensure the consistency of repeated installation, thereby widely adapting to the needs of various needle types and knitting processes. The optimization trajectory control of the lifting cam and the principle of modular design. The core of this principle lies in precisely guiding the knitting needle to complete complex lifting actions by designing a special and replaceable lifting cam, and endowing the machine with good process adaptability. The lifting cam is a specially optimized and designed special cam, whose profile is not a simple inclined plane, but is finely divided into several functional segments according to the physical process of lifting, usually including a guide segment, a lifting segment and a reset segment. The guide segment is responsible for smoothly lifting the knitting needle to the required height; the lifting segment controls the knitting needle to stay at the highest point for a short time or to perform a specific movement, ensuring that the old loop reliably falls off the needle hook; the reset segment guides the knitting needle to smoothly descend to the starting position, and the curves between the segments realize smooth transition, aiming to minimize the impact and stress generated by the knitting needle during high-speed movement, thereby improving the smoothness of the machine operation and prolonging the service life of the cam itself. More importantly, the lifting cam is designed as a replaceable modular structure, which means that different profile curves can be quickly replaced according to different knitting needs, such as knitting high-density fabrics or special organizational structures. This modular design greatly improves the adaptability and knitting efficiency of the machine, enabling a thread tensioner to flexibly cope with diversified fabric production requirements without the need for complex and time-consuming overall modification.
[0030] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art, according to the technical solution and inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A method of opening a needle tongue of an up-and-down jacquard thread guide, characterized in that: The method comprises the following steps: S1. A loop is formed in one of the last two rows, and the fabric is formed into a loop or a loop structure; S2. In the loop removal step, the needle is raised and lowered under the control of the cam to complete the loop removal action; S3. The latch opener is positioned at the needle gate, and the needle gate is used for opening the latch and is not involved in knitting; S4. After the loop removal step is completed, the latch is opened by the special latch opening device at the needle gate; S5. In the latch opening step, the latch opener interacts with the needle; S6. Through the above latch opening operation, the subsequent knitting action is matched to realize the function of the fabric or the loop effect; S7. The above steps are repeated in each knitting cycle.
2. The method of claim 1, wherein the needle tongue is opened by a needle opening cam. The loop removal operation is completed in one of the last two rows, and specifically includes controlling the needle to rise and fall under the action of the loop removal cam, so that the loop is removed from the needle hook to form a loop or a loop structure.
3. The method according to claim 2, wherein: The latch opener is a mechanical structure, which includes an opening sheet with a specific shape, and the opening sheet is fixed to the needle gate through a mounting seat and matches the needle movement track to push the latch open through mechanical contact.
4. The method of claim 3, wherein the needle tongue is opened by a needle opening cam. The latch opener is a magnetic control structure, which includes a magnetic assembly that generates a magnetic field acting on the needle latch to change it from a closed state to an open state.
5. The method of claim 4, wherein the needle tongue is opened by a needle opening cam. The position of the latch opener is adjustable, and the height and angle of the mounting seat are adjusted to match the opener with different specifications of the needle.
6. The method of claim 5, wherein the needle tongue is opened by a needle opening cam. The latch opening step is executed immediately after the loop removal step.
7. The method according to claim 6, wherein: The cam used in the loop removal operation is a special loop removal cam.
8. The method of claim 7, wherein the needle tongue is opened by a needle opening cam. The profile of the loop removal cam includes a guide section, a loop removal section and a reset section, which correspond to the rising, loop removal and descending reset actions of the needle respectively.
9. The method of claim 8, wherein the needle tongue is opened by a needle opening cam. The mounting seat of the latch opener is provided with a scale or a positioning mechanism.
10. The method for opening the needle tab of a jacquard yarn adjusting machine according to claim 9, characterized in that: The timing of the latch opening operation is realized by a mechanical linkage or an electric control system.