阅读说明：本技术 一种三贾卡双针床经编织物的工艺 (Process of three-jacquard double-needle-bed warp knitted fabric ) 是由 郑春乐 许红先 黄亮亮 于 2021-09-24 设计创作，主要内容包括：本发明提供了一种三贾卡双针床经编织物的工艺,编织的机器采用的成圈机件为复合针,机器的梳栉排布前到后的顺序为前地梳,三套贾卡梳和后地梳；所述工艺的成圈步骤如下：S1、前针床槽针上升到高位,准备垫纱；S2、纱线完成前针床针钩垫纱；S3、前针床槽针下降,纱线垫入针钩中,针芯逐渐关闭针钩；S4、前针床槽针继续向下运动,在前针床脱圈板的作用下,线圈从槽针上脱落,完成脱圈过程；S5、后针床的槽针和针芯上升；S6、后针床沉降片阻止线圈上升,槽针和针芯上升的速度差异使针钩开启,针钩内纱线滑出进入针杆；S7,后针床槽针上升达到高点,按工艺垫纱,重复前针床的步骤；本发明能够实现双针床多贾卡经编机的针钩闭合从消极变积极控制。(The invention provides a process for three-jacquard double-needle-bed warp knitting fabric, wherein a knitting machine adopts a knitting machine element as a composite needle, and the front-ground, three sets of jacquard combs and rear-ground combs are arranged in the front-to-rear sequence of the guide bars of the machine; the looping step of the process is as follows: s1, lifting the grooved needles of the front needle bed to a high position to prepare for yarn laying; s2, finishing front needle bed hook yarn laying by yarns; s3, lowering the front needle bed groove needle, padding the yarn into the hook, and gradually closing the hook by the needle core; s4, the front needle bed groove needle continues to move downwards, and the coil falls off from the groove needle under the action of the front needle bed knockover plate, so that the knockover process is completed; s5, lifting the grooved needle and the needle core of the back needle bed; s6, the back needle bed sinker prevents the coil from rising, the speed difference of the groove needle and the needle core makes the hook open, and the yarn in the hook slides out and enters the needle bar; s7, lifting the groove needle of the back needle bed to a high point, laying yarns according to the process, and repeating the steps of the front needle bed; the invention can realize that the hook closing of the double-needle bed multi-jacquard warp knitting machine is changed from negative to positive control.)

1. A process for three-jacquard double-needle bed warp knitting fabric is characterized in that: the knitting machine adopts a knitting machine element which is a compound needle, and the arrangement sequence of a guide bar cloth arranging machine of the machine from front to back is a knitting ground comb GB1, jacquard combs JB2.1, JB2.2, JB3.1, JB3.2, JB4.1, JB4.2 and a knitting ground comb GB 5; the front needle bed and the back needle bed are both provided with groove needles which are fixed on the groove needle bed, the upper ends of the groove needles are needle hooks, the side of the groove needles facing the needle hooks is provided with needle grooves, and the needle cores are fixed on the needle core bed; the needle core tip of the needle core can move up and down in the needle groove, so that the needle hook can be actively opened and closed, and the knocking-over plate is fixed on a needle bed and plays a role in holding and supporting the fabric upwards; the looping step of the process is as follows:

step S1, the front needle bed groove needle rises to the high position, the needle core retracts into the needle groove needle hook and is in the open state, and the yarn moves towards the front needle bed needle hook; the coil on the needle rod is pressed above the sinker, so that the coil is prevented from rising along with the rising of the slot needle;

step S2, finishing the action of front needle bed hook yarn laying according to the requirement by the yarn;

step S3, the yarn descends around the grooved needle of the front needle bed after the needle, the yarn is padded into the needle hook, the grooved needle of the front needle bed descends, the sinker of the front needle bed retreats, the coil on the knocking-over plate of the front needle bed moves opposite to the direction of the needle hook, the needle core of the front needle bed descends along with the descending of the grooved needle of the front needle bed, the opening of the needle hook is gradually sealed due to the speed difference, and the coil slides on the outer surface of the needle point of the needle core;

step S4, the grooved needle moves downwards continuously, the opening of the needle hook is sealed by the needle point of the needle core, the yarn in the needle hook is prevented from running out of the needle hook, the grooved needle does not descend when moving to the position above the needle hook and lower than the upper edge of the knocking-over plate, the coil falls off from the grooved needle, and the knocking-over process is completed;

step S5, the groove needle and the needle core of the back needle bed rise, the rising speed of the needle core of the back needle bed is slower than that of the groove needle of the back needle bed, and the needle hook opening is gradually opened;

step S6, the back needle bed sinker moves to the groove needle to prevent the coil and the back needle bed groove needle from rising together, the speed difference of the groove needle and the needle core makes the needle hook open, the yarn in the needle hook slides out to enter the needle bar; when the needle hook ascends, the loops in the needle hook move downwards relative to the groove needle due to the pulling effect of the fabric on the loops, and before the loops meet the needle core, the needle point of the needle core is completely immersed into the needle groove of the groove needle, and the loops continue to slide along the needle rod;

and 7, raising the groove needle of the back needle bed to a high point, lapping yarns according to requirements, repeating the steps S1-S4, and achieving the action circulation of the front and back needle bed knitting, thereby realizing the change of the knitting parts of the double-needle bed multi-jacquard warp knitting machine from latch needles to compound needles.

2. A process of three-jacquard double needle bed warp knitting fabric according to claim 1, characterized in that: the warp knitted fabric is knitted by a double needle bed warp knitting machine which is provided with three sets of jacquard devices and a knitting machine part with a compound needle, has unique three-dimensional appearance and pattern appearance and excellent formability, and achieves the aim of compounding multiple procedures in the prior art by one-time procedures.

3. A process of three-jacquard double needle bed warp knitting fabric according to claim 1, characterized in that: in the knitting process of the fabric, the fabric can be wholly or partially knitted on any one of the front needle bed and the back needle bed according to product requirements, and the problem that the double-needle bed fabric cannot be partially or wholly separated from a single needle bed is solved.

4. A process of three-jacquard double needle bed warp knitting fabric according to claim 2, characterized in that: the unique three-dimensional appearance and the pattern appearance have different expression modes of common type, embroidery type, collapse type, hollow type, partial surface layer disappearance and bottom exposure type, pattern or hole lifting on the bottom, knife cutting type slope type, surface covering thin net type and penetrating type hole type.

5. A process of three-jacquard double needle bed warp knitting fabric according to claim 1, characterized in that: the warp knitting machine for production is equipped with three sets of jacquard devices, and the knitting machine parts adopt compound needles.

6. A process of three-jacquard double needle bed warp knitting fabric according to claim 1, characterized in that: the motion cycle in the step S7 must be completed only by changing the latch needle into a knitting machine element of a compound needle, and the opening and closing of the passive type needle hook is changed into the opening and closing of the active type needle hook, so that the unique padding needle selection operation can be realized, and the unique double-needle bed multi-jacquard warp knitting fabric can be woven.

Technical Field

The invention relates to the field of textile machinery and textile weaving, in particular to a process of a three-jacquard double-needle-bed warp knitting fabric.

Background

In the double-needle bed fabric, because the double-needle bed fabric has the characteristic of multiple layers, the mutual relation is tight, other composite processes are not needed, and special composite products can be made through special design.

The current double-needle bar fabric mainly comprises jacquard fabric and non-jacquard fabric, the jacquard fabric can improve the aesthetic degree of the fabric due to the jacquard effect, the fabric gradually becomes the mainstream of decorative products, and machine manufacturers and fabric manufacturers also research and develop the double-needle bar jacquard fabric as an important direction.

In the double-needle bar jacquard fabric, a common single jacquard structure is simple, the jacquard effect is not good enough, and multiple jacquard fabrics (double jacquard and three jacquard) gradually appear in the market. However, after the multi-jacquard double-needle bed fabric appears, the appearance is not greatly improved, only the pattern complexity is changed, the structural change is not large, and the product differentiation is not large. The problem is mainly caused by the fact that the development of the double-needle-bed multi-jacquard fabric is influenced by functions of a machine, so that the double-needle-bed multi-jacquard warp knitting machines in the market at present all adopt latch needles as knitting parts, and the adoption of the latch needles greatly limits product design and machine running smoothness.

The following explanation is made based on the latch needle looping principle:

referring to FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the knitting process of the back needle bed is shown. As shown in fig. 1, the latch needle 4 is raised to the high position, the latch 3 is in the open state, the yarn 1 moves toward the hook 2, and the sinker 5 presses the loop 9 on the needle bar, preventing the loop 9 from rising with the raising of the latch needle 4. Due to the pulling roller, a downward force is applied to pull the fabric 7, which results in a downward movement of the stitches 9, but due to the presence of the knockover plate 6, which prevents the downward movement of the stitches, the knockover plate 6 is fixed to the needle bed 8, and the needle bed 8 supports the downward pulling force of the fabric. In fig. 2, the thread 1 is moved around the hook 2, the latch 3 and the sinker 5 are not changed in their state. As shown in fig. 3, the yarn 1 is inserted into the hook 2 after the yarn 1 is moved around the hook 2, the latch needle 4 is lowered, the sinker 5 is retreated, and the loop 9 approaches the latch 3. As shown in fig. 4, as the latch needle 4 descends, the force of the loop 9 lifts the latch 3 up gradually, and the loop 9 slides on the outer surface of the latch 3. As shown in fig. 5, the latch needle 4 continues to move downwards, the opening of the hook 2 is closed by the latch 3, the yarn 1 in the hook 2 is prevented from running out of the hook 2, the latch needle 4 moves until the upper part of the hook 2 is lower than the upper edge of the knocking-over plate 6, the yarn does not descend any more, the coil 9 falls off from the latch needle 4, and the knocking-over process is completed. After the front needle bed is completely separated from the loop, the latch needle 4 of the back needle bed starts to rise, when the latch needle rises, the loop 9 in the needle hook moves downwards relative to the latch needle 4 due to the pulling effect of the fabric 7 on the loop 9, the needle latch 3 is gradually opened, and the latch needle slides over the surface of the opened needle latch 3. The sinker 5 starts to move towards the latch needle 4, and in cooperation with the continuous ascending movement of the latch needle 4, the coil 9 is prevented from ascending together with the needle rod due to friction force, the latch needle 4 ascends to the highest point, and the steps in fig. 1 are repeated.

From the above looping principle we conclude that: the latch 3 is passive in opening and closing, and the passive latch design has the following problems: if the latch needle hook 2 lacks yarns, the opening/closing state of the latch 3 cannot be accurately ensured, when the latch 3 is in the closing state, the yarns 1 are laid in the latch needle hook 2, the yarns 1 can slide along the outer edge of the closed latch 3, the yarn laying failure is caused, and if a corresponding non-yarn laying process is designed, the smooth knitting cannot be realized. This is also the biggest problem with latch needles as loop-forming needles. In addition, in this passive manner, even if the fabric is designed as required, the use state of the latch 3 is a problem, and the accuracy is relatively difficult to ensure, so that cloth defects are easily generated, and the qualified product of the fabric is low. The above situations severely limit the development of double-needle bed jacquard fabrics, and particularly the development and research of double-needle bed multi-jacquard fabrics needing needle selection according to requirements. The market is expecting to have a machine which can support the free needle selection, and is more expecting to have a brand-new double-needle bed multi-jacquard fabric developed by the machine.

Disclosure of Invention

In view of the above, the present invention provides a technology for changing the latch needle into the compound needle of the knitting machine of the double-needle bed multi-jacquard warp knitting machine.

The invention is realized by adopting the following method: a process for three-jacquard double-needle bed warp knitting fabric, wherein a knitting machine adopts a knitting machine element as a composite needle, and the arrangement sequence from the front of a guide bar cloth arranging machine of the machine to the back of the machine is a knitting ground comb GB1, jacquard combs JB2.1, JB2.2, JB3.1, JB3.2, JB4.1 and JB4.2, and a knitting ground comb GB 5; the front needle bed and the back needle bed are both provided with groove needles which are fixed on the groove needle bed, the upper ends of the groove needles are needle hooks, the side of the groove needles facing the needle hooks is provided with needle grooves, and the needle cores are fixed on the needle core bed; the needle core tip of the needle core can move up and down in the needle groove, so that the needle hook can be actively opened and closed, and the knocking-over plate is fixed on a needle bed and plays a role in holding and supporting the fabric upwards; the looping step of the process is as follows:

step S1, the front needle bed groove needle rises to the high position, the needle core retracts into the needle groove needle hook and is in the open state, and the yarn moves towards the front needle bed needle hook; the coil on the needle rod is pressed above the sinker, so that the coil is prevented from rising along with the rising of the slot needle;

step S2, finishing the action of front needle bed hook yarn laying according to the requirement by the yarn;

step S3, the yarn descends around the grooved needle of the front needle bed after the needle, the yarn is padded into the needle hook, the grooved needle of the front needle bed descends, the sinker of the front needle bed retreats, the coil on the knocking-over plate of the front needle bed moves opposite to the direction of the needle hook, the needle core of the front needle bed descends along with the descending of the grooved needle of the front needle bed, the opening of the needle hook is gradually sealed due to the speed difference, and the coil slides on the outer surface of the needle point of the needle core;

step S4, the grooved needle moves downwards continuously, the opening of the needle hook is sealed by the needle point of the needle core, the yarn in the needle hook is prevented from running out of the needle hook, the grooved needle does not descend when moving to the position above the needle hook and lower than the upper edge of the knocking-over plate, the coil falls off from the grooved needle, and the knocking-over process is completed;

step S5, the groove needle and the needle core of the back needle bed rise, the rising speed of the needle core of the back needle bed is slower than that of the groove needle of the back needle bed, and the needle hook opening is gradually opened;

step S6, the back needle bed sinker moves to the groove needle to prevent the coil and the back needle bed groove needle from rising together, the speed difference of the groove needle and the needle core makes the needle hook open, the yarn in the needle hook slides out to enter the needle bar; when the needle hook ascends, the loops in the needle hook move downwards relative to the groove needle due to the pulling effect of the fabric on the loops, and before the loops meet the needle core, the needle point of the needle core is completely immersed into the needle groove of the groove needle, and the loops continue to slide along the needle rod;

and 7, raising the groove needle of the back needle bed to a high point, lapping yarns according to requirements, repeating the steps S1-S4, and achieving the action circulation of the front and back needle bed knitting, thereby realizing the purpose of changing the knitting parts of the double-needle bed multi-jacquard warp knitting machine into compound needles by latch needles.

Furthermore, the warp knitted fabric is knitted by a double needle bed warp knitting machine which is provided with three sets of jacquard devices and a knitting machine part which is provided with a compound needle, the warp knitted fabric has unique three-dimensional appearance and pattern appearance and excellent formability, and the aim of compounding multiple procedures in the prior art is fulfilled by one-time procedures.

Furthermore, in the knitting process of the fabric, the fabric can be wholly or partially knitted on any one of the front needle bed and the back needle bed according to the product requirements, and the problem that the double-needle bed fabric cannot be partially or wholly separated from the single needle bed is solved.

Furthermore, the unique three-dimensional appearance and the unique pattern appearance have different expression modes of common type, embroidery type, collapse type, hollow type, partial surface layer disappearance and bottom exposure type, pattern or hole lifting on the bottom, knife cutting type slope type, surface covering thin net type and penetrating type hole type.

Furthermore, the warp knitting machine for production is equipped with three sets of jacquard devices, and the knitting machine parts adopt compound needles.

Furthermore, the motion cycle in step S7 must be completed only by changing the latch needle into a knitting machine of a compound needle, and the opening and closing of the passive type needle hook is changed into the opening and closing of the active type needle hook, so as to achieve the unique yarn laying and needle selecting operation, and then weave the unique double-needle bed multi-jacquard warp knitting fabric.

The invention has the beneficial effects that: the warp knitted fabric is knitted by a double-needle bed warp knitting machine which is provided with three sets of jacquard devices and a knitting machine part provided with a compound needle, has unique three-dimensional appearance and pattern appearance and excellent formability, achieves the aim of compounding multiple processes in the prior art by one-time process, greatly improves the efficiency and saves the cost; the warp knitting machine for production is provided with three sets of jacquard devices, and the knitting machine parts adopt compound needles, so that products with different types of structures can be produced; three sets of jacquard patterns can obviously increase the three-dimensional effect and improve the complexity of patterns, the looping machine element adopts a compound needle which replaces a latch needle, the technical revolution is realized, the accuracy of yarn laying and knocking over is greatly improved, and meanwhile, the occurrence of cloth cover defects can be greatly reduced; the adoption of the composite needle can produce products with completely different types of structures compared with the latch needle; the production warp knitting machine can be completely compatible with the existing latch needle double-needle bed warp knitting machine technology, and the fabric can also have the characteristics of latch needle double-needle bed products on the market. The updating and upgrading of any product, the compatibility with the prior art is an effective method for increasing the product breadth, and is also an aspect of necessary thinking of the new technology; the warp knitting machine for production determines the knitting mode of yarns on a needle bed by a process, can randomly control the yarn laying and non-yarn laying of each jacquard yarn on a needle hook, and lays yarns on the needle, so that the type of products is greatly enriched; the unique three-dimensional appearance and the pattern appearance are different expression modes such as a common mode, an embroidery mode, a collapse mode, a hollow mode, a partial surface layer disappearance and bottom exposure mode (patterns or holes can be raised on the bottom), a cutting type slope mode, a surface covering thin net mode, a penetrating type hole mode and the like, and the modes can appear in the fabric independently or in a combined mode; the double-needle bed multi-jacquard fabric has abundant selectable contents which are unprecedented, and the products with various styles and abundant varieties can be produced through the careful collocation of designers; the fabric has unique formability, can be formed at one time, is free from splicing and bonding, and can be integrated with the subsequent process; when the fabric is designed, the characteristic of the coloring difference of different yarns is utilized, and a unique pattern structure and a unique three-dimensional structure are formed through the design and process efforts, so that the requirements of the market on the pattern complexity and the attractiveness are met.

Drawings

FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5 are schematic views of a prior art latch needle knitting machine knitting process.

FIG. 6 is a schematic process flow diagram of the present invention.

FIG. 7 is a schematic view of the bar arrangement of the knitting machine of the present invention.

FIG. 8 is a schematic view of the looping mechanism of the warp knitting machine of the present invention.

Fig. 9, fig. 10, fig. 11, fig. 12 and fig. 13 are schematic diagrams of the composite needle looping process of the invention.

FIG. 14 is a schematic front and back needle bed knitting of the yarn of the present invention.

FIG. 15 is a schematic illustration of the knitting of the yarn of the present invention on the back needle bed.

FIG. 16 is a schematic view of the knitting of the yarn of the present invention on the front needle bed.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 6, in the process of the three-jacquard double-needle bed warp knitting fabric of the present invention, the knitting machine uses a knitting machine with compound needles, and the arrangement sequence of the front and rear guide bar plaiting machines of the machine is a knitting ground comb GB1, jacquard combs JB2.1, JB2.2, JB3.1, JB3.2, JB4.1, JB4.2, and knitting ground comb GB 5; the front needle bed and the back needle bed are both provided with groove needles which are fixed on the groove needle bed, the upper ends of the groove needles are needle hooks, the side of the groove needles facing the needle hooks is provided with needle grooves, and the needle cores are fixed on the needle core bed; the needle core tip of the needle core can move up and down in the needle groove, so that the needle hook can be actively opened and closed, and the knocking-over plate is fixed on a needle bed and plays a role in holding and supporting the fabric upwards; the looping step of the process is as follows:

step S1, the front needle bed groove needle rises to the high position, the needle core retracts into the needle groove needle hook and is in the open state, and the yarn moves towards the front needle bed needle hook; the coil on the needle rod is pressed above the sinker, so that the coil is prevented from rising along with the rising of the slot needle;

step S2, finishing the action of front needle bed hook yarn laying according to the requirement by the yarn;

step S3, the yarn descends around the grooved needle of the front needle bed after the needle, the yarn is padded into the needle hook, the grooved needle of the front needle bed descends, the sinker of the front needle bed retreats, the coil on the knocking-over plate of the front needle bed moves opposite to the direction of the needle hook, the needle core of the front needle bed descends along with the descending of the grooved needle of the front needle bed, the opening of the needle hook is gradually sealed due to the speed difference, and the coil slides on the outer surface of the needle point of the needle core;

step S4, the grooved needle moves downwards continuously, the opening of the needle hook is sealed by the needle point of the needle core, the yarn in the needle hook is prevented from running out of the needle hook, the grooved needle does not descend when moving to the position above the needle hook and lower than the upper edge of the knocking-over plate, the coil falls off from the grooved needle, and the knocking-over process is completed;

step S5, the groove needle and the needle core of the back needle bed rise, the rising speed of the needle core of the back needle bed is slower than that of the groove needle of the back needle bed, and the needle hook opening is gradually opened;

step S6, the back needle bed sinker moves to the groove needle to prevent the coil and the back needle bed groove needle from rising together, the speed difference of the groove needle and the needle core makes the needle hook open, the yarn in the needle hook slides out to enter the needle bar; when the needle hook ascends, the loops in the needle hook move downwards relative to the groove needle due to the pulling effect of the fabric on the loops, and before the loops meet the needle core, the needle point of the needle core is completely immersed into the needle groove of the groove needle, and the loops continue to slide along the needle rod;

and 7, raising the groove needle of the back needle bed to a high point, lapping yarns according to requirements, repeating the steps S1-S4, and achieving the action circulation of the front and back needle bed knitting, thereby realizing the purpose of changing the knitting parts of the double-needle bed multi-jacquard warp knitting machine into compound needles by latch needles. The action cycle can be completed only by changing a latch needle into a looping machine element of a compound needle, and the opening and closing of a passive type needle hook is changed into the opening and closing of a positive active type needle hook, so that the unique lapping and needle selecting operation can be realized, and the unique double-needle bed multi-jacquard warp-knitted fabric can be woven; as the composite needle is innovatively adopted, more jacquard devices or other guide bars can be arranged to improve the complexity and the function of pattern design.

In the knitting process of the fabric, the fabric can be wholly or partially knitted on any one of the front needle bed and the back needle bed according to product requirements, and the problem that the double-needle bed fabric cannot be partially or wholly separated from a single needle bed is solved.

The invention is further illustrated by the following specific examples:

the latch needle looping mechanism can bring risks on product quality and defects on product design due to the fact that the needle latch moves in a passive mode, and development of processes and designs is limited. The latch needle is changed into a compound needle which actively opens and closes a needle hook, so that a plurality of problems of using the latch needle can be fundamentally solved.

The looping mechanism structure of the compound needle is shown in figure 8, a grooved needle 11 is arranged on a front needle bed and fixed on the grooved needle bed, a needle hook 13 is arranged at the upper end of the grooved needle 11, a needle groove is arranged on the side of the grooved needle 11 facing the needle hook 13, the needle groove can just receive a needle core point, the needle core 12 is fixed on the needle core bed, the needle core point of the needle core 12 can move up and down in the needle groove, so that the active opening and closing of the needle hook 13 are realized, and a knocking-over plate 14 is fixed on the needle bed and plays a role in holding and supporting the fabric upwards. The back needle bed is provided with a groove needle 18 fixed on the groove needle bed, the upper end of the groove needle 18 is a needle hook 16, the groove needle 18 is provided with a needle groove facing the needle hook 16 side, the needle groove can just accommodate a needle core point, the needle core 17 is fixed on the needle core bed, the needle core point of the needle core 17 can move up and down in the needle groove, so that the active opening and closing of the needle hook 16 are realized, and the knocking-over plate 15 is fixed on the needle bed and plays a role in holding and supporting the fabric upwards. The configuration of the needle hook 13 and the needle hook 16 is that the needle hooks are opposite, the left needle bed, the right needle bed, the groove needle bed and the needle core bed move independently to drive the upper knocking-over plate, the groove needle and the needle core to move correspondingly, and the purpose that all needles move according to respective motion curves is achieved.

Fig. 9, 10, 11, 12 and 13 are schematic diagrams of the looping movement of the grooved needle mechanism, as shown in fig. 9, the grooved needle 17 is lifted to the high position, the hook 17 is in the open state, the yarn 16 moves towards the hook 17, the sinker 19 presses the loop 24 on the needle bar, and the loop 24 is prevented from lifting along with the lifting of the grooved needle 18. Due to the pulling roller, a downward force is applied to pull the fabric 22, which results in a downward movement of the stitches 24, but due to the presence of the knockover plate 20, which prevents the downward movement of the stitches, the knockover plate 20 is fixed to the needle bed 23, and the needle bed 23 supports the downward pulling force of the fabric. In fig. 10, the yarn 16 is moved around the hook 17, the needle groove 18 and the sinker 19 are not changed in their state. As shown in fig. 11, after the yarn 16 has moved around the hook 17, the yarn 16 is inserted into the hook 17, the grooved needle 18 is lowered, the sinker 19 is retracted, and the loop 24 is moved toward the hook 17. As shown in fig. 12, the core 21 is lowered as the slot needle 17 is lowered, but the lowering speed is slower than that of the slot needle 17, and the opening of the hook 17 is gradually closed, and the loop 24 slides on the outer surface of the needle tip of the core 21. As shown in FIG. 13, the grooved needle 17 moves downward, the opening of the hook 17 is sealed by the needle point of the needle core 21, the yarn 16 in the hook 17 is prevented from running out of the hook 17, the grooved needle 18 moves to a position above the hook 17 and lower than the upper edge of the knock-off plate 20, the yarn does not descend, the loop 24 falls off the grooved needle 18, and the knock-off process is completed. After the front needle bed is completely separated from the loop, the grooved needle 18 and the needle core 21 of the back needle bed start to ascend, but the ascending speed of the needle core 21 is slower than that of the grooved needle 18, so that the opening of the needle hook 17 is gradually opened, when the needle hook ascends, the loop 24 in the needle hook moves downwards relative to the grooved needle 18 due to the pulling action of the fabric 22 on the loop 24, when the loop 24 meets the needle core 21, the needle point of the needle core 21 is completely submerged into the needle groove of the grooved needle 18 in advance, and the loop 24 continuously slides downwards along the needle rod to be held by the sinker 19. The sinker 19 starts to move towards the slot 17, and in cooperation with the continued raising movement of the slot 17, the loop 17 is prevented from rising with the shank of the needle due to friction, and the slot 17 is raised to the highest point, and the steps of fig. 9 are repeated.

The guide bars of the machine knitting area of the invention are arranged in the structure shown in fig. 7, and the arrangement sequence from the front to the back of the machine is a looping ground comb GB1, a first set of jacquard combs JB2.1, JB2.2, a second set of jacquard combs JB3.1, JB3.2, a third set of jacquard combs JB4.1, JB4.2 and a looping ground comb GB 5. The needle of 3 groups of jacquard combs can be driven to rotate to form a loop structure or a weft insertion structure according to the process requirements. And then different cloth cover effects are achieved by matching with different yarn threading modes. Under the specific requirements of the process, any one of the guide bars described above may possibly pass no yarn or only a part of the yarn, and how to pass the yarn is completely determined by the process design.

In the machine configuration of figure 7 above, the arrangement of the needle-guide elements, GB1, GB5, is in the full size configuration, each group of jacquard combs consisting of a front and a rear piece, each half size configuration being a single operating line, each group of jacquard forming a jacquard group, operating in cooperation under technological design. The sequence of the working line of the machine from front to back is GB1, JB2.1, JB2.2, JB3.1, JB3.2, JB4.1, JB4.2 and GB 5. If GB1 or GB5 are not selected for use by the process, they can be removed and placed in a safe and specific location during normal production.

As shown in fig. 8, the front needle bed grooved needles 11 are fixed to the front grooved needle bed, the front grooved needles 11 are fully set, the front core 12 is fixed to the front core bed, the front core 12 is fully set, the front knockover plate 14 is fixed to the front knockover plate bed, and the front knockover plate 14 is fully set. The back needle bed groove needle 18 is fixed on the back groove needle bed, the back groove needle 18 is fully configured, the back needle core 18 is fixed on the back needle core bed, the back needle core 18 is fully configured, the back knocking-over plate 15 is fixed on the back knocking-over plate bed, and the back knocking-over plate 15 is fully configured. The front and back grooved needle beds, the front and back needle core beds and the front and back sinker beds regularly move in a curve way to drive corresponding grooved needles, needle cores and knocking-over plates to move regularly, and the whole process of hooking, looping and knocking-over knitting of yarns is realized by the front grooved needle hook 13 and the back grooved needle hook 16. In the above cooperation, the grooved needle hooks on the front and back needle beds are outward (the front grooved needle hook 13 is toward the front of the machine, and the back grooved needle hook 16 is toward the back of the machine), the needles are opposite, the front and back looping machine parts are self-made into a system, and the operation time is not influenced mutually. In addition, the machine is also provided with sinkers for assisting in looping, the sinkers are respectively arranged on front and rear sinker beds and are configured in a full machine number mode, and the old coil is held in the looping process to play a role in assisting in looping.

As shown in fig. 14, the yarn is knitted in loops on two needle beds with a wide space band in the middle, which is a typical double needle bed fabric structure and is also the basic fabric structure of a latch needle machine, and the three-layer structure is well defined, and even if there is jacquard, the three-layer structure does not exceed the obvious three-layer structure.

As shown in FIG. 15, the yarn is knitted in loops only on the back needle bed, and no yarn is on the needles on the front needle bed (transient or long). The reason for this is that the guide needle with the yarn normally passes through the front needle bed, but the needle shift does not occur, and the guide needle is not hooked by the groove needle in the front needle bed, then the old loop is normally dropped, because there is no new yarn to be inserted, the yarn is no longer looped and knitted on the front needle bed, the fabric is dropped from the front needle bed, because the yarn has tension, the middle spacing yarn is strained, forming a slope appearance, because the fabric is knitted only on the back needle bed, it has the characteristic of single needle bed fabric, and at this time, the fabric with the surface depressed from the front to the back of the machine can be knitted (partially dropped, without being dropped around). When the front needle bed needs to be knitted, as long as the yarn guide needle moves transversely on the front needle bed, the yarn can be padded into the front groove needle hook of the machine, due to the downward pulling effect of the fabric, the yarn can be smoothly padded into a loop, and the yarn is restored to the knitting state of the front needle bed again.

As shown in fig. 16, the yarn is knitted in loops only on the front needle bed and no yarn is on the needles on the back needle bed (instantaneous or longer). The reason for this is that the guide needle with the yarn normally passes through the back needle bed, but the needle shift does not occur, and the yarn is not hooked by the groove needle after the machine, then the old loop is normally dropped, because there is no new yarn to be inserted, the yarn is no longer looped and knitted on the back needle bed, the fabric is dropped from the back needle bed, because the yarn has tension, the middle spacing yarn is strained, forming a slope appearance, because the fabric is knitted only on the front needle bed, it has the characteristic of single needle bed fabric, and at this time, the fabric depressed from the back surface to the front surface of the machine can be knitted (partially dropped, without being dropped around). When knitting needs to be carried out on the back needle bed, as long as the yarn guide needle moves transversely on the back needle bed, the yarn is padded into the rear groove needle hook, the yarn can be smoothly padded into a loop due to the downward pulling action of the fabric, and the yarn is restored to the knitting state of the back needle bed again.

As shown in fig. 14, 15, and 16, the fabric can be knitted by selecting the front needle bed, the back needle bed, or both the needle beds according to the process during the knitting. The selection may be to select which needle bed all the guide needles are knitting at the same time, or to perform knitting on a specific needle bed corresponding to the guide needle. Because the existence of merchant clamps the device, have the sideslip function to the merchant card needle of selecting, when removing in merchant card sley specific direction, can offset the sideslip of merchant card sley with the single needle sideslip to reach the purpose that single merchant card needle does not fill up the yarn, can reach like this which needle does not weave the yarn, reach the technology purpose. The random needle selection is realized on the basis of taking the composite needle as a looping machine element, and the composite needle can actively realize regular and accurate opening and closing of the needle hook, the opening and closing time and degree, and change the passive state of the opening and closing of the needle hook of the latch needle.

The latch needle is changed into the compound needle, so that the most core problem is solved, the arrangement and configuration of the guide bars disclosed by the invention can be changed and complicated, and any scheme for increasing the guide bar mode falls into the protection scope of the patent.

The following process example illustrates the specific embodiments:

a knitting machine: the guide bars of the double-needle bed three-jacquard warp knitting machine are arranged as shown in figure 1, and the arrangement sequence from front to back of the machine is a looping ground comb GB1, a first group of jacquard combs JB2.1 and JB2.2, a second group of jacquard combs JB3.1 and JB3.2, a third group of jacquard combs JB4.1 and JB4.2 and a looping ground comb GB 5. The needle of 3 groups of jacquard combs can be driven to rotate to form a loop structure or a weft insertion structure according to the process requirements. And then different cloth cover effects are achieved by matching with different yarn threading modes. Any one of the above guide bars may not pass a yarn or only pass a portion of a yarn under the specific requirements of the process, all as determined by the process design.

The needle track and the threading mode of each guide bar are as follows:

guide bar number	Needle track	Needle aligning mode	Threading method
				GB1	1-0-0-0-0-1-1-1//	Starting pair	Full puncture
JB2.1	1-0-1-1-1-2-1-1//	Starting pair	One at a distance from the other
				JB2.2	1-0-1-1-1-2-1-1//	Starting pair	One at a distance from the other
JB3.1	1-0-1-0-1-2-1-2//	Starting pair	One at a distance from the other
				JB3.2	1-0-1-0-1-2-1-2//	Starting pair	One at a distance from the other
JB4.1	1-0-1-0-1-2-1-2//	Starting pair	One at a distance from the other
				JB4.2	1-0-1-0-1-2-1-2//	Starting pair	One is separated from the otherWearing device
GB5	1-1-1-0-0-0-0-1//	Starting pair	Full puncture

Because JB2.1, JB2.2, JB3.1, JB3.2, JB4.1, JB4.2 can all go through the loop structure, so, GB1 and GB5 can be the alternative contents according to the process characteristics, either both can be selected, or only one can be selected, or both can not be selected, and it is preferable to select for high physical properties, and it is preferable to obtain a smooth surface, not to select.

In the above arrangement, the yarns of JB3.1, JB3.2, JB4.1, JB4.2 are knitted on the front and back needle beds for each course, if the jacquard has a single needle transfer function, which is not considered in the above process example. The yarns of JB2.1, JB2.2 and GB1 were knitted only on the front needle bed per course and the yarns of GB5 were knitted only on the back needle bed per course. In combination, both needle beds are integrally woven with yarns.

In the process example, the special single-needle moving factor of the jacquard can occur by adding the factor of the jacquard function, the single needle of the jacquard transversely moves, the comprehensive effect is that no needle is moved, the yarn of the needle-in hook of the pad is not padded, the yarn on the yarn guide needle in the layout does not participate in the knitting movement on the corresponding needle bed, the yarn retracts under the action of the tension of the yarn in the fabric of the other needle bed, and a large area of depression of the fabric occurs by the required non-participation of needle selection of a plurality of jacquard guide bars, so that the collapsed appearance is formed; in addition, due to the fact that the jacquard can move through a single needle, the jacquard can be changed into two lapping needles on the basis of the original lapping and needle moving, the extending lines can be lengthened due to the two needles, the yarn consumption is increased, the fabric can be thickened, the fabric can be higher than a single needle structure and lack of a lapping structure due to the two regular needles, and therefore the cloth cover has a convex appearance. In addition, a latch needle double-needle bed product can be produced by adopting an incomplete pad lacking mode, and a compatible effect is achieved.

According to the above example, since the jacquard guide needles pass through the jacquard at intervals, three groups of jacquard are combined to form various appearance effects according to the needle selection manner of the jacquard in which the single needle can move.

Through-hole holes: if three jacquard groups are stuck on two needle beds at the same needle position and no yarn is connected with the jacquard group, a through hole is formed, and the size of the hole depends on the number of courses for which the continuity state is continuous.

Collapse class: the grooved needles on the needle bed on the side of the using surface of the fabric are continuously provided with three groups of jacquard yarns in a certain width range, and the collapse with different local thicknesses is formed by partially or completely adopting a non-selective yarn-laying mode. In this case, the corresponding ground screen (GB1 or GB5, depending on the surface of use) must be removed from the front of the surface of use, thus highlighting the stereoscopic impression.

Partial surface disappearance and bottom exposure class: in the collapse-like variant, part or all of the jacquard yarn is selectively laid on the grooved needles of the needle bed on which it is normally laid, thus knitting a pattern or hole in the bottom layer.

Surface veined meshes: the collapse variants are provided with ground mesh (GB1 or GB5, determined by the surface of use) on the face side of use, so that the central depressed portion is masked by the thin mesh and is separated from the base fabric. Forming a double-layer cloth structure.

General classes: yarns on three jacquard combs (JB2.1, JB2.2, JB3.1, JB3.2, JB4.1 and JB4.2) and two bottom combs (GB1 and GB5) are arranged, and at least one yarn is required to be fed into a needle hook on each cross of the two needle beds, so that the state is the characteristic of the latch needle double-needle bed fabric, and the latch needle double-needle bed fabric can achieve a certain mesh effect, but has weak stereoscopic impression and poor pattern expression. Even in a common structure, the expression force of the fabric is greatly improved due to the three groups of jacquard combs, which is incomparable with common latch needle double-needle bed fabrics.

Bulge type: by utilizing the free needle selection function of three groups of jacquard combs (JB2.1, JB2.2, JB3.1, JB3.2, JB4.1 and JB4.2), under the design requirement, a single jacquard needle can be used for having the function of moving one needle more than the jacquard combs, the formed fabric is locally thickened due to the increase of the required amount of the yarns, the operation is continuously executed in the range of specific width and transverse number, and the bulge of one region is formed.

Hollow type: the middle discontinuous hollow structure enables the fabric to be lighter and thicker and has good pressing resilience. For part of jacquard yarns, the yarns retract under tension by using a mode of lacking pads of front and rear needle beds in a discontinuous and local mode to form fine cavities.

Embroidery: the pattern is a convex variety, not a walking surface, but a special convex pattern of the cloth surface, and the pattern is similar to a needle of an embroidery in appearance, so that the effect of imitating the embroidery is achieved.

Knife-cut slopes: when the fabric is in a convex or a concave shape, the connecting position of the type conversion can be made into a linear type boundary line for the attractive appearance, and a special needle moving method is adopted at the height change position of the boundary line to ensure that a slope appears at the height change position, so that the appearance effect of the high and low position can be better kept, and the fabric surface stain removal is facilitated.

According to the above example, during the process design, different cut pieces can be directly designed according to the style and size of the finished product, and when the finished product is produced, the corresponding product is cut according to the design and is directly sewed by a manufacturer. The one-time molding is achieved, splicing and bonding are avoided, integration of subsequent processes is achieved, the processes are saved, raw materials and labor cost are saved, and the utilization rate of resources is improved.

The yarn realizes the selection of front and back needle bed lapping yarns and the change of the covering sequence of the yarn on the fabric. In a local area, yarns to be displayed are laid on a display surface in a loop mode, the coverage is improved in a needle-crossing mode, the yarns behind are better shielded, and the yarns not to be displayed are retracted into the cloth in a non-yarn laying mode and are covered. When the originally covered yarn needs to be exposed, the originally exposed yarn is changed into covered yarn, and the two yarn covering modes can be changed. The change avoids transition lines, the surface of the fabric has free patterns, the patterns are clean, and the expression force is strong.

The invention mainly solves the technical problem of providing a three-jacquard double-needle-bed warp knitting fabric and a process thereof, so as to meet the requirements of multiple-jacquard double-needle-bed fabrics for three-dimensional and stylization in the market; the fabric is mainly used in shoe materials, cases and other ornaments, can be designed in one-step forming, and has the characteristic of no composite process.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.