Computerized knitting method of terry fabric based on auxiliary pulling

Abstract

This invention discloses a method for knitting terry fabrics on a computerized flat knitting machine based on assisted tension, belonging to the field of knitting machinery technology. The invention includes steps such as terry formation, terry fixing, and press-assisted loop release. In the terry formation step, the front and rear terry needles jointly hook the yarn, with one needle holding the main old loop and the other being an empty needle or guide needle, forming a terry loop drape arc. In the terry fixing step, yarn is fed in, causing the needle holding the old loop to form a loop. In the press-assisted loop release step, a presser foot or sinker is used to press the terry loop drape arc, making it taut against the needle to be released, and then driving the needle to release the loop. This invention also provides a method for forming single-color or two-color terry loops and alternating terry loops on the front and back sides of a single-sided plain knit fabric and on sesame dot jacquard weaves. This invention solves the problems of unstable loop release, uneven loops, and poor needle latch closure in existing terry loop systems, and is particularly suitable for special yarns such as mohair and sequined yarn, offering high knitting efficiency and rich patterns.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a knitting method for a computerized flat knitting machine, and in particular to a knitting method that can effectively solve the problems of unclear loop separation and chaotic structure in terry fabrics. Background Technology

[0002] The knitting of sweaters and woolen products has evolved from hand knitting to computerized flat knitting machines, with patterns continuously expanding from plain knit fabrics to jacquard, intarsia, cable knit, and openwork designs. Among these, terry cloth fabrics (commonly known as "terry cloth embroidery"), which have a three-dimensional floral effect, are very popular in the market. However, existing terry knitting technology is still not mature enough on computerized flat knitting machines, especially in the process of loop unwinding, which is not stable enough.

[0003] This is mainly due to the loose yarn drape inherent in the terry structure. During the needle's ascent and undocking phase, these loose loops easily float irregularly with the needle latch, leading to uneven loop size, poor latch closure, and even yarn breakage or complete inability to undo the loops (i.e., "incomplete loop undoing"). This problem is even more pronounced when using specialty yarns such as mohair, single-sided fleece, sequined yarn, core-spun yarn, and quilted yarn, ultimately resulting in an uneven terry loop layout and chaotic weave structure on the fabric surface. This severely affects the fabric's quality and aesthetics, and also limits the application and development of terry knitting technology in high-end woolen fabrics.

[0004] Although existing computerized flat knitting machines are generally equipped with auxiliary pulling devices such as intelligent presser feet and sinkers for knitting pulling of ordinary tissues, there is still no mature and effective solution on how to apply them to solve the instability problem of the aforementioned specific terry knitting and how to coordinate them with the specific knitting steps of such special structures. Summary of the Invention

[0005] The present invention aims to provide a method for knitting terry fabrics on a computer flat knitting machine based on assisted tension, so as to solve the problems of unstable loop release, uneven loops, and poor needle latch closure in the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of the present invention is as follows:

[0007] A method for weaving terry fabrics using a computerized flat knitting machine based on assisted tension includes the following steps:

[0008] S1, Loop Formation Row Knitting: Loop needles on the front needle bed and the back needle bed participate in loop formation. One needle holds an old loop from the main body of the fabric in its hook, while the other needle is an empty needle or an auxiliary guide needle. The two needles (the terry needles on the front needle bed and the terry needles on the back needle bed) hook the terry yarn together to form a terry drape arc that protrudes to one side of the fabric.

[0009] S2, Loop fixed row knitting: Feed in the main yarn, so that the knitting needle holding the old loop can knit in loops, and the newly formed main loop passes through the old loop and the loop yarn, locking the root of the loop yarn into the fabric body;

[0010] S3, Pressing Assisted Loop Release: After the loop fixing step, the auxiliary pulling device is called to apply pressing pressure to the loop hanging arc, so that it is taut and close to the needle bar of the needle to be released. Then, the needle to be released is driven to release the loop, so that the loop yarn is released from the needle and the loop forming is completed.

[0011] Preferably, the auxiliary pulling device is a presser foot device, and the pressing force is applied to the loop suspension arc by the presser foot's presser needle.

[0012] As another preferred option, the auxiliary pulling device is a sinker device; before performing the pressing-assisted loop removal step, the relative lateral movement (fork position) of the front and rear needle beds is controlled first, and then the throat of the sinker cuts into and presses down on the loop, and then the loop removal is performed.

[0013] Preferably, during the terry loop fixing knitting step, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the knitting process.

[0014] The present invention also provides a method for knitting loops on the right side of a single-sided weft knitted fabric, comprising the following steps:

[0015] S1, Main fabric knitting: Knitting the main fabric (ground structure) in single-sided plain weft knit on the back needle bed, while the needles on the front needle bed are in a resting state;

[0016] S2, Initialization of the terry area: In the area where terry loops need to be knitted, transfer the loop from the back terry needle to the front terry needle, so that the front terry needle obtains the main loop and the back terry needle becomes an empty needle.

[0017] S3, loop forming row knitting: feed in loop yarn, the front bed loop needle performs the hanging action, and the back bed loop needle performs the hooking action. The two needles hook the loop yarn together to form a loop hanging arc that bulges towards the front of the fabric.

[0018] S4, Loop fixed row knitting: Feed in the main yarn, the back bed terry needles rest, and the front bed terry needles knit in loops to lock the root of the terry yarn into the main body of the fabric.

[0019] S5, Press-assisted loop release: Activate the auxiliary pulling device to press the loop hanging arc, making it taut against the needle bar of the back bed loop needle, and then release the loop from the back bed loop needle, and the loop yarn is released from the back bed loop needle, completing the loop formation; during this process, the front bed loop needle is in a resting state (holding the newly formed main loop on it).

[0020] S6, Cycle and End: Repeat S3 to S5 to continuously knit the front terry loops; or, after returning the loops on the front terry loop needles to the back terry loop needles, resume the main fabric knitting of step S1.

[0021] Preferably, during the terry loop fixing knitting step, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the knitting process.

[0022] The present invention also provides a method for knitting loops on the reverse side of a single-sided weft knitted fabric, comprising the following steps:

[0023] S1, Main fabric knitting: Knitting the main fabric (ground structure) in single-sided plain weft knit on the back needle bed, while the needles on the front needle bed are in a resting state;

[0024] S2, loop forming row knitting: feed in loop yarn, the back bed loop needle performs the hanging action, the front bed loop needle performs the hooking action, the two needles together hook the loop yarn to form a loop hanging arc that bulges towards the reverse side of the fabric;

[0025] S3, Loop Fixed Row Knitting: Feed in the main yarn, the front bed terry needles rest, and the rear bed terry needles perform loop knitting to lock the root of the terry yarn into the main body of the fabric.

[0026] S4, Press-assisted loop release: Activate the auxiliary pulling device to press the loop suspension arc, making it taut against the needle bar of the front bed loop needle, and then release the loop from the front bed loop needle, and the loop yarn is released from the front bed loop needle to complete the loop formation; during this process, the rear bed loop needle is in a resting state (holding the newly formed main loop on it).

[0027] S5, Cycle and End: Repeat S2 to S4 to continuously weave the reverse loops; or, resume the main fabric weaving of step S1.

[0028] Preferably, during the terry loop fixing knitting step, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the knitting process.

[0029] The present invention also provides a method for alternately knitting front and back loops on a weft-knitted fabric, alternately performing S3 to S5 in the above-mentioned front loop method and S2 to S4 in the above-mentioned back loop method, and performing a loop transfer operation each time the loop direction is switched, so that the loop on the needle currently holding the main loop is transferred to the corresponding needle on another needle bed.

[0030] This invention also provides a method for weaving loops on a sesame dot jacquard fabric (double-sided weave structure, a conventional fabric in the industry), comprising the following steps:

[0031] S1, Main fabric weaving: The A and B needles of the back needle bed, as well as all the needles of the front needle bed, are used to weave the main fabric (ground structure) according to the sesame dot jacquard process; wherein, the A needles and B needles are arranged alternately at 1-1 along the direction of the needle bed.

[0032] S2, Initialization of the terry area: In the area where terry loops need to be knitted, transfer the loops from the front terry needle to the back terry needle. The front terry needle becomes an empty needle, and the back terry needle simultaneously holds the original loop and the transferred loop.

[0033] S3, Loop Formation Knitting: Feed in yarn of color A, the back terry needles perform the hanging action, and the front terry needles perform the hooking action. The two needles together hook the yarn of color A to form a terry loop hanging arc that protrudes towards the front of the fabric; at the same time, the A needles on the back needle bed that are not involved in terry knitting perform loop knitting.

[0034] S4, Loop Fixed Row Knitting: Feed in B-color yarn, the front bed terry needles rest, and the back bed terry needles knit in loops, locking the root of the loops into the fabric body; at the same time, the B needles on the back needle bed and the front bed needles on the front needle bed knit in loops.

[0035] S5, Press Assisted Loop Release: Activate the auxiliary pulling device to press the terry loop suspension arc, making it taut against the needle bar of the front bed terry needle, and then release the front bed terry needle, with color A yarn (i.e. terry yarn) leaving the front bed terry needle; during this process, the rear bed terry needle is in a resting state (with the newly formed main loop remaining on it).

[0036] S6, Cycle and End: Repeat S3 to S5 to continuously weave loops; or, resume weaving the main fabric from step S1.

[0037] Preferably, during the terry loop fixing knitting step, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the knitting process.

[0038] In the methods described above, the yarn used to form the loops can be the same as or different in material, color, or type from the main yarn of the fabric. The yarn used to form the loops can be ordinary knitting yarn, or it can be a special knitting yarn such as mohair, sequined yarn, single-sided fleece, core-spun yarn, or quilted yarn.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. High stability of loop removal: By pressing the loop droop arc before loop removal, making it close to the needle bar, irregular floating of the loop is avoided during loop removal, ensuring normal closure of the needle tongue and smooth loop removal.

[0041] 2. Applicable to special yarns: This method uses an auxiliary pulling device to actively press the draped arc of the loop, making the loop taut and adhering to the needle bar to complete the loop release. It is not only applicable to knitting yarns such as cotton, wool, and acrylic, but also effective for special knitting yarns with high hairiness and elasticity such as mohair, sequin yarn, single edge fleece, core-spun yarn, and quilted bead yarn, thus broadening the range of applicable materials for computer flat knitting machines to produce terry fabrics.

[0042] 3. High weaving efficiency: When continuously weaving loops in the same direction, there is no need to repeatedly move loops, reducing idle travel and improving production efficiency.

[0043] 4. Rich patterns: Terry patterns can be created on various main fabrics (ground weaves) with front, back, or alternating front and back patterns, and can be combined with two-color or multi-color yarns to form terry fabrics with strong three-dimensionality and rich colors.

[0044] 5. Good device compatibility: It can use the presser foot device commonly equipped on existing computerized flat knitting machines, as well as the sinker device, without increasing the cost of modification. Attached Figure Description

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0046] Figures 1 to 5 This is a schematic diagram of the knitting process for Example 1 (front terry);

[0047] Figures 6 to 9 This is a schematic diagram of the knitting process for Example 2 (reverse terry cloth);

[0048] Figures 10 to 15 This is a schematic diagram of the weaving process for Example 4 (double-sided, two-color terry cloth);

[0049] Figure 16 A schematic diagram illustrating the relative lateral movement (commonly known as "fork position") between the front and rear needle beds;

[0050] Figure 17 This is a schematic diagram illustrating the effect of Example 1 (front view terry cloth);

[0051] Figure 18 This is a schematic diagram illustrating the effect of Example 2 (reverse terry cloth);

[0052] Figure 19 This is a schematic diagram illustrating the effect of Example 3 (alternating terry loops);

[0053] Figures 20 to 21 This is a schematic diagram of a multi-colored terry loop effect. Detailed Implementation

[0054] It should be noted that the continuous left and right movement of the knitting head in the weaving steps of each embodiment is only a preferred method for describing the weaving process of the embodiment. In the actual weaving process, the direction of movement of the knitting head, the stroke sequence, and the insertion of empty strokes (idle runs) can be appropriately adjusted according to the characteristics of the equipment, program logic, or process requirements. For example, one or more empty strokes can be interspersed in the continuous cycle without affecting the implementation of the core weaving method of this embodiment.

[0055] Furthermore, the knitting systems in all embodiments of the present invention are based on a symmetrical front and rear needle bed structure, and therefore can all be operated in a mirror manner. That is, the main fabric can be knitted on the front needle bed while the rear needle bed assists in loop formation, or vice versa, the front needle bed assists in loop formation while the rear needle bed knits the main fabric; correspondingly, the roles and needle bed numbers of the front and rear terry needles are synchronously interchanged, while the knitting principle remains unchanged.

[0056] Example 1: Knitting method of weft-flat terry fabric

[0057] This embodiment provides a method for forming a partial loop pattern on the front side of a single-sided plain knit fabric. For ease of description, this embodiment defines the front side of the fabric as the cylindrical surface of the loops in the plain knit fabric, that is, the side corresponding to the back needle bed, and the loops ultimately convex towards this surface.

[0058] Combination Figures 1 to 5 As shown, the knitting system includes a front needle bed 1, a back needle bed 2, and a presser foot device. The front needle bed 1 has a number of front needles (marked 25), and the back needle bed 2 has a number of back needles (marked 35). In areas where terry loops are to be knitted, some of the front needles on the front needle bed 1 are selected as front terry loop needles (marked 450), while the remaining front needles not involved in terry loop knitting retain their original marking 25. Similarly, some of the back needles on the back needle bed 2 are selected as back terry loop needles (marked 400), while the remaining back needles not involved in terry loop knitting retain their original marking 35.

[0059] The weaving steps are as follows:

[0060] S1.1, Main fabric weaving

[0061] The knitting head moves to the left, the yarn guide feeds in the main yarn (gray), and all needles (35 and 400) on the back needle bed 2 knit in plain weft stitch to form the main fabric. The back bed terry needles 400 participate in knitting as regular back bed needles before knitting the terry section. At this time, all needles on the front needle bed 1 (25 and 450) are in a resting state and do not participate in the main fabric knitting (e.g., ...). Figure 1 (As shown).

[0062] S1.2 Initialization of the terry loop area

[0063] In the area where terry loops need to be knitted, move the machine head to the right, and transfer the loop held by the back terry needle 400 to the front terry needle 450, which was originally resting, directly opposite the front needle bed 1 (at this time, the front and back needle beds are in a needle-matching position). Figure 2 (As shown). After the transfer is completed, the terry needle 400 on the back bed becomes an empty needle.

[0064] S1.3, Loop weaving (tuck weaving).

[0065] The machine head moves to the left, feeding in terry yarn (red). The front terry needle 450 performs the hanging action, and the rear terry needle 400 performs the hooking action. Both needles work together to hook the terry yarn, forming a terry drape arc that bulges towards the front of the fabric (rear needle bed side). Figure 3 (As shown). Back bed needles 35 and front bed needles 25, which were not involved in terry knitting, remained rested.

[0066] At this point: the front terry needle 450 performs a hooking action—it only hooks the terry yarn without unhooking it, and the newly hooked terry yarn is held together with the existing main loop within the hook. The back terry needle 400, although an empty needle, still hooks the same terry yarn as the front needle, acting as an auxiliary guide needle, only hooking and guiding the terry yarn without forming a loop itself. Through these actions, the terry yarn forms a drooping arc protruding towards the front of the fabric (back needle bed side) between the front terry needle 450 and the back terry needle 400, thus forming the basic shape of a terry loop (as shown in the image). Figure 3 (As shown).

[0067] As an alternative implementation, the back knitting needle 35 can also hook terry yarn to participate in the knitting. This operation itself does not affect the formation of the terry loop, but only creates a knitting extension on both sides of the terry row. If the terry yarn is a different color from the main yarn, the knitting row constitutes a patterned row; if the terry yarn is the same color as the main yarn, the knitting row is integrated with the main fabric and there is no difference in pattern appearance.

[0068] S1.4, Loop fixed row knitting.

[0069] The machine head moves to the right, feeding in the main yarn. The back bed needles 35 and the front bed terry needles 450 perform loop knitting, while the back bed terry needles 400 do not participate in knitting (remaining stationary, their hooks still holding the terry yarn); the front bed needles 25, which are not involved in terry knitting, remain at rest (e.g., ...). Figure 4 (As shown).

[0070] In this process, the back bed needle 35 performs normal plain weft knitting, continuing the main fabric. The front bed terry needle 450 performs normal loop knitting: the needle first rises and unrolls, allowing the existing main body loops and terry yarns inside the needle hook to slide onto the needle bar; then the needle descends to hook the newly fed main body yarn to form a new loop, which passes through the old main body loops and terry yarns that have slid onto the needle bar, locking them into the fabric, thereby firmly fixing the root of the terry yarn into the main fabric body.

[0071] As another implementation, during the terry loop weaving process, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the weaving.

[0072] S1.5, Press to assist in uncoiling

[0073] The machine head moves to the left, and the auxiliary traction device (taking the presser foot device as an example in this embodiment) is synchronously activated through the electronic control program. This causes the presser needle 600 to apply a downward pressing force to the loop in the loop area, making the loop taut and adhered to the needle bar of the back bed loop needle 400 (e.g., Figure 5 (As shown).

[0074] Subsequently, the back bed terry needle 400 is driven by the machine head: it first rises to the loop-off height, then descends to reset, completing the loop-off action. Due to the pressing action of the pressure needle 600, the terry yarn is held down and cannot retract with the needle as it rises, thus smoothly sliding out of the hook of the back bed terry needle 400. After the loop-off is completed, the back bed terry needle 400 returns to an empty needle state.

[0075] During this process, the front bed terry needle 450 and all other needles not involved in terry knitting remain in a non-knitting state (floating yarn), and the original loops (if any) inside their hooks remain unchanged. The presser foot device assists in pressing to ensure the smooth release of loops from the back bed terry needle 400 and the integrity of the terry shape.

[0076] S1.6, Loop and End

[0077] (a) Continuous terry knitting cycle

[0078] When continuous terry loop knitting is required (i.e., after the previous round S1.5, a main loop is held on the front bed terry needle 450), repeat steps S1.3 to S1.5:

[0079] S1.3: The front bed terry needle 450 (with main loop) performs the hanging eye action, and the rear bed terry needle 400 (empty needle) performs the hooking action to form the terry loop shape;

[0080] S1.4: Knit in loops using 450 needles on the front bed to secure the root of the loop and form a new main loop;

[0081] S1.5: Back bed terry needle 400 removes loop and restores empty needle; front bed terry needle 450 maintains new main body loop.

[0082] The above cycle can be repeated multiple times without executing the S1.2 loop shifting step. It should be noted that after each round of S1.5, the machine head is on the left; however, S1.3 requires the machine head to move to the left. Therefore, in continuous cycles, an empty stroke (no yarn feeding, no weaving) to the right needs to be added after S1.5 to reset the machine head to the right before executing the next round of S1.3. In actual weaving, the direction of machine head movement and the insertion of the empty stroke can be appropriately adjusted according to equipment characteristics or program logic (e.g., machine head participation in weaving, the number of cam systems, etc.), without affecting the implementation of the core method of this embodiment.

[0083] (ii) First time or resumption of knitting terry loops

[0084] In the following cases, S1.2 (shifting the circle) must be executed first:

[0085] 1) When first knitting terry loops using a basic weft knit structure;

[0086] 2) When the terry loop knitting is interrupted (e.g., the return operation of S1.6 has been completed) and needs to be restarted.

[0087] At this point, execute steps S1.2 to S1.5 sequentially to complete the first loop unit, and then repeat steps S1.3 to S1.5 as described in (a) above to continue knitting.

[0088] (III) End of terry knitting

[0089] Once the predetermined terry loop pattern is completed, perform the reverse of step S1.2, transferring the loops from the front terry needle 450 back to the back terry needle 400, restoring the front terry needle 450 to an empty needle state. Subsequently, the back terry needle 400 participates in regular stockinette stitch knitting, while the front terry needle 450 remains in a resting state, resuming regular stockinette stitch knitting on the back needle bed 2.

[0090] In this embodiment, the loops are ultimately presented on the front side of the fabric (e.g., Figure 17 (As shown). In the weaving cycle starting from the initial loop transfer, steps S1.3 to S1.5 are repeated. The synchronous action of the auxiliary pulling device is the key to ensuring stable cycle and clear loop release.

[0091] Example 2: Weaving method for weft-flat reverse terry fabric

[0092] This embodiment provides a method for forming loops on the reverse side of a single-sided weft knitted fabric. Combined with... Figures 6 to 9The knitting system includes a front needle bed 1, a back needle bed 2, and a presser foot device. The front needle bed 1 has a number of front needles (marked 25), and the back needle bed 2 has a number of back needles (marked 35). In areas where terry loops are to be knitted, some of the front needles on the front needle bed 1 are selected as front terry loop needles (marked 500), while the remaining front needles not involved in terry loop knitting retain their original marking 25. Similarly, some of the back needles on the back needle bed 2 are selected as back terry loop needles (marked 550), while the remaining back needles not involved in terry loop knitting retain their original marking 35.

[0093] The weaving steps are as follows:

[0094] S2.1, Main fabric weaving

[0095] The knitting head moves to the right, the yarn guide feeds in the main yarn (gray), and all needles (35 and 550) on the back needle bed 2 knit in plain weft stitch to form the main fabric. The terry needles 550 on the back bed participate in knitting as regular back needles before knitting the terry section. At this time, all needles (25 and 500) on the front needle bed 1 are in a resting state and do not participate in the main fabric knitting (e.g., ...). Figure 6 (As shown).

[0096] S2.2, Terry loop knitting (twill knitting)

[0097] The machine head moves to the left, feeding in terry yarn (blue). The rear terry needle 550 performs a hooking action, and the front terry needle 500 performs a yarn-hooking action. Both needles together hook the terry yarn, forming a terry drape arc that bulges towards the reverse side of the fabric (front needle bed side). Figure 7 (As shown). Back bed needles 35 and front bed needles 25, which were not involved in terry knitting, remained rested.

[0098] At this point: the back terry needle 550 performs a hooking action—it only hooks the terry yarn without unhooking it, and the newly hooked terry yarn is held together with the existing main loop within the hook; the front terry needle 500, although an empty needle, still hooks the same terry yarn as the former, acting as an auxiliary guide needle, only hooking and guiding the terry yarn without forming a loop itself. Through the above actions, the terry yarn forms a drooping arc protruding towards the reverse side of the fabric (front needle bed side) between the front terry needle 500 and the back terry needle 550, thus forming the basic shape of the terry (as shown in the image). Figure 7 (As shown).

[0099] Similarly, as another implementation, the back knitting needle 35 can also hook terry yarn to participate in the knitting. This operation itself does not affect the formation of the terry loop, but only creates a knitting extension on both sides of the terry row. If the terry yarn is a different color from the main yarn, the knitting row constitutes a patterned row; if the terry yarn is the same color as the main yarn, the knitting row is integrated with the main fabric and there is no difference in pattern in appearance.

[0100] S2.3, Loop fixed row knitting

[0101] The machine head moves to the right, feeding in the main yarn. The back bed knitting needles 35 and terry needles 550 begin knitting, while the front bed terry needles 500 do not participate in knitting (remaining stationary, their hooks still holding the terry yarn); the front bed needles 25, which are not involved in terry knitting, remain idle (e.g., ...). Figure 8 (As shown).

[0102] In this process, back bed needle 35 performs normal plain weft knitting, continuing the main fabric. Back bed terry needle 550 performs normal loop knitting: this needle first rises and unrolls, allowing the existing main body loops and terry yarns inside the needle hook to slide onto the needle bar; then it descends to hook the newly fed main body yarn to form a new loop, the new loop passes through the old main body loops and terry yarns that have slid onto the needle bar, locking them into the fabric, thereby firmly fixing the root of the terry yarn into the main fabric body.

[0103] As another implementation, during the terry loop weaving process, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the weaving.

[0104] S2.4, Press to assist in uncoiling

[0105] The machine head moves to the left, and the auxiliary traction device (taking the presser foot device as an example in this embodiment) is synchronously activated through the electronic control program. This causes the presser needle 600 to apply a downward pressing force to the loop in the loop area, making the loop taut and adhered to the needle bar of the front bed loop needle 500 (e.g., Figure 9 (As shown).

[0106] Subsequently, the front terry needle 500 is driven by the knitting head: it first rises to the loop-off height, then descends to reset, completing the loop-off action. Due to the pressing action of the pressure needle 600, the terry yarn is held down and cannot retract with the needle as it rises, thus smoothly sliding out of the hook of the front terry needle 500. After the loop-off is completed, the front terry needle 500 returns to an empty needle state.

[0107] During this process, the back bed terry needle 550 and all other needles not involved in terry knitting remain in a non-knitting state (floating yarn), and the original loops (if any) inside their hooks remain unchanged. The presser foot device assists in pressing to ensure the smooth release of loops from the front bed terry needle 500 and the integrity of the terry shape.

[0108] S2.5, Loop and End.

[0109] (a) Continuous terry knitting cycle

[0110] When continuous knitting of the reverse side of the terry loop is required (i.e., after the previous round of S2.4, a main loop is held on the back terry needle 550, and the front terry needle 500 is empty), repeat steps S2.2 to S2.4:

[0111] S2.2: The back bed terry needle 550 (with main loop) performs the hanging eye action, and the front bed terry needle 500 (empty needle) performs the hooking action to form the terry loop shape;

[0112] S2.3: Knit in loops using 550 needles on the back bed, securing the root of the loop and forming a new main loop;

[0113] S2.4: The front bed terry needle 500 removes the loop and restores the empty needle, the back bed terry needle 550 maintains the new main body loop.

[0114] The above cycle can be repeated multiple times without additional initialization steps. It should be noted that after each round of S2.4, the knitting head is on the left, while S2.2 requires the knitting head to move to the left. Therefore, in continuous cycles, a rightward idle stroke (no yarn feeding, no weaving) needs to be added after S2.4 to reset the knitting head to the right before executing the next round of S2.2. In actual weaving, the direction of knitting head movement and the insertion of the idle stroke can be appropriately adjusted according to equipment characteristics or program logic (e.g., the knitting head participating in weaving, the number of cam systems, etc.), without affecting the implementation of the core method of this embodiment.

[0115] (II) End of terry knitting

[0116] Once the planned reverse terry pattern is completed, since the main loop is already held on the back terry needle 550, regular plain knitting can be continued directly on the back needle bed 2. The front terry needle 500 remains in a resting state, without the need for additional loop transfer operations.

[0117] In this embodiment, the loops are presented on the reverse side of the fabric (e.g., Figure 18 (As shown). The process does not require an initial transfer step and can directly begin the terry loop cycle on the needle bed where the structure is formed. Within the cycle, the front bed terry needles 500 only participate in the loop forming row, rest in the fixed row, and complete the loop removal in the loop removal row; the rear bed terry needles 550 are responsible for knitting and fixing in the fixed row and continue the main structure.

[0118] Example 3: Weaving method for weft-flat double-sided terry fabric

[0119] This embodiment provides a method for alternately forming loops on both the front and back sides of the same fabric area, which is a combination and alternating application of the methods described in Embodiment 1 and Embodiment 2. By alternately executing the front loop unit and the back loop unit, the loops are alternately convex to the front (back needle bed side) and back (front needle bed side) sides of the fabric, forming a double-sided three-dimensional loop pattern.

[0120] Initial state description

[0121] Before beginning double-sided terry knitting, the main fabric has been knitted using a standard plain weft knit base structure (refer to S1.1 of Example 1). At this point, all main loops are located on the needles of the back needle bed, while all needles of the front needle bed are empty. Specifically, in the terry knitting area, the main loops are held on the terry needles of the back bed (marked 400 / 550), while there are no loops on the terry needles of the front bed (marked 450 / 500).

[0122] Knitting steps:

[0123] (a) Execution of the front terry loop unit

[0124] If loops are to be formed on the front side of the fabric, loop area initialization must first be performed (refer to S1.2 of Example 1), the main loop on the back bed loop needle is transferred to the front bed loop needle, so that the front bed loop needle obtains the old loop and the back bed loop needle becomes an empty needle.

[0125] Subsequently, the front terry loop unit is executed in a continuous loop manner as described in Example 1. A complete front terry loop unit includes:

[0126] S1.3 (Terry loop formation): The front terry loop needle (with loop) performs the hanging action, and the rear terry loop needle (empty needle) performs the hooking action to form the terry loop shape;

[0127] S1.4 (Terry loop fixing row): The terry loop is formed by the front bed needles, fixing the root of the terry loop and forming a new main loop;

[0128] S1.5 (Press to assist in unwinding): The back terry needles unwind and return to empty needles; the front terry needles retain the new main loop.

[0129] The above unit can be repeated multiple times as needed (i.e., continuous front-side loops). In continuous cycles, there is no need to repeat the S1.2 loop transfer, because at the end of each round S1.5, the front bed loop needles have already grasped the new main body loop and can directly enter the next round S1.3.

[0130] (ii) Knitting needle status at the end of the front terry loop unit

[0131] After stopping the front terry loop (i.e., completing the last round S1.5), the needle state is as follows: the front terry loop needles hold one main loop; the back terry loop needles are empty.

[0132] (iii) Switch to the reverse side of the terry cloth

[0133] Because the reverse terry loop requires the back terry needle to hold the main coil and the front terry needle to be empty (refer to the initial conditions in Example 2), a loop transfer operation (terry loop area initialization) is required: the coil on the front terry needle is transferred back to the back terry needle (opposite to S1.2). After the loop transfer, the state meets the initial requirements of the reverse terry loop: the back terry needle has a coil, and the front terry needle is empty.

[0134] (iv) Execution of the reverse terry loop unit

[0135] Subsequently, the reverse terry loop unit is executed in a continuous cycle as described in Example 2. A complete reverse terry loop unit includes:

[0136] S2.2 (Terry loop formation): The back terry needle (with loops) performs the hanging action, and the front terry needle (empty needle) performs the hooking action to form the terry loop shape;

[0137] S2.3 (Terry loop fixing row): The terry loop is formed by the back bed needles, fixing the root of the terry loop and forming a new main loop;

[0138] S2.4 (Press-assisted loop release): The front bed terry needles release the loop and return to empty needles; the rear bed terry needles maintain the new main body loop.

[0139] The above unit can be repeated multiple times as needed (i.e., continuous reverse loops). During continuous cycles, there is no need to move the loops again because the back bed loop needles have already held the new main loop at the end of each round S2.4.

[0140] (v) The state of the knitting needles at the end of the reverse terry loop unit

[0141] After stopping the reverse terry loop (i.e., completing the last round S2.4), the needle state is as follows: the back terry loop needle holds one main loop, and the front terry loop needle is empty.

[0142] (vi) Switch back to the front terry cloth.

[0143] If it is necessary to form loops on the right side of the fabric again after completing the loops on the wrong side, perform the loop transfer (loop area initialization) operation: move the main loop currently held on the back terry needle back to the front terry needle (same as S1.2). After the loop transfer, the state is restored to: the front terry needle has a loop, and the back terry needle is empty. Then, the right side loop unit can be executed in the manner described in (a) above (Note: since the front needle already has a loop after the loop transfer, there is no need to execute S1.2 again, and you can directly proceed to S1.3).

[0144] (vii) Alternating Cyclic Control

[0145] The electronic control program controls the front and back terry loop units to alternate a preset number of times. Each time a direction switch is completed, a corresponding loop shifting operation must be performed. The basic alternation logic is as follows:

[0146] Start (after basic weave): Perform one loop transfer (S1.2) → Perform the right-side terry loop unit (S1.3~S1.5) → Status: Front needle has loops;

[0147] Switch to reverse side: Perform loop transfer (front needle → back needle) → Perform reverse side loop unit (S2.2~S2.4) → Status: Back needle has loop;

[0148] Switch back to the right side: Perform a loop transfer (back needle → front needle) → Perform the right side terry loop unit (S1.3~S1.5, S1.2 not required) → Status: Front needle has a loop;

[0149] And so on.

[0150] The possible alternation patterns include, but are not limited to:

[0151] 1) After each front terry unit (single row) is completed, immediately switch to a back terry unit (single row) to form an alternating fabric of "one front terry + one back terry".

[0152] 2) After completing multiple consecutive front terry units, switch to multiple consecutive back terry units to form a wide stripe alternating pattern.

[0153] (viii) Calling up the auxiliary traction device

[0154] Whether it's the front or back of the loop, in each loop-removing row (S1.5 or S2.4), the auxiliary pulling device (presser foot device) must be used simultaneously to press the loop to ensure smooth loop removal and the integrity of the loop shape.

[0155] (ix) End of weaving

[0156] Once all double-sided terry patterns are knitted, perform a loop transfer operation (if the current loop is on the front terry needle, transfer it back to the back terry needle), and then resume regular plain knitting on the back needle bed.

[0157] The method in this embodiment can flexibly generate alternating patterns of "one row of front, one row of back" (e.g., Figure 19 As shown, both the terry yarn and the main yarn of the fabric are red yarn, or a wide stripe alternating pattern, which enriches the appearance of the knitted fabric.

[0158] Example 4: Method for weaving loops on double-sided fabric (sesame dot jacquard fabric)

[0159] This embodiment provides a method for forming a terry loop pattern on the back side (the side opposite to the sesame loops) of a sesame-dot jacquard fabric. For ease of description, this embodiment defines: the right side of the fabric is the front needle bed side (pattern side), and the terry loops ultimately convex towards this side; the wrong side of the fabric is the back needle bed side (sesame-dot side).

[0160] Combination Figures 10 to 15 The knitting system includes a front needle bed 1, a rear needle bed 2, and a presser foot device. The front needle bed 1 is equipped with several front needles (marked as 100), and the rear needle bed 2 is equipped with A needles (marked as 200) and B needles (marked as 300). The two are arranged alternately along the needle bed direction, i.e., they are cyclically distributed along the needle bed direction in the manner of 200, 300, 200, 300...

[0161] In the area where terry loops are to be knitted, some of the front needles on the front needle bed 1 are selected as front terry loop needles (marked as 800), while the remaining front needles that are not involved in terry loop knitting retain their original markings of 100; some needles on the back needle bed 2 are selected as back terry loop needles (marked as 850), while the remaining back needles that are not involved in terry loop knitting retain their original markings (300, 200).

[0162] Initial state (main fabric weaving)

[0163] The main fabric (sesame dot jacquard fabric, a standard industry fabric) is knitted using the sesame dot jacquard technique. At this stage, all needles (including 800 and 850) on both the front and back needle beds hold the main loops. The loops held on the back bed terry needles 850 are the same color as the needle color (e.g., if selected from needle B, then the loops are color B). Figure 10 (As shown).

[0164] Knitting steps:

[0165] S4.1 Initialization of the terry loop area

[0166] In the area where terry loops need to be knitted, move the machine head to the right, and transfer the loop held by the front terry needle 800 onto the back terry needle 850, which is directly opposite the front needle bed 1 (at this time, the front and back needle beds are in a tucked position). Figure 11 As shown), after the transfer is completed, the front terry needle 800 becomes an empty needle, while the back terry needle 850 simultaneously holds its original main loop and the loop transferred from the front needle (as shown). Figure 12 (As shown).

[0167] S4.2, Terry loop knitting (twill knitting)

[0168] The machine head moves to the left, feeding in color A yarn (yellow). The back terry needle 850 performs the hanging action, and the front terry needle 800 performs the hooking action. Both needles together hook the color A yarn, forming a terry loop drape arc that protrudes towards the front of the fabric (front needle bed side). Figure 13 (As shown). Meanwhile, needles A 200 on the back needle bed 2 that are not involved in terry knitting perform normal loop knitting to continue the main fabric. Needles B 300 and front bed needles 100 that are not involved in terry knitting remain resting.

[0169] At this time: the back terry needle 850 performs the hanging eye action - only hooks the A color yarn but does not unravel; the front terry needle 800, although it is an empty needle, still hooks the same yarn together with the back terry needle 850, serving as an auxiliary guide needle, and does not form a loop on its own.

[0170] Through the above actions, the A-colored yarn forms a drooping arc protruding towards the front of the fabric (front needle bed side) between the front terry needle 800 and the back terry needle 850, constituting the terry loop shape (as shown). Figure 13 (As shown).

[0171] S4.3, Loop fixed row knitting

[0172] The machine head moves to the right, feeding in color B yarn (red). The back bed terry needles 850, the B needles 300 on the back needle bed 2, and the front bed needles 100 on the front needle bed 1 that are not involved in terry knitting begin knitting in loops. The front bed terry needles 800 do not participate in knitting (remaining stationary, their needle hooks still holding the terry yarn). The A needles 200 that are not involved in terry knitting remain at rest (as shown). Figure 14 (As shown).

[0173] in:

[0174] The back bed terry needle 850 performs normal loop knitting: the needle first rises and unhooks, allowing the original old main body loop (including overlapping loops) and terry yarn inside the needle hook to slide onto the needle bar; then it descends to hook the newly fed B-color yarn to form a new loop, the new loop passes through the old main body loop and A-color yarn that have slid onto the needle bar, locking the two into the fabric, thereby firmly fixing the root of the A-color yarn (i.e., the terry yarn) into the main body of the fabric.

[0175] Using needle B (300mm) and front bed needles (100mm) that are not involved in terry knitting, take yarn B and knit normally.

[0176] As another implementation, during the terry loop weaving process, a presser foot device can be used to press the loops, which helps to unwind old loops and form new loops, thus stabilizing the weaving.

[0177] S4.4, Press to assist in uncoiling

[0178] The machine head moves to the left, and the auxiliary traction device (taking the presser foot device as an example in this embodiment) is synchronously activated through the electronic control program. This causes the presser needle 600 to apply a downward pressing force to the loop in the loop area, making the loop taut and pressed against the needle bar of the front bed loop needle 800 (e.g., Figure 15 (As shown).

[0179] Subsequently, the front terry needle 800 is driven by the knitting head: it first rises to the loop-off height, then descends to reset, completing the loop-off action. Due to the pressing action of the pressure needle 600, the A-color yarn is held down and cannot retract with the needle as it rises, thus smoothly sliding out of the hook of the front terry needle 800. After the loop-off is completed, the front terry needle 800 returns to the empty needle state.

[0180] During this process, the back terry needle 850 and all other needles not involved in terry knitting remain in a non-knitting state (floating yarn), and the original loops (if any) inside their hooks remain unchanged (e.g. Figure 15 (As shown). With the assistance of the presser foot device, the tissue coils on the front and rear needle beds are appropriately tightened, ensuring the smooth release of the terry loop needles 800 on the front bed and the integrity of the loop shape.

[0181] S4.5, Loop and End

[0182] (a) Continuous terry knitting cycle

[0183] When continuous knitting of the right side terry loop is required (i.e., after the previous round of S4.4, a new main loop is held on the back terry needle 850, and the front terry needle 800 is empty), repeat steps S4.2 to S4.4:

[0184] S4.2: The back bed terry needle 850 (with main loop) performs the hanging action, and the front bed terry needle 800 (empty needle) performs the hooking action to form the terry loop shape;

[0185] S4.3: Knit in loops using 850 needles on the back bed, securing the root of the loop and forming a new main loop;

[0186] S4.4: The front bed terry needle 800 removes the loop and restores the empty needle, the back bed terry needle 850 maintains the new main body loop.

[0187] The above cycle can be repeated multiple times without repeating the S4.1 loop shifting step. It should be noted that after each round of S4.4, the machine head is on the left, while S4.2 requires the machine head to move to the left. Therefore, in continuous cycles, an empty stroke to the right (no yarn feeding, no weaving) needs to be added after S4.4 to reset the machine head to the right before executing the next round of S4.2. In actual weaving, the direction of machine head movement and the insertion of the empty stroke can be appropriately adjusted according to equipment characteristics or program logic (e.g., machine head participation in weaving, the number of cam systems, etc.), without affecting the implementation of the core method of this embodiment.

[0188] (ii) First time or resumption of knitting terry loops

[0189] The following situations require S4.1 (shifting circles) to be executed first:

[0190] 1) When first starting to knit loops from the main fabric;

[0191] 2) When terry knitting needs to be restarted after it has been interrupted (e.g., the terry knitting has been completed and the main fabric has been restored).

[0192] At this point, execute steps S4.1 to S4.4 sequentially to complete the first loop unit, and then repeat steps S4.2 to S4.4 as described in (a) above to perform continuous loop knitting.

[0193] (III) End of terry knitting

[0194] Once the predetermined terry pattern is completed, resume knitting the main fabric. At this point, the main loop (from the B-color loop of the last round S4.3) held on the back bed terry needles 850 can continue to participate in subsequent knitting as part of the main fabric.

[0195] This example uses two colors (A, B) as an example (the effect is as follows). Figure 20 (As shown), but not limited to two colors. In single-color knitting, all back needles use the same color yarn, and the main body of the fabric is double-sided single-color plain knit. In multi-color knitting (the effect is as shown...),... Figure 21 As shown, multiple colored yarns can be introduced using a skip-needle method, and one or more of them can be selected to participate in the formation of the loop. Alternatively, multiple decorative yarns can be fed directly into the loop area without participating in the weaving of the main fabric, thus achieving a purely decorative loop pattern.

[0196] Regarding the use of the auxiliary traction device

[0197] The above embodiments are all described using a presser foot device (such as the slide-type presser ring device for computerized flat knitting machines disclosed in patent announcement number CN101603238B) as an auxiliary pulling method. It is understood that the knitting method of the present invention is also applicable to computerized flat knitting machines equipped with a settling sheet device.

[0198] When using a sinker instead of a presser foot, the core knitting logic remains unchanged. The difference lies in the fact that before performing the loop-off step (i.e., the position where the presser foot would normally be pressed), it is necessary to control the relative lateral movement of the front and rear needle beds (commonly known as "crossing"), such as... Figure 16 As shown, the looped yarn suspended between the front and rear needle beds is moderately taut so that the throat of the sinker can accurately cut into the yarn and press it down. Then, while the sinker remains pressed down, the needles perform a loop-freeing action, thus achieving the same auxiliary loop-freeing effect as the presser foot.

[0199] It should be emphasized that both the presser foot and the sinker plate are existing devices and tools for achieving the "pressing and pulling" function in this invention. Regardless of the device used, the core of this invention lies in the described terry weaving method itself.

[0200] The above embodiments do not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A method for knitting terry fabrics using a computerized flat knitting machine based on assisted tensioning, characterized in that, Includes the following steps: S1, Loop Formation Row Knitting: Loop needles on the front needle bed and the back needle bed participate in loop formation. One needle holds an old loop from the main body of the fabric in its hook, while the other needle is an empty needle or an auxiliary guide needle. The terry needles on the front and back needle beds hook the terry yarn together to form a terry drape arc that protrudes to one side of the fabric. S2, Loop Fixed Row Knitting: Feed in the main yarn, so that the knitting needle holding the old loop can perform loop knitting, and the newly formed main loop passes through the old loop and the loop yarn; S3, Press-assisted loop release: The auxiliary pulling device is activated to apply pressure to the loop drape arc, making it taut and close to the needle to be released. Then, the needle to be released is driven to release the loop, so that the loop yarn is released from the needle, and the loop formation is completed.

2. A method for knitting loops on the right side of a single-sided weft-knitted fabric, characterized in that, Includes the following steps: S1, Main fabric knitting: Knitting the main fabric in single-sided plain weft needles on the back needle bed, while the needles on the front needle bed are in a resting state; S2, Initialization of the terry area: In the area where terry loops need to be knitted, transfer the loop from the back terry needle to the front terry needle, so that the front terry needle obtains the main loop and the back terry needle becomes an empty needle. S3, Loop Formation Row Weaving: Feed in the loop yarn, the front bed loop needles perform the hanging action, and the back bed loop needles perform the hooking action. The front bed loop needles and the back bed loop needles hook the loop yarn together to form a loop hanging arc that bulges towards the front of the fabric. S4, fixed row knitting of terry yarn: feed in the main yarn, rest the terry needles on the back bed, and knit in loops on the terry needles on the front bed. S5, Press-assisted loop release: Activate the auxiliary pulling device to press the loop suspension arc, making it taut against the back bed loop needle, and then release the loop from the back bed loop needle, and the loop yarn is released from the back bed loop needle; during this process, the front bed loop needle is in a resting state. S6, Cycle and End: Repeat S3 to S5 to continuously knit the front terry loops; or, after returning the loops on the front terry loop needles to the back terry loop needles, resume the main fabric knitting of step S1.

3. A method for knitting loops on the reverse side of a single-sided weft-knitted fabric, characterized in that, Includes the following steps: S1, Main fabric knitting: Knitting the main fabric in single-sided plain weft needles on the back needle bed, while the needles on the front needle bed are in a resting state; S2, loop forming row weaving: feed in loop yarn, the back bed loop needles perform the hanging action, the front bed loop needles perform the hooking action, the back bed loop needles and the front bed loop needles together hook the loop yarn to form a loop hanging arc that bulges towards the reverse side of the fabric. S3, fixed row knitting of terry yarn: feed in the main yarn, rest the terry needles on the front bed, and knit in loops on the terry needles on the back bed; S4, Pressing Assisted Loop Release: Activate the auxiliary pulling device to press the loop suspension arc, making it taut against the front bed loop needle, and then release the loop from the front bed loop needle, and the loop yarn will detach from the front bed loop needle; during this process, the rear bed loop needle is in a resting state. S5, Cycle and End: Repeat S2 to S4 to continuously weave the reverse loops; or, resume the main fabric weaving of step S1.

4. A method for alternately knitting loops on both sides of a plain weft knit fabric, characterized in that, Alternately execute S3 to S5 of the method described in claim 2 and S2 to S4 of the method described in claim 3, and perform a loop transfer operation each time the loop direction is switched, so that the loop on the needle currently holding the main loop is moved to the corresponding needle on another needle bed.

5. A method for weaving loops on a sesame-dot jacquard fabric, characterized in that, Includes the following steps: S1, Main fabric weaving: The A and B needles of the back needle bed, as well as all the needles of the front needle bed, are used to weave the main fabric according to the sesame dot jacquard process; wherein, the A needles and B needles are arranged alternately along the needle bed direction at 1-1 intervals. S2, Initialization of the terry area: In the area where terry loops need to be knitted, transfer the loops from the front terry needle to the back terry needle. The front terry needle becomes an empty needle, and the back terry needle simultaneously holds the original loop and the transferred loop. S3, Loop Formation Knitting: Feed in yarn of color A, the back terry needles perform the hanging action, the front terry needles perform the hooking action, the back terry needles and the front terry needles together hook the yarn of color A to form a loop hanging arc that bulges towards the front of the fabric; at the same time, the A needles on the back needle bed that are not involved in the loop knitting perform loop knitting. S4, fixed row knitting of terry yarn: feed in B-color yarn, the front terry needles rest, and the back terry needles knit in loops; at the same time, the B needles on the back needle bed and the front needles on the front needle bed knit in loops. S5, Press Assisted Loop Release: Activate the auxiliary pulling device to press the loop suspension arc, making it taut against the front bed loop needle, and then release the front bed loop needle, with color A yarn leaving the front bed loop needle; during this process, the rear bed loop needle is in a resting state. S6, Cycle and End: Repeat S3 to S5 to continuously weave loops; or, resume weaving the main fabric from step S1.

6. The weaving method according to any one of claims 1 to 5, characterized in that: The yarn used to form terry loops may be the same as or different in material, color, or type from the main yarn of the fabric.

7. The weaving method according to any one of claims 1 to 5, characterized in that: The yarn used for forming terry loops is mohair, sequined yarn, single-sided fleece, core-spun yarn, or quilted yarn.

8. The weaving method according to any one of claims 1 to 5, characterized in that: The auxiliary pulling device is a presser foot device, and the pressing force is applied to the loop suspension arc by the presser foot.

9. The weaving method according to any one of claims 1 to 5, characterized in that: The auxiliary pulling device is a sinker plate device; before performing the pressing and assisting loop removal step, the front and rear needle beds are first controlled to move laterally, and then the throat of the sinker plate cuts into and presses down on the loop, and then the loop removal is performed.

10. The weaving method according to any one of claims 1 to 5, characterized in that: In the terry loop weaving step, the presser foot is used to press the loops.

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