An improved high-efficiency overlocking process for double-layer overlocking webbing on a shuttleless webbing machine

Abstract

This invention discloses an improved, efficient overlocking process for double-layer overlocked webbing on a shuttleless webbing machine. Specifically, it applies the weaving process of a velvet machine to this efficient overlocking process. By combining velvet machine overlocking technology and accessories, this process achieves efficient, high-quality velvet machine webbing production on a shuttleless webbing machine. The process includes the following steps: first, determining the number of warp threads to 382, ​​with two weft threads and two weft threads each, to ensure a stable basic structure for the webbing; second, accurately threading the required number of warp threads into each frame according to a pre-set threading diagram; then, designing a pre-stretching chain with 48 sections distributed across 18 frames to improve the overall stability and uniformity of the webbing; and finally, setting the weft density to ensure the webbing maintains softness while also maintaining good structural strength and wear resistance. Finally, using a velvet machine double-hole weft hook as the weft hook, combined with a conventional double weft hook that is balanced above and below, and modifying the overlocking technology, this achieves a tight and smooth overlocking process. This simplifies the alignment process, improves production efficiency, and reduces the product's market competitiveness.

Description

Technical Field

[0001] The invention relates to the field of textiles, and in particular to a high-efficiency edge-locking process for an improved double-layer edge-locking webbing on a shuttleless webbing machine. Background Art

[0002] The traditional Z10 double-weft, double-edge double-thread double-layer weaving process often suffers from complex alignment, inconsistent quality, and loose edge locks due to the front-to-back arrangement of the weft and side hooks. These issues not only affect production efficiency but also reduce product competitiveness. Therefore, simplifying the alignment process and improving webbing quality and edge locks have become urgent technical challenges in the weaving industry. Summary of the Invention

[0003] To address these issues, an improved, efficient overlocking process for double-layered webbing on a shuttleless webbing machine was proposed. Specifically, the webbing process used on a velvet loom was modified and applied to the shuttleless webbing machine. By optimizing the configuration of the weft and side hooks and the overlocking method, an efficient, top-to-bottom double-layer overlocking process was achieved, simplifying and increasing efficiency in the production of double-layered webbing, while also improving quality. This process involves the following steps:

[0004] 1. Raw material preparation: The number of warp threads is set to 320, with 62 root threads, 2 weft threads and 2 side threads, and 2 bud threads to ensure the stability of the basic structure of the ribbon.

[0005] 2. Yarn threading: Following the pre-set threading diagram, the required number of warp yarns is precisely threaded into each heald frame to ensure orderly yarn arrangement and lay a good foundation for subsequent weaving. There are 18 heald frames, and the first 1-4 frames are double-hole healds, with a wrapping thread threaded through each of the upper and lower healds. This meets the requirements of the double-layer structure of the webbing and reduces the number of heald frames and healds used in the fabric, minimizing damage to the yarn caused by the movement of the healds during the weaving process. Among them, the first box has 18 wires, the second box has 9 wires, the third and fourth boxes have 2 wires each, the fifth box has 13 wires, the sixth box has 14 wires, the seventh box has 26 wires, the eighth box has 30 wires, the ninth box has 44 wires, the tenth box has 48 wires, the eleventh box has 24 wires, the twelfth box has 26 wires, the thirteenth box has 24 wires, the fourteenth box has 24 wires, the fifteenth box has 9 wires, the sixteenth box has 8 wires, the seventeenth box has 16 wires, and the eighteenth box has 16 wires.

[0006] 3. Pre-chain loop design: According to the structural design of the webbing, the pre-chain has a total of 48 links, distributed in 18 heald frames. One circle of the pattern chain drum is set with 8 links. The arrangement of high, medium and low links is set to control the rise and fall of the yarn to form the corresponding pattern and structure.

[0007] 4. Weft density control: Set the weft density to 17.2 needles and the hoop grid specification to 10.5PC. The hoop grid includes the arrangement of the reed, which is arranged into multiple rows. The bud line is set on the outside of the first and last rows to ensure that the bud line will not be woven together with the warp.

[0008] 5. Accessories assembly: The double-hole side hook of the velvet machine is used as the overlock needle, combined with the double weft needle that is balanced up and down; the overlock needle and the weft needle are not on the same side; this structure can perform double-sided overlocking on both sides. When the weft needle and the hook needle are performing the overlocking operation, they will pass through the bud line, which not only fixes the overlock line to the edge of the ribbon, but also forms a lace effect through the interlacing of the bud line; the accessories assembly also includes a fixed block, a reed, a pressing handle and a needle seat. The fixed block can be assembled on the velvet machine and the shuttleless ribbon machine. The needle seat and the reed are designed on the fixed block and include the overlock needle and the weft needle. The pressing handle is designed on the weft needle to adjust the weft tension.

[0009] 6. Edge optimization: The edge optimization steps include adjusting the relevant parameters of the shuttleless webbing machine, pre-shrinking the webbing and edge reinforcement.

[0010] Parameter adjustments include: Warp tension: Adjust the warp tension to an appropriate range based on the material and thickness of the webbing, as well as the desired fabric density. Set it between 50 and 80 Newtons per strand to ensure a stable warp tension during weaving. Weft tension: Match the weft tension to the warp tension. Use the weft pressure handle to set the value slightly lower than the warp tension by 10 to 20 Newtons per strand to ensure fabric flatness and structural stability. Loom speed: Increasing the loom speed can improve production efficiency. For shuttleless looms, set the speed between 800 and 900 rpm. Weft insertion speed: Keep the weft insertion speed consistent with the loom speed.

[0011] The pre-shrinkage treatment is to lightly spray the yarn with steam or spray during the weaving process to make the fibers in the webbing expand and relax, thereby achieving the purpose of pre-shrinkage.

[0012] The edge reinforcement is a lock hem line that can be used as a line to reinforce the edge, and can also act as part of the weft line. The lock hem line and the weft line overlap, and two weft needles distributed on the left and right and two lock hem needles with double holes in the same distribution are used to achieve double-sided lock hems on both sides of the fabric.

[0013] Furthermore, an improved high-efficiency locking process for double-layer lock-edge webbing on a shuttleless webbing machine is provided. The webbing is a double-layer structure woven by a shuttleless webbing machine and has a double-layer lock-edge structure with a lace shape.

[0014] The beneficial effects of the present invention are as follows:

[0015] By combining the advantages of both shuttleless and velvet looms, the traditional Z10 weaving method and accessories are incorporated into the shuttleless loom. Modified parameter adjustment and edge-locking optimization procedures result in tighter and smoother edge locks, effectively resolving the complex alignment, unstable quality, and loose edge locks associated with the traditional weft hook and side hook weaving method, which typically uses a tandem arrangement. This significantly improves webbing quality. The simplified alignment process and optimized edge-locking technology significantly increase production efficiency. Furthermore, the accessory configuration simplifies operation, enhancing the overall flexibility and operability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the weaving process of the present invention;

[0017] Figure 2 This is a schematic diagram of the first chain cycle of the present invention;

[0018] Figure 3 This is a schematic diagram of the assembly of the edge-locking accessories of the present invention;

[0019] Figure 4 It is a schematic diagram of the double-layer webbing structure of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The improved velvet webbing high-efficiency overlocking process on a shuttleless webbing machine in this technical implementation plan achieves simplification, efficiency, and quality improvement in webbing production through a series of sophisticated steps and innovative configurations. The following is a detailed analysis of this process:

[0022] 1. Raw Materials Preparation

[0023] Warp Thread Count: 320 threads, determined by the desired width, density, and strength. Root Threads: 62 threads, used to enhance the webbing's structural stability and durability. Weft Threads: 2 threads each, interwoven with the warp threads to form the main body of the webbing, while the fringe threads are used for hemming and reinforcement. Bud Threads: 2 threads, used to create the lace effect during the hemming process.

[0024] 2. Threading the yarn

[0025] The heald frame is equipped with 18 heald frames. The first four frames use double-hole healds with a covering wire threaded on each side to meet the requirements of the double-layer structure of the webbing. By optimizing the threading method, the number of heald frames and healds is reduced, reducing damage to the yarn. The threading configuration is as follows: the first frame threads 18 wires, the second frame threads 9 wires, the third and fourth frames each thread 2 wires, the fifth frame threads 13 wires, the sixth frame threads 14 wires, the seventh frame threads 26 wires, the eighth frame threads 30 wires, the ninth frame threads 44 wires, the tenth frame threads 48 wires, the eleventh frame threads 24 wires, the twelfth frame threads 26 wires, the thirteenth frame threads 24 wires, the fourteenth frame threads 24 wires, the fifteenth frame threads 9 wires, the sixteenth frame threads 8 wires, the seventeenth frame threads 16 wires, and the eighteenth frame threads 16 wires.

[0026] 3. First chain loop design

[0027] There are 48 chain links in total, which are distributed in 18 heald frames. X is high chain, Δ is medium chain, and � is low chain. One circle of the flower chain drum requires 8 chain links to ensure that every 8 chain links form a complete cycle. The cycle of the flower chain drum is set to configure the chain links of each heald frame according to high, medium and low chains. The specific distribution example is as follows Figure 2 As shown in the figure, the rotation of the pattern chain drum causes the heald frames to rise and fall in a predetermined sequence, depending on the arrangement of the high, medium, and low chain links, thereby controlling the interweaving of the yarns. Because the chain links in each heald frame are arranged differently, the interweaving pattern of the yarns also changes with the rotation of the pattern chain drum, forming a continuous cycle and pattern.

[0028] 4. Weft density control

[0029] Weft density: set to 17.2 needles according to the density requirements of the ribbon.

[0030] Hoop grid specification: 10.5PC, through the reasonable arrangement of 26 reeds, to ensure the uniform distribution of weft in the weaving process. Figure 1 As shown, the bud lines are arranged in the 1st and 26th rows to prevent the bud lines from being woven into the main body of the ribbon.

[0031] 5. Accessory assembly

[0032] like Figure 3The accessories shown in the figure are assembled, including a fixed block 1 and a reed 7. The fixed block 1 is equipped with a needle holder 2, which is equipped with a weft needle 4, a hemming needle 5, and a knitting needle 6. The weft needle 4 is equipped with a belt pressure handle 3 to adjust the warp tension. Through careful assembly and adjustment, a smooth weaving process is ensured. The hemming needle 5 uses a double-hole hook as the hemming needle 5. The weft needle 4 is threaded with a double layer of weft thread 9, and the hemming needle 5's needle hole is threaded with a double layer of hemming thread 8. Bud threads 10 are provided on both sides of the reed 7, and the double weft needles 4 and knitting needles 6 are balanced up and down to achieve edge sealing and lace processing. This configuration allows for double hemming on both sides, improving hemming efficiency and quality. The fixed block 1 is fixed to the ribbon loom with screws and can be installed on velvet looms, shuttle looms, or other mechanical equipment according to process requirements. By improving the fixed block, a multi-functional machine can be realized.

[0033] 6. Edge locking optimization

[0034] Parameter adjustment:

[0035] Warp tension: 50-80 N / strand, adjusted according to the webbing material and thickness. Weft tension: Slightly less than warp tension, 10-20 N / strand, set using the weft pressure handle 3 to ensure fabric flatness. Loom speed: 800-900 rpm to improve production efficiency. Weft insertion speed: Keep consistent with the loom speed to ensure accurate weft insertion.

[0036] Pre-shrinkage treatment: Use steam or spray to lightly spray the yarn during the weaving process to make the fibers expand and relax, reducing the shrinkage of the ribbon.

[0037] Edge reinforcement: The lock edge line is used as a line to reinforce the edge and can also act as part of the weft line. Through two weft needles distributed on the left and right and two double-hole lock edge needles distributed in the same way, double-sided lock edge can be achieved on both sides.

[0038] Product Features: This webbing is woven on an improved shuttleless webbing machine and features a double-layer structure to enhance overall strength. The double-layer lock-edge structure with lace design is not only beautiful but also durable.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An improved high-efficiency overlocking process for double-layer overlock webbing on a shuttleless webbing machine, wherein the webbing is woven on a shuttleless webbing machine and has a double-layer overlock structure with a lace pattern, characterized by: The process improves the webbing process of velvet looms and applies it to shuttleless looms, including raw material preparation, yarn threading, pre-chain loop design, weft density control, and accessory assembly and edge optimization steps; The raw material preparation includes setting the number of warp threads, the number of covering threads, the number of weft threads and the number of overlock threads; the warp threads are interwoven with the weft threads, the overlock threads are located on the side of the ribbon, and a plurality of bud threads are provided on the side of the overlock threads; during the weaving process, the overlock threads are guided to the side of the ribbon and are beat-up and joined with the weft threads; The threading is carried out according to the preset threading diagram and the number of heald frames, and the number of warp threads required for each frame is accurately threaded into the heald frame; The first chain cycle design has a total of 48 links, which are distributed in the heald frame of the yarn threading step. The arrangement of high, medium and low links is set in the heald frame. One circle of the pattern chain drum is set with 8 links to control the rise and fall of the yarn to form the corresponding pattern and structure. The weft density control sets the weft density to 17.2 needles and the hoop grid specification to 10.5 PC; The described accessory assembly uses a velvet machine double-hole edge hook as a lock stitch, and cooperates with a double weft needle that is balanced up and down; the lock stitch and the weft needle are not on the same side; this structure performs double-sided lock stitching on both sides, and when the weft needle and the hook needle perform the lock stitching operation, they will pass through the bud thread, not only fixing the lock stitch to the edge of the ribbon, but also forming a lace effect through the interlacing of the bud thread; The edge locking optimization step includes adjusting relevant parameters of the shuttleless weaving machine, pre-shrinking the webbing and reinforcing the edge.

2. The high-efficiency overlocking process for an improved double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: There are 18 heald frames in the threading step, and the first 1-4 frames are double-hole healds, and a root thread is passed through the upper and lower parts of the double-hole healds.

3. The high-efficiency overlocking process for an improved double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: The accessory assembly includes a fixed block, a reed, a belt pressing handle and a needle seat. The belt pressing handle is designed on the weft needle to adjust the weft yarn tension. The needle seat and the reed are designed on the fixed block. The needle seat is provided with a lock stitch needle and a weft needle. The fixed block is assembled on a velvet machine and a shuttleless weaving machine.

4. The high-efficiency overlocking process for an improved double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: The hoop grid includes an arrangement of row reeds, the row reeds are arranged into multiple rows, and the bud lines are arranged on the outside of the first row and the last row.

5. The improved high-efficiency overlocking process for double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: The parameter adjustment of the edge locking optimization includes: Warp tension: Adjust the warp tension to an appropriate range, set between 50~80 Newtons / strand; Weft tension: The weft tension matches the warp tension and is set slightly lower than the warp tension by the belt pressing handle. Loom speed: The speed of shuttleless loom is set within the range of 800~900 rpm; Weft insertion speed: The weft insertion speed should be consistent with the loom speed.

6. The improved high-efficiency overlocking process for double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: The pre-shrinkage treatment is to lightly spray the yarn with steam or spray during the weaving process to expand and relax the fibers in the webbing, thereby achieving the purpose of pre-shrinkage.

7. The high-efficiency overlocking process for an improved double-layer overlocking webbing on a shuttleless webbing machine according to claim 1, characterized in that: The edge reinforcement is a lock edge line that can be used as a line to reinforce the edge, and can also serve as part of the weft line. The functions of the lock edge line and the weft line overlap. Through two weft needles distributed on the left and right and two lock edge needles distributed in the same way, double-sided lock edge can be achieved on both sides of the fabric.

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