A stretch fabric setting device and method

Abstract

The present application belongs to the technical field of fabric setting equipment, in particular to a stretch fabric setting device and method, comprising a setting frame, two groups of first connecting bearings are fixedly connected through the two side walls along the lateral width direction of the setting frame. The stretch fabric setting device has the functions of lateral width expansion and independent and accurate control of shrinkage in the warp direction, and can independently complete the setting processing of small-size stretch fabric hand weaving samples. It effectively solves the problems that the existing wide-width large cargo setting equipment cannot adapt to hand weaving sample processing, the inlaid type force deviation caused by line setting leads to distortion of hand weaving sample indicators, and the lack of two-way setting process size adjustment of small experimental equipment leads to poor consistency between hand weaving samples and large cargo properties. It can accurately reproduce the setting process parameters of large cargo, significantly improve the setting size precision and process reliability, ensure the guiding value of hand weaving samples for large cargo production, and effectively improve the efficiency of fabric new product sampling.

Description

Technical Field

[0001] This invention belongs to the technical field of fabric setting equipment, and in particular relates to a setting device and method for elastic fabrics. Background Technology

[0002] In the textile fabric development and production process, hand-woven samples are core verification samples used to confirm the fabric's structure, color, pattern, texture, and physical properties before mass production. Typical hand-woven samples are usually less than 30cm in size, directly showcasing the fabric's color, appearance (for yarn-dyed fabrics), texture, and feel. They are crucial for designers to verify design schemes, factories to confirm process parameters, and customers to confirm the final effect. With increasing consumer demand for fabric elasticity and wearing comfort, the proportion of weft-elastic and warp-weft dual-elastic fabrics containing spandex continues to rise. The finishing process, as the core of the dyeing and finishing of elastic fabrics, directly determines the finished fabric's width, warp and weft density, weight, dimensional stability, elasticity, and appearance (for yarn-dyed stripes and checks).

[0003] In current mass production, elastic fabrics are primarily set using wide-width stenter machines. For weft-stretch fabrics, lateral expansion is achieved using a needle plate chain; for warp-weft double-stretch fabrics, lateral expansion is achieved while warp shrinkage is controlled via an overfeed mechanism. Combined with precise temperature and speed control, this allows for stable management of various physical properties. However, such equipment is bulky and only suitable for large rolls of wide fabric, making it unsuitable for independent stenting of small-sized hand-knitted samples. The industry standard for stenting hand-knitted samples of elastic fabrics is to sew and embed them into the greige fabric, sending them to the stenter along with the mass production. This method has significant technical drawbacks: due to the small size of the hand-knitted sample and its embedding within the base fabric, the lateral expansion and warp shrinkage cannot be independently controlled. The stress state of the hand-knitted sample differs significantly from that of the mass production, ultimately resulting in large deviations in the width, warp and weft density, and weight of the finished hand-knitted sample from the design specifications. This also leads to deformation and distortion of the woven stripes and checks, rendering the sample completely ineffective in guiding mass production.

[0004] In addition, most existing small-scale experimental setting equipment is designed for non-elastic fabrics and only has simple clamping and heating functions. It lacks a two-way elasticity precision adjustment mechanism for elastic fabrics, and cannot simultaneously simulate the weft stretching and warp overfeeding process in mass production setting. It is difficult to accurately control the warp density, weft density and elasticity index of elastic fabrics. The hand-woven samples prepared have poor consistency in style and physical properties with the mass-produced finished products, which cannot meet the precision requirements of new product development.

[0005] To address these issues, we propose a setting device and method for elastic fabrics. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a setting device and method for elastic fabrics.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an elastic fabric shaping device, comprising a shaping frame, wherein two sets of first connecting bearings are fixedly connected through the two side walls of the shaping frame along the transverse width direction, and a transverse width screw is fixedly connected to the inner ring inner hole of each set of two first connecting bearings, and two symmetrically distributed first clamping mechanisms are threadedly sleeved on the rod walls of the two transverse width screws.

[0008] The shaping frame is fixedly connected to two sets of second connecting bearings along the two side walls located in the vertical width direction. The inner rings of the two second connecting bearings in each set are fixedly connected to a vertical width screw. The rod walls of the two vertical width screws are threaded together with two symmetrically distributed second clamping mechanisms.

[0009] One side of each of the two horizontal slat lead screws is fixedly connected to a first control mechanism;

[0010] One side of each of the two vertical spool screws is fixedly connected to a second control mechanism with the same structure as the first control mechanism.

[0011] In the above-mentioned elastic fabric shaping device, the side wall of the shaping frame is provided with a plurality of fixed through holes that cooperate with the outer wall of the outer ring of the first connecting bearing and the second connecting bearing, and the thread directions of the two ends of each of the transverse width screw and the vertical width screw are opposite.

[0012] In the aforementioned elastic fabric shaping device, the first clamping mechanism includes a first moving strip. The bottom end of the first moving strip has two threaded through holes matching the transverse width screw. The top end of the first moving strip has a first groove. The inner wall of the first groove is connected to a first rotating rod via a fixed bearing. Both ends of the first rotating rod are fixedly sleeved with first retaining rings. The outer wall of the first rotating rod between the two first retaining rings has an arc-shaped slot, and the slot wall is fixedly connected to a first positioning pin plate via screws. The two sets of positioning pins on the first positioning pin plate are staggered. Both ends of the first rotating rod are sleeved with first torsion springs. The two ends of the first torsion springs are fixedly connected to the outer wall of the first retaining ring and the slot wall of the first groove, respectively. The outer wall of the first moving strip has a through hole, and the hole wall of the through hole is movably connected to a first pin. The rod wall of the first pin is sleeved with a first return spring, and both ends of the first return spring are fixedly connected to the first pin and the outer wall of the first moving strip, respectively. The outer wall of the first retaining ring has a first insertion hole that mates with the first pin.

[0013] In the aforementioned elastic fabric shaping device, the second clamping mechanism includes two threaded cylinders threadedly connected to a vertical width screw. A second moving strip is fixedly connected to the outer walls of the two threaded cylinders. A second groove is formed at the top of the second moving strip. A second rotating rod is connected to the inner wall of the second groove via a fixed bearing. A second retaining ring is fixedly fitted to both ends of the second rotating rod. An arc-shaped slot is formed on the outer wall of the second rotating rod between the two second retaining rings. A second positioning pin plate is fixedly connected to the slot wall of the arc-shaped slot via screws. Two sets of positioning pins on the second positioning pin plate are staggered. A second torsion spring is fitted to both ends of the second rotating rod. The two ends of the second torsion spring are fixedly connected to the outer wall of the second retaining ring and the slot wall of the second groove, respectively. A through hole is formed on the outer wall of the second moving strip. A second pin is movably connected to the wall of the through hole. A second return spring is fitted to the rod wall of the second pin. The two ends of the second return spring are fixedly connected to the outer walls of the second pin and the second moving strip, respectively. A second insertion hole is formed on the outer wall of the second retaining ring to cooperate with the second pin.

[0014] In the above-mentioned elastic fabric shaping device, the upper surfaces of the two first moving strips and the two second moving strips are on the same horizontal plane, and the outer walls of the first and second retaining rings are fixedly connected with deflection handles.

[0015] In the above-mentioned elastic fabric shaping device, the first control mechanism includes two transmission sprockets, which are respectively fixedly sleeved to the side ends of two transverse width screws. A transmission chain is sleeved on the outer wall of the two transmission sprockets. An L-shaped handle is fixedly connected to the end face of one of the transverse width screws. Multiple L-shaped high-temperature resistant rubber blocks are fixedly connected to the outer wall of the shaping frame. The outer wall of the L-shaped high-temperature resistant rubber blocks is in contact with the outer wall of the end face of the transmission sprocket.

[0016] In the above-mentioned elastic fabric shaping device, two mutually perpendicular scales are fixedly embedded at the corner of the upper surface of the shaping frame, two symmetrically distributed U-shaped handles are fixedly connected to the upper surface of the shaping frame, and multiple ventilation slots are opened on the lower surface of the shaping frame.

[0017] A method for setting elastic fabrics, which incorporates the aforementioned elastic fabric setting device, is characterized by comprising the following steps:

[0018] S1: Clamping preparation: Move the deflection handles of the first clamping mechanism and the second clamping mechanism respectively to drive the first rotating rod and the second rotating rod to rotate to the set angle, so that the positioning pins of the first positioning pin plate and the second positioning pin plate are in a vertical state. The first pin and the second pin are respectively inserted into the corresponding holes to complete the circumferential locking and maintain the vertical clamping posture of the positioning pin.

[0019] S2: Fabric warp clamping and warp shrinkage adjustment;

[0020] Fabric warp clamping: Lay the hand-knitted elastic fabric sample to be shaped flat above the shaping frame. Turn the handle of the second linkage mechanism to drive the two vertical width screws to rotate synchronously, at the same speed, and in the same direction. Drive the two second clamping mechanisms to move in opposite directions along the vertical direction. Adjust the clamping distance of the second clamping mechanisms to a length that is slightly narrower than the warp length of the hand-knitted sample in its natural state. Insert the upper and lower warp edges of the hand-knitted sample flat onto the misaligned positioning pins of the two second positioning pin plates to complete the initial warp positioning of the hand-knitted sample. Then pull out the second pin to release the circumferential lock of the second rotating rod, so that the second positioning pin plate deflects outward under the elastic force of the corresponding second torsion spring, forming an anti-disengagement hook limit on the upper and lower edges of the hand-knitted sample. Read and record the warp clamping length scale reading.

[0021] Warp shrinkage adjustment: For warp elastic fabrics or warp-weft double elastic fabrics that require warp shrinkage, the warp length process setting value is calculated based on the initial warp clamping length, weft density, and warp elasticity index of the hand-woven sample under natural conditions, as well as the requirements of the weft density and weft elasticity index of the final product. The second control mechanism drives the two vertical width screws to rotate synchronously, at the same speed, and in the same direction according to the fabric warp clamping steps in S2 above, driving the two second clamping mechanisms to move in opposite directions along the vertical direction to control the warp shrinkage of the hand-woven sample. After adjusting the warp length to the process setting value with the warp clamping length scale, the rotation stops, and the position is locked by friction damping.

[0022] S3: Fabric weft clamping and lateral width adjustment;

[0023] Fabric weft clamping: The first control mechanism drives the transverse width screw to rotate synchronously, at the same speed, and in the same direction according to the fabric warp clamping steps in S2 above. With the help of reverse thread transmission, the two first clamping mechanisms move in opposite directions in the transverse direction to adjust the clamping distance of the first clamping mechanisms to a width that is slightly narrower in the weft direction of the hand-knitted sample in its natural state. The left and right edges of the weft direction of the hand-knitted sample are evenly inserted into the misaligned positioning needles of the first positioning needle plate to complete the initial positioning of the hand-knitted sample. Then, the first pin is pulled out to release the circumferential lock of the first rotating rod, so that the first positioning needle plate deflects outward under the elastic force of the corresponding first torsion spring, forming an anti-disengagement hook limit for the left and right edges of the weft direction of the hand-knitted sample. The reading of the weft clamping width scale is read and recorded.

[0024] Lateral Width Adjustment: For weft elastic or warp-weft double elastic fabrics that require lateral width adjustment, the weft width process setting value is calculated based on the initial weft clamping width, warp density, and weft elasticity index of the hand-woven sample under natural conditions, as well as the requirements of the warp density and weft elasticity index of the final finished product. The first control mechanism rotates the two lateral width screws synchronously, at the same speed, and in the same direction according to the fabric warp clamping steps in S2 above. The two first clamping mechanisms are driven to move in opposite directions laterally by reverse thread transmission, so as to uniformly expand and stretch the lateral width of the hand-woven sample. After adjusting the weft width to the process setting value with the weft clamping width scale, the rotation stops, and the position is locked by friction damping.

[0025] S5: High-temperature setting. The entire setting device, along with the clamped hand-knitted sample, is fed into the high-temperature setting equipment through the U-shaped handle. It is heated and set under the preset temperature and duration conditions. During the setting process, the hot airflow circulates fully through the ventilation slots at the bottom of the setting frame to ensure that the front and back of the hand-knitted sample are heated evenly.

[0026] S6: Unloading and removing parts. After the shaping is completed, remove the shaping device from the high-temperature shaping equipment. After cooling to room temperature, turn the deflection handle again to make the positioning pin rotate and lock it in a vertical position. Smoothly remove the shaped hand-knitted sample from the positioning pin to obtain the shaped hand-knitted sample that meets the design specifications.

[0027] Compared with existing technologies, the advantages of this invention are:

[0028] 1. Through the first and second clamping mechanisms, when the elastic fabric hand-knitted sample is clamped and shaped, the operator can rotate the first and second rotating rods to a set angle by turning the handle, so that the positioning pins are in a vertical state and complete circumferential locking, making it easy to quickly and evenly insert the four edges of the hand-knitted sample onto the staggered positioning pins; after unlocking, the first and second torsion springs release their elasticity, causing the first and second rotating rods to deflect outward, so that the first and second positioning pin plates tilt outward synchronously, forming a hook limit on the edge of the hand-knitted sample. This solves the problems of insufficient gripping force on the fabric edge during the shaping of existing hand-knitted samples, easy displacement and detachment due to the impact of circulating hot air during high-temperature shaping, and edge slippage and deformation. At the same time, it replaces the traditional processing method of sewing and inlaying hand-knitted samples, eliminating the need for additional base fabric and sewing process, achieving convenient and efficient clamping operation, reliable and stable gripping and fixing, effectively ensuring the dimensional accuracy of shaping, and improving the reliability and operational efficiency of the hand-knitted sample shaping process.

[0029] 2. Through the configured horizontal and vertical width screws and corresponding first and second control mechanisms, when it is necessary to adjust the warp shrinkage and width of the handwoven pattern, the first and second control mechanisms drive the horizontal and vertical width screws to rotate. Utilizing the transmission characteristics of the reverse threads on both sides of the horizontal and vertical width screws, the two first clamping mechanisms are driven to move in opposite directions at a uniform speed, and the two second clamping mechanisms also move in opposite directions at a uniform speed, thereby achieving the horizontal width expansion and warp shrinkage respectively. The volume control, combined with a scale, allows for precise reading of adjustment dimensions. This solves the problems of existing small-scale experimental shaping equipment lacking precise bidirectional stretching or shrinkage adjustment mechanisms, being unable to simultaneously simulate the lateral width stretching and warp overfeeding processes of mass production shaping, and having significant deviations between hand-woven sample width, warp and weft density, and weight indicators and the mass production. It achieves bidirectional independent controllability, high adjustment precision, and high reproducibility of mass production shaping process parameters, fully ensuring the consistency of physical properties and style between the hand-woven sample and the finished mass production, and guaranteeing the guiding value of the hand-woven sample for mass production.

[0030] 3. With its set-up frame, ventilation slots, and U-shaped handles, after the hand-woven sample is clamped and its size adjusted, the entire setting device is directly fed into a small high-temperature setting equipment for heating and setting via the U-shaped handles. The bottom ventilation slots guide the hot airflow to penetrate evenly under the fabric, ensuring consistent heating on both sides of the hand-woven sample. The friction damping between the L-shaped high-temperature resistant rubber block and the transmission sprocket maintains stable dimensional stability throughout the setting process. The U-shaped handle facilitates the overall transport and handling of the setting device. This solves the problems of existing wide-width tenter frame machines being unable to independently process small-sized hand-woven samples, uneven heating of the fabric during setting leading to differences in color and elasticity, and dimensional shifts due to fabric rebound. The device achieves a compact and small structure, compatibility with conventional experimental ovens, uniform heating during setting, and stable dimensional stability throughout the process. It can independently complete hand-woven sample setting without relying on a mass production line, effectively reducing new product sampling costs and improving the efficiency of new fabric development. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an elastic fabric shaping device and shaping method provided by the present invention;

[0032] Figure 2 yes Figure 1 A schematic diagram of the partial three-dimensional structure;

[0033] Figure 3 yes Figure 1 Enlarged structural diagram of part A in the middle;

[0034] Figure 4 yes Figure 1 A schematic diagram of the lateral cross-section of the first clamping mechanism;

[0035] Figure 5 yes Figure 1 A schematic diagram of the lateral cross-section of the second clamping mechanism;

[0036] Figure 6 yes Figure 1 A schematic diagram of the structure of the first joint control mechanism.

[0037] In the diagram: 1. Shaping frame; 2. First connecting bearing; 3. Transverse width lead screw; 4. First clamping mechanism; 41. First moving bar; 42. Threaded through hole; 43. First groove; 44. First rotating rod; 45. First retaining ring; 46. First positioning pin plate; 47. First torsion spring; 48. First pin; 49. First return spring; 410. First insertion hole; 5. Second connecting bearing; 6. Vertical width lead screw; 7. Second clamping mechanism; 71. Threaded cylinder; 72. 73. Second moving bar; 74. Second groove; 75. Second rotating rod; 76. Second retaining ring; 77. Second positioning pin plate; 78. Second torsion spring; 79. Second pin; 70. Second return spring; 710. Second insertion hole; 81. First linkage mechanism; 82. Transmission sprocket; 83. Transmission chain; 84. L-shaped handle; 9. L-shaped high-temperature resistant rubber block; 10. Second linkage mechanism; 11. Deflection handle; 12. Scale; 13. U-shaped handle; 14. Ventilation slot. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1-6As shown, a shaping device for elastic fabric includes a shaping frame 1. Two sets of first connecting bearings 2 are fixedly connected through both sides of the shaping frame 1 along the transverse width direction. A transverse width lead screw 3 is fixedly connected to the inner ring of each set of two first connecting bearings 2. Two symmetrically distributed first clamping mechanisms 4 are threadedly sleeved on the walls of the two transverse width lead screws 3. Each first clamping mechanism 4 includes a first moving bar 41. Two threaded through holes 42 matching the transverse width lead screws 3 are opened at the bottom end of the first moving bar 41. A first groove 43 is opened at the top end of the first moving bar 41. A first rotating rod 44 is connected to the inner wall of the first groove 43 via a fixed bearing. First retaining rings 45 are fixedly sleeved at both ends of the first rotating rod 44. An arc-shaped groove is formed on the outer wall between the two first retaining rings 45, and a first positioning pin plate 46 is fixedly connected to the groove wall by screws. The two sets of positioning pins of the first positioning pin plate 46 are staggered. A first torsion spring 47 is sleeved on both ends of the first rotating rod 44. The two ends of the first torsion spring 47 are fixedly connected to the outer wall of the first retaining ring 45 and the groove wall of the first groove 43, respectively. A through hole is formed on the outer wall of the first moving bar 41, and a first pin 48 is movably connected to the hole wall. A first return spring 49 is sleeved on the rod wall of the first pin 48. The two ends of the first return spring 49 are fixedly connected to the outer wall of the first pin 48 and the first moving bar 41, respectively. A first insertion hole 410 is formed on the outer wall of the first retaining ring 45 to cooperate with the first pin 48.

[0040] Along the two side walls of the shaping frame 1 located in the direction perpendicular to the width, two sets of second connecting bearings 5 ​​are fixedly connected. The inner rings of the two second connecting bearings 5 ​​in each set are fixedly connected to a vertical width lead screw 6. The walls of the two vertical width lead screws 6 are threaded together with two symmetrically distributed second clamping mechanisms 7. The second clamping mechanism 7 includes two threaded cylinders 71 that are threaded together with the vertical width lead screws 6. The outer walls of the two threaded cylinders 71 are fixedly connected to a second moving bar 72. The top end of the second moving bar 72 is provided with a second groove 73. The inner wall of the second groove 73 is connected to a second rotating rod 74 through a fixed bearing. Both ends of the second rotating rod 74 are fixedly sleeved with second retaining rings 75. The outer wall of the second rotating rod 74 located between the two second retaining rings 75 has an arc-shaped opening. The groove is slotted, and the groove wall of the arc-shaped groove is fixedly connected to the second positioning pin plate 76 by screws. The two sets of positioning pins of the second positioning pin plate 76 are staggered. The two ends of the second rotating rod 74 are each sleeved with a second torsion spring 77. The two ends of the second torsion spring 77 are respectively fixedly connected to the outer wall of the second retaining ring 75 and the groove wall of the second groove 73. The outer wall of the second moving bar 72 has a through hole, and the hole wall of the through hole is movably connected to a second pin 78. The rod wall of the second pin 78 is sleeved with a second return spring 79. The two ends of the second return spring 79 are respectively fixedly connected to the outer wall of the second pin 78 and the second moving bar 72. The outer wall of the second retaining ring 75 has a second insertion hole 710 that cooperates with the second pin 78, wherein the horizontal width direction is the weft direction and the vertical width direction is the warp direction.

[0041] The upper surfaces of the two first moving bars 41 and the two second moving bars 72 are on the same horizontal plane. The transverse width screw 3 is located above the vertical width screw 6, and there is a certain height difference between them. The vertical width screw 6 will not block the first moving bar 41 from moving on the transverse width screw 3. The outer walls of the first retaining ring 45 and the second retaining ring 75 are fixedly connected with deflection handles 10. The deflection handles 10 can easily drive the first rotating rod 44 and the second rotating rod 74 to deflect.

[0042] One side of each of the two transverse width lead screws 3 is fixedly connected to a first control mechanism 8. The first control mechanism 8 includes two transmission sprockets 81, which are respectively fixedly sleeved to the side ends of the two transverse width lead screws 3. A transmission chain 82 is sleeved on the outer wall of the two transmission sprockets 81. An L-shaped handle 83 is fixedly connected to the end face of one of the transverse width lead screws 3. Multiple L-shaped high-temperature resistant rubber blocks 84 are fixedly connected to the outer wall of the shaping frame 1. The outer wall of the L-shaped high-temperature resistant rubber blocks 84 contacts the outer wall of the end face of the transmission sprocket 81, i.e., one transmission chain. Wheel 81 contacts multiple L-shaped high-temperature resistant rubber blocks 84, which have a large frictional resistance and ensure self-locking capability. The L-shaped high-temperature resistant rubber blocks 84 are made of fluororubber material and are integrally molded and vulcanized. They have high temperature resistance and can maintain a stable working temperature of up to 220℃ for a long time. They are fully compatible with the conventional shaping conditions of elastic fabrics from 150℃ to 200℃. The friction coefficient fluctuates little at high temperatures and the damping performance is stable. They are not prone to aging, hardening and performance degradation, thus ensuring that the L-shaped high-temperature resistant rubber blocks 84 can maintain stable frictional damping performance under long-term high-temperature cyclic conditions.

[0043] One side of each of the two vertical spool screws 6 is fixedly connected to a second control mechanism 9, which has the same structure as the first control mechanism 8.

[0044] The side wall of the shaping frame 1 has multiple fixed through holes that mate with the outer wall of the outer ring of the first connecting bearing 2 and the second connecting bearing 5. The thread directions of the two ends of each horizontal width screw 3 and vertical width screw 6 are opposite. Two mutually perpendicular scales 11 are fixedly embedded at the corner of the upper surface of the shaping frame 1. Two symmetrically distributed U-shaped handles 12 are fixedly connected to the upper surface of the shaping frame 1. Multiple ventilation slots 13 are opened on the lower surface of the shaping frame 1.

[0045] The operating principle of the present invention is described as follows: When the hand-knitted sample of elastic fabric needs to be shaped, the operator first turns the deflection handle 10 on the first clamping mechanism 4 and the second clamping mechanism 7 respectively, which drives the first retaining ring 45 and the second retaining ring 75 to deflect, thereby driving the first rotating rod 44 and the second rotating rod 74 to rotate synchronously around the fixed bearing by about 60°, so that the positioning needles of the first positioning needle plate 46 and the second positioning needle plate 76 are in a vertically upward state.

[0046] At this time, the first torsion spring 47 and the second torsion spring 77 twist with the first rotating rod 44 and the second rotating rod 74 and accumulate elastic restoring force. At the same time, the first pin 48 is inserted into the first insertion hole 410, and the insertion structure is reliable under the elastic force of the first return spring 49. The second pin 78 is inserted into the second insertion hole 710, and the insertion structure is reliable under the elastic force of the second return spring 79. The first rotating rod 44 and the second rotating rod 74 are circumferentially locked, and the vertical state of the positioning needle is continuously maintained. This makes it easy for the operator to smoothly insert the four edges of the hand-knitted pattern onto the misaligned positioning needles of the first positioning needle plate 46 and the second positioning needle plate 76, thus completing the initial positioning of the hand-knitted pattern.

[0047] After the hand-knitted pattern is placed in place, pull out the first pin 48 and the second pin 78 to release the circumferential locking of the first rotating rod 44 and the second rotating rod 74. At this time, the first torsion spring 47 and the second torsion spring 77 release their elastic restoring force, respectively driving the first rotating rod 44 and the second rotating rod 74 to deflect and reset to the outside of the shaping frame 1, so that the first positioning needle plate 46 and the second positioning needle plate 76 tilt outward synchronously with the first rotating rod 44 and the second rotating rod 74, and the positioning needle changes from a vertical state to an outward tilting state, forming a hook limit on the edge of the hand-knitted pattern.

[0048] The first clamping mechanism 4 and the second clamping mechanism 7 enable convenient operation when clamping hand-knitted samples. The outward tilting structure of the positioning pins after clamping forms a reliable anti-detachment limit, which solves the problem that the fabric is easily displaced and falls off due to the impact of circulating hot airflow during the shaping process of hand-knitted samples. At the same time, the staggered positioning pins can further enhance the edge gripping force, avoid the fabric edge from slipping and deforming, ensure the shaping size accuracy, and improve the reliability of the shaping process.

[0049] After the warp of the hand-knitted sample is clamped, the warp shrinkage is independently adjusted via the second control mechanism 9; after the weft of the hand-knitted sample is clamped, the weft width is independently adjusted via the first control mechanism 8.

[0050] To control the warp shrinkage (vertical width direction), the handle of the second control mechanism 9 is rotated, causing one of the vertical width lead screws 6 to rotate around the second connecting bearing 5. The sprocket and chain drive assembly at the end of the vertical width lead screw 6 drive the other vertical width lead screw 6 to rotate synchronously, at the same speed, and in the same direction. Since the thread directions of the two sides of the rod wall of each vertical width lead screw 6 are opposite, the second moving bar 72 of the two second clamping mechanisms 7 forms a threaded transmission engagement with the vertical width lead screw 6 through the threaded cylinder 71 at the bottom end. When the vertical width lead screw 6 rotates, it moves in opposite directions along the rod wall direction to control the warp shrinkage of the hand-woven sample, completely simulating the warp overfeed process in the mass production finalization.

[0051] For weft width control, the transmission principle is completely consistent with the warp (perpendicular width direction) adjustment. The L-shaped handle 83 of the second control mechanism 8 drives the transverse width screw 3 to rotate synchronously, at the same speed and in the same direction around the first clamping mechanism 4. The reverse thread structure drives the first moving strips 41 of the two first clamping mechanisms 4 to move away from each other at a uniform speed, so as to uniformly expand and stretch the transverse width of the hand-knitted sample, completely simulating the weft stretching process in the mass production finalization.

[0052] During the adjustment process, the operator can read the horizontal width and warp length values ​​in real time through the scale 11 embedded at the corner of the upper surface of the shaping frame 1, and accurately control the expansion and shrinkage of the warp, so that the width, warp and weft density, weight and other indicators of the handwoven sample accurately match the design requirements. After the adjustment is completed, the L-shaped high-temperature resistant rubber block 84 fixed on the side wall of the shaping frame 1 is in close contact with the outer wall of the transmission sprocket 81. The static friction force forms a damping self-locking on the transmission sprocket 81, preventing the horizontal width lead screw 3 and the vertical width lead screw 6 from reversing due to the rebound tension of the elastic fabric, and ensuring that the dimensions of the handwoven sample are stable and without deviation throughout the shaping process.

[0053] This structure, through a dual-screw synchronous control structure and reverse thread transmission, achieves independent and precise adjustment of the weft and warp bidirectional shaping dimensions. It can effectively simulate the weft expansion and warp overfeed control process of large-scale stenter machines, solving the core problems of existing small stenter equipment being unable to control the bidirectional shaping dimensions and the poor consistency between hand-woven samples and large-scale products. Combined with the visual reading of the scale 11 and the friction self-locking structure of the L-shaped high-temperature resistant rubber block 84, it not only improves the accuracy of dimension adjustment but also ensures the long-term stability of the adjustment state, effectively improving the pass rate of hand-woven sample shaping indicators.

[0054] After the size adjustment is completed, the operator uses the symmetrically distributed U-shaped handles 12 on the shaping frame 1 to send the entire shaping device, along with the clamped hand-knitted sample, into a small high-temperature shaping device or oven for heating and shaping. Multiple ventilation slots 13 on the lower surface of the shaping frame 1 allow hot air to fully penetrate the bottom of the device, forming a uniform airflow circulation below the hand-knitted sample. This ensures uniform heating on both sides of the hand-knitted sample and avoids problems such as uneven shaping, color deviation, and inconsistent elastic recovery caused by localized temperature differences.

[0055] After the shaping is completed and cooled to room temperature, remove the shaping device from the high-temperature shaping equipment, and turn the deflection handles 10 on both sides again to make the positioning needles return to the vertical position and lock them. Then the shaped hand-knitted sample can be smoothly removed from the positioning needles, completing the entire shaping operation.

[0056] 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 within the protection scope of the present invention.

Claims

1. A shaping device for elastic fabrics, comprising a shaping frame (1), characterized in that, The shaping frame (1) has two sets of first connecting bearings (2) fixedly connected through the two side walls along the transverse width direction. The inner rings of the two first connecting bearings (2) in each set are fixedly connected to the transverse width screw (3). The rod walls of the two transverse width screws (3) are threaded together with two symmetrically distributed first clamping mechanisms (4). The shaping frame (1) has two sets of second connecting bearings (5) fixedly connected through the two side walls located in the vertical width direction. The inner ring of each set of two second connecting bearings (5) is fixedly connected to a vertical width screw (6). The rod walls of the two vertical width screws (6) are threaded together with two symmetrically distributed second clamping mechanisms (7). One side of each of the two transverse spools (3) is fixedly connected to a first control mechanism (8). One side of each of the two vertical screws (6) is fixedly connected to a second control mechanism (9) with the same structure as the first control mechanism (8).

2. The elastic fabric shaping device according to claim 1, characterized in that, The side wall of the fixed frame (1) is provided with a plurality of fixed through holes that cooperate with the outer wall of the outer ring of the first connecting bearing (2) and the second connecting bearing (5). The thread directions of the two ends of each of the transverse span screw (3) and the vertical span screw (6) are opposite.

3. The elastic fabric shaping device according to claim 2, characterized in that, The first clamping mechanism (4) includes a first moving bar (41). The bottom end of the first moving bar (41) has two threaded through holes (42) that match the transverse span screw (3). The top end of the first moving bar (41) has a first groove (43). The inner wall of the first groove (43) is connected to a first rotating rod (44) through a fixed bearing. Both ends of the first rotating rod (44) are fixedly sleeved with first retaining rings (45). The outer wall of the first rotating rod (44) between the two first retaining rings (45) has an arc-shaped slot. The groove wall of the arc-shaped slot is fixedly connected to a first positioning pin plate (46) by screws. The first positioning pin plate (46) has two sets of fixed... The position pins are arranged in a staggered manner. Both ends of the first rotating rod (44) are fitted with a first torsion spring (47). The two ends of the first torsion spring (47) are fixedly connected to the outer wall of the first retaining ring (45) and the groove wall of the first groove (43), respectively. The outer wall of the first moving bar (41) is provided with a through hole, and the hole wall of the through hole is movably connected with a first pin (48). The rod wall of the first pin (48) is fitted with a first return spring (49). The two ends of the first return spring (49) are fixedly connected to the outer wall of the first pin (48) and the first moving bar (41), respectively. The outer wall of the first retaining ring (45) is provided with a first insertion hole (410) that cooperates with the first pin (48).

4. The elastic fabric shaping device according to claim 3, characterized in that, The second clamping mechanism (7) includes two threaded cylinders (71) threadedly connected to the vertical flange screw (6). The outer walls of the two threaded cylinders (71) are fixedly connected to a second moving bar (72). The top end of the second moving bar (72) is provided with a second groove (73). The inner wall of the second groove (73) is connected to a second rotating rod (74) through a fixed bearing. Both ends of the second rotating rod (74) are fixedly sleeved with second retaining rings (75). The outer wall of the second rotating rod (74) between the two second retaining rings (75) is provided with an arc-shaped slot. The groove wall of the arc-shaped slot is fixedly connected to a second positioning pin plate (76) by screws. The two ends of the second positioning pin plate (76) are fixedly sleeved with a second positioning pin plate (76). The positioning pins are staggered. Both ends of the second rotating rod (74) are fitted with second torsion springs (77). The two ends of the second torsion springs (77) are fixedly connected to the outer wall of the second retaining ring (75) and the groove wall of the second groove (73), respectively. The outer wall of the second moving bar (72) is provided with a through hole, and the hole wall of the through hole is movably connected with a second pin (78). The rod wall of the second pin (78) is fitted with a second return spring (79). The two ends of the second return spring (79) are fixedly connected to the outer wall of the second pin (78) and the second moving bar (72), respectively. The outer wall of the second retaining ring (75) is provided with a second insertion hole (710) that cooperates with the second pin (78).

5. The elastic fabric shaping device according to claim 4, characterized in that, The upper surfaces of the two first moving bars (41) and the two second moving bars (72) are on the same horizontal plane, and the outer walls of the first retaining ring (45) and the second retaining ring (75) are fixedly connected with deflection handles (10).

6. The elastic fabric shaping device according to claim 5, characterized in that, The first control mechanism (8) includes two transmission sprockets (81), which are fixedly sleeved to the side ends of two transverse sprockets (3), and a transmission chain (82) is sleeved on the outer wall of the two transmission sprockets (81). An L-shaped handle (83) is fixedly connected to the end face of one of the transverse sprockets (3). Multiple L-shaped high-temperature resistant rubber blocks (84) are fixedly connected to the outer wall of the shaping frame (1), and the outer wall of the L-shaped high-temperature resistant rubber blocks (84) is in contact with the outer wall of the end face of the transmission sprocket (81).

7. The elastic fabric shaping device according to claim 6, characterized in that, Two scales (11) are fixedly embedded at the corner of the upper surface of the shaping frame (1), and two symmetrically distributed U-shaped handles (12) are fixedly connected to the upper surface of the shaping frame (1). Multiple ventilation slots (13) are opened on the lower surface of the shaping frame (1).

8. A method for setting elastic fabrics, which incorporates the setting device for elastic fabrics according to claim 7, characterized in that, The method includes the following steps: S1: Clamping preparation, respectively move the deflection handle (10) of the first clamping mechanism (4) and the second clamping mechanism (7) to drive the first rotating rod (44) and the second rotating rod (74) to rotate to the set angle, so that the positioning pins of the first positioning pin plate (46) and the second positioning pin plate (76) are in a vertical state, and the first pin (48) and the second pin (78) are respectively inserted into the corresponding insertion hole to complete the circumferential locking and maintain the vertical clamping posture of the positioning pin; S2: Fabric warp clamping and warp shrinkage adjustment; Fabric warp clamping: Lay the elastic fabric hand-knitted sample to be shaped flat on the shaping frame (1), rotate the handle of the second linkage mechanism (9) to drive the two vertical width screws (6) to rotate synchronously, at the same speed and in the same direction, drive the two second clamping mechanisms (7) to move in opposite directions in the vertical direction, adjust the clamping distance of the second clamping mechanism (7) to the length of the warp length of the hand-knitted sample in the natural state, and insert the upper and lower edges of the warp of the hand-knitted sample flat onto the misaligned positioning needles of the two second positioning needle plates (76) to complete the initial warp positioning of the hand-knitted sample; then pull out the second pin (78) to release the circumferential lock of the second rotating rod (74), so that the second positioning needle plate (76) deflects outward under the elastic force of the corresponding second torsion spring (77) to form an anti-detachment hook limit on the upper and lower edges of the hand-knitted sample, and read and record the reading of the warp clamping length scale (11); Warp shrinkage adjustment: For warp elastic fabrics or warp and weft double elastic fabrics that require warp shrinkage, calculate the warp length process setting value according to the initial warp clamping length, weft density, and warp elasticity index of the hand-woven sample under the above natural state, and the requirements of the weft density and weft elasticity index of the final product; drive the two vertical width screws (6) to rotate synchronously, at the same speed, and in the same direction according to the fabric warp clamping steps of S2 above, and drive the two second clamping mechanisms (7) to move in opposite directions along the vertical direction to control the warp shrinkage of the hand-woven sample; after adjusting the warp length to the process setting value with the warp clamping length scale (11), stop rotating and lock the position through friction damping; S3: Fabric weft clamping and lateral width adjustment; Fabric weft clamping: The first control mechanism (8) drives the transverse width screw (3) to rotate synchronously, at the same speed and in the same direction according to the fabric warp clamping steps of S2 above. By means of reverse thread transmission, the two first clamping mechanisms (4) are driven to move in opposite directions in the transverse direction to adjust the clamping distance of the first clamping mechanism (4) to a width that is slightly narrower in the weft width of the hand-knitted sample in its natural state. The left and right edges of the weft of the hand-knitted sample are evenly inserted into the misaligned positioning needles of the first positioning needle plate (46) to complete the initial positioning of the hand-knitted sample. Then, the first pin (48) is pulled out to release the circumferential lock of the first rotating rod (44), so that the first positioning needle plate (46) is deflected outward under the elastic force of the corresponding first torsion spring (47) to form an anti-disengagement hook limit on the left and right edges of the weft of the hand-knitted sample. The reading of the weft clamping width scale (11) is read and recorded. Lateral width adjustment: For weft elastic fabrics or warp and weft double elastic fabrics that require lateral width adjustment, calculate the weft width process setting value according to the initial weft clamping width, warp density, and weft elasticity index of the hand-woven sample under the above natural state, and the requirements of the warp density and weft elasticity index of the final product; through the first control mechanism (8), make the two lateral width screws (3) rotate synchronously, at the same speed, and in the same direction according to the fabric warp clamping steps of S2 above, and drive the two first clamping mechanisms (4) to move in opposite directions in the lateral direction by means of reverse screw transmission, so as to uniformly expand and stretch the lateral width of the hand-woven sample; after adjusting the weft width to the process setting value with the weft clamping width scale (11), stop rotating and lock the position by friction damping; S4: High temperature setting. The entire setting device, along with the clamped hand-woven sample, is sent into the high temperature setting equipment through the U-shaped handle (12). The sample is heated and set under the preset temperature and duration conditions. During the setting process, the hot airflow circulates fully through the ventilation slot (13) at the bottom of the setting frame (1) to ensure that the front and back of the hand-woven sample are heated evenly. S5: Unload and remove parts. After the shaping is completed, remove the shaping device from the high-temperature shaping equipment. After cooling to room temperature, turn the deflection handle (10) again to make the positioning needle rotate and lock it in a vertical state. Smoothly remove the shaped hand-knitted sample from the positioning needle to obtain the shaped hand-knitted sample that meets the design specifications.

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