Silk thread gum dipping device and using method thereof

Abstract

The invention discloses a silk yarn impregnation device and a using method thereof, and belongs to the technical field of fiber yarn impregnation. The silk yarn impregnation device is characterized in that a heater is arranged at the bottom of an impregnation box, a yarn pressing platform is further arranged at the bottom of the impregnation box, a glue scraping female base is arranged on one side of the yarn pressing platform, and a flexible glue scraping assembly is embedded in the glue scraping female base; a roller line pressing device is installed on the flexible glue scraping assembly and connected with the flexible glue scraping assembly through a first bolt, the roller line pressing device makes contact with a line pressing platform, a line passing device is distributed on the feeding side of the glue dipping box, supporting legs are arranged at the bottom of the glue scraping female base to form a door opening, glue can flow conveniently, and a set of vertical line grooves are formed in the glue scraping female base. The problems that traditional soaking type impregnation is long in consumed time and poor in permeability, the fluidity of glue cannot be guaranteed, and silk threads are prone to being cut off due to hard contact of scraped glue at the glue scraping position are solved, and the device is mainly applied to fiber yarn impregnation.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber filament dipping, and specifically to a silk thread dipping device and its usage method. Background Art

[0002] In today's silk thread processing industry, silk thread dipping, as a core process, its quality directly affects the performance of subsequent products and market competitiveness. Industry research and enterprise production data feedback show that due to defects in dipping quality, the defective rate of many enterprises' products remains high, which not only greatly increases production costs but also causes serious waste of resources.

[0003] In the field of precision silk thread processing, the traditional immersion dipping process has long relied on the natural penetration mechanism, exposing multi-dimensional technical shortcomings. Analyzed from the kinetic principle, this process relies on the concentration difference between the glue and the silk fiber to drive molecular diffusion. Under normal temperature and pressure conditions, deep penetration takes 4 - 8 hours, and there is a large performance gap.

[0004] This inefficient penetration directly leads to insufficient strengthening of the silk thread structure. Through electron microscope observation, the cross-section of the incompletely penetrated silk thread shows a "sandwich layer" structure: the outer glue layer thickness is only 5 - 10μm, and the glue filling rate between internal fiber bundles is less than 60%, forming a large number of pore defects with a diameter of 5 - 20μm. Mechanical tests show that the tensile strength of such silk threads decreases by 25% - 30% compared to the completely penetrated state, and the number of abrasion-resistant times is reduced by more than 40%.

[0005] In the subsequent glue amount control link, the mainstream roller and knife scraping devices generally adopt a rigid contact design, which is essentially contradictory to the physical properties of the silk thread. When dealing with the sudden change in diameter at the joint under the contact pressure, the stress concentration coefficient at the joint will exceed 3.0, far exceeding the tolerance threshold of the silk thread substrate (the tensile strength of nylon 66 silk thread is 150 - 200MPa), resulting in the joint fracture probability increasing to 12% - 15%.

[0006] Production site data shows that in every ten thousand times of scraping treatment, the wire breakage accidents caused by hard contact reach 80 - 120 times. Each interruption requires 3 - 5 minutes for manual wire threading and equipment restart, resulting in a daily production capacity loss of 5% - 8% for a single production line. During the manual intervention process, pollutants such as oil stains and dust may also be introduced, leading to simultaneous deterioration of the insulation performance (volume resistivity decreases by 10% - 15%) and appearance quality (defect rate increases by 3% - 5%) of subsequent products, and the comprehensive production cost increases by 20% - 25% compared to the theoretical value.

[0007] Furthermore, the fluidity of the glue needs to be guaranteed. If the viscosity of the glue increases and the fluidity deteriorates, the glue will be unevenly distributed on the silk thread and the penetration effect will be poor, which will cause unstable product quality during the dipping of precision silk threads.

[0008] To sum up, the development of a silk thread dipping device that can quickly achieve glue penetration into the interior of the silk thread, efficiently scrape the glue, achieve soft contact at the silk thread joints, and ensure the fluidity of the glue is of extremely important and urgent practical significance for improving the overall technical level of the silk thread processing industry, reducing production costs, improving product quality, and enhancing corporate market competitiveness. Summary of the invention

[0009] The purpose of the present invention is to provide a silk thread dipping device and a method of using the same, so as to solve the problems that the existing traditional immersion dipping machine relies on natural penetration, which is inefficient, time-consuming and has poor penetration effect, resulting in insufficient strength and wear resistance of the manufactured silk thread and being unable to meet high-end field standards. The existing scraping device is difficult to make soft contact with the silk thread joint, and the hard contact connector is easy to cut the silk thread, interrupting the production process and increasing costs. Moreover, if the fluidity of the glue cannot be guaranteed, the viscosity will increase and the fluidity will deteriorate, resulting in uneven distribution of the glue on the silk thread and poor penetration effect, thus affecting the technical problem of product quality stability of precision silk thread dipping.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a silk thread dipping device, comprising a base, a plc controller is arranged inside the base, the plc controller is used to control the temperature of the heater, a dipping box is arranged above the base, and its characteristic is that a heater is arranged at the bottom of the dipping box, a wire pressing platform is also arranged at the bottom of the dipping box, a scraper mother seat is arranged on one side of the wire pressing platform, a flexible scraper assembly is embedded and installed on the scraper mother seat, a roller wire pressing device is installed on the flexible scraper assembly and connected by bolts, the roller wire pressing device is in contact with the wire pressing platform, and the roller wire pressing device can be flexibly pressed on the silk thread while the flexible scraper assembly stabilizes the scraping of glue, so that the silk thread contacts with the glue faster, and the roller wire pressing device provides support for the flexible scraper assembly, distributed wire passing devices are arranged at the front and back of the dipping box, legs are arranged at the bottom of the scraper mother seat to form a doorway to facilitate the flow of glue, and a group of vertical wire grooves are arranged on the scraper mother seat.

[0011] Preferably, a switch is arranged at the bottom of the glue dipping box, an upper cover is arranged at the top of the glue dipping box, the glue dipping box and the upper cover are connected by a hinge, an operating handle is arranged on the glue dipping box, and a group of wire grooves are formed between the glue dipping box and the upper cover.

[0012] Preferably, the distributed wire-passing device comprises a chassis, on which a group of wire-passing rods are evenly arranged.

[0013] Preferably, the flexible scraper assembly includes a scraper, a limit plate, a scraper fork and a flexible spring member. A scraping groove is arranged in the scraper, a group of limit plates are evenly arranged in the scraper groove, the scraper fork is arranged between two limit plates, a flexible spring member is arranged to connect the scraper fork and the scraper, the flexible spring member is installed between the scraper fork and the scraper by bolt 2, a sliding outer tube is arranged inside the flexible spring member, a sliding inner tube is arranged inside the sliding outer tube for limiting sliding, a group of bolt holes are arranged on the side of the scraper, and the opening of the scraper fork gradually becomes larger from top to bottom.

[0014] Preferably, the roller pressing device includes a pressing block, a rotating rod, and a pressing wheel. A group of pressing wheel grooves are arranged in the pressing block, a pressing wheel is arranged in the pressing wheel groove, the rotating rod passes through the pressing wheel and the pressing block, and the rotation of the pressing wheel drives the rotating rod to rotate in the pressing block, rotating wheels are installed at both ends of the rotating rod, a group of rubber stripping plates are installed circumferentially on the rotating wheel, a wire passing groove is arranged at the front end of the pressing wheel groove, inclined tubes are arranged on both sides of the pressing block, a rectangular sleeve plate is arranged on the inclined tube, the rectangular sleeve plate is connected to the flexible rubber scraper assembly by bolts, and a circle of anti-slip grooves is arranged on the pressing wheel.

[0015] The method for using the device is characterized by comprising the following steps: Step 1: Add glue into the dipping box, heat the heater, and the PLC controller controls the heater to heat; Step 2: Open the upper cover of the dipping box, and the silk thread passes through the front distribution wire passing device in turn, passes over the top of the scraper mother seat, and passes through the distribution wire passing device at the other end of the dipping box. The flexible scraper assembly and the roller wire pressing device are combined and put into the dipping box. The flexible scraper assembly stabilizes the scraper and the roller wire pressing device can flexibly press on the silk thread, so that the silk thread contacts the glue faster, and the roller wire pressing device provides support for the flexible scraper assembly; Step 3: The wire bundle is pulled by an external winder, and the wire will be flattened instantly by the rotating wheel, so that it can better contact with the glue. The friction generated drives the rotating wheel to rotate, and the rotating rod rotates at the same time, prompting the glue plate to move, so that the glue flows and is heated evenly. At the same time, the glue scraping fork and the glue scraping mother seat flexibly cooperate with the glue scraping operation. If a protruding high point is encountered, it can be flexibly jumped over to avoid scraping off.

[0016] Compared with the prior art, the technical effects and advantages of the present invention are: Open the top cover of the dipping box, pass the silk thread through the distribution wire passing device in turn, pass it over the scraper mother seat, and pass it out from the other end of the dipping box. Then, install the flexible scraper assembly and the roller wire pressing device in the dipping box. During the working process, the roller wire pressing device can gently press on the silk thread, which not only allows the silk thread to contact the glue more quickly, but also provides stable support for the flexible scraper assembly, ensuring the stability and accuracy of the scraping process.

[0017] With the traction of the wire harness, the silk thread will be instantaneously flattened by the rotating wheel during movement, thereby increasing the contact area with the glue and more efficiently completing the glue dipping. The frictional force generated between the silk thread and the rotating wheel drives the rotating wheel to rotate, and the rotating rod connected thereto also rotates synchronously, thereby prompting the glue spreading plate to continuously stir the glue, making the glue evenly heated and more reasonably distributed. At the same time, the glue scraping fork and the glue scraping base cooperate to perform a flexible glue scraping operation. When encountering a prominent high point on the silk thread, the glue scraping fork can smoothly jump over it by virtue of its flexible characteristics, effectively avoiding breaking the silk thread and ensuring the continuity of production and product quality. Description of the Drawings

[0018] Figure 1 is a perspective view of the present invention; Figure 2 of the present invention Figure 1 partial enlarged view of part A; Figure 3 is a partial sectional perspective view of the present invention; Figure 4 is a perspective view of the combination of the flexible glue scraping assembly and the roller wire pressing device of the present invention; Figure 5 of the present invention Figure 4 partial enlarged view of part B; Figure 6 is a perspective view of the flexible glue scraping assembly of the present invention; Figure 7 is a perspective view of the glue scraping base of the present invention; Figure 8 is a partial top view of the roller wire pressing device of the present invention; Figure 9 is a combined perspective view of the sliding inner tube and the sliding outer tube of the present invention.

[0019] In the figure: 1. bottom platform; 2. plc controller; 3. glue dipping tank; 4. heater; 5. wire pressing platform; 6. glue scraping base; 7. flexible glue scraping assembly; 70. scraping groove; 9. roller wire pressing device; 79. bolt one; 8. distribution wire passing device; 61. leg; 62. vertical wire groove; 31. switch; 32. upper cover; 33. hinge; 34. operation handle; 35. wire passing groove one; 81. chassis; 82. passing lead screw; 71. scraping plate; 72. limiting plate; 73. glue scraping fork; 74. flexible spring member; 75. sliding outer tube; 76. sliding inner tube; 77. bolt hole; 91. pressing block; 92. rotating rod; 93. pressing wheel; 90. pressing wheel groove; 94. rotating wheel; 95. glue spreading plate; 96. wire passing groove two; 97. inclined tube; 98. rectangular sleeve plate. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0021] In one embodiment, referring to Figures 1 to 4 , a silk thread dipping device includes a base table 1, a plc controller 2 is arranged inside the base table 1, and a dipping tank 3 is arranged above the base table 1. It is characterized in that a heater 4 is arranged at the bottom of the dipping tank 3. Glue is added into the dipping tank 3, the heater 4 is heated, the plc controller 2 controls the heating of the heater 4, and a switch 31 controls the on-off of the heating circuit of the heater 4. A wire pressing platform 5 is also arranged at the bottom of the dipping tank 3. A scraping glue base 6 is arranged on one side of the wire pressing platform 5. A flexible scraping glue assembly 7 is embedded and installed on the scraping glue base 6. A roller wire pressing device 9 is installed on the flexible scraping glue assembly 7 and connected by a bolt 79. The roller wire pressing device 9 is in contact with the wire pressing platform 5. While the flexible scraping glue assembly 7 stably scrapes the glue, the roller wire pressing device 9 can be flexibly pressed on the silk thread, so that the silk thread can contact the glue faster. The roller wire pressing device 9 provides support for the flexible scraping glue assembly 7. Distribution wire passing devices 8 are arranged at the front and back of the dipping tank 3. Legs 61 are arranged at the bottom of the scraping glue base 6 to form a door opening for the convenience of glue flow. A group of vertical wire grooves 62 are arranged on the scraping glue base 6.

[0022] In one embodiment, referring to Figures 1 to 3 , a switch 31 is arranged at the bottom of the dipping tank 3, and the switch 31 controls the on-off of the heating circuit of the heater 4. An upper cover 32 is arranged at the top of the dipping tank 3. The dipping tank 3 and the upper cover 32 are connected by a hinge 33. An operation handle 34 is arranged on the dipping tank 3. A group of wire passing grooves one 35 are formed between the dipping tank 3 and the upper cover 32. The distribution wire passing device 8 includes a chassis 81, and a group of wire passing screws 82 are evenly arranged on the chassis 81 to facilitate guiding the silk thread.

[0023] In one embodiment, referring to Figure 6 and Figure 7The flexible scraper assembly 7 includes a scraper 71, a limiting plate 72, a scraper fork 73 and a flexible spring member 74. A scraper groove 70 is arranged in the scraper 71, and a group of limiting plates 72 are evenly arranged in the scraper groove 70. The scraper fork 73 is arranged between two limiting plates 72. A flexible spring member 74 is arranged between the scraper fork 73 and the scraper 71 to connect. The flexible spring member 74 is installed between the scraper fork 73 and the scraper 71 by bolt 2. A sliding outer tube 75 is arranged inside the flexible spring member 74. A sliding inner tube 76 is arranged inside the sliding outer tube 75 to limit the sliding movement. A group of bolt holes 77 are arranged on the side of the scraper 71. The opening of the scraper fork 73 gradually becomes larger from top to bottom. If a protruding high point is encountered, it can be flexibly jumped over to avoid scraping.

[0024] In one embodiment, see Figure 8 The roller pressing device 9 includes a pressing block 91, a rotating rod 92, and a pressing wheel 93. A group of pressing wheel grooves 90 are arranged in the pressing block 91, and a pressing wheel 93 is arranged in the pressing wheel groove 90. The rotating rod 92 passes through the pressing wheel 93 and the pressing block 91, and the rotation of the pressing wheel 93 drives the rotating rod 92 to rotate in the pressing block 91. Rotating wheels 94 are installed at both ends of the rotating rod 92. A group of rubber stripping plates 95 are installed circumferentially on the rotating wheel 94. A wire passing groove 96 is arranged at the front end of the pressing wheel groove 90. Oblique tubes 97 are arranged on both sides of the pressing block 91, and a rectangular sleeve plate 98 is arranged on the inclined tube 97. The rectangular sleeve plate 98 and the flexible scraper group Part 7 is connected by bolt 79, which is convenient for adjusting the height. The flexible scraper assembly 7 and the roller wire pressing device 9 press the silk thread and put it into the dipping box 3. The silk thread passes through the pressing wheel groove 90, the pressing wheel 93, and the wire passing groove 96. The pressing wheel 93 is provided with a circle of anti-slip grooves. The pressing wheel 93 presses the silk thread and cooperates with the pressing block 91 to make the silk thread flatten and loosen and contact the glue faster. The roller wire pressing device 9 can flexibly press on the silk thread to flatten the silk thread. The roller wire pressing device 9 provides support for the flexible scraper assembly 7 to avoid the influence of the gravity of the flexible scraper assembly 7 itself and press on the silk thread.

[0025] In one embodiment, the method of using the present invention; Step 1: Add glue into the dipping box 3, heat the heater 4, and the PLC controller 2 controls the heater 4 to heat; Step 2: Open the upper cover 32 of the glue dipping box 3 with the assistance of an external lifting mechanism, and the staff lifts the flexible glue scraping assembly 7 and the roller wire pressing device 9. The silk thread passes through the front end distribution wire passing device 8 in turn, passes over the top of the glue scraping mother seat 6, and passes through the distribution wire passing device 8 at the other end of the glue dipping box 3. The flexible glue scraping assembly 7 and the roller wire pressing device 9 are combined and put into the glue dipping box 3. The flexible glue scraping assembly 7 and the roller wire pressing device 9 press the silk thread and put it into the glue dipping box 3. While the flexible glue scraping assembly 7 stabilizes the glue scraping, the roller wire pressing device 9 can flexibly press on the silk thread, so that the silk thread contacts the glue faster, and the roller wire pressing device 9 provides support for the flexible glue scraping assembly 7; Step 3: The silk thread passes through the press wheel groove 90, press wheel 93, and wire passing groove 2 96 in the roller wire pressing device 9, and is tractioned by an external winding machine for the silk thread bundle. The press wheel 93 presses the silk thread and cooperates with the pressing block 91, so that the silk thread becomes flat and loose and contacts the glue faster. The silk thread will be instantaneously flattened by the press wheel 93, better contacting the glue. The generated frictional force drives the rotation of the rotating wheel 94, and the rotating rod 92 rotates simultaneously, prompting the glue spreading plate 95 to move, making the glue flow and being heated evenly. At the same time, the glue scraping fork 73 and the glue scraping base 6 are flexibly matched for glue scraping operation. The roller wire pressing device 9 provides support for the flexible glue scraping assembly 7. During the glue scraping operation, the flexible spring member 74 is installed between the glue scraping fork 73 and the scraping plate 71 through the second bolt. A sliding outer tube 75 is arranged inside the flexible spring member 74 for unloading force to achieve soft contact. The glue scraping fork 73 and the glue scraping base 6 are flexibly matched for glue scraping operation. A set of bolt holes 77 are arranged on the side of the scraping plate 71, which are convenient for assembling with the rectangular sleeve plate 98. The opening of the glue scraping fork 73 gradually becomes larger from top to bottom. If encountering a protruding high point, to avoid the influence of the self-weight of the flexible glue scraping assembly 7 on the silk thread, when encountering a protruding high point, it can flexibly jump over to avoid cutting off the silk thread.

[0026] Step 3: Assemble the roller wire pressing device 9 and the flexible glue scraping assembly 7, press the silk thread. The silk thread is limited in the press wheel groove 90 of the pressing block 91, and the silk thread is located below the rotating wheel 94. The pressing block 91 is placed on the wire pressing platform 5, and the wire bundle is tractioned and wound by an external winding mechanism. The silk thread will be instantaneously flattened by the rotating wheel 94, better contacting the glue. The generated frictional force drives the rotation of the rotating wheel 94, and the rotating rod 92 rotates simultaneously, prompting the glue spreading plate 95 to move, making the glue flow and the glue being heated evenly. While the flexible glue scraping assembly 7 stably scrapes the glue, the roller wire pressing device 9 can be flexibly pressed on the silk thread, making the silk thread contact the glue faster. The roller wire pressing device 9 provides support for the flexible glue scraping assembly 7, facilitating installation and avoiding the silk thread threading operation, which is convenient and fast. At the same time, it also provides stability for the glue scraping operation of the flexible glue scraping assembly 7.

Claims

1. A silk thread dipping device, comprising a base (1), a PLC controller (2) is arranged inside the base (1), and a dipping box (3) is arranged above the base (1), characterized in that: A heater (4) is arranged at the bottom of the glue dipping box (3), a wire pressing platform (5) is also arranged at the bottom of the glue dipping box (3), a glue scraping mother seat (6) is arranged on one side of the wire pressing platform (5), a flexible glue scraping assembly (7) is embedded and installed on the glue scraping mother seat (6), a roller wire pressing device (9) is installed on the flexible glue scraping assembly (7) and connected by a bolt (79), the roller wire pressing device (9) is in contact with the wire pressing platform (5), and a distributed wire passing device (8) is arranged at the front and rear of the glue dipping box (3), a supporting leg (61) is arranged at the bottom of the glue scraping mother seat (6), and a group of vertical wire grooves (62) are arranged on the glue scraping mother seat (6).

2. The device according to claim 1, characterized in that: A switch (31) is arranged at the bottom of the glue dipping box (3), an upper cover (32) is arranged at the top of the glue dipping box (3), the glue dipping box (3) and the upper cover (32) are connected via a hinge (33), an operating handle (34) is arranged on the glue dipping box (3), and a set of wire grooves (35) are formed between the glue dipping box (3) and the upper cover (32).

3. The device according to claim 1, characterized in that: The distributed wire-passing device (8) comprises a chassis (81), on which a group of wire-passing rods (82) are evenly arranged.

4. The device according to claim 1, characterized in that: The flexible scraper assembly (7) comprises a scraper plate (71), a limit plate (72), a scraper fork (73) and a flexible spring member (74). A scraper groove (70) is arranged in the scraper plate (71). A group of limit plates (72) are evenly arranged in the scraper groove (70). The scraper fork (73) is arranged between two limit plates (72). A flexible spring member (74) is arranged between the scraper fork (73) and the scraper plate (71) to connect them. The flexible spring member (74) is installed between the scraper fork (73) and the scraper plate (71) by bolt 2. A sliding outer tube (75) is arranged inside the flexible spring member (74). A sliding inner tube (76) is arranged inside the sliding outer tube (75) for limiting sliding. A group of bolt holes (77) are arranged on the side of the scraper plate (71). The opening of the scraper fork (73) gradually increases from top to bottom.

5. The device according to claim 1, characterized in that: The roller wire pressing device (9) comprises a pressing block (91), a rotating rod (92), and a pressing wheel (93). A group of pressing wheel grooves (90) are arranged in the pressing block (91), a pressing wheel (93) is arranged in the pressing wheel groove (90), the rotating rod (92) penetrates the pressing wheel (93) and the pressing block (91), and the pressing wheel (93) rotates to drive the rotating rod (92) to rotate in the pressing block (91), rotating wheels (94) are installed at both ends of the rotating rod (92), a group of rubber stripping plates (95) are installed circumferentially on the rotating wheel (94), a wire passing groove (96) is arranged at the front end of the pressing wheel groove (90), inclined tubes (97) are arranged on both sides of the pressing block (91), a rectangular sleeve plate (98) is arranged on the inclined tube (97), the rectangular sleeve plate (98) is connected to the flexible rubber scraping component (7) by bolts (79), and a circle of anti-slip grooves is arranged on the pressing wheel (93).

6. A method for using the device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Add glue into the glue dipping box (3), heat the heater (4), and the PLC controller (2) controls the heater (4) to heat; Step 2: The upper cover (32) of the glue dipping box (3) is opened with the assistance of an external lifting mechanism. The staff lifts the flexible glue scraping assembly (7) and the roller wire pressing device (9). The silk thread passes through the front end distribution wire passing device (8) in turn, passes over the top of the glue scraping mother seat (6), and passes out from the distribution wire passing device (8) at the other end of the glue dipping box (3). The flexible glue scraping assembly (7) and the roller wire pressing device (9) are combined and placed in the glue dipping box (3). The flexible glue scraping assembly (7) and the roller wire pressing device (9) press the silk thread and place it in the glue dipping box (3). While the flexible glue scraping assembly (7) is stabilizing the glue scraping, the roller wire pressing device (9) can be flexibly pressed on the silk thread, so that the silk thread contacts the glue more quickly. The roller wire pressing device (9) provides support for the flexible glue scraping assembly (7); Step 3: The silk thread passes through the pressing wheel groove (90), the pressing wheel (93), and the second wire groove (96) in the roller pressing device (9), and the silk thread bundle is pulled by the external winding machine. The pressing wheel (93) presses the silk thread and cooperates with the pressing block (91) to make the silk thread flat and loose so as to contact the glue faster. The silk thread will be instantly flattened by the pressing wheel (93) and better contact the glue. The friction force generated drives the rotating wheel (94) to rotate, and the rotating rod (92) rotates at the same time, prompting the glue plate (95) to move, so that the glue flows and is heated evenly. At the same time, the scraping fork (73) and the scraping mother seat (6) flexibly cooperate in the scraping operation. The roller pressing device (9) provides support for the flexible scraping assembly (7) to avoid the influence of the gravity of the flexible scraping assembly (7). If a protruding high point is encountered when pressing on the silk thread, it can flexibly jump over to avoid scraping.

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