An outer layer width shrinkage control device for impregnated fabric and a method of using the same

Abstract

The application discloses a kind of impregnated fabric outer layer width shrinkage control device and its using method, it is related to impregnated fabric processing technical field, including support roller, and setting up between mounting bracket spread structure;The front surface of mounting bracket is fixedly installed with the positioning structure for the expansion of the two sides of impregnated fabric, and the opposite side of positioning structure is fixedly installed with the pressing mechanism for the extrusion of the two sides of impregnated fabric.The application is sequentially inserted between support roller and spreader roller, leveling plate and bearing plate by impregnated fabric, with the conveying of impregnated fabric, spreader roller drives screw convex on it to rotate together, utilizes the spiral thread of screw convex surface from middle to two ends reverse rotation, generates the friction force outward, spreads the width of impregnated fabric, inhibits the shrinkage of impregnated fabric outer layer width, and utilizes the component force from center to two sides formed by V-shaped leveling plate, so that cloth is flattened and stretched outward, and inhibits the width shrinkage of impregnated fabric.

Description

Technical Field

[0001] This invention relates to the field of impregnated fabric processing technology, and in particular to a device for controlling the shrinkage of the outer layer width of impregnated fabric and its usage method. Background Technology

[0002] Impregnated fabric processing typically involves soaking ordinary fabric in a special adhesive solution and undergoing a series of treatments to significantly enhance its performance. The adhesive solution firmly bonds the fibers into a whole, making the fabric's tensile and tear resistance far exceed that of ordinary fabric. It can withstand high temperatures and chemical corrosion, and has a wider range of applications.

[0003] Rubber-impregnated fabric is an important reinforcing material for tires and other rubber products, and the stability of its width directly affects the processing quality of downstream calendering processes and the performance of the final product. However, during the heat treatment of rubber-impregnated fabric, due to the combined effects of heat, tension, and rubber solution, significant shrinkage stress will occur in the weft direction of the fabric, leading to narrowing of the width and shrinkage of the fabric edges, which adversely affects the quality of the finished tire. Summary of the Invention

[0004] The purpose of this invention is to provide a device for controlling the shrinkage of the outer layer width of a PVC-impregnated fabric and its usage method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for controlling the shrinkage of the outer layer width of a dipped fabric, comprising:

[0006] Support rollers;

[0007] Both ends of the support roller are rotatably connected to mounting frames via bearings. A spreading structure for spreading the dipped cloth toward the edge is provided between the mounting frames, which is located above the support roller.

[0008] The mounting frame is fixedly installed with a positioning structure for expanding the two sides of the impregnated cloth. The positioning structure is located on both sides of the spreading structure. On the opposite side of the positioning structure, a pressing mechanism for squeezing the two sides of the impregnated cloth is fixedly installed. The pressing mechanism moves together with the positioning structure.

[0009] Preferably, the spreading structure includes:

[0010] A spreading roller is positioned above a support roller, and the two ends of the spreading roller are rotatably connected to a mounting frame via bearings.

[0011] Threaded protrusions, which are spirally arranged around the outer wall of the spreading roller;

[0012] A rubber pad is fixedly installed along the outer wall of the threaded protrusion.

[0013] Preferably, the spreading structure further includes:

[0014] The gears are fixedly mounted on the rotating shaft on the same side of the support roller and the spreading roller. The gears are arranged vertically and are meshed with each other.

[0015] A servo motor is disposed on one side of the support roller, and the output end of the servo motor is used for shaft drive connection of one of the gears;

[0016] A protective housing is fixedly installed on one side of the outer wall of one of the mounting brackets. A servo motor is fixedly installed on one side of the outer wall of the protective housing. The gear is located inside the protective housing.

[0017] Preferably, the positioning structure includes:

[0018] A fixing frame, one end of which is fixedly installed to the front of the mounting frame, and the fixing frame is disposed on both sides of the support roller and the spreading roller;

[0019] The positioning roller is located inside the fixed frame and is positioned vertically.

[0020] An extrusion section is disposed at one end of a positioning roller. The extrusion section is frustum-shaped and the extrusion section of the positioning roller is positioned correspondingly to it.

[0021] A support portion is disposed at the other end of the positioning roller, and the support portion is cylindrical.

[0022] Preferably, the positioning structure further includes:

[0023] The mounting shaft is fixedly mounted on one end of the positioning roller, and the mounting shaft is rotatably connected to the fixing frame through a bearing;

[0024] The plate is staggered with the positioning roller, and one end of the plate is fixedly connected to the inner side wall of the fixing frame.

[0025] A support plate is disposed below the flat plate and is located between multiple positioning rollers.

[0026] Preferably, the positioning structure further includes:

[0027] The mounting hole is located in the middle of one end of one of the positioning rollers and is circular in shape.

[0028] The mounting block has one end rotatably inserted into the mounting hole, and the other end is fixedly connected to one side of the lower surface of the support plate. The mounting block is L-shaped.

[0029] Preferably, the pressing mechanism includes:

[0030] A fixing block is fixedly connected to the other end of the upper positioning roller, and the fixing block is arranged in a convex shape;

[0031] The mounting slots are arranged in a circular array at equal intervals on the fixing block;

[0032] The ball bearing is slidably inserted into the mounting groove and is cylindrical in shape.

[0033] Preferably, the pressing mechanism further includes:

[0034] A rotating shaft is fixedly connected to the middle of one end of the ball bearing;

[0035] A ball bearing bracket is slidably inserted into a mounting groove, and is rotatably connected to one end of a rotating shaft. The ball bearing bracket is U-shaped.

[0036] A compression spring is disposed in a mounting groove, and one end of the compression spring is fixedly connected to the bottom end of the ball bearing bracket.

[0037] The positioning groove is formed on the inner wall of the mounting groove. The positioning groove is vertically arranged and is slidably inserted into one end of the rotating shaft.

[0038] Preferably, the threaded protrusion is integrally formed with the spreading roller, the positioning roller corresponds to the positions of the support roller and the spreading roller respectively, the flat plate is V-shaped, and the fixing block corresponds to the position of the support part of the lower positioning roller.

[0039] A method for using a device for controlling the shrinkage of the outer layer width of a PVC-impregnated fabric includes the following steps:

[0040] Step 1: By passing the processed dipped fabric sequentially through the support roller and spreading roller, the flat plate and the carrier plate, and the positioning roller, the dipped fabric is moved between the support roller and spreading roller, the flat plate and the carrier plate, and the positioning roller as it is conveyed and wound up.

[0041] Step 2: Start the servo motor to drive the spreading roller to rotate. As the threaded protrusions on the spreading roller rotate, an outward frictional force is generated to widen the impregnated fabric.

[0042] Step 3: At the same time, as the impregnated cloth moves between the flat plate and the support plate, the lower surface of the flat plate comes into contact with the impregnated cloth, forming a force from the center to both sides, thereby smoothing the cloth and extending it outward.

[0043] Step 4: The two sides of the dipped cloth move between the upper and lower positioning rollers. The squeezing parts of the two positioning rollers squeeze the two sides of the dipped cloth, squeezing and positioning the edge of the dipped cloth. The ball at one end of the upper positioning roller is in contact with the upper surface of the dipped cloth. Using the elasticity of the compression spring, the ball is pushed downward to squeeze the dipped cloth.

[0044] The technical effects and advantages of this invention are as follows:

[0045] (1) The present invention is achieved by sequentially interlacing the dipped fabric between the support roller and the spreading roller, the straightening plate and the carrying plate. As the dipped fabric is conveyed, the spreading roller drives the threaded protrusions on it to rotate together. The spiral pattern of the threaded protrusions rotating in opposite directions from the middle to both ends generates outward friction force to widen the dipped fabric and suppress the shrinkage of the outer layer width of the dipped fabric. In addition, the V-shaped straightening plate forms a component force from the center to both sides, thereby smoothing the fabric and extending it outward, which plays a role in suppressing the width shrinkage of the dipped fabric.

[0046] (2) The present invention positions one side of the dipped cloth by interlacing the two sides of the dipped cloth between the positioning rollers. The inclined surface of the squeezing part of the positioning roller squeezes the upper and lower surfaces of the dipped cloth. At the same time, the fixing block and the ball rotate together with the positioning roller. The elasticity of the compression spring pushes the ball bracket and the ball to move outward of the mounting groove, ensuring that the outer wall of the ball is stably squeezed against the upper surface of the edge of the dipped cloth, and ensuring that the edge positions of both sides of the dipped cloth are stable. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0048] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0049] Figure 2 This is a schematic diagram of the structure of the flattening roller of the present invention;

[0050] Figure 3 This is a front cross-sectional view of the flattening roller structure of the present invention;

[0051] Figure 4 This is a schematic diagram of the positioning roller structure of the present invention;

[0052] Figure 5 This is a schematic diagram of the front structure of the positioning roller of the present invention;

[0053] Figure 6 This is a side cross-sectional view of the fixing block of the present invention;

[0054] Figure 7This is a side cross-sectional view of the ball bearing structure of the present invention.

[0055] In the attached diagram: 1. Support roller; 2. Mounting frame; 3. Fabric spreading structure; 31. Fabric spreading roller; 32. Threaded protrusion; 33. Rubber pad; 34. Gear; 35. Servo motor; 36. Protective shell; 4. Positioning structure; 41. Fixing frame; 42. Positioning roller; 43. Mounting shaft; 44. Flat plate; 45. Bearing plate; 46. Mounting hole; 47. Mounting block; 5. Pressing mechanism; 51. Fixing block; 52. Mounting groove; 53. Ball bearing; 54. Rotating shaft; 55. Ball bearing bracket; 56. Compression spring; 57. Positioning groove. Detailed Implementation

[0056] 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.

[0057] This invention provides, for example Figures 1-7 The device for controlling the width shrinkage of the outer layer of a PVC-coated fabric includes a support roller 1 that contacts the lower surface of the PVC-coated fabric to support it and ensure stable width shrinkage control. Both ends of the support roller 1 are rotatably connected to mounting frames 2 via bearings, allowing for stable mounting of the support roller 1. A spreading structure 3, positioned above the support roller 1, is provided between the mounting frames 2 to spread the PVC-coated fabric towards the edge, facilitating control of the shrinkage at the edge of the fabric. A positioning structure 4 for expanding the PVC-coated fabric on both sides is fixedly mounted on the front of the mounting frame 2. The positioning structure 4 is located on both sides of the spreading structure 3, pressing and positioning the edge of the PVC-coated fabric to ensure stable expansion at the edge. A pressing mechanism 5 for pressing the PVC-coated fabric on both sides is fixedly mounted on the opposite side of the positioning structure 4, moving with the positioning structure 4 to improve the stability of the PVC-coated fabric.

[0058] The spreading structure 3 includes a spreading roller 31, a threaded protrusion 32, a rubber pad 33, a gear 34, a servo motor 35, and a protective shell 36. The spreading roller 31 is positioned above the support roller 1. The two ends of the spreading roller 31 are rotatably connected to the mounting frame 2 via bearings. The spreading roller 31 rotates between the two mounting frames 2 to spread the dipped fabric from the center to the edge, preventing excessive shrinkage of the outer layer. The threaded protrusion 32 is spirally arranged around the outer wall of the spreading roller 31. The threaded protrusion 32 is integrally formed with the spreading roller 31 and rotates together with the spreading roller 31. Utilizing the friction between its surface and the upper surface of the dipped fabric, and the spiral pattern of the threaded protrusion 32 rotating in opposite directions from the center to both ends, outward friction is generated to widen the dipped fabric and suppress shrinkage of the outer layer width. The rubber pad 33 is fixedly installed along the outer wall of the threaded protrusion 32, and the threaded protrusion 32 contacts the upper surface of the dipped fabric through the rubber pad 33. The system improves the frictional resistance between the threaded protrusion 32 and the impregnated cloth, and prevents the threaded protrusion 32 from damaging the impregnated cloth. The gear 34 is fixedly installed on the shaft on the same side of the support roller 1 and the spreading roller 31. The gear 34 is arranged vertically and meshed with each other. One end of the support roller 1 and the spreading roller 31 are meshed with the gear 34, so that the support roller 1 and the spreading roller 31 rotate in opposite directions. The servo motor 35 is set on one side of the support roller 1. The output end of the servo motor 35 is used for shaft transmission connection of one of the gears 34. The servo motor 35 is electrically connected to an external power supply through an external switch to drive the support roller 1 and one of the gears 34 to rotate, thereby driving the spreading roller 31 and the threaded protrusion 32 to rotate. The protective shell 36 is fixedly installed on one side of the outer wall of one of the mounting brackets 2. One side of the outer wall of the protective shell 36 is fixedly installed with the servo motor 35. The gear 34 is set inside the protective shell 36, and the protective shell 36 is used to shield and protect the gear 34.

[0059] The positioning structure 4 includes a fixing frame 41, a positioning roller 42, an extrusion section, a support section, a mounting shaft 43, a leveling plate 44, a bearing plate 45, mounting holes 46, and a mounting block 47. One end of the fixing frame 41 is fixedly installed to the front of the mounting frame 2. The fixing frame 41 is located on both sides of the support roller 1 and the spreading roller 31, and is used to install the positioning roller 42. The positioning roller 42 is located inside the fixing frame 41 and is arranged vertically, corresponding to the positions of the support roller 1 and the spreading roller 31. The extrusion section is located at one end of the positioning roller 42 and is frustum-shaped with an inclined outer wall. The two positioning rollers 42... The extrusion sections of the positioning rollers 42 are positioned corresponding to each other. One side of the edge of the dipped fabric is inserted between the extrusion sections of the two positioning rollers 42. The outer walls of the extrusion sections press against the upper and lower surfaces of the dipped fabric, respectively, to position one side of the dipped fabric. A support section is located at the other end of the positioning roller 42. The support section is cylindrical and is used to support one side of the dipped fabric. The extrusion sections and the support section constitute the entire positioning roller 42. A mounting shaft 43 is fixedly installed at one end of the positioning roller 42. The mounting shaft 43 is rotatably connected to the fixing frame 41 through a bearing. The positioning roller 42 is rotatably connected to the fixing frame 41 through the mounting shaft 43, so that the positioning roller 42 rotates around the mounting shaft 43, facilitating rotation. The impregnated fabric is conveyed between two positioning rollers 42; the flat plate 44 is staggered with the positioning rollers 42, and the flat plate 44 is V-shaped. One end of the flat plate 44 is fixedly connected to the inner wall of the fixing frame 41, and the fold in the middle of the flat plate 44 faces the spreading roller 31. Its lower surface is pressed against the upper surface of the impregnated fabric by a rubber block. When the impregnated fabric between the support roller 1 and the spreading roller 31 is conveyed, it passes between the flat plate 44 and the support plate 45. The V-shaped flat plate 44 forms a force component from the center to both sides, thereby smoothing the fabric and extending it outward. The support plate 45 is located below the flat plate 44 and is located between the multiple positioning rollers 42. Between them, the upper surface of the support plate 45 is in contact with the lower surface of the impregnated cloth to support the impregnated cloth and ensure that the entire plate 44 can stably extend the impregnated cloth; the mounting hole 46 is set in the middle of one end of one of the positioning rollers 42, and the mounting hole 46 is set in a circular hole shape to accommodate the mounting block 47; one end of the mounting block 47 is rotatably inserted into the mounting hole 46 without obstructing the rotation of the positioning roller 42, and the other end of the mounting block 47 is fixedly connected to one side of the lower surface of the support plate 45. The mounting block 47 is set in an L-shape. Multiple mounting blocks 47 are used to connect the support plate 45 and multiple positioning rollers 42 to ensure the stable installation of the support plate 45.

[0060] The pressing mechanism 5 includes a fixed block 51, a mounting groove 52, a ball bearing 53, a rotating shaft 54, a ball bearing bracket 55, a compression spring 56, and a positioning groove 57. The fixed block 51 is fixedly connected to the other end of the upper positioning roller 42. The fixed block 51 is convex in shape and corresponds to the support part of the lower positioning roller 42. The fixed block 51 is positioned above the rubber-impregnated cloth and is used to install the ball bearing 53. The mounting groove 52 is arranged in a circular array at equal intervals on the fixed block 51 and is used to install the ball bearing 53. The ball bearing 53 is slidably inserted into the mounting groove 52. The ball bearing 53 is cylindrical and slides and rotates within the mounting groove 52. The fixed block 51 rotates together with the positioning roller 42, driving the ball bearing 53 to rotate, so that the ball bearing 53 maintains the squeezing effect on the surface of the dipped cloth. The rotating shaft 54 ​​is fixedly connected to the middle of one end of the ball bearing 53, and the ball bearing 53 rotates around the rotating shaft 54. The ball bearing bracket 55 is slidably inserted into the mounting groove 52, and the ball bearing bracket 55 and the rotating shaft 54 ​​are connected to the ball bearing 53. One end of the rotating shaft 54 ​​is rotatably connected, and the ball bearing bracket 55 is U-shaped. The ball 53 is rotatably connected to the ball bearing bracket 55 via the rotating shaft 54, allowing the ball 53 to rotate on the ball bearing bracket 55. The ball 53 maintains a rolling connection with the dipped cloth, facilitating the conveying of the dipped cloth. The compression spring 56 is disposed in the mounting groove 52, and one end of the compression spring 56 is fixedly connected to the bottom end of the ball bearing bracket 55. The compression spring 56 is always in a compressed state, and the elasticity of the compression spring 56 pushes the ball bearing bracket 55. The ball bearing 53 moves outward from the mounting groove 52, ensuring that the outer wall of the ball bearing 53 stably presses against the upper surface of the edge of the dipped cloth. The positioning groove 57 is opened on the inner wall of the mounting groove 52. The positioning groove 57 is vertically set and is slidably inserted into one end of the rotating shaft 54. The positioning groove 57 is used to install and accommodate the rotating shaft 54. As the ball bearing 53 moves in the mounting groove 52, it drives one end of the rotating shaft 54 ​​to slide along the positioning groove 57, which limits the movement of the ball bearing 53.

[0061] A method for using a device for controlling the shrinkage of the outer layer width of a PVC-impregnated fabric includes the following steps:

[0062] Step 1: By passing the processed dipped fabric sequentially through the support roller 1 and the spreading roller 31, the flat plate 44 and the carrier plate 45, and the positioning roller 42, the dipped fabric is moved between the support roller 1 and the spreading roller 31, the flat plate 44 and the carrier plate 45, and the positioning roller 42 as it is conveyed and wound up. During the conveying process of the dipped fabric, its width is stretched and its edges are positioned.

[0063] Step 2: Start the servo motor 35 to drive the spreading roller 31 to rotate. As the threaded protrusion 32 on the spreading roller 31 rotates, it generates an outward frictional force to widen the impregnated cloth and reduce the shrinkage effect of the impregnated cloth.

[0064] Step 3: At the same time, as the dipped cloth moves between the flat plate 44 and the support plate 45, the lower surface of the flat plate 44 comes into contact with the dipped cloth, forming a force from the center to both sides, thereby smoothing the cloth and extending it outward, and suppressing the shrinkage at the edge of the dipped cloth.

[0065] Step 4: The two sides of the dipped cloth move between the upper and lower positioning rollers 42. The squeezing parts of the two positioning rollers 42 squeeze the two sides of the dipped cloth to squeeze and position the edges of the dipped cloth. The ball 53 at one end of the upper positioning roller 42 is in contact with the upper surface of the dipped cloth. Using the elastic action of the compression spring 56, the ball 53 is pushed downward to squeeze the dipped cloth, ensuring that the edge positions of the dipped cloth on both sides are stable.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for controlling the shrinkage of the outer layer width of a rubber-impregnated fabric, characterized in that, include: Support roller (1); Both ends of the support roller (1) are rotatably connected to the mounting frame (2) via bearings. A spreading structure (3) for spreading the impregnated cloth toward the edge is provided between the mounting frames (2), which is located above the support roller (1). The mounting frame (2) is fixedly mounted with a positioning structure (4) for expanding the two sides of the impregnated cloth. The positioning structure (4) is located on both sides of the spreading structure (3). A pressing mechanism (5) for squeezing the two sides of the impregnated cloth is fixedly mounted on the opposite side of the positioning structure (4). The pressing mechanism (5) moves together with the positioning structure (4).

2. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 1, characterized in that, The spreading structure (3) includes: The spreading roller (31) is positioned above the support roller (1), and the two ends of the spreading roller (31) are rotatably connected to the mounting frame (2) through bearings; Threaded protrusion (32) is spirally arranged around the outer wall of the spreading roller (31); A rubber pad (33) is fixedly installed along the outer wall of the threaded protrusion (32).

3. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 2, characterized in that, The spreading structure (3) also includes: Gear (34), the gear (34) is fixedly installed on the rotating shaft on the same side of the support roller (1) and the spreading roller (31), the gear (34) is arranged vertically, and the gears (34) are meshed together; Servo motor (35), the servo motor (35) is disposed on one side of the support roller (1), and the output end of the servo motor (35) is used for shaft drive connection of one of the gears (34); A protective shell (36) is fixedly installed on one side of the outer wall of one of the mounting brackets (2). One side of the outer wall of the protective shell (36) is fixedly installed with a servo motor (35). The gear (34) is located inside the protective shell (36).

4. The device for controlling the shrinkage of the outer layer width of a PVC-coated fabric according to claim 3, characterized in that, The positioning structure (4) includes: A fixing frame (41) is fixedly installed at one end to the front of the mounting frame (2), and the fixing frame (41) is located on both sides of the support roller (1) and the spreading roller (31); Positioning roller (42), the positioning roller (42) is located inside the fixed frame (41), and the positioning roller (42) is arranged vertically; The extrusion section is located at one end of the positioning roller (42). The extrusion section is shaped like a frustum and the extrusion section of the positioning roller (42) is positioned accordingly. The support part is disposed at the other end of the positioning roller (42) and is cylindrical in shape.

5. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 4, characterized in that, The positioning structure (4) also includes: Mounting shaft (43) is fixedly mounted on one end of positioning roller (42), and mounting shaft (43) is rotatably connected to fixing frame (41) through bearing; A flat plate (44) is provided, which is staggered with the positioning roller (42). One end of the flat plate (44) is fixedly connected to the inner wall of the fixing frame (41). The support plate (45) is disposed below the flat plate (44) and is located between a plurality of positioning rollers (42).

6. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 5, characterized in that, The positioning structure (4) also includes: Mounting hole (46), the mounting hole (46) is located in the middle of one end of one of the positioning rollers (42), and the mounting hole (46) is round; Mounting block (47), one end of which is rotatably inserted into mounting hole (46), and the other end of which is fixedly connected to one side of the lower surface of bearing plate (45). Mounting block (47) is L-shaped.

7. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 6, characterized in that, The pressing mechanism (5) includes: A fixing block (51) is fixedly connected to the other end of the upper positioning roller (42), and the fixing block (51) is convex in shape. The mounting slots (52) are arranged in a ring array at equal intervals on the fixing block (51); The ball (53) is slidably inserted into the mounting groove (52) and is cylindrical in shape.

8. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 7, characterized in that, The pressing mechanism (5) further includes: A rotating shaft (54) is fixedly connected to the middle of one end of a ball (53); A ball bearing bracket (55) is slidably inserted into the mounting groove (52). The ball bearing bracket (55) is rotatably connected to one end of the rotating shaft (54). The ball bearing bracket (55) is U-shaped. Compression spring (56), the compression spring (56) is disposed in the mounting groove (52), and one end of the compression spring (56) is fixedly connected to the bottom end of the ball bearing bracket (55); The positioning groove (57) is opened on the inner wall of the mounting groove (52). The positioning groove (57) is vertically arranged and is slidably inserted into one end of the rotating shaft (54).

9. The device for controlling the shrinkage of the outer layer width of a dipped fabric according to claim 8, characterized in that, The threaded protrusion (32) is integrally set with the spreading roller (31), the positioning roller (42) corresponds to the position of the support roller (1) and the spreading roller (31) respectively, the flat plate (44) is set in a V shape, and the fixing block (51) corresponds to the position of the support part of the lower positioning roller (42).

10. A method of using a device for controlling the shrinkage of the outer layer width of a PVC-impregnated fabric, characterized in that, This method, applied to the outer layer width shrinkage control device of the impregnated fabric as described in any one of claims 1-9, specifically includes the following steps: Step 1: By passing the processed dipped cloth sequentially through the support roller (1) and the spreading roller (31), the flat plate (44) and the carrier plate (45), and the positioning roller (42), the dipped cloth is driven to move between the support roller (1) and the spreading roller (31), the flat plate (44) and the carrier plate (45), and the positioning roller (42) as the dipped cloth is conveyed and wound up; Step 2: Start the servo motor (35) to drive the spreading roller (31) to rotate. As the threaded protrusion (32) on the spreading roller (31) rotates, an outward frictional force is generated to spread the impregnated cloth. Step 3: At the same time, as the impregnated cloth moves between the flat plate (44) and the support plate (45), the lower surface of the flat plate (44) comes into contact with the impregnated cloth, forming a force from the center to both sides, thereby smoothing the cloth and extending it outward. Step 4: The two sides of the dipped cloth move between the upper and lower positioning rollers (42). The squeezing parts of the two positioning rollers (42) squeeze the two sides of the dipped cloth and squeeze and position the edge of the dipped cloth. The ball (53) at one end of the upper positioning roller (42) is in contact with the upper surface of the dipped cloth. Using the elastic action of the compression spring (56), the ball (53) is pushed down to squeeze the dipped cloth.

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