Full-roller type forming mechanism and groove-shaped glass forming equipment

Abstract

The invention discloses a full-roller type forming mechanism and groove-shaped glass forming equipment. The full-roller type forming mechanism comprises a rack, a conveying roller assembly, a fixed shaft, a pressing roller, a clamping roller assembly and a forming roller assembly. A fixed shaft is arranged above the conveying roller assembly, a pressing roller is rotationally connected to the fixed shaft, a distance is reserved between the pressing roller and the conveying roller assembly, clamping roller assemblies are arranged on the two sides of the pressing roller, each clamping roller assembly comprises at least two clamping roller bodies capable of generating relative rotation, and a distance is reserved between the clamping roller bodies. And a forming roller assembly is correspondingly arranged on the front side of the clamping roller assembly and is provided with a plurality of rolling surfaces which are smoothly transited from the conveying roller assembly to the clamping roller assembly. The method has the beneficial effects that on one hand, the extremely high forming yield greatly reduces waste products and rework; and on the other hand, the abrasion of the roller piece is far slower than that of a traditional forming block, the maintenance cost and the downtime are remarkably reduced, meanwhile, the service life of equipment is prolonged, and finally the crossing from frictional abrasion to flexible forming is achieved.

Description

Technical Field

[0001] This invention relates to glass production, and more particularly to a full-roll forming mechanism and a trough-shaped glass forming equipment. Background Technology

[0002] Channel glass, a type of architectural glass material with a unique cross-sectional shape, is highly favored in the construction industry due to its excellent light transmission, good thermal insulation, and high mechanical strength. It is not only convenient to install and aesthetically pleasing, but also effectively saves building materials, offering the dual advantages of practicality and aesthetics. Its design options are diverse, encompassing fine textures, transparent versions, and colored series, flexibly adapting to diverse architectural style needs. Furthermore, channel glass is a non-combustible material with a high fire resistance rating, providing reliable protection for building safety.

[0003] Existing glass forming processes mainly rely on curved forming blocks to shape the glass. Chinese patent document CN109369021A discloses glass production equipment and glass preparation methods, including a melting device, a rolling device, a cutting device, a forming device, and a crystallization device. The melting device melts the glass raw material to form a molten glass mass and directs it to the rolling device. The rolling device rolls the molten glass mass into a glass strip at a preset temperature. The cutting device cuts the glass strip into multiple glass parts. The forming device includes at least one forming mold and a robotic arm. It mainly uses at least one forming mold to form curved surfaces on the glass parts at the preset temperature. During this process, the direct and intense friction between the glass surface and the solid mold easily forms microscopic scratches on the glass surface that are difficult to eliminate, directly affecting its smoothness and optical uniformity. At a deeper level, this high friction induces uneven stress distribution inside the glass, which not only leads to defects such as warping and microcracks, significantly reducing the product qualification rate, but also accelerates the wear of the forming mechanism itself due to the huge forming resistance, becoming a key bottleneck restricting production efficiency and the overall service life of the equipment.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by this invention is to solve the friction problem caused by relying on curved surface forming blocks to form grooved glass.

[0006] The present invention solves the above-mentioned technical problems through the following technical means: This invention claims protection for a full-roll forming mechanism, including a frame, a conveyor roller assembly, a fixed shaft, a pressure roller, a clamping roller assembly, and a forming roller assembly; a fixed shaft is provided above the conveyor roller assembly, a pressure roller is transferred on the fixed shaft, a pre-reserved distance is provided between the pressure roller and the conveyor roller assembly, clamping roller assemblies are provided on both sides of the pressure roller, the clamping roller assembly includes at least two clamping roller bodies that can rotate relative to each other, and a pre-reserved distance is provided between the clamping roller bodies, and a forming roller assembly is provided correspondingly on the front side of the clamping roller assembly along the conveying direction of the conveyor roller assembly, the forming roller assembly has a plurality of rolling surfaces that smoothly transition from the conveyor roller assembly to the clamping roller assembly.

[0007] This invention firstly divides the processing of the integral channel glass into two steps—"pre-forming" and "rolling extrusion forming"—by setting up a conveyor roller assembly, a forming roller assembly, a pressure roller, and a clamping roller assembly. This ensures a smooth transition throughout the process, allowing the molten glass to be shaped continuously and uniformly, effectively eliminating internal stress concentration caused by abrupt shape changes. This results in channel glass products with a denser structure and higher strength. Secondly, through the fundamental shift from sliding to rolling, surface scratches and stress concentration caused by sliding friction are completely eliminated, resulting in finished channel glass with excellent optical uniformity, higher mechanical strength, and smoother inner and outer surfaces, leading to a significant improvement in product quality. Furthermore, rolling contact minimizes resistance and adhesion, completely solving production interruptions caused by excessive friction, such as glass breakage and forming jams. This ensures continuous, stable, and efficient operation of the production line, directly improving production capacity and delivery capabilities.

[0008] Preferably, the forming roller assembly includes at least three forming rollers, which are located at a distance from the pressure roller from far to near. The angle between the forming rollers and the conveying roller assembly gradually increases, and the surfaces of the at least three forming rollers form a rolling surface.

[0009] The forming rollers are not limited to four; for example, there are... n When distributing the forming rollers, it is only necessary to ensure that... n The angles between the forming roller and the conveyor roller assembly can be iterated and accumulated sequentially and uniformly. For example, if the angle between the first forming roller and the conveyor roller assembly is 0°, and the angle between the second forming roller and the conveyor roller assembly is 90°, then... n -1), and so on, the difference in angle between each forming roller and the previous forming roller and conveyor roller assembly is 90° / ( n -1), until the angle between the last forming roller and the conveying roller assembly is 90°. In fact, the more forming rollers there are, the denser they are arranged, and the more uniform the transition of each forming roller, the better the guiding effect and the preliminary pre-forming effect of glass forming. Therefore, the overall plan can be determined by taking into account cost.

[0010] Preferably, each forming roller includes a shaft core, a fourth bearing, and a bushing. The shaft core is mounted on the frame, and the bushing is installed outside the shaft core through the fourth bearing.

[0011] The fourth bearing allows the bushing and the shaft to rotate relative to each other, thus creating a rolling surface.

[0012] Preferably, the axis of the forming roller furthest from the pressure roller is horizontal, flush with the surface of the conveyor roller assembly, and their positions do not interfere with each other.

[0013] The fact that the surface of the forming roller, which is furthest from the pressure roller, is flush with the surface of the conveying roller assembly ensures that the molten glass can be guided by the forming roller assembly without obstruction.

[0014] Preferably, the clamping roller assembly includes at least two clamping roller bodies, at least two clamping roller bodies are connected to a fixed axis, the axis of the clamping roller body is vertical, and the positions of the clamping roller body and the pressure roller do not interfere with each other.

[0015] The clamping rollers rotate relative to each other, pressing and shaping the preform on both sides.

[0016] Preferably, the pressure roller has open ends, the clamping roller body near the pressure roller is located inside the open ends, and the length of the clamping roller body is less than the radius of the open ends.

[0017] To avoid interference between the pressure roller and the clamping roller body, the forming of the channel glass is guaranteed.

[0018] Preferably, the clamping roller body closest to the pressure roller is defined as the first clamping roller body, and the first clamping roller body is connected to the fixed shaft via a second bearing.

[0019] The second bearing causes the first clamping rod body to rotate relative to a fixed axis.

[0020] The present invention also claims protection for a trough glass forming apparatus employing a full-roll forming mechanism, comprising a full-roll forming mechanism and a first adjusting assembly configured to adjust the distance between the pressure roller and the conveying roller assembly.

[0021] The gap between the pressure roller and the conveyor roller assembly can be adjusted by setting the first adjustment component. This means that the working gap between the pressure roller and the conveyor roller assembly can be precisely changed by operating the first adjustment component. This gap directly determines the forming thickness of the bottom of the grooved glass, making it possible to produce products of different specifications on the same equipment and greatly improving the process flexibility of the equipment.

[0022] Preferably, the first adjustment component includes a first mounting bracket and a first lead screw. The first mounting bracket is provided on both sides of the frame. The two ends of the fixed shaft are slidably fitted in the first mounting bracket. The first mounting bracket is used to install the first lead screw. The axis of the first lead screw is vertical, and the bottom end of the first lead screw is rotatably fitted with the two ends of the fixed shaft.

[0023] A high-precision lead screw was selected as the adjustment mechanism. The lead screw drive has the characteristics of good self-locking and high transmission efficiency. It can realize rapid and labor-saving stepless adjustment, and effectively avoid gap changes that may be caused by vibration during the production process. Thus, it achieves the best balance between convenience and reliability, and ultimately ensures the accuracy and stability of the thickness parameters of each batch of products.

[0024] Preferably, the grooved glass forming equipment further includes a first adjusting component, and the second adjusting component includes a second mounting bracket, a second lead screw, a collar, and a third bearing; the clamping roller body away from the pressure roller is defined as the second clamping roller body, a second through hole is passed through the fixed shaft, the second clamping roller body is slidably fitted in the second through hole, the fixed shaft is provided with a second mounting bracket, the second mounting bracket is provided with a second lead screw, the end of the second lead screw is rotatably fitted with the collar, and the collar is fitted with the top end of the second clamping roller body through the third bearing.

[0025] The advantages of this invention are as follows: Firstly, the extremely high molding yield significantly reduces scrap and rework. Secondly, the wear of the rollers is much slower than that of traditional molding blocks, significantly reducing maintenance costs and downtime, while extending equipment lifespan. This results in considerable life-cycle economic benefits, ultimately achieving a leap from friction and wear to flexible molding, and ultimately efficiently producing high-quality channel glass. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the grooved glass forming equipment in an embodiment of the present invention; Figure 2 This is a schematic diagram of the fixed axis structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the fixed axis, the first adjusting component, and the second adjusting component in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the grooved glass forming equipment and the glass in an embodiment of the present invention. 1. Conveyor roller assembly; 2. Fixed shaft; 20. First through hole; 21. Second through hole; 22. Limiting block; 23. T-slot; 3. Pressure roller; 4. First adjusting component; 40. First mounting bracket; 41. First lead screw; 50. First clamping rod body; 51. Second clamping rod body; 60. Second mounting bracket; 61. Second lead screw; 62. Collar; 7. Forming roller assembly; 70. First forming roller; 71. Second forming roller; 72. Third forming roller; 73. Fourth forming roller; 7 a 7 shaft cores; b , bushing. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0027] See Figure 1 and Figure 2 This embodiment requires protection of a grooved glass forming equipment, including a frame (not shown in the figure), a conveying roller assembly 1, a fixed shaft 2, a first bearing (not shown in the figure), a pressure roller 3, a first adjusting assembly 4, a clamping roller assembly, a second adjusting assembly, and a forming roller assembly 7.

[0028] The frame serves as the foundation of the entire mechanism. Conveyor roller assembly 1 is mounted on the frame. Conveyor roller assembly 1 is the core component of the conveying system, primarily responsible for supporting, guiding, and transmitting power during glass transport. As this is existing technology, it will not be described in detail further. The origin is taken as the center of the top surface of conveyor roller assembly 1. o With the conveying direction of conveyor roller assembly 1 as x The axis is defined by the width direction of the conveyor roller assembly 1. y The axis is defined by the height direction of the conveyor roller assembly 1. z Establish a three-dimensional coordinate system using axes.

[0029] A fixed shaft 2 is installed above the conveyor roller assembly 1. The fixed shaft 2 has a three-section stepped shaft structure, and the cross-sectional dimension of the middle section of the fixed shaft 2 is larger than the cross-sectional dimensions of the two ends of the fixed shaft 2. The shaft length of the fixed shaft 2 is... y The shafts are parallel, and a limiting block 22 is provided in the middle section of the fixed shaft 2. The limiting block 22 is used to install bearings. The fixed shaft 2 is installed and fitted with the middle part of the pressure roller 3 through the bearings. The two ends of the pressure roller 3 are open, and the pressure roller 3 and the conveyor roller assembly 1 are connected along the axis. z An axial clearance is provided to accommodate the glass. The fixed shaft 2 is mounted on the frame at both ends via the first adjusting assembly 4.

[0030] See Figure 3 The first adjusting component 4 is used to adjust the gap size. Specifically, the first adjusting component 4 includes a first mounting bracket 40 and a first lead screw 41. There are two first mounting brackets 40, which are placed on both sides of the frame. The longitudinal section of the first mounting bracket 40 is U-shaped. The two ends of the fixed shaft 2 are respectively placed in the first mounting bracket 40. The first mounting bracket 40 is equipped with the first lead screw 41. The axis of the first lead screw 41 is vertical, and the bottom end of the first lead screw 41 is adapted to fit with the T-slots 23 opened at both ends of the fixed shaft 2. When the first adjusting component 4 is running, the first lead screw 41 is activated. Due to the sliding guide action between the two ends of the fixed shaft 2 and the first mounting bracket 40, the two ends of the fixed shaft 2 are adjusted along the gap inside the first mounting bracket 40. zAn axial sliding fit is used to adjust the gap between the pressure roller 3 and the conveyor roller assembly 1. The clamping roller assemblies are symmetrically arranged on the middle section of the fixed shaft 2. Each clamping roller assembly includes a first clamping roller body 50, a second bearing (not shown in the figure), and a second clamping roller body 51. A first through hole 20 passes through the fixed shaft 2. The middle section of the first clamping roller body 50 is installed in the first through hole 20 through the second bearing. The first clamping roller body 50 is located inside the pressure roller 3, and the length of the first clamping roller body 50 is less than the opening radius to avoid positional interference between the first clamping roller body 50 and the pressure roller 3. The first clamping roller body 50 and the second clamping roller body 51 have the same structure and style. The first clamping roller body 50 has a three-section stepped shaft structure, and the diameter of the middle section of the first clamping roller body 50 is smaller than the diameter of the two ends of the first clamping roller body 50. The second clamping roller body 51 is connected by the second adjusting assembly along... y The shaft position is finely adjusted. Specifically, the second adjustment assembly includes a second mounting bracket 60, a second lead screw 61, a collar 62, and a third bearing (not shown in the figure). A second through hole 21 passes through the fixed shaft 2. The second through hole 21 is an oblong hole that mates with the middle section of the second clamping roller body 51. The second clamping roller body 51 is located outside the pressure roller 3. A second mounting bracket 60 is provided on the fixed shaft 2 on one side of the second clamping roller body 51. The second mounting bracket 60 is inverted. U The second mounting bracket 60 has a second lead screw 61, the end of which is rotatably engaged with a collar 62. The collar 62 is engaged with the top end of the second clamping rod body 51 via a third bearing. When the second adjustment assembly is in operation, the second lead screw 61 is activated, causing the second clamping rod body 51 inside the collar 62 to move along the oblong hole, thereby fine-tuning the position of the second clamping rod body 51, the distance between the second clamping rod body 51 and the first clamping rod body 50, and their parallelism.

[0031] In fact, the second adjustment component is not limited to adjusting the second clamping rod body 51. It can also adjust only the first clamping rod body 50, or both the second clamping rod body 51 and the first clamping rod body 50 can be adjusted using the second adjustment component. It is necessary to ensure that the adjustment will not interfere with other components or with each other.

[0032] Along the conveying direction of the conveyor roller assembly 1, a set of forming roller assemblies 7 are correspondingly arranged on the frame in front of the clamping roller assembly. The set of forming roller assemblies 7 is symmetrically arranged along the pressure roller 3. The set of forming roller assemblies 7 is used to guide and pre-form the two sides of the glass, so that the two sides of the molten glass can be initially formed inward to form a groove. The forming roller assembly 7 includes four forming rollers, each of which is made of the same material and includes a shaft core 7. a , fourth bearing (not shown in the figure) and bushing 7 b 7 connecting shafts on the frame a Shaft core 7 a Install bushing 7 via bearing bEach forming roller forms a different angle with the conveyor roller assembly 1. They are defined sequentially from farthest from the pressure roller 3 as the first forming roller 70, the second forming roller 71, the third forming roller 72, and the fourth forming roller 73. The first forming roller 70 has a horizontal axis, is flush with the surface of the conveyor roller assembly 1, and its position does not interfere with each other. The second forming roller 71 is inclined, forming an angle of 30° with the conveyor roller assembly 1. The fourth forming roller 73 has a vertical axis. X The axial direction is vertically set, and its position corresponds to the body of the second clamping roller. The forming rollers are arranged in sequence, forming a smooth arc that gradually tapers inward, as the molten glass meets the bushing 7. b With the rolling cooperation, a smooth and stable transition in the preforming process is achieved. Subsequently, the preform is fed into the clamping roller assembly by the conveying roller assembly 1, and the clamping rollers roll and squeeze the two sides of the groove. At the same time, the conveying roller and the pressure roller 3 work together to squeeze and shape the bottom of the groove, finally forming a complete grooved glass.

[0033] It is worth mentioning that the forming rollers are not limited to four; for example, there are... n When distributing the forming rollers, it is only necessary to ensure that... n The angles between the forming roller and the conveying roller assembly 1 can be iterated and accumulated uniformly in sequence. For example, if the angle between the first forming roller and the conveying roller assembly 1 is 0°, and the angle between the second forming roller and the conveying roller assembly 1 is 90°, then... n -1), and so on, the difference in angle between each forming roller and the previous forming roller and the conveying roller assembly 1 is 90° / ( n -1), until the angle between the last forming roller and the conveying roller assembly 1 is 90°. In fact, the more forming rollers there are, the denser they are arranged, and the more uniform the transition of each forming roller, the better the guiding effect and the preliminary pre-forming effect of glass forming. Therefore, the overall plan can be determined in combination with cost.

[0034] See Figure 4 The process of using this forming equipment to produce channel glass is as follows: First, adjust the first and second adjusting components according to the required glass groove shape to be produced. This has been described in detail above and will not be repeated here.

[0035] Secondly, during operation, the pressure roller 3, forming roller and clamping roller assembly are not powered by themselves. Instead, the conveyor roller assembly 1 drives the molten glass to move. It first passes through the forming roller, and is guided by the first forming roller 70, the second forming roller 71, the third forming roller 72 and the fourth forming roller 73 in sequence, so that the two sides are initially formed into a groove shape. Then, the conveyor roller assembly 1 sends it between the clamping roller assembly, and the clamping roller rolls and squeezes the two sides of the groove shape. At the same time, the conveyor roller and the pressure roller 3 work together to squeeze and form the bottom of the groove shape, and finally form a complete groove glass.

[0036] Throughout the process, the existing technology of using curved forming blocks to compress, slide, friction, and plasticize molten glass is abandoned. Instead, the molten glass is driven to move by the conveying roller assembly 1, and the forming roller assembly 7 rolls with the molten glass to guide and pull it for preliminary preforming. The clamping roller assembly rolls with both sides of the preform, while the pressure roller 3 rolls with the conveying roller assembly 1 to the bottom of the preform, ultimately forming a grooved glass.

[0037] First, by dividing the overall channel glass processing into two steps, "pre-forming" and "rolling extrusion forming", the entire process is smoothly transitioned, and the deformation of the molten glass is completed continuously and uniformly. This effectively eliminates the internal stress concentration caused by abrupt changes in shape, thereby producing channel glass products with a denser structure and higher strength.

[0038] Secondly, the fundamental shift from sliding to rolling not only eliminates surface scratches and stress concentration caused by sliding friction, resulting in superior optical uniformity, higher mechanical strength, and smoother inner and outer surfaces in the finished channel glass, leading to a significant improvement in product quality, but also minimizes resistance and adhesion through rolling contact. This completely solves production interruptions caused by excessive friction, such as glass breakage and forming jams, ensuring continuous, stable, and efficient operation of the production line and directly increasing capacity and delivery capabilities. Therefore, from the source, on the one hand, the extremely high yield rate significantly reduces scrap and rework; on the other hand, the wear of the rollers is much slower than that of traditional forming blocks, significantly reducing maintenance costs and downtime, while extending equipment lifespan, resulting in considerable life-cycle economic benefits. Ultimately, this achieves a leap from friction and wear to flexible forming, resulting in the efficient production of high-quality channel glass.

[0039] Furthermore, the gap between the pressure roller 3 and the conveying roller assembly 1 can be adjusted by setting the first adjusting component 4. This means that the working gap between the pressure roller 3 and the conveying roller assembly 1 can be precisely changed by operating the first adjusting component 4. This gap directly determines the forming thickness of the bottom of the grooved glass, making it possible to produce products of different specifications on the same equipment, greatly improving the process flexibility of the equipment. Moreover, a high-precision first lead screw 41 is selected as the adjusting mechanism. The lead screw drive has the characteristics of good self-locking and high transmission efficiency, enabling rapid and labor-saving stepless adjustment while effectively avoiding gap changes that may be caused by vibration during production. This achieves the best balance between convenience and reliability, ultimately ensuring the accuracy and stability of the thickness parameters of each batch of products.

[0040] Furthermore, through the fine adjustment of the second adjustment component, the position of the second clamping roller body 51, the distance between the second clamping roller body 51 and the first clamping roller body 50, and the parallelism can be quickly adjusted, thereby improving the controllability of the forming of both sides of the grooved glass.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A full roll forming mechanism, characterized by, The utility model relates to a full roller type forming mechanism and a first adjusting assembly (4), and the first adjusting assembly (4) is configured to adjust the distance between the compression roller (3) and the conveying roller assembly (1).

2. The full roll forming mechanism according to claim 1, characterized in that, The forming roller assembly (7) includes at least three forming rollers, and the angle between the forming rollers and the conveying roller assembly (1) gradually increases from far to near the compression roller (3). The surfaces of the at least three forming rollers constitute a rolling surface.

3. The full roll forming mechanism according to claim 2, wherein The forming roller comprises a shaft core (7 a ), a fourth bearing and a shaft sleeve (7 b ), the shaft core (7 a ) is arranged on the frame, and the shaft sleeve (7 a ) is installed outside the shaft core (7 b ) through the fourth bearing.

4. The full roll forming mechanism of claim 2, wherein, The axis of the forming roller farthest from the compression roller (3) is horizontal, flush with the surface of the conveying roller assembly (1), and does not interfere with each other.

5. The full roll forming mechanism of claim 1, wherein, The clamping rod assembly includes at least two clamping rod bodies, and the at least two clamping rod bodies are connected to the fixed shaft (2). The axis of the clamping rod body is vertical, and the clamping rod body and the compression roller (3) do not interfere with each other.

6. A full roll forming mechanism according to claim 5, wherein The compression roller (3) is open at both ends, the clamping rod body near the compression roller (3) is located in the opening, and the length of the clamping rod body is less than the radius of the opening.

7. The full roll forming mechanism of claim 5, wherein, The clamping rod body near the compression roller (3) is defined as a first clamping rod body (50), and the first clamping rod body (50) is connected to the fixed shaft (2) through a second bearing.

8. A slot glass forming apparatus using the full roll forming mechanism according to any one of claims 1 to 7, characterized in that, The utility model includes a full roller type forming mechanism and a first adjusting assembly (4), and the first adjusting assembly (4) is configured to adjust the distance between the compression roller (3) and the conveying roller assembly (1).

9. The full roll forming mechanism of claim 8, wherein, The first adjusting assembly (4) includes a first mounting frame (40) and a first lead screw (41). The first mounting frame (40) is arranged on both sides of the rack. The fixed shaft (2) is slidably connected to the first mounting frame (40) at both ends. The first mounting frame (40) is provided with the first lead screw (41). The axis of the first lead screw (41) is vertical, and the bottom end of the first lead screw (41) is connected to the fixed shaft (2).

10. The full roll forming mechanism of claim 8, wherein, The utility model also includes a first adjusting assembly (4), and a second adjusting assembly includes a second mounting frame (60), a second lead screw (61), a sleeve ring (62), and a third bearing. The clamping rod body farthest from the compression roller (3) is defined as a second clamping rod body (51). The fixed shaft (2) penetrates the second through hole (21). The second clamping rod body (51) is slidably connected to the second through hole (21). The fixed shaft (2) is provided with the second mounting frame (60). The second mounting frame (60) is provided with the second lead screw (61). The end of the second lead screw (61) is connected to the sleeve ring (62). The sleeve ring (62) is connected to the top end of the second clamping rod body (51) through the third bearing.

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