A wire and cable slitting machine with simultaneous stripping of inner and outer insulation

Abstract

This utility model relates to the field of wire and cable shaving technology. It provides a wire and cable shaving machine that simultaneously strips the inner and outer insulation layers. The machine includes a body, with supporting feet fixedly connected to the bottom. A discharge plate is fixedly connected to the side of the body, and a door panel is slidably connected to the side of the body. A handle is fixedly connected to the side of the door panel. A shaving mechanism is installed inside the body. This utility model also includes a shaving mechanism and a feeding mechanism. Through the cooperation of the internal components of the shaving mechanism, rotating shafts two and three rotate synchronously, causing the two sets of blades to run at the same speed. This allows for the simultaneous stripping of the inner and outer insulation layers of the wire and cable, improving shaving efficiency. The precise coordination of each component enables continuous operation and reduces manual intervention. This technical solution solves the technical problem of poor wire and cable shaving effect in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable chipping technology, specifically to a wire and cable chipping machine that can simultaneously peel off the inner and outer insulation layers. Background Technology

[0002] This wire and cable shaving machine is specifically designed for the efficient processing of double-insulated wires, enabling simultaneous stripping of both inner and outer insulation layers. The equipment employs a dual-blade collaborative operation structure, with precise adjustment of the blade spacing and angle to accommodate cables of different diameters. During operation, the cable is precisely fed in via a guide mechanism. The outer blade circumferentially cuts the outer insulation layer, while the inner blade simultaneously strips the inner insulation layer. The stripped wire core and insulation are automatically separated and collected. It features simple operation, high stripping efficiency, and clean cuts, making it suitable for recycling waste cables and processing new cables in the power and telecommunications industries, effectively improving the automation and efficiency of cable processing.

[0003] According to a public disclosure (Publication No.: CN222749281U), a wire and cable shaving machine includes: a base plate, a machine body, a protective cover, a motor, a cutting shaft, a first gear, and cylinders. The machine body is connected to the base plate, and the protective cover is connected to the rear side of the machine body. The motor is connected to the right side of the protective cover, and two cutting shafts are rotatably connected inside the protective cover. The upper cutting shaft is connected to the output shaft of the motor, and the right side of each cutting shaft is connected to a first gear. The two first gears mesh with each other. Several cylinders are connected to the protective cover. The rotating cutting shaft performs coarse cutting, while the rotating cam pushes the wire and cable forward, and the rotating dividing shaft performs fine cutting, thus achieving the purpose of peeling off the inner and outer insulation layers.

[0004] In the aforementioned application, the cooperation between the cutting shaft and components such as the cylinder makes it difficult to simultaneously strip the insulation of the wires and cables when they are being transported in the machine body, resulting in poor wire and cable stripping effect. Therefore, we propose a wire and cable stripping machine that simultaneously strips the inner and outer insulation layers. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a wire and cable shaving machine that can simultaneously strip the inner and outer insulation layers, thus solving the technical problem of poor wire and cable shaving effect in related technologies.

[0006] According to one aspect, at least one embodiment of the present invention provides a wire and cable chipper for simultaneously stripping inner and outer insulation layers, comprising: a machine body, a support foot pad fixedly connected to the bottom of the machine body, a discharge plate fixedly connected to the side of the machine body, a door panel slidably connected to the side of the machine body, a handle fixedly connected to the side of the door panel, and a chipping mechanism provided inside the machine body. The peeling mechanism includes a motor, the side of which is fixedly connected to the side of the machine body. A rotating shaft is fixedly connected to the end of the motor output shaft. A bevel gear is fixedly connected to the end of the rotating shaft away from the motor. A clamp is fixedly connected to the inner side of the machine body. A rotating shaft is rotatably connected to the inner side of the machine body. The rotating shaft passes through the inner side of the clamp. A bevel gear is fixedly connected to the circumferential surface of the rotating shaft. The bevel gear and the bevel gear mesh with each other. A rotating shaft is rotatably connected to the inner side of the clamp. Blades are fixedly connected to the circumferential surfaces of both the rotating shaft and the rotating shaft. A pulley is fixedly connected to one end of the rotating shaft. A pulley is fixedly connected to one end of the rotating shaft. A belt is provided on the circumferential surface of the pulley. The pulley is connected to the pulley via the belt.

[0007] For example, in at least one embodiment of this utility model, a wire and cable chipper that simultaneously strips both inner and outer insulation layers includes: a plurality of supporting feet symmetrically arranged along the vertical central axis of the machine body to evenly distribute the weight of the machine body, enhance equipment stability, and prevent displacement due to vibration during operation; and a sliding groove provided on the side of the machine body. The sliding groove on the side of the machine body cooperates with the door panel slider to guide the door panel to slide smoothly, facilitating operation and maintenance of internal components and ensuring operational safety.

[0008] A slider is fixedly connected to the side of the door panel. The width of the slider is equal to the width of the groove, which ensures that the door panel slides accurately and smoothly along the groove, avoids deviation or jamming, and ensures smooth opening and closing of the door panel.

[0009] The blade has grooves on its side, and there are several grooves arranged in a circumferential array on the side of the blade to enhance the cutting and peeling effect on the insulation of wires and cables, improve the peeling efficiency, and enhance the stability and reliability of the overall peeling mechanism.

[0010] The diameter of pulley one is equal to the diameter of pulley two, and the number of teeth of bevel gear one is equal to the number of teeth of bevel gear two, ensuring that the two sets of blades run at the same speed, realizing the synchronous peeling of the inner and outer insulation layers of the cable, avoiding uneven peeling due to differences in rotation speed, improving the synchronization and stability of the overall mechanism operation, and ensuring precise and efficient peeling operation.

[0011] According to another aspect, at least one embodiment of the present invention also provides a wire and cable chipping machine for simultaneously stripping inner and outer insulation layers, comprising: a feeding mechanism disposed inside the machine body, the feeding mechanism including a bracket, the bottom of the bracket being fixedly connected to the inner side of the machine body, rollers being rotatably connected to the side of the bracket, a vertical plate being fixedly connected to the inner side of the machine body, a first roller being rotatably connected to the side of the vertical plate, a first roller being fixedly connected to the circumferential surface of the first roller, a second roller being rotatably connected to the side of the vertical plate, a second roller being fixedly connected to the circumferential surface of the second roller, a first gear being fixedly connected to one end of the first roller, a second gear being fixedly connected to the circumferential surface of the second roller, the first gear and the second gear meshing with each other, a first sprocket being fixedly connected to one end of the second roller, a second sprocket being fixedly connected to the circumferential surface of the first roller, a chain being disposed on the circumferential surface of the first sprocket, and the first sprocket being drivenly connected to the second sprocket through the chain.

[0012] For example, in at least one embodiment of the present invention, a wire and cable chipper that simultaneously strips the inner and outer insulation layers further includes: two brackets and uprights, which are symmetrically arranged along the vertical central axis of the machine body to ensure that they remain in a centered position during conveying and chipping, avoiding deviation that could lead to cutting errors; and several rollers arranged in a linear array on the inner side of the machine body to reduce friction during conveying, allowing the cable to pass smoothly through the working area and preventing jamming or wear.

[0013] The sides of gear one and gear two are provided with spokes. The number of spokes is set to several and arranged in a circumferential array on the sides of gear one and gear two. While ensuring the overall strength of the gears, the weight of the gears is greatly reduced, energy loss is reduced, the gears rotate more easily and flexibly, and the operating efficiency of the mechanism is improved.

[0014] The number of teeth of gear one is equal to the number of teeth of gear two, and the diameter of roller one is equal to the diameter of roller two, so as to achieve constant speed and reverse rotation, ensuring that the cable remains stable during clamping or conveying and preventing deviation.

[0015] The circumferential surfaces of roller one and roller two are provided with grooves. The diameter of the groove on the circumferential surface of roller one is equal to the diameter of the groove on the circumferential surface of roller two, ensuring that the cable is stably clamped in the center of the channel and avoiding slippage due to loose clamping.

[0016] The beneficial effects of the embodiments of this utility model are as follows: In this invention, the rotating shaft, blades, and belts within the peeling mechanism work together to achieve synchronous rotation of rotating shaft two and rotating shaft three, allowing the two sets of blades to run at the same speed. This enables the simultaneous peeling of the inner and outer insulation layers of wires and cables, improving peeling efficiency. The circumferential array of grooves on the side of the blades enhances the cutting effect, ensuring thorough peeling. The overall transmission structure is stable, and the components work precisely together, allowing for continuous operation, reducing manual intervention, increasing processing speed, and providing strong adaptability. It can efficiently complete insulation peeling, facilitating subsequent processing.

[0017] In this invention, the rollers, wheels, and gears inside the feeding mechanism work together to make roller one and roller two rotate synchronously in opposite directions. Their grooves precisely clamp the cable, achieving stable feeding. Symmetrically distributed supports and rollers provide auxiliary support, ensuring smooth cable transport. The coordinated operation of all components synchronizes feeding and peeling, preventing jamming and improving continuity. The gears, sprockets, and other transmissions are precise, adaptable to different cable specifications, reducing manual operation, improving overall work efficiency, and ensuring a smooth and efficient peeling process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present invention; Figure 2 This is a cross-sectional three-dimensional appearance structure diagram of one embodiment of the present invention; Figure 3 This is a three-dimensional external structural diagram of the feeding and peeling mechanism in one embodiment of the present invention; Figure 4 This is a three-dimensional external structural diagram of the peeling mechanism in one embodiment of the present invention; Figure 5 This is a three-dimensional appearance structural diagram of the feeding mechanism in one embodiment of the present invention.

[0020] In the diagram: 1. Machine body; 2. Support feet; 3. Discharge plate; 4. Door panel; 5. Handle; 6. Peeling mechanism; 61. Motor; 62. Shaft 1; 63. Bevel gear 1; 64. Clamp; 65. Shaft 2; 66. Shaft 3; 67. Blade; 68. Pulley 1; 69. Pulley 2; 610. Belt; 611. Bevel gear 2; 7. Feeding mechanism; 71. Bracket; 72. Roller; 73. Vertical plate; 74. Roller 1; 75. Roller 1; 76. Roller 2; 77. Roller 2; 78. Gear 1; 79. Gear 2; 710. Sprocket 1; 711. Sprocket 2; 712. Chain. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0022] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0023] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] like Figures 1-5 As shown, it illustrates a wire and cable chipper that simultaneously strips the inner and outer insulation layers in one embodiment of the present invention, comprising: a machine body 1, a support foot pad 2 fixedly connected to the bottom of the machine body 1, a discharge plate 3 fixedly connected to the side of the machine body 1, a door panel 4 slidably connected to the side of the machine body 1, a handle 5 fixedly connected to the side of the door panel 4, and a chipping mechanism 6 provided inside the machine body 1. The peeling mechanism 6 includes a motor 61, which is fixedly connected to the side of the machine body 1. A rotating shaft 62 is fixedly connected to the end of the output shaft of the motor 61. A bevel gear 63 is fixedly connected to the end of the rotating shaft 62 away from the motor 61. A clamp 64 is fixedly connected to the inner side of the machine body 1. A rotating shaft 65 is rotatably connected to the inner side of the machine body 1. The rotating shaft 65 rotatably passes through the inner side of the clamp 64. A bevel gear 611 is fixedly connected to the circumferential surface of the rotating shaft 65. The bevel gear 63 and the bevel gear 611 mesh with each other. A rotating shaft 66 is rotatably connected to the inner side of the clamp 64. Blades 67 are fixedly connected to the circumferential surfaces of both the rotating shaft 65 and the rotating shaft 66. A pulley 68 is fixedly connected to one end of the rotating shaft 65. A pulley 69 is fixedly connected to one end of the rotating shaft 66. A belt 610 is provided on the circumferential surface of the pulley 68. The pulley 68 is connected to the pulley 69 via the belt 610.

[0028] In some examples, the number of support feet 2 is set to several and symmetrically arranged along the vertical central axis of the machine body 1, which can evenly distribute the weight of the machine body 1, enhance the stability of the equipment, and prevent displacement due to vibration during operation. The sides of the machine body 1 are provided with sliding grooves. The sliding grooves on the sides of the machine body 1 cooperate with the sliders of the door panel 4 to guide the door panel 4 to slide smoothly, which facilitates the operation and maintenance of internal components and ensures operational safety.

[0029] A slider is fixedly connected to the side of the door panel 4. The width of the slider is equal to the width of the groove, which ensures that the door panel 4 slides accurately and smoothly along the groove, avoids deviation or jamming, and ensures that the door panel 4 opens and closes smoothly.

[0030] The blade 67 has grooves on its side, and the number of grooves is arranged in a circular array on the side of the blade 67 to enhance the cutting and peeling effect on the insulation of wires and cables, improve the peeling efficiency, and enhance the stability and reliability of the overall peeling mechanism 6.

[0031] The diameter of pulley 68 is equal to the diameter of pulley 69, and the number of teeth of bevel gear 63 is equal to the number of teeth of bevel gear 611. This ensures that the two sets of blades 67 operate at the same speed, achieving synchronous stripping of the inner and outer insulation layers of the cable. This avoids uneven stripping due to differences in rotational speed, improves the synchronicity and stability of the overall mechanism, and ensures precise and efficient stripping operations.

[0032] For example, such as Figures 1-5 As shown, the operator starts the motor 61, whose output shaft drives the rotating shaft 62 to rotate. The rotating shaft 62 transmits power to the rotating shaft 65 through the meshing of the bevel gear 63 and the bevel gear 611, causing the rotating shaft 65 to rotate. When the rotating shaft 65 rotates, the pulley 68 at one end drives the pulley 69 to rotate through the belt 610, thereby causing the rotating shaft 66 to rotate synchronously with the rotating shaft 65. Since the diameters of the pulleys 68 and 69 are equal, and the number of teeth of the bevel gears 63 and 611 is the same, the rotating shafts 65 and 66 rotate at the same speed, ensuring that the two sets of blades 67 rotate at the same speed. After the wires and cables enter, the two sets of blades 67 act synchronously, using the circumferential array grooves on the side to enhance the cutting effect, quickly and evenly peeling off the inner and outer insulation layers simultaneously, achieving efficient peeling operation.

[0033] like Figures 1-5 The image shows a wire and cable chipper that simultaneously strips the inner and outer insulation layers according to another embodiment of the present invention. The chipper includes: a feeding mechanism 7 inside the machine body 1, the feeding mechanism 7 including a bracket 71, the bottom of the bracket 71 fixedly connected to the inner side of the machine body 1, rollers 72 rotatably connected to the side of the bracket 71, a vertical plate 73 fixedly connected to the inner side of the machine body 1, a roller 74 rotatably connected to the side of the vertical plate 73, a roller 75 fixedly connected to the circumferential surface of the roller 74, and a roller 75 on the side of the vertical plate 73. A second roller 76 is rotatably connected, and a second roller 77 is fixedly connected to the circumferential surface of the second roller 76. A first gear 78 is fixedly connected to one end of the first roller 74, and a second gear 79 is fixedly connected to the circumferential surface of the second roller 76. The first gear 78 and the second gear 79 mesh with each other. A first sprocket 710 is fixedly connected to one end of the second roller 76, and a second sprocket 711 is fixedly connected to the circumferential surface of the first rotating shaft 62. A chain 712 is provided on the circumferential surface of the first sprocket 710, and the first sprocket 710 is connected to the second sprocket 711 through the chain 712. In some examples, there are two brackets 71 and two uprights 73, which are symmetrical about each other along the vertical central axis of the machine body 1 to ensure that they remain in the center during conveying and peeling, and avoid offset that causes cutting deviation. There are several rollers 72, which are arranged in a linear array on the inner side of the machine body 1 to reduce friction during conveying, so that the cable can pass smoothly through the working area and prevent jamming or wear.

[0034] Spokes are provided on the sides of gear 1 78 and gear 2 79. The number of spokes is set to a certain number and is arranged in a circumferential array on the sides of gear 1 78 and gear 2 79. While ensuring the overall strength of the gears, the weight of the gears is greatly reduced, energy loss is reduced, the gears rotate more easily and flexibly, and the operating efficiency of the mechanism is improved.

[0035] The number of teeth on gear 1 (78) is equal to the number of teeth on gear 2 (79), and the diameter of roller 1 (75) is equal to the diameter of roller 2 (77), achieving constant speed and reverse rotation to ensure that the cable remains stable during clamping or conveying and to prevent deviation.

[0036] The circumferential surfaces of roller 1 75 and roller 2 77 are provided with grooves. The diameter of the groove on the circumferential surface of roller 1 75 is equal to the diameter of the groove on the circumferential surface of roller 2 77, ensuring that the cable is stably clamped in the center of the channel and avoiding slippage due to loose clamping.

[0037] For example, such as Figures 1-5 As shown, motor 61 drives shaft 62 to rotate. Shaft 62 drives sprocket 710 via sprocket 711 and chain 712, causing roller 76 to rotate. Gear 79 on roller 76 meshes with gear 78 on roller 74, causing roller 74 to rotate synchronously in the opposite direction. This, in turn, causes roller 75 and roller 77 to rotate in the opposite direction at the same speed. The wires and cables are supported by rollers 72 on bracket 71 and enter between the two rollers. The grooves on their circumferential surfaces precisely hold the cables, which are then smoothly conveyed forward as the rollers rotate, achieving synchronous operation with the peeling mechanism 6 and ensuring continuous feeding.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A wire and cable slitting machine for simultaneously stripping the inner and outer insulation layers, characterized in that, include: The machine body (1) has a support foot pad (2) fixedly connected to the bottom of the machine body (1), a discharge plate (3) fixedly connected to the side of the machine body (1), a door panel (4) slidably connected to the side of the machine body (1), a handle (5) fixedly connected to the side of the door panel (4), and a peeling mechanism (6) is provided inside the machine body (1). The peeling mechanism (6) includes a motor (61), the side of which is fixedly connected to the side of the machine body (1). A rotating shaft (62) is fixedly connected to the end of the output shaft of the motor (61). A bevel gear (63) is fixedly connected to the end of the rotating shaft (62) away from the motor (61). A clamp (64) is fixedly connected to the inner side of the machine body (1). A rotating shaft (65) is rotatably connected to the inner side of the machine body (1). The rotating shaft (65) rotatably passes through the inner side of the clamp (64). A bevel gear is fixedly connected to the circumferential surface of the rotating shaft (65). Wheel 2 (611), bevel gear 1 (63) meshes with bevel gear 2 (611), the inner side of clamp (64) is rotatably connected to shaft 3 (66), blades (67) are fixedly connected to the circumferential surfaces of shaft 2 (65) and shaft 3 (66), pulley 1 (68) is fixedly connected to one end of shaft 2 (65), pulley 2 (69) is fixedly connected to one end of shaft 3 (66), belt (610) is provided on the circumferential surface of pulley 1 (68), and pulley 1 (68) is connected to pulley 2 (69) through belt (610).

2. The machine according to claim 1, wherein The number of the support pads (2) is set to several, and they are symmetrical to each other along the vertical central axis of the body (1). The side of the body (1) is provided with a sliding groove.

3. A wire and cable shaving machine for simultaneously stripping the inner and outer insulation layers according to claim 2, characterized in that, The side of the door panel (4) is fixedly connected to a slider, the width of which is equal to the width of the groove.

4. A wire and cable chipping machine for simultaneously stripping the inner and outer insulation layers according to claim 3, characterized in that, The blade (67) has grooves on its side, and the number of grooves is set to several and arranged in a circumferential array on the side of the blade (67).

5. A wire and cable chipper for simultaneously stripping inner and outer insulation layers according to claim 4, characterized in that, The diameter of pulley one (68) is equal to the diameter of pulley two (69), and the number of teeth of bevel gear one (63) is equal to the number of teeth of bevel gear two (611).

6. A wire and cable shaving machine for simultaneously stripping inner and outer insulation layers according to claim 5, characterized in that, The machine body (1) is equipped with a feeding mechanism (7). The feeding mechanism (7) includes a bracket (71). The bottom of the bracket (71) is fixedly connected to the inner side of the machine body (1). Rollers (72) are rotatably connected to the side of the bracket (71). A vertical plate (73) is fixedly connected to the inner side of the machine body (1). A roller (74) is rotatably connected to the side of the vertical plate (73). A roller (75) is fixedly connected to the circumferential surface of the roller (74). A roller (76) is rotatably connected to the side of the vertical plate (73). The circumferential surface of the roller (76) is fixedly connected to the circumferential surface of the roller (75). A roller (76) is rotatably connected to the side of the vertical plate (73). A roller 2 (77) is fixedly connected to the surface of the roller 1 (74), a gear 1 (78) is fixedly connected to one end of the roller 1 (74), a gear 2 (79) is fixedly connected to the circumferential surface of the roller 2 (76), the gear 1 (78) and the gear 2 (79) mesh with each other, a sprocket 1 (710) is fixedly connected to one end of the roller 2 (76), a sprocket 2 (711) is fixedly connected to the circumferential surface of the rotating shaft 1 (62), a chain (712) is provided on the circumferential surface of the sprocket 1 (710), and the sprocket 1 (710) is connected to the sprocket 2 (711) through the chain (712).

7. A wire and cable shaving machine for simultaneously stripping inner and outer insulation layers according to claim 6, characterized in that, The bracket (71) and the upright plate (73) are provided in two quantities and are symmetrical to each other along the vertical central axis of the body (1). The rollers (72) are provided in several quantities and are arranged in a linear array on the inner side of the body (1).

8. A wire and cable chipping machine for simultaneously stripping the inner and outer insulation layers according to claim 7, characterized in that, The first gear (78) and the second gear (79) have spokes on their sides, and the number of spokes is set to a certain number and arranged in a circumferential array on the sides of the first gear (78) and the second gear (79).

9. A wire and cable shaving machine for simultaneously stripping inner and outer insulation layers according to claim 8, characterized in that, The number of teeth of gear one (78) is equal to the number of teeth of gear two (79), and the diameter of roller one (75) is equal to the diameter of roller two (77).

10. A wire and cable shaving machine for simultaneously stripping inner and outer insulation layers according to claim 9, characterized in that, The circumferential surfaces of roller one (75) and roller two (77) are provided with grooves, and the diameter of the groove on the circumferential surface of roller one (75) is equal to the diameter of the groove on the circumferential surface of roller two (77).

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