Corrugated board indentation forming device

Abstract

The application provides a corrugated board indentation forming device, and relates to the technical field of corrugated board indentation forming, which comprises a corrugated board cutting frame, a plurality of paper board falling holes are formed in the top of the corrugated board cutting frame, a supporting frame is fixedly installed at the rear side of the corrugated board cutting frame, a first protective cover is fixedly installed on the top inner wall of the supporting frame, a corrugated board indentation forming assembly is arranged, the working positions of a cutting saw blade and an indentation forming roller can be quickly switched by rotating the rotating plate driven by a second motor; the cutting saw blade is in contact with the paper board when cutting, and the indentation forming roller is switched to be in contact with the paper board when indentation forming, so that it is not necessary to replace equipment or transfer the paper board, and the process interval is greatly shortened; the rotating frame is rotated by a first motor through a driving shaft, so that the cutting or indentation forming part can be flexibly adjusted in angle and position to adapt to the processing requirements of different shapes; and the integrated design reduces equipment investment and operation steps.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard creasing technology, and in particular to a corrugated cardboard creasing device. Background Technology

[0002] Corrugated paper is a sheet-like material made by bonding linerboard and corrugated paper formed by corrugating rollers. Due to its light weight and high strength, corrugated paper is widely used in the production and processing of cartons. In the carton processing, corrugated boards need to undergo processes such as trimming, creasing, assembly, gluing, and stapling. Trimming refers to cutting off the excess material from the corrugated paper, while creasing involves pressing creases into the corrugated paper to facilitate folding during subsequent carton assembly. Currently, most creasing equipment is separate from trimming equipment; the paper needs to be trimmed first, and then transferred to the creasing equipment for creasing. When using existing creasing and forming devices, traditional equipment requires separate cutting of corrugated cardboard and transfer to creasing equipment for creasing. The cardboard needs to be manually moved between processes, which not only increases the labor intensity of operators but also prolongs the overall processing cycle. Furthermore, the cardboard is prone to secondary positioning deviation during equipment switching, which further affects the processing quality and results in low work efficiency. Therefore, we propose a corrugated cardboard creasing and forming device. Utility Model Content

[0003] In view of this, this application provides a corrugated cardboard creasing and forming device, which solves the above technical problems to a certain extent.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A corrugated cardboard creasing and forming device includes a corrugated cardboard cutting frame. The top of the corrugated cardboard cutting frame is provided with a plurality of cardboard drop holes. A support frame is fixedly installed on the rear side of the corrugated cardboard cutting frame. A first protective cover is fixedly installed on the top inner wall of the support frame. A corrugated cardboard positioning and cutting component and a corrugated cardboard creasing and forming component are provided on the first protective cover. The corrugated cardboard positioning and cutting assembly includes a first motor, a drive shaft, a rotating frame, a battery, a first electric telescopic rod, and a downward pressure limiting plate. The first motor is fixedly installed inside the first protective cover, the drive shaft is fixedly installed at the output end of the first motor, the rotating frame is fixedly installed at the output end of the drive shaft, the battery is fixedly installed at the bottom of the rotating frame, the first electric telescopic rod is fixedly installed at the bottom of the rotating frame, and the downward pressure limiting plate is fixedly installed at the output end of the first electric telescopic rod. The first electric telescopic rod and the battery are electrically connected.

[0005] Preferably, a corrugated cardboard positioning plate is fixedly installed on the top of the corrugated cardboard cutting machine frame. Both the corrugated cardboard positioning plate and the top of the corrugated cardboard cutting machine frame are provided with connecting threaded holes. The corrugated cardboard positioning plate is connected to the connecting threaded holes by fixing bolts. A positioning camera is fixedly installed on the rear inner wall of the support frame.

[0006] Preferably, the corrugated cardboard positioning and cutting assembly further includes a second electric telescopic rod, a mounting frame, a third electric telescopic rod, and a guide box. The second electric telescopic rod is fixedly installed on the inner side of the rotating frame and is electrically connected to a battery. The mounting frame is fixedly installed on the output end of the second electric telescopic rod. The third electric telescopic rod is fixedly installed on the bottom of the mounting frame and is electrically connected to a battery. The guide box is fixedly installed on the output end of the third electric telescopic rod.

[0007] Preferably, a sliding frame is slidably installed on the inner side of the guide box, a second motor is fixedly installed on one side of the sliding frame, a second protective cover is fixedly installed on the outer side of the second motor, a rotating plate is fixedly installed at the output end of the second motor, a drive motor is fixedly installed on one side of the rotating plate, and a cutting saw blade is fixedly installed at the output end of the drive motor.

[0008] Preferably, the corrugated cardboard creasing and forming assembly includes a third motor, a lead screw, an auxiliary frame, a guide roller, and a creasing forming roller. The third motor is fixedly installed on the inner wall of one side of the guide box, the lead screw is fixedly installed on the output end of the third motor, the sliding frame is threaded on the outside of the lead screw, the auxiliary frame is fixedly installed on the front and rear sides of the second protective cover, the guide roller is rotatably installed on one side of the auxiliary frame, and the creasing forming roller is rotatably installed on one side of the rotating plate.

[0009] Preferably, the corrugated cardboard creasing and forming assembly further includes a dust collection box, a dust pump, a hard suction tube, and a suction head. The dust collection box is fixedly installed on one side of the guide box, the dust pump is fixedly installed at the bottom of the dust collection box, the suction end of the dust pump is connected to the dust collection box, a protective filter is fixedly installed at the suction end of the dust pump, one end of the hard suction tube is fixedly installed at the bottom of the dust collection box, and the suction head is fixedly installed at the other end of the hard suction tube.

[0010] Preferably, a guide groove is provided on one side of the guide box, and the sliding frame is slidably installed on the inner side of the guide groove.

[0011] Preferably, the outer sides of both the guide roller and the indentation forming roller are fitted with anti-slip rubber pads.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The corrugated cardboard creasing and forming device of this utility model, through the corrugated cardboard positioning and cutting component, the positioning and shooting camera on the back of the support frame has a built-in PLC control circuit board, which can accurately control the movement of the first motor, the second electric telescopic rod and other components, to ensure accurate positioning of the cutting saw blade and the creasing forming roller, and avoid processing deviation; the corrugated cardboard positioning plate is fixed on the corrugated cardboard cutting machine frame by fixing bolts and connecting threaded holes, providing stable support for the corrugated cardboard, and the pressure limiting plate driven by the first electric telescopic rod pressures and limits the cardboard downward, further preventing the cardboard from shifting during processing; the guide pressure roller presses down the cardboard synchronously during the cutting or creasing process, avoiding processing errors caused by the cardboard lifting; the multi-positioning structure makes the cutting and creasing dimensions accurate and improves product consistency; (2) The corrugated cardboard creasing and forming device of this utility model, through the corrugated cardboard creasing and forming component, drives the rotating plate to rotate through the second motor, which can quickly switch the working position of the cutting saw blade and the creasing forming roller; when cutting, it rotates to the point where the cutting saw blade contacts the cardboard, and when creasing, it switches to the point where the creasing forming roller is in contact with the cardboard, without the need to change equipment or transfer cardboard, which greatly shortens the process interval; the first motor drives the rotating frame to rotate through the drive shaft, which can drive the cutting or creasing components to flexibly adjust the processing angle and position to adapt to the processing needs of different shapes; the integrated design reduces equipment investment and operation steps, and significantly improves processing efficiency.

[0013] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a corrugated cardboard creasing and forming device proposed in this utility model; Figure 2 A schematic diagram showing a three-dimensional view of a partial structure of a corrugated cardboard creasing and forming apparatus according to an embodiment of this application is provided; Figure 3 A schematic diagram showing a three-dimensional view of a portion of the structure of the dust collection box and dust pump provided according to an embodiment of this application; Figure 4 A schematic diagram showing a three-dimensional view of a portion of the structure of the drive motor and cutting saw blade provided according to an embodiment of this application is shown.

[0015] Figure label: 1. Corrugated cardboard positioning and cutting assembly; 2. Corrugated cardboard creasing and forming assembly; 3. Corrugated cardboard cutting machine frame; 4. Cardboard drop hole; 5. Support frame; 6. Positioning and shooting camera; 7. Corrugated cardboard positioning and placement plate; 8. Connecting threaded hole; 9. First protective cover; 11. First motor; 12. Drive shaft; 13. Rotating frame; 14. Battery; 15. First electric telescopic rod; 16. Lower pressure limit plate; 17. Second electric telescopic rod; 18. Mounting frame; 19. Third electric telescopic rod; 20. Guide box; 21. Sliding frame; 22. Second motor; 23. Second protective cover; 24. Rotating plate; 25. Drive motor; 26. Cutting saw blade; 31. Third motor; 32. Lead screw; 33. Auxiliary frame; 34. Guide pressure roller; 35. Crease forming roller; 36. Dust collection box; 37. Dust collection pump; 38. Dust collection hose; 39. Dust collection head. Detailed Implementation

[0016] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings; The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] refer to Figure 1-4 A corrugated cardboard creasing and forming device includes a corrugated cardboard cutting frame 3, a plurality of cardboard drop holes 4 are provided on the top of the corrugated cardboard cutting frame 3, a support frame 5 is fixedly installed on the rear side of the corrugated cardboard cutting frame 3, a first protective cover 9 is fixedly installed on the top inner wall of the support frame 5, and a corrugated cardboard positioning and cutting component 1 and a corrugated cardboard creasing and forming component 2 are provided on the first protective cover 9. The corrugated cardboard positioning and cutting assembly 1 includes a first motor 11, a drive shaft 12, a rotating frame 13, a battery 14, a first electric telescopic rod 15, and a downward pressure limiting plate 16. The first motor 11 is fixedly installed inside the first protective cover 9. The drive shaft 12 is fixedly installed at the output end of the first motor 11. The rotating frame 13 is fixedly installed at the output end of the drive shaft 12. The battery 14 is fixedly installed at the bottom of the rotating frame 13. The first electric telescopic rod 15 is fixedly installed at the bottom of the rotating frame 13. The downward pressure limiting plate 16 is fixedly installed at the output end of the first electric telescopic rod 15. The first electric telescopic rod 15 and the battery 14 are electrically connected.

[0018] In this embodiment, a corrugated cardboard positioning plate 7 is fixedly installed on the top of the corrugated cardboard cutting machine frame 3. Both the corrugated cardboard positioning plate 7 and the top of the corrugated cardboard cutting machine frame 3 are provided with connecting threaded holes 8. The corrugated cardboard positioning plate 7 is connected to the connecting threaded holes 8 by fixing bolts. A positioning camera 6 is fixedly installed on the rear inner wall of the support frame 5. The positioning camera 6 is existing technology. It is equipped with a PLC control circuit board, which can position and move the first motor 11, the second electric telescopic rod 17 and the third electric telescopic rod 19, so that the cutting saw blade 26 and the creasing forming roller 35 can be more accurate during cutting and creasing, and there will be no deviation.

[0019] In this embodiment, the corrugated cardboard positioning and cutting assembly 1 further includes a second electric telescopic rod 17, a mounting frame 18, a third electric telescopic rod 19, and a guide box 20. The second electric telescopic rod 17 is fixedly installed on the inner side of the rotating frame 13 and is electrically connected to the battery 14. The mounting frame 18 is fixedly installed on the output end of the second electric telescopic rod 17. The third electric telescopic rod 19 is fixedly installed on the bottom of the mounting frame 18 and is electrically connected to the battery 14. The guide box 20 is fixedly installed on the output end of the third electric telescopic rod 19.

[0020] In this embodiment, a sliding frame 21 is slidably installed on the inner side of the guide box 20. A second motor 22 is fixedly installed on one side of the sliding frame 21, and a second protective cover 23 is fixedly installed on the outer side of the second motor 22. A rotating plate 24 is fixedly installed at the output end of the second motor 22, and a drive motor 25 is fixedly installed on one side of the rotating plate 24. A cutting saw blade 26 is fixedly installed at the output end of the drive motor 25. The second motor 22 can drive the rotating plate 24 to rotate. The rotating plate 24 can adjust the position of the cutting saw blade 26 or the creasing forming roller 35 by rotating, allowing them to exchange positions. When cutting is required, the second motor 22 can be controlled to drive the rotating plate 24 to rotate and adjust the position of the cutting saw blade 26 so that the cutting saw blade 26 contacts the corrugated cardboard to achieve the cutting operation. When creasing and shaping are required, the second motor 22 can be controlled to drive the rotating plate 24 to rotate again, so that the cutting saw blade 26 is separated from the corrugated cardboard and the creasing forming roller 35 contacts the corrugated cardboard.

[0021] In this embodiment, the corrugated cardboard creasing and forming assembly 2 includes a third motor 31, a lead screw 32, an auxiliary frame 33, a guide roller 34, and a creasing forming roller 35. The third motor 31 is fixedly installed on one side of the inner wall of the guide box 20, the lead screw 32 is fixedly installed on the output end of the third motor 31, the sliding frame 21 is threadedly installed on the outside of the lead screw 32, the auxiliary frame 33 is fixedly installed on the front and rear sides of the second protective cover 23, the guide roller 34 is rotatably installed on one side of the auxiliary frame 33, and the creasing forming roller 35 is rotatably installed on one side of the rotating plate 24. The guide roller 34 can press down and limit the corrugated cardboard during the movement of the creasing forming roller 35 or the cutting saw blade 26 to prevent the corrugated cardboard from shifting or warping.

[0022] In this embodiment, the corrugated cardboard creasing and forming assembly 2 further includes a dust collection box 36, a dust pump 37, a dust collection hose 38, and a dust collection head 39. The dust collection box 36 is fixedly installed on one side of the guide box 20, and the dust pump 37 is fixedly installed at the bottom of the dust collection box 36. The suction end of the dust pump 37 is connected to the dust collection box 36, and a protective filter screen is fixedly installed at the suction end of the dust pump 37. One end of the dust collection hose 38 is fixedly installed at the bottom of the dust collection box 36, and the dust collection head 39 is fixedly installed at the other end of the dust collection hose 38. The dust collection hose 38 is made of stainless steel, which prevents the dust collection head 39 from deforming or shifting. It allows the waste dust generated by the cutting saw blade 26 during the cutting of the corrugated cardboard to be absorbed into the interior of the dust collection box 36. A collection drawer is slidably installed inside the dust collection box 36, which can effectively prevent dust from spreading.

[0023] In this embodiment, a guide groove is provided on one side of the guide box 20, and the sliding frame 21 is slidably installed on the inner side of the guide groove. The guide groove can make the sliding frame 21 more stable during the sliding process, and during the cutting process, some waste chips are difficult to pass through the guide groove and enter the lead screw 32, so that the device operates more stably.

[0024] In this embodiment, anti-slip rubber pads are provided on the outer sides of both the guide roller 34 and the creasing forming roller 35. The anti-slip rubber pads can make the guide roller 34 and the creasing forming roller 35 more stable during movement, and prevent the corrugated cardboard from being damaged during the creasing process.

[0025] The positioning and shooting camera 6, the first motor 11, the first electric telescopic rod 15, the second electric telescopic rod 17, the third electric telescopic rod 19, the drive motor 25, the third motor 31, and the vacuum pump 37 are all mature and standardized existing technology components in the field of industrial equipment. Their internal structure, working principle and basic functions have been widely disclosed in the industry and have formed general technical specifications. Therefore, there is no need to repeat them in this utility model patent document.

[0026] Specifically, the positioning camera 6 on the rear side of the support frame 5 has a built-in PLC control circuit board, which can precisely control the movement of components such as the first motor 11 and the second electric telescopic rod 17, ensuring accurate positioning of the cutting saw blade 26 and the creasing forming roller 35 and avoiding processing deviation. The corrugated cardboard positioning plate 7 is fixed to the corrugated cardboard cutting machine frame 3 by fixing bolts and connecting threaded holes 8, providing stable support for the corrugated cardboard. Together with the pressure limiting plate 16 driven by the first electric telescopic rod 15, it presses down and limits the cardboard, further preventing the cardboard from shifting during processing. The guide pressure roller 34 presses down on the cardboard synchronously during cutting or creasing, avoiding processing errors caused by the cardboard lifting. The multi-positioning structure ensures accurate cutting and creasing dimensions and improves product consistency. The second motor 22 drives the rotating plate 24 to rotate, which can switch the working positions of the cutting saw blade 26 and the creasing forming roller 35. During cutting, the plate rotates until the cutting saw blade 26 contacts the cardboard, and during creasing, the plate rotates until the creasing forming roller 35 is in contact with the cardboard. This eliminates the need to change equipment or transfer cardboard, significantly shortening the process interval. The first motor 11 drives the rotating frame 13 to rotate through the drive shaft 12, which can flexibly adjust the processing angle and position of the cutting or creasing components to adapt to the processing needs of different shapes. The integrated design reduces equipment investment and operating steps, significantly improving processing efficiency. The device adapts to the processing of different specifications of cardboard through a multi-dimensional adjustable structure; the second electric telescopic rod 17 can drive the mounting frame 18 to move back and forth, and the third electric telescopic rod 19 can drive the guide box 20 to rise and fall, and cooperate with the third motor 31 to drive the lead screw 32 to drive the sliding frame 21 to slide left and right, so as to realize the flexible movement of the cutting saw blade 26 and the creasing forming roller 35 in three-dimensional space, adapting to the processing needs of cardboard of different sizes; the corrugated cardboard positioning plate 7 is detachably connected to the fixing bolt through the connecting threaded hole 8, and different sizes of corrugated cardboard positioning plate 7 can be replaced according to the cardboard specifications, further expanding the adaptability of the device; the anti-slip rubber pads on the outside of the guide pressure roller 34 and the creasing forming roller 35 can adapt to the processing of cardboard of different thicknesses and avoid damage to the cardboard during creasing; The dust collection box 36, dust pump 37, rigid suction hose 38, and dust head 39 form a complete dust collection system. The dust head 39 is precisely aligned with the cutting area of ​​the cutting saw blade 26. The waste dust generated during cutting is collected in the dust collection box 36 by the suction of the dust pump 37, passing through the dust head 39 and the rigid suction hose 38. The rigid suction hose 38 is made of rigid material to ensure the stability of the dust head 39 and prevent deformation and displacement that would reduce the dust collection effect. The collection drawer inside the dust collection box 36 can be easily pulled out for cleaning, and the protective filter at the suction end of the dust pump 37 can prevent large particles of waste from entering the pump body and causing damage. This design effectively avoids the spread of waste, improves the workshop processing environment, and reduces manual cleaning costs. The guide groove on one side of the guide box 20 provides stable guidance for the sliding frame 21, while preventing waste from entering the lead screw 32 area, thus avoiding jamming or wear of the lead screw 32; the first protective cover 9 and the second protective cover 23 respectively protect the first motor 11 and the second motor 22, preventing dust and waste from entering the motor and affecting its operation; when the rotating plate 24 drives the cutting saw blade 26 or the creasing forming roller 35 to switch, the guide roller 34 on the auxiliary frame 33 always remains in contact with the cardboard, avoiding structural impact caused by the cardboard shaking when switching parts; each electric telescopic rod and motor is electrically connected to the battery 14, ensuring stable power supply and easy mobility.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrugated cardboard indentation forming device, characterized by, include: A corrugated cardboard cutting machine frame (3) is provided with multiple cardboard drop holes (4) on the top of the corrugated cardboard cutting machine frame (3). A support frame (5) is fixedly installed on the rear side of the corrugated cardboard cutting machine frame (3). A first protective cover (9) is fixedly installed on the inner wall of the top of the support frame (5). A corrugated cardboard positioning and cutting component (1) and a corrugated cardboard creasing and forming component (2) are provided on the first protective cover (9). The corrugated cardboard positioning and cutting assembly (1) includes a first motor (11), a drive shaft (12), a rotating frame (13), a battery (14), a first electric telescopic rod (15), and a pressure limiting plate (16). The first motor (11) is fixedly installed inside the first protective cover (9). The drive shaft (12) is fixedly installed at the output end of the first motor (11). The rotating frame (13) is fixedly installed at the output end of the drive shaft (12). The battery (14) is fixedly installed at the bottom of the rotating frame (13). The first electric telescopic rod (15) is fixedly installed at the bottom of the rotating frame (13). The pressure limiting plate (16) is fixedly installed at the output end of the first electric telescopic rod (15). The first electric telescopic rod (15) and the battery (14) are electrically connected.

2. A corrugated paperboard creasing forming apparatus as defined in claim 1, wherein, A corrugated cardboard positioning plate (7) is fixedly installed on the top of the corrugated cardboard cutting machine frame (3). Both the corrugated cardboard positioning plate (7) and the top of the corrugated cardboard cutting machine frame (3) are provided with connecting threaded holes (8). The corrugated cardboard positioning plate (7) is connected to the connecting threaded holes (8) by fixing bolts. A positioning camera (6) is fixedly installed on the rear inner wall of the support frame (5).

3. A device for creasing corrugated board according to claim 1, characterized in that The corrugated cardboard positioning and cutting assembly (1) further includes a second electric telescopic rod (17), a mounting frame (18), a third electric telescopic rod (19), and a guide box (20). The second electric telescopic rod (17) is fixedly installed on the inner side of the rotating frame (13) and is electrically connected to the battery (14). The mounting frame (18) is fixedly installed on the output end of the second electric telescopic rod (17). The third electric telescopic rod (19) is fixedly installed on the bottom of the mounting frame (18) and is electrically connected to the battery (14). The guide box (20) is fixedly installed on the output end of the third electric telescopic rod (19).

4. A corrugated paperboard creasing forming apparatus as defined in claim 3, wherein, A sliding frame (21) is slidably installed on the inner side of the guide box (20). A second motor (22) is fixedly installed on one side of the sliding frame (21). A second protective cover (23) is fixedly installed on the outer side of the second motor (22). A rotating plate (24) is fixedly installed at the output end of the second motor (22). A drive motor (25) is fixedly installed on one side of the rotating plate (24). A cutting saw blade (26) is fixedly installed at the output end of the drive motor (25).

5. A corrugated paperboard creasing forming apparatus as defined in claim 4, wherein, The corrugated cardboard creasing and forming assembly (2) includes a third motor (31), a lead screw (32), an auxiliary frame (33), a guide roller (34), and a creasing forming roller (35). The third motor (31) is fixedly installed on the inner wall of one side of the guide box (20). The lead screw (32) is fixedly installed at the output end of the third motor (31). The sliding frame (21) is threaded onto the outside of the lead screw (32). The auxiliary frame (33) is fixedly installed on the front and rear sides of the second protective cover (23). The guide roller (34) is rotatably installed on one side of the auxiliary frame (33). The creasing forming roller (35) is rotatably installed on one side of the rotating plate (24).

6. A corrugated paperboard creasing forming apparatus as defined in claim 5, wherein, The corrugated cardboard creasing and forming assembly (2) also includes a vacuum box (36), a vacuum pump (37), a vacuum hose (38), and a vacuum head (39). The vacuum box (36) is fixedly installed on one side of the guide box (20). The vacuum pump (37) is fixedly installed at the bottom of the vacuum box (36). The suction end of the vacuum pump (37) is connected to the vacuum box (36). A protective filter screen is fixedly installed at the suction end of the vacuum pump (37). One end of the vacuum hose (38) is fixedly installed at the bottom of the vacuum box (36), and the vacuum head (39) is fixedly installed at the other end of the vacuum hose (38).

7. A corrugated paperboard creasing forming apparatus as defined in claim 4, wherein, The guide box (20) has a guide groove on one side, and the sliding frame (21) is slidably installed on the inner side of the guide groove.

8. A corrugated paperboard creasing forming apparatus as defined in claim 5, wherein, The outer sides of both the guide roller (34) and the indentation forming roller (35) are fitted with anti-slip rubber pads.

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