A cutting knife and material scraping assembly for a bag making machine

Abstract

This utility model relates to a cutting blade scraping assembly for a bag-making machine, belonging to the technical field of bag-making equipment. It includes: a lifting frame for mounting the cutting blade; a drive assembly connected to the lifting frame for driving its reciprocating motion; a transmission rack fixed to the lifting frame; and a cleaning assembly comprising: a transmission gear meshing with the transmission rack; a rotating rod connected to the transmission gear for rotating under the drive of the transmission gear when the lifting frame moves; and multiple scrapers disposed on the rotating rod for cleaning the cutting blade. This utility model enables the cutting blade to be efficiently cleaned by its own motion driving the cleaning assembly during reciprocating motion, significantly simplifying the structure, reducing energy consumption, and improving cleaning efficiency and equipment stability.

Description

Technical Field

[0001] This application relates to the field of bag making equipment technology, and in particular to a cutting and scraping assembly for a bag making machine. Background Technology

[0002] Bag-making machines, as important automated equipment, play an indispensable role in modern industrial production. They are primarily used to process flexible materials such as plastic film and paper into packaging bags of various specifications. Through core processes such as unwinding, traction, heat sealing, and cutting, they efficiently transform rolls of material into individual bags. This continuous and large-scale production method significantly improves production efficiency, enabling standardized or customized packaging bags to widely serve multiple fields such as food, industry, and agriculture, making it a fundamental piece of equipment for the development of the modern packaging industry.

[0003] During the operation of a bag-making machine, the cutter is one of the key components, and its cleanliness directly affects the quality and efficiency of bag production. Currently, there are several solutions for the scraping mechanism of the cutter in bag-making machines. For example, Chinese utility model patent application CN 223057881 U discloses a scraping mechanism for a cutter in a bag-making machine, which includes a cutter and a scraping device. The scraping device typically consists of a scraper frame, a scraping block mounted on the scraper frame, and a linear transmission mechanism that drives the scraping block to slide relative to the scraper frame. In use, this solution uses a scraping steering cylinder to drive the drive gear to rotate eccentrically, which in turn drives the driven gear to rotate, allowing the scraping block to enter or leave under the cutter, thus achieving the steering of the scraping block. Simultaneously, a scraping lifting cylinder can also drive the scraping block to move axially up or down, bringing it closer to or away from the cutter. This design aims to achieve multi-directional motion control of the scraping block to adapt to complex cleaning needs and ensure that the steering and lifting components do not interfere with each other and work collaboratively, thereby conveniently achieving the steering and lifting of the scraping block.

[0004] However, the cutting and scraping components used in bag-making machines described above often require multiple independent drive units to achieve left-right and up-down movement of the scraper on the cutter. This design results in a complex system structure and a large number of components, leading to higher overall energy consumption. Furthermore, the complex mechanical linkages make it more prone to malfunctions, reducing the equipment's operational stability and reliability, and increasing maintenance costs and downtime. In addition, existing technologies typically use only one or a few small scrapers for reciprocating cleaning. This results in low cleaning efficiency and limited scraping coverage when removing stubborn residues such as sticky white crystals formed by melting talcum powder from the cutter, leading to slow cleaning speeds. This fails to meet the cleaning efficiency requirements of high-speed, continuous production in bag-making machines, thus severely impacting the overall bag-making efficiency and product quality. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0005] This utility model discloses a cutting and scraping assembly for a bag making machine, which aims to solve the technical problems of complex structure, high energy consumption, easy failure and low cleaning efficiency of the cutting and scraping mechanism of the existing bag making machine.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model discloses a cutting blade scraping assembly for a bag making machine, comprising: a lifting frame for mounting the cutting blade; a drive assembly connected to the lifting frame for driving the lifting frame to reciprocate; a transmission rack fixed to the lifting frame; and a cleaning assembly comprising: a transmission gear meshing with the transmission rack; a rotating rod connected to the transmission gear for rotating under the drive of the transmission gear when the lifting frame moves; and a plurality of scrapers disposed on the rotating rod for cleaning the cutting blade.

[0008] This technical solution enables the cutting blade to reciprocate while its own motion drives the cleaning components to clean the blade efficiently, significantly simplifying the structure, reducing energy consumption, and improving cleaning efficiency and equipment stability.

[0009] In this embodiment, the cleaning assembly further includes a mounting bracket with mounting holes and adjustment holes; the rotating rod is mounted on the mounting bracket through the mounting holes or the adjustment holes so that the transmission gear meshes with or disengages from the transmission rack.

[0010] This technical solution enables the engagement or disengagement of the transmission gear and transmission rack of the cleaning component, thereby facilitating the activation or deactivation of the cleaning function and making maintenance and adjustment easier.

[0011] In this embodiment, a rubber component is fixed to the end of the plurality of scrapers away from the rotating rod.

[0012] This technical solution can improve the cleaning effect of the scraper while avoiding damage to the cutter surface and extending the cutter's service life.

[0013] In this embodiment, the drive assembly includes a rotary motor, a rotating disk connected to the output end of the rotary motor, and a transmission rod; one end of the transmission rod is eccentrically connected to the rotating disk, and the other end is connected to the lifting frame.

[0014] This technical solution provides a compact and stable driving method that effectively drives the lifting frame to reciprocate, ensuring the stable operation of the cutter.

[0015] In this embodiment, the lifting frame includes at least two lifting rods and a support plate connecting the at least two lifting rods; the transmission rack is fixed to the lifting rods, and the cutter is fixed to the support plate.

[0016] This technical solution ensures the structural stability of the lifting frame and provides a reliable mounting base for the cutter and transmission rack, guaranteeing the accuracy of their coordinated movement.

[0017] In this embodiment, a guide sleeve is also included, and the lifting rod is slidably disposed within the guide sleeve.

[0018] This technical solution provides stable guidance for the lifting rod, reduces swaying and friction during movement, and improves the smoothness and accuracy of the lifting motion.

[0019] In this embodiment, the cleaning assembly further includes a mounting plate and a bearing disposed on the mounting plate; the rotating rod passes through the bearing, and the mounting plate is detachably fixed to the mounting hole or the adjustment hole of the mounting bracket.

[0020] This technical solution reduces friction during the rotation of the rotating rod, improving transmission efficiency and service life. Furthermore, the detachable mounting plate design greatly facilitates the installation, disassembly, and maintenance of the cleaning components.

[0021] In this embodiment, the plurality of scrapers are arranged radially along the rotating rod.

[0022] This technical solution enables the scraper to form a larger cleaning coverage area when rotating, improving the cleaning efficiency of the cutting surface and ensuring thorough scraping.

[0023] In this embodiment, a connecting strip and an abutment plate are also provided below the cutter.

[0024] This technical solution can provide support or guidance for scraping or collecting waste material below the cutter, further optimizing the scraping process or waste disposal.

[0025] This utility model also discloses a cutting and scraping assembly for a bag making machine, which also includes a frame; the lifting frame, the driving assembly and the cleaning assembly are all mounted on the frame.

[0026] This technical solution provides a stable installation platform for the entire scraping assembly, ensuring stable and reliable collaborative operation of all components. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of the cutting and scraping assembly for a bag-making machine provided in this application embodiment. Figure 1 ;

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3A three-dimensional structural diagram of the cutting and scraping assembly for a bag-making machine provided in this application embodiment. Figure 2 ;

[0030] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0031] Figure 5 A three-dimensional structural diagram of the driving component and the cleaning component provided in the embodiments of this application;

[0032] Figure 6 This is a cross-sectional structural diagram of the scraper provided in an embodiment of this application.

[0033] The following are the labeling elements in the figure:

[0034] 1. Frame; 11. Transmission component; 12. Collection box; 13. Cutter; 2. Drive assembly; 21. Rotary motor; 22. Rotary disc; 23. Transmission rod; 24. Guide sleeve; 25. Lifting frame; 251. Lifting rod; 252. Support plate; 3. Cleaning assembly; 31. Mounting bracket; 32. Mounting hole; 33. Adjustment hole; 34. Rotating rod; 35. Mounting plate; 36. Bearing; 37. Scraper; 38. Rubber parts; 39. Transmission component; 391. Transmission gear; 392. Transmission rack; 4. Connecting strip; 41. Abutment plate. Detailed Implementation

[0035] Traditional bag-making machines, when cutting flexible materials such as plastic film and paper, often accumulate sticky white crystals or debris on their blades after prolonged use. These residues, formed by melting talcum powder, can severely affect the cutting accuracy and efficiency if not removed promptly. Existing technologies, such as the scraping mechanism for bag-making machine blades disclosed in Chinese Utility Model Patent Application No. CN 223057881 U, while providing a scraping device, typically employ multiple drive components to move the scraper horizontally and vertically on the blade. This design not only consumes significant energy but also increases the likelihood of malfunctions due to its complex structure. Furthermore, the scraper is usually small and only performs simple reciprocating movements, resulting in low efficiency in removing stubborn sticky crystals from the blade and difficulty in thoroughly cleaning it. This ultimately affects the overall processing efficiency and product quality of the bag-making machine.

[0036] Based on this, in order to improve the technical problems of complex structure, high energy consumption, easy failure and low cleaning efficiency of the cutting and scraping mechanism of bag making machine in related technologies, the embodiments of this application provide the following solutions.

[0037] Please refer to the following: Figures 1 to 6This application provides a scraping assembly for a cutter 13 in a bag-making machine. The scraping assembly includes: a lifting frame 25 for mounting the cutter 13; a drive assembly 2 connected to the lifting frame 25 for driving the lifting frame 25 to reciprocate; a transmission rack 392 fixed to the lifting frame 25; and a cleaning assembly 3, including: a transmission gear 391 meshing with the transmission rack 392; a rotating rod 34 connected to the transmission gear 391 for rotating under the drive of the transmission gear 391 when the lifting frame 25 moves; and a plurality of scrapers 37 disposed on the rotating rod 34 for cleaning the cutter 13.

[0038] This configuration allows the cutter 13 to efficiently clean itself by driving the cleaning component 3 during its reciprocating motion, significantly simplifying the structure, reducing energy consumption, and improving cleaning efficiency and equipment stability. In this way, the mechanical energy of the cutter 13's reciprocating motion directly drives the cleaning component 3, eliminating the need for a separate drive unit and reducing the complexity of the transmission chain.

[0039] In this embodiment, the cleaning component 3 further includes a mounting bracket 31, which has a mounting hole 32 and an adjustment hole 33. The rotating rod 34 is mounted on the mounting bracket 31 through the mounting hole 32 or the adjustment hole 33 so that the transmission gear 391 engages or disengages with the transmission rack 392.

[0040] This configuration allows for the engagement or disengagement of the transmission gear 391 and transmission rack 392 in the cleaning component 3, thereby facilitating the control of the cleaning function's activation or deactivation and simplifying maintenance and adjustment. In this way, the engagement / disengagement of the gear and rack enables rapid switching between the cleaning function's on / off states.

[0041] In this embodiment, a rubber component 38 is fixed to one end of the plurality of scrapers 37 away from the rotating rod 34.

[0042] This design improves the cleaning effect of the scraper 37 while avoiding damage to the surface of the cutter 13 and extending the service life of the cutter 13.

[0043] In this embodiment, the drive assembly 2 includes a rotary motor 21, a rotary disk 22 connected to the output end of the rotary motor 21, and a transmission rod 23; one end of the transmission rod 23 is eccentrically connected to the rotary disk 22, and the other end is connected to the lifting frame 25.

[0044] This configuration provides a compact and stable drive system that effectively drives the lifting frame 25 to reciprocate, ensuring the stable operation of the cutter 13.

[0045] In this embodiment, the lifting frame 25 includes at least two lifting rods 251 and a support plate 252 connecting the at least two lifting rods 251; the transmission rack 392 is fixed to the lifting rods 251, and the cutter 13 is fixed to the support plate 252.

[0046] This configuration ensures the structural stability of the lifting frame 25 and provides a reliable mounting base for the cutter 13 and the transmission rack 392, guaranteeing the accuracy of their coordinated movement.

[0047] In this embodiment, a guide sleeve 24 is also included, and the lifting rod 251 is slidably disposed within the guide sleeve 24.

[0048] This design provides stable guidance for the lifting rod 251, reduces swaying and friction during movement, and improves the smoothness and accuracy of the lifting motion.

[0049] In this embodiment, the cleaning component 3 further includes a mounting plate 35 and a bearing 36 disposed on the mounting plate 35; the rotating rod 34 passes through the bearing 36, and the mounting plate 35 is detachably fixed to the mounting hole 32 or the adjusting hole 33 of the mounting bracket 31.

[0050] This design reduces friction when the rotating rod 34 rotates, improving transmission efficiency and service life. At the same time, the detachable mounting plate 35 greatly facilitates the installation, disassembly, and maintenance of the cleaning component 3.

[0051] In this embodiment, the plurality of scrapers 37 are arranged radially along the rotating rod 34.

[0052] This configuration allows the scraper 37 to form a larger cleaning coverage area when rotating, improving the cleaning efficiency of the cutter 13 surface and ensuring thorough scraping.

[0053] In this embodiment, a connecting strip 4 and an abutment plate 41 are also provided below the cutter 13.

[0054] This configuration provides support or guidance for scraping or waste collection below the cutter 13, further optimizing the scraping process or waste handling.

[0055] This utility model also discloses a cutting blade 13 scraping assembly for a bag making machine, which also includes a frame 1; the lifting frame 25, the driving assembly 2 and the cleaning assembly 3 are all mounted on the frame 1.

[0056] This setup provides a stable mounting platform for the entire scraping assembly, ensuring stable and reliable coordinated operation of all components.

[0057] The implementation principle of the material scraping assembly for a bag making machine cutter 13 in this embodiment is as follows: When the packaging bag is transported to the lower end of the cutter 13 through the frame 1 and the transmission component 11, the rotating motor 21 in the drive assembly 2 drives the rotating disk 22 to rotate. At the same time, the rotating disk 22 drives the transmission rod 23 to move up and down. The transmission rod 23 is rotatably connected to the lifting frame 25. The transmission rod 23 drives the lifting rod 251 in the lifting frame 25 to move up and down. The lifting rod 251 is sleeved in the guide sleeve 24 and plays a guiding role. The cutter 13 is set on the support plate 252 and drives the cutter 13 to cut the packaging bag on the lifting frame 25. At the same time, the connecting strip 4 and the abutment plate 41 abut against each other, so that the packaging bag has a point of force during the cutting process. During the cutting process of the packaging bag, the mounting plate 35 is set in the adjustment hole 33 on the mounting frame 31, so that the transmission gear 391 is away from the transmission rack 392, and the cleaning assembly 3 does not work.

[0058] When the cutter 13 needs to be cleaned after use, the mounting plate 35 is installed in the mounting hole 32 on the mounting bracket 31, so that the transmission gear 391 meshes with the transmission rack 392 on the lifting rod 251. When the rotating motor 21 drives the lifting rod 251 to rise and fall, the transmission rack 392 drives the transmission gear 391 to rotate. During the rotation of the transmission gear 391, the rotating rod 34 drives the scraper 37 to rotate through the bearing 36 on the mounting plate 35. During the rotation of the scraper 37, the scraper 37 cleans the sticky white crystals on the cutter 13. At the same time, there is a rubber part 38 on the end of the scraper 37 away from the rotating rod 34 to clean the cutter 13, avoiding wear caused by hard contact. The cleaned dirt can be transferred to the collection box 12 by the conveyor belt for centralized cleaning.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting and scraping assembly for a bag-making machine, characterized in that, include: Lifting frame (25), the lifting frame (25) is used to install the cutter (13); A drive assembly (2) is connected to the lifting frame (25) and is used to drive the lifting frame (25) to reciprocate. A transmission rack (392), the transmission rack (392) being fixed to the lifting frame (25); and a cleaning assembly (3), the cleaning assembly (3) comprising: A transmission gear (391) meshes with the transmission rack (392). A rotating rod (34), connected to the transmission gear (391), is used to rotate under the drive of the transmission gear (391) when the lifting frame (25) moves; and Multiple scrapers (37) are disposed on the rotating rod (34) for cleaning the cutter (13).

2. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, The cleaning component (3) also includes a mounting bracket (31), which has a mounting hole (32) and an adjustment hole (33). The rotating rod (34) is mounted on the mounting bracket (31) through the mounting hole (32) or the adjustment hole (33) so that the transmission gear (391) meshes with or separates from the transmission rack (392).

3. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, A rubber component (38) is fixed to one end of the plurality of scrapers (37) away from the rotating rod (34).

4. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, The drive assembly (2) includes a rotary motor (21), a rotary disk (22) connected to the output end of the rotary motor (21), and a transmission rod (23); one end of the transmission rod (23) is eccentrically connected to the rotary disk (22), and the other end is connected to the lifting frame (25).

5. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, The lifting frame (25) includes at least two lifting rods (251) and a support plate (252) connecting the at least two lifting rods (251); the transmission rack (392) is fixed on the lifting rods (251), and the cutter (13) is fixed on the support plate (252).

6. The cutting and scraping assembly for a bag-making machine according to claim 5, characterized in that, It also includes a guide sleeve (24), in which the lifting rod (251) is slidably disposed.

7. The cutting and scraping assembly for a bag-making machine according to claim 2, characterized in that, The cleaning assembly (3) also includes a mounting plate (35) and a bearing (36) disposed on the mounting plate (35); the rotating rod (34) passes through the bearing (36), and the mounting plate (35) is detachably fixed to the mounting hole (32) or the adjusting hole (33) of the mounting bracket (31).

8. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, The plurality of scrapers (37) are arranged radially along the rotating rod (34).

9. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, It also includes a connecting strip (4) and an abutment plate (41) disposed below the cutter (13).

10. The cutting and scraping assembly for a bag-making machine according to claim 1, characterized in that, It also includes a frame (1); the lifting frame (25), the drive assembly (2) and the cleaning assembly (3) are all mounted on the frame (1).

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