Efficient scraping mechanism for cutter of bag making machine

Abstract

The utility model relates to an efficient scraping mechanism of a cutter of a bag making machine, which comprises a slitting device with the cutter, and a scraping device is arranged on one side of the cutter. The scraping device comprises a scraping plate frame, a plurality of scraping assemblies which are arranged on the scraping plate frame and loaded with scraping blocks, a scraping sliding mechanism which drives the scraping assemblies to synchronously slide along the outer surface of the cutter, and a scraping steering assembly which drives the scraping blocks to synchronously rotate so that the scraping blocks can abut against or be separated from the cutter. The multiple scraping blocks are arranged on one side of the cutter, the stroke of one original scraping block is segmented through the multiple scraping blocks, and then the multiple scraping blocks are driven by the scraping sliding mechanism and the scraping steering assembly of the scraping device to synchronously slide and rotate, so that the scraping efficiency is improved, and the cleaning requirement of the long cutter is met; and the production speed of the bag making machine is increased, the originally required scraping time is shortened, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bag making machines, and in particular to a high-efficiency scraping mechanism for a bag making machine cutter. Background Technology

[0002] Bags are an indispensable item in people's daily lives. People use bags to store and hold things for convenience in carrying or collecting. With the development of the petrochemical industry, people have gradually developed various kinds of plastic bags, which are not only lightweight but also have a certain strength and toughness, thus greatly increasing the convenience of people's use. At the same time, with the development of the express delivery industry, people are using express delivery bags more and more frequently.

[0003] A bag-making machine is a machine used to produce various plastic or other material packaging bags. Chinese patent application number 2024220425427 discloses a cutting and scraping mechanism for a bag-making machine. This mechanism includes a cutting device with a cutter, and a scraping device on one side of the cutter. The scraping device includes 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. The linear transmission mechanism drives the scraping block to slide back and forth along the outer surface of the cutter. During operation, a scraping steering cylinder drives an eccentric rotation of a drive gear, which in turn drives a driven gear. The driven gear then moves the scraping block into or out of the cutter, thus steering the scraping block. Simultaneously, a scraping lifting cylinder can axially lift the scraping block, bringing it closer to or away from the cutter, achieving axial lifting of the scraping block. This multi-directional motion control of the scraping block adapts to complex cleaning needs. With this configuration, the scraping block steering component and the scraping block lifting component do not interfere with each other and can work collaboratively, conveniently achieving the steering and lifting of the scraping block.

[0004] However, this cutting and scraping mechanism has the following drawbacks in actual use:

[0005] 1. The existing cutting and scraping mechanism uses a linear transmission mechanism to drive a scraping block to slide on the surface of the cutting blade to remove residues on the cutting blade and prevent bag quality problems caused by adhesion. However, as the bag size and the length of the cutting blade increase, the travel distance of the scraping block to slide and scrape the material also becomes longer and longer. This will undoubtedly greatly reduce the production speed of the bag making machine and affect the overall efficiency.

[0006] 2. After multiple cuts, the blades of existing cutters will inevitably wear down to a certain extent. In order to extend the service life of the cutters, workers often need to manually apply maintenance oil to the blade edges. However, this method is inefficient, affects production efficiency, and carries certain risks, such as worker injury. In addition, there is the problem of uneven application. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide a high-efficiency scraping mechanism for the cutting knife of a bag making machine, which addresses the shortcomings of the prior art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency scraping mechanism for a bag-making machine cutter, comprising a cutting device with a cutter, a scraping device on one side of the cutter, the scraping device comprising a scraper frame, multiple scraping components loaded with scraping blocks mounted on the scraper frame, a scraping sliding mechanism that drives the scraping components to slide synchronously along the outer surface of the cutter, and a scraping deflecting component that drives the scraping blocks to rotate synchronously so that the scraping blocks abut or separate from the cutter.

[0009] Using the above technical solution, the scraper blocks can be made of materials such as copper, steel, or cloth. By setting multiple scraper blocks on one side of the cutter, the original stroke of one scraper block is divided into segments by multiple scraper blocks. Then, the scraper sliding mechanism and scraper turning component of the scraper device drive the multiple scraper blocks to slide and rotate synchronously, which improves scraping efficiency, meets the cleaning requirements of long cutters, increases the production speed of bag making machines, shortens the original scraping time, and improves efficiency.

[0010] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured as follows: the scraping steering assembly includes a swing arm, a synchronous swing rod, and a rotation drive source disposed at each scraping assembly on the scraper frame. One end of the swing arm is hinged to the scraper frame, and the other end is connected to the scraping block. All synchronous swing rods are connected to the swing arm, and one of the swing arms is connected to the output end of the rotation drive source. The rotation drive source drives the swing arm to work in conjunction with the synchronous swing rod to make the scraping blocks rotate synchronously.

[0011] Using the above technical solution, the rotation drive source is preferably a cylinder. The scraping components are all connected to one end of the swing arm, and the other end of the swing arm is hinged to the scraper frame. The swing arms are linked together by a synchronous swing rod. In this way, only one cylinder needs to drive one swing arm to swing, so as to realize the synchronous rotation of the scraping block, making the scraping action more coordinated and consistent, and improving the uniformity and efficiency of scraping.

[0012] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured as follows: the scraping assembly includes a steering mounting plate mounted on a scraper frame, an active swing block rotatably mounted on the steering mounting plate, and a driven gear shaft. One end of the driven gear shaft is provided with a driven gear meshing with the active swing block, and the other end passes through the steering mounting plate and is connected to the scraping block. The active swing block is provided with a connecting rod connected to the swing arm. The swing arm drives the active swing block to rotate, causing the scraping block to rotate as well.

[0013] The scraping assembly using the above technical solution includes a steering mounting plate, an active swing block, and a driven gear shaft. The active swing block is connected to a swing arm, and the swing arm drives the active swing block to rotate, thereby causing the scraping block to rotate. Through the design of the steering mounting plate and the active swing block, the scraping block and the swing arm are linked remotely, realizing the flexible steering of the scraping block and enabling the scraping mechanism to adapt to the scraping needs of different positions.

[0014] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured such that: the connecting rod is eccentrically connected to the active swing block, the number of teeth of the active swing block is greater than that of the driven gear, and the scraping block and the driven gear shaft are connected by a material block swing seat.

[0015] By adopting the above technical solution, the eccentric connection of the connecting rod and the gear ratio design between the driven gear and the active swing block improve the swing efficiency and scraping force of the scraper block. This ensures that the steering drive source only needs to rotate a small angle to drive the scraper block to rotate at a large angle, avoiding interference with the normal operation of the cutter. The setting of the material block swing seat also increases the swing diameter of the scraper block, making it convenient and stable to be set at both ends of the cutter blade, thus improving the scraper efficiency.

[0016] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured as follows: a scraping pre-tightening assembly is provided between the steering mounting plate and the scraping block. The scraping pre-tightening assembly includes a pre-tightening spring sleeved on the driven gear shaft, a pre-tightening bracket set on the steering mounting plate, and an upper pre-tightening retaining ring set on the outer circumferential surface of the driven gear shaft. One end of the pre-tightening bracket is connected to the steering mounting plate, and the other end extends to the outer circumferential surface of the driven gear shaft. One end of the pre-tightening spring abuts against the pre-tightening bracket, and the other end abuts against the upper pre-tightening retaining ring, thereby causing the scraping block to form a preload force that lifts it toward one end of the steering mounting plate.

[0017] By adopting the above technical solution and through the design of the scraper pre-tightening component, a constant pre-tightening force is achieved on the scraper block against the cutter, so that the scraper block always has an upward lifting force. This ensures that it automatically moves downward to buffer when entering the cutter edge, and is pulled upward when below the cutter edge, increasing the frictional force against the cutter and improving the scraping effect. It can also automatically compensate for the worn area after the scraper block wears, avoiding ineffective scraping, thereby improving the stability and consistency of the scraping effect.

[0018] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured such that: a lower pre-tightening retaining ring is movably sleeved on the outer circumferential surface of the driven gear shaft; the pre-tightening spring abuts against the pre-tightening bracket through the lower pre-tightening retaining ring; and the upper pre-tightening retaining ring is detachably connected to the driven gear shaft.

[0019] By adopting the above technical solution, the design of the lower preload retaining ring avoids contact between the preload spring and the preload bracket, thus preventing the spring from loosening and bending, and improving stability. The upper preload retaining ring is detachably connected to the driven gear shaft, which facilitates the adjustment of the preload of the spring and adapts to different scraping environments.

[0020] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured as follows: the scraping sliding mechanism includes a scraping base, a scraping drive source disposed on the scraping base, and a linear guide rail disposed between the scraping base and the scraper frame. The linear guide rail is arranged parallel to the cutter. The scraping steering component is fixedly installed on the scraper frame. The output end of the scraping drive source is connected to the scraper frame and drives the scraping component to move back and forth along the linear guide rail.

[0021] Using the above technical solution, the preferred scraping drive source is a scraping cylinder. The scraping cylinder drives the scraper frame and the scraping steering assembly to slide together, realizing the rapid reciprocating movement of the scraping assembly along the cutter, thereby improving the scraping speed and production efficiency.

[0022] The high-efficiency scraping mechanism of the bag making machine cutter described above can be further configured as follows: the scraping base is provided with at least one stroke limiter in the sliding direction of the scraper frame, and the scraper frame is provided with a stroke limit plate for resisting and limiting the stroke limiter.

[0023] By adopting the above technical solution, the stroke limiter and stroke limit plate are designed to achieve precise control of the scraping component's stroke, ensuring the accuracy and safety of the scraping action and preventing ineffective scraping and the scraping block from slipping out.

[0024] The aforementioned efficient scraping mechanism for a bag-making machine cutter can be further configured such that the scraping device also includes an oiling mechanism. The oiling mechanism includes an oil supply valve mounted on the scraping base, a distributor connected to the oil supply valve, and an oil dripping port mounted on one side of each scraping assembly. The oil dripping port is connected to the distributor and sends the lubricating oil from the oil supply valve to the corresponding scraping block through the oil dripping port.

[0025] By adopting the above technical solution and through the design of the oiling mechanism, workers only need to inject lubricating oil at the oil supply valve, and then the lubricating oil is delivered to the dripping interface of each scraping component through the distributor. The dripping interface drips the lubricating oil onto the corresponding scraping block. In this way, when the scraping block scrapes the material on the cutter surface, the cutter is automatically oiled and maintained at the same time, which improves the service life of the cutter and the maintenance efficiency of the scraping mechanism.

[0026] The high-efficiency scraping mechanism of the bag making machine cutter described above can be further configured as follows: each side of the scraping assembly is provided with an oil receiving head that is respectively connected to the distributor; the oil receiving head is connected to the oil dripping interface through a liquid delivery pipe; the oil receiving head is installed on the scraper frame; and the scraping base is provided with a solenoid valve that controls the oil supply of the coating mechanism.

[0027] By adopting the above technical solution, the oil supply of the oiling mechanism is controlled by controlling the solenoid valve, so as to achieve precise oil supply to the scraper block. This eliminates the need for workers to frequently inject oil, and accurately controls the oil supply amount and time, thereby improving the stability and efficiency of the oiling mechanism.

[0028] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0030] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present utility model.

[0031] Figure 3 for Figure 2 Enlarged view of point A.

[0032] Figure 4 This is a schematic diagram showing the connection between the scraping device and the slitting device in an embodiment of this utility model.

[0033] Figure 5 This is a perspective view of the scraping device according to an embodiment of the present utility model.

[0034] Figure 6 This is a three-dimensional schematic diagram of the scraping device after it has slid in an embodiment of the present invention.

[0035] Figure 7 This is an exploded view of the scraping device according to an embodiment of the present invention.

[0036] Figure 8 This is a partial structural schematic diagram of the scraping and steering assembly according to an embodiment of the present invention. Implementation

[0037] like Figures 1-8 As shown, a high-efficiency scraping mechanism for a bag-making machine cutter includes a cutting device 1 with a cutter 11, a scraping device on one side of the cutter 11, and a traction component 2 for feeding materials to the cutter 11 for cutting. The traction component 2 is provided with a heat insulation plate 21 to isolate the high temperature of the cutter 11. The scraping device includes a scraper frame 3, multiple scraping components 4 loaded with scraping blocks 41 on the scraper frame 3, a scraping sliding mechanism that drives the scraping components 4 to slide synchronously along the outer surface of the cutter 11, and a scraping deflection component that drives the scraping blocks 41 to rotate synchronously so that the scraping blocks 41 abut against or separate from the cutter 11.

[0038] like Figures 4-6 As shown, the scraping sliding mechanism includes a scraping base 5, a scraping cylinder 51 mounted on the scraping base 5, and a linear guide rail 52 mounted between the scraping base 5 and the scraper frame 3. The linear guide rail 52 is parallel to the cutter 11. The scraping steering component is fixedly mounted on the scraper frame 3 via a stroke limit plate 53. The output end of the scraping cylinder 51 is connected to the scraper frame 3 and drives the scraping component 4 to move back and forth along the linear guide rail 52. The scraping base 5 is provided with two stroke limiters 54 corresponding to the sliding direction of the scraper frame 3. The stroke limit plate 53 is located between the two stroke limiters 54 and abuts against the stroke limiters 54 as the scraper frame 3 slides, thus limiting the sliding range.

[0039] like Figure 8 As shown, the scraper steering assembly includes a swing arm 6, a synchronous swing rod 61, and a rotating cylinder 62, which are installed on the scraper frame 3 corresponding to each scraper assembly 4. One end of the swing arm 6 is hinged to the scraper frame 3, and the other end is connected to the scraper assembly 4 through a connecting rod 63. The synchronous swing rods are all connected to the swing arm 6. One of the swing arms 6 is connected to the output end of the rotating cylinder 62. The rotating cylinder 62 drives the swing arm 6 to work in conjunction with the synchronous swing rod 61 to make the scraper blocks 41 rotate synchronously.

[0040] like Figure 3 , Figure 8 As shown, the scraper assembly 4 includes a steering mounting plate 42 mounted on the scraper frame 3, an active swing block 43 rotatably mounted on the steering mounting plate 42, and a driven gear shaft 44. One end of the driven gear shaft 44 is provided with a driven gear 441 meshing with the active swing block 43, and the other end passes through the steering mounting plate 42 and is connected to the scraper block 41 through a material block swing seat 45. The active swing block 43 is provided with a connecting rod 63 connected to the swing arm 6. The connecting rod 63 is eccentrically connected to the active swing block 43. The swing arm 6 drives the active swing block 43 to rotate, which in turn drives the scraper block 41 to rotate. The number of teeth of the active swing block 43 is greater than that of the driven gear 441. A scraper pre-tightening assembly is provided between the steering mounting plate 42 and the scraper block 41. The scraper preload assembly includes a preload spring 46 sleeved on the driven gear shaft 44, a preload bracket 47 mounted on the steering mounting plate 42, and an upper preload retaining ring 48 detachably connected to the outer circumferential surface of the driven gear shaft 46. One end of the preload bracket 47 is connected to the steering mounting plate 42, and the other end extends to the outer circumferential surface of the driven gear shaft 44. One end of the preload spring 46 abuts against the preload bracket 47, and the other end abuts against the upper preload retaining ring 48, causing the scraper block 41 to form a preload force that lifts towards one end of the steering mounting plate 42. A lower preload retaining ring 49 is movably sleeved on the outer circumferential surface of the driven gear shaft 46, and the preload spring 46 abuts against the preload bracket 47 through the lower preload retaining ring 49 to prevent the preload spring 46 from shifting.

[0041] likeFigures 1-8 As shown, the scraping device also includes an oiling mechanism, which includes an oil supply valve 7 on the scraping base 5, a distributor 71 connected to the oil supply valve 7, and an oil dripping port 72 on one side of each scraping assembly 4. The oil dripping port 72 and the distributor 7 are respectively connected by hoses, and the lubricating oil at the oil supply valve 7 is dripped into the corresponding scraping block 41 through the oil dripping port 72. Each scraping assembly 4 is provided with an oil inlet 73 that is respectively connected to the distributor 71. The oil inlet 73 and the oil dripping port 72 are connected by a liquid delivery pipe 74. The oil inlet 73 is installed on the scraper frame 3. The scraping base 5 is provided with a solenoid valve group 8. The multiple solenoid valves on the solenoid valve group 8 control the actions of the scraping cylinder 51, the rotating cylinder 62 and the oil supply valve 7 respectively.

Claims

1. A high-efficiency scraping mechanism for a bag-making machine cutter, comprising a cutting device with a cutter, wherein a scraping device is provided on one side of the cutter, characterized in that: The scraping device includes a scraper frame, multiple scraping assemblies loaded with scraping blocks mounted on the scraper frame, a scraping sliding mechanism that drives the scraping assemblies to slide synchronously along the outer surface of the cutter, and a scraping deflection assembly that drives the scraping blocks to rotate synchronously so that the scraping blocks abut against or separate from the cutter.

2. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 1, characterized in that: The scraper steering assembly includes a swing arm, a synchronous swing rod, and a rotation drive source disposed at each scraper assembly corresponding to the scraper frame. One end of the swing arm is hinged to the scraper frame, and the other end is connected to the scraper block. All synchronous swing rods are connected to the swing arm. One of the swing arms is connected to the output end of the rotation drive source. The rotation drive source drives the swing arm to work in conjunction with the synchronous swing rod to make the scraper blocks rotate synchronously.

3. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 2, characterized in that: The scraping assembly includes a steering mounting plate mounted on a scraper frame, an active swing block and a driven gear shaft rotatably mounted on the steering mounting plate. One end of the driven gear shaft is provided with a driven gear that meshes with the active swing block, and the other end passes through the steering mounting plate and is connected to the scraping block. The active swing block is provided with a connecting rod that is connected to the swing arm. The swing arm drives the active swing block to rotate, which in turn causes the scraping block to rotate.

4. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 3, characterized in that: The connecting rod is eccentrically connected to the active swing block, the number of teeth of the active swing block is greater than that of the driven gear, and the scraper block is connected to the driven gear shaft through a material block swing seat.

5. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 3, characterized in that: A scraper pre-tightening assembly is provided between the steering mounting plate and the scraper block. The scraper pre-tightening assembly includes a pre-tightening spring sleeved on the driven gear shaft, a pre-tightening bracket set on the steering mounting plate, and an upper pre-tightening retaining ring set on the outer circumferential surface of the driven gear shaft. One end of the pre-tightening bracket is connected to the steering mounting plate, and the other end extends to the outer circumferential surface of the driven gear shaft. One end of the pre-tightening spring abuts against the pre-tightening bracket, and the other end abuts against the upper pre-tightening retaining ring, thereby causing the scraper block to form a preload force that lifts it toward one end of the steering mounting plate.

6. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 5, characterized in that: The driven gear shaft is movably fitted with a lower preload retaining ring on its outer circumferential surface. The preload spring abuts against the preload bracket through the lower preload retaining ring. The upper preload retaining ring is detachably connected to the driven gear shaft.

7. The high-efficiency scraping mechanism of the bag-making machine cutter according to any one of claims 1-6, characterized in that: The scraping sliding mechanism includes a scraping base, a scraping drive source disposed on the scraping base, and a linear guide rail disposed between the scraping base and the scraper frame. The linear guide rail is arranged parallel to the cutter. The scraping steering component is fixedly installed on the scraper frame. The output end of the scraping drive source is connected to the scraper frame and drives the scraping component to move back and forth along the linear guide rail.

8. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 7, characterized in that: The scraper base is provided with at least one travel limiter in the sliding direction of the scraper frame, and the scraper frame is provided with a travel limit plate for resisting and limiting the travel limiter.

9. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 7, characterized in that: The scraping device also includes an oiling mechanism, which includes an oil supply valve on the scraping base, a distributor connected to the oil supply valve, and an oil dripping port on one side of each scraping assembly. The oil dripping port is connected to the distributor and sends the lubricating oil from the oil supply valve to the corresponding scraping block through the oil dripping port.

10. The high-efficiency scraping mechanism of the bag-making machine cutter according to claim 9, characterized in that: Each of the scraper components is provided with an oil inlet head on one side, which is respectively connected to the distributor. The oil inlet head is connected to the dripping interface through a liquid delivery pipe. The oil inlet head is installed on the scraper frame. The scraper base is provided with a solenoid valve that controls the oil supply of the coating mechanism.

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