Automatic slitting device for plastic packaging bag

Abstract

The utility model discloses an automatic slitting device for a plastic packaging bag, and particularly relates to the technical field of slitting of the plastic packaging bag, the automatic slitting device comprises a base, the inner walls of the two sides of the base are both rotatably connected with connecting shafts, the corresponding ends of the two connecting shafts are both fixedly provided with fixing discs, and an air injection cylinder is jointly installed between the two fixing discs; when the slitting device is used, operation is easy, the slitting distance can be adjusted according to needs, meanwhile, a large number of air cylinders do not need to be purchased, adjustment of the slitting distance can be completed only through a small number of devices, and the slitting device is simple in structure, convenient to use and high in practicability. And meanwhile, the appearance neatness of the plastic packaging tape can be guaranteed, dust is swept outwards and prevented from falling into the position of a slitting cutter, and the service life of the cutter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging bag cutting, and more specifically, to an automatic cutting device for plastic packaging bags. Background Art

[0002] Plastic packaging bags have a wide range of uses due to their good waterproof and preservation properties. In daily life, many commodities are packaged in plastic packaging bags to ensure the integrity of the commodities inside. In the process of making plastic packaging bags, a plastic packaging bag cutting device is required.

[0003] In Chinese utility model patents, such as the utility model of CN219990724U, a plastic packaging bag slitting device is disclosed, including a frame. In the utility model, a pressure wheel is used to flatten the plastic bag to prevent the edge of the plastic bag from curling, thereby avoiding slitting errors in the slitting packaging bag. The blade extension and retraction can be adjusted by the cylinder to form a preset distance between the two extended blades. The automatic adjustment can effectively speed up the efficiency of the spacing adjustment to adapt to the cutting requirements of different plastic bags. No manual operation is required during adjustment, which is more convenient.

[0004] The above technology can freely retract the blades when in use, thereby changing the preset distance between the two blades. However, the extension and retraction of one blade requires synchronous extension and retraction at both ends by two cylinders, and the setting of multiple blades requires the purchase of more cylinders for adjustment, which undoubtedly increases the manufacturing cost of the equipment. At the same time, the dust on the surface of each plastic bag is not cleaned before slitting the plastic bag, which affects the appearance quality of the plastic bag. At the same time, if dust particles enter the slitting equipment, especially when they come into contact with the tool, they may accelerate the wear of the tool and affect the service life of the tool. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an automatic cutting device for plastic packaging bags. The technical problem to be solved by the present invention is: the cost of adjusting the extension and retraction of the blade in the comparative technology is relatively high, and the plastic bags are not cleaned before cutting, which affects the appearance quality of the plastic bags and the service life of the tool.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The automatic slitting device for plastic packaging bags comprises a base, connecting shafts are rotatably connected to the inner walls on both sides of the base, fixed disks are fixedly installed at corresponding ends of the two connecting shafts, an air injection cylinder is commonly installed between the two fixed disks, and a plurality of telescopic sleeves are symmetrically installed between the two fixed disks, each telescopic sleeve is connected to the air injection cylinder through a connecting mechanism, a fixed disk is installed on each of the connecting mechanisms, a second sealing piston is slidably connected in each telescopic sleeve, a blade is fixedly installed on the outer side of each second sealing piston, a first sealing piston is slidably connected in the air injection cylinder, an electric telescopic rod is fixedly installed on the bottom wall of the air injection cylinder, and one end of the electric telescopic rod is fixedly connected to the outer side of the first sealing piston;

[0008] A driving mechanism is provided on the outside of the base, and the driving mechanism is connected to one of the connecting shafts. Cleaning rollers are connected to the inner walls on both sides of the base and rotate together. Multiple cleaning brushes are installed on the outside of the cleaning rollers. The driving mechanism drives the cleaning rollers and the connecting shaft to rotate in opposite directions through a transmission mechanism.

[0009] like Figure 1-5 As shown, the specific implementation method is as follows: by arranging an electric telescopic rod, a first sealing piston, a connecting mechanism, and a valve, the electric telescopic rod can push the air in the air injection cylinder through the connecting mechanism and push it into the telescopic sleeve. At the same time, the valve can cut off the connecting mechanism for conveying the telescopic sleeve. Through the second sealing piston and the blade, the air is ventilated into the telescopic sleeve, thereby pushing the blade to slide outward through the second sealing piston. At the same time, the extension length of the blade can be controlled by the sliding distance of the first sealing piston. The cleaning roller can be controlled to rotate through the driving mechanism and the transmission mechanism, and then the cleaning roller drives the cleaning brush to rotate to sweep the dust outward to prevent dust from entering the cutting position.

[0010] In a preferred embodiment, the connecting mechanism includes an air injection pipe, and the air injection pipe is fixedly installed on the outside of the fixed plate at a corresponding position, and the air injection pipe is connected to the air injection cylinder. The end of the air injection pipe away from the air injection cylinder is fixed and connected to a connecting seat, and the outside of the connecting seat is fixed and connected to multiple connecting seats, and the other end of each connecting seat is connected to the telescopic sleeve at a corresponding position, and a valve is installed on each of the connecting pipes.

[0011] In a preferred embodiment, the driving mechanism includes a motor, and the motor is fixedly mounted on the outside of the base, and the output shaft of the motor is connected to a corresponding connecting shaft.

[0012] In a preferred embodiment, the transmission mechanism includes a rotating shaft, and the rotating shaft is rotatably connected to the outer side of the base, the motor is connected to the rotating shaft through a synchronization mechanism, a driving gear is installed on the rotating shaft, one end of the cleaning roller passes through the base and is installed with a driven gear, and the driving gear is meshed with the driven gear.

[0013] In a preferred embodiment, the synchronization mechanism includes two synchronization wheels, and the two synchronization wheels are respectively installed on the output shaft and the rotating shaft of the motor, and the two synchronization wheels are jointly provided with a synchronization belt.

[0014] In a preferred embodiment, the pitch circle diameter length of the driving gear is smaller than the pitch circle diameter length of the driven gear.

[0015] In a preferred embodiment, a cavity is provided inside one of the connecting shafts, and the connecting seat and the gas injection pipe are both located in the cavity.

[0016] In a preferred embodiment, a plurality of support plates are fixedly mounted on the outer side of the connecting shaft, and the outer side of each support plate is fixedly connected to the bottom surface of the telescopic sleeve.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The utility model sets a first sealing piston, a second sealing piston, an electric telescopic rod, a valve and other devices, so that the electric telescopic rod drives the sliding of the first sealing piston to inject air into the telescopic sleeve, thereby mobilizing the second sealing piston to slide, so that the blade is pushed outward and different telescopic sleeves can be cut through the valve, thereby adjusting the slitting distance as needed. At the same time, the device does not need to purchase a large number of cylinders, and only requires less equipment to complete the adjustment of the slitting distance, reducing the manufacturing cost of the device.

[0019] 2. The utility model realizes that the motor drives the connecting shaft to rotate while the synchronous mechanism drives the rotating shaft to rotate by arranging the driving gear, the driven gear, the cleaning roller, the cleaning brush and other devices, and at the same time drives the cleaning roller to rotate in the opposite direction through the driving gear and the driven gear, and then cleans the surface of the plastic packaging bag through the cleaning brush, thereby ensuring the neatness of the appearance of the plastic packaging belt and sweeping the dust outward to prevent the dust from falling into the slitting tool position, thereby extending the service life of the tool.

[0020] To sum up, the utility model is easy to operate during use, and the slitting distance can be adjusted as needed. At the same time, the device does not need to purchase a large number of cylinders, and only requires less equipment to complete the adjustment of the slitting distance, thereby reducing the manufacturing cost of the device. At the same time, it can ensure the neatness of the appearance of the plastic packaging belt, and at the same time sweep the dust outward to prevent dust from falling into the slitting tool position, thereby extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the automatic cutting device for plastic packaging bags proposed in the utility model;

[0022] Figure 2This is a schematic diagram of the connecting shaft installation structure of the automatic slitting device for plastic packaging bags proposed in the utility model;

[0023] Figure 3 This is a schematic cross-sectional view of the air injection cylinder of the automatic cutting device for plastic packaging bags proposed in the present invention;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the connecting shaft of the automatic slitting device for plastic packaging bags proposed in the utility model;

[0025] Figure 5 This is a schematic cross-sectional view of the telescopic sleeve of the automatic cutting device for plastic packaging bags proposed in the utility model.

[0026] In the figure: 1 base, 2 rotating shaft, 3 cleaning roller, 4 driving gear, 5 driven gear, 6 synchronous wheel, 7 synchronous belt, 8 motor, 9 connecting shaft, 10 fixed plate, 11 telescopic sleeve, 12 blade, 13 connecting pipe, 14 valve, 15 gas injection cylinder, 16 support plate, 17 electric telescopic rod, 18 first sealing piston, 19 gas injection pipe, 20 connecting seat, 21 second sealing piston. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Reference Figure 1-5 , the automatic cutting device for plastic packaging bags includes a base 1, on both sides of the inner wall of the base 1 are rotatably connected with a connecting shaft 9, the corresponding ends of the two connecting shafts 9 are fixedly installed with a fixed disk 10, a gas injection cylinder 15 is installed between the two fixed disks 10, and a plurality of telescopic sleeves 11 are symmetrically installed between the two fixed disks 10, each telescopic sleeve 11 is connected to the gas injection cylinder 15 through a connecting mechanism, each connecting mechanism is equipped with a fixed disk 10, each telescopic sleeve 11 is slidably connected with a second sealing piston 21, the outer side of each second sealing piston 21 is fixedly installed with a blade 12, the gas injection cylinder 15 is slidably connected with a first sealing piston 18, and an electric telescopic rod 17 is fixedly installed on the bottom wall of the gas injection cylinder 15, and one end of the electric telescopic rod 17 is fixedly connected to the outer side of the first sealing piston 18;

[0029] A driving mechanism is provided on the outside of the base 1, and the driving mechanism is connected to one of the connecting shafts 9. Cleaning rollers 3 are connected to the inner walls on both sides of the base 1 and rotate together. Multiple cleaning brushes are installed on the outside of the cleaning rollers 3. The driving mechanism drives the cleaning rollers 3 and the connecting shaft 9 to rotate in the opposite direction through the transmission mechanism.

[0030] It is worth noting that the tensioning device and conveying device of the plastic packaging bag have been described in detail in the comparative documents, so they will not be repeated here.

[0031] like Figure 1-5 As shown, the specific implementation method is as follows: by arranging an electric telescopic rod 17, a first sealing piston 18, a connecting mechanism, and a valve 14, the electric telescopic rod 17 can push the air in the gas injection cylinder 15 to be pushed into the telescopic sleeve 11 through the connecting mechanism, and at the same time, the valve 14 can cut off the connecting mechanism of the conveying telescopic sleeve 11, and the gas is vented into the telescopic sleeve 11 through the second sealing piston 21 and the blade 12, thereby pushing the blade 12 to slide outward through the second sealing piston 21. At the same time, the extension length of the blade 12 can be controlled by injecting the sliding distance of the first sealing piston 18, and the cleaning roller 3 can be controlled to rotate through the driving mechanism and the transmission mechanism, and then the cleaning roller 3 drives the cleaning brush to rotate to sweep the dust outward to prevent dust from entering the cutting position.

[0032] The connecting mechanism includes an air injection pipe 19, and the air injection pipe 19 is fixedly installed on the outside of the fixed disk 10 at the corresponding position, and the air injection pipe 19 is connected to the air injection cylinder 15. The end of the air injection pipe 19 away from the air injection cylinder 15 is fixed and connected to a connecting seat 20, and the outside of the connecting seat 20 is fixed and connected to multiple connecting seats 20, and the other end of each connecting seat 20 is connected to the telescopic sleeve 11 at the corresponding position, and a valve 14 is installed on each connecting pipe 13.

[0033] It is worth noting that the valve 14 can be a plug valve, the main component of which is a rotatable plug. The seal between the plug and the valve body is achieved through a special sealing surface. It does not have a complex mechanism inside, and the plug valve can provide reliable sealing performance, which can effectively prevent gas leakage even when the connecting pipe 13 rotates.

[0034] The driving mechanism includes a motor 8 , and the motor 8 is fixedly mounted on the outside of the base 1 , and the output shaft of the motor 8 is connected to a connecting shaft 9 at a corresponding position.

[0035] The transmission mechanism includes a rotating shaft 2, and the rotating shaft 2 is rotatably connected to the outer side of the base 1. The motor 8 is connected to the rotating shaft 2 through a synchronization mechanism. A driving gear 4 is installed on the rotating shaft 2. One end of the cleaning roller 3 passes through the base 1 and is installed with a driven gear 5, and the driving gear 4 is engaged with the driven gear 5.

[0036] The motor 8 drives the rotating shaft 2 to rotate, which in turn drives the driving gear 4 to rotate, and further drives the driven gear 5 to rotate.

[0037] The synchronization mechanism includes two synchronization wheels 6 , and the two synchronization wheels 6 are respectively mounted on the output shaft of the motor 8 and the rotating shaft 2 , and the two synchronization wheels 6 are jointly sleeved with a synchronization belt 7 .

[0038] The pitch circle diameter length of the driving gear 4 is smaller than the pitch circle diameter length of the driven gear 5, thereby increasing the transmission ratio and causing the cleaning roller 3 to rotate slowly, thereby avoiding affecting the normal transportation of the plastic bags.

[0039] A cavity is provided inside one of the connecting shafts 9 , and the connecting seat 20 and the gas injection pipe 19 are both located in the cavity to avoid affecting the normal rotation of the connecting shaft 9 .

[0040] A plurality of support discs 16 are fixedly mounted on the outside of the connecting shaft 9, and the outside of each support disc 16 is fixedly connected to the bottom surface of the telescopic sleeve 11. The support discs 16 support the telescopic sleeve 11 from the bottom, thereby enhancing the stability and load-bearing capacity of the telescopic sleeve 11.

[0041] When the utility model is used, the plastic packaging bag is conveyed through the external conveying device, and the motor 8 is started to drive the connecting shaft 9 to rotate, and the rotating shaft 2 is driven to rotate by the setting of the synchronous belt 7 and the synchronous wheel 6. The driving gear 4 is installed on the rotating shaft 2, which drives the driven gear 5 and the connecting shaft 9 to rotate in the opposite direction, and then drives the cleaning roller 3 to clean the dust on the surface of the plastic packaging bag outwards, ensuring the neatness of the appearance of the plastic packaging bag, and preventing dust from falling into the position of the slitting tool;

[0042] At the same time, when the connecting shaft 9 rotates, it drives each blade 12 to cut the plastic packaging bag. At the same time, when the spacing between the cutters needs to be changed, the connecting pipe 13 at the corresponding position can be closed through the valve 14 as needed. The interior of the closed telescopic sleeve 11 is in a sealed state, and then the first sealing piston 18 is driven inward by the electric telescopic rod 17 to slide, so that the internal gas of the telescopic sleeve 11 that has not been cut is drawn into the gas injection cylinder 15, so that the blade 12 is hidden in the telescopic sleeve 11 through the sliding of the second sealing piston 21. At the same time, the gas injection cylinder 15 and the connected telescopic sleeve 11 are in a sealed state, so the second sealing piston 21 will not slide outward, thereby realizing the adjustment of the cutter spacing, and the adjustment does not require a large number of cylinders, thereby further reducing the cost of the device.

[0043] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic cutting device for plastic packaging bags, comprising a base (1), characterized in that: The inner walls on both sides of the base (1) are rotatably connected with connecting shafts (9), and corresponding ends of the two connecting shafts (9) are fixedly installed with fixed disks (10), and an air injection cylinder (15) is installed between the two fixed disks (10). A plurality of telescopic sleeves (11) are symmetrically installed between the two fixed disks (10), and each telescopic sleeve (11) is connected to the air injection cylinder (15) through a connecting mechanism. A fixed disk (10) is installed on each of the connecting mechanisms. A second sealing piston (21) is slidably connected in each telescopic sleeve (11), and a blade (12) is fixedly installed on the outer side of each second sealing piston (21). A first sealing piston (18) is slidably connected in the air injection cylinder (15), and an electric telescopic rod (17) is fixedly installed on the bottom wall of the air injection cylinder (15), and one end of the electric telescopic rod (17) is fixedly connected to the outer side of the first sealing piston (18); A driving mechanism is provided on the outside of the base (1), and the driving mechanism is connected to one of the connecting shafts (9). Cleaning rollers (3) are connected to the inner walls on both sides of the base (1) for common rotation. A plurality of cleaning brushes are installed on the outside of the cleaning rollers (3). The driving mechanism drives the cleaning rollers (3) and the connecting shaft (9) to rotate in opposite directions through a transmission mechanism.

2. The automatic cutting device for plastic packaging bags according to claim 1, characterized in that: The connecting mechanism includes an air injection pipe (19), and the air injection pipe (19) is fixedly installed on the outside of a fixed plate (10) at a corresponding position, and the air injection pipe (19) is connected to the air injection cylinder (15). One end of the air injection pipe (19) away from the air injection cylinder (15) is fixed and connected to a connecting seat (20), and the outside of the connecting seat (20) is fixed and connected to multiple connecting seats (20), and the other end of each connecting seat (20) is connected to a telescopic sleeve (11) at a corresponding position. A valve (14) is installed on each of the connecting pipes (13).

3. The automatic cutting device for plastic packaging bags according to claim 1, characterized in that: The driving mechanism comprises a motor (8), and the motor (8) is fixedly mounted on the outside of the base (1), and the output shaft of the motor (8) is connected to a connecting shaft (9) at a corresponding position.

4. The automatic cutting device for plastic packaging bags according to claim 3, characterized in that: The transmission mechanism comprises a rotating shaft (2), and the rotating shaft (2) is rotatably connected to the outer side of the base (1); the motor (8) is connected to the rotating shaft (2) through a synchronization mechanism; a driving gear (4) is installed on the rotating shaft (2); one end of the cleaning roller (3) passes through the base (1) and is installed with a driven gear (5), and the driving gear (4) is meshed with the driven gear (5).

5. The automatic cutting device for plastic packaging bags according to claim 4, characterized in that: The synchronization mechanism comprises two synchronization wheels (6), and the two synchronization wheels (6) are respectively mounted on the output shaft of the motor (8) and the rotating shaft (2), and the two synchronization wheels (6) are jointly sleeved with a synchronization belt (7).

6. The automatic cutting device for plastic packaging bags according to claim 4, characterized in that: The pitch circle diameter length of the driving gear (4) is smaller than the pitch circle diameter length of the driven gear (5).

7. The automatic cutting device for plastic packaging bags according to claim 2, characterized in that: A cavity is provided inside one of the connecting shafts (9), and the connecting seat (20) and the gas injection pipe (19) are both located in the cavity.

8. The automatic cutting device for plastic packaging bags according to claim 1, characterized in that: A plurality of support plates (16) are fixedly mounted on the outer side of the connecting shaft (9), and the outer side of each support plate (16) is fixedly connected to the bottom surface of the telescopic sleeve (11).

Images