Edge sealing mechanism for plastic bag

Abstract

The utility model discloses an edge sealing mechanism for a plastic bag, which relates to the field of plastic bag processing, including a workbench, an edge sealing component, a spacing adjustment device and a driving device, wherein a guide rail is respectively arranged on both sides of the workbench, and the edge sealing component is provided with two, the closing component comprises a connecting plate and a heat sealing strip, both ends of the connecting plate are fixedly connected with a slider, the slider is slidably connected to the guide rail, the heat sealing strip is arranged below the connecting plate, each of the edge sealing components is equipped with a spacing adjustment device, and the driving device is used to drive the guide rail to reciprocate up and down; in the present application, the spacing adjustment device is used to adjust the positions of the two edge sealing components, and when adjusting, it is only necessary to loosen the bolt, drive the gear to rotate through the rotating shaft, and the slider slides on the guide rail, and the bolt is tightened again at a suitable position to fix the position of the slider; when edge sealing, the edge sealing component reciprocates up and down to achieve edge sealing.

Description

Technical Field

[0001] The utility model relates to the field of plastic bag processing, in particular to an edge sealing mechanism for plastic bags. Background Art

[0002] In the production process of plastic bags, the plastic film is usually folded in half, and the folded side is used as the bottom of the plastic bag. Then, edge sealing equipment is used to seal the two sides of the plastic. The position of some existing edge sealing equipment is fixed, which makes it inconvenient to adjust the spacing of the heat sealing strips, which is not conducive to coping with the edge sealing work of plastic bags of various sizes. Utility Model Content

[0003] The purpose of the utility model is to provide an edge sealing mechanism for a plastic bag to solve the problems mentioned in the above background technology.

[0004] A plastic bag edge sealing mechanism comprises a workbench, an edge sealing assembly, a spacing adjustment device and a driving device, wherein a guide rail is respectively provided on both sides of the workbench, and the edge sealing assembly is provided with two, the edge sealing assembly comprises a connecting plate and a heat sealing strip, both ends of the connecting plate are fixedly connected with a slider, the slider is slidably connected to the guide rail, the heat sealing strip is arranged below the connecting plate, each of the edge sealing assemblies is equipped with a spacing adjustment device, the spacing adjustment device comprises a rotating shaft, the rotating shaft is rotatably connected to the slider, both ends of the rotating shaft are provided with a gear, the guide rail is provided with a rack meshing with the gear, and the driving device is used for driving the guide rail to reciprocate up and down, thereby driving the heat sealing strip in the edge sealing assembly to heat and pressurize the plastic bag to achieve the edge sealing effect.

[0005] Preferably, a pressure plate is fixedly connected to the top of the heat sealing strip, a sliding rod is fixedly connected to the pressure plate, the sliding rod is slidably connected to the connecting plate, and a stopper is fixedly connected to the top of the sliding rod, and a spring is provided on the sliding rod between the connecting plate and the pressure plate.

[0006] Preferably, the spacing adjustment device further comprises a locking block, which is located in a slide groove of the guide rail and is locked and fixed with the slider by bolts, thereby fixing the slider on the guide rail.

[0007] Preferably, rotating wheels are provided at both ends of the rotating shaft.

[0008] Preferably, the driving device includes a driving frame and a motor, a driving frame is provided below the guide rail, a guide rod is fixedly connected to the driving frame, the guide rod is fixedly connected to the guide rail, the workbench is located above the driving frame, the guide rod is slidably connected to the workbench, a spring 2 is sleeved on the guide rod between the guide rail and the workbench, the motor is fixedly connected to the side wall of the workbench, and its output shaft is fixedly connected to a driving shaft, the driving shaft is rotatably connected to the workbench, two cams are provided on the driving shaft, and a roller is rotatably connected to the driving frame, and the roller is in tangential contact with the cam.

[0009] The advantages of the utility model are:

[0010] In the present application, a spacing adjustment device is used to adjust the positions of the two edge banding assemblies. When adjusting, it is only necessary to loosen the bolts and then rotate the rotating wheel to drive the gear to rotate through the rotating shaft, so that the slider slides on the guide rail. The position of the slider can be fixed by tightening the bolts again at the appropriate position, thereby fixing the positions of the two edge banding assemblies.

[0011] When edge sealing, the motor drives the cam to rotate, and the edge sealing component is driven to reciprocate up and down through the pressure roller and the reset action of spring 2 to achieve edge sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a front view of the utility model;

[0014] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0015] In the figure: 1, workbench; 2, edge banding assembly; 21, connecting plate; 22, heat sealing strip; 23, slider; 24, pressure plate; 25, slide bar; 26, stopper; 27, spring 1;

[0016] 3. Spacing adjustment device; 31. Rotating shaft; 32. Gear; 33. Rack; 34. Locking block; 35. Rotating wheel; 36. Bolt;

[0017] 4. Driving device; 41. Driving frame; 42. Motor; 43. Guide rod; 44. Spring 2; 45. Driving shaft; 46. Cam; 47. Roller; 5. Guide rail. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] like Figures 1 to 3 As shown, a plastic bag edge sealing mechanism comprises a workbench 1, an edge sealing component 2, a spacing adjustment device 3 and a driving device 4. A guide rail 5 is provided on each side of the workbench 1, and the edge sealing component 2 is provided with two. The edge sealing component 2 comprises a connecting plate 21 and a heat sealing strip 22. Both ends of the connecting plate 21 are fixedly connected with a slider 23, and the slider 23 is slidably connected to the guide rail 5. The heat sealing strip 22 is arranged below the connecting plate 21. Each of the edge sealing components 2 is equipped with a spacing adjustment device 3, and the spacing adjustment device 3 comprises a rotating shaft 31, which is rotatably connected to the slider 23. Both ends of the rotating shaft 31 are provided with a gear 32, and the guide rail 5 is provided with a rack 33 meshing with the gear 32. The driving device 4 is used to drive the guide rail 5 to reciprocate up and down, thereby driving the heat sealing strip 22 in the edge sealing component 2 to heat and pressurize the plastic bag to achieve the edge sealing effect.

[0020] In this embodiment, a pressure plate 24 is fixedly connected to the top of the heat sealing strip 22, a slide rod 25 is fixedly connected to the pressure plate 24, the slide rod 25 is slidably connected to the connecting plate 21, and a stopper 26 is fixedly connected to the top thereof, and a spring 27 is provided on the slide rod 25 between the connecting plate 21 and the pressure plate 24.

[0021] In this embodiment, the spacing adjustment device 3 further includes a locking block 34 , which is located in a slide groove of the guide rail 5 and is locked and fixed to the slider 23 by a bolt 36 , thereby fixing the slider 23 on the guide rail 5 .

[0022] In this embodiment, rotating wheels 35 are further provided at both ends of the rotating shaft 31 , and the rotating shaft 31 is rotated by the rotating wheels 35 .

[0023] In this embodiment, the driving device 4 includes a driving frame 41 and a motor 42. A driving frame 41 is provided below the guide rail 5. A guide rod 43 is fixedly connected to the driving frame 41, and the guide rod 43 is fixedly connected to the guide rail 5. The workbench 1 is located above the driving frame 41. The guide rod 43 is slidably connected to the workbench 1. A spring 44 is sleeved on the guide rod 43 between the guide rail 5 and the workbench 1. The motor 42 is fixedly connected to the side wall of the workbench 1, and its output shaft is fixedly connected to a driving shaft 45. The driving shaft 45 is rotatably connected to the workbench 1. A notch is reserved on the driving frame 41 for the driving shaft 45 to move up and down. Two cams 46 are provided on the driving shaft 45. A roller 47 is rotatably connected to the driving frame 41, and the roller 47 is in tangential contact with the cam 46.

[0024] Working process and principle:

[0025] When the distance of the edge banding needs to be adjusted, it is only necessary to loosen the bolts and then rotate the rotating wheel 35 to drive the gear 32 to rotate through the rotating shaft 31, so that the slider 23 slides on the guide rail 5. The position of the slider 23 can be fixed by tightening the bolts again at a suitable position, thereby fixing the positions of the two edge banding assemblies 2.

[0026] During edge sealing, the plastic bag to be edge sealed passes between the heat sealing strip 22 and the workbench 1. It is intermittently conveyed by the conveying action of other equipment, and the conveying is suspended every time a certain distance is conveyed until the edge sealing operation is performed.

[0027] When edge sealing, the motor 42 drives the two cams 46 to rotate through the driving shaft 45, and presses the driving frame 41 downward through the pressing roller 47, so that the guide rail 5 moves downward under the action of the guide rod 43, and the edge sealing assembly 2 moves downward with the guide rail 5, and the spring 2 44 is compressed.

[0028] Afterwards, the guide rail 5 is driven to reset upwards under the reset action of the spring 2 44, thereby realizing the up and down reciprocating motion of the edge sealing assembly 2.

[0029] When the connecting plate 21 moves downward, the spring 27 acts on the pressing plate 24, so that the heat sealing strip 22 presses the plastic bag tightly onto the workbench 1, thereby achieving the heating and edge sealing of the plastic bag.

[0030] It is known from common technical knowledge that the invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the invention or within the scope equivalent to the invention are included in the invention.

Claims

1. A plastic bag edge sealing mechanism, characterized in that: The invention comprises a workbench (1), an edge sealing assembly (2), a spacing adjustment device (3) and a driving device (4), wherein a guide rail (5) is respectively arranged on both sides of the workbench (1), and the edge sealing assembly (2) is provided with two guide rails. The edge sealing assembly (2) comprises a connecting plate (21) and a heat sealing strip (22), and both ends of the connecting plate (21) are fixedly connected with a slider (23), and the slider (23) is slidably connected to the guide rail (5). The heat sealing strip (22) is arranged below the connecting plate (21). Each edge assembly (2) is equipped with a spacing adjustment device (3), the spacing adjustment device (3) comprising a rotating shaft (31), the rotating shaft (31) being rotatably connected to a slider (23), a gear (32) being provided at each end of the rotating shaft (31), a rack (33) being meshed with the gear (32) being provided on the guide rail (5), and the driving device (4) being used for driving the guide rail (5) to reciprocate up and down, thereby driving the heat sealing strip (22) in the edge sealing assembly (2) to heat and pressurize the plastic bag to achieve an edge sealing effect.

2. The edge sealing mechanism for a plastic bag according to claim 1, characterized in that: The top of the heat sealing strip (22) is fixedly connected to a pressing plate (24), the pressing plate (24) is fixedly connected to a sliding rod (25), the sliding rod (25) is slidably connected to the connecting plate (21), and a stopper (26) is fixedly connected to the top of the sliding rod (25), and a spring (27) is provided on the sliding rod (25) between the connecting plate (21) and the pressing plate (24).

3. The edge sealing mechanism for a plastic bag according to claim 1, characterized in that: The spacing adjustment device (3) further comprises a locking block (34), wherein the locking block (34) is located in a slide groove of the guide rail (5) and is locked and fixed to the slider (23) via a bolt (36), thereby fixing the slider (23) on the guide rail (5).

4. The edge sealing mechanism for a plastic bag according to claim 1, characterized in that: Rotating wheels (35) are also provided at both ends of the rotating shaft (31).

5. The edge sealing mechanism for a plastic bag according to claim 1, characterized in that: The driving device (4) comprises a driving frame (41) and a motor (42). A driving frame (41) is provided below each guide rail (5). A guide rod (43) is fixedly connected to the driving frame (41). The guide rod (43) is fixedly connected to the guide rail (5). The workbench (1) is located above the driving frame (41). The guide rod (43) is slidably connected to the workbench (1). A spring 2 (44) is sleeved on the guide rod (43) between the guide rail (5) and the workbench (1). The motor (42) is fixedly connected to the side wall of the workbench (1), and its output shaft is fixedly connected to a driving shaft (45). The driving shaft (45) is rotatably connected to the workbench (1). Two cams (46) are provided on the driving shaft (45). A roller (47) is rotatably connected to the driving frame (41). The roller (47) is in tangential contact with the cam (46).

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