Transverse sealing mechanism of bag making machine

Abstract

The utility model discloses a transverse sealing mechanism of a bag making machine, which comprises a mounting bracket arranged on a rack of the bag making machine, and an upper transverse sealing device and a lower transverse sealing device which are oppositely arranged on the mounting bracket, the upper transverse sealing device comprises an upper cutter box assembly arranged on the mounting support in a sliding mode and an upper heat sealing assembly connected to the upper cutter box assembly, and the mounting support is provided with a first servo motor connected to the upper cutter box assembly in a driving mode. The lower transverse sealing device comprises a lower cutter box assembly arranged on the installation support in a sliding mode and a lower heat sealing assembly connected to the lower cutter box assembly, and the installation support is provided with a second servo motor connected to the lower cutter box assembly in a driving mode. According to the utility model, the structure is compact, the upper transverse sealing device and the lower transverse sealing device are respectively driven by the servo motor, the distance between the upper transverse sealing device and the lower transverse sealing device is increased, and the influence of the upper heat sealing assembly and the lower heat sealing assembly on packaging bags / film materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a transverse sealing mechanism of a bag making machine. Background Art

[0002] A bag-making machine is a machine used to make various packaging bags. The hot-sealing step is an essential step in the current bag-making process, and the hot-sealing process requires the bag-making machine to have at least hot-sealing equipment. In existing bag-making machine hot-sealing equipment, some horizontal sealing and pressing devices are driven by cylinders, which can easily lead to unstable sealing pressure during the horizontal sealing process, potentially causing quality differences in the hot-sealing of the packaging bags. Other devices use cam-driven hot-sealing devices, which have a limited reciprocating travel. Even when not in hot-sealing operation, the hot-sealing equipment is too close to the film material or packaging bag, causing thermal deformation of the film material or packaging bag. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of the present utility model is to provide a transverse sealing mechanism for a bag making machine to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A transverse sealing mechanism of a bag-making machine comprises a mounting bracket arranged on a bag-making machine frame, an upper transverse sealing device and a lower transverse sealing device arranged relatively to the mounting bracket, and a first drive device and a second drive device respectively connected to the upper transverse sealing device and the lower transverse sealing device, the upper transverse sealing device comprising an upper knife box assembly slidably arranged on the mounting bracket and an upper heat-sealing assembly connected to the upper knife box assembly, the first drive device comprising a first servo motor drivingly connected to the upper knife box assembly, the lower transverse sealing device comprising a lower knife box assembly slidably arranged on the mounting bracket and a lower heat-sealing assembly fixed to the lower knife box assembly, and the second drive device comprising a second servo motor drivingly connected to the lower knife box assembly.

[0006] Furthermore, in the transverse sealing mechanism of the above-mentioned bag-making machine, the first servo motor is installed on the mounting bracket through the first motor seat, and is driven and connected to the upper knife box assembly through the first screw pair; the screw of the first screw pair is rotatably connected to the mounting bracket through the first bearing seat, and is connected to the output shaft of the first servo motor, and the nut of the first screw pair is arranged on the upper knife box assembly.

[0007] Furthermore, in the transverse sealing mechanism of the bag making machine, both ends of the upper knife box assembly are slidably connected to the mounting bracket via first guide rails.

[0008] Furthermore, in the transverse sealing mechanism of the bag making machine, the upper heat sealing assembly includes a mounting seat and an upper sealing knife fixed to each other, and the mounting seat is connected to the upper knife box assembly through a connecting rod.

[0009] Furthermore, in the transverse sealing mechanism of the above-mentioned bag-making machine, one end of the connecting rod protrudes with a limiting boss and is embedded in the mounting seat, and the other end slides through the upper knife box assembly. The upper knife box assembly is provided with a linear bearing corresponding to the connecting rod, and the end of the connecting rod close to the linear bearing is processed with an external thread and is connected to an adjusting nut.

[0010] Furthermore, in the transverse sealing mechanism of the bag making machine, a spring is provided between the upper knife box assembly and the upper heat sealing assembly.

[0011] Furthermore, in the transverse sealing mechanism of the above-mentioned bag-making machine, the second servo motor is installed on the mounting bracket through the second motor seat, and is driven and connected to the lower knife box assembly through the second screw pair and the third screw pair; the screw of the second screw pair is rotatably connected to the mounting bracket through the second bearing seat, and is connected to the output shaft of the second servo motor, the nut of the second screw pair is arranged on the upper knife box assembly, and the screw of the third screw pair is rotatably connected to the mounting bracket through the third bearing seat, and is connected to the output shaft of the second servo motor through a synchronous belt.

[0012] Furthermore, in the transverse sealing mechanism of the bag making machine, both ends of the lower knife box assembly are slidably connected to the mounting bracket via second guide rails.

[0013] Furthermore, the transverse sealing mechanism of the bag making machine further includes two sets of cloth ironing installation mechanisms arranged on both sides of the installation bracket, and the two sets of cloth ironing installation mechanisms are respectively arranged corresponding to the upper heat sealing component and the lower heat sealing component.

[0014] Furthermore, in the transverse sealing mechanism of the above-mentioned bag-making machine, the ironing cloth installation mechanism includes two rotating shafts and two steering shafts that are rotatably arranged on both sides of the installation bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model has a compact structure. The upper transverse sealing device and the lower transverse sealing device are respectively driven by servo motors, which increases the distance between the upper transverse sealing device and the lower transverse sealing device, and reduces the influence of the upper heat sealing component and the lower heat sealing component on the packaging bag / film material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the transverse sealing mechanism of the bag making machine in a specific embodiment of the present utility model.

[0018] Figure 2 It is a structural schematic diagram of the upper transverse sealing device in a specific embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram of the connection between the mounting base and the connecting rod in a specific embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the lower horizontal sealing device in a specific embodiment of the present utility model.

[0021] Figure 5 It is a structural schematic diagram of the ironing cloth installation mechanism in a specific embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figures 1 to 5 As shown, a transverse sealing mechanism of a bag making machine includes a mounting bracket 1 arranged on a bag making machine frame and an upper transverse sealing device and a lower transverse sealing device arranged relative to the mounting bracket 1, the upper transverse sealing device includes an upper knife box assembly 2 slidably arranged on the mounting bracket 1 and an upper heat sealing assembly 3 connected to the upper knife box assembly 2, the mounting bracket 1 is provided with a first servo motor as a first driving device 4, and drives the connection to the upper knife box assembly 2. The lower transverse sealing device includes a lower knife box assembly 5 slidably arranged on the mounting bracket 1 and a lower heat sealing assembly 6 fixed to the lower knife box assembly 5, the mounting bracket 1 is provided with a second servo motor as a second driving device 7, and drives the connection to the lower knife box assembly 5.

[0024] In this technical solution, the mounting bracket is a frame structure, which can be set up separately and then vertically installed on the frame of the bag making machine, or it can be integrated with the frame of the bag making machine. The transverse sealing mechanism is installed on the hot pressing process of the bag making machine through the mounting bracket to complete the transverse sealing and hot pressing of the packaging bag. The upper heat sealing component and the lower heat sealing component are both set horizontally, and the upper heat sealing component is set just above the lower heat sealing component. After the part of the film material or packaging bag that needs to be heat sealed and hot pressed is sent between the upper transverse sealing device and the lower transverse sealing device by the bag making machine, the first servo motor and the second servo motor are started, and the upper knife box component and the lower knife box component are respectively driven to move the film material or the packaging bag to the upper transverse sealing device and the lower transverse sealing device. The upper heat sealing assembly and the lower heat sealing assembly move relative to each other and act on the surface of the film material or packaging bag to complete heat sealing and hot pressing. After the heat sealing and hot pressing is completed, the first servo motor and the second servo motor rotate in opposite directions, and respectively drive the upper heat sealing assembly and the lower heat sealing assembly away from the film material and packaging bag through the upper knife box assembly and the lower knife box assembly. Compared with transmission structures such as cams, the travel range of the upper heat sealing assembly and the lower heat sealing assembly is increased, that is, the distance between the upper heat sealing assembly and the lower heat sealing assembly and the film material or packaging bag is increased, and the influence of the upper heat sealing assembly and the lower heat sealing assembly on the moving or non-hot pressing part of the film material / packaging bag is reduced.

[0025] For example, see Figure 1 and Figure 2 As shown, the first servo motor (not shown) is installed on the mounting bracket 1 through the first motor seat 41, and is driven and connected to the upper knife box assembly 2 through the first screw pair 42; the screw of the first screw pair 42 is rotatably connected to the mounting bracket 1 through the first bearing seat 43, and is connected to the output shaft of the first servo motor, and the nut of the first screw pair 42 is set on the upper knife box assembly 2.

[0026] In this technical solution, the upper knife box assembly includes a top plate, two side plates and two end plates, and forms a cavity with an opening at the lower end. The first motor seat is a conventional structure and is installed on the top of the mounting bracket by conventional bolts, etc. The first servo motor uses an existing servo motor and is installed on the top of the first motor seat by conventional devices such as bolts, and its output shaft is connected to the corresponding end of the screw in the first screw pair through a coupling. The first bearing seat is an existing structure and is fixed to the top plate by bolts, etc. Two bearing groups consisting of deep groove ball bearings and thrust ball bearings are respectively provided at both ends of its interior. The end of the screw in the first screw pair close to the coupling is axially limited to the corresponding bearing group by conventional devices such as locking nuts, and the other end is axially limited to the corresponding bearing group by structures such as its own shaft shoulders. The first bearing seat and the bearing group therein enable the screw of the first screw pair to be rotatably connected to the mounting bracket, thereby driving the upper knife box assembly and the upper heat sealing assembly to rise and fall through the nut of the first screw pair.

[0027] For example, see Figure 1 and Figure 2 As shown, both ends of the upper knife box assembly 2 are slidably connected to the mounting bracket 1 through the first guide rails 8 respectively.

[0028] In this technical solution, the first guide rail uses a conventional linear guide rail and is installed on the corresponding inner wall of the mounting bracket by bolts, etc. The outer walls of the two end plates are respectively connected to the slider of the first guide rail by conventional bolts, etc., thereby improving the accuracy and stability of the lifting and lowering of the upper knife box assembly.

[0029] For example, see Figures 1 to 3 As shown, the upper heat sealing assembly 3 includes a mounting base 31 and an upper sealing knife 32 fixed to each other, and the mounting base 31 is connected to the upper knife box assembly 2 through two symmetrically arranged connecting rods 33.

[0030] In this technical solution, the upper sealing knife is a conventional structure, including a heating plate, an insulation plate and a hot knife, etc., and is arranged on the side of the mounting seat close to the film material / packaging bag through conventional bolts, etc. The top end of the mounting seat slides in the cavity of the upper knife box assembly and is connected to the top plate through a connecting rod. The two connecting rods are symmetrically arranged on both sides of the first screw pair to ensure the stability of the mounting seat connection.

[0031] For example, see Figures 1 to 3 As shown, one end of the connecting rod 33 protrudes from a limiting boss 331 and is embedded in the mounting seat 31, and the other end slides through the top plate of the upper knife box assembly 2. The upper knife box assembly 2 is provided with a linear bearing 34 corresponding to the connecting rod 33. The end of the connecting rod 33 close to the linear bearing 34 is processed with an external thread and is connected to an adjusting nut 35.

[0032] In this technical solution, a connecting hole corresponding to the connecting rod is processed in the mounting seat, and a limiting groove corresponding to the limiting boss is provided at the bottom of the inner wall of the connecting hole (close to the end of the upper sealing knife). The outer wall of the connecting rod between the linear bearing and the mounting seat is processed with an external thread, and the connecting rod is axially fixed to the mounting seat by the cooperation of the fixing nut 36 and the limiting boss. The linear bearing uses a conventional bearing seat and oil-containing bearing, etc., and is fixed to the top plate by conventional bolts. The connecting rod is slidably arranged in the linear bearing. The installation height of the connecting rod is adjusted by adjusting the nut, thereby adjusting the height of the two ends of the upper heat sealing assembly to ensure the parallelism between the upper heat sealing assembly and the lower heat sealing assembly. To prevent the connecting rod from rotating, the inner wall of the limiting groove and the outer wall of the limiting boss are processed with anti-rotation planes.

[0033] For example, see Figure 2 As shown, a spring (not shown) is provided between the upper knife box assembly 2 and the upper heat sealing assembly 3 .

[0034] In this technical solution, a T-shaped positioning column is provided on the bottom surface of the top plate through bolts, and a positioning groove is provided on the top surface of the mounting seat. A conventional rectangular coil spring is selected as the spring, and both ends are respectively sleeved on the T-shaped positioning column and embedded in the positioning groove to prevent the spring from falling off or tilting. The two springs are symmetrically arranged on both sides of the first screw pair. When the upper knife box assembly descends, the upper heat sealing assembly is pressed down by the two springs, and the upper heat sealing assembly is in elastic contact with the film material / packaging bag to protect the film material / packaging bag.

[0035] For example, see Figure 1 and Figure 4 As shown, the second servo motor (not shown) is mounted on the mounting bracket 1 through the second motor seat 71, and is driven and connected to the lower knife box assembly 5 through the second screw pair 72 and the third screw pair 73; the screw of the second screw pair 72 is rotatably connected to the mounting bracket 1 through the second bearing seat 74, and is connected to the output shaft of the second servo motor, the nut of the second screw pair 72 is set on the upper knife box assembly 2, and the screw of the third screw pair 73 is rotatably connected to the mounting bracket 1 through the third bearing seat 75, and is connected to the output shaft of the second servo motor through a synchronous belt.

[0036] In this technical solution, the second motor seat is a conventional structure and is installed on the mounting bracket by conventional bolts, etc. The second servo motor uses an existing servo motor and is installed on the bottom end of the second motor seat by conventional devices such as bolts, and its output shaft is connected to the corresponding end of the screw in the second screw pair through a coupling. The structure of the lower horizontal sealing device can be the same as that of the upper horizontal sealing device, or the lower heat sealing assembly can be directly fixed to the top of the lower knife box assembly. The structure of the second bearing seat and the third bearing seat is the same as that of the first bearing seat, and are respectively fixed to the bottom end of the lower knife box assembly by conventional mounting plates and bolts. The second screw pair and the third screw pair have the same structure as the first screw pair, and are respectively provided with synchronous wheels by conventional tensioning sleeves, etc. The two synchronous wheels are connected by a synchronous belt, thereby synchronously driving the first screw pair and the second screw pair to move, driving the lower knife box assembly and the lower heat sealing assembly to rise and fall. The lower heat sealing assembly is a conventional structure, including a heating plate, an insulation plate and a hot knife.

[0037] For example, see Figure 1 and Figure 4 As shown, both ends of the lower knife box assembly 5 are slidably connected to the mounting bracket 1 through the second guide rails 9 respectively.

[0038] In this technical solution, the second guide rail uses a conventional linear guide rail and is installed on the corresponding inner wall of the mounting bracket by bolts, etc. The outer walls at both ends of the lower knife box assembly are respectively connected to the slider of the second guide rail by conventional bolts, etc., thereby improving the accuracy and stability of the lifting and lowering of the lower knife box assembly.

[0039] For example, see Figure 1 and Figure 5As shown, it also includes two sets of cloth ironing installation mechanisms 10 arranged on both sides of the installation bracket 1, and the two sets of cloth ironing installation mechanisms 10 are respectively arranged corresponding to the upper heat sealing component 3 and the lower heat sealing component 6.

[0040] In this technical solution, the ironing cloth is set on the mounting bracket through the ironing cloth mounting mechanism and does not move with the upper horizontal sealing device and the lower horizontal sealing device. The ironing knife contacts the ironing cloth only during the ironing and pressing operation. During the intervals of the ironing and pressing operation, after the upper horizontal sealing device and the lower horizontal sealing device move and reset, the ironing knife and the ironing cloth do not contact, thereby avoiding the ironing cloth from being in a high temperature state for a long time, thereby extending its service life.

[0041] For example, see Figure 1 and Figure 5 As shown, the ironing cloth installation mechanism 10 includes two rotating shafts 101 and two steering shafts 102 rotatably arranged on both sides of the installation bracket 1 respectively.

[0042] In this technical solution, both ends of the rotating shaft and the steering shaft are respectively installed on the side surfaces of the mounting bracket through mounting blocks, wherein the rotating shaft is a hexagonal rod structure, and both ends are rotatably set on the corresponding mounting blocks through conventional clearance fit or shaft sleeves or bearings. One end of the rotating shaft is connected with a conventional cross handle for convenient handheld operation. One end of the ironing cloth is wound on one rotating shaft, and the other end is wound on another rotating shaft after passing through two steering shafts in sequence, so that the ironing cloth is set below the upper horizontal sealing device or above the lower horizontal sealing device. A gap is left between the two ironing cloths to accommodate the passage of film materials / packaging bags. The position of the ironing cloth can be rotated by rotating the two rotating shafts in the same direction, which is convenient for operation.

[0043] To sum up, the utility model has a compact structure, and the upper horizontal sealing device and the lower horizontal sealing device are respectively driven by servo motors, which increases the distance between the upper horizontal sealing device and the lower horizontal sealing device, and reduces the impact of the upper heat sealing component and the lower heat sealing component on the packaging bag / film material.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0045] The above is only a specific implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A transverse sealing mechanism of a bag making machine, characterized by: It includes a mounting bracket arranged on a bag making machine frame, an upper transverse sealing device and a lower transverse sealing device arranged relatively to the mounting bracket, and a first drive device and a second drive device respectively connected to the upper transverse sealing device and the lower transverse sealing device, the upper transverse sealing device includes an upper knife box assembly slidably arranged on the mounting bracket and an upper heat-sealing assembly connected to the upper knife box assembly, the first drive device includes a first servo motor driving the connection to the upper knife box assembly, the lower transverse sealing device includes a lower knife box assembly slidably arranged on the mounting bracket and a lower heat-sealing assembly fixed to the lower knife box assembly, and the second drive device includes a second servo motor driving the connection to the lower knife box assembly.

2. The transverse sealing mechanism of a bag making machine according to claim 1, characterized in that: The first servo motor is mounted on the mounting bracket via a first motor seat and is driven and connected to the upper knife box assembly via a first lead screw pair; The lead screw of the first lead screw pair is rotatably connected to the mounting bracket through a first bearing seat and is connected to the output shaft of the first servo motor. The nut of the first lead screw pair is arranged on the upper knife box assembly.

3. The transverse sealing mechanism of a bag making machine according to claim 2, characterized in that: Both ends of the upper knife box assembly are slidably connected to the mounting bracket via first guide rails.

4. The transverse sealing mechanism of a bag making machine according to claim 1, characterized in that: The upper heat sealing assembly comprises a mounting seat and an upper sealing knife fixed to each other, and the mounting seat is connected to the upper knife box assembly through a connecting rod.

5. The transverse sealing mechanism of a bag making machine according to claim 4, characterized in that: One end of the connecting rod protrudes from a limiting boss and is embedded in the mounting seat, and the other end slides through the upper knife box assembly. The upper knife box assembly is provided with a linear bearing corresponding to the connecting rod. The end of the connecting rod close to the linear bearing is processed with an external thread and is connected to an adjusting nut.

6. The transverse sealing mechanism of a bag making machine according to claim 1, characterized in that: A spring is provided between the upper knife box assembly and the upper heat sealing assembly.

7. The transverse sealing mechanism of a bag making machine according to claim 1, characterized in that: The second servo motor is mounted on the mounting bracket via a second motor seat, and is driven and connected to the lower knife box assembly via a second screw pair and a third screw pair; The screw of the second screw pair is rotatably connected to the mounting bracket through a second bearing seat, and is connected to the output shaft of the second servo motor. The nut of the second screw pair is arranged on the upper knife box assembly. The screw of the third screw pair is rotatably connected to the mounting bracket through a third bearing seat, and is connected to the output shaft of the second servo motor through a synchronous belt.

8. The transverse sealing mechanism of a bag making machine according to claim 7, characterized in that: Both ends of the lower knife box assembly are slidably connected to the mounting bracket via second guide rails.

9. The transverse sealing mechanism of a bag making machine according to claim 1, characterized in that: It also includes two sets of cloth ironing installation mechanisms arranged on both sides of the installation bracket, and the two sets of cloth ironing installation mechanisms are respectively arranged corresponding to the upper heat sealing component and the lower heat sealing component.

10. The transverse sealing mechanism of a bag making machine according to claim 9, characterized in that: The ironing cloth installation mechanism comprises two rotating shafts and two steering shafts which are rotatably arranged on both sides of the installation bracket.

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