Reciprocating knife sealing mechanism for fully automatic pillow packaging machine

Abstract

The utility model discloses a reciprocating knife sealing mechanism of full -automatic pillow type packaging machine, including the upper heat sealing knife seat of opposite setting, lower heat sealing knife seat, frame, gearbox and be used for driving gearbox's drive motor, the gearbox is equipped with the output shaft that stretches to both ends, and the output shaft is driven with the upper heat sealing knife seat through the connecting rod structure, the frame is equipped with transmission shaft, transmission shaft is driven with lower heat sealing knife seat through the connecting rod structure, the output shaft is driven with transmission shaft through two same transmission gear engagement. The utility model has the following beneficial effect: compact structure can effectively improve the speed of film heat sealing, and the service life is long, owing to the longer of the push rod, adopts two guide cylinders, effectively guarantees the stability of push rod axial movement.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging machines, specifically to a reciprocating knife sealing mechanism for a fully automatic pillow packaging machine. Background Technology

[0002] In the process of making product outer packaging bags, heat sealing devices are generally required to heat and pressurize plastic films or composite films to seal them and simultaneously cut the ends of the outer packaging. Currently available reciprocating packaging machinery uses the vertical reciprocating motion of upper and lower knife holders to drive the opening and closing of upper and lower heat sealing knives, achieving the cutting and sealing of the product outer packaging ends. A cam structure is generally used to drive the reciprocating motion of the upper and lower knife holders. For example, in the applicant's existing product, the upper knife holder is driven to reciprocate up and down via a linkage mechanism, while the lower knife holder rests against a cam. A spring is also installed between the lower knife holder and the frame; the combined action of the cam rotation and the spring enables the lower knife holder to reciprocate up and down. For example, patent application number 201210391587.4, patent title: "A Reciprocating Knife Sealing Mechanism Applied to Packaging Machines," uses two cam-shaped grooves to drive the upper and lower heat sealing knife holders to reciprocate. However, the cam structure has the following problems: the cam generates centrifugal force when it rotates, which limits the rotation speed and makes the film heat sealing speed relatively slow, about 50 times / minute, which cannot meet the production speed requirements of the current production line. The cam is also prone to wear and has a short lifespan. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a reciprocating knife sealing mechanism for a fully automatic pillow packaging machine, which improves the speed of film heat sealing.

[0004] The technical solution to achieve the purpose of this utility model is as follows: a reciprocating knife sealing mechanism for a fully automatic pillow packaging machine, comprising an upper heat-sealing knife holder, a lower heat-sealing knife holder, a frame, a gearbox, and a drive motor for driving the gearbox, characterized in that: the gearbox is provided with an output shaft extending to both ends, both ends of the output shaft are provided with upper cranks, the other end of the upper crank away from the output shaft is hinged to an upper connecting rod, the other end of the upper connecting rod away from the upper crank is hinged to an upper push rod, and the other end of the upper push rod away from the upper connecting rod is connected to the upper heat-sealing knife holder; the frame The device includes a drive shaft with a drive gear I and an output shaft with a drive gear II that meshes with drive gear I. Drive gear I and drive gear II are identical. Both ends of the drive shaft have lower cranks. The lower cranks are hinged to a lower connecting rod at the end furthest from the drive shaft. The lower connecting rods are hinged to a lower push rod at the end furthest from the lower cranks. The lower push rods are connected to a lower heat-sealing knife holder at the end furthest from the lower connecting rod. The frame has a guide cylinder fitted onto the upper push rod and a guide shaft. The lower heat-sealing knife holder has a sleeve fitted onto the guide shaft.

[0005] The guide cylinder is provided in two parts, the frame is provided with a first mounting plate, the lower end of the guide shaft is mounted on the first mounting plate, the top of the guide shaft is provided with a second mounting plate, one of the guide cylinders is mounted on the first mounting plate, and the other guide cylinder is mounted on the second mounting plate.

[0006] The upper crank and the upper connecting rod are connected by a first bearing, and the upper connecting rod and the upper push rod are connected by a second bearing; the lower crank and the lower connecting rod are connected by a third bearing, and the lower connecting rod and the lower push rod are connected by a fourth bearing.

[0007] The reciprocating knife sealing mechanism of this fully automatic pillow packaging machine has the following advantages: it has a compact structure, which can effectively improve the speed of film heat sealing, with less wear and a long service life. Due to the long upper push rod, two guide cylinders are used to effectively ensure the stability of the axial movement of the upper push rod. Attached Figure Description

[0008] The present invention will now be described in detail with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a schematic diagram of the right side of this utility model. Detailed Implementation

[0009] like Figures 1-3As shown, the reciprocating knife sealing mechanism of the fully automatic pillow packaging machine includes an upper heat-sealing knife holder 1, a lower heat-sealing knife holder 2, a frame 3, a gearbox 4, and a drive motor 5 for driving the gearbox 4, which are arranged opposite to each other. The gearbox 4 is provided with an output shaft 6 extending to both ends. Both ends of the output shaft 6 are provided with upper cranks 7. The other end of the upper crank 7 away from the output shaft 6 is hinged to an upper connecting rod 8. The other end of the upper connecting rod 8 away from the upper crank 7 is hinged to an upper push rod 9. The other end of the upper push rod 9 away from the upper connecting rod 8 is connected to the upper heat-sealing knife holder 1. The frame 3 is provided with a transmission shaft. 10. The transmission shaft 10 is located above the output shaft 6. The transmission shaft 10 is provided with a transmission gear I 11. The output shaft 6 is provided with a transmission gear II 12 that meshes with the transmission gear I 11. The transmission gear I 11 and the transmission gear II 12 are the same. Both ends of the transmission shaft 10 are provided with a lower crank 13. The other end of the lower crank 13 away from the transmission shaft 10 is hinged to a lower connecting rod 14. The other end of the lower connecting rod 14 away from the lower crank 13 is hinged to a lower push rod 15. The other end of the lower push rod 15 away from the lower connecting rod 14 is connected to the lower heat sealing knife holder 2. The frame 3 is provided with a first mounting plate 3.1, which has two guide shafts 3.2. A second mounting plate 3.3 is provided on the top of the two guide shafts 3.2. The lower heat-sealing knife holder 2 is provided with a sleeve 2.1 that fits onto the guide shafts 3.2. The sleeve 2.1 is connected to the lower push rod 15 through a horizontal plate 2.2. One end of the horizontal plate 2.2 is fixedly mounted on the lower push rod 15, and the other end is fixedly connected to the sleeve 2.1. The frame 3 is provided with two guide cylinders 3.4 that fit onto the upper push rod 9. One guide cylinder 3.4 is mounted on the first mounting plate 3.1, and the other guide cylinder 3.4 is mounted on the second mounting plate 3.3. The first mounting plate 3.1 is provided with a clearance hole 3.5 for avoiding the swing of the lower connecting rod 14.

[0010] The upper crank 7 and the upper connecting rod 8 are connected by a first bearing, and the upper connecting rod 8 and the upper push rod 9 are connected by a second bearing; the lower crank 13 and the lower connecting rod 14 are connected by a third bearing, and the lower connecting rod 14 and the lower push rod 15 are connected by a fourth bearing.

Claims

1. A reciprocating knife sealing mechanism for a fully automatic pillow packaging machine, comprising an upper heat-sealing knife holder, a lower heat-sealing knife holder, a frame, a gearbox, and a drive motor for driving the gearbox, characterized in that: The gearbox has an output shaft extending to both ends. Each end of the output shaft has an upper crank. An upper connecting rod is hinged to the end of the upper crank away from the output shaft. An upper push rod is hinged to the end of the upper connecting rod away from the upper crank. The end of the upper push rod away from the upper connecting rod is connected to an upper heat-sealing knife holder. The frame has a drive shaft with a drive gear I. The output shaft has a drive gear II that meshes with drive gear I. Drive gear I and drive gear II are identical. Each end of the drive shaft has a lower crank. A lower connecting rod is hinged to the end of the lower crank away from the drive shaft. A lower push rod is hinged to the end of the lower connecting rod away from the lower crank. The end of the lower push rod away from the lower connecting rod is connected to a lower heat-sealing knife holder. The frame has a guide cylinder fitted onto the upper push rod. The frame also has a guide shaft. The lower heat-sealing knife holder has a sleeve fitted onto the guide shaft.

2. The reciprocating knife sealing mechanism of the fully automatic pillow packaging machine according to claim 1, characterized in that: The guide cylinder is provided in two parts, the frame is provided with a first mounting plate, the lower end of the guide shaft is mounted on the first mounting plate, the top of the guide shaft is provided with a second mounting plate, one of the guide cylinders is mounted on the first mounting plate, and the other guide cylinder is mounted on the second mounting plate.

3. The reciprocating knife sealing mechanism of the fully automatic pillow packaging machine according to claim 1, characterized in that: The upper crank and the upper connecting rod are connected by a first bearing, and the upper connecting rod and the upper push rod are connected by a second bearing; the lower crank and the lower connecting rod are connected by a third bearing, and the lower connecting rod and the lower push rod are connected by a fourth bearing.

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