A heat sealing mechanism of a packaging machine

Abstract

This utility model discloses a heat-sealing mechanism for a packaging machine, including an upper heat-sealing plate and a lower heat-sealing plate. The upper heat-sealing plate is mounted on an upper lifting plate. A drive motor is mounted on the frame, and the drive motor drives a first drive shaft and a second drive shaft to rotate via a transmission assembly. Turntables are connected to both ends of the first and second drive shafts. The turntables are eccentrically hinged to a first transmission arm, and the other end of the first transmission arm is hinged to one end of the second transmission arm. The second transmission arm is swayably mounted on the frame, and its other end is hinged to one end of a third transmission arm. The other end of the third transmission arm is hinged to a connecting seat. Four connecting seats are correspondingly positioned at the four corners of the upper heat-sealing plate and are connected to the upper lifting plate. Guide assemblies are provided corresponding to the upper lifting plate. This utility model can achieve balanced force distribution at the four corners of the upper heat-sealing plate, ensuring that each position of the upper heat-sealing plate can stably cooperate with the lower heat-sealing plate for heat sealing.

Description

Technical Field

[0001] This utility model relates to packaging equipment, specifically to a heat sealing mechanism for a packaging machine. Background Technology

[0002] A heat-sealing mechanism is a specialized device used for heat-sealing product packaging. It is widely used in various packaging equipment. Chinese patent document (Publication No.: CN203186637U; Publication Date: September 11, 2013) discloses a heat-sealing device for a warm pack, including a mounting frame, a cam housing, a heat-sealing device, a lifting device, and a column. The heat-sealing device includes upper and lower heat-sealing plates, upper and lower heating plates, a sliding plate, and a fixing plate. The lifting device includes a cam, a splined drive shaft, rollers, roller seats, and a base plate. The rollers and roller seats are located below the cam, and the roller seats are located on the base plate. The cam housing is fixedly connected to the mounting frame. The fixing plate is connected to the cam housing via a support bracket. The column passes through the heat-sealing device, the cam housing, and the lifting device sequentially from top to bottom. Both ends of the column are fixedly connected to a pressure plate and a base plate, respectively. A spring is fitted on the column, with one end of the spring abutting against the cam housing and the other end abutting against a spring seat on the column.

[0003] The defect of the above structure is that it uses a cam and spring compression mechanism to drive the base plate, pressure plate and upper heat sealing plate to move up and down and cooperate with the lower heat sealing plate for heat sealing. During the transmission process, the base plate only cooperates with the cam in a single position to drive the base plate to move. The force on the base plate is not uniform, and the force on the pressure plate and upper heat sealing plate that are subsequently driven by the base plate is also unbalanced. As a result, when the upper heat sealing plate and the lower heat sealing plate cooperate to heat seal, local heat sealing will be incomplete, which will affect the heat sealing quality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a heat sealing mechanism for a packaging machine to solve the above-mentioned problems.

[0005] Therefore, this utility model is implemented using the following solution:

[0006] A heat-sealing mechanism for a packaging machine includes an upper heat-sealing plate and a lower heat-sealing plate arranged vertically. The upper heat-sealing plate is mounted on an upper lifting plate. A drive motor is mounted on the frame. The drive motor drives a first drive shaft and a second drive shaft to rotate via a transmission assembly. Turntables are connected to both ends of the first and second drive shafts. The turntables are eccentrically hinged to a first transmission arm. The other end of the first transmission arm is hinged to one end of a second transmission arm. The second transmission arm is swayably mounted on the frame. The other end of the second transmission arm is hinged to one end of a third transmission arm. The other end of the third transmission arm is hinged to a connecting seat. Four connecting seats are correspondingly positioned at the four corners of the upper heat-sealing plate and are connected to the upper lifting plate. Guide assemblies are provided corresponding to the upper lifting plate.

[0007] The second transmission arm is pivotally mounted on a connecting seat on the frame, and the distance between the connecting seat and the first transmission arm is greater than the distance between the connecting seat and the third transmission arm.

[0008] The transmission assembly includes a first gear and a first synchronous pulley connected to the output shaft of the drive motor. The first synchronous pulley is connected to a second synchronous pulley via a first synchronous belt. The second synchronous pulley is connected to a first drive shaft. The first gear meshes with the second gear. A third synchronous pulley is coaxially disposed on the second gear. The third synchronous pulley is connected to a fourth synchronous pulley via a second synchronous belt. The fourth synchronous pulley is connected to a second drive shaft.

[0009] The guiding assembly includes a guide sleeve disposed on the upper lifting plate, a guide post disposed on the frame passing through the guide sleeve, and a linear bearing disposed between the guide sleeve and the guide post.

[0010] The lower heat-sealing plate is mounted on the lower lifting plate, and the lower lifting plate is connected to the piston rod of the drive cylinder.

[0011] Four drive cylinders are provided, and the drive cylinders are positioned corresponding to the four corners of the lower heat sealing plate.

[0012] The heat sealing mechanism of a packaging machine described above uses a structure of turntable, linkage transmission assembly and connecting seat to realize the lifting transmission of the upper lifting plate. The connecting seat is set at the four corners of the upper heat sealing plate, so that the upper heat sealing plate is subjected to more balanced force during the heat sealing process, thereby ensuring the integrity of the heat sealing between the upper and lower heat sealing plates and further improving the heat sealing quality. Moreover, this structure places the drive mechanism of the upper lifting plate on top, making the overall assembly of the equipment more convenient. Attached Figure Description

[0013] The present invention includes the following figures:

[0014] Figure 1 This is a top-view perspective of the present invention;

[0015] Figure 2 This is a side view of the present invention. Detailed Implementation

[0016] A heat sealing mechanism for a packaging machine includes an upper heat sealing plate 30 and a lower heat sealing plate 32 arranged vertically. An upper heating plate 29 is provided corresponding to the upper heat sealing plate 30, and a lower heating plate 33 is provided corresponding to the lower heat sealing plate 32. The upper heat sealing plate 30 is mounted on an upper lifting plate 16. A drive motor 1 is mounted on a frame 2. The drive motor 1 drives a first drive shaft 5 and a second drive shaft 15 to rotate via a transmission assembly. In this embodiment, the transmission assembly includes a first gear 9 and a first synchronous pulley 8 connected to the output shaft 3 of the drive motor 1. The first synchronous pulley 8 is connected to a second synchronous pulley 6 via a first synchronous belt 7. The second synchronous pulley 6 is connected to the first drive shaft 5. The first gear 9 meshes with a second gear 10. A third synchronous pulley 11 is coaxially arranged on the second gear 10. The third synchronous pulley 11 is connected to a fourth synchronous pulley 13 via a second synchronous belt 12. The fourth synchronous pulley 13 is connected to the second drive shaft 15. Both ends of the first and second drive shafts are connected to turntables 4. Turntables 4 are eccentrically hinged to the first drive arm 18. The other end of the first drive arm 18 is hinged to one end of the second drive arm 19. The second drive arm 19 is swayably mounted on the frame. The other end of the second drive arm 19 is hinged to one end of the third drive arm 22. The other end of the third drive arm 22 is hinged to the connecting seat 23. Furthermore, the second drive arm 19 is swayably mounted on a hinge seat 21 on the frame. The distance between the hinge seat 21 and the first drive arm 18 is greater than the distance between the hinge seat 21 and the third drive arm 22, such that the second drive arm 19... The lever 9 strengthens the force at the hinged ends of the second transmission arm 19 and the third transmission arm 22, thereby ensuring that the upper heat-sealing plate 30 can press tightly against the lower heat-sealing plate for heat sealing. Four connecting seats 23 are positioned corresponding to the four corners of the upper heat-sealing plate 30 and are connected to the upper lifting plate 16. A guide assembly is provided corresponding to the upper lifting plate 16. Specifically, the guide assembly includes a guide sleeve 28 on the upper lifting plate 16, and a guide post 24 passing through the guide sleeve 28 on the frame. A linear bearing 26 is provided between the guide sleeve 28 and the guide post 24 to guide the lifting and lowering of the upper lifting plate 16. Furthermore, it should be noted that this structure, which uses transmission arms and a turntable 4 for transmission, ensures that the mechanism will not jam during transmission by reasonably setting the hinge points of the turntable and each transmission arm. This is common knowledge for those skilled in mechanical structure design, and can be adapted to different usage requirements. The specific positions will not be elaborated upon in this application. Furthermore, the lower heat-sealing plate 32 is mounted on the lower lifting plate 17, which is connected to the piston rod of the drive cylinder 31. By controlling the drive cylinder 31, the lower lifting plate 17 and the lower heat-sealing plate 32 can be raised and lowered, cooperating with the upper heat-sealing plate to perform heat-sealing processing, further improving the heat-sealing quality and meeting different heat-sealing processing requirements. Four drive cylinders 31 are provided, corresponding to the four corner positions of the lower heat-sealing plate 32, making the lifting force of the lower heat-sealing plate 32 more balanced.In addition, the structure of this application can adaptively adjust parameters such as heating temperature and time through the control unit according to different heat sealing heating requirements. This is a function that most heat sealing mechanisms on the market can achieve, so it will not be described in detail here.

[0017] The working principle of this utility model is as follows: by controlling the drive motor 1 to move, and through the gear and synchronous belt structure transmission, the first and second drive shafts are driven to rotate. The first drive shaft 5 drives the turntable 4 to rotate, and through the first transmission arm 18, the second transmission arm 19 and the third transmission arm 22, the connecting seat 23 is driven to move, and then the upper lifting plate 16 is driven to descend under the guidance of the guide column 24, so that the upper heat sealing plate 30 descends and is tightly pressed with the lower heat sealing plate 32 to perform heat sealing processing on the substrate.

[0018] This utility model's structure achieves the lifting and lowering transmission of the upper lifting plate by employing a turntable, a linkage transmission assembly, and a connecting seat. The connecting seat is positioned corresponding to the four corners of the upper heat-sealing plate, making the force on the upper heat-sealing plate more balanced during the heat-sealing process. This ensures the integrity of the heat-sealing process between the upper and lower heat-sealing plates and further improves the heat-sealing quality. Moreover, this structure places the drive mechanism of the upper lifting plate on top, making the overall assembly of the equipment more convenient.

Claims

1. A heat sealing mechanism for a packaging machine, comprising an upper heat sealing plate (30) and a lower heat sealing plate (32) arranged vertically, characterized in that... The upper heat-sealing plate (30) is set on the upper lifting plate (16), and a drive motor (1) is set on the frame (2). The drive motor (1) drives the first drive shaft (5) and the second drive shaft (15) to rotate through the transmission assembly. Both ends of the first and second drive shafts are connected to turntables (4). The turntables (4) are eccentrically hinged to the first transmission arm (18). The other end of the first transmission arm (18) is hinged to one end of the second transmission arm (19). The second transmission arm (19) is swayably set on the frame. The other end of the second transmission arm (19) is hinged to one end of the third transmission arm (22). The other end of the third transmission arm (22) is hinged to the connecting seat (23). The four connecting seats (23) are set at the four corners of the upper heat-sealing plate (30). The four connecting seats (23) are connected to the upper lifting plate (16). A guide assembly is set on the upper lifting plate (16).

2. The heat sealing mechanism of a packaging machine according to claim 1, characterized in that... The second transmission arm (19) is pivotally mounted on a hinge seat (21) on the frame, and the distance between the hinge seat (21) and the first transmission arm (18) is greater than the distance between the hinge seat (21) and the third transmission arm (22).

3. The heat sealing mechanism of a packaging machine according to claim 1, characterized in that... The transmission assembly includes a first gear (9) and a first synchronous pulley (8) connected to the output shaft (3) of the drive motor (1). The first synchronous pulley (8) is connected to a second synchronous pulley (6) via a first synchronous belt (7). The second synchronous pulley (6) is connected to a first drive shaft (5). The first gear (9) meshes with the second gear (10). A third synchronous pulley (11) is coaxially arranged on the second gear (10). The third synchronous pulley (11) is connected to a fourth synchronous pulley (13) via a second synchronous belt (12). The fourth synchronous pulley (13) is connected to a second drive shaft (15).

4. The heat sealing mechanism of a packaging machine according to claim 1, characterized in that... The guide assembly includes a guide sleeve (28) disposed on the upper lifting plate (16), a guide post (24) passing through the guide sleeve (28) is disposed on the frame, and a linear bearing (26) is disposed between the guide sleeve (28) and the guide post (24).

5. The heat sealing mechanism of a packaging machine according to claim 1, characterized in that... The lower heat-sealing plate (32) is disposed on the lower lifting plate (17), and the lower lifting plate (17) is connected to the piston rod of the drive cylinder (31).

6. The heat sealing mechanism of a packaging machine according to claim 5, characterized in that... Four drive cylinders (31) are provided, and the drive cylinders (31) are positioned corresponding to the four corners of the lower heat sealing plate (32).

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