Heat-sealing and heat-cutting mechanism of bag making machine

Abstract

The utility model discloses a heat-sealing and heat-cutting mechanism of a bag making machine. The heat-sealing and heat-cutting mechanism comprises a rack, the heat sealing mechanism is arranged on the rack; the hot cutting mechanism is arranged on the rack; the movable installation base is slidably installed on the rack, and a strip-shaped operation opening is formed in the middle of the movable installation base. The air cylinder is arranged on the rack and used for driving the movable mounting base to move repeatedly. The pressing platform is arranged on the movable mounting seat and is used for pressing to be in contact with the plastic film; according to the bag making machine, the downward pressing platform is started to make contact with the plastic film, and the heat sealing mechanism is started to penetrate through the operation opening to conduct hot pressing on the plastic film; the negative pressure adsorption assembly is started to adsorb the plastic film to the downward pressing platform, the first electric cylinder is started to drive the movable mounting base to move to the hot cutting station along with the plastic film, the situation that the position of the plastic film is prone to deviation in the conveying process is avoided, and the accuracy of the hot cutting position is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of bag making machine technology, specifically to a heat sealing and heat cutting mechanism for a bag making machine. Background Technology

[0002] A heat-sealing and heat-cutting bag-making machine is a bag-making device that combines heat-sealing and heat-cutting technologies. It is mainly used for processing plastic film bags, fusing two materials into a single unit through high-temperature heat sealing. During the bag-making process, heat sealing involves heating and fusing the edges of the plastic film to form a sealed bag edge, while heat cutting ensures precise and even cutting without damaging the material's surface.

[0003] Heat-sealing and heat-cutting bag-making machines are widely used in the processing of plastic film bags, such as vest bags and flat bags. Their characteristic is that the edges of the finished bags are both heat-sealed and cut, providing a double-safety effect. They are typically used in supermarkets and other packaging applications requiring high-quality seals.

[0004] Currently, in the process of heat sealing and heat cutting in bag making machines, heat sealing and heat cutting are carried out in two separate processes. The plastic film needs to be heat sealed and then transported to the heat cutting station for heat cutting. However, during the process of transporting the heat-sealed plastic film to the heat cutting station, the position of the plastic film is prone to shift, resulting in inaccurate heat cutting position. To address this, a heat sealing and heat cutting mechanism for bag making machines is provided. Utility Model Content

[0005] The purpose of this invention is to provide a heat sealing and heat cutting mechanism for a bag making machine, so as to solve the problem that the position of the plastic film is prone to shift during the process of conveying the heat-sealed plastic film to the heat cutting station, resulting in inaccurate heat cutting position.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-sealing and heat-cutting mechanism for a bag-making machine, comprising:

[0007] frame;

[0008] A heat sealing mechanism, mounted on the frame, is used to seal plastic films;

[0009] A hot-cutting mechanism, mounted on the frame, is used to cut the plastic film;

[0010] The movable mounting base is slidably mounted on the frame and has a strip-shaped operating port in the middle;

[0011] The first electric cylinder is mounted on the frame and is used to drive the movable mounting base to move repeatedly between the bottom of the heat cutting mechanism and the bottom of the heat sealing mechanism.

[0012] A pressing platform, mounted on the movable mounting base, is used to press down and contact the plastic film.

[0013] The negative pressure adsorption component is mounted on the movable mounting base and is used to adsorb the plastic film onto the pressure platform.

[0014] Preferably, the pressing platform includes a second electric cylinder disposed at both ends of the movable mounting base. The output end of the second electric cylinder passes through the movable mounting base and is fixedly connected to the middle of the mounting plate. A pressing plate is provided between the ends of the two mounting plates located on the same side.

[0015] Preferably, the negative pressure adsorption assembly includes an annular cavity disposed on a movable mounting base and surrounding the operating port. The movable mounting base is provided with a vacuum device communicating with the annular cavity. The bottom contact end of the pressing platform is provided with a plurality of evenly distributed suction cups. A connecting hose is provided between the suction cups and the annular cavity.

[0016] Preferably, the frame is provided with two pairs of fixed seats at the end where the heat cutting mechanism and the heat sealing mechanism are far apart from each other, and a guide rod is provided between the two fixed seats along the conveying direction of the plastic film. The movable mounting seat is provided with a guide shaft that is adapted to the guide rod.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a heat sealing and heat cutting mechanism for a bag making machine. During the heat sealing and heat cutting process, when the plastic film moves to the heat sealing station, the lower pressure platform is activated to contact the plastic film. The heat sealing mechanism then passes through the operating port to heat-press the plastic film. After the heat pressing is completed, the negative pressure adsorption component is activated to adsorb the plastic film onto the lower pressure platform. The first electric cylinder is activated to drive the moving mounting seat to move with the plastic film to the heat cutting station. The heat cutting mechanism is then activated to heat-cut the plastic film. By adsorbing the plastic film onto the bottom of the lower pressure platform, the position of the plastic film is prevented from easily shifting during the conveying process, ensuring the accuracy of the heat cutting position. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the right sectional view of the present invention;

[0020] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point A;

[0021] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point B.

[0022] In the diagram: 1. Frame; 2. Heat sealing mechanism; 3. Heat cutting mechanism; 4. Movable mounting base; 4-1. Operating port; 5. First electric cylinder; 6. Pressing platform; 6-1. Second electric cylinder; 6-2. Mounting plate; 6-3. Pressing plate; 7. Negative pressure adsorption assembly; 7-1. Annular cavity; 7-2. Vacuum equipment; 7-3. Suction cup; 7-4. Connecting hose; 8. Fixed base; 9. Guide rod; 10. Guide shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a heat sealing and heat cutting mechanism for a bag making machine, including a frame 1; a heat sealing mechanism 2 disposed on the frame 1 for sealing a plastic film; a heat cutting mechanism 3 disposed on the frame 1 for cutting the plastic film; a movable mounting base 4 slidably mounted on the frame 1, and having a strip-shaped operating port 4-1 in the middle; a first electric cylinder 5 disposed on the frame 1 for driving the movable mounting base 4 to move repeatedly between below the heat cutting mechanism 3 and below the heat sealing mechanism 2; a pressing platform 6 disposed on the movable mounting base 4 for pressing down and contacting the plastic film; and a negative pressure adsorption component 7 disposed on the movable mounting base 4 for adsorbing the plastic film. The film is adsorbed onto the pressing platform 6. During the heat sealing and heat cutting process of the bag making machine, when the plastic film moves to the heat sealing station, the pressing platform 6 is activated to contact the plastic film. The heat sealing mechanism 2 is then activated to heat-press the plastic film through the operating port 4-1. After the heat pressing is completed, the negative pressure adsorption component 7 is activated to adsorb the plastic film onto the pressing platform 6. The first electric cylinder 5 is activated to drive the moving mounting base 4 to move with the plastic film to the heat cutting station. The heat cutting mechanism 3 is then activated to heat-cut the plastic film. By adsorbing the plastic film onto the bottom of the pressing platform 6, the position of the plastic film is prevented from easily shifting during the conveying process, ensuring the accuracy of the heat cutting position.

[0025] Specifically, the pressing platform 6 includes a second electric cylinder 6-1 located at both ends of the movable mounting base 4. The output end of the second electric cylinder 6-1 passes through the movable mounting base 4 and is fixedly connected to the middle of the mounting plate 6-2. A pressing plate 6-3 is provided between the ends of the two mounting plates 6-2 on the same side. In use, by activating the two second electric cylinders 6-1, the two mounting plates 6-2 and the two pressing plates 6-3 are driven to descend simultaneously, so that the bottom of the pressing plate 6-3 contacts the plastic film for positioning, thereby realizing the descent of the pressing platform 6 and its contact with the plastic film.

[0026] Specifically, the negative pressure adsorption assembly 7 includes an annular cavity 7-1 disposed on the movable mounting base 4 and surrounding the operating port 4-1. The movable mounting base 4 is provided with a vacuum device 7-2 communicating with the annular cavity 7-1. The bottom contact end of the pressing platform 6 is provided with several evenly distributed suction cups 7-3. A connecting hose 7-4 is provided between the suction cups 7-3 and the annular cavity 7-1. After heat sealing, the suction cups 7-3 come into contact with the plastic film, and the vacuum device 7-2 is activated to extract air, creating a negative pressure in the annular cavity 7-1. The suction cups 7-3 are connected to the annular cavity 7-1 through the connecting hose 7-4, thereby generating an adsorption force between the suction cups 7-3 and the plastic film, forming a seal between the plastic film and the suction cups 7-3, thus enabling the negative pressure adsorption assembly 7 to adsorb the plastic film.

[0027] Specifically, two pairs of fixed seats 8 are provided on the frame 1 at the end where the heat cutting mechanism 3 and the heat sealing mechanism 2 are far apart from each other. There are four fixed seats 8. One pair of fixed seats is provided on the frame 1 and located on both sides of the plastic film. A guide rod 9 is provided between the two fixed seats 8 along the conveying direction of the plastic film. The two guide rods 9 are arranged in parallel. The movable mounting seat 4 is provided with a guide shaft 10 that is adapted to the guide rod 9. In use, the movable mounting seat 4 is slidably installed between the heat cutting mechanism 3 and the heat sealing mechanism 2 through the two guide rods 9. The stability of the movable mounting seat 4 during the movement is ensured by the cooperation between the guide rod 9 and the guide shaft 10.

[0028] Working principle: When this utility model is working, the pressing platform 6 is first activated to contact the plastic film, and the heat sealing mechanism 2 is activated to heat-press the plastic film through the operating port 4-1. After the heat pressing is completed, the negative pressure adsorption component 7 is activated to adsorb the plastic film onto the pressing platform 6. The first electric cylinder 5 is activated to drive the moving mounting base 4 to move with the plastic film to the heat cutting station. The heat cutting mechanism 3 is activated to heat-cut the plastic film to ensure the accuracy of the heat cutting position.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing and heat-cutting mechanism for a bag-making machine, characterized in that, include: Rack (1); A heat sealing mechanism (2) is mounted on the frame (1) and is used to seal the plastic film. A hot cutting mechanism (3) is mounted on the frame (1) and is used to cut the plastic film; The movable mounting base (4) is slidably mounted on the frame (1) and has a strip-shaped operating port (4-1) in the middle. The first electric cylinder (5) is mounted on the frame (1) and is used to drive the movable mounting base (4) to move repeatedly between the heat cutting mechanism (3) and the heat sealing mechanism (2); The pressing platform (6) is set on the movable mounting base (4) and is used to press down and contact the plastic film; The negative pressure adsorption component (7) is set on the movable mounting base (4) and is used to adsorb the plastic film onto the pressure platform (6).

2. The heat-sealing and heat-cutting mechanism of a bag-making machine according to claim 1, characterized in that: The pressing platform (6) includes a second electric cylinder (6-1) located at the front and rear ends of the movable mounting base (4). The output end of the second electric cylinder (6-1) passes through the movable mounting base (4) and is fixedly connected to the middle of the mounting plate (6-2). A pressing plate (6-3) is provided between the ends of the two mounting plates (6-2) located on the same side.

3. The heat-sealing and heat-cutting mechanism of a bag-making machine according to claim 1, characterized in that: The negative pressure adsorption assembly (7) includes an annular cavity (7-1) disposed on a movable mounting base (4) and surrounding the operating port (4-1). The movable mounting base (4) is provided with a vacuum device (7-2) communicating with the annular cavity (7-1). The bottom contact end of the pressure platform (6) is provided with a number of evenly distributed suction cups (7-3). A connecting hose (7-4) is provided between the suction cups (7-3) and the annular cavity (7-1).

4. The heat-sealing and heat-cutting mechanism of a bag-making machine according to claim 1, characterized in that: Two pairs of fixed seats (8) are provided on the frame (1) at one end away from the heat cutting mechanism (3) and the heat sealing mechanism (2). A guide rod (9) is provided between the two fixed seats (8) along the conveying direction of the plastic film. A guide shaft (10) adapted to the guide rod (9) is provided on the movable mounting seat (4).

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