A sealing and cutting mechanism for a packaging machine and a packaging machine

Abstract

This utility model relates to the field of packaging machine technology, and discloses a sealing and flat-cutting mechanism for a packaging machine and a packaging machine. The sealing and flat-cutting mechanism includes a horizontal sealing component and a flat-cutting component disposed below the horizontal sealing component. The flat-cutting component includes a flat-mouth cutter and a fixed cutter that open and close relative to each other, and a first driving member. After the packaging film is heat-sealed by the horizontal sealing component, it enters downward between the flat-mouth cutter and the fixed cutter. The first driving member drives the flat-mouth cutter to move towards the fixed cutter, thereby squeezing and cutting the packaging film by the fixed cutter. With this structural design, the flat-mouth cutter has a flat cutting edge, ultimately forming a parallel and smooth seal on the upper and lower packaging bags. The seal is flat and beautiful, with good sealing performance, and is suitable for various packaging films, and is easy to clean and maintain.

Description

Technical Field

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

[0002] Currently, most vertical packaging machines on the market use toothed cutters for their horizontal sealing and cutting devices. The working principle is that while a pair of left and right sealing rollers are heat-sealing, the toothed cutter in the middle of the upper and lower sections of the sealing rollers cuts the film between the upper and lower bags. The advantage of this method is that sealing and cutting are completed in one step, resulting in high efficiency.

[0003] However, toothed cutters have the following drawbacks:

[0004] 1. Poor sealing appearance: The serrated edge formed after cutting appears rough and unsightly, reducing the overall grade of the product packaging.

[0005] 2. Prone to tearing: Stress concentration at the serrated edge makes the serrated edge prone to tearing due to friction or collision during subsequent handling, transportation and sales of the packaging bag, resulting in failure of the packaging seal and moisture or deterioration of the contents.

[0006] 3. High requirements for film material: For thinner or less tough films, the toothed cutter is prone to failure or burrs, resulting in a higher scrap rate.

[0007] 4. Cleaning hard-to-reach areas: Material debris can easily remain in the grooves of the toothed blade, making it difficult to clean and posing a hygiene hazard, especially to the food and pharmaceutical industries.

[0008] Therefore, improving sealing quality, enhancing the reliability and aesthetics of packaging are important technical issues that need to be addressed. Utility Model Content

[0009] (a) Technical problems to be solved

[0010] This utility model provides a sealing and flat cutting mechanism for a packaging machine and a packaging machine. It cuts with a flat cutter, resulting in a beautiful and flat seal with high sealing performance. It is widely applicable and easy to clean and maintain.

[0011] (II) Technical Solution

[0012] To achieve the above objectives, this utility model provides the following technical solution: a sealing and flat-cutting mechanism for a packaging machine, the sealing and flat-cutting mechanism for a packaging machine includes a horizontal sealing component and a flat-cutting component disposed below the horizontal sealing component, wherein the flat-cutting component includes a flat-mouth cutter and a fixed cutter that open and close relative to each other, and a first driving member, after the packaging film is heat-sealed by the horizontal sealing component, it enters downward between the flat-mouth cutter and the fixed cutter, and the first driving member drives the flat-mouth cutter to move towards the fixed cutter to squeeze the fixed cutter and complete the compression and cutting of the packaging film.

[0013] In one possible implementation, the transverse sealing assembly includes a left sealing roller and a right sealing roller that can move relative to each other. The opposing sides of the left and right sealing rollers form a heat-sealing surface, and the heat-sealing surface is provided with a heat-sealing strip along its length for transferring heat and heat-sealing the packaging film.

[0014] In one possible implementation, heating elements are provided inside the left sealing roller and the right sealing roller.

[0015] In one possible implementation, the first driving element is a cylinder.

[0016] In one possible implementation, a film-pulling assembly is provided above the horizontal sealing assembly for pulling the packaging film downwards according to a set length, so as to send the packaging film into the horizontal sealing assembly for heat-sealing.

[0017] In one possible implementation, the film-pulling assembly includes a film-pulling wheel, a film-clamping wheel, and a second drive member that are opposite and in contact with each other, the second drive member driving the film-pulling wheel to roll so as to pull the mounting film between the film-pulling wheel and the film-clamping wheel downward.

[0018] In one possible implementation, the second driving element is a stepper motor.

[0019] To solve the above-mentioned technical problems, another technical solution provided by this utility model is: to provide a packaging machine, which includes the packaging machine sealing and flat cutting mechanism described above.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, this utility model provides a sealing and flat-cutting mechanism for a packaging machine and a packaging machine, which has the following beneficial effects:

[0022] The sealing and cutting mechanism of the packaging machine includes a horizontal sealing assembly and a flat cutting assembly located below the horizontal sealing assembly. The flat cutting assembly includes a flat cutter and a fixed cutter that open and close relative to each other, as well as a first driving component. After the packaging film is heat-sealed by the horizontal sealing assembly, it moves downwards between the flat cutter and the fixed cutter. The first driving component drives the flat cutter to move towards the fixed cutter, thereby squeezing and cutting the packaging film. This structural design, with its flat cutting edge, ultimately forms a parallel and smooth seal on the upper and lower packaging bags, resulting in a neat and aesthetically pleasing seal with excellent sealing performance. It is also suitable for various packaging films and is easy to clean and maintain. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the sealing and cutting mechanism of the packaging machine according to this utility model;

[0024] Figure 2 This is a schematic diagram of the horizontal sealing component of this utility model;

[0025] Figure 3 This is a schematic diagram of the flat-cutting component of this utility model.

[0026] In the diagram: 1. Horizontal sealing assembly; 2. Flat cutting assembly; 3. Film pulling assembly; 11. Left sealing roller; 12. Right sealing roller; 111. Heat sealing surface; 112. Heat sealing strip; 13. Heating element; 14. Left swing arm; 15. Right swing arm; 21. Flat cutter; 22. Fixed cutter; 23. First drive component; 31. Film pulling roller; 32. Film clamping roller; 33. Second drive component. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-3 This is a structural schematic diagram of the sealing and flat-cutting mechanism of the packaging machine of this utility model and its specific components. As shown in the figure, the sealing and flat-cutting mechanism of the packaging machine of this utility model includes a horizontal sealing component 1 and a flat-cutting component 2 disposed below the horizontal sealing component 1. The flat-cutting component 2 includes a flat-cutting blade 21 that opens and closes relative to each other and a fixed blade 22, as well as a first driving member 23. After the packaging film is heat-sealed by the horizontal sealing component 1, it enters downward between the flat-cutting blade 21 and the fixed blade 22. The first driving member 23 drives the flat-cutting blade 21 to move towards the fixed blade 22 to squeeze the fixed blade 22 and complete the compression and cutting of the packaging film.

[0029] In a specific implementation, the first driving component 23 is a driving cylinder.

[0030] With this structural design, under the thrust of the first driving component, the flat-edged cutter first contacts the packaging film. Through powerful mechanical pressure, the cutter is squeezed and fixed, instantly completing the extrusion and cutting of the film. During the extrusion process, because the cutter has a straight blade with a flat edge, two parallel, smooth sealing lines are ultimately formed on the upper and lower packaging bags, completely cutting the film in the middle and separating it into two independent packaging bags. The upper and lower sealing edges of the packaging bags are smooth straight lines, resulting in a very neat and high-end appearance, greatly enhancing the overall visual effect and brand image of the product packaging.

[0031] Moreover, the smooth sealing edge eliminates the stress concentration points inherent in serrated seals, resulting in higher mechanical strength at the seal and minimizing tearing and leakage in subsequent processes, effectively ensuring the shelf life and safety of the contents.

[0032] The flat blade is more adaptable to various packaging film materials (especially thin and composite films), and the cutting surface is clean and burr-free, which effectively reduces the scrap rate caused by incomplete cutting. The flat blade surface has a simple structure with no dead corners, making it very easy to clean and meeting the high hygiene standards of the food and pharmaceutical industries.

[0033] In one possible implementation, the horizontal sealing assembly 11 includes a left sealing roller 11 and a right sealing roller 12 that can move relative to each other. The two opposing sides of the left sealing roller 11 and the right sealing roller 12 form a heat sealing surface 111. The heat sealing surface 111 is provided with a heat sealing strip 112 along its length direction for transferring heat and heat sealing the packaging film.

[0034] Heating elements 13 are provided inside the left sealing roller 11 and the right sealing roller 12. The heating elements provide heat, and the temperature of the heating elements can be controlled and adjusted by the control system to adapt to the sealing requirements of packaging films of different materials.

[0035] Among them, the left sealing roller 11 and the right sealing roller 12 can move towards each other. In specific implementation, the left swing arm 14 and the right swing arm 15 can be driven to move synchronously through a drive device (not shown in the figure). Thus, the left swing arm drives the left sealing roller to move to the right, and the right swing arm drives the right sealing roller to move to the left, so as to achieve the closing effect of the two. During the closing process, the heat provided by the heating element and the strong mechanical pressure of the left and right sealing rollers instantly complete the heat-melting seal of the packaging film.

[0036] In one possible implementation, in order to facilitate the automatic entry of the packaging film into the horizontal sealing component and the flat cutting component, a film pulling component 3 is provided above the horizontal sealing component 1 to pull the packaging film down according to a set length so as to send the packaging film into the horizontal sealing component 1 for heat sealing.

[0037] The film-pulling assembly 3 includes a film-pulling wheel 31, a film-clamping wheel 32, and a second driving member 33 that are opposite to and in contact with each other. The second driving member 33 drives the film-pulling wheel 31 to roll so as to pull the installation film between the film-pulling wheel 31 and the film-clamping wheel 32 downward.

[0038] In practice, the second driving component 33 is a stepper motor.

[0039] During operation, the packaging film is positioned between the film-pulling roller and the film-clamping roller. A stepper motor drives the film-pulling roller to pull the film downwards to a set length. When the film reaches the sealing position between the left and right sealing rollers, the drive unit simultaneously pushes the left sealing roller to the right and the right sealing roller to the left, achieving a combined effect. During the closing process, the heat provided by the heating element and the strong mechanical force of the left and right sealing rollers complete the heat-melt seal of the packaging film. Upon completion of the seal, the left and right sealing rollers separate to await the next packaging film. The sealed packaging film continues downwards into the flat-cutting assembly. Under the thrust of the drive cylinder, the flat-cutting blade first contacts the packaging film, squeezing and fixing the blade under strong mechanical pressure, instantly completing the extrusion and cutting of the packaging film. During the extrusion process, because the flat-cutting blade has a straight, flat cutting edge, it ultimately forms two parallel, smooth seals on the upper and lower packaging bags, completely cutting the film in between and separating it into two independent packaging bags.

[0040] It should be noted that, in the flat cutting mechanism of this utility model, for the sake of convenience in displaying the main structure of the flat cutting mechanism, the mounting seats used to support or install various components have been omitted, but this does not affect the realization of the overall structural function of this application. Moreover, in order to achieve automation of the flat cutting mechanism, the flat cutting mechanism of this application can also be connected to a control system, so that the control system can control the flat cutting mechanism to automatically complete the automatic sealing and cutting of the packaging film.

[0041] Based on the sealing and flat-cutting mechanism of the packaging machine provided above, this utility model further provides a packaging machine that includes the sealing and flat-cutting mechanism described above.

[0042] The above detailed description of the sealing and cutting mechanism of the packaging machine and the packaging machine, in conjunction with the accompanying drawings, indicates that the sealing and cutting mechanism of this utility model includes a horizontal sealing assembly and a cutting assembly disposed below the horizontal sealing assembly. The cutting assembly includes a flat cutter that opens and closes relative to each other, a fixed cutter, and a first driving member. After the packaging film is heat-sealed by the horizontal sealing assembly, it moves downwards between the flat cutter and the fixed cutter. The first driving member drives the flat cutter to move towards the fixed cutter, thereby squeezing and cutting the packaging film by the fixed cutter. Through this structural design, the flat cutter has a flat cutting edge, ultimately forming a parallel and smooth seal on the upper and lower packaging bags. The seal is flat and aesthetically pleasing, with good sealing performance, and is suitable for various packaging films, making it easy to clean and maintain.

[0043] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packaging machine sealing and flat cutting mechanism, characterized in that, The packaging machine sealing and cutting mechanism includes a horizontal sealing assembly and a flat cutting assembly disposed below the horizontal sealing assembly. The flat cutting assembly includes a flat cutter and a fixed cutter that open and close relative to each other, as well as a first driving member. After the packaging film is heat-sealed by the horizontal sealing assembly, it moves downward between the flat cutter and the fixed cutter. The first driving member drives the flat cutter to move towards the fixed cutter to squeeze the fixed cutter and complete the compression and cutting of the packaging film.

2. The packaging machine seal-flap cutting mechanism of claim 1, wherein, The horizontal sealing assembly includes a left sealing roller and a right sealing roller that can move relative to each other. The two opposing sides of the left sealing roller and the right sealing roller form a heat sealing surface. The heat sealing surface is provided with a heat sealing strip along its length to transfer heat and heat seal the packaging film.

3. The packaging machine seal-flap cutting mechanism of claim 2, wherein, Heating elements are provided inside the left sealing roller and the right sealing roller.

4. The packaging machine seal-flap cutting mechanism of claim 1, wherein, The first driving component is a cylinder.

5. The packaging machine seal-flap cutting mechanism of claim 1, wherein, A film-pulling assembly is provided above the horizontal sealing assembly, which is used to pull the packaging film downwards according to a set length so as to send the packaging film into the horizontal sealing assembly for heat sealing.

6. The packaging machine seal-flap cutting mechanism of claim 5, wherein, The film-pulling assembly includes a film-pulling wheel, a film-clamping wheel, and a second driving member that are opposite to and in contact with each other. The second driving member drives the film-pulling wheel to roll so as to pull the mounting film between the film-pulling wheel and the film-clamping wheel downward.

7. The packaging machine seal-flap cutting mechanism of claim 6, wherein, The second driving component is a stepper motor.

8. A packaging machine characterized in that, The packaging machine includes the sealing and flat cutting mechanism described in any one of claims 1-7.

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