Hot-pressing mechanism for I-shaped bags

Abstract

This utility model belongs to the field of plastic bag production technology, specifically relating to a hot-pressing mechanism for I-beam bags, including: a main frame, and an upper hot-pressing unit and a lower hot-pressing unit disposed opposite to each other on the main frame; the upper hot-pressing unit and the lower hot-pressing unit respectively include an upper hot-pressing plate and a lower hot-pressing plate, the upper hot-pressing plate and the lower hot-pressing plate can move towards each other or away from each other along the height direction of the main frame, so as to heat-seal the bottom of the I-beam bag fitted on the lower hot-pressing plate into a flat surface. This utility model, by fitting the I-beam bag onto the fitted lower hot-pressing plate, can form inwardly folded surfaces on both sides of the bottom of the I-beam bag. Simultaneously, by utilizing the downward movement of the upper hot-pressing plate and the hot-pressing cooperation of the lower hot-pressing plate, the inwardly folded surfaces on both sides of the bottom of the I-beam bag are heat-pressed together, thereby forming a flat bottom self-standing bag, realizing the direct conversion from an I-beam bag to a flat bottom self-standing bag.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic bag production, and particularly relates to a hot pressing mechanism for I-shaped bags. Background Art

[0002] An I-shaped bag is a plastic packaging bag (usually made of PE material) commonly used in the market with a specific heat-sealed folding structure on the side. It is named because when the bag is filled with articles and stood upright, the folding lines of the bag exactly form a shape similar to the Chinese character "工" (I-shape) when viewed from the side, as Figures 4-5 shown;

[0003] A flat-bottomed stand-up pouch is a bag body with a flat bottom surface, which can stand on a tabletop through the bottom surface. Different from I-shaped bags, it generally adopts a cross crease folding method to complete the production of its bottom plane or adopts the method of embedding a cardboard at the bottom of the bag;

[0004] Therefore, if I-shaped bags or flat-bottomed stand-up pouches are to be produced at the same time, two production lines are required for manufacturing, and the cost is relatively high. In this regard, how to realize the direct conversion between I-shaped bags and flat-bottomed stand-up pouches is an urgent problem to be solved. Summary of Utility Model

[0005] To achieve the above objective, the utility model provides the following technical solution: a hot pressing mechanism for I-shaped bags, comprising: a main frame body, and an upper hot pressing unit and a lower hot pressing unit oppositely arranged on the main frame body;

[0006] The upper hot pressing unit and the lower hot pressing unit respectively comprise an upper hot pressing plate and a lower hot pressing plate, and the upper hot pressing plate and the lower hot pressing plate can move towards or away from each other along the height direction of the main frame body, so as to heat-seal the bottom of the I-shaped bag sleeved on the lower hot pressing plate into a flat surface.

[0007] As a preferred preference of the hot pressing mechanism for I-shaped bags of the utility model, the main frame body comprises a base and a support vertically connected to the base;

[0008] The lower hot pressing unit is arranged on the base, and the upper hot pressing unit is arranged on the support.

[0009] As a preferred preference of the hot pressing mechanism for I-shaped bags of the utility model, the support comprises oppositely arranged side arms and a top arm connected between the side arms, and the upper hot pressing unit is installed on the top arm opposite to the lower hot pressing unit.

[0010] As a preferred preference of the hot pressing mechanism for I-shaped bags of the utility model, the lower hot pressing unit comprises a first linear driving member vertically connected to the top of the base, and the lower hot pressing plate is vertically connected to the movable end of the first linear driving member.

[0011] As a preferred embodiment of the hot pressing mechanism for I-beam bags according to this utility model, the upper hot pressing unit includes a second linear drive member vertically connected to the top of the support, and the movable end of the second linear drive member passes through the top of the support and is vertically connected to the upper hot pressing plate.

[0012] As a preferred embodiment of the hot pressing mechanism for I-beam bags according to this utility model, the upper hot pressing unit further includes guide rods located on both sides of the second linear drive member, the ends of the guide rods vertically penetrating the top of the support and vertically connected to the upper hot pressing plate.

[0013] As a preferred embodiment of the hot pressing mechanism for I-shaped bags according to this utility model, a spacer assembly is further provided between the second linear drive member and the upper hot pressing plate;

[0014] The spacer assembly includes a connecting plate vertically connected to the movable end of the second linear drive member, and a connecting rod vertically connected between the connecting plate and the upper hot press plate.

[0015] In a preferred embodiment of the hot pressing mechanism for an I-beam bag according to this utility model, the end of the guide rod vertically penetrates the top of the support and is vertically connected to the top of the connecting plate.

[0016] As a preferred embodiment of the hot pressing mechanism for I-beam bags according to this utility model, the lower hot pressing unit further includes a bag-placement platform that is connected to the periphery of the first linear drive member and is horizontally arranged.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention creates inward-curving folded surfaces on both sides of the bottom of the I-beam bag when it is fitted onto a matching lower hot press plate. Simultaneously, the downward movement of the upper hot press plate and its hot pressing action with the lower hot press plate heat-press the inward-curving folded surfaces on both sides of the bottom of the I-beam bag together, forming a flat bottom and creating a flat stand-up pouch. This achieves a direct conversion from an I-beam bag to a flat stand-up pouch. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the I-beam bag before heat sealing at the bottom;

[0024] Figure 5 This is a schematic diagram of the structure of the I-beam bag of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the I-beam bag of this utility model, which is transformed into a flat-bottomed stand-up pouch.

[0026] In the diagram: 1. Main frame; 11. Base; 12. Support; 13. Control unit; 2. Lower hot pressing unit; 21. First linear drive component; 22. Lower hot pressing plate; 23. Bag placement platform; 3. Upper hot pressing unit; 31. Second linear drive component; 32. Upper hot pressing plate; 33. Guide rod; 34. Spacer assembly; 341. Connecting plate; 342. Connecting rod; 4. I-shaped bag; 41. First hot cover; 42. Second hot cover; 43. Third hot cover. 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] This utility model relates to a hot-pressing mechanism for I-beam bags, such as... Figures 1-3 As shown, it includes: a main frame 1, and an upper hot pressing unit 3 and a lower hot pressing unit 2 disposed opposite to each other on the main frame 1.

[0029] The main frame 1 includes a base 11 connected to the lower hot pressing unit 2, and a support 12 vertically connected to the base 11. The support 12 is in the shape of an inverted "U". It includes side arms arranged opposite each other and a top arm connected between the side arms. The upper hot pressing unit 3 is installed on the top arm opposite to the lower hot pressing unit 2 vertically connected to the top of the base 11. A control unit 13, such as a PLC controller or a micro industrial computer, is set on one side of the support 12 and can control the operation of the lower hot pressing unit 2 and the upper hot pressing unit 3.

[0030] Specifically, such as Figure 2As shown, the lower hot pressing unit 2 includes a first linear drive member 21 vertically connected to the top of the base 11, and a lower hot pressing plate 22 vertically connected to the movable end of the first linear drive member 21. The upper hot pressing unit 3 includes a second linear drive member 31 vertically connected to the top of the support 12. The movable end of the second linear drive member 31 passes through the top of the support 12 and is vertically connected to the upper hot pressing plate 32, which is parallel to the lower hot pressing plate 22. In this embodiment, the first linear drive member 21 and the second linear drive member 31 are the same and can be electric push rods, hydraulic rods, etc. In use, the I-beam bag 4 is placed on the lower hot pressing plate 22. The lower hot pressing plate 22 is generally square, and its size is adapted to the internal size of the I-beam bag 4 so that when the I-beam bag 4 is placed on the lower hot pressing plate 22, the two sides of the I-beam bag 4 form inwardly folded triangular surfaces, that is, as shown in the figure. Figure 6 The first heat-sealing cover 41, the second heat-sealing cover 42, and the third heat-sealing cover 43 shown are provided. The lower heat-pressing plate 22 can support the bottom of the I-beam bag 4 into a square plane. Through the operation of the first linear drive member 21 or the second linear drive member 31, the lower heat-pressing plate 22 and the upper heat-pressing plate 32 move towards each other to form a fit, so as to heat-seal the inwardly folded triangular facets on the bottom of the I-beam bag 4 to form a flat-bottomed stand-up pouch.

[0031] In practical use, the lower hot platen 22 is basically stationary. Therefore, to improve the stability of the upper hot platen 32, guide rods 33 are further provided on both sides of the second linear drive member 31. The ends of the guide rods 33 are vertically connected to the upper hot platen 32 through the top of the support 12 via guide seats. Through the guiding effect of the guide rods 33, the upper hot platen 32 moves more stably, thereby accurately fitting the lower hot platen 22.

[0032] Furthermore, a spacer assembly 34 is provided between the second linear drive member 31 and the upper hot press plate 32. The spacer assembly 34 includes a connecting plate 341 vertically connected to the movable end of the second linear drive member 31, and a connecting rod 342 vertically connected between the connecting plate 341 and the upper hot press plate 32. In this embodiment, the guide rod 33 can be directly connected to the connecting plate 341 or directly connected to the upper hot press plate 32. By setting the connecting rod 342, the distance between the upper hot press plate 32 and the lower hot press plate 22 can be shortened, thereby reducing the running time of the second linear drive member 31. On the one hand, this improves production efficiency, and on the other hand, the shortened running stroke of the movable end of the second linear drive member 31 also gives the second linear drive member 31 a better service life.

[0033] Furthermore, the lower hot pressing unit 2 also includes a bag placement platform 23 connected to the periphery of the first linear drive member 21 and arranged horizontally. In use, the bag placement platform 23 can stack and place I-beam bags 4 that need to be converted into flat-bottomed stand-up pouches, so as to facilitate the operator to pick up the I-beam bags 4 and further improve production efficiency.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hot press mechanism for I-beam bags, characterized by, include: The main frame (1), and the upper hot pressing unit (3) and the lower hot pressing unit (2) are disposed opposite to each other on the main frame (1); The upper hot pressing unit (3) and the lower hot pressing unit (2) respectively include an upper hot pressing plate (32) and a lower hot pressing plate (22). The upper hot pressing plate (32) and the lower hot pressing plate (22) can move towards each other or away from each other along the height direction of the main frame (1) to heat seal the bottom of the fitted I-beam bag (4) on the lower hot pressing plate (22) into a flat plane.

2. The I-beam bag hot-pressing mechanism of claim 1, wherein: The main frame (1) includes a base (11) and a support (12) vertically connected to the base (11). The lower hot pressing unit (2) is disposed on the base (11), and the upper hot pressing unit (3) is disposed on the support (12).

3. The I-beam bag hot-pressing mechanism of claim 2, wherein: The support (12) includes opposing side arms and a top arm connected between the side arms, and the upper hot pressing unit (3) is mounted on the top arm opposite to the lower hot pressing unit (2).

4. The I-beam bag hot-pressing mechanism of claim 2, wherein: The lower hot press unit (2) includes a first linear drive member (21) vertically connected to the top of the base (11), and the lower hot press plate (22) is vertically connected to the movable end of the first linear drive member (21).

5. The I-beam bag hot press mechanism of claim 4, wherein: The upper hot press unit (3) includes a second linear drive (31) vertically connected to the top of the support (12), and the movable end of the second linear drive (31) passes through the top of the support (12) and is vertically connected to the upper hot press plate (32).

6. The I-beam bag hot press mechanism of claim 5, wherein: The upper hot press unit (3) also includes guide rods (33) located on both sides of the second linear drive member (31), the ends of the guide rods (33) vertically penetrating the top of the support (12) and vertically connected to the upper hot press plate (32).

7. The I-beam bag hot-pressing mechanism of claim 6, wherein: A spacer assembly (34) is also provided between the second linear drive member (31) and the upper hot press plate (32); The spacer assembly (34) includes a connecting plate (341) vertically connected to the movable end of the second linear drive (31), and a connecting rod (342) vertically connected between the connecting plate (341) and the upper hot press plate (32).

8. The I-beam bag hot-pressing mechanism of claim 7, wherein: The end of the guide rod (33) passes vertically through the top of the support (12) and is vertically connected to the top of the connecting plate (341).

9. The hot pressing mechanism for the I-beam bag according to claim 4, characterized in that: The lower hot pressing unit (2) also includes a bag placement platform (23) that is connected to the periphery of the first linear drive member (21) and is horizontally arranged.

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