Film cutting structure of vacuum skin packaging machine

Abstract

The utility model relates to the technical field of packaging equipment, in particular to a film cutting structure of a vacuum skin packaging machine, which comprises a lower die and a cutter, the lower die is provided with a plurality of vacuum chambers, a first air exhaust hole is arranged at the center of the lower die, a second air exhaust hole is arranged on one side of each vacuum chamber close to the first air exhaust hole, and the cutter is arranged on the lower die. The first air exhaust hole is communicated with the second air exhaust hole; and the cutter is used for cutting off the film on the lower die. The large air exhaust hole is connected to the vacuum pump, the large air exhaust hole is divided into the small air exhaust holes of all the vacuum chambers, during vacuumizing, the air exhaust action of all the vacuum chambers is completed through the small air exhaust holes, and a film is prevented from entering a cutter notch during air exhaust.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a film cutting structure of a vacuum skin packaging machine. Background Art

[0002] In the existing film cutting structure of the skin packaging machine type, the air extraction holes are generally in the lower die slot. However, in normal use, it is found that increasing the air extraction space has no significant improvement in the overall air extraction effect and will affect the high-barrier film after heating, that is, during the air release process in the upper vacuum chamber, the film will be sucked into the cutter slot, thus affecting the film cutting effect of the cutter. Summary of the Utility Model

[0003] The utility model solves the problems in the related art, and provides a film cutting structure of a vacuum skin packaging machine. The large air extraction hole is connected to a vacuum pump, and the large air extraction hole is branched into small air extraction holes of each vacuum chamber. When vacuumizing, the air extraction action of each vacuum chamber is completed through the small air extraction holes, avoiding the film from entering the cutter slot during air release.

[0004] To solve the above technical problems, the utility model is realized through the following technical solutions: A film cutting structure of a vacuum skin packaging machine, including a lower die and a cutter. The lower die has a plurality of vacuum chambers. A first air extraction hole is opened at the central position of the lower die. A second air extraction hole is opened on one side of each vacuum chamber close to the first air extraction hole. The first air extraction hole is communicated with the second air extraction hole; the cutter is used to cut the film on the lower die.

[0005] As a preferred solution, the first air extraction hole is connected to a vacuum pump.

[0006] As a preferred solution, the aperture of the first air extraction hole is larger than that of the second air extraction hole.

[0007] As a preferred solution, the cutter teeth of the cutter are arranged at intervals of high teeth and low teeth.

[0008] Compared with the prior art, the beneficial effects of the utility model are: The large air extraction hole of the utility model is connected to a vacuum pump, and the large air extraction hole is branched into small air extraction holes of each vacuum chamber. When vacuumizing, the air extraction action of each vacuum chamber is completed through the small air extraction holes, avoiding the film from entering the cutter slot during air release; the teeth of the cutter are structured with alternating high and low teeth, which can effectively cut special films and the film cutting flatness is higher. Brief Description of the Drawings

[0009] Figure 1 is the overall structural schematic diagram of the utility model;

[0010] Figure 2 is the structural schematic diagram of the utility model during film cutting (the first state);

[0011] Figure 3 It is a schematic structural diagram (second state) when the film is cut by the present utility model;

[0012] Figure 4 It is the front view of the lower mold of the present utility model;

[0013] Figure 5 is Figure 4 the A-A sectional view in

[0014] Figure 6 It is the top view of the lower mold of the present utility model;

[0015] Figure 7 is the present utility model Figure 6 the B-B sectional view in

[0016] Figure 8 It is the schematic structural diagram of the cutter of the present utility model;

[0017] In the figure:

[0018] 1. Lower mold, 11. First air extraction hole, 12. Vacuum chamber, 13. Second air extraction hole, 2. Cutter, 3. Film, 21. High teeth, 22. Low teeth. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary statements, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0023] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc., can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0024] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings. Therefore, it should not be construed as limiting the protection scope of the present utility model.

[0025] Such asFigures 1 to 8 As shown in the figure, a film cutting structure of a vacuum skin packaging machine includes a lower mold 1 and a cutting knife 2. The lower mold 1 has a number of vacuum chambers 12. In this embodiment, there are 4 vacuum chambers 12. A first air extraction hole 11 is provided at the center position of the lower mold 1. A second air extraction hole 13 is provided on one side of each vacuum chamber 12 close to the first air extraction hole 11. The first air extraction hole 11 is communicated with the second air extraction hole 13. Among them, the aperture of the first air extraction hole 11 is larger than that of the second air extraction hole 13. When evacuating, the first air extraction hole 11 is connected to a vacuum pump, and then the second air extraction holes 13 connected to each vacuum chamber through the first air extraction hole 11 are used to evacuate each vacuum chamber. This setting of the air extraction holes can prevent the film from being sucked into the cutting knife slot when deflating; the cutting knife 2 is used to cut the film 3 on the lower mold 1. In this embodiment, the cutting teeth of the cutting knife 2 are arranged at intervals of high teeth and low teeth. Among them, the high teeth 21 are high sharp knives, and their angles are generally below 45°. The low teeth 22 are short flat knives, and their angles are generally not less than 90°. As Figure 2 shown, when the cutting knife 2 moves towards the film 3, the high sharp knife first contacts the film 3 and preferentially completes the incision, and then as Figure 3 shown, the short flat knife cuts the remaining film that is still connected. Compared with the cutting knife with flat teeth, this cutting knife with high and low teeth can effectively cut special films, and the film cutting flatness is higher.

[0026] The above is the preferred embodiment of the present invention. Those skilled in the art of the present invention can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments. Any obvious improvements, substitutions or variations made by those skilled in the art on the basis of the present invention all belong to the protection scope of the present invention.

Claims

1. A film cutting structure of a vacuum skin packaging machine, characterized in that: It includes a lower mold (1) and a cutting knife (2). The lower mold (1) has a number of vacuum chambers (12). A first air extraction hole (11) is provided at the central position of the lower mold (1). A second air extraction hole (13) is provided on one side of each vacuum chamber (12) close to the first air extraction hole (11). The first air extraction hole (11) is communicated with the second air extraction hole (13). The cutting knife (2) is used to cut the film (3) on the lower mold (1).

2. The film cutting structure of the vacuum skin packaging machine according to claim 1, characterized in that: The first air extraction hole (11) is connected to a vacuum pump.

3. The film cutting structure of the vacuum skin packaging machine according to claim 1, characterized in that: The aperture of the first air extraction hole (11) is larger than that of the second air extraction hole (13).

4. The film cutting structure of the vacuum skin packaging machine according to claim 1, wherein: The cutter teeth of the cutting knife (2) are arranged with high teeth (21) and low teeth (22) spaced apart.

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