Heating structure of vacuum packaging machine

Abstract

The utility model discloses a heating structure of a vacuum packaging machine, which comprises a machine body, a hot-pressing strip is arranged on the machine body, a positioning groove is arranged on the machine body corresponding to the hot-pressing strip, the hot-pressing strip is positioned in the positioning groove, an air bag is arranged at the bottom of the positioning groove, the air bag is positioned below the hot-pressing strip, and an air nozzle of the air bag extends out of a containing cavity. The air bag is arranged below the hot-pressing strip, after the containing cavity is vacuumized, the containing cavity can be inflated by opening the air valve, then the hot-pressing strip is driven to ascend, after the containing cavity is inflated, the air bag can be flattened through the gravity of the hot-pressing strip, the structure is simple, and reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum packaging machines, and more particularly relates to a heating structure of a vacuum packaging machine. Background Art

[0002] Packaging machines are used more and more frequently in today's life, especially for vacuum packaging of bags, which can achieve good results. They mainly use a built-in vacuum pump to vacuum the bag, and after the vacuum is completed, the bag opening is heat-sealed to complete the vacuum packaging.

[0003] For example, the Chinese patent with publication number CN221394258U was previously applied for by the applicant, and discloses a vacuum packaging machine, including a body, a housing, a cover body, the cover body being used to cover the body to seal the housing, a first pump body, the first pump body being connected to the housing and being used to draw a vacuum into the housing, a hot pressing assembly, the hot pressing assembly including a control unit, a hot pressing strip and a seal, the seal and the hot pressing strip being arranged in the housing and being arranged up and down with respect to each other, the control unit being connected to the hot pressing strip and driving the hot pressing strip to move in the sealing direction so that the hot pressing strip and the seal respectively contact two sides of the packaging bag, the control unit including a second pump body and a control cylinder, the second pump body being connected to the control cylinder and being used to provide driving force to the control cylinder, and the output end of the control cylinder being connected to the hot pressing strip and being used to drive the hot pressing strip to move in the sealing direction.

[0004] In the above patented technology, the second pump body and the control cylinder of the control unit are used to move the hot pressing strip. The control unit structure occupies a large space and has a complex structure. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides an airbag arranged under the hot pressing strip. After the accommodating chamber is vacuumed, the air valve can be opened to inflate it, thereby driving the hot pressing strip to rise. After the accommodating chamber is inflated, the airbag can be flattened by the gravity of the hot pressing strip. The structure is simple and the reliability is high.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a heating structure of a vacuum packaging machine, including a machine body, a hot press strip is provided on the machine body, a positioning groove is provided on the machine body corresponding to the hot press strip, the hot press strip is located in the positioning groove, an air bag is provided at the bottom of the positioning groove, the air bag is located below the hot press strip, the air nozzle of the air bag extends out of the accommodating cavity, and the air nozzle of the air bag is connected to an air valve.

[0007] Furthermore, a limiting component is provided between the positioning groove and the hot pressing strip, and the limiting component is used to limit the movement range of the hot pressing strip.

[0008] Furthermore, the limiting component includes a guide protrusion and a guide groove, the guide protrusion is arranged at the bottom of the side of the hot pressing strip, the guide groove is arranged on the side of the positioning groove, and the top of the guide groove does not pass through the side of the positioning groove, and the guide protrusion extends into the guide groove.

[0009] Furthermore, the limiting component includes a guide protrusion and a guide groove, the guide protrusion is arranged at the top of the side of the positioning groove, the guide groove is arranged on the side of the hot pressing strip, and the guide groove does not penetrate the side of the hot pressing strip, and the guide protrusion extends into the guide groove.

[0010] Furthermore, the bottom of the heat press strip bulges upward to form a directional groove, and the airbag extends into the directional groove when it bulges.

[0011] Compared with the prior art, the beneficial effect of the present invention is: by setting the airbag, when the accommodating chamber is under normal pressure, the airbag is flattened due to the gravity of the hot pressing strip, and the hot pressing strip is in a low position. After the accommodating chamber is vacuumed, the air valve is closed, and the airbag is in a negative pressure environment, but the air valve is closed and it will not expand. When the air valve is opened, the airbag can be inflated inward through the air nozzle, lifting the hot pressing strip to achieve heat sealing. The inflation and deflation of the airbag can be controlled by only opening and closing the air valve, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional structural diagram of a vacuum packaging machine;

[0013] Figure 2 It is a cross-sectional view of a vacuum packaging machine;

[0014] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0015] Figure 4 This is a diagram of the air path of the airbag and the accommodating cavity.

[0016] Figure numerals: 1, body; 11, accommodating cavity; 13, positioning groove; 2, cover; 3, hot pressing strip; 4, sealing strip; 5, airbag; 51, air nozzle; 6, air valve; 7, air pump. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4 The embodiment of the heating structure of the vacuum packaging machine of the present invention is further described.

[0018] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0020] A heating structure of a vacuum packaging machine includes a body 1, a hot press strip 3 is provided on the body 1, a positioning groove 13 is provided on the body 1 corresponding to the hot press strip 3, the hot press strip 3 is located in the positioning groove 13, an air bag 5 is provided at the bottom of the positioning groove 13, the air bag 5 is located below the hot press strip 3, an air nozzle 51 of the air bag 5 extends out of the accommodating cavity 11, and the air nozzle 51 of the air bag 5 is connected to an air valve 6.

[0021] In this embodiment, the airbag 5 is actually in the same environment as the accommodating chamber 11, that is, after the accommodating chamber 11 is evacuated, the main body of the airbag 5 is also in a vacuum environment. When the accommodating chamber 11 is at normal pressure, the outside of the airbag 5 is at normal pressure.

[0022] When in use, first put the bag to be packaged into the accommodating chamber 11, close the cover body 2, and close the air valve 6 connected to the air nozzle 51. At this time, the airbag 5 is in an uninflated state, so that the accommodating chamber 11 is evacuated and the airbag 5 is in a vacuum environment. Then open the air valve 6, and the airbag 5 will suck air through the air nozzle 51 to inflate the airbag 5, lift the heat strip 3, move it toward the sealing strip 4, and work together with the sealing strip 4 on the cover body 2 to clamp the two sides of the packaging bag, and then power on and heat seal it. After the heat sealing is completed, the accommodating chamber 11 is depressurized, and the cover body 2 is opened. At the same time, the external pressure of the airbag 5 increases, and the airbag 5 is flattened under the action of the gravity of the heat strip 3, and the heat strip 3 drops and resets.

[0023] In this embodiment, the air valve 6 on the airbag 5 is preferably a two-position three-way valve. This air valve 6 is connected to the vacuum pump 7 of the accommodating chamber 11. When the accommodating chamber 11 is evacuated, this air valve 6 connects the airbag 5 and the vacuum pump 7, and can evacuate the airbag 5 to prevent the residual air in the airbag 5 from causing it to expand. When the vacuuming is completed and heat sealing is required, the air valve 6 is connected to the airbag 5 and the atmosphere, and the airbag 5 is inflated.

[0024] In this embodiment, a limiting component is preferably provided between the positioning groove 13 and the hot pressing strip 3 , and the limiting component is used to limit the movement range of the hot pressing strip 3 .

[0025] The limiting component includes a guide protrusion and a guide groove, wherein the guide protrusion is arranged at the bottom of the side of the hot pressing strip 3, and the guide groove is arranged on the side of the positioning groove 13, and the top of the guide groove does not pass through the side of the positioning groove 13, and the guide protrusion extends into the guide groove.

[0026] Alternatively, the limiting assembly includes a guide protrusion and a guide groove, the guide protrusion is arranged at the top of the side of the positioning groove 13, the guide groove is arranged on the side of the hot pressing strip 3, and the guide groove does not penetrate the side of the hot pressing strip 3, and the guide protrusion extends into the guide groove.

[0027] Through the action of the guide protrusion and the guide groove, the guide protrusion can only move up and down in the guide groove, that is, the range of the up and down movement of the hot pressing strip 3 is limited.

[0028] In this embodiment, the bottom of the heat press strip 3 preferably bulges upward to form an orientation groove, and the air bag 5 extends into the orientation groove when it bulges.

[0029] By setting the orientation groove, the posture position of the airbag 5 when it is inflated can be limited. Of course, the shape of the airbag 5 can be arranged according to the shape of the orientation groove, and the upper and lower surfaces of the airbag 5 can be respectively pasted to the bottom of the hot pressing strip 3 and the bottom of the positioning groove 13.

[0030] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A heating structure of a vacuum packaging machine, comprising a machine body, on which a heating strip is provided, characterized in that: A positioning groove is provided on the machine body corresponding to the hot press strip, the hot press strip is located in the positioning groove, an air bag is provided at the bottom of the positioning groove, the air bag is located below the hot press strip, the air nozzle of the air bag extends out of the accommodating cavity, and the air nozzle of the air bag is connected to an air valve.

2. The heating structure of the vacuum packaging machine according to claim 1, characterized in that: A limiting component is provided between the positioning groove and the hot pressing strip, and the limiting component is used to limit the moving range of the hot pressing strip.

3. The heating structure of the vacuum packaging machine according to claim 2, characterized in that: The limiting assembly includes a guide protrusion and a guide groove. The guide protrusion is arranged at the bottom of the side of the hot pressing strip, and the guide groove is arranged on the side of the positioning groove. The top of the guide groove does not penetrate the side of the positioning groove, and the guide protrusion extends into the guide groove.

4. The heating structure of the vacuum packaging machine according to claim 2, characterized in that: The limiting assembly includes a guide protrusion and a guide groove. The guide protrusion is arranged on the top side of the positioning groove, and the guide groove is arranged on the side of the hot pressing strip. The guide groove does not penetrate the side of the hot pressing strip, and the guide protrusion extends into the guide groove.

5. The heating structure of the vacuum packaging machine according to claim 3 or 4, characterized in that: The bottom of the heat press strip bulges upward to form a directional groove, and the air bag extends into the directional groove when it bulges.

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