Sealing machine with improved sealing pressing strip structure

Abstract

The utility model discloses a sealing machine with an improved sealing pressing strip structure, an upper machine body or a lower machine body is provided with a frame strip integrally formed by metal materials, the frame strip is used for fastening and installing a rubber strip, the cross section of the frame strip in the length direction is U-shaped, and the frame strip comprises a back plate and two side edges formed by bending, an included angle a is formed between each side edge and the back plate, the included angle a ranges from 80 degrees to 89 degrees, and the back plate and the two side edges form a clamping cavity in a half-surrounding mode; a fastening connecting part is formed in the center line position of the top face of the rubber strip, the width of the fastening connecting part is smaller than that of the rubber strip, so that the inverted-T-shaped rubber strip is formed, the two sides of the rubber strip are each provided with a limiting shoulder, the assembling part is embedded into the clamping cavity, and the side edges of the two sides are connected with the fastening connecting part in a matched and clamped mode. The edges of the two side edges abut against the corresponding limiting shoulders respectively. Compared with the prior art, the assembly difficulty of the rubber strip can be simplified, and the assembly stability of the rubber strip is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sealing machines, in particular to a sealing machine with an improved sealing strip structure. Background Art

[0002] A vacuum sealing machine is a machine used for packaging and sealing. Its main function is to pump out the air in the bag after putting food into the packaging bag, and complete the sealing process after reaching the predetermined vacuum degree, which is applicable to various foods, meat products, etc.

[0003] Common vacuum sealing machines generally include an upper body and a lower body rotatably connected by a hinge. Rubber strips and heating strips are respectively provided on the covering and mating surfaces of the upper body and the lower body to press the bag mouth of the packaging bag, so as to perform vacuum pumping and heat sealing treatments. Among them, the strip is mostly assembled and positioned by a metal frame strip. After the rubber strip is embedded in the frame strip, it is fixed by bolts or a倒扣 structure. Although the rubber strip in this sealing strip structure is assembled by a multi-point fastening method, after long-term use, the rubber strip will still partially fall off, and even the connection points will be torn. The assembly strength of the rubber strip is low; in addition, the assembly method of multi-point fastening is relatively cumbersome and is not conducive to shortening the assembly cycle of the whole machine. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a sealing machine with an improved sealing strip structure, which realizes the clamping assembly between the rubber strip and the frame strip. The fastening connection points of the rubber strip are average and reliable, the assembly strength is high, it is not easy to fall off, and the installation is simpler, shortening the assembly cycle of the whole machine.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a sealing machine with an improved sealing strip structure, including an upper body and a lower body connected by a hinge. A heat sealing mechanism composed of a rubber strip and a heating strip is provided between the covering and mating surfaces of the two. When the upper body and the lower body are covered with each other, the rubber strip and the heating strip are in clamping cooperation. The upper body or the lower body is provided with a frame strip made of a metal material integrally formed for firmly installing the rubber strip. The cross-sectional shape of the frame strip along the length direction is set in a U shape, including a back plate and two side edges formed by bending. Angles a are respectively formed between the side edges and the back plate, and the size of the angle a is 80° - 89°. A clamping cavity is semi-surrounded between the back plate and the two side edges; a fastening connection part is formed at the midline position of the top surface of the rubber strip, and the width of the fastening connection part is smaller than the width of the rubber strip to form a "丄" shaped rubber strip. A limiting shoulder is respectively formed on both sides of the rubber strip. The assembly part is embedded in the clamping cavity, and the two side edges cooperate to clamp and connect the fastening connection part, and the edges of the two side edges respectively abut against the corresponding limiting shoulders.

[0006] In a further technical solution, a fastening connection hole is provided in the middle of the back plate, and a fastening screw is connected between the fastening connection hole and the upper or lower body. The frame strip is fixedly installed on the upper or lower body by the fastening screw. A positioning hole is provided in the middle of the top surface of the fastening connection part, and the end of the fastening screw is inserted into the positioning hole.

[0007] In a further technical solution, the length of the frame strip is greater than the length of the rubber strip. After the rubber strip is assembled, the two ends of the frame strip are left open to form side connection parts. The side connection parts are provided with side connection holes. Side end screws are inserted into the side connection holes at both ends, and the side end screws at both ends are threaded to the corresponding upper or lower body.

[0008] In a further technical solution, the bottom surface of the adhesive strip is textured to improve clamping friction and prevent the sealed bag from shifting.

[0009] In a further technical solution, a vacuum chamber is provided, which is connected to a vacuum pump. The vacuum chamber is assembled on the mating surface of the upper or lower body. A clamping rubber ring is provided around the opening of the vacuum chamber, and the clamping rubber ring is located behind the rubber strip. Another clamping rubber ring is provided on the mating surface of the upper or lower body. When the upper and lower body are closed, the two clamping rubber rings overlap and clamp together to form a dense vacuum chamber.

[0010] In a further technical solution, an air nozzle device is also provided. The air nozzle device is installed on the upper or lower body. The air nozzle device includes a telescopic drive device and an air nozzle. The air nozzle moves in a telescopic motion toward the vacuum chamber and is connected to the telescopic drive device. The sealing machine has a textured bag mode and a smooth bag mode. When the sealing machine is in the textured bag mode, the air nozzle is in a retracted state, and the front end of the air nozzle is retracted to the rear side of the pressing rubber ring. When the sealing machine is in the smooth bag mode, the air nozzle is in an extended state, and the front end of the air nozzle extends at least to the front side of the pressing rubber ring.

[0011] In a further technical solution, when the sealing machine is in the smooth bag mode, the air nozzle has a vacuum state and a heat sealing state. When the air nozzle is in the vacuum state, the front end of the air nozzle extends to the front side of the adhesive strip and the heating strip; when the air nozzle is in the heat sealing state, the front end of the air nozzle retracts to the position between the adhesive strip and the pressing ring.

[0012] In a further technical solution, the inside of the air nozzle is hollowed out to form an internal air channel. A first air port is opened at the front end of the air nozzle, and a second air port is opened at the middle position of the air nozzle. The first air port and the second air port are respectively connected to the internal air channel. When the air nozzle is in a vacuum state, the first air port is located on the front side of the rubber strip and the heating strip, and the second air port is located in the vacuum chamber. When the air nozzle is in a heat-sealing state, the first air port is located between the rubber strip and the pressing rubber ring, and the second air port remains in the vacuum chamber.

[0013] In a further technical solution, the back plate is formed with a boss through a punching process. The boss protrudes towards the clamping cavity and is aligned vertically with the air nozzle to reinforce the pressure strip. The protrusion height h of the boss is 0.2mm-2mm.

[0014] In a further technical solution, the inner side of the back plate is formed with at least one protrusion, each protrusion having the same height, and each protrusion being distributed at intervals along the length of the back plate, and combined to form a reinforcing abutment top, which is aligned vertically with the air nozzle to reinforce the pressure of the rubber strip.

[0015] The advantages of this invention compared to existing technologies after adopting the above structure are as follows: This invention provides a sealing machine with an improved sealing strip structure, replacing the existing multi-point adhesive strip fastening structure. It adopts a clamping adhesive strip installation structure, which simplifies the assembly difficulty of the adhesive strip, improves the overall assembly efficiency, prevents the adhesive strip from falling off, and ensures it remains flat, further enhancing the stability of the equipment operation. The frame strip has a fastening connection hole at its center, and the adhesive strip has a positioning hole at its center. The fastening screws simultaneously achieve positioning between the adhesive strip and the frame strip, as well as the fastening installation of the frame strip. The structure is simple and ingeniously designed, further reducing manufacturing costs and assembly difficulty. The frame strip has a protrusion at its center, which enhances the pressure of the adhesive strip on the air nozzle, further improving the airtightness of the bag opening during vacuum processing in smooth bag mode, thereby improving the working stability of the equipment and the vacuuming quality. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a cross-sectional view of the sealing strip assembly in the longitudinal direction of this utility model.

[0018] Figure 2 This is an assembly diagram of the sealing strip assembly in this utility model.

[0019] Figure 3 This is a cross-sectional view of the sealing strip assembly in the width direction of this utility model.

[0020] Figure 4 This is a cross-sectional view of the present invention.

[0021] Figure 5 This is a schematic diagram of the air nozzle device in this utility model.

[0022] Figure 6 This is a partial structural diagram of the frame strip in Embodiment 2.

[0023] Figure 7 This is a partial structural diagram of Example 2.

[0024] Figure 8 It is a partial structural schematic diagram of the frame strip in Embodiment 3. Specific embodiments

[0025] The following are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly.

[0026] Embodiment 1

[0027] As Figures 1 to 5 shown, a sealing machine with an improved sealing strip structure includes an upper body 91 and a lower body 92 connected by hinges. A heat-sealing mechanism composed of a rubber strip 2 and a heating strip 921 is provided between the covering and mating surfaces of the two. When the upper body 91 and the lower body 92 are covered with each other, the rubber strip 2 and the heating strip 921 are clamped and fitted. The upper body 91 is provided with a frame strip 1 made of a metal material integrally formed, which is used to firmly install the rubber strip 2. The cross-sectional shape of the frame strip 1 along the length direction is U-shaped, including a back plate and two side edges 101 formed by bending. An included angle a is respectively formed between the side edges 101 and the back plate, and the size of the included angle a is 89°. A clamping cavity 10 is semi-surrounded between the back plate and the two side edges 101; a fastening connection part 21 is formed at the middle line position of the top surface of the rubber strip 2, and the width of the fastening connection part 21 is smaller than the width of the rubber strip 2 to form a rubber strip 2 in a "丄" shape. A limiting shoulder 22 is respectively formed on both sides of the rubber strip 2. The assembly part is embedded in the clamping cavity 10, and the two side edges 101 cooperate to clamp and connect the fastening connection part 21, and the edges of the two side edges 101 respectively abut against the corresponding limiting shoulders 22.

[0028] The present invention provides a sealing machine with an improved sealing strip structure, which replaces the existing multi-point rubber strip fastening structure and adopts a clamping rubber strip installation structure, which can simplify the assembly difficulty of the rubber strip 2, improve the assembly efficiency of the whole machine, the rubber strip is not easy to fall off, can always remain flat, and further strengthen the stability of the equipment operation.

[0029] Specifically, a fastening connection hole 11 is opened at the middle position of the back plate, and a fastening screw 911 is connected between the fastening connection hole 11 and the upper body 91. The frame strip 1 is fixedly installed on the upper body 91 through the fastening screw 911; a positioning hole 20 is opened at the middle position of the top surface of the fastening connection part 21, and the end of the fastening screw 911 is inserted into the positioning hole 20. A fastening connection hole 11 is provided at the center position of the frame strip 1, and a positioning hole 20 is provided at the center position of the rubber strip 2. Through the fastening screw 911, the positioning between the rubber strip 2 and the frame strip 1 and the firm installation of the frame strip 1 can be realized at the same time. The structure is simple and ingenious in design, further reducing the preparation cost and the assembly difficulty. When the rubber strip 2 is assembled, first put the positioning hole 20 on the fastening screw 911, and then, with the positioning hole 20 as the boundary, respectively embed and press towards both ends into the clamping cavity 10.

[0030] Specifically, the length of the frame strip 1 is greater than the length of the rubber strip 2. After the rubber strip 2 is assembled, the two ends of the frame strip 1 are left empty to form side connection parts. The side connection parts are provided with side connection holes 12. The side connection holes 12 at both ends are respectively inserted with side end screws 912. The side end screws 912 at both ends are respectively threaded to the corresponding upper body 91.

[0031] Specifically, the bottom surface of the adhesive strip 2 is textured 20 to improve clamping friction and prevent the sealed bag from shifting.

[0032] Specifically, a vacuum chamber 3 is also provided, which is connected to a vacuum pump. The vacuum chamber 3 is fitted onto the cover mating surface of the lower body 92. A clamping rubber ring 31 is provided around the opening of the vacuum chamber 3, and the clamping rubber ring 31 is located behind the rubber strip 2. Another clamping rubber ring 31 is provided on the cover mating surface of the upper body 91. When the upper body 91 and the lower body 92 are closed, the two clamping rubber rings 31 overlap and clamp together to form a dense vacuum chamber.

[0033] Specifically, an air nozzle device 8 is also provided, which is installed on the lower body 92. The air nozzle device 8 includes a telescopic drive device 80 and an air nozzle 8. The air nozzle 8 is telescopically connected to the vacuum chamber 3 and is driven by the telescopic drive device 80. The sealing machine has a textured 20-bag mode and a smooth bag mode. When the sealing machine is in the textured 20-bag mode, the air nozzle 8 is in a retracted state, and the front end of the air nozzle 8 is retracted to the rear side of the pressing rubber ring 31. When the sealing machine is in the smooth bag mode, the air nozzle 8 is in an extended state, and the front end of the air nozzle 8 extends at least to the front side of the pressing rubber ring 31.

[0034] Specifically, when the sealing machine is in the smooth bag mode, the air nozzle 8 has a vacuum state and a heat sealing state. When the air nozzle 8 is in the vacuum state, the front end of the air nozzle 8 extends to the front side of the adhesive strip 2 and the heating strip 921. When the air nozzle 8 is in the heat sealing state, the front end of the air nozzle 8 retracts to the position between the adhesive strip 2 and the pressing ring 31.

[0035] Specifically, the inside of the air nozzle 8 is hollowed out to form an internal air channel. A first air port 81 is opened at the front end of the air nozzle 8, and a second air port 82 is opened at the middle position of the air nozzle 8. The first air port 81 and the second air port 82 are respectively connected to the internal air channel. When the air nozzle 8 is in a vacuum state, the first air port 81 is located on the front side of the rubber strip 2 and the heating strip 921, and the second air port 82 is located in the vacuum chamber. When the air nozzle 8 is in a heat-sealing state, the first air port 81 is located between the rubber strip 2 and the pressing rubber ring 31, and the second air port 82 remains in the vacuum chamber.

[0036] Specifically, the thickness d of frame strip 1 is 1 mm.

[0037] Example 2

[0038] The sealing machine in this embodiment has a structure that is basically the same as that in Embodiment 1 above. The difference is that the frame strip 1 in this embodiment has a boss 102 at its center, which is used to reinforce the sealing strip 2 and the air nozzle 8 to reduce the chance of air leakage through gaps. The boss 102 formed at the center of the frame strip 1 can enhance the degree of pressure of the sealing strip 2 on the air nozzle 8, further improve the airtightness of the bag opening during vacuum processing in the smooth bag mode, and thus improve the working stability of the equipment and the vacuuming quality.

[0039] Specifically, a boss 102 is formed in the middle of the back plate by a punching process. The boss 102 protrudes towards the clamping cavity 10 and is aligned vertically with the air nozzle 8 to reinforce the pressure strip 2. The protrusion height h of the boss 102 is 0.5mm.

[0040] Example 3

[0041] The sealing machine in this embodiment has a structure that is basically the same as that in the sealing machine in embodiment 1 above. The difference is that the frame strip 1 in this embodiment has a reinforcing top at the center position, which also serves as a pressure reinforcement for the adhesive strip 2 and the air nozzle 8, so as to reduce the chance of air leakage from the gaps.

[0042] The back panel has four protrusions 103 formed in the middle, and each protrusion 103 has the same height. With the midpoint of the back panel as the boundary, each protrusion 103 is symmetrically distributed on both sides of the back panel and is combined to form a reinforced top.

[0043] The protrusion 103 includes protrusions with structural forms such as protrusions, protrusions, and protrusions. In this embodiment, the protrusion 103 adopts a columnar protrusion structure.

[0044] The center of the frame strip 1 is formed with a reinforcing top, which can also enhance the pressure of the adhesive strip 2 on the air nozzle 8, further improving the airtightness of the bag opening during vacuum processing in the smooth bag mode, thereby improving the working stability of the equipment and the vacuuming quality.

[0045] Specifically, the protrusion height h of the protrusion 103 is 0.5 mm, and the protrusion height of the resulting reinforcing abutment top is also 0.5 mm.

[0046] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A sealing machine with an improved sealing strip structure, comprising an upper body (91) and a lower body (92) hinged together, wherein a heat sealing mechanism consisting of a rubber strip (2) and a heating strip (921) is provided between the mating surfaces of the two bodies, and when the upper body (91) and the lower body (92) are mated together, the rubber strip (2) and the heating strip (921) are clamped together, characterized in that: The upper body (91) or the lower body (92) is provided with a frame bar (1) made of a metal material integrally formed, which is used to fasten and install a rubber strip (2). The cross-sectional shape of the frame bar (1) along the length direction is U-shaped, including a back plate and two side edges (101) formed by bending. An included angle a is respectively formed between the side edges (101) and the back plate, and the size of the included angle a is 80° - 89°. A clamping cavity (10) is semi-surrounded between the back plate and the two side edges (101); A fastening connection part (21) is formed at the middle line position of the top surface of the rubber strip (2). The width of the fastening connection part (21) is smaller than the width of the rubber strip (2), so as to form a rubber strip (2) in the shape of "丄". A limiting shoulder (22) is respectively formed on both sides of the rubber strip (2). The assembly part is embedded in the clamping cavity (10), and the two side edges (101) cooperate to clamp and connect the fastening connection part (21), and the edges of the two side edges (101) respectively abut against the corresponding limiting shoulders (22).

2. The sealing machine with an improved sealing strip structure according to claim 1, characterized in that: A fastening connection hole (11) is opened at the middle position of the back plate. A fastening screw (911) is connected between the fastening connection hole (11) and the upper body (91) or the lower body (92). The frame bar (1) is fixedly installed on the upper body (91) or the lower body (92) through the fastening screw (911); A positioning hole (20) is opened at the middle position of the top surface of the fastening connection part (21), and the end of the fastening screw (911) is inserted into the positioning hole (20).

3. A sealing machine with an improved sealing strip structure according to claim 2, characterized in that: The length of the frame bar (1) is greater than the length of the rubber strip (2). After the rubber strip (2) is assembled, both ends of the frame bar (1) are left empty to form side connection parts. A side connection hole (12) is opened in the side connection parts, and side end screws (912) are respectively inserted into the side connection holes (12) at both ends. The side end screws (912) at both ends are respectively threadedly connected to the corresponding upper body (91) or lower body (92).

4. A sealing machine with an improved sealing strip structure according to claim 3, characterized in that: A textured surface (20) is formed on the bottom surface of the rubber strip (2) to increase the clamping friction and prevent the sealing bag from shifting.

5. A sealing machine with an improved sealing strip structure according to claim 1, characterized in that: A vacuum pumping cavity (3) is further provided. The vacuum pumping cavity (3) is connected with a vacuum pump. The vacuum pumping cavity (3) is assembled on the covering and mating surface of the upper body (91) or the lower body (92). A pressing rubber ring (31) is arranged around the opening of the vacuum pumping cavity (3), and the pressing rubber ring (31) is located at the rear side of the rubber strip (2); Another pressing rubber ring (31) is provided on the covering and mating surface of the upper body (91) or the lower body (92). When the upper body (91) and the lower body (92) are covered, the two pressing rubber rings (31) are overlapped and pressed together to form a dense vacuum pumping chamber.

6. A sealing machine with an improved sealing strip structure according to claim 5, characterized in that: A nozzle device (8) is further provided. The nozzle device (8) is installed on the upper body (91) or the lower body (92). The nozzle device (8) includes a telescopic driving device (80) and a nozzle (8). The nozzle (8) makes a telescopic movement and cooperation towards the vacuum pumping cavity (3) and is传动连接于伸缩驱动装置(80) (The description here seems a bit unclear. Maybe it should be 'is drivingly connected to the telescopic driving device (80)'? If so, the translation would be: and is drivingly connected to the telescopic driving device (80)) The sealing machine has a textured surface (20) bag mode and a smooth surface bag mode, When the sealing machine is in the textured (20) bag mode, the air nozzle (8) is in a retracted state, and the front end of the air nozzle (8) is retracted to the rear side of the pressing rubber ring (31); When the sealing machine is in smooth bag mode, the air nozzle (8) is extended, and the front end of the air nozzle (8) extends at least to the front side of the pressing rubber ring (31).

7. A sealing machine with an improved sealing strip structure according to claim 6, characterized in that: When the sealing machine is in smooth bag mode, the air nozzle (8) has a vacuum state and a heat sealing state. The air nozzle (8) is in a vacuum state, and the front end of the air nozzle (8) extends to the front side of the rubber strip (2) and the heating strip (921); The air nozzle (8) is in a heat-sealed state, and the front end of the air nozzle (8) retracts to the position between the rubber strip (2) and the pressing rubber ring (31).

8. A sealing machine with an improved sealing strip structure according to claim 7, characterized in that: The interior of the nozzle (8) is hollowed out to form an internal air passage. A first air port (81) is opened at the front end of the nozzle (8), and a second air port (82) is opened at the middle position of the nozzle (8). The first air port (81) and the second air port (82) are respectively connected to the internal air passage. When the air nozzle (8) is in the vacuum state, the first air port (81) is located on the front side of the rubber strip (2) and the heating strip (921), and the second air port (82) is located in the vacuum chamber; When the air nozzle (8) is in the heat-sealed state, the first air port (81) is located between the rubber strip (2) and the pressing rubber ring (31), while the second air port (82) remains in the vacuum chamber.

9. A sealing machine with an improved sealing strip structure according to claim 8, characterized in that: The back plate is formed with a boss (102) by a punching process. The boss (102) protrudes towards the clamping cavity (10) and is aligned vertically with the air nozzle (8) to reinforce the pressure of the rubber strip (2). The protrusion height h of the boss (102) is 0.2mm-2mm.

10. A sealing machine with an improved sealing strip structure according to claim 8, characterized in that: The inner side of the back plate is formed with at least one protrusion (103), each protrusion (103) having the same protrusion height. Each protrusion (103) is distributed at intervals along the length direction of the back plate and is combined to form a reinforcing top. The reinforcing top is aligned vertically with the air nozzle (8) and is used to reinforce the pressure of the rubber strip (2).

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