Sealing device for square-bottom valve bag

Abstract

The utility model relates to the technical field of square-bottom valve bag production, and discloses a sealing device for a square-bottom valve bag, which comprises a workbench. According to the sealing device for the square-bottom valve bags, by arranging the heat sealing assembly, the limiting assembly and the driving assembly, the multiple square-bottom valve bags are arranged between every two adjacent vertical rods, then the sealing positions of the square-bottom valve bags are folded, the square-bottom valve bags are arranged on heating pieces, and at the moment, a stepping motor is started to drive a second bevel gear to rotate through an output shaft; a second bevel gear and a first bevel gear are used in cooperation, so that a threaded rod rotates to drive two threaded blocks to move relatively, then the two threaded blocks and two connecting rods pull a connecting plate to move downwards, and a vertical rod drives a limiting pressing plate to move downwards to fix a square bottom valve bag; and finally, the electric push rod is started to drive the hot pressing block to move downwards to make contact with the square bottom valve bag and the heating piece for heat sealing, manual sealing is not needed, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of square-bottom valve pocket production, and particularly relates to a sealing device for square-bottom valve pockets. Background Art

[0002] A square-bottom valve pocket is a small bulk packaging container, which is convenient, tidy and has good sealing performance. It is one of the most popular packaging materials in the world, especially suitable for export packaging. The square-bottom valve pocket is based on a paper-plastic composite bag or a kraft paper bag. The specification size is according to the customer's requirements. Using environmentally friendly glue, it is made into a packaging bag with upper and lower seals or a lower seal and an upper opening after manual folding.

[0003] When the existing square-bottom valve pockets are produced, they need to be sealed manually, which not only increases the workload and working intensity of the staff, but also can only seal one valve pocket at a time during manual sealing, resulting in low work efficiency. Therefore, a sealing device for square-bottom valve pockets is proposed to solve the above-mentioned technical problems. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a sealing device for square-bottom valve pockets, which has the advantages of reducing the workload and working intensity of the staff and improving the processing efficiency of square-bottom valve pockets, and solves the problems that when the existing square-bottom valve pockets are produced, they need to be sealed manually, which not only increases the workload and working intensity of the staff, but also can only seal one valve pocket at a time during manual sealing, resulting in low work efficiency.

[0006] (II) Technical Solutions

[0007] To achieve the purpose of reducing the workload and working intensity of the staff and improving the processing efficiency of square-bottom valve pockets, the utility model provides the following technical solutions: A sealing device for square-bottom valve pockets includes a workbench, an installation frame is arranged on the top of the workbench, a heating sheet is arranged on the top of the workbench, a heat-sealing component is arranged on the inner top wall of the installation frame, a connecting plate is arranged on the inner wall of the workbench, five limiting components are arranged on the top of the connecting plate and are distributed at equal intervals from left to right, the tops of the five limiting components all extend to the top of the workbench, and the five limiting components are all located in front of the heating sheet. A driving component hinged to the bottom of the connecting plate is arranged between the left and right sides of the inner wall of the workbench;

[0008] The heat-sealing component includes an electric push rod, the electric push rod is arranged on the inner top wall of the installation frame, a heat pressing block is arranged at the output end of the electric push rod, and two telescopic rods are arranged between the top of the heat pressing block and the inner top wall of the installation frame and are symmetrically distributed from left to right;

[0009] The limiting component includes a vertical rod. A vertical rod with one end extending to the top of the workbench is arranged at the top of the connecting plate, and a limiting pressure plate is arranged at the top of the vertical rod.

[0010] The driving component includes a threaded rod. A threaded rod is arranged between the left and right inner walls of the workbench. A first bevel gear is arranged on the outer part of the threaded rod. There are two threaded blocks respectively located on the left and right sides of the first bevel gear on the outer part of the threaded rod. Connecting rods hinged to the bottom of the connecting plate are arranged at the tops of the two threaded blocks. A stepping motor is arranged on the inner bottom wall of the workbench, and a second bevel gear externally meshed with the outer part of the first bevel gear is arranged at the output shaft of the stepping motor.

[0011] Preferably, the inside of the workbench is hollow and a maintenance box door is arranged on its front side wall.

[0012] Preferably, the telescopic rod includes a sleeve and an extension rod. The sleeve is fixedly connected to the inner top wall of the installation frame. The inner wall of the sleeve is slidably connected with an extension rod extending to its bottom, and the bottom of the extension rod is fixedly connected to the top of the hot pressing block.

[0013] Preferably, an anti-slip pad is fixedly connected to the bottom of the limiting pressure plate.

[0014] Preferably, the inside of the installation frame is hollow and its front and rear side walls are both designed to be open.

[0015] Preferably, two sections of threads with opposite directions are arranged on the outer part of the threaded rod, and the lengths of the two sections of threads are equal.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a sealing device for square-bottom valve bags, which has the following beneficial effects:

[0018] For the sealing device for square-bottom valve bags, by arranging a heat-sealing component, a limiting component and a driving component, multiple square-bottom valve bags are respectively placed between two adjacent vertical rods, and then the folded edge of the sealing part of the square-bottom valve bag is placed on the heating sheet. At this time, the stepping motor is started to drive the second bevel gear to rotate through the output shaft. Due to the cooperation of the second bevel gear and the first bevel gear, the threaded rod rotates to drive the two threaded blocks to move relatively. Then, the two threaded blocks and the two connecting rods pull the connecting plate to move downward, so that the vertical rod drives the limiting pressure plate to move downward to fix the square-bottom valve bag. Finally, the electric push rod is started to drive the hot pressing block to move downward to contact with the square-bottom valve bag and the heating sheet for heat sealing. There is no need for manual sealing, which reduces the labor intensity of the staff. At the same time, multiple square-bottom valve bags can be sealed at one time, improving the processing efficiency of the square-bottom valve bags and enhancing the practicability of the device. Brief Description of the Drawings

[0019] Figure 1 This is the front sectional view of the utility model;

[0020] Figure 2 This is the partial top view of the connection between the workbench and the heating sheet of the utility model.

[0021] In the figure: 1. Workbench; 2. Installation frame; 3. Heating sheet; 4. Heat-sealing assembly; 41. Electric push rod; 42. Heat-pressing block; 43. Telescopic rod; 5. Connecting plate; 6. Limiting assembly; 61. Vertical rod; 62. Limiting pressing plate; 7. Driving assembly; 71. Threaded rod; 72. First bevel gear; 73. Threaded block; 74. Connecting rod; 75. Stepping motor; 76. Second bevel gear. Detailed Description of the Preferred Embodiment

[0022] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1-2 , a sealing device for square-bottom valve bags, including a workbench 1. The interior of the workbench 1 is hollow and its front side wall is provided with a maintenance box door. The top of the workbench 1 is fixedly connected with an installation frame 2. The interior of the installation frame 2 is hollow and its front and rear side walls are both designed with openings. The top of the workbench 1 is fixedly connected with a heating sheet 3. The inner top wall of the installation frame 2 is fixedly connected with a heat-sealing assembly 4. The heat-sealing assembly 4 includes an electric push rod 41. The inner top wall of the installation frame 2 is fixedly connected with an electric push rod 41. The output end of the electric push rod 41 is fixedly connected with a heat-pressing block 42. Between the top of the heat-pressing block 42 and the inner top wall of the installation frame 2, there are two telescopic rods 43 fixedly connected and distributed symmetrically left and right. The telescopic rod 43 includes a sleeve and an extension rod. The sleeve is fixedly connected to the inner top wall of the installation frame 2. The inner wall of the sleeve is slidably connected with an extension rod extending to its bottom. The bottom of the extension rod is fixedly connected to the top of the heat-pressing block 42.

[0024] The inner wall of the workbench 1 is slidably connected with a connecting plate 5. The top of the connecting plate 5 is fixedly connected with five limiting assemblies 6 distributed equidistantly left and right. The tops of the five limiting assemblies 6 all extend to the top of the workbench 1. The five limiting assemblies 6 are all located in front of the heating sheet 3. The limiting assembly 6 includes a vertical rod 61. The top of the connecting plate 5 is fixedly connected with a vertical rod 61 extending to the top of the workbench 1. The top of the vertical rod 61 is fixedly connected with a limiting pressing plate 62. The bottom of the limiting pressing plate 62 is fixedly connected with an anti-slip pad.

[0025] A driving component 7 which is rotatably connected between the left and right sides of the inner wall of the workbench 1 and is hinged to the bottom of the connecting plate 5 is provided. The driving component 7 includes a threaded rod 71. The threaded rod 71 is rotatably connected between the left and right sides of the inner wall of the workbench 1. Two sections of threads with opposite directions are arranged on the outer part of the threaded rod 71, and the lengths of the two sections of threads are equal. A first bevel gear 72 is fixedly connected to the outer part of the threaded rod 71. Two threaded blocks 73 which are located on the left and right sides of the first bevel gear 72 respectively and have a quantity of two are threadedly connected to the outer part of the threaded rod 71. Connecting rods 74 which are hinged to the bottom of the connecting plate 5 are hinged to the tops of the two threaded blocks 73. A stepping motor 75 is fixedly connected to the inner bottom wall of the workbench 1. A second bevel gear 76 which is externally meshed with the outer part of the first bevel gear 72 is fixedly connected to the output shaft of the stepping motor 75.

[0026] It should be noted that the heating sheet 3, the electric push rod 41, the hot pressing block 42 and the stepping motor 75 appearing in this application document are all externally connected with control switches and driving power supplies, and the heating sheet 3, the electric push rod 41, the hot pressing block 42 and the stepping motor 75 are all conventional known devices. The standard parts used in this application document can all be purchased from the market. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding and the like which are mature in the prior art for connection, and the machines, parts and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, the content not described in detail in the description belongs to the prior art well-known to those skilled in the art, and no specific description will be made here.

[0027] To sum up, for the sealing device for square-bottom valve bags, by arranging the heat-sealing component 4, the limiting component 6 and the driving component 7, a plurality of square-bottom valve bags are respectively placed between two adjacent vertical rods 61, and then the folded edge of the sealing part of the square-bottom valve bag is placed on the heating sheet 3. At this time, start the stepping motor 75 to drive the second bevel gear 76 to rotate through the output shaft. Due to the cooperation of the second bevel gear 76 and the first bevel gear 72, the threaded rod 71 rotates to drive the two threaded blocks 73 to move relatively. Then, the two threaded blocks 73 and the two connecting rods 74 pull the connecting plate 5 to move downward, so that the vertical rod 61 drives the limiting pressing plate 62 to move downward to fix the square-bottom valve bag. Finally, start the electric push rod 41 to drive the hot pressing block 42 to move downward to contact with the square-bottom valve bag and the heating sheet 3 for heat sealing. There is no need for manual sealing, which reduces the labor intensity of the staff. At the same time, multiple square-bottom valve bags can be sealed at one time, improving the processing efficiency of the square-bottom valve bags, enhancing the practicability of the device, and solving the problem that when the existing square-bottom valve bags are produced, manual sealing is required, which not only increases the workload and labor intensity of the staff, but also only one valve bag can be sealed manually at a time, and the working efficiency is low.

[0028] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for square-bottom valve bags, comprising a workbench (1), characterized in that: A mounting frame (2) is provided on the top of the workbench (1). A heating sheet (3) is provided on the top of the workbench (1). A heat-sealing assembly (4) is provided on the inner top wall of the mounting frame (2). A connecting plate (5) is provided on the inner wall of the workbench (1). Five limiting assemblies (6) are provided on the top of the connecting plate (5) and are equally spaced left and right. The tops of the five limiting assemblies (6) all extend to the top of the workbench (1). The five limiting assemblies (6) are all located on the front side of the heating sheet (3). A driving assembly (7) hinged to the bottom of the connecting plate (5) is provided between the left and right sides of the inner wall of the workbench (1); The heat-sealing assembly (4) includes an electric push rod (41). The electric push rod (41) is provided on the inner top wall of the mounting frame (2). A heat pressing block (42) is provided at the output end of the electric push rod (41). Two telescopic rods (43) are provided between the top of the heat pressing block (42) and the inner top wall of the mounting frame (2) and are symmetrically distributed left and right; The limiting assembly (6) includes a vertical rod (61). The vertical rod (61) with one end extending to the top of the workbench (1) is provided on the top of the connecting plate (5). A limiting pressing plate (62) is provided on the top of the vertical rod (61); The driving assembly (7) includes a threaded rod (71). The threaded rod (71) is provided between the left and right sides of the inner wall of the workbench (1). A first bevel gear (72) is provided on the outer part of the threaded rod (71). Two threaded blocks (73) are provided on the outer part of the threaded rod (71) and are respectively located on the left and right sides of the first bevel gear (72). Connecting rods (74) hinged to the bottom of the connecting plate (5) are provided on the tops of the two threaded blocks (73). A stepping motor (75) is provided on the inner bottom wall of the workbench (1). A second bevel gear (76) externally meshing with the first bevel gear (72) is provided at the output shaft of the stepping motor (75).

2. The sealing device for square-bottom valve bags according to claim 1, wherein: The interior of the workbench (1) is hollow and its front side wall is provided with a maintenance box door.

3. The sealing device for square-bottom valve bags according to claim 1, characterized in that: The telescopic rod (43) includes a sleeve and an extension rod. The sleeve is fixedly connected to the inner top wall of the mounting frame (2). The inner wall of the sleeve is slidably connected with the extension rod with one end extending to its bottom. The bottom of the extension rod is fixedly connected to the top of the heat pressing block (42).

4. A sealing device for square-bottom valve bags according to claim 1, characterized in that: An anti-slip pad is fixedly connected to the bottom of the limiting pressing plate (62).

5. A sealing device for square-bottom valve bags according to claim 1, characterized in that: The interior of the mounting frame (2) is hollow and its front and rear side walls are both designed with openings.

6. The sealing device for square-bottom valve bags according to claim 1, characterized in that: Two sections of threads with opposite directions are provided on the outer part of the threaded rod (71), and the lengths of the two sections of threads are equal.

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