Square-bottom valve bag machining heat-sealing device

Abstract

The utility model discloses a square bottom valve bag processing heat sealing device, and particularly relates to the technical field of heat sealing devices, the square bottom valve bag processing heat sealing device comprises a base, a detachable outer support is arranged at the top end of the base, a hollow roller is rotatably connected to the inner wall of the outer support, the hollow roller is made of heat-conducting metal materials, a pressing assembly is arranged in the outer support, and the pressing assembly is connected with the hollow roller. And the downward pressing assembly is located above the hollow roller and comprises an inner support, and a downward pressing roller is rotationally connected to the inner wall of the inner support. According to the utility model, the square-bottom valve bag is clamped between the hollow roller and the lower pressing roller, and the hot-pressed and clamped position of the square-bottom valve bag can be adjusted by utilizing the rotation of the hollow roller and the lower pressing roller when the square-bottom valve bag is clamped, so that the operation is more convenient, and the hollow roller and the lower pressing roller can be far away from the edge of the adhesion part; and viscous materials overflowing after hot pressing are prevented from being attached to the hollow roller and the lower pressing roller and difficult to clean.

Description

A heat-sealing device for processing square bottom valve bags Technical Field

[0001] This utility model relates to the technical field of heat sealing devices, specifically to a heat sealing device for processing square bottom valve bags. Background Technology

[0002] Square-bottom valve bags are a common type of plastic product. Their raw materials include polyethylene, polypropylene, polyester, nylon, and other plastic materials. They are characterized by moisture resistance, durability, and ease of processing, and are suitable for packaging chemical, food, and pharmaceutical products.

[0003] In the process of manufacturing square bottom valve bags, the initially produced square bottom valve bags are open at both the top and bottom. At this time, adhesive materials such as glue are needed to seal the bottom opening and heat-press it closed, leaving only the top opening for filling the product, such as the heat-sealing device for the valve port strip of a square bottom valve bag disclosed in the prior art with the publication number CN212654623U.

[0004] Currently, adhesive materials become even more viscous when heated during hot pressing, and the pressure causes the two parts to adhere tightly together, thus improving the sealing strength. However, the adhesive material softens when heated and easily overflows from the edges of the adhered area when squeezed. If the hot pressing device is located at this edge, the overflowing adhesive material easily adheres to the device and is difficult to clean. Furthermore, if the adhesion is not accurately pressed after being fixed, it is necessary to release the fixation, adjust the position of the square bottom valve pocket, and then press again until the correct position is achieved. This results in low precision and a cumbersome fixing process in existing heat sealing devices, reducing work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a heat-sealing device for processing square bottom valve bags. By rotating the hollow roller and the lower pressure roller, the clamping position of the square bottom valve bag can be adjusted, and there is no need to unfix the square bottom valve bag during the adjustment process. The adjustment speed is faster and the accuracy is higher, thus improving the heat-sealing efficiency of the square bottom valve bag.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-sealing device for processing square bottom valve bags, including a base, a detachable outer support at the top of the base, and a hollow roller rotatably connected to the inner wall of the outer support. The hollow roller is made of a heat-conducting metal material, such as copper.

[0007] The outer support is equipped with a pressing component located above the hollow roller. The pressing component includes an inner support, and a pressing roller is rotatably connected to the inner wall of the inner support. The adhesive part of the square bottom valve pocket is sandwiched between the hollow roller and the pressing roller.

[0008] Furthermore, the outer support is provided with detachable end plates on both sides, and the two end plates are respectively located at both ends of the hollow roller. An electric heating rod is installed on the end plate, and one end of the electric heating rod passes through the outer support and extends into the interior of the hollow roller.

[0009] Furthermore, two guide rods are fixedly provided at the top of the pressing component, and the top of the guide rods extends to the top of the outer bracket. At least one return spring is fixedly provided between the top of the inner bracket and the inner top of the outer bracket, and the return spring is located between the two guide rods.

[0010] Furthermore, the top of the outer support is provided with an iron top plate, the top end of the guide rod is fixedly connected to the bottom end of the iron top plate, and an electromagnet is provided below the iron top plate. The electromagnet is installed on the top of the outer support. The electromagnet consists of an iron core and a coil wound around the outside of the iron core. According to the principle of magnetic effect of current, the electromagnet will generate magnetic force after the coil is energized, and generate an attraction force on the iron top plate.

[0011] Furthermore, a fixing component is provided below the hollow roller. The fixing component includes two rocker plates, each with a protrusion fixed at its bottom end. The bottom ends of the two protrusions are hinged to the top of the base.

[0012] Furthermore, the fixing component also includes a handle, the front ends of both rockers are fixedly connected to the handle, the straight-line distance between the protrusion and the handle is greater than the straight-line distance between the protrusion and the rear end of the rocker, the rear end of the rocker extends to below the hollow roller, the top of the rear end of both rockers is fixedly provided with an anti-slip pad, and the bottom of the rear end of both rockers is fixedly provided with a counterweight.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. By clamping the square bottom valve bag between the hollow roller and the lower pressure roller, the rotation of the hollow roller and the lower pressure roller can be used to adjust the position of the square bottom valve bag under hot pressing while it is clamped. This is not only more convenient, but also keeps the hollow roller and the lower pressure roller away from the edge of the adhesion area, preventing the sticky material overflowing after hot pressing from adhering to the hollow roller and the lower pressure roller and being difficult to clean.

[0015] 2. After the square bottom valve bag is pressed and fixed by the hollow roller and the lower pressure roller, the rotation of the hollow roller and the lower pressure roller can adjust the clamping position of the square bottom valve bag. Moreover, there is no need to remove the fixing of the square bottom valve bag during the adjustment process. The adjustment speed is faster and the accuracy is higher, thus improving the heat sealing efficiency of the square bottom valve bag. Attached Figure Description

[0016] Figure 1 is a front structural view of this utility model;

[0017] Figure 2 is a structural diagram of the back of this utility model;

[0018] Figure 3 is a cross-sectional view of the hollow roller of this utility model;

[0019] Figure 4 is a structural diagram of the pressure-down component of this utility model;

[0020] Figure 5 is a top view of the fixing component of this utility model;

[0021] Figure 6 is a bottom view of the fixing component of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Base; 2. Fixing assembly; 201. Handle; 202. Rocker; 203. Anti-slip pad; 204. Protrusion; 205. Counterweight; 3. Outer support; 4. End plate; 5. Hollow roller; 6. Pressing assembly; 601. Inner support; 602. Pressing roller; 7. Guide rod; 8. Iron top plate; 9. Electromagnet; 10. Return spring; 11. Electric heating rod. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model provides a heat sealing device for processing square bottom valve pockets, as shown in Figures 1-6. It includes a base 1, a detachable outer bracket 3 at the top of the base 1, and a hollow roller 5 rotatably connected to the inner wall of the outer bracket 3. The hollow roller 5 is made of a heat-conducting metal material, such as copper. Detachable end plates 4 are provided on both sides of the outer bracket 3. An electric heating rod 11 is installed on the end plate 4, and one end of the electric heating rod 11 extends into the interior of the hollow roller 5.

[0026] Before heat sealing, first apply an adhesive material, such as hot melt adhesive, to the pasting part of the square bottom valve bag. Then place the corresponding part of the square bottom valve bag on the top of the hollow roller 5. At this time, the electric heating rod 11 is in the open state. The electric heating rod 11 heats up inside the hollow roller 5 and transfers the heat through the hollow roller 5 to the surface of the hollow roller 5, so that the temperature of the surface of the hollow roller 5 reaches about 80°C.

[0027] The outer support 3 is provided with a pressing component 6, which is located above the hollow roller 5. The pressing component 6 includes an inner support 601, and a pressing roller 602 is rotatably connected to the inner wall of the inner support 601. The adhesive part of the square bottom valve pocket is sandwiched between the hollow roller 5 and the pressing roller 602.

[0028] In order to clamp and fix the square bottom valve bag when it is attached, as shown in Figures 1 and 4, two guide rods 7 are fixedly provided at the top of the pressing component 6. The top of the guide rods 7 extends to the top of the outer bracket 3. Two return springs 10 are fixedly provided at the top of the inner bracket 601. The two return springs 10 are located between the two guide rods 7.

[0029] The outer support 3 is provided with an iron top plate 8. The top end of the guide rod 7 is fixedly connected to the bottom end of the iron top plate 8. An electromagnet 9 is provided below the iron top plate 8. The electromagnet 9 is installed at the top of the outer support 3.

[0030] After the square-bottomed valve bag is placed on top of the hollow roller 5, the electromagnet 9 is energized, generating a magnetic force that attracts the iron top plate 8 downwards. The iron top plate 8 then moves downwards, pushing the guide rod 7. The guide rod 7 pushes the inner support 601 and the lower pressure roller 602 downwards, causing the lower pressure assembly 6 to move downwards and press against the top of the square-bottomed valve bag, clamping the bag between the lower pressure roller 602 and the hollow roller 5. Simultaneously, the return spring 10 is stretched. Although the square-bottomed valve bag is clamped, the hollow roller 5 can still rotate relative to the outer support 3. The lower pressure roller 602 can rotate relative to the inner support 601. Therefore, by pulling the square bottom valve bag or moving the lower pressure roller 602, the hollow roller 5 and the lower pressure roller 602 can be rotated and the square bottom valve bag can be moved. This allows the position of the square bottom valve bag being clamped and hot-pressed to be adjusted while it is being pressed and fixed. This is not only more convenient, but also keeps the hollow roller 5 and the lower pressure roller 602 away from the edge of the sticky part of the square bottom valve bag, preventing the sticky material overflowing after hot pressing from adhering to the lower pressure roller 602 and the hollow roller 5 and making it difficult to clean.

[0031] Then, continue hot pressing for about 10 seconds. During the hot pressing process, the adhesive material softens due to heat and its viscosity increases. The pressed and adhered parts are tightly bonded together and connected to each other through the adhesive material, thus sealing the part. After the heat sealing is completed, the electromagnet 9 is de-energized and loses its magnetism. The spring force of the return spring 10 is released, pulling the pressing component 6 upward and finally returning it to its original position, releasing the heat pressure on the bottom valve pocket and completing the heat sealing work.

[0032] When hot pressing after adjusting the position of the square bottom valve pocket, the hollow roller 5 needs to be fixed to make the hot pressing more stable. As shown in Figures 1, 5 and 6, the present invention has a fixing component 2 below the hollow roller 5. The fixing component 2 includes two rocker plates 202. The bottom end of the rocker plate 202 is fixed with a protrusion 204. The bottom end of the protrusion 204 is hinged to the top end of the base 1.

[0033] The fixing component 2 also includes a handle 201. The front end of the rocker 202 is fixedly connected to the handle 201. The straight distance between the protrusion 204 and the handle 201 is greater than the straight distance between the protrusion 204 and the rear end of the rocker 202. The rear end of the rocker 202 extends below the hollow roller 5. An anti-slip pad 203 is fixedly provided at the top of the rear end of the rocker 202. The anti-slip pad 203 is made of fluororubber and can withstand high temperatures above 150°C. A counterweight 205 is fixedly provided at the bottom of the rear end of the rocker 202.

[0034] The entire rocker 202 forms a lever structure with the protrusion 204 as the fulcrum. When the fixing component 2 is not used, the weight of the counterweight 205 causes the rear end of the rocker 202 to drop, and the anti-slip pad 203 does not contact the hollow roller 5. After the position of the square bottom valve pocket is adjusted, the handle 201 is manually pressed down, and the entire rocker 202 will rotate around the protrusion 204. The front end of the rocker 202 moves down, and the rear end of the rocker 202 tilts up, so that the anti-slip pad 203 is in close contact with the bottom end of the hollow roller 5. This makes it difficult for the hollow roller 5 to rotate under the friction of the anti-slip pad 203, thus fixing the hollow roller 5 and fixing the position of the square bottom valve pocket. Furthermore, since the straight distance between the protrusion 204 and the handle 201 is greater than the straight distance between the protrusion 204 and the rear end of the rocker 202, the lever arm of the force applied to the handle 201 is greater than the lever arm of the force applied to the rear end of the rocker 202. According to the lever principle, this makes fixing the hollow roller 5 easier.

[0035] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat-sealing device for processing square-bottom valve bags, comprising a base (1), wherein an outer support (3) is provided at the top of the base (1), characterized in that: A hollow roller (5) is rotatably connected to the inner wall of the outer support (3); a pressing component (6) is provided inside the outer support (3), the pressing component (6) is located above the hollow roller (5), the pressing component (6) includes an inner support (601), and a pressing roller (602) is rotatably connected to the inner wall of the inner support (601).

2. The heat-sealing device for processing square-bottom valve bags according to claim 1, characterized in that: The outer support (3) is provided with end plates (4) on both sides. The two end plates (4) are respectively located at both ends of the hollow roller (5). An electric heating rod (11) is installed on the end plate (4). One end of the electric heating rod (11) passes through the outer support (3) and extends into the hollow roller (5).

3. The heat-sealing device for processing square-bottom valve bags according to claim 1, characterized in that: The top of the pressing component (6) is fixedly provided with two guide rods (7), the top of the guide rods (7) extends to the top of the outer bracket (3), and at least one return spring (10) is fixedly provided between the top of the inner bracket (601) and the inner top of the outer bracket (3).

4. The heat-sealing device for processing square-bottom valve bags according to claim 3, characterized in that: The outer support (3) is provided with an iron top plate (8) at the top, and the top end of the guide rod (7) is fixedly connected to the bottom end of the iron top plate (8).

5. The heat-sealing device for processing square-bottom valve bags according to claim 4, characterized in that: An electromagnet (9) is provided below the iron top plate (8), and the electromagnet (9) is installed on the top of the outer support (3).

6. The heat-sealing device for processing square-bottom valve bags according to claim 1, characterized in that: The hollow roller (5) is provided with a fixing component (2) below it. The fixing component (2) includes two rocker plates (202). The bottom ends of the two rocker plates (202) are fixed with protrusions (204). The bottom ends of the two protrusions (204) are hinged to the top of the base (1).

7. The heat-sealing device for processing square-bottom valve bags according to claim 6, characterized in that: The fixing component (2) also includes a handle (201), the front ends of the two rockers (202) are fixedly connected to the handle (201), and the rear ends of the rockers (202) are located below the hollow roller (5).

8. The heat-sealing device for processing square-bottom valve bags according to claim 7, characterized in that: Anti-slip pads (203) are fixedly provided at the top rear end of both rockers (202), and counterweights (205) are fixedly provided at the bottom rear end of both rockers (202).

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