Heating assembly for heat sealing of plastic packaging bag

Abstract

The utility model relates to a heating assembly for heat sealing of plastic packaging bags, which comprises a mounting seat, a mounting groove is arranged at the top of the mounting seat, a heating strip is detachably arranged at the top of the mounting groove, two ends of the heating strip are fixedly connected with lantern rings, the bottom of the mounting seat is fixedly connected with a base, and the lantern rings are fixedly connected with the base. A first connecting groove and a second connecting groove are formed in the side walls of the two ends of the base correspondingly, a first connecting mechanism is arranged in the first connecting groove, and a second connecting mechanism is arranged in the second connecting groove. The utility model has the beneficial effects that the movable seat, the telescopic guide pillar and the spring are arranged, so that the heating strip can be always kept in a tightened state in the heating process, and the heat sealing effect is prevented from being influenced by the loosening of the heating strip in a high-temperature environment.

Description

A heating assembly for heat sealing plastic packaging bags Technical Field

[0001] This utility model relates to the technical field of plastic packaging bag processing equipment, and specifically to a heating component for heat sealing plastic packaging bags. Background Technology

[0002] Plastic bags are a common packaging material, characterized by their lightweight, waterproof, moisture-proof, and corrosion-resistant properties. They are widely used for packaging food, pharmaceuticals, and industrial products. Plastic bags are typically made of plastic materials such as polyethylene, polypropylene, and polyvinyl chloride. Different plastic materials have different properties and are used in different packaging applications. Packaging bags often need to be sealed during use, and this sealing is usually achieved using a heating device.

[0003] For example, a heating assembly for a vacuum sealing machine, disclosed in CN222452745U, includes a fixed base. Inside the fixed base, heating elements, heat insulation components, and a support are arranged sequentially from top to bottom. The heating elements are fixed to the support using high-temperature adhesive tape, and the support is snapped upwards into the fixed base. During heating, the heating assembly first installs the heating elements, heat insulation components, and support onto the fixed base, and then directly installs the assembled heating assembly onto the vacuum sealing machine. This simplifies operation and improves assembly accuracy and efficiency.

[0004] However, the heating strip will expand and contract in alternating hot and cold environments, causing it to deform during heating and thus loosen. The heating strip is fixed to the bracket by high-temperature adhesive tape, and the high-temperature adhesive tape is prone to loosening when the heating strip expands, affecting the heat sealing effect. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that the heating strip of existing heating components is prone to coming loose during heating.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heating assembly for heat-sealing plastic packaging bags includes a mounting base. The top of the mounting base has a mounting groove, and a heating strip is detachably mounted on the top of the mounting groove. Both ends of the heating strip are fixedly connected to collars. A base is fixedly connected to the bottom of the mounting base. The side walls at both ends of the base have a first connecting groove and a second connecting groove, respectively. A first connecting mechanism is disposed inside the first connecting groove, and a second connecting mechanism is disposed inside the second connecting groove. The first connecting mechanism includes a fixed seat, which is fixedly connected to the side wall of the first connecting groove. A first positioning pin is vertically fixedly mounted on the top of the fixed seat. The second connecting mechanism includes a movable seat, which is slidably connected to the bottom of the second connecting groove. A second positioning pin is fixedly mounted on the top of the movable seat. A telescopic rod connects the movable seat and the side wall of the second connecting groove. A tension spring surrounds the telescopic rod, and both ends of the tension spring are fixedly connected to the side wall of the movable seat and the side wall of the second connecting groove, respectively.

[0008] Furthermore, the first connecting mechanism also includes an elastic cover plate, which is slidably connected to the side wall of the fixed base.

[0009] Furthermore, the top of the elastic cover plate has a through hole, which is located directly above the first positioning pin, and the side wall of the elastic cover plate away from the base is vertically fixedly connected to the first handle.

[0010] Furthermore, the second connecting mechanism also includes a second handle, which is fixedly connected to the side wall of the movable seat away from the base.

[0011] Furthermore, the top of the second locating pin is inclined toward the telescopic rod.

[0012] Furthermore, a pair of guide seats are symmetrically fixed on the upper and lower sides of the first and second connecting grooves on the side away from the base. A pair of elastic top blocks are symmetrically arranged between the opposing sidewalls of the guide seats. Conductive connectors are fixedly connected to both sidewalls of the base. The elastic top blocks are electrically connected to the conductive connectors.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The heating component for heat sealing plastic packaging bags of this utility model, by being equipped with a movable seat, a telescopic rod and a spring, can keep the heating strip taut at all times during the heating process, preventing it from loosening under high temperature and affecting the heat sealing effect.

[0015] 2. The heating component for heat sealing plastic packaging bags of this utility model, by providing a guide seat and an elastic top block, ensures that the heating strip is always in contact with the elastic top block when it deforms, thereby ensuring that the heating strip is always connected to the circuit and preventing the circuit from being broken during heating. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of a heating component for heat sealing plastic packaging bags according to the present invention;

[0017] Figure 2 is a front view schematic diagram of a heating component for heat sealing plastic packaging bags according to the present invention;

[0018] Figure 3 is an enlarged schematic diagram of the structure at point A of a heating component for heat sealing plastic packaging bags according to this utility model;

[0019] Figure 4 is an enlarged schematic diagram of section B of the heating component for heat sealing plastic packaging bags according to this utility model.

[0020] Reference numerals: 1. Mounting base; 2. Mounting groove; 3. Base; 4. Heating strip; 5. Collar; 6. First connecting groove; 7. First connecting mechanism; 701. Fixed seat; 702. First positioning pin; 703. Elastic cover plate; 704. First handle; 8. Second connecting groove; 9. Second connecting mechanism; 901. Movable seat; 902. Second positioning pin; 903. Telescopic rod; 904. Tension spring; 905. Second handle; 10. Guide seat; 11. Elastic top block; 12. Conductive connector. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0022] Referring to Figures 1-4, the heating assembly for heat-sealing plastic packaging bags in this embodiment includes a mounting base 1. The top of the mounting base 1 has a mounting groove 2 for limiting the installation of a heating strip 4. The heating strip 4 is detachably mounted on the top of the mounting groove 2. Both ends of the heating strip 4 are fixedly connected to collars 5. A base 3 is fixedly connected to the bottom of the mounting base 1. The side walls at both ends of the base 3 have a first connecting groove 6 and a second connecting groove 8, respectively. A first connecting mechanism 7 is provided inside the first connecting groove 6 for fixing one end of the heating strip 4. A second connecting mechanism 9 is provided inside the second connecting groove 8 for movably connecting the other end of the heating strip 4. The first connecting mechanism 7 includes a fixing seat 701, which is fixedly connected to the side wall of the first connecting groove 6. A first positioning pin 702 is vertically fixed on the top of the fixing seat 701 for positioning the fixed end of the heating strip 4. The first connecting mechanism 7 also includes an elastic cover plate 703. The cover plate 703 is slidably connected to the side wall of the fixed base 701; the top of the elastic cover plate 703 has a through hole, which is located directly above the first positioning pin 702; the side wall of the elastic cover plate 703 away from the base 3 is vertically fixedly connected to the first handle 704; the second connecting mechanism 9 includes a movable base 901, which is slidably connected to the bottom of the second connecting groove 8; the top of the movable base 901 is fixedly provided with the second positioning pin 902 for positioning the movable end of the heating strip 4; a telescopic rod 903 is connected between the movable base 901 and the side wall of the second connecting groove 8; a tension spring 904 is provided around the outside of the telescopic rod 903; the two ends of the tension spring 904 are fixedly connected to the side wall of the movable base 901 and the side wall of the second connecting groove 8, respectively; the second connecting mechanism 9 also includes a second handle 905, which is fixedly connected to the side wall of the movable base 901 away from the base 3; the top of the second positioning pin 902 is inclined toward the telescopic rod 903.In use, place the heating strip 4 into the mounting groove 2 at the top of the mounting base 1, then bend the heating strip 4 toward one end of the first connecting groove 6, so that the corresponding collar 5 extends into the interior of the first connecting groove 6. At this time, pull the first handle 704 upward to lift the elastic cover plate 703 at the top of the fixing base 701, so that the first positioning pin 702 is exposed. Then, put the collar 5 on the outside of the first positioning pin 702. Release the first handle 704 to reset the elastic cover plate 703, and fix the collar 5 on the outside of the first positioning pin 702, thereby fixing one end of the heating strip 4. Then bend the other end of the heating strip 4 so that the corresponding collar 5 enters the first connecting groove 6. Inside the second connecting groove 8, the second handle 905 is pulled away from the first connecting groove 6, causing the movable seat 901 and the second positioning pin 902 to move until the second positioning pin 902 moves to the bottom of the corresponding collar 5, so that the collar 5 inside the second connecting groove 8 is fitted onto the outside of the second positioning pin 902. At this time, the telescopic rod 903 extends and the tension spring 904 is stretched, generating a pulling force on the movable seat 901, so that the second positioning pin 902 generates a pulling force on the collar 5 outside it, thereby generating a pulling force on the movable end of the heating strip 4, so that the heating strip 4 always remains taut when deformed, preventing the heating strip 4 from loosening during the heating process and affecting the heat sealing effect.

[0023] A pair of guide seats 10 are symmetrically fixed on the upper and lower sides of the first connecting groove 6 and the second connecting groove 8 on the side away from the base 3. A pair of elastic top blocks 11 are symmetrically arranged between the opposing side walls of the guide seats 10. Conductive connectors 12 are fixedly connected to both side walls of the base 3. The elastic top blocks 11 are electrically connected to the conductive connectors 12. When the end of the heating strip 4 enters the first connecting groove 6 and the second connecting groove 8, it passes through the gap between the symmetrically arranged elastic top blocks 11, so that the heating strip 4 always abuts against the elastic top blocks 11 when it deforms due to thermal expansion and contraction, thereby preventing the heating strip 4 from being disconnected from the circuit during the heating process.

[0024] Working principle: In use, place the heating strip 4 in the mounting groove 2 on the top of the mounting base 1, then bend the heating strip 4 towards one end of the first connecting groove 6, so that the corresponding collar 5 extends into the interior of the first connecting groove 6. When the end of the heating strip 4 enters the first connecting groove 6, it passes through the gap between the symmetrically arranged elastic top blocks 11, so that the heating strip 4 always abuts against the elastic top blocks 11 when it deforms due to thermal expansion and contraction, thereby preventing the heating strip 4 from disconnecting from the circuit during heating. Then, pull the first handle 704 upward to lift the elastic cover plate 703 on the top of the fixing base 701, so that the first positioning pin 702 is exposed. Then, put the collar 5 on the outside of the first positioning pin 702. Release the first handle 704 to reset the elastic cover plate 703, and fix the collar 5 on the outside of the first positioning pin 702, thereby... One end of the heating strip 4 is fixed, and the other end of the heating strip 4 is bent so that the corresponding collar 5 enters the interior of the second connecting groove 8. The process of entering the second connecting groove 8 is the same as above. Then, the second handle 905 is pulled away from the first connecting groove 6, which causes the movable seat 901 and the second positioning pin 902 to move together until the second positioning pin 902 moves to the bottom of the corresponding collar 5. The collar 5 inside the second connecting groove 8 is fitted onto the outside of the second positioning pin 902. At this time, the telescopic rod 903 extends and the tension spring 904 is stretched, which generates a pulling force on the movable seat 901, so that the second positioning pin 902 generates a pulling force on the collar 5 outside, thereby generating a pulling force on the movable end of the heating strip 4. This ensures that the heating strip 4 remains taut during deformation, preventing the heating strip 4 from loosening during heating and affecting the heat sealing effect.

[0025] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A heating assembly for heat sealing plastic packaging bags, characterized in that: The device includes a mounting base (1), with a mounting groove (2) on its top. A heating strip (4) is detachably mounted on the top of the mounting groove (2). Both ends of the heating strip (4) are fixedly connected to collars (5). A base (3) is fixedly connected to the bottom of the mounting base (1). A first connecting groove (6) and a second connecting groove (8) are respectively provided on the side walls of both ends of the base (3). A first connecting mechanism (7) is provided inside the first connecting groove (6), and a second connecting mechanism (9) is provided inside the second connecting groove (8). The first connecting mechanism (7) includes a fixing seat (701), and the fixing seat (701) is connected to the first connecting mechanism (9). The side wall of the groove (6) is fixedly connected, and the top of the fixed seat (701) is vertically fixedly provided with a first positioning pin (702). The second connecting mechanism (9) includes a movable seat (901), which is slidably connected to the bottom of the second connecting groove (8). The top of the movable seat (901) is fixedly provided with a second positioning pin (902). A telescopic rod (903) is connected between the movable seat (901) and the side wall of the second connecting groove (8). A tension spring (904) is provided around the outside of the telescopic rod (903). The two ends of the tension spring (904) are fixedly connected to the side wall of the movable seat (901) and the side wall of the second connecting groove (8), respectively.

2. The heating assembly for heat sealing plastic packaging bags according to claim 1, characterized in that: The first connecting mechanism (7) further includes an elastic cover plate (703), which is slidably connected to the side wall of the fixed seat (701).

3. A heating assembly for heat sealing plastic packaging bags according to claim 2, characterized in that: The top of the elastic cover plate (703) has a through hole, which is located directly above the first positioning pin (702). The first handle (704) is vertically fixed to the side wall of the elastic cover plate (703) away from the base (3).

4. A heating assembly for heat sealing plastic packaging bags according to claim 1, characterized in that: The second connecting mechanism (9) also includes a second handle (905), which is fixedly connected to the side wall of the movable seat (901) away from the base (3).

5. A heating assembly for heat sealing plastic packaging bags according to claim 1, characterized in that: The top of the second positioning pin (902) is inclined toward the telescopic rod (903).

6. A heating assembly for heat sealing plastic packaging bags according to claim 1, characterized in that: A pair of guide seats (10) are symmetrically fixed on the upper and lower sides of the first connecting groove (6) and the second connecting groove (8) on the side away from the base (3). A pair of elastic top blocks (11) are symmetrically arranged between the opposing side walls of the guide seats (10). A conductive connector (12) is fixedly connected to both side walls of the base (3). The elastic top block (11) is electrically connected to the conductive connector (12).

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