quick-release double-layer constant temperature heat sealing mechanism for heat sealing machine

Abstract

This utility model provides a quick-release double-layer constant temperature heat sealing mechanism for a heat sealing machine. The technical solution includes a heating element and a heat sealing machine base. The heating element and the heat sealing machine base are detachably connected via push-blade bolts. The other side of the heat sealing machine base is fixedly connected to a stroke cylinder. A heating rod is embedded inside the heating element. The beneficial effects of this utility model are: (1) improved ease of disassembly and assembly, reducing downtime losses; (2) optimized heating stability, extending the maintenance cycle; (3) precise temperature control to prevent fluctuations and avoid sealing defects; (4) enhanced heat sealing adhesion, ensuring sealing quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat sealing machine accessories, and in particular relates to a quick-release double-layer constant temperature heat sealing mechanism for heat sealing machines. Background Technology

[0002] In the packaging machinery field, heat sealing machines are the core equipment for heat sealing the inner film of box-type products, and the performance of their heat sealing mechanism directly affects production efficiency and sealing quality. Currently, traditional heat sealing mechanisms generally use multiple hexagonal head screws for fixing, which has serious defects under long-term high-temperature conditions: First, the thermal expansion effect of metal causes plastic deformation between the screw and the threaded hole, making it easy for the threads to seize or even break during disassembly; second, the traditional screw fixing method requires unscrewing multiple fasteners to replace the heating component, causing significant downtime losses in continuous production scenarios.

[0003] Meanwhile, mainstream heat sealing machines generally use heating wires as the heat source, sealing the inner film strip by resistance heating. However, this method has several problems in practical applications: First, the heating wires have a short lifespan due to high-frequency start-stop and high-temperature oxidation, requiring frequent replacement and resulting in high maintenance costs. Second, the resistance value changes non-linearly due to the aging of the heating wires, and existing temperature control systems cannot compensate for this in real time due to thermocouple response delays (2-3 seconds), causing sealing temperature fluctuations exceeding ±10℃, which can easily lead to leaks or carbonization. Third, the linearly arranged heating wires have high thermal inertia, resulting in significant temperature differences between adjacent areas, causing serrated edges on the seal and severely affecting sealing quality. Therefore, there is an urgent need for a new type of heat sealing mechanism that is long-lasting, weather-resistant, has a fast response, provides a uniform temperature field, and is easy to maintain, in order to meet the higher requirements of intelligent production lines for efficiency, cost, and quality. Summary of the Invention

[0004] To address the problems in the prior art, this utility model provides a quick-release double-layer constant temperature heat sealing mechanism for a heat sealing machine. The technical solution includes a heating element and a heat sealing machine base. The heating element and the heat sealing machine base are detachably connected by a pusher bolt. The other side of the heat sealing machine base is fixedly connected to a stroke cylinder. A heating rod is embedded inside the heating element.

[0005] In a preferred embodiment, the heating element is a concave long rail structure with a symmetrical double-rail groove structure on its working surface, and is covered with high-temperature adhesive tape.

[0006] In a preferred embodiment, the heating element is further provided with a temperature sensor, which is used to monitor the temperature of the heating element and the heating rod.

[0007] In a preferred embodiment, the working face of the heating element is provided with a heating base.

[0008] In a preferred embodiment, the heating base is provided with a sponge pad, which faces the working surface of the heating element.

[0009] In a preferred embodiment, the pusher bolt includes a screw, a crank, an anti-slip nut, a first washer, and a second washer. Several first through holes are formed on the side wall of the heating element, and several second through holes are formed on the side wall of the heat sealing machine base. The first through holes and the second through holes are connected one by one to form a through hole for the pusher bolt to pass through. The screw of the pusher bolt is placed in the through hole. One end of the screw is hinged to the crank. The body of the screw is threadedly connected to the anti-slip nut. A movable first washer and a second washer are also fitted on the body of the screw. The first washer and the second washer are respectively located on both sides of the screw.

[0010] In a preferred embodiment, the heating rod is fixed to the heating body by at least two set screws.

[0011] The beneficial effects of this utility model are: (1) The use of pusher bolts instead of traditional multi-set internal hexagon screws avoids the problem of thread seizing and breakage caused by metal thermal expansion at high temperature; the heating element and the heat sealing machine base are connected by through holes and the pusher bolts are installed in a detachable structure. There is no need to unscrew the fasteners one by one. The heating element can be quickly disassembled and assembled by simply operating the pusher bolts, which greatly shortens the downtime for replacing heating components and meets the efficiency requirements of continuous production scenarios. (2) The heating rod replaces the traditional heating wire as the heat source. The heating rod structure is more stable and has stronger resistance to high temperature oxidation and high frequency start-stop loss, which effectively extends the service life of the heating components and reduces the maintenance cost of frequent heat source replacement. At the same time, the heating rod is fixed to the heating body by at least two set screws, which is firmly installed and not easy to move. This avoids the thermal field shift caused by the loosening of the heating components, further ensuring the heating stability. Moreover, the fixing method of the set screws is quick to install and remove, which also shortens the downtime for replacing the heating components. (3) The temperature sensor installed on the heating body can monitor the temperature of the heating body and heating rod in real time, and promptly report and adjust the temperature changes, avoiding large temperature fluctuations caused by response delay in traditional temperature control systems, preventing leaks or carbonization of the seal; the double-rail groove working surface of the concave long rail of the heating body, combined with the high-temperature adhesive cloth covering the surface, can form a uniform heat field, reduce the temperature difference between adjacent areas, avoid serrated edges on the seal, and improve the flatness and consistency of the seal; (4) The heating base with the working face of the heating element has a sponge pad on its surface that can provide flexible cushioning during heat sealing, so that the working surface of the heating element fits more tightly with the film to be sealed, reducing local leakage caused by uneven pressure; at the same time, the sponge pad can also relieve the rigid impact during heat sealing, protect the heating element and the inner film, further reduce the sealing defect rate, and improve the sealing performance of the product. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a front perspective view of the present invention.

[0014] In the diagram: 1. Heating element; 2. Heat sealing machine base; 3. Pusher bolt; 301. Screw; 302. Crank; 303. Anti-slip nut; 304. First washer; 305. Second washer; 4. Heating rod; 5. Set screw; 6. High-temperature adhesive tape; 7. Temperature sensor; 8. First through hole; 9. Second through hole; 10. Heating base; 11. Sponge pad. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Example like Figure 1-2 The quick-release double-layer constant temperature heat sealing mechanism shown includes a heating body 1 and a heat sealing machine base 2. The heating body 1 and the heat sealing machine base 2 are detachably connected by a pusher bolt 3. The other side of the heat sealing machine base 2 is fixedly connected to the stroke cylinder by bolts. A heating rod 4 is embedded inside the heating body 1.

[0017] Furthermore, the heating element 1 has a concave long rail structure, and its working surface has a symmetrical double rail groove structure, with high-temperature adhesive tape 6 covering the working surface.

[0018] Furthermore, the heating element 1 is also equipped with a temperature sensor 7, which is used to monitor the temperature of the heating element 1 and the heating rod 4.

[0019] Furthermore, a heating base 10 is provided on the working face of the heating element 1.

[0020] Furthermore, the heating base 10 is provided with a sponge pad 11, which faces the working surface of the heating body 1.

[0021] Furthermore, the pusher bolt 3 includes a screw 301, a crank 302, an anti-slip nut 303, a first washer 304, and a second washer 305. The side wall of the heating body 1 is provided with several first through holes 8, and the side wall of the heat sealing machine base 2 is provided with several second through holes 9. The first through holes 9 and the second through holes 10 are connected one by one to form through holes for the pusher bolt 3 to pass through. The screw 301 of the pusher bolt 3 is placed in the through hole. One end of the screw 301 is hinged to the crank 302. The rod body of the screw 301 is threadedly connected to the anti-slip nut 303. The rod body is also fitted with a movable first washer 304 and a second washer 305. The first washer 304 and the second washer 305 are respectively provided on both sides of the screw 301.

[0022] Furthermore, the heating rod 4 is fixed inside the heating body 1 by at least two set screws 5.

[0023] The operation process of the above-mentioned device is as follows: (1) Installation of the device: Align the first through hole 8 on the side wall of the heating body 1 with the second through hole 9 on the side wall of the heat sealing machine base 2 to form a through bolt passage; insert the screw 301 of the pusher bolt 3 into one end of the passage, and put the movable first washer 304 (close to the side of the heating body) and the second washer 305 (close to the side of the heat sealing machine base) on both sides of the rod body respectively, tighten the anti-slip nut 303 until it is 80-90% tight so that the washer fits against the side wall of the component, and finally press down the crank 302 to complete the fixing of the heating body 1 and the heat sealing machine base 2; The heating rod 4 is embedded into the pre-set mounting groove inside the heating body 1, and is tightened radially along the side wall of the heating body 1 by at least two set screws 5. The ends of the set screws 5 are pressed against the outer wall of the heating rod 4 to ensure that the heating rod 4 does not loosen or shift.

[0024] (2) Usage process: When the power supply of heating rod 4 is turned on, heating rod 4 heats up through resistance and transfers the heat to heating body 1 (the heating rod is a solid metal structure with uniform heat conduction and low thermal inertia); at the same time, temperature sensor 7 collects the surface temperature of the working surface of the heating body in real time and transmits the data to the temperature control system.

[0025] When the stroke cylinder is activated, the piston rod extends downward, causing the heat sealing machine base 2 and the heating body 1 to descend vertically in sync until the double-track groove working surface of the heating body 1 (covered with high-temperature adhesive tape 6) is completely in contact with the inner film tape and sponge pad 11 on the heating base 10.

[0026] The sponge pad plays a flexible buffering role during this process. It is compressed and deformed by the pressure of the heating element 1, so that the contact area between the high-temperature adhesive tape and the inner membrane tape changes from line contact to uniform surface contact, avoiding leakage caused by insufficient local pressure; at the same time, it buffers the rigid impact between the heating element 1 and the base, protecting the inner membrane tape from being crushed and the working surface of the heating element 1 from being worn.

[0027] Temperature transfer path: heating rod → heating body → double-track groove working surface → high-temperature adhesive tape → inner membrane belt heat sealing area. The high-temperature adhesive tape not only avoids direct adhesion between the heating body and the inner membrane belt, but also can transfer heat evenly. Combined with the symmetrical thermal field design of the double-track groove, it eliminates the problem of large temperature difference between adjacent areas caused by the linear arrangement of traditional heating wires.

[0028] While maintaining the fit, the inner film with the heat-sealed area completes heat melting and curing under constant temperature heating; then the piston rod of the stroke cylinder retracts upward, driving the heating body 1 to return to the initial height, and the heat-sealed finished product on the heating base 10 can be directly removed, and a single heat-sealing operation is completed.

[0029] (3) Component replacement: Quickly disassemble the heating element, loosen the anti-slip nut 303 of the pusher bolt 3, rotate the crank 302 to drive the screw 301 out of the through hole, at this time the fixed relationship between the heating element 1 and the heat sealing machine base 2 is released, and the heating element 1 can be directly removed from the base; To replace or maintain the heating rod 4, loosen the set screw 5 on the side wall of the heating body 1. After the set screw 5 is removed from the outer wall of the heating rod 4, the heating rod 4 can be removed from the mounting slot. After cleaning the inside of the heating body 1, insert the heating rod 4 and tighten the set screw 5 to complete the fixation.

Claims

1. A double layer constant temperature heat sealing mechanism of a heat sealer quick release type, characterized by, It includes a heating element (1) and a heat sealing machine base (2). The heating element (1) and the heat sealing machine base (2) are detachably connected by a pusher bolt (3). The other side of the heat sealing machine base (2) is fixedly connected to a stroke cylinder. A heating rod (4) is embedded inside the heating element (1).

2. The quick release type double layer thermostatic heat sealing mechanism of the heat sealer according to claim 1, characterized in that, The heating element (1) is a concave long rail structure with a symmetrical double rail groove structure on its working surface, and is covered with high-temperature adhesive tape (6).

3. The quick release double layer thermostatic heat sealing mechanism of the heat sealer according to claim 1, wherein, The heating element (1) is also equipped with a temperature sensor (7), which is used to monitor the temperature of the heating element (1) and the heating rod (4).

4. The quick release double layer thermostatic heat sealing mechanism of the heat sealer according to claim 1, wherein, The heating element (1) has a heating base (10) on its working face.

5. The quick release double layer thermostatic heat sealing mechanism of the heat sealer according to claim 4, wherein, The heating base (10) is provided with a sponge pad (11), which faces the working surface of the heating body (1).

6. The quick release double layer thermostatic heat sealing mechanism of the heat sealer according to claim 1, wherein, The pusher bolt (3) includes a screw (301), a crank (302), an anti-slip nut (303), a first washer (304), and a second washer (305). The side wall of the heating body (1) is provided with several first through holes (8), and the side wall of the heat sealing machine base (2) is provided with several second through holes (9). The first through holes (9) and the second through holes (10) are connected one by one to form through holes for the pusher bolt (3) to pass through. The screw (301) of the pusher bolt (3) is placed in the through hole. One end of the screw (301) is hinged to the crank (302). The rod body of the screw (301) is threadedly connected to the anti-slip nut (303). The rod body is also fitted with a movable first washer (304) and a second washer (305). The first washer (304) and the second washer (305) are respectively provided on both sides of the screw (301).

7. The quick release double layer thermostatic heat sealing mechanism of the heat sealer according to claim 1, wherein, The heating rod (4) is fixed inside the heating body (1) by at least two set screws (5).

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