Heat sealing structure of degradable PLA (polylactic acid) composite packaging bag
By combining the lifting and heat-sealing components, the problem of synchronous closure of the heat-sealing plate is solved, achieving precise heat sealing and airtightness of biodegradable PLA composite packaging bags, adapting to the heat sealing needs of different packaging bags, and improving sealing and degradation performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-04-14
AI Technical Summary
In the existing heat-sealing structure of biodegradable PLA composite packaging bags, the drive system, such as cylinders or servo motors, does not use closed-loop control, which makes it easy for the movement trajectory of the heat-sealing plate to deviate, making it impossible to guarantee complete synchronous closure and affecting sealing performance and degradation performance.
The design employs a combination of lifting and heat-sealing components, including a first motor for the lifting component and a second motor for the heat-sealing component. The synchronous movement of the first and second heat-sealing plates is achieved through a rotating and sliding structure. Combined with the height adjustment of the elastic structure, this ensures precise alignment of the heat-sealing plates and adapts to the heat-sealing requirements of different packaging bags.
It achieves precise docking and synchronous movement of heat-sealed plates, improves sealing and degradation performance, adapts to the heat-sealing requirements of different packaging bags, and ensures the sealing and environmental friendliness of packaging bags.
Smart Images
Figure CN224116884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of biodegradable PLA composite packaging bag technology, specifically to the heat-sealing structure of biodegradable PLA composite packaging bags. Background Technology
[0002] The heat-sealing structure of biodegradable PLA composite packaging bags is crucial for ensuring the bag's airtightness and functionality. This structure typically consists of heat-sealing components, including heating elements and pressing parts. The heating elements utilize high-efficiency heating wires, rapidly heating to the appropriate temperature to ensure the PLA material fully melts during heat sealing. The pressing parts are ingeniously designed with uniform pressure distribution, allowing the molten PLA material to bond tightly, forming a strong heat seal. This heat-sealing structure also features a precise temperature and pressure control system, which can be accurately adjusted according to the characteristics of the PLA material, ensuring stable and reliable heat sealing quality. In practical applications, this heat-sealing structure gives the PLA composite packaging bag excellent sealing performance after heat sealing, effectively preventing leakage of contents while maintaining a clean appearance. Furthermore, because PLA is biodegradable, packaging bags made with this heat-sealing structure can rapidly degrade in the natural environment after fulfilling their packaging purpose, making them environmentally friendly.
[0003] In the existing heat-sealing structure of biodegradable PLA composite packaging bags, if the drive system, such as a cylinder or servo motor, does not use closed-loop control, the movement trajectory of the two heat-sealing plates is prone to deviation, making it impossible to guarantee completely synchronous closure. Therefore, we need a heat-sealing structure for biodegradable PLA composite packaging bags. Utility Model Content
[0004] The purpose of this invention is to provide a heat-sealing structure for biodegradable PLA composite packaging bags to solve the existing problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat-sealing structure for a biodegradable PLA composite packaging bag, comprising a base, a lifting assembly on the top of the base, and a heat-sealing assembly on the top of the lifting assembly; the heat-sealing assembly includes a placement plate, a second motor fixedly connected inside the placement plate, a connecting plate fixedly connected to the output end of the second motor, a first connecting rod movably connected to the top of the connecting plate, a first heat-sealing plate movably connected to one end of the first connecting rod, a sliding rod fixedly connected to one side of the first heat-sealing plate, a second connecting rod movably connected to the other side of the connecting plate, a sliding seat movably connected to one end of the second connecting rod, a moving rod fixedly connected to one side of the sliding seat, and a second heat-sealing plate fixedly connected to one end of the moving rod.
[0006] Preferably, the second motor forms a rotating structure with the first connecting rod via a connecting plate, and the top of the connecting plate is movably connected to one end of the first connecting rod, while the other end of the first connecting rod is movably connected to the first heat-sealed plate.
[0007] Preferably, the slide and the moving rod form a fixed structure, and the inner wall of the slide is fixed to the outer wall of the moving rod, and the other end of the moving rod is fixed to the second heat-sealed plate.
[0008] Preferably, the first heat-sealed plate forms a sliding structure with the placement plate via a slide rod, and one end of the slide rod is fixed to the first heat-sealed plate, and the outer wall of the slide rod is slidably connected to the interior of the placement plate.
[0009] Preferably, the lifting assembly includes a mounting base, a first motor is fixedly connected to the top of the mounting base, a turntable is fixedly connected to the output end of the first motor, a movable rod is movably connected to the top of the turntable, a support frame is movably connected to the top of the movable rod, a support sleeve is fixedly connected to the top of the base, a spring is provided inside the support sleeve, and a support rod is fixedly connected to the top of the spring.
[0010] Preferably, the first motor forms a rotating structure through a turntable and a movable rod, with one side of the turntable being movably connected to one end of the movable rod, and the top of the movable rod being movably connected to the interior of the support frame.
[0011] Preferably, the support sleeve forms an elastic structure with a spring and a support rod, and the bottom of the spring is fixed to the inner bottom wall of the support sleeve, and the top of the spring is fixed to the bottom of the support rod.
[0012] Compared with the prior art, the beneficial effects of this utility model are: the heat-sealing structure of the biodegradable PLA composite packaging bag,
[0013] (1) By starting the second motor, the second motor can drive the connecting plate to rotate, which can drive the first connecting rod to rotate, which can push the first heat-sealed plate to move, which can allow the first heat-sealed plate to slide stably along the placement plate under the support of the slide rod. At the same time, the connecting plate drives the second connecting rod to move, which can drive the moving rod on the slide to move, which can drive the second heat-sealed plate to move synchronously, which can allow the first heat-sealed plate and the second heat-sealed plate to perform heat-sealing processing on the packaging bag.
[0014] (2) By starting the first motor, the first motor can drive the turntable to rotate, which can drive the movable rod to move, which can drive the support frame to move, and the support frame can slide along the support sleeve by relying on the bottom support rod. Thus, under the support of the spring, the height of the heat sealing mechanism can be adjusted, and the heat sealing processing needs of different packaging bags can be met in daily life. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;
[0016] Figure 2 This is a schematic diagram of the heat-sealing component structure of this utility model;
[0017] Figure 3 This is a schematic diagram of the lifting component structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the first heat-sealed plate and the second heat-sealed plate of this utility model.
[0019] In the diagram: 1. Base; 2. Lifting assembly; 201. Mounting seat; 202. First motor; 203. Turntable; 204. Movable rod; 205. Support sleeve; 206. Spring; 207. Support rod; 208. Support frame; 3. Heat sealing assembly; 301. Placement plate; 302. Second motor; 303. Connecting plate; 304. First connecting rod; 305. First heat sealing plate; 306. Slide rod; 307. Second connecting rod; 308. Slide seat; 309. Moving rod; 310. Second heat sealing plate. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] This utility model embodiment provides a heat-sealing structure for a biodegradable PLA composite packaging bag, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the system includes a base 1, a lifting assembly 2 on top of the base 1, and a heat-sealing assembly 3 on top of the lifting assembly 2. The heat-sealing assembly 3 includes a placement plate 301, a second motor 302 fixedly connected inside the placement plate 301, a connecting plate 303 fixedly connected to the output end of the second motor 302, a first connecting rod 304 movably connected to the top of the connecting plate 303, and a first heat-sealing plate 305 movably connected to one end of the first connecting rod 304. The second motor 302 and the first connecting rod 304 form a rotating structure through the connecting plate 303, and the top of the connecting plate 303 is movably connected to one end of the first connecting rod 304, while the other end of the first connecting rod 304 is connected to the first heat-sealing plate 305. The movable connection enhances the connection between the second motor 302 and the connecting plate 303, allowing the second motor 302 to drive the connecting plate 303, which in turn drives the first connecting rod 304 to move the first heat-sealed plate 305. A slide rod 306 is fixedly connected to one side of the first heat-sealed plate 305, and a second connecting rod 307 is movably connected to the other side of the connecting plate 303. One end of the second connecting rod 307 is movably connected to a slide block 308, and a moving rod 309 is fixedly connected to one side of the slide block 308. The slide block 308 and the moving rod 309 form a fixed structure, with the inner wall of the slide block 308 fixed to the outer wall of the moving rod 309, and the other end of the moving rod 309 fixed to the second heat-sealed plate 310, thus strengthening the connection. The connection between the slide block 308 and the moving rod 309 is improved, allowing the slide block 308 to move the second heat-sealed plate 310 by driving the moving rod 309. One end of the moving rod 309 is fixedly connected to the second heat-sealed plate 310. The first heat-sealed plate 305 forms a sliding structure with the placement plate 301 through the slide rod 306, and one end of the slide rod 306 is fixed to the first heat-sealed plate 305. The outer wall of the slide rod 306 is slidably connected to the interior of the placement plate 301, strengthening the connection between the slide rod 306 and the placement plate 301. This allows the first heat-sealed plate 305 to slide stably within the placement plate 301 with the support of the slide rod 306. By starting the second motor 302, the second heat-sealed plate 305 can move. The second motor 302 drives the connecting plate 303 to rotate, which in turn drives the first connecting rod 304 to rotate. The first connecting rod 304 then pushes the first heat-sealed plate 305 to move, allowing the first heat-sealed plate 305 to slide stably along the placement plate 301 with the support of the slide rod 306. Simultaneously, the connecting plate 303 drives the second connecting rod 307 to move, which in turn drives the moving rod 309 on the slide block 308 to move. The moving rod 309 then drives the second heat-sealed plate 310 to move synchronously, allowing the first heat-sealed plate 305 and the second heat-sealed plate 310 to perform heat-sealing processing on the packaging bag.
[0022] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the lifting assembly 2 includes a mounting base 201. A first motor 202 is fixedly connected to the top of the mounting base 201. A turntable 203 is fixedly connected to the output end of the first motor 202. A movable rod 204 is movably connected to the top of the turntable 203. The first motor 202 and the movable rod 204 form a rotating structure through the turntable 203. One side of the turntable 203 is movably connected to one end of the movable rod 204, and the top of the movable rod 204 is movably connected to the inside of the support frame 208, which strengthens the connection between the first motor 202 and the turntable 203. This allows the first motor 202 to move the movable rod 204 by driving the turntable 203. The top of the movable rod 204 is movably connected to the support frame 208. A support sleeve 205 is fixedly connected to the top of the base 1. A spring 206 is installed inside the support sleeve 205. A support rod 207 is fixedly connected to the top of the spring 206. 205 forms an elastic structure with spring 206 and support rod 207. The bottom of spring 206 is fixed to the inner bottom wall of support sleeve 205, and the top of spring 206 is fixed to the bottom of support rod 207, which strengthens the connection between support sleeve 205 and support rod 207. Spring 206 can position and support support rod 207 with the support of support sleeve 205. When the first motor 202 is started, the turntable 203 is rotated, which in turn drives the movable rod 204 to move. Movable rod 204 can drive support frame 208 to move, and support frame 208 can slide along support sleeve 205 with bottom support rod 207. With the support of spring 206, the height of heat sealing mechanism can be adjusted, which can meet the daily heat sealing needs of different packaging bags.
[0023] Working principle: By starting the first motor 202, the turntable 203 rotates, which in turn moves the movable rod 204. The movable rod 204 then moves the support frame 208, allowing the support frame 208 to slide along the support sleeve 205 via the bottom support rod 207. Supported by the spring 206, the height of the heat-sealing mechanism can be adjusted, meeting the daily heat-sealing needs of different packaging bags. Furthermore, by starting the second motor 302, the connecting plate 303 rotates. The connecting plate 303 can drive the first connecting rod 304 to rotate, which in turn allows the first connecting rod 304 to push the first heat-sealed plate 305 to move. The first heat-sealed plate 305 can then slide stably along the placement plate 301 with the support of the slide rod 306. Simultaneously, the connecting plate 303 drives the second connecting rod 307 to move, which in turn drives the moving rod 309 on the slide block 308 to move. The moving rod 309 can then drive the second heat-sealed plate 310 to move synchronously, allowing the first heat-sealed plate 305 and the second heat-sealed plate 310 to perform heat-sealing processing on the packaging bag.
[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A heat-sealing structure for a biodegradable PLA composite packaging bag, comprising a base (1), characterized in that: The top of the base (1) is provided with a lifting component (2), and the top of the lifting component (2) is provided with a heat sealing component (3). The heat sealing assembly (3) includes a placement plate (301), a second motor (302) is fixedly connected inside the placement plate (301), a connecting plate (303) is fixedly connected to the output end of the second motor (302), a first connecting rod (304) is movably connected to the top of the connecting plate (303), a first heat sealing plate (305) is movably connected to one end of the first connecting rod (304), a slide rod (306) is fixedly connected to one side of the first heat sealing plate (305), a second connecting rod (307) is movably connected to the other side of the connecting plate (303), a slide block (308) is movably connected to one end of the second connecting rod (307), a moving rod (309) is fixedly connected to one side of the slide block (308), and a second heat sealing plate (310) is fixedly connected to one end of the moving rod (309).
2. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 1, characterized in that: The second motor (302) forms a rotating structure with the first connecting rod (304) through the connecting plate (303), and the top of the connecting plate (303) is movably connected to one end of the first connecting rod (304), and the other end of the first connecting rod (304) is movably connected to the first heat-sealed plate (305).
3. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 1, characterized in that: The slide (308) and the moving rod (309) form a fixed structure, and the inner wall of the slide (308) is fixed to the outer wall of the moving rod (309), and the other end of the moving rod (309) is fixed to the second heat-sealed plate (310).
4. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 1, characterized in that: The first heat-sealed plate (305) forms a sliding structure with the placement plate (301) through the slide rod (306), and one end of the slide rod (306) is fixed to the first heat-sealed plate (305), and the outer wall of the slide rod (306) is slidably connected to the interior of the placement plate (301).
5. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 1, characterized in that: The lifting assembly (2) includes a mounting base (201), a first motor (202) is fixedly connected to the top of the mounting base (201), a turntable (203) is fixedly connected to the output end of the first motor (202), a movable rod (204) is movably connected to the top of the turntable (203), a support frame (208) is movably connected to the top of the movable rod (204), a support sleeve (205) is fixedly connected to the top of the base (1), a spring (206) is provided inside the support sleeve (205), and a support rod (207) is fixedly connected to the top of the spring (206).
6. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 5, characterized in that: The first motor (202) forms a rotating structure with the turntable (203) and the movable rod (204), and one side of the turntable (203) is movably connected to one end of the movable rod (204), and the top of the movable rod (204) is movably connected to the inside of the support frame (208).
7. The heat-sealing structure of the biodegradable PLA composite packaging bag according to claim 5, characterized in that: The support sleeve (205) forms an elastic structure with the support rod (207) via the spring (206), and the bottom of the spring (206) is fixed to the inner bottom wall of the support sleeve (205), and the top of the spring (206) is fixed to the bottom of the support rod (207).