Sealing device for packaging bag processing equipment

By using an eccentric wheel and a heating block driven by a reciprocating motor, the problem of wrinkles and misalignment at the sealing point during the sealing process is solved, achieving efficient and reliable sealing of packaging bags and improving the stability and safety of the device.

CN224241429UActive Publication Date: 2026-05-15TONGCHENG WANFANG PAPER&PLASTIC PACKAGING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TONGCHENG WANFANG PAPER&PLASTIC PACKAGING CO LTD
Filing Date
2025-05-26
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing sealing devices lack a leveling function during the sealing process, which can easily lead to wrinkles or misalignment at the sealing point of the packaging bag. Furthermore, high-temperature heating may damage the packaging material or cause burns to personnel.

Method used

The heating block design, driven by an eccentric wheel and a reciprocating motor, transports the packaging bag to the sealing position via a conveyor belt. Driven by the eccentric wheel and the reciprocating motor, the heating block presses against the packaging bag, melting the bag opening and rapidly cooling and solidifying it. Combining mechanical motion with heat sealing technology, it achieves efficient and reliable sealing.

Benefits of technology

It achieves high efficiency and reliability in sealing packaging bags, avoids wrinkles and misalignment at the sealing point, improves the stability and durability of the sealing device, and ensures sealing quality and safety.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224241429U_ABST
Patent Text Reader

Abstract

The utility model provides a sealing device for packaging bag processing equipment, which relates to the technical field of packaging bag processing equipment and comprises a support column, a cover plate, a conveyor belt and a support, the cover plate is fixedly mounted at the top end of the support column, the conveyor belt is fixedly mounted at the center of the bottom end of the cover plate, and the conveyor belt is positioned at the middle end of the support column. Two fixing rods are fixedly installed at the top ends of the inner walls of the two sides of the supporting column, connecting rods are fixedly connected to the tail ends of the two sides of the fixing rods, eccentric wheels are connected to the centers of the connecting rods in a sleeving mode, reciprocating motors are fixedly connected to the bottom ends of the eccentric wheels, and the output ends of the reciprocating motors are connected with the bottom ends of the eccentric wheels; two stop levers are movably installed at the middle ends of the multiple grabbing clamps and extend to the tail end of the conveying belt from the front end of the conveying belt. Therefore, the heating block can be quickly separated from the packaging bag after sealing is completed, the sealing part can be quickly cooled and shaped, and the sealing time of the packaging bag is shortened.
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Description

Technical Field

[0001] This utility model relates to the field of packaging bag processing equipment technology, and in particular to a sealing device for packaging bag processing equipment. Background Technology

[0002] Currently, packaging bag sealing devices are widely used in various industries such as food, pharmaceuticals, chemicals, and daily necessities. Their core function is to seal packaging bags through heat sealing, vacuum sealing, and mechanical sealing. Common sealing devices include heat sealing machines, vacuum sealing machines, and external vacuum sealing machines. These devices can effectively prevent packaging materials from getting damp, oxidized, or contaminated, while extending the shelf life of products. Sealing devices can adapt to packaging bags of different materials, sizes, and shapes to meet diverse needs.

[0003] However, with the development of the packaging industry, existing sealing devices still have some problems. Some sealing equipment lacks the function of leveling the sealing area during the sealing process, which can easily lead to wrinkles or displacement at the sealing point of the packaging bag, affecting the sealing quality and efficiency. The sealing process involves high-temperature heating, and improper operation may damage the packaging materials or cause burns to personnel.

[0004] In summary, we propose a sealing device for packaging bag processing equipment. The device involves placing materials on a conveyor belt and securing them with grippers. A conveyor motor drives the belt to transport the packaging bag to the sealing position. A reciprocating motor then starts, causing an eccentric wheel to reciprocate, driving a heating block to press against the packaging bag. The heating block melts and seals the sealing area of ​​the bag, quickly removing itself after sealing. The sealed area then cools and solidifies. The sealed bag continues to be transported along the conveyor belt to the next process. Furthermore, the multiple support structures significantly improve the stability and durability of the sealing device. The combination of mechanical motion and heat sealing technology between the eccentric wheel and the heating block connected to the reciprocating motor achieves efficient and reliable packaging bag sealing. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a sealing device for packaging bag processing equipment, which more accurately solves the problem of the heating block quickly leaving the packaging bag after completing the sealing action and allowing the sealed area to cool and solidify rapidly.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes a sealing device for packaging bag processing equipment, including a support column, a cover plate, a conveyor belt, and a bracket. The cover plate is fixedly installed at the top of the support column, and the conveyor belt is fixedly installed at the center of the bottom end of the cover plate. The conveyor belt is located at the middle of the support column.

[0008] Two fixing rods are fixedly installed on the top of the inner walls on both sides of the support column. Connecting rods are fixedly connected to the tail ends of the two sides of the fixing rods. An eccentric wheel is sleeved at the center of the connecting rod. A reciprocating motor is fixedly connected to the bottom end of the eccentric wheel. The output end of the reciprocating motor is connected to the bottom end of the eccentric wheel.

[0009] Furthermore, the support column includes a cover plate disposed at the middle of the top end, the cover plate being fixedly connected to the middle position of the top end of the support columns on both sides, and a conveyor belt being installed at the middle of the bottom end of the support column, with multiple grippers fixedly installed on both sides of the conveyor belt.

[0010] Furthermore, two stop bars are movably installed at the middle of the plurality of grippers, the stop bars extending from the front end of the conveyor belt to the rear end of the conveyor belt.

[0011] Furthermore, a conveyor motor is fixedly installed on one side of the tail end of the conveyor belt.

[0012] Furthermore, a device housing is fixedly connected to one side of the fixing rod, and a connecting rod is fixedly connected to the top of one side of the device housing.

[0013] Furthermore, two heating blocks are movably connected to the middle end of the fixing rod, and a packaging bag is movably installed inside the heating blocks.

[0014] Furthermore, the packaging bag is located in the middle of the conveyor belt and at the center of the two baffles.

[0015] Furthermore, multiple supports are fixedly installed at the bottom end of the conveyor belt.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model features an eccentric wheel connected to the center of a connecting rod and a reciprocating motor. Two heating blocks are movably connected to the middle of a fixed rod. Each heating block contains an electric heating element, which heats up rapidly upon power-on. When the packaging bag is conveyed to the sealing position inside the heating block via a conveyor belt, the heating block, driven by the eccentric wheel and the reciprocating motor, presses against the packaging bag, melting and solidifying the plastic material at the bag opening. After sealing, the heating block quickly leaves the packaging bag, allowing the sealed area to cool and solidify rapidly. The eccentric structure of the eccentric wheel causes the connected connecting rod or push rod to reciprocate up and down or left and right. This reciprocating motion of the eccentric wheel allows the packaging bag to periodically press against the heating block, completing the sealing action. By adjusting the speed of the reciprocating motor and the eccentricity of the eccentric wheel, the pressure and sealing time of the heating block can be controlled. The heating time of the heating block is precisely the time it takes for the conveyor belt to convey the packaging bag to the sealing position of the heating block.

[0018] 2. This utility model places the material on a conveyor belt and fixes it with a gripper. The conveyor motor drives the conveyor belt to move and transport the packaging bag to the sealing position. The reciprocating motor starts, and the eccentric wheel generates reciprocating motion, driving the heating block to press against the packaging bag. The heating block 12 melts and seals the sealing part of the packaging bag. After sealing, it quickly moves away, and the sealed part cools and sets. The sealed packaging bag continues to be transported along the conveyor belt to the next process. The multiple support design greatly improves the stability and durability of the sealing device. The heating block connected to the eccentric wheel and the reciprocating motor achieves efficient and reliable packaging bag sealing function through the combination of mechanical motion and heat sealing technology. Attached Figure Description

[0019] Figure 1 This is an exploded view of the overall structure of this utility model;

[0020] Figure 2 This is a front elevation view of the stop bar at the middle of the conveyor belt and gripper of this utility model;

[0021] Figure 3 This is a schematic diagram of the fixing rod, eccentric wheel, heating block, and packaging bag nodes of this utility model;

[0022] Figure 4 This is a schematic diagram of the reciprocating motor at the bottom of the eccentric wheel and the packaging bag node inside the heating block on one side of the present invention.

[0023] The attached figures are labeled as follows:

[0024] 1. Support column; 2. Cover plate; 3. Conveyor belt; 4. Gripper; 5. Stop bar; 6. Conveyor motor; 7. Fixing rod; 8. Equipment shell; 9. Connecting rod; 10. Eccentric wheel; 11. Reciprocating motor; 12. Heating block; 13. Packaging bag; 14. Bracket. Detailed Implementation

[0025] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0026] Please refer to Figures 1-4 This utility model proposes a sealing device for packaging bag processing equipment, including a support column 1, a cover plate 2, a conveyor belt 3, and a bracket 14. The cover plate 2 is fixedly installed at the top of the support column 1, and the conveyor belt 3 is fixedly installed at the center of the bottom end of the cover plate 2. The conveyor belt 3 is located at the middle of the support column 1, and the bracket 14 is fixedly connected to the bottom end of the conveyor belt 3.

[0027] The support column 1 includes a cover plate 2 located at the top center, which is fixedly connected to the top center of the support column 1 on both sides. A conveyor belt 3 is installed at the bottom center of the support column 1. Multiple grippers 4 are fixedly connected to both sides of the conveyor belt 3. The grippers 4 are used to fix the material during the conveying process, preventing the material from sliding, tipping, or shifting on the conveyor belt 3. This is especially important for irregularly shaped or easily rolling items, ensuring that the material maintains a stable position on the conveyor belt 3. The grippers 4 can precisely control the conveying position and direction of the material. Especially when the material needs to be conveyed to a specific location for subsequent processing or packaging, it can realize automatic gripping and release of the material, improving production efficiency and reducing manual intervention. Two baffles 5 are movably installed at the middle of the multiple grippers 4, extending from the front end of the conveyor belt 3 to the conveyor belt. At the tail end, the baffle 5 can prevent materials from overflowing or falling from both sides of the conveyor belt 3. Especially when the conveyor belt 3 is tilted or the materials are loose, the baffle 5 can effectively block the materials, avoid material loss, guide the materials to flow in a predetermined direction on the conveyor belt 3, and ensure that the materials can reach the designated position smoothly. By adjusting the angle and position of the baffle 5, the material conveying path can be optimized. A conveyor motor 6 is fixedly installed on one side of the tail end of the conveyor belt 3. The conveyor motor 6 provides the power source for the conveying of the conveyor belt 3. The conveyor belt 3 is a flexible strip made of rubber, plastic or other materials, with a pattern on the surface. Idler rollers are fixedly installed at the front and rear ends of the conveyor belt 3 to support the conveyor belt 3 and reduce friction and wear during operation. The conveyor motor 6 drives the conveyor belt 3 to move the materials placed on the conveyor belt 3.

[0028] Two fixing rods 7 are fixedly installed on the top of the inner walls on both sides of the support column 1. A device housing 8 is fixedly connected to one side of the two fixing rods 7. The device housing 8 has openings on both sides to facilitate subsequent maintenance of the device. A connecting rod 9 is fixedly connected to the top of one side of the device housing 8. The tops of both sides of the connecting rod 9 are connected to the tail ends of the fixing rods 7. An eccentric wheel 10 is sleeved at the center of the connecting rod 9. A reciprocating motor 11 is fixedly connected to the bottom end of the eccentric wheel 10. The output end of the reciprocating motor 11 is connected to the eccentric wheel 10. The bottom ends are connected, and two heating blocks 12 are movably connected to the middle of the fixed rod 7. A packaging bag 13 is movably installed inside the heating blocks 12. The heating blocks 12 usually have electric heating elements installed inside, which heat up rapidly after being powered on. When the packaging bag 13 is conveyed to the sealing position inside the packaging bag 13 by the conveyor belt 3, the heating blocks 12 are pressed against the packaging bag 13 under the drive of the eccentric wheel 10 and the reciprocating motor 11, so that the plastic material at the bag opening melts and sets. After completing the sealing action, the heating blocks 12 quickly leave the packaging bag 13, so that the seal is complete. The rapid cooling and shaping of the part allows the eccentric wheel 10 to generate periodic displacement during rotation. When the eccentric wheel 10 is connected to the reciprocating motor 11, the rotational motion of the reciprocating motor 11 is converted into linear reciprocating motion through the eccentric wheel 10. The reciprocating motor 11 drives the eccentric wheel 10 to rotate. The eccentric structure of the eccentric wheel 10 causes the connecting rod 9 or push rod connected to it to generate up-down or left-right reciprocating motion. The reciprocating motion of the eccentric wheel 10 allows the packaging bag 13 to be periodically pressed against the packaging bag 13 to complete the sealing action. By adjusting the speed of the reciprocating motor 11 and the eccentricity of the eccentric wheel 10, the pressure of the heating block 12 and the sealing time can be controlled. The heating time of the heating block 12 is exactly the time when the conveyor belt 3 conveys the packaging bag 13 to the sealing position of the heating block 12. At the same time, the design of multiple supports 14 fixedly installed at the bottom of the conveyor belt 3 provides a stable support platform for the sealing equipment used to process the packaging bag 13, so that the stability of the machine is not affected when the packaging bag 13 sealing equipment is operating, thereby ensuring the processing quality.

[0029] In summary, the entire sealing process begins with placing the material on the conveyor belt 3 and fixing it with the gripper 4. The conveyor motor 6 drives the conveyor belt 3 to move, transporting the packaging bag 13 to the sealing position. The reciprocating motor 11 starts, and the eccentric wheel 10 generates reciprocating motion, driving the heating block 12 to press against the packaging bag 13. The heating block 12 melts and seals the sealing part of the packaging bag, and then quickly moves away after sealing. The sealed part cools and solidifies, and the sealed packaging bag continues to be transported along the conveyor belt to the next process. The design of multiple supports 14 greatly improves the stability and durability of the sealing device. The heating block 12, connected to the eccentric wheel 10 and the reciprocating motor 11, achieves efficient and reliable sealing of the packaging bag 13 through the combination of mechanical motion and heat sealing technology.

[0030] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A sealing device for packaging bag processing equipment, comprising a support column (1), a cover plate (2), a conveyor belt (3), and a bracket (14), characterized in that: A cover plate (2) is fixedly installed at the top of the support column (1), and a conveyor belt (3) is fixedly installed at the center of the bottom end of the cover plate (2). The conveyor belt (3) is located at the middle of the support column (1). Two fixing rods (7) are fixedly installed on the top of the inner walls on both sides of the support column (1). Connecting rods (9) are fixedly connected to the tail ends on both sides of the fixing rods (7). An eccentric wheel (10) is sleeved at the center of the connecting rod (9). A reciprocating motor (11) is fixedly connected to the bottom end of the eccentric wheel (10). The output end of the reciprocating motor (11) is connected to the bottom end of the eccentric wheel (10).

2. A sealing device for packaging bag processing equipment according to claim 1, characterized in that: The support column (1) includes a cover plate (2) located at the middle of the top. The cover plate (2) is fixedly connected to the middle of the top of the support column (1) on both sides. A conveyor belt (3) is installed at the middle of the bottom of the support column (1). Multiple grippers (4) are fixedly installed on both sides of the conveyor belt (3).

3. A sealing device for packaging bag processing equipment according to claim 2, characterized in that: Two baffles (5) are movably mounted at the middle of the plurality of grippers (4), the baffles (5) extending from the front end of the conveyor belt (3) to the rear end of the conveyor belt (3).

4. A sealing device for packaging bag processing equipment according to claim 1, characterized in that: A conveyor motor (6) is fixedly installed on one side of the tail end of the conveyor belt (3).

5. A sealing device for packaging bag processing equipment according to claim 1, characterized in that: A device housing (8) is fixedly connected to one side of the fixing rod (7), and a connecting rod (9) is fixedly connected to the top of one side of the device housing (8).

6. A sealing device for packaging bag processing equipment according to claim 5, characterized in that: Two heating blocks (12) are movably connected to the middle end of the fixing rod (7), and a packaging bag (13) is movably installed inside the heating block (12).

7. A sealing device for packaging bag processing equipment according to claim 6, characterized in that: The packaging bag (13) is located at the middle of the conveyor belt (3) and at the center of the two baffles (5).

8. A sealing device for packaging bag processing equipment according to claim 1, characterized in that: Multiple supports (14) are fixedly installed at the bottom end of the conveyor belt (3).