A sealing machine for food packaging bags

Abstract

This utility model discloses a sealing machine for food packaging bags, comprising: a frame, a pair of sliding rods arranged between the front and rear inner walls of the frame, a telescopic cylinder fixedly connected to the front inner wall of the frame, the telescopic cylinder being located between the sliding rods, and a first sliding plate, a second sliding plate, and a third sliding plate sequentially slidably connected to the sliding rods; rotating plates rotatably connected to the left and right inner walls of the frame, first push rods rotatably connected to both sides of the first sliding plate, the other end of the first push rods rotatably connected to the lower end of the adjacent rotating plate; second push rods rotatably connected to both sides of the third sliding plate, the other end of the second push rods respectively rotatably connected to the upper end of the adjacent rotating plate, the third sliding plate cooperating with the second sliding plate, and a heat pressure plate arranged between the first and second sliding plates; an adjusting rod for adjusting the length of the first push rod is provided in the middle of the first push rod, which can flexibly adjust the heat pressure of the heat pressure plate on the packaging bag according to different sealing requirements, thereby improving the flexibility and applicability of the sealing machine.

Description

Technical Field

[0001] This utility model belongs to the technical field of sealing devices, and specifically relates to a sealing machine for food packaging bags. Background Technology

[0002] Food packaging is an integral part of food products and a major process in the food industry. Before food can be sold, it needs to be sealed using sealing equipment. Existing food packaging bag sealing machines typically use heat-sealing machines, which are the most common type. Their working principle involves using heating elements to heat the plastic film at the sealing point to its melting point, then applying pressure to fuse the two layers of film together, forming a strong seal upon cooling. Heat-sealing machines can be further divided into pulse-type and continuous-type. Pulse-type heat-sealing machines use instantaneous heating and are suitable for thinner plastic packaging bags; continuous-type heat-sealing machines use continuous heating and can be used to seal thicker packaging bags.

[0003] The pressure during the operation of a sealing machine is a major factor affecting the sealing quality of packaging bags. Uneven pressure can leave air trapped at the seal, forming bubbles. These bubbles not only affect the appearance of the packaging bag but also reduce the seal's tightness. Over time, the seal strength at the bubble locations gradually weakens, potentially leading to leakage. Different sizes of packaging bags require different sealing pressures, necessitating frequent adjustments to the sealing pressure in actual production based on sealing quality requirements. However, existing sealing equipment is complex in structure, and adjusting the heat-pressing pressure is typically cumbersome, requiring specialized technicians and consuming significant time, resulting in decreased production efficiency.

[0004] Therefore, this application provides a sealing machine for food packaging bags, which aims to simplify the structure of the sealing machine and facilitate the adjustment of sealing pressure, thereby improving production efficiency and reducing equipment costs. Utility Model Content

[0005] This utility model provides a sealing machine for food packaging bags, which aims to solve the problems pointed out in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A sealing machine for food packaging bags includes: a rectangular frame, a pair of slide rods symmetrically arranged between the front and rear inner walls of the frame, a telescopic cylinder fixedly connected to the front inner wall of the frame, the telescopic cylinder being located between the slide rods, a first slide plate, a second slide plate, and a third slide plate being slidably connected to the slide rods in sequence, and the extended end of the telescopic cylinder being fixedly connected to the first slide plate.

[0008] Rotating plates are rotatably connected to the middle of the left and right inner walls of the frame, respectively. One end of a first push rod is rotatably connected to each side of the first sliding plate, and the other end of the first push rod is rotatably connected to the lower end of the adjacent rotating plate. One end of a second push rod is rotatably connected to each side of the third sliding plate, and the other end of the second push rod is rotatably connected to the upper end of the adjacent rotating plate. The third sliding plate cooperates with the second sliding plate to drive the second sliding plate to move. A hot press plate is provided between the first and second sliding plates. An adjusting rod for adjusting the length of the first push rod is provided in the middle of the first push rod.

[0009] Furthermore, the first push rod has two connectors at both ends, which are rotatably connected to the first slide plate and the rotating plate, respectively. The adjusting rod has threaded rods at both ends, which are threaded to adjacent connectors. A rotating part is provided between the threaded rods, and a locking nut is threaded onto the threaded rod.

[0010] Furthermore, the connector has a lubrication cavity inside.

[0011] Furthermore, an anti-slip pad is provided between the locking nut and the adjacent connector.

[0012] Furthermore, a clearance groove is provided in the middle of the hot press plate, and the clearance groove is provided through one side of the hot press plate. Hot press heads are respectively provided in the upper and lower parts of the clearance groove.

[0013] Furthermore, a pair of pressing springs are provided between the second and third sliding plates, and the pressing springs are sleeved on the sliding rod;

[0014] A pull rod is fixedly connected to the side of the second slide plate adjacent to the third slide plate, and a limit bolt is threadedly connected to the pull rod after it passes through the third slide plate.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] 1. The food packaging bag sealing machine of this utility model uses a telescopic cylinder to push the first sliding plate slide rod upwards, and uses a first push rod to drive the rotating plate to rotate. When the rotating plate rotates, it can drive the third sliding plate to slide, and the third sliding plate drives the second sliding plate to slide, so that the first and second sliding plates clamp and heat-press the packaging bag from the left and right sides. Using a telescopic cylinder as a power source can effectively reduce equipment costs. All actions of the sealing machine can be achieved by controlling the extension and retraction of the cylinder. At the same time, the connection between the components is mostly a rotating connection, which is convenient for disassembly and installation. When the equipment malfunctions or requires maintenance, maintenance personnel can easily inspect and replace parts.

[0017] 2. The food packaging bag sealing machine of this utility model has an adjusting rod in the middle of the first push rod. By adjusting the length of the adjusting rod, the overall length of the first push rod can be changed, thereby adjusting the rotation angle and position of the rotating plate. This means that the heat pressure of the hot press plate on the packaging bag can be flexibly adjusted according to different sealing needs, improving the flexibility and applicability of the sealing machine. Attached Figure Description

[0018] Figure 1 This is an overall isometric view of a sealing machine for food packaging bags according to the present invention;

[0019] Figure 2 This is a cross-sectional view of the first push rod of a sealing machine for food packaging bags according to this utility model;

[0020] Figure 3 This is a schematic diagram of the hot press plate structure of a sealing machine for food packaging bags according to this utility model.

[0021] In the picture:

[0022] 1. Frame; 2. Slide bar; 3. Telescopic cylinder; 4. First slide plate; 5. Second slide plate; 6. Third slide plate;

[0023] 7. First push rod; 701. Connector; 702. Adjusting rod; 703. Threaded rod; 704. Rotating part; 705. Locking nut; 706. Lubrication chamber;

[0024] 8. Second push rod; 9. Rotating plate; 10. Pressing spring; 11. Pull rod; 12. Limit bolt;

[0025] 13. Hot press plate; 1301. Clearance groove; 1302. Hot press head. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments of this application and the accompanying drawings.

[0027] like Figure 1-2 As shown, a sealing machine for food packaging bags includes: a rectangular frame 1, a pair of slide rods 2 symmetrically arranged between the front and rear inner walls of the frame 1, a telescopic cylinder 3 fixedly connected to the front inner wall of the frame 1, the telescopic cylinder 3 being located between the slide rods 2, a first slide plate 4, a second slide plate 5 and a third slide plate 6 being slidably connected to the slide rods 2 in sequence, and the extended end of the telescopic cylinder being fixedly connected to the first slide plate;

[0028] Rotating plates 9 are rotatably connected to the middle of the left and right inner walls of the frame 1, respectively. One end of a first push rod 7 is rotatably connected to both sides of the first sliding plate 4, and the other end of the first push rod 7 is rotatably connected to the lower end of the adjacent rotating plate 9. One end of a second push rod 8 is rotatably connected to both sides of the third sliding plate 6, and the other end of the second push rod 8 is rotatably connected to the upper end of the adjacent rotating plate 9. The third sliding plate 6 cooperates with the second sliding plate 5 to drive the second sliding plate 5 to move. A hot press plate 13 is provided between the first sliding plate 4 and the second sliding plate 5. An adjusting rod 702 for adjusting the length of the first push rod 7 is provided in the middle of the first push rod 7.

[0029] The first sliding plate 4 is pushed onto the sliding rod by the telescopic cylinder 3, and the rotating plate 9 is driven to rotate by the first push rod 7. When the rotating plate 9 rotates, it can drive the third sliding plate 6 to slide through the second push rod 8, and the third sliding plate 6 drives the second sliding plate 5 to slide, so that the first sliding plate 4 and the second sliding plate 5 clamp and heat-press the packaging bag from both sides. Using a telescopic cylinder 3 as a power source can effectively reduce equipment costs. All actions of the sealing machine can be achieved by controlling the extension and retraction of the cylinder. At the same time, the connection between the components is mostly a rotating connection, which is convenient for disassembly and installation. When the equipment malfunctions or needs maintenance, maintenance personnel can easily inspect and replace parts. An adjusting rod 702 is set in the middle of the first push rod 7. By adjusting the length of the adjusting rod 702, the overall length of the first push rod 7 can be changed, thereby adjusting the rotation angle and position of the rotating plate 9. This means that the heat-pressing pressure of the heat-pressing plate 13 on the packaging bag can be flexibly adjusted according to different sealing needs, improving the flexibility and applicability of the sealing machine.

[0030] like Figure 2 As shown, the first push rod 7 has two connectors 701 at both ends. The connectors 701 are rotatably connected to the first slide plate 4 and the rotating plate 9, respectively. The adjusting rod 702 has threaded rods 703 at both ends. The threaded rods 703 are threadedly connected to the adjacent connectors 701. A rotating part 704 is provided between the threaded rods 703. A locking nut 705 is threadedly connected to the threaded rods 703.

[0031] The adjusting rod 702 has threaded rods 703 at both ends, and the threaded rods 703 are threadedly connected to the adjacent connectors 701. By rotating the rotating part 704 of the adjusting rod 702, the overall length of the first push rod 7 can be easily changed using the threaded transmission principle. This allows the operator to quickly and easily adjust the length of the first push rod 7 according to actual sealing needs, such as the size of the packaging bag and the sealing position, thereby changing the rotation angle and position of the rotating plate 9 and achieving flexible adjustment of the heat pressure of the hot press plate on the packaging bag. The rotating part 704 is designed to facilitate the use of tools such as wrenches to rotate the adjusting rod 702, thereby adjusting the length of the first push rod 7. A locking nut 705 is threadedly connected to the threaded rod 703. After adjusting the length of the first push rod 7, tightening the locking nut 705 can firmly fix the adjusting rod 702 and the connector 701 together, preventing the adjusting rod 702 from loosening due to vibration or other reasons during the operation of the sealing machine, thus ensuring the stability of the length of the first push rod 7. This is crucial for maintaining the stability of the position and angle of the rotating plate 9, ensuring that the sealing machine can perform sealing operations continuously and stably throughout the entire working process, and avoiding the sealing effect being affected by the loosening of the adjusting rod 702.

[0032] like Figure 2 As shown, the connector 701 has a lubrication cavity 706 inside. The lubrication cavity 706 can store lubricating oil or grease. When the connector 701 is rotatably connected to the first slide plate 4 and the rotating plate 9 and rotates relative to each other, the lubricant in the lubrication cavity can form a lubricating film on the contact surface, effectively reducing the coefficient of friction between the connector 701 and these components. This reduces the heat and wear generated by friction, making the surfaces of the connector 701, the first slide plate 4, and the rotating plate 9 less prone to damage, thereby extending the service life of these components and reducing the frequency and cost of equipment maintenance.

[0033] In one specific embodiment, an anti-slip washer is provided between the locking nut 705 and the adjacent connector 701. The anti-slip washer can evenly distribute the pressure between the locking nut 705 and the connector 701, making the connection between the two tighter and more stable. This helps to prevent local wear or deformation caused by pressure concentration during long-term use, further enhancing the reliability of the connection and reducing equipment failures and safety hazards caused by loose connections.

[0034] like Figure 3As shown, a clearance groove 1301 is provided in the middle of the hot press plate 13, and the clearance groove 1301 extends through one side of the hot press plate 13. Hot press heads 1302 are respectively provided above and below the clearance groove 1301. This design allows for the formation of special sealing patterns during packaging, and the clearance groove 1301 plays a crucial role in creating packaging bags with specific openings or channels in the sealing area. The hot press plate 13 is equipped with heating components for cooperating with the hot press heads 1302. The arrangement and selection of the heating components can be flexibly chosen according to actual needs, which is a conventional technique in the field and will not be elaborated further here.

[0035] like Figure 1 As shown, a pair of pressing springs 10 are provided between the second sliding plate 5 and the third sliding plate 6, and the pressing springs 10 are sleeved on the sliding rod 2;

[0036] A pull rod 11 is fixedly connected to the side of the second slide plate 5 adjacent to the third slide plate 6. The pull rod 11 passes through the third slide plate 6 and is threadedly connected to a limit bolt 12. During the hot pressing operation, the third slide plate 6 applies a pushing force to the second slide plate 5 through a pressing spring 10. When the pressure is too high, the pressing spring 10 can deform to relieve the pressure between the second slide plate 5 and the first slide plate 4, ensuring the hot pressing effect. Furthermore, by setting the pressing spring 10, the sliding formation of the third slide plate 6 will change after the length of the first push rod 7 is adjusted. When the telescopic cylinder 3 is fully extended, the degree of deformation of the pressing spring 10 also changes, thereby changing the pressure of the hot pressing plate 13 between the first slide plate 4 and the second slide plate 5, making the adjustment flexible and convenient.

[0037] When the hot pressing is completed and the hot pressing plate 13 needs to be separated, the third slide plate 6 slides away from the first slide plate 4. The third slide plate 6 drives the limit bolt 12 to move, the limit bolt 12 drives the pull rod 11 to move, and the pull rod 11 drives the second slide plate 5 to move, thereby separating from the first slide plate 4. During the hot pressing action, the pull rod 11 is slidably connected to the third slide plate 6, and the limit bolt 12 can be separated from the third slide plate 6.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A sealing machine for food packaging bags, characterized in that, include: A rectangular frame (1) has a pair of sliding rods (2) symmetrically arranged between the front and rear inner walls of the frame (1). A telescopic cylinder (3) is fixedly connected to the front inner wall of the frame (1). The telescopic cylinder (3) is located between the sliding rods (2). A first sliding plate (4), a second sliding plate (5), and a third sliding plate (6) are slidably connected to the sliding rods (2) in sequence. The extended end of the telescopic cylinder (3) is fixedly connected to the first sliding plate (4). Rotating plates (9) are rotatably connected to the middle of the left and right inner walls of the frame (1). One end of a first push rod (7) is rotatably connected to both sides of the first sliding plate (4). The other end of the first push rod (7) is rotatably connected to the lower end of the adjacent rotating plate (9). One end of a second push rod (8) is rotatably connected to both sides of the third sliding plate (6). The other end of the second push rod (8) is rotatably connected to the upper end of the adjacent rotating plate (9). The third sliding plate (6) cooperates with the second sliding plate (5) to drive the second sliding plate (5) to move. A hot press plate (13) is provided between the first sliding plate (4) and the second sliding plate (5). An adjusting rod (702) for adjusting the length of the first push rod (7) is provided in the middle of the first push rod (7).

2. The sealing machine for food packaging bags according to claim 1, characterized in that, The first push rod (7) has two connectors (701) at both ends. The connectors (701) are rotatably connected to the first slide plate (4) and the rotating plate (9) respectively. The adjusting rod (702) has threaded rods (703) at both ends. The threaded rods (703) are threadedly connected to the adjacent connectors (701) respectively. A rotating part (704) is provided between the threaded rods (703). A locking nut (705) is threadedly connected to the threaded rod (703).

3. A sealing machine for food packaging bags according to claim 2, characterized in that, The connector (701) has a lubrication cavity (706) inside.

4. A sealing machine for food packaging bags according to claim 2, characterized in that, An anti-slip pad is provided between the locking nut (705) and the adjacent connector (701).

5. A sealing machine for food packaging bags according to claim 1, characterized in that, The hot press plate (13) has a relief groove (1301) in the middle, and the relief groove (1301) is provided through one side of the hot press plate (13). The upper and lower parts of the relief groove (1301) are respectively provided with hot press heads (1302).

6. A sealing machine for food packaging bags according to claim 1, characterized in that, A pair of pressing springs (10) are provided between the second sliding plate (5) and the third sliding plate (6), and the pressing springs (10) are sleeved on the sliding rod (2); A pull rod (11) is fixedly connected to the side of the second slide plate (5) adjacent to the third slide plate (6). The pull rod (11) passes through the third slide plate (6) and is threadedly connected to a limit bolt (12).

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