Heat sealing device for packaging bag production

Abstract

The utility model discloses a heat sealing device for packaging bag production, which comprises a rack, a horizontally arranged heat sealing plate is fixedly arranged on the rack, two spaced strip-shaped through holes are formed in the heat sealing plate in a penetrating manner, and the two strip-shaped through holes are arranged in parallel; an upper pressing plate is arranged above the heat sealing plate, two first heat sealing strips corresponding to the two strip-shaped through holes are arranged at the lower end of the upper pressing plate in a protruding mode, and first electric heating pipes are arranged in the first heat sealing strips; a lower pressing plate is arranged below the heat sealing plate, two second heat sealing strips corresponding to the two strip-shaped through holes are arranged at the upper end of the lower pressing plate in a protruding mode, and second electric heating pipes are arranged in the second heat sealing strips; the distance between the lower end of the first heat sealing strip and the upper surface of the heat sealing plate is consistent with the distance between the upper end of the second heat sealing strip and the heat sealing plate, the upper pressing plate and the lower pressing plate are driven by a synchronizing mechanism to synchronously move in the vertical direction in the opposite directions or in the opposite directions, and the upper face and the lower face of a packaging bag placed on the heat sealing plate are subjected to heat sealing. Therefore, the heat sealing quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag heat sealing, in particular to a heat sealing device for packaging bag production. Background Art

[0002] Plastic packaging bags are usually made of plastic films. After the plastic film is wound into a circular sleeve, heat sealing is performed on the positions that need to be sealed and connected on a heat sealing mechanism. Usually, on a heat sealing device, a high-temperature heat sealing strip is pressed on the sealing part of the plastic packaging bag for heat sealing through high temperature. The heat sealing strip moves up and down under the drive of a lifting mechanism to work. However, the movement of the heat sealing strip in such a device is unidirectional, and only one side of the upper and lower surfaces of the plastic packaging bag can be heated, which easily leads to poor heat sealing effect. Summary of the Utility Model

[0003] In order to solve the deficiencies in the above-mentioned prior art, the utility model provides a heat sealing device for packaging bag production.

[0004] In order to achieve the above technical effects, the utility model adopts the following scheme:

[0005] A heat sealing device for packaging bag production, including a frame, on which a horizontally arranged heat sealing plate is fixedly provided. Two spaced strip-shaped through holes are penetrated through the heat sealing plate, and the two strip-shaped through holes are arranged in parallel;

[0006] Above the heat sealing plate, there is an upper pressing plate. Two first heat sealing strips respectively corresponding to the two strip-shaped through holes protrude from the lower end of the upper pressing plate, and a first electric heating tube is arranged in the first heat sealing strip;

[0007] Below the heat sealing plate, there is a lower pressing plate. Two second heat sealing strips respectively corresponding to the two strip-shaped through holes protrude from the upper end of the lower pressing plate, and a second electric heating tube is arranged in the second heat sealing strip;

[0008] The distance from the lower end of the first heat sealing strip to the upper surface of the heat sealing plate is the same as the distance from the upper end of the second heat sealing strip to the heat sealing plate. The upper pressing plate and the lower pressing plate are driven by a synchronization mechanism to move synchronously towards or away from each other vertically.

[0009] In a preferred technical solution, the synchronization mechanism includes an upper eccentric wheel, an upper eccentric shaft, a lower eccentric wheel and a lower eccentric shaft. The upper eccentric wheel is rotatably installed on the frame through the upper eccentric shaft, and the upper eccentric shaft is connected to the output end of a motor;

[0010] The upper eccentric wheel is located above the upper pressing plate. A rotatably connected pipe sleeve is sleeved on the upper eccentric wheel. The lower end of the pipe sleeve is fixedly connected with a connecting rod, and the other end of the connecting rod is hinged to the upper end of the upper pressing plate. The upper pressing plate is connected with a first vertical guiding mechanism;

[0011] The lower eccentric wheel is located below the lower pressing plate. The lower eccentric wheel is symmetrically arranged with the upper eccentric wheel. A jack extending downward is fixedly provided at the lower end of the lower pressing plate. A rotating roller is installed at the lower end of the jack through a mounting bracket. The roller abuts against and rolls on the upper end of the lower eccentric wheel. The lower pressing plate is connected with a second vertical guiding mechanism;

[0012] One end of the upper eccentric shaft is fixedly provided with a first synchronous pulley. One end of the lower eccentric shaft is provided with a second synchronous pulley corresponding to the first synchronous pulley. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt for transmission.

[0013] In a preferred technical solution, the first vertical guiding mechanism includes a first guiding rod. A first guiding hole matching the first guiding rod is penetrated through the upper pressing plate. The first guiding rod is fixedly arranged on the machine frame. The first guiding rod is arranged through the first guiding hole.

[0014] In a preferred technical solution, the second vertical guiding mechanism includes a second guiding rod. The upper end of the second guiding rod is fixedly connected with the lower pressing plate. A vertical second guiding hole matching the second guiding rod is provided on the machine frame. The second guiding rod is vertically arranged through the second guiding hole.

[0015] In a preferred technical solution, a first spring is vertically connected between the upper pressing plate and the heat-sealing plate; a second spring is sleeved on the jack. The upper end of the second spring is connected with the machine frame. The lower end of the second spring is connected with the mounting bracket.

[0016] Compared with the prior art, the beneficial effects are as follows:

[0017] The utility model has a simple structure and is convenient to use. Driven by the synchronization mechanism, the upper pressing plate and the lower pressing plate drive the first heat-sealing strip and the second heat-sealing strip to move towards each other to heat-seal the packaging bag placed on the heat-sealing plate. Since both the upper and lower surfaces of the packaging bag can be heated, the quality of heat-sealing is improved. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is a schematic structural diagram of the utility model from another perspective;

[0020] Figure 3 is a schematic side view of the utility model.

[0021] Reference numerals: 1, frame; 2, heat-sealing plate; 3, upper pressure plate; 4, lower pressure plate; 5, strip-shaped through hole; 6, first heat-sealing strip; 7, second heat-sealing strip; 8, upper eccentric shaft; 9, upper eccentric wheel; 10, motor; 11, sleeve; 12, connecting rod; 13, first synchronous pulley; 14, second synchronous pulley; 15, synchronous belt; 16, lower eccentric shaft; 17, upper eccentric wheel; 18, roller; 19, mounting bracket; 20, ejector rod; 21, first guide rod; 22, first spring; 23, second guide rod; 24, second spring; 25, first electric heating tube; 26, second electric heating tube. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] A heat-sealing device for producing plastic bags includes a frame 1. A horizontally arranged heat-sealing plate 2 is fixedly provided on the frame 1. The heat-sealing plate 2 is used for placing the plastic bags to be heat-sealed. Two spaced strip-shaped through holes 5 penetrate through the heat-sealing plate 2. The two strip-shaped through holes 5 are arranged in parallel, and the strip-shaped through holes 5 are for the second heat-sealing strip 7 to pass through;

[0024] An upper pressure plate 3 is provided above the heat-sealing plate 2. Two first heat-sealing strips 6 respectively corresponding to the two strip-shaped through holes 5 protrude from the lower end of the upper pressure plate 3. A first electric heating tube 25 is arranged in the first heat-sealing strip 6, and the first electric heating tube 25 is used for heating the first heat-sealing strip 6;

[0025] A lower pressure plate 4 is provided below the heat-sealing plate 2. Two second heat-sealing strips 7 respectively corresponding to the two strip-shaped through holes 5 protrude from the upper end of the lower pressure plate 4. A second electric heating tube 26 is arranged in the second heat-sealing strip 7, and the second electric heating tube 26 is used for heating the second heat-sealing strip 7. The two second heat-sealing strips 7 are located below the two first heat-sealing strips 6 and correspond to each other one by one;

[0026] The distance from the lower end of the first heat-sealing strip 6 to the upper surface of the heat-sealing plate 2 is the same as the distance from the upper end of the second heat-sealing strip 7 to the heat-sealing plate 2. The upper pressure plate 3 and the lower pressure plate 4 are driven by a synchronous mechanism to move synchronously towards or away from each other in the vertical direction. When the first heat-sealing strip 6 and the second heat-sealing strip 7 move synchronously towards each other under the drive of the synchronous mechanism, the moving distances are the same and they can move to the same height on the upper surface of the heat-sealing plate 2 and stick together.

[0027] The packaging bag to be heat-sealed is placed on the heat-sealing plate 2, and the sealing end of the heat-sealing tape is located at the strip-shaped through-hole 5. Driven by the synchronization mechanism, the upper pressing plate 3 and the lower pressing plate 4 drive the first heat-sealing strip 6 and the second heat-sealing strip 7 to move toward each other. The lower end of the first heat-sealing strip 6 and the upper end of the second heat-sealing strip 7 move to the position of the upper surface of the heat-sealing plate 2 at the same time, and the packaging bag is clamped. The packaging bag placed on the heat-sealing plate 2 is heat-sealed. Since both the upper and lower surfaces of the packaging bag can be heated, the quality of the heat seal is improved.

[0028] The preferred technical solution is that the synchronization mechanism includes an upper eccentric wheel 9, an upper eccentric shaft 8, a lower eccentric wheel and a lower eccentric shaft 16. The upper eccentric wheel 9 is rotatably mounted on the frame 1 through the upper eccentric shaft 8, and the upper eccentric shaft 8 is connected to the output end of the motor 10. The upper eccentric wheel 9 has the same specifications as the lower eccentric wheel, and the upper eccentric shaft 8 has the same specifications as the lower eccentric shaft 16.

[0029] The upper eccentric wheel 9 is located above the upper pressing plate 3. A rotatably connected sleeve 11 is sleeved on the upper eccentric wheel 9. The lower end of the sleeve 11 is fixedly connected to a connecting rod 12. The other end of the connecting rod 12 is hinged to the upper end of the upper pressing plate 3. The upper pressing plate 3 is connected to a first vertical guide mechanism. The distance from the proximal end to the distal end of the upper eccentric wheel 9 is consistent with the distance from the lower end of the first heat sealing strip 6 to the upper surface of the heat sealing plate 2.

[0030] The lower eccentric wheel is located below the lower pressing plate 4, and the lower eccentric wheel is symmetrically arranged with the upper eccentric wheel 9. The lower end of the lower pressing plate 4 is fixed with a downwardly extending push rod 20, and the lower end of the push rod 20 is installed with a rotating roller 18 through a mounting frame 19. The roller 18 rolls against the upper end of the lower eccentric wheel, and the lower pressing plate 4 is connected to a second vertical guide mechanism. The distance from the proximal end to the distal end of the lower eccentric wheel is consistent with the distance from the upper end of the second heat sealing strip 7 to the upper surface of the heat sealing plate 2;

[0031] A first synchronous wheel 13 is fixedly provided at one end of the upper eccentric shaft 8 , and a second synchronous wheel 14 corresponding to the first synchronous wheel 13 is provided at one end of the lower eccentric shaft 16 . The first synchronous wheel 13 and the second synchronous wheel 14 are connected through a synchronous belt 15 .

[0032] The motor 10 drives the upper eccentric wheel 9 to rotate through the upper eccentric shaft 8, thereby driving the upper pressure plate 3 to move vertically through the pipe sleeve 11 and the connecting rod 12, and at the same time drives the lower eccentric shaft 16 to rotate synchronously through the transmission of the first synchronous wheel 13, the second synchronous wheel 14 and the synchronous belt 15, thereby driving the lower eccentric wheel to rotate synchronously. When the lower eccentric wheel rotates, it drives the lower pressure plate 4 to move vertically through the top roller 18 and the top rod 20, thereby realizing that the motor 10 drives the upper pressure plate 3 and the lower pressure plate 4 to move synchronously toward or oppositely.

[0033] Preferred technical solution: The first vertical guiding mechanism includes a first guiding rod 21. A first guiding hole matching the first guiding rod 21 is formed through the upper pressing plate 3. The first guiding rod 21 is fixedly arranged on the frame 1, and the first guiding rod 21 passes through the first guiding hole.

[0034] Preferred technical solution: The second vertical guiding mechanism includes a second guiding rod 23. The upper end of the second guiding rod 23 is fixedly connected to the lower pressing plate 4. A vertical second guiding hole matching the second guiding rod 23 is formed on the frame 1, and the second guiding rod 23 vertically passes through the second guiding hole.

[0035] Preferred technical solution: A vertically arranged first spring 22 is connected between the upper pressing plate 3 and the heat-sealing plate 2; a second spring 24 is sleeved on the ejector rod 20. The upper end of the second spring 24 is connected to the frame 1, and the lower end of the second spring 24 is connected to the mounting bracket 19.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present invention is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0038] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A heat-sealing device for producing packaging bags, characterized in that It comprises a frame (1), a horizontally arranged heat sealing plate (2) is fixed on the frame (1), and two spaced strip-shaped through holes (5) are penetrated through the heat sealing plate (2), and the two strip-shaped through holes (5) are arranged in parallel; An upper pressing plate (3) is provided above the heat sealing plate (2), and two first heat sealing strips (6) corresponding to the two strip-shaped through holes (5) are protruding from the lower end of the upper pressing plate (3), and a first electric heating tube (25) is provided inside the first heat sealing strip (6); A lower pressing plate (4) is provided below the heat sealing plate (2), and two second heat sealing strips (7) corresponding to the two strip-shaped through holes (5) are protruding from the upper end of the lower pressing plate (4), and a second electric heating tube (26) is provided inside the second heat sealing strip (7); The distance between the lower end of the first heat sealing strip (6) and the upper surface of the heat sealing plate (2) is consistent with the distance between the upper end of the second heat sealing strip (7) and the heat sealing plate (2), and the upper pressing plate (3) and the lower pressing plate (4) are driven by a synchronization mechanism to move synchronously toward or away from each other in the vertical direction.

2. The heat-sealing device for producing packaging bags according to claim 1, wherein, The synchronization mechanism comprises an upper eccentric wheel (9), an upper eccentric shaft (8), a lower eccentric wheel and a lower eccentric shaft (16), wherein the upper eccentric wheel (9) is rotatably mounted on the frame (1) via the upper eccentric shaft (8), and the upper eccentric shaft (8) is connected to the output end of the motor (10); The upper eccentric wheel (9) is located above the upper pressure plate (3), and a rotatably connected pipe sleeve (11) is sleeved on the upper eccentric wheel (9), and the lower end of the pipe sleeve (11) is fixedly connected to a connecting rod (12), and the other end of the connecting rod (12) is hinged to the upper end of the upper pressure plate (3), and the upper pressure plate (3) is connected to a first vertical guide mechanism; The lower eccentric wheel is located below the lower pressure plate (4), and the lower eccentric wheel and the upper eccentric wheel (9) are symmetrically arranged. The lower end of the lower pressure plate (4) is fixed with a downwardly extending push rod (20), and the lower end of the push rod (20) is installed with a rotating roller (18) through a mounting frame (19). The roller (18) rolls against the upper end of the lower eccentric wheel, and the lower pressure plate (4) is connected to a second vertical guide mechanism. A first synchronous wheel (13) is fixedly provided at one end of the upper eccentric shaft (8), and a second synchronous wheel (14) corresponding to the first synchronous wheel (13) is provided at one end of the lower eccentric shaft (16). The first synchronous wheel (13) and the second synchronous wheel (14) are connected by a synchronous belt (15).

3. The heat-sealing device for producing packaging bags according to claim 2, characterized in that, The first vertical guide mechanism comprises a first guide rod (21); a first guide hole matching the first guide rod (21) is provided through the upper pressure plate (3); the first guide rod (21) is fixed on the frame (1); and the first guide rod (21) is provided through the first guide hole.

4. The heat-sealing device for producing packaging bags according to claim 2, wherein, The second vertical guide mechanism includes a second guide rod (23), the upper end of the second guide rod (23) is fixedly connected to the lower pressure plate (4), the frame (1) is provided with a vertical second guide hole matching the second guide rod (23), and the second guide rod (23) is vertically arranged through the second guide hole.

5. The heat-sealing device for producing packaging bags according to claim 2, wherein, A first vertically arranged spring (22) is connected between the upper pressing plate (3) and the heat-sealing plate (2); a second spring (24) is sleeved on the ejector rod (20), the upper end of the second spring (24) is connected to the machine frame (1), and the lower end of the second spring (24) is connected to the mounting bracket (19).

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