Synchronous double-roller longitudinal sealing supporting structure

Abstract

The utility model relates to a roller longitudinal sealing supporting structure, in particular to a synchronous double-roller longitudinal sealing supporting structure. A synchronous double-roller longitudinal sealing supporting structure comprises a supporting roller, a heat sealing roller, a first universal coupling, a second universal coupling, a linkage assembly, a first adjusting assembly and a second adjusting assembly. One end of the supporting roller is connected with one end of the first universal coupling, the other end of the first universal coupling is connected with the linkage assembly, the linkage assembly is further connected with one end of the second universal coupling, the linkage assembly drives the first universal coupling and the second universal coupling to synchronously and reversely rotate, and the other end of the second universal coupling is connected with the heat sealing roller. A vertical forming pipe is arranged between the heat sealing roller and the supporting roller; the first adjusting assembly sleeves the outer side of the supporting roller; and the second adjusting assembly sleeves the outer side of the heat sealing roller. The technical problems that an existing longitudinal sealing structure is unstable in pressure in the longitudinal sealing process, the sealing effect is not ideal, and the bag shape is not attractive are solved.

Description

Technical Field

[0001] The utility model relates to a drum longitudinal sealing support structure, in particular to a synchronous double-drum longitudinal sealing support structure. Background Art

[0002] Existing longitudinal sealing systems typically utilize a single heat-sealing roller pressing against a forming tube to complete the longitudinal sealing action. Before use, a former is used to wrap a strip of packaging film around the outside of the forming tube, with the film opening facing the heat-sealing roller. During operation, the heat-sealing roller presses against the forming tube, sealing the film opening and completing the longitudinal seal.

[0003] However, sealing the packaging film requires a certain level of pressure and temperature, so the heat-sealing roller must reliably press against the forming tube. However, to ensure smooth material flow through the forming tube, the tube wall is typically no thicker than 0.5mm. Consequently, the forming tube can bend due to the pressure of the heat-sealing roller. This results in unstable pressure, unsatisfactory sealing, and compromised bag shape. Utility Model Content

[0004] The main purpose of the utility model is to provide a synchronous double-drum longitudinal sealing support structure to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a synchronous double-drum longitudinal sealing support structure, comprising a support drum, a heat sealing drum, a first universal joint, a second universal joint, a linkage assembly, a first adjustment assembly and a second adjustment assembly;

[0006] One end of the supporting roller is connected to one end of the first universal coupling, the other end of the first universal coupling is connected to the linkage assembly, and the linkage assembly is also connected to one end of the second universal coupling. The linkage assembly drives the first universal coupling and the second universal coupling to rotate synchronously and in opposite directions. The other end of the second universal coupling is connected to the heat sealing roller, and a vertical forming tube is provided between the heat sealing roller and the supporting roller.

[0007] The first adjusting assembly is sleeved on the outside of the supporting roller, and the first adjusting assembly is used to adjust the distance between the supporting roller and the forming tube;

[0008] The second adjusting component is sleeved on the outer side of the heat sealing roller, and the second adjusting component is used to adjust the distance between the heat sealing roller and the forming tube.

[0009] Preferably, the linkage assembly includes a first gear and a second gear;

[0010] The first gear is key-connected to the first universal joint, the first gear is meshed with the second gear, and the second gear is key-connected to the second universal joint.

[0011] Preferably, the first gear and the second gear are synchronous gears.

[0012] Preferably, the first adjustment assembly includes a first bearing seat, a first base plate, and a first rotating shaft seat;

[0013] The first bearing seat is sleeved on the outside of the supporting roller, the bottom of the first bearing seat is fixedly connected to one end of the first base plate, and the other end of the first base plate is rotatably connected to the first rotating shaft seat. The first base plate is fixed with a pushing block, and the first rotating shaft seat is fixed with a pushing plate. The push plate is limitedly connected with a first limiting bolt, and the first limiting bolt abuts against the pushing block.

[0014] Preferably, the first limiting bolt is connected to the push plate in a limiting manner through two first nuts.

[0015] Preferably, the second adjustment assembly includes a second bearing seat, a second base plate and a second rotating shaft seat;

[0016] The second bearing seat is sleeved on the outer side of the heat-sealing roller, the bottom of the second bearing seat is fixedly connected to one end of the second base plate, the other end of the second base plate is rotatably connected to the second rotating shaft seat, the second rotating shaft seat is fixedly connected to a top block, the second base plate is fixed with a top plate, the top plate is limitedly connected to a second limiting bolt, and the second limiting bolt abuts against the top block.

[0017] Preferably, the second limiting bolt is threadedly connected to a second nut, and the second nut is arranged between the top plate and the top block.

[0018] Preferably, the side wall of the second bearing seat is fixedly connected with a side support plate, and the side support plate is away from the supporting roller.

[0019] Preferably, the second adjustment assembly further includes a limiting component, which includes a mounting frame, a cylinder, an adjustment rod and a spring;

[0020] The cylinder is fixedly connected to the mounting frame, and the telescopic end of the cylinder abuts against one end of the side support plate;

[0021] The other end of the side support plate is in contact with a spring, and the spring is sleeved on the outside of the adjusting rod, and the adjusting rod is fixedly connected to the mounting frame.

[0022] The beneficial effects achieved by the utility model are:

[0023] The utility model realizes that the directions of the supporting roller and the heat-sealing roller are adjustable through the first universal coupling and the second universal coupling, thereby adjusting the distance between the heat-sealing roller, the supporting roller and the forming tube, and ensuring appropriate pressure during the longitudinal sealing process; the utility model sets a linkage component, so that the supporting roller and the heat-sealing roller rotate in opposite directions of the speed box, and the supporting roller and the heat-sealing roller can synchronously pull the packaging film in the front and back directions, ensuring that the packaging film will not be wrinkled or torn; the direct pressure between the supporting roller and the heat-pressing roller and the forming tube can be adjusted through the first adjustment component and the second adjustment component, thereby preventing the forming tube from deflecting during the longitudinal seaming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a schematic diagram of a synchronous double-drum longitudinal sealing support structure disclosed in a specific embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of a synchronous double-drum longitudinal sealing support structure and a forming tube in cooperation with a specific embodiment of the present utility model;

[0027] Figure 3 This is another schematic diagram of a synchronous double-drum longitudinal sealing support structure disclosed in a specific embodiment of the utility model;

[0028] Figure 4 It is a bottom view of a synchronous double-drum longitudinal sealing support structure disclosed in a specific embodiment of the utility model.

[0029] 1. Support roller; 2. Heat sealing roller; 3. First universal joint; 4. Second universal joint; 5. Linkage assembly; 51. First gear; 52. Second gear; 6. First adjusting assembly; 61. First bearing seat; 62. First bottom plate; 621. Push block; 63. First rotating shaft seat; 631. Push plate; 64. First limiting bolt; 65. First nut; 7. Second adjusting assembly; 71. Second bearing seat; 72. Second bottom plate; 721. Top plate; 73. Second rotating shaft seat; 731. Top block; 74. Second limiting bolt; 75. Second nut; 76. Limiting component; 761. Mounting frame; 762. Cylinder; 763. Adjusting rod; 764. Spring; 77. Side support plate; 8. Forming tube. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figure 1-Figure 4As shown, the utility model discloses a synchronous dual-roller longitudinal sealing support structure, comprising a support roller 1, a heat sealing roller 2, a first universal joint 3, a second universal joint 4, a linkage assembly 5, a first adjustment assembly 6, and a second adjustment assembly 7. The support roller 1 is used to support the forming tube 8. One end of the first roller 1 is connected to one end of the first universal joint 3, the other end of the first universal joint 3 is connected to the linkage assembly 5, the linkage assembly 5 is further connected to one end of the second universal joint 4, and the other end of the second universal joint 4 is connected to the heat sealing roller 2.

[0032] The linkage assembly 5 is used to drive the first universal joint 3 and the second universal joint 4 to rotate synchronously and in opposite directions. Figure 1 、 Figure 2 As shown, the linkage assembly 5 includes a first gear 51 and a second gear 52. The first gear 51 and the second gear 52 are synchronous gears. The first gear 51 is keyed to the first universal joint 3, meshing with the second gear 52, which is keyed to the second universal joint 4. During use, the motor drives the second gear 52 to rotate, which in turn drives the first gear 51 to rotate, thereby achieving synchronous rotation of the support roller 1 and the heat sealing roller 2. The forming tube 8 is disposed between the support roller 1 and the heat sealing roller 2.

[0033] In order to facilitate the adjustment and fixation of the position of the support roller 1 and further adjust the pressure between the support roller 1 and the forming tube 8, a first adjustment component 6 is provided on the outer side of the support roller 1. Figure 1 、 Figure 3 and Figure 4 As shown, the first adjustment assembly 6 includes a first bearing seat 61, a first base plate 62 and a first shaft seat 63. The first bearing seat 61 is sleeved on the outside of the support roller 1, and the support roller 1 can rotate freely in the first bearing seat 61. Figure 3 For example, the lower side of the first bearing seat 61 is fixedly connected to one end of the first base plate 62, and the other end of the first base plate 62 is rotatably connected to the first shaft seat 63. The first base plate 62 is fixedly provided with a push block 621, and the first shaft seat 63 is fixedly connected to a push plate 631. The push plate 631 is limitedly connected to a first limiting bolt 64. As an embodiment, the first limiting bolt 64 is threadedly connected to two first nuts 65, such as Figure 4 As shown, the two first nuts 65 abut against either side of the push plate 631, thereby achieving a position-limiting connection. The first limiting bolt 64 abuts against the push block 621. During use, the positions of the two first nuts 65 are adjusted to adjust the length of the first limiting bolt 64 between the push plate 631 and the push block 621, thereby adjusting the distance between the push plate 631 and the push block 621, changing the position of the support roller 1, and thus adjusting the distance between the support roller 1 and the forming tube 8.

[0034] In order to facilitate the adjustment and fixation of the position of the heat sealing roller 2, the pressure between the heat sealing roller 2 and the forming tube 8 is further adjusted. The heat sealing roller 2 is provided with a second adjustment assembly 7 on the outside. The second adjustment assembly 7 includes a second bearing seat 71, a second bottom plate 72 and a second shaft seat 73. Figure 1 and Figure 3 As shown, the second bearing seat 71 is sleeved on the outside of the heat-sealing roller 2, the bottom of the second bearing seat 71 is fixedly connected to one end of the second bottom plate 72, the other end of the second bottom plate 72 is rotatably connected to the second shaft seat 73, the second shaft seat 73 is fixedly connected to the top block 731, the second bottom plate 72 is fixedly connected to the top plate 721, the top plate 721 is limitedly connected to the second limiting bolt 74, and the second limiting bolt 74 abuts against the top block 731. As a way of limiting the connection between the second limiting bolt 74 and the top plate 721, Figure 4 For example, the second limiting bolt 74 is threadedly connected to a second nut 75, and the upper portion of the second nut 75 abuts against the top plate 721. During use, by adjusting the position of the second nut 75 on the second limiting bolt 74, the length of the second limiting bolt 74 between the top plate 721 and the top block 731 is adjusted, thereby adjusting the distance between the heat sealing roller 2 and the forming tube 8.

[0035] In order to prevent the heat sealing roller from rebounding during the longitudinal sealing process, Figure 1 、 Figure 3 As shown, the side wall of the second bearing seat 71 is fixedly connected to a side support plate 77, and the second adjustment assembly 7 also includes a limiting component 76. During the longitudinal sealing process, the limiting component 76 is used to push the side support plate 77 to prevent the heat sealing roller 2 from rebounding. After the longitudinal sealing is completed, the limiting component 76 can allow the heat sealing roller 2 to rebound, thereby facilitating the adjustment and replacement of the forming tube 8. Figure 1 As shown, the limiting component 76 includes a mounting frame 761, a cylinder 762, an adjusting rod 763, and a spring 764. The cylinder 762 is fixedly connected to the mounting frame 761. The telescopic end of the cylinder 762 abuts against one end of the side support plate 77. The other end of the side support plate 77 abuts against the spring 764. The end of the spring 764 away from the side support plate 77 is inserted with an adjusting rod 763. The adjusting rod 763 is fixedly connected to the mounting frame 761. During use, during the longitudinal sealing process, the cylinder 762 abuts against the side support plate 77 to prevent the heat sealing roller 2 from changing position. After the longitudinal sealing is completed, the cylinder 762 contracts, and the spring 764 squeezes the side support plate 77, causing the side support plate 77 to deflect, thereby increasing the distance between the heat sealing roller 2 and the forming tube 8, and achieving the rebound of the heat sealing roller 2.

[0036] The heat sealing roller 2 is connected to a heating structure, which is used to heat the heat sealing roller 2. Since this part is existing technology, it will not be described here in detail.

[0037] During use, first install the forming tube 8, then wrap the packaging film over it, with some overlap, facing the heat sealing roller 2. Manually adjust the position of the support roller 1 and the forming tube 8 so that the gap between them is the thickness of one layer of packaging film. Once adjusted, tighten the first nut 65 to secure the support roller 1 in place. Then, manually press the heat sealing roller 2 to maintain the gap between them at the thickness of one to two layers of packaging film. Once adjusted, tighten the second nut 75. This will ensure that the second limit bolt 74 limits the distance between the heat sealing roller 2 and the forming tube 8 to no less than the reserved gap. Activate the cylinder 762, causing it to push against the side support plate 77, preventing the distance between the heat sealing roller 2 and the forming tube 8 from exceeding the reserved gap. Then, start the longitudinal sealing machine. Under the action of the first gear 51 and the second gear 52, the support roller 1 and the heat sealing roller 2 move at equal speeds, rotate in opposite directions, and press firmly against the packaging film. Therefore, the support roller 1 and the heat-sealing roller 2 can simultaneously pull the packaging film in both the front and rear directions, ensuring that the packaging film will not wrinkle or tear. The support roller 1 also has another important function. When the heat-sealing roller 2 is pressed against the forming tube 8, without the support roller 2, the forming tube 8 will shift due to the pressure, resulting in appearance defects of the packaging bag, uneven sealing pressure, and uncontrollable packaging quality.

[0038] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A synchronous double-drum longitudinal sealing support structure, characterized in that: It comprises a supporting roller (1), a heat-sealing roller (2), a first universal joint (3), a second universal joint (4), a linkage assembly (5), a first adjustment assembly (6) and a second adjustment assembly (7); One end of the support roller (1) is connected to one end of the first universal coupling (3), the other end of the first universal coupling (3) is connected to the linkage assembly (5), the linkage assembly (5) is also connected to one end of the second universal coupling (4), the linkage assembly (5) drives the first universal coupling (3) and the second universal coupling (4) to rotate synchronously and in opposite directions, the other end of the second universal coupling (4) is connected to the heat sealing roller (2), and a vertical forming tube (8) is provided between the heat sealing roller (2) and the support roller (1); The first adjustment component (6) is sleeved on the outside of the support roller (1), and the first adjustment component (6) is used to adjust the distance between the support roller (1) and the forming tube (8); The second adjustment component (7) is sleeved on the outside of the heat sealing roller (2), and the second adjustment component (7) is used to adjust the distance between the heat sealing roller (2) and the forming tube (8).

2. A synchronous double-drum longitudinal sealing support structure according to claim 1, characterized in that: The linkage assembly (5) comprises a first gear (51) and a second gear (52); The first gear (51) is key-connected to the first universal coupling (3), the first gear (51) is meshed with the second gear (52), and the second gear (52) is key-connected to the second universal coupling (4).

3. A synchronous double-drum longitudinal sealing support structure according to claim 2, characterized in that: The first gear (51) and the second gear (52) are synchronous gears.

4. The synchronous double-drum longitudinal sealing support structure according to claim 1, characterized in that: The first adjustment component (6) comprises a first bearing seat (61), a first bottom plate (62), and a first rotating shaft seat (63); The first bearing seat (61) is sleeved on the outer side of the supporting roller (1); the bottom of the first bearing seat (61) is fixedly connected to one end of the first bottom plate (62); the other end of the first bottom plate (62) is rotatably connected to the first rotating shaft seat (63); the first bottom plate (62) is fixedly provided with a pushing block (621); the first rotating shaft seat (63) is fixedly provided with a pushing plate (631); the pushing plate (631) is limitedly connected to a first limiting bolt (64); the first limiting bolt (64) abuts against the pushing block (621).

5. A synchronous double-drum longitudinal sealing support structure according to claim 4, characterized in that: The first limiting bolt (64) is connected to the push plate (631) in a limiting manner via two first nuts (65).

6. The synchronous double-drum longitudinal sealing support structure according to claim 1, characterized in that: The second adjustment assembly (7) comprises a second bearing seat (71), a second bottom plate (72) and a second rotating shaft seat (73); The second bearing seat (71) is sleeved on the outer side of the heat-sealing roller (2); the bottom of the second bearing seat (71) is fixedly connected to one end of the second bottom plate (72); the other end of the second bottom plate (72) is rotatably connected to the second rotating shaft seat (73); the second rotating shaft seat (73) is fixedly connected to a top block (731); the second bottom plate (72) is fixedly provided with a top plate (721); the top plate (721) is limit-connected to a second limit bolt (74); the second limit bolt (74) abuts against the top block (731).

7. A synchronous double-drum longitudinal sealing support structure according to claim 6, characterized in that: The second limiting bolt (74) is threadedly connected to a second nut (75), and the second nut (75) abuts against the top plate (721).

8. A synchronous double-drum longitudinal sealing support structure according to claim 6 or 7, characterized in that: A side support plate (77) is fixedly connected to the side wall of the second bearing seat (71), and the side support plate (77) is away from the supporting roller (1).

9. A synchronous double-drum longitudinal sealing support structure according to claim 8, characterized in that: The second adjustment assembly (7) further comprises a limiting component (76), wherein the limiting component (76) comprises a mounting frame (761), a cylinder (762), an adjustment rod (763) and a spring (764); The cylinder (762) is fixedly connected to the mounting frame (761), and the telescopic end of the cylinder (762) abuts against one end of the side support plate (77); The other end of the side support plate (77) is in contact with a spring (764), the spring (764) is sleeved on the outside of the adjustment rod (763), and the adjustment rod (763) is fixedly connected to the mounting frame (761).

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