A longitudinal sealing device

Abstract

The utility model discloses a longitudinal sealing device, including a frame, an openable and closable ironing block mechanism for preheating packaging materials, and a pressing wheel mechanism for sealing the preheated packaging materials. The frame is provided with a forming tube and a longitudinal sealing driving mechanism. The ironing block mechanism is located at the side of the forming tube and is connected to the longitudinal sealing driving mechanism to be close to or away from the forming tube. The pressing wheel mechanism is arranged on the frame and is located below the ironing block mechanism. The forming tube guides the packaging materials to pass through the ironing block mechanism and the pressing wheel mechanism in sequence from top to bottom. The ironing block mechanism preheats the packaging materials, and the pressing wheel mechanism longitudinally seals the preheated packaging materials. The two mechanisms can act simultaneously, thereby realizing continuous longitudinal sealing, which is beneficial to improving production efficiency. The ironing block mechanism is connected to the longitudinal sealing driving mechanism. When the equipment is shut down or maintenance is required, the longitudinal sealing driving mechanism drives the ironing block mechanism to be away from the forming tube and the packaging materials to avoid problems such as overheating and wrinkling of the packaging materials. The structure is simple and effective.

Description

Technical Field

[0001] The utility model relates to the technical field of food and medicine packaging machinery, in particular to a longitudinal sealing device. Background Art

[0002] Prior application CN214524811U discloses a longitudinal sealing device for a strip bag machine, which uses a servo motor to drive a screw rod to rotate, thereby driving a sliding frame threadedly connected to the screw rod and a hot-pressing sealing mechanism thereon to move back and forth, and when the hot block of the hot-pressing sealing mechanism contacts the edge of the film roll on the film roll forming mechanism, the edge of the film roll is heated and pressed to complete the sealing. Since the hot-pressing sealing mechanism needs to complete two processes of heating and pressing, the required time is relatively long, which is not conducive to further improving the production efficiency of the longitudinal sealing device for the strip bag machine. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a longitudinal sealing device which has a simple structure and can realize continuous production, thereby further improving production efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A longitudinal sealing device comprises a frame, an openable and closable ironing block mechanism for preheating packaging materials, and a pressing wheel mechanism for sealing the preheated packaging materials. The frame is provided with a forming tube and a longitudinal sealing drive mechanism. The ironing block mechanism is located on the side of the forming tube and is connected to the longitudinal sealing drive mechanism to approach or move away from the forming tube. The pressing wheel mechanism is arranged on the frame and below the ironing block mechanism.

[0006] As a further improvement of the above technical solution: the ironing block mechanism includes a first mounting seat connected to the longitudinal sealing drive mechanism, a plurality of pairs of ironing blocks distributed along the length direction of the first mounting seat, and an opening and closing drive member for driving each pair of the ironing blocks to open and close.

[0007] As a further improvement of the above technical solution: a first elastic member is provided between two adjacent pairs of the ironing blocks, a first elastic member is also provided between the ironing blocks on both sides and the first mounting seat, a connecting arm is provided on the ironing block, the connecting arms of each pair of ironing blocks are cross-arranged and connected to the first mounting seat through a pin shaft, a second mounting seat is provided on the side of the first mounting seat away from the forming tube, a plurality of V-shaped blocks are provided on the second mounting seat, the plurality of V-shaped blocks are arranged one-to-one correspondingly to the plurality of pairs of the ironing blocks, and the opening and closing drive member is connected to the second mounting seat to make the V-shaped block approach or move away from the connecting arm.

[0008] As a further improvement of the above technical solution: at least one of the connecting arms is provided with a rolling element.

[0009] As a further improvement of the above technical solution: a plurality of first adjusting screws are provided on the second mounting seat, and the plurality of first adjusting screws are connected to the plurality of V-shaped blocks in a one-to-one correspondence.

[0010] As a further improvement of the above technical solution: the opening and closing driving member is a cylinder and is arranged at both ends of the second mounting seat, the cylinder body of the cylinder is connected to the second mounting seat, and the piston rod of the cylinder is connected to the first mounting seat.

[0011] As a further improvement of the above technical solution: the pressing wheel mechanism includes a third mounting seat connected to the frame and a plurality of pairs of sealing pressing wheels distributed along the length direction of the third mounting seat.

[0012] As a further improvement of the above technical solution: each pair of the sealing rollers includes a concentric shaft roller and an eccentric shaft roller, a channel for the packaging material to pass through is formed between the concentric shaft roller and the eccentric shaft roller, an adjustment block is provided on the wheel axle of the eccentric shaft roller, a second adjustment screw and a second elastic member are provided on the third mounting seat, the second adjustment screw abuts against the adjustment block, and the second elastic member is connected to the adjustment block.

[0013] As a further improvement of the above technical solution: a pressing block and a pressing wheel are provided on the frame, the forming tube passes through the pressing block, the pressing block is located below the pressing wheel mechanism, and the pressing wheel is located below the pressing block.

[0014] As a further improvement of the above technical solution: the longitudinal sealing drive mechanism includes two groups of drive components and are respectively arranged at the two ends of the ironing block mechanism, the drive components include a drive block, a guide rod and a telescopic drive member, the guide rod and the telescopic drive member are arranged on the frame, the telescopic drive member is connected to one end of the guide rod, the drive block is arranged at the other end of the guide rod, one end of the ironing block mechanism is hinged to one of the drive blocks, and the other end of the ironing block mechanism is connected to the other drive block through a locking pin.

[0015] Compared with the prior art, the advantages of the utility model are: in the longitudinal sealing device disclosed by the utility model, the forming tube guides the packaging material from top to bottom through the ironing block mechanism and the pressing wheel mechanism in sequence, the ironing block mechanism is closed to preheat the packaging material, and after the preheating is completed, the ironing block mechanism is opened to release the packaging material, and the pressing wheel mechanism longitudinally seals the preheated packaging material, and the two mechanisms can act simultaneously to achieve continuous longitudinal sealing, which is beneficial to improving production efficiency; the ironing block mechanism is connected to the longitudinal sealing drive mechanism, and when the equipment is shut down or maintenance is required, the longitudinal sealing drive mechanism drives the ironing block mechanism away from the forming tube and the packaging material to avoid problems such as overheating and wrinkling of the packaging material, and the structure is simple and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the longitudinal sealing device of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the longitudinal sealing drive mechanism in the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the forming tube, the edge pressing block and the edge pressing wheel in the utility model.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the ironing block mechanism in the utility model.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the pressing wheel mechanism in the utility model.

[0021] The symbols in the figure represent:

[0022] 1. Frame; 2. Forming tube; 3. Longitudinal sealing drive mechanism; 31. Drive block; 32. Guide rod; 33. Telescopic drive member; 4. Ironing block mechanism; 41. First mounting seat; 42. Ironing block; 421. Connecting arm; 43. Second mounting seat; 44. Opening and closing drive member; 45. First elastic member; 46. Pin shaft; 47. V-shaped block; 48. Rolling member; 49. First adjusting screw; 5. Pressing wheel mechanism; 51. Third mounting seat; 52. Sealing pressing wheel; 521. Concentric shaft pressing wheel; 522. Eccentric shaft pressing wheel; 53. Adjusting block; 54. Second adjusting screw; 55. Second elastic member; 6. Edge pressing block; 7. Edge pressing wheel; 8. Locking pin. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Figures 1 to 5 An embodiment of the longitudinal sealing device of the utility model is shown. The longitudinal sealing device of this embodiment includes a frame 1, and also includes an openable and closable ironing block mechanism 4 for preheating the packaging material and a pressing wheel mechanism 5 for sealing the preheated packaging material. A forming tube 2 and a longitudinal sealing drive mechanism 3 are provided on the frame 1. The ironing block mechanism 4 is located on the side of the forming tube 2 and is connected to the longitudinal sealing drive mechanism 3 to approach or move away from the forming tube 2. The pressing wheel mechanism 5 is arranged on the frame 1 and below the ironing block mechanism 4.

[0028] In the longitudinal sealing device of this embodiment, the forming tube 2 guides the packaging material from top to bottom through the ironing block mechanism 4 and the pressing wheel mechanism 5 in sequence. The ironing block mechanism 4 is closed to preheat the packaging material. After the preheating is completed, the ironing block mechanism 4 is opened to release the packaging material, and the pressing wheel mechanism 5 longitudinally seals the preheated packaging material. The two mechanisms can act simultaneously to achieve continuous longitudinal sealing, which is beneficial to improving production efficiency. The ironing block mechanism 4 is connected to the longitudinal sealing drive mechanism 3. When the equipment is shut down or maintenance is required, the longitudinal sealing drive mechanism 3 drives the ironing block mechanism 4 away from the forming tube 2 and the packaging material to avoid problems such as overheating and wrinkling of the packaging material. The structure is simple and effective.

[0029] Furthermore, in this embodiment, the ironing block mechanism 4 includes a first mounting seat 41 connected to the longitudinal sealing drive mechanism 3, a plurality of ironing blocks 42 distributed along the length direction of the first mounting seat 41, and an opening and closing driving member 44 for driving the opening and closing of each ironing block 42. After the packaging material is in place, the opening and closing driving member 44 drives each ironing block 42 to close, thereby clamping the packaging material for preheating. After the preheating is completed, each ironing block 42 is opened to facilitate the downward movement of the packaging material, so that multiple rows of packaging materials can be preheated at the same time.

[0030] See Figure 4Furthermore, in this embodiment, a first elastic member 45 is provided between two adjacent pairs of ironing blocks 42, and a first elastic member 45 is also provided between the ironing blocks 42 on both sides and the first mounting seat 41. A connecting arm 421 is provided on the ironing block 42, and the connecting arms 421 of each pair of ironing blocks 42 are arranged crosswise and connected to the first mounting seat 41 through a pin 46. A second mounting seat 43 is provided on the side of the first mounting seat 41 away from the forming tube 2, and a plurality of V-shaped blocks 47 are provided on the second mounting seat 43. The plurality of V-shaped blocks 47 are arranged one-to-one with the plurality of pairs of ironing blocks 42, and the opening and closing driving member 44 is connected to the second mounting seat 43 to make the V-shaped blocks 47 approach or move away from the connecting arm 421. Preferably, the first elastic member 45 is a coil spring, and both ends of the coil spring are connected to the ironing block 42 through a hook portion. Of course, in other embodiments, the first elastic member 45 can also be an elastic rope, an elastic block, etc., and each pair of ironing blocks 42 can automatically restore the open state through the first elastic member 45. After the packaging material is in place, the opening and closing driving member 44 drives each V-shaped block 47 to gradually approach the connecting arm 421 through the second mounting seat 43, so that each pair of connecting arms 421 are close to each other. Since the connecting arms 421 of each pair of ironing blocks 42 are arranged crosswise and connected to the first mounting seat 41 through the pin 46, each pair of ironing blocks 42 are also close to each other, thereby clamping the packaging material for preheating. After preheating is completed, the opening and closing driving member 44 drives each V-shaped block 47 to gradually move away from the connecting arm 421 through the second mounting seat 43. After the connecting arm 421 is separated from the V-shaped block 47, each pair of ironing blocks 42 automatically opens under the elastic force of the first elastic member 45. This method can keep the left and right ironing blocks 42 balanced during the preheating process, avoiding the problem of different or poor sealing on both sides due to different forces on both sides.

[0031] Preferably, at least one connecting arm 421 is provided with a rolling element 48. The rolling element 48 may be, for example, a roller or a rolling bearing, etc. The provision of the rolling element 48 can reduce the friction resistance and wear when contacting with the V-shaped block 47, making the closing process of each ironing block 42 smoother.

[0032] Furthermore, in this embodiment, a plurality of first adjusting screws 49 are provided on the second mounting seat 43, and the plurality of first adjusting screws 49 are connected one by one with the plurality of V-shaped blocks 47. By rotating the first adjusting screws 49, the distance between the corresponding V-shaped block 47 and the connecting arm 421 can be fine-tuned, so that the gap size of each ironing block 42 when closed is kept consistent, thereby ensuring the consistent longitudinal sealing effect of each row of packaging materials, and each ironing block 42 can be adjusted separately, with a simple and effective structure.

[0033] As a preferred embodiment, the opening and closing driving member 44 is a cylinder and is disposed at both ends of the second mounting seat 43, with good symmetry and balance, which is conducive to ensuring the stable operation of the hot block mechanism 4. The cylinder body of the cylinder is connected to the second mounting seat 43, and the piston rod of the cylinder is connected to the first mounting seat 41. As the piston rod of the cylinder is extended and retracted, the second mounting seat 43 and the accessories thereon can be driven to approach or move away from the first mounting seat 41, and the structure is simple and reasonable. Of course, in other embodiments, the opening and closing driving member 44 can also be a screw nut pair, a gear rack pair, etc.

[0034] Furthermore, in this embodiment, the pressing wheel mechanism 5 includes a third mounting seat 51 connected to the frame 1 and a plurality of pairs of sealing pressing wheels 52 distributed along the length direction of the third mounting seat 51. After the preheated packaging material moves downward into position, each pair of sealing pressing wheels 52 longitudinally seals the packaging material. Preferably, both ends of the third mounting seat 51 are mounted on the frame 1 by threaded fasteners for easy assembly and disassembly.

[0035] See Figure 5 Furthermore, in this embodiment, each pair of sealing rollers 52 includes a concentric shaft roller 521 and an eccentric shaft roller 522, and a passage for the packaging material to pass through is formed between the concentric shaft roller 521 and the eccentric shaft roller 522. An adjustment block 53 is provided on the axle of the eccentric shaft roller 522, and a second adjustment screw 54 and a second elastic member 55 are provided on the third mounting seat 51. The second adjustment screw 54 abuts against the adjustment block 53, and the second elastic member 55 is connected to the adjustment block 53. Preferably, the second elastic member 55 is a coil spring, and both ends of the coil spring are connected to the third mounting seat 51 and the adjustment block 53 through a hook portion. Of course, in other embodiments, the second elastic member 55 can also be an elastic rope, an elastic block, etc. When the depths of the longitudinal sealing indentations of each row of packaging materials are inconsistent, the second adjusting screw 54 can be rotated to push the adjusting block 53 to rotate, thereby driving the eccentric shaft pressing wheel 522 to rotate, so as to achieve the purpose of adjusting the pressure of the eccentric shaft pressing wheel 522, and each pair of sealing pressing wheels 52 can be adjusted separately, and the second elastic member 55 can realize the elastic locking of the position of the adjusting block 53, and the structure is reasonable and effective.

[0036] See Figure 2 Furthermore, in this embodiment, a press block 6 and a press wheel 7 are provided on the frame 1, the forming tube 2 passes through the press block 6, the press block 6 is located below the press wheel mechanism 5, and the press wheel 7 is located below the press block 6. The press block 6 is used to make the vertical edge of the strip package have a flattened prototype, and then the press wheel 7 completely flattens the vertical edge of the strip package.

[0037] See Figure 1 and Figure 2In this embodiment, the longitudinal sealing drive mechanism 3 includes two sets of drive components and is disposed at both ends of the ironing block mechanism 4, which has good symmetry and balance, and is conducive to realizing the overall synchronous movement of the ironing block mechanism 4. The drive components include a drive block 31, a guide rod 32 and a telescopic drive member 33. The guide rod 32 and the telescopic drive member 33 are disposed on the frame 1. The telescopic drive member 33 is connected to one end of the guide rod 32. The drive block 31 is disposed at the other end of the guide rod 32. One end of the ironing block mechanism 4 (specifically, the first mounting seat 41) is hinged to one of the drive blocks 31, and the other end of the ironing block mechanism 4 is connected to the other drive block 31 through a lock pin 8. Among them, the telescopic drive member 33 is preferably a cylinder. Of course, in other embodiments, it can also be a screw nut pair, a gear rack pair, etc. When maintenance is required, the ironing blocks 42 are opened and no longer clamp the packaging materials. Then the telescopic driving member 33 drives the guide rod 32, the driving block 31 on the guide rod 32 and the ironing block mechanism 4 to move as a whole to the side away from the forming tube 2. After moving into place, the locking pin 8 is taken out, and the ironing block mechanism 4 can be rotated as a whole around the hinge part, so that the ironing blocks 42 are exposed, which is convenient for cleaning and maintenance. The structure is reasonable and effective.

[0038] Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A longitudinal sealing device, comprising a frame (1), characterized in that: It also comprises an openable and closable ironing block mechanism (4) for preheating the packaging material and a pressing wheel mechanism (5) for sealing the preheated packaging material. The frame (1) is provided with a forming tube (2) and a longitudinal sealing drive mechanism (3). The ironing block mechanism (4) is located on the side of the forming tube (2) and is connected to the longitudinal sealing drive mechanism (3) to be close to or away from the forming tube (2). The pressing wheel mechanism (5) is provided on the frame (1) and is located below the ironing block mechanism (4).

2. The longitudinal sealing device according to claim 1, characterized in that: The ironing block mechanism (4) comprises a first mounting seat (41) connected to the longitudinal sealing drive mechanism (3), a plurality of pairs of ironing blocks (42) distributed along the length direction of the first mounting seat (41), and an opening and closing drive member (44) for driving each pair of the ironing blocks (42) to open and close.

3. The longitudinal sealing device according to claim 2, characterized in that: A first elastic member (45) is provided between two adjacent pairs of the ironing blocks (42), and a first elastic member (45) is also provided between the ironing blocks (42) on both sides and the first mounting seat (41). A connecting arm (421) is provided on the ironing block (42), and the connecting arms (421) of each pair of ironing blocks (42) are cross-arranged and connected to the first mounting seat (41) through a pin shaft (46). A second mounting seat (43) is provided on the side of the first mounting seat (41) away from the forming tube (2), and a plurality of V-shaped blocks (47) are provided on the second mounting seat (43). The plurality of V-shaped blocks (47) are arranged one-to-one correspondingly to the plurality of pairs of the ironing blocks (42), and the opening and closing driving member (44) is connected to the second mounting seat (43) so that the V-shaped block (47) is close to or away from the connecting arm (421).

4. The longitudinal sealing device according to claim 3, characterized in that: At least one of the connecting arms (421) is provided with a rolling element (48).

5. The longitudinal sealing device according to claim 3, characterized in that: The second mounting seat (43) is provided with a plurality of first adjusting screws (49), and the plurality of first adjusting screws (49) are connected to the plurality of V-shaped blocks (47) in a one-to-one correspondence.

6. The longitudinal sealing device according to claim 3, characterized in that: The opening and closing driving member (44) is a cylinder and is disposed at both ends of the second mounting seat (43); the cylinder body of the cylinder is connected to the second mounting seat (43), and the piston rod of the cylinder is connected to the first mounting seat (41).

7. The longitudinal sealing device according to claim 1, characterized in that: The pressing wheel mechanism (5) comprises a third mounting seat (51) connected to the frame (1) and a plurality of pairs of sealing pressing wheels (52) distributed along the length direction of the third mounting seat (51).

8. The longitudinal sealing device according to claim 7, characterized in that: Each pair of the sealing pressing wheels (52) comprises a concentric shaft pressing wheel (521) and an eccentric shaft pressing wheel (522), a passage for the packaging material to pass through is formed between the concentric shaft pressing wheel (521) and the eccentric shaft pressing wheel (522), an adjusting block (53) is provided on the wheel axle of the eccentric shaft pressing wheel (522), a second adjusting screw (54) and a second elastic member (55) are provided on the third mounting seat (51), the second adjusting screw (54) is in contact with the adjusting block (53), and the second elastic member (55) is connected to the adjusting block (53).

9. The longitudinal sealing device according to claim 1, characterized in that: The frame (1) is provided with a pressing block (6) and a pressing wheel (7); the forming tube (2) passes through the pressing block (6); the pressing block (6) is located below the pressing wheel mechanism (5); and the pressing wheel (7) is located below the pressing block (6).

10. The longitudinal sealing device according to any one of claims 1 to 9, characterized in that: The longitudinal sealing drive mechanism (3) comprises two groups of drive components which are respectively arranged at the two ends of the ironing block mechanism (4); the drive components comprise a drive block (31), a guide rod (32) and a telescopic drive member (33); the guide rod (32) and the telescopic drive member (33) are arranged on the frame (1); the telescopic drive member (33) is connected to one end of the guide rod (32); the drive block (31) is arranged at the other end of the guide rod (32); one end of the ironing block mechanism (4) is hinged to one of the drive blocks (31); and the other end of the ironing block mechanism (4) is connected to the other drive block (31) via a locking pin (8).

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