Longitudinal sealing structure of thermal shrinkage film

Abstract

The utility model provides a heat shrink film longitudinal sealing structure, which belongs to the field of packaging sealing equipment and comprises a fixed press-fit structure, a movable press-fit structure is mounted on one side of the fixed press-fit structure in a sliding close or far-away manner, and synchronous belts are arranged on the fixed press-fit structure and the movable press-fit structure and are matched with each other to clamp and convey a heat shrink film. A cutter air cylinder is further fixedly arranged on the movable press-fit structure, a rectangular heat-sealing cutter is fixedly installed at the telescopic end of the cutter air cylinder, the cutter air cylinder drives the heat-sealing cutter to be close to and press the heat-sealing heat shrinkage film, and normal press-fit of the heat-sealing heat shrinkage film during operation of the heat shrinkage film is achieved. When the heat shrink film does not run, the heat shrink film is away from the heat shrink film, damage to the heat shrink film caused by continuous heating of the same position of the heat shrink film is avoided, an up-down adjusting structure is arranged, heat shrink films of different specifications and sizes can be conveniently adapted, and the heat shrink film heat-sealing device has the advantages of being good in heat-sealing packaging effect and high in universality.

Description

Technical Field

[0001] The utility model belongs to the field of packaging sealing equipment, and particularly relates to a longitudinal sealing structure for heat shrinkable films. Background Art

[0002] The longitudinal sealing structure for heat shrinkable films is a heat sealing structure used for sealing heat shrinkable films. This structure melts and tightly combines two or more layers of materials of the heat shrinkable film at specific positions through high temperature to form a continuous and firm sealing line.

[0003] Most of the existing longitudinal sealing structures for heat shrinkable films adopt a wheel cutting longitudinal sealing structure. This structure lacks flexibility. The heat sealing cutter is fixedly arranged. When the heat shrinkable film is not running, the heat sealing cutter will continuously heat and press the same part of the heat shrinkable film, resulting in the heat shrinkable film being over-sewn and damaged, affecting the packaging effect. Content of the Utility Model

[0004] Based on the above problems in the prior art, the utility model provides a longitudinal sealing structure for heat shrinkable films, which includes a fixed pressing structure. A movable pressing structure is installed on one side of the fixed pressing structure to slide close to or away from it. Synchronous belts are arranged on both the fixed pressing structure and the movable pressing structure and cooperate with each other to clamp and convey the heat shrinkable film. A cutter cylinder is also fixedly arranged on the movable pressing structure. A rectangular heat sealing cutter is fixedly installed at the telescopic end of the cutter cylinder. The heat sealing cutter is driven by the cutter cylinder to approach and press the heat shrinkable film for heat sealing.

[0005] Among them, the longitudinal sealing structure for heat shrinkable films also includes an up-and-down adjustment structure. The up-and-down adjustment structure includes two lifting guide frames. The lifting guide frames are provided with vertical optical axes extending up and down. A sliding frame is arranged on the vertical optical axes. The same mounting beam is fixedly installed on the sliding frames of the two lifting guide frames. Both the fixed pressing structure and the movable pressing structure are installed on the mounting beam. The same mounting plate is fixedly installed at the tops of the two lifting guide frames. An adjustment screw is rotatably installed on the mounting plate. The adjustment screw is threadedly connected to the mounting beam. The mounting beam is driven to rise or fall by rotating the adjustment screw.

[0006] Among them, the fixed pressing structure includes a fixed seat fixedly connected to the mounting beam. A first clamping plate is fixedly installed on the lower surface of the fixed seat. Synchronous wheels are rotatably installed on both sides of the first clamping plate. A synchronous belt is sleeved on the two synchronous wheels. The two ends of the synchronous belt are respectively sleeved on the two synchronous wheels in a reversing manner to form a closed-loop structure. A synchronous gear is fixedly installed on the rotating shaft of one of the synchronous wheels. The synchronous gear is connected to an external driving motor.

[0007] The movable pressing structure includes a fixed frame fixedly connected to the mounting beam, a horizontal optical axis is fixedly installed on the fixed frame, a horizontal sliding block is slidably installed on the horizontal optical axis, a movable plate is fixedly installed on the horizontal sliding block, and a pressing motor that drives the movable plate to slide along the horizontal optical axis is also fixedly installed on the fixed frame, a second clamping plate matching the first clamping plate is fixedly installed on the movable plate, and the cutting cylinder is fixedly installed on one side of the movable plate, and the heat sealing cutter passes through a limiting groove arranged on the second clamping plate and extends toward the first clamping plate, and synchronous wheels are rotatably installed on both sides of the second clamping plate, and synchronous belts are sleeved on the two synchronous wheels, and two ends of the synchronous belt are respectively reversibly sleeved with the two synchronous wheels to form a closed-loop structure, and a synchronous gear is fixedly installed on the rotating shaft of one of the synchronous wheels, and the synchronous gear of the movable pressing structure is meshed with the synchronous gear of the fixed pressing structure.

[0008] Wherein, the first clamping plate is provided with a clearance groove matching the heat sealing cutter, and the heat sealing cutter is inserted into the clearance groove when the heat sealing heat shrink film is pressed.

[0009] A turntable is fixedly mounted on the power output end of the pressing motor, one end of a push rod is eccentrically and rotatably mounted on the turntable, and the other end of the push rod is rotatably connected to the moving plate.

[0010] Among them, the mounting beam is provided with a horizontally extending adjustment groove, a nut is slidably installed in the adjustment groove, the fixing frame is fixedly installed to the mounting beam through the cooperation of bolts and nuts, and an adjusting screw is rotatably installed at one end of the mounting beam, the adjusting screw and the fixing frame are threadedly connected, and the fixing frame is driven to slide by rotating the adjusting screw.

[0011] Wherein, an adjustment frame is fixedly mounted on the telescopic end of the cutter cylinder, and the heat sealing cutter is fixedly mounted on the adjustment frame.

[0012] The utility model has the beneficial effects:

[0013] 1. A cutter cylinder is provided, which drives the heat sealing cutter close to or away from the heat shrink film, so that the heat shrink film can be pressed and heat-sealed normally when the heat shrink film is running, and the heat shrink film can be kept away from the heat shrink film when the heat shrink film is not running to avoid continuous heating of the same part of the heat shrink film and causing damage to the heat shrink film.

[0014] 2. An upper and lower adjustment structure is provided, through which the positions of the fixed pressing structure and the movable pressing structure are adjusted, so as to adapt to heat shrink films of different specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a heat shrink film longitudinal sealing structure.

[0016] Figure 2It is a three-dimensional structure schematic diagram of the up-and-down adjustment structure.

[0017] Figure 3 It is a schematic diagram of the cooperation between the fixed pressing structure and the movable pressing structure.

[0018] Figure 4 It is a three-dimensional structure schematic diagram of the fixed pressing structure.

[0019] Figure 5 It is a three-dimensional structure schematic diagram of the movable pressing structure.

[0020] Figure 6 It is a three-dimensional structure schematic diagram of the movable pressing structure from another angle.

[0021] Figure 7 It is a three-dimensional structure schematic diagram of a longitudinal sealing structure of a heat shrinkable film, with a heat shrinkable film bag.

[0022] Figure 8 It is a three-dimensional structure schematic diagram of a longitudinal sealing structure of a heat shrinkable film from another angle, with a heat shrinkable film bag. Specific embodiments

[0023] The following describes the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0024] As shown in the attached Figures 1-6 A longitudinal sealing structure of a heat shrinkable film, which includes an up-and-down adjustment structure 1, a fixed pressing structure 2 and a movable pressing structure 3. The up-and-down adjustment structure 1 includes two lifting guide frames 4. Each lifting guide frame 4 is provided with two vertically extending vertical optical axes 5 that are parallel to each other. A same sliding frame 6 is arranged on the two vertical optical axes 5. The same mounting beam 7 is fixedly installed on the sliding frames 6 of the two lifting guide frames 4. The fixed pressing structure 2 and the movable pressing structure 3 are both installed on the mounting beam 7. The movable pressing structure 3 is located on one side of the fixed pressing structure 2 and can slide close to or away from the fixed pressing structure 2. The same mounting plate 8 is fixedly installed at the top of the two lifting guide frames 4. An adjusting screw 9 is rotatably installed on the mounting plate 8. The adjusting screw 9 is threadedly connected to the mounting beam 7. A corrugated handle is fixedly installed at the upper end of the adjusting screw 9. By rotating the adjusting screw 9, the mounting beam 7 is driven to rise or fall.

[0025] As a preferred embodiment, the fixed pressing structure 2 includes a fixed seat 10 fixedly connected to the mounting beam 7, a first clamping plate 11 is fixedly installed on the lower surface of the fixed seat 10, and synchronous wheels 12 are rotatably installed on both sides of the first clamping plate 11, and two synchronous belts 13 parallel to each other are sleeved on the two synchronous wheels 12, and the two ends of each synchronous belt 13 are respectively sleeved with the two synchronous wheels 12 in a reversing manner to form a closed-loop structure, and a synchronous gear 14 is fixedly installed on the rotating shaft of one of the synchronous wheels 12, and the synchronous gear 14 is connected to the turbine of the worm gear box 15 through a transmission chain (not shown in the figure), and the worm is further connected to a transmission sprocket 16, and the transmission sprocket 16 is connected to an external driving motor, and a rod sleeve 17 is rotatably sleeved on the worm, and a stabilizing slider 18 is fixedly installed on the end of the rod sleeve 17 away from the synchronous gear 14, and the stabilizing slider 18 is slidably connected to the fixed plate of the production line through a stabilizing slide rail 19 extending up and down, so as to improve the stability of the worm gear following the up and down sliding.

[0026] The movable pressing structure 3 includes a fixed frame 20 fixedly connected to the mounting beam 7, two mutually parallel horizontal optical axes 21 are fixedly installed on the fixed frame 20, a horizontal slider 22 is slidably installed on each horizontal optical axis 21, the same movable plate 23 is fixedly installed on the two horizontal sliders 22, a pressing motor (not shown in the figure) is also fixedly installed on the fixed frame 20, a turntable 24 is fixedly installed on the power output end of the pressing motor, one end of a push rod 25 is eccentrically and rotatably installed on the turntable 24, the other end of the push rod 25 is rotatably connected to the movable plate 23, and the movable plate 23 is driven by the pressing motor to slide along the horizontal optical axis 21; a second clamping plate 26 matching the first clamping plate 11 is fixedly installed on the movable plate 23, a cutter cylinder 27 is fixedly installed on one side of the second clamping plate 26 of the movable plate 23, an adjusting frame 28 is fixedly installed on the telescopic end of the cutter cylinder 27, a heat sealing cutter 29 is fixedly installed on the adjusting frame 28, and the cutter cylinder 27 drives the movable plate 23 to move along the horizontal optical axis 21. The movable heat sealing cutter 29 approaches and presses the heat-sealed heat shrinkable film 30, and the heat sealing cutter 29 passes through the limiting groove arranged on the second clamping plate 26 and extends to the first clamping plate 11. The first clamping plate 11 is provided with a clearance groove 31 matching the heat sealing cutter 29, and the heat sealing cutter 29 is inserted into the clearance groove 31 when pressing the heat-sealed heat shrinkable film 30; the second clamping plate 26 is rotatably installed with synchronous wheels 12 on both sides, and two mutually parallel synchronous belts 13 are sleeved on the two synchronous wheels 12, and the two ends of each synchronous belt 13 are respectively sleeved with the two synchronous wheels 12 to form a closed-loop structure, and a synchronous gear 14 is fixedly installed on the rotating shaft of one of the synchronous wheels 12, and the synchronous gear 14 of the movable pressing structure 3 is meshed with the synchronous gear 14 of the fixed pressing structure 2, so that all the synchronous belts 13 are driven to move synchronously by a driving motor, and the synchronous belts 13 on the fixed pressing structure 2 and the movable pressing structure 3 cooperate with each other to clamp and transport the heat shrinkable film 30,

[0027] As a preferred embodiment, an adjustment groove 32 extending horizontally is provided on the mounting beam 7. A nut is slidably installed in the adjustment groove 32. The fixing bracket 20 is fixedly installed on the mounting beam 7 through the cooperation of a bolt and the nut. When the bolt is loosened and does not completely disengage from the nut, the fixing bracket 20 can slide on the mounting beam 7. One end of the mounting beam 7 is also rotatably installed with an adjustment screw 33. The adjustment screw 33 is threadedly connected to the fixing bracket 20. One end of the adjustment screw 33 is also fixedly installed with a corrugated handle. By rotating the adjustment screw 33, the fixing bracket 20 is driven to slide, so that the position of the fixing bracket 20 can be adjusted according to actual needs, thereby improving the overall versatility and adaptability of the structure.

[0028] The longitudinal heat-sealing structure of the heat-shrinkable film provided in this embodiment is a part of the packaging production line and is installed downstream of the bagging structure. The corresponding product is put into the heat-shrinkable film 30 packaging bag by the upstream structure, or the heat-shrinkable film 30 is covered on the corresponding product by the upstream structure, and then is conveyed to the lower part of the longitudinal heat-sealing structure of the heat-shrinkable film through the conveying structure for press-fitting and heat-sealing of the heat-shrinkable film 30, as Figure 7 and 8 shown. The heat-shrinkable film bag in the figure is only a structural schematic, and the actual size of the heat-shrinkable film bag is determined by the corresponding product.

[0029] During use, first adjust the positions of the movable press-fitting structure 3 and the fixed press-fitting structure 2 according to actual needs by adjusting the structure 1 and the adjustment screw 33 up and down, and then start working. The open heat-shrinkable film bag is conveyed to the corresponding position. The pressing motor drives the moving plate 23 and related structures to approach the fixed press-fitting structure 2, and presses the opening edge of the heat-shrinkable film bag through the synchronous belt 13. Then, the driving sprocket 16 conveys external power to the synchronous gear 14 and the synchronous pulley 12 through the worm and gear structure, and the synchronous pulley 12 drives the synchronous belt 13 to run synchronously to realize auxiliary conveying of the heat-shrinkable film bag. When it is necessary to press-fit and heat-seal, the cutter cylinder 27 drives the heat-sealing cutter 29 to approach the heat-shrinkable film bag and performs press-fitting and heat-sealing on the heat-shrinkable film bag. When the heat-shrinkable film bag stops being conveyed, the cutter cylinder 27 drives the heat-sealing cutter 29 away from the heat-shrinkable film bag to avoid continuously heating the same place of the heat-shrinkable film and causing the heat-shrinkable film to be damaged. The waste film 35 cut by the heat-sealing cutter 29 is separated by the waste material mechanism 34.

[0030] The above-described embodiments only represent one implementation manner of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A heat shrinkable film longitudinal sealing structure, characterized in that: The invention comprises a fixed pressing structure (2), a movable pressing structure (3) is installed on one side of the fixed pressing structure (2) so as to slide towards or away from the fixed pressing structure (2), a synchronous belt (13) is provided on both the fixed pressing structure (2) and the movable pressing structure (3) and cooperates with each other to clamp and transport a heat shrink film, a cutter cylinder (27) is also fixedly provided on the movable pressing structure (3), a rectangular heat sealing cutter (29) is fixedly provided on the telescopic end of the cutter cylinder (27), and the heat sealing cutter (29) is driven by the cutter cylinder (27) to approach and press the heat sealing heat shrink film (30).

2. A heat shrinkable film longitudinal sealing structure according to claim 1, characterized in that: The utility model also comprises an up-down adjustment structure (1), wherein the up-down adjustment structure (1) comprises two lifting guide frames (4), the lifting guide frames (4) are provided with a vertical optical axis (5) extending up and down, a sliding frame (6) is provided on the vertical optical axis (5), the sliding frames (6) of the two lifting guide frames (4) are fixedly mounted with a same mounting beam (7), the fixed pressing structure (2) and the movable pressing structure (3) are both mounted on the mounting beam (7), the tops of the two lifting guide frames (4) are fixedly mounted with a same mounting plate (8), an adjusting screw (9) is rotatably mounted on the mounting plate (8), the adjusting screw (9) is threadedly connected to the mounting beam (7), and the mounting beam (7) is driven to rise or fall by rotating the adjusting screw (9).

3. A heat shrinkable film longitudinal sealing structure according to claim 2, characterized in that: The fixed pressing structure (2) comprises a fixed seat (10) fixedly connected to the mounting beam (7), a first clamping plate (11) fixedly mounted on the lower surface of the fixed seat (10), synchronous wheels (12) rotatably mounted on both sides of the first clamping plate (11), a synchronous belt (13) sleeved on the two synchronous wheels (12), two ends of the synchronous belt (13) are respectively sleeved with the two synchronous wheels (12) in a reversing manner to form a closed loop structure, a synchronous gear (14) fixedly mounted on the rotating shaft of one of the synchronous wheels (12), and the synchronous gear (14) is connected to an external driving motor.

4. A heat shrinkable film longitudinal sealing structure according to claim 3, characterized in that: The movable pressing structure (3) comprises a fixing frame (20) fixedly connected to the mounting beam (7), a horizontal optical axis (21) being fixedly mounted on the fixing frame (20), a horizontal sliding block (22) being slidably mounted on the horizontal optical axis (21), a moving plate (23) being fixedly mounted on the horizontal sliding block (22), a pressing motor for driving the moving plate (23) to slide along the horizontal optical axis (21) being also fixedly mounted on the fixing frame (20), a second clamping plate (26) matching the first clamping plate (11) being fixedly mounted on the moving plate (23), and a second clamping plate (26) being fixedly mounted on one side of the second clamping plate (26) The cutter cylinder (27) and the heat-sealing cutter (29) pass through the limiting groove arranged on the second clamping plate (26) and extend toward the first clamping plate (11). Synchronous wheels (12) are rotatably installed on both sides of the second clamping plate (26). Synchronous belts (13) are sleeved on the two synchronous wheels (12). The two ends of the synchronous belt (13) are respectively sleeved with the two synchronous wheels (12) to form a closed loop structure. A synchronous gear (14) is fixedly installed on the rotating shaft of one of the synchronous wheels (12). The synchronous gear (14) of the movable pressing structure (3) is meshed with the synchronous gear (14) of the fixed pressing structure (2).

5. A heat shrinkable film longitudinal sealing structure according to claim 4, characterized in that: The first clamping plate (11) is provided with a clearance groove (31) matching the heat sealing cutter (29), and the heat sealing cutter (29) is inserted into the clearance groove (31) when pressing the heat-sealed heat shrink film (30).

6. A heat shrinkable film longitudinal sealing structure according to claim 5, characterized in that: A rotating disk (24) is fixedly mounted on the power output end of the pressing motor, one end of a push rod (25) is eccentrically and rotatably mounted on the rotating disk (24), and the other end of the push rod (25) is rotatably connected to the moving plate (23).

7. A heat shrinkable film longitudinal sealing structure according to claim 6, characterized in that: The mounting beam (7) is provided with a horizontally extending adjustment groove (32), a nut is slidably installed in the adjustment groove (32), the fixing frame (20) is fixedly installed on the mounting beam (7) by the cooperation of bolts and nuts, and an adjustment screw rod (33) is rotatably installed on one end of the mounting beam (7), the adjustment screw rod (33) and the fixing frame (20) are threadedly connected, and the fixing frame (20) is driven to slide by rotating the adjustment screw rod (33).

8. A heat shrinkable film longitudinal sealing structure according to claim 7, characterized in that: An adjustment frame (28) is fixedly mounted on the telescopic end of the cutter cylinder (27), and the heat-sealing cutter (29) is fixedly mounted on the adjustment frame (28).

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