Strip package follow-up longitudinal sealing mechanism and strip package machine

Abstract

The strip package follow-up longitudinal sealing mechanism comprises a rack, a follow-up lifting module and longitudinal sealing modules, one or more longitudinal sealing modules are connected to the follow-up lifting module, and each longitudinal sealing module comprises a mounting frame, a longitudinal sealing driving assembly, a first longitudinal sealing clamping block, a first hot ironing block, a second longitudinal sealing clamping block and a second hot ironing block. The middle position of the first longitudinal sealing clamping block and the middle position of the second longitudinal sealing clamping block are installed on the installation frame through a rotating shaft, so that the first longitudinal sealing clamping block and the second longitudinal sealing clamping block form a lever structure with the rotating shaft as a fulcrum, and the first hot ironing block and the second hot ironing block are fixed to the second end of the first longitudinal sealing clamping block and the second end of the second longitudinal sealing clamping block respectively; the longitudinal sealing driving assembly comprises an air cylinder and a push block, and the push block is pushed by the air cylinder to enter the position between the first end of the first longitudinal sealing clamping block and the first end of the second longitudinal sealing clamping block so that the two hot ironing blocks can get close to each other for heat sealing. According to the invention, the carton can be continuously operated without pause during carton production, the production speed is improved, the carton cannot be damaged during heat sealing, the adjustment is convenient, and the overall structure is compact.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and in particular to a strip pack follower longitudinal sealing mechanism and a strip packing machine. Background Art

[0002] Strip bagging machines are mainly used for packaging granules, powders and liquid materials. The main processes include conveying packaging film, guiding strip bag forming, sealing the longitudinal edges of strip bags, sealing the transverse edges of strip bags, filling materials, dividing strip bags, cutting easy-to-tear edges and rejecting defective products. Strip bagging machines can package single-row strip bags at a time, or produce multiple rows of strip bags at a time. The longitudinal sealing mechanism of the strip bag is mainly used to heat seal the longitudinal edges of the strip bags after forming. At present, the longitudinal sealing method of the strip bag generally relies on a hot stamping block for heat sealing, or one hot stamping block is fixed and the other is moved to compress or loosen the heat seal. There are problems such as incomplete heat sealing and poor heat sealing effect. The hot stamping block is too close to the strip bag, which is easy to cause damage to the strip bag. In addition, the existing longitudinal sealing mechanism has a complex structure and a large volume. For multi-row strip bagging machines, there is a problem of difficult layout. Moreover, the existing longitudinal sealing mechanism is generally fixed on the frame, and the longitudinal edge of the strip bag is clamped for longitudinal sealing when the strip bag passes through. The strip bag needs to stay at the longitudinal sealing position, resulting in a discontinuous strip bag production process, a slow production speed, and a pulling phenomenon when the strip bag passes through, affecting the quality of the strip bag. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned shortcomings of the prior art and to provide a strip pack follow-up longitudinal sealing mechanism which can produce strip packs without stopping, has good heat sealing effect and compact structure, and a strip packing machine using the follow-up longitudinal sealing mechanism.

[0004] The present invention is achieved through the following technical solutions:

[0005] A strip bag follow-up longitudinal sealing mechanism comprises a frame, a follow-up lifting module and a longitudinal sealing module, wherein the follow-up lifting module is installed on the frame, the longitudinal sealing module is connected to the follow-up lifting module, and the longitudinal sealing module is follow-up lifted along the frame under the drive of the follow-up lifting module; the longitudinal sealing module comprises a mounting frame, a longitudinal sealing drive assembly, a first longitudinal sealing clamp, a first hot-stamping block, a second longitudinal sealing clamp and a second hot-stamping block, the longitudinal sealing drive assembly is installed on the mounting frame, the first longitudinal sealing clamp and the second longitudinal sealing clamp are arranged opposite to each other, and the middle position of the first longitudinal sealing clamp and the second longitudinal sealing clamp form a lever structure with the rotating shaft as a fulcrum, and the first longitudinal sealing clamp and the second longitudinal sealing clamp both have a first end and a second end separated by the rotating shaft, and the first end of the first longitudinal sealing clamp and the second longitudinal sealing clamp are connected to each other with respect to each other. The first ends of the clamping blocks are opposite to each other, and the second end of the first longitudinal sealing clamping block is opposite to the second end of the second longitudinal sealing clamping block. When the first end of the first longitudinal sealing clamping block and the first end of the second longitudinal sealing clamping block are far away from each other, the second end of the first longitudinal sealing clamping block and the second end of the second longitudinal sealing clamping block are close to each other. When the first end of the first longitudinal sealing clamping block and the first end of the second longitudinal sealing clamping block are close to each other, the second end of the first longitudinal sealing clamping block and the second end of the second longitudinal sealing clamping block are separated from each other; the first hot stamping block is fixed on the second end of the first longitudinal sealing clamping block, and the second hot stamping block is fixed on the second end of the second longitudinal sealing clamping block. The longitudinal sealing drive assembly is arranged at the first ends of the first longitudinal sealing clamping block and the second longitudinal sealing clamping block, and is used to drive the first end of the first longitudinal sealing clamping block and the first end of the second longitudinal sealing clamping block to move away from each other, so that the first hot stamping block and the second hot stamping block are close to each other, thereby longitudinally sealing the strip bag.

[0006] Furthermore, the longitudinal sealing drive assembly includes a cylinder and a push block, the cylinder is installed on the frame, the push block is fixed on the telescopic end of the cylinder, and is located in the middle position between the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block. The push block enters between the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block under the push of the cylinder, so that the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block are separated from each other, and the first hot stamping block and the second hot stamping block are close to each other to clamp the longitudinal seal.

[0007] Furthermore, the front end section of the push block is triangular, and the two sides of the front end triangle are in contact with the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block respectively. The first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block slide along the two sides of the front end triangle of the push block and gradually move away from each other as the cylinder pushes them. Adjustable clamping force

[0008] Furthermore, a connecting column is provided on the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block, and rollers are installed on the connecting column that can roll in contact with the two sides of the front end triangle of the push block. The two sides of the front end triangle of the push block respectively roll between the two rollers to gradually move the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block away from each other.

[0009] Furthermore, a return spring is connected between the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block. The return spring brings the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block closer to each other through elastic restoring force, thereby making the second end of the first longitudinal sealing block and the second end of the second longitudinal sealing block move away from each other, and the first hot stamping block and the second hot stamping block separate from each other to complete the longitudinal sealing.

[0010] Furthermore, a protrusion extending outward is provided at the edge of the middle position of the first longitudinal sealing clamp block and the second longitudinal sealing clamp block, and the rotating shaft is connected to the protrusion.

[0011] Furthermore, the follow-up lifting module includes a driving motor, a driving wheel, a driven wheel and a toothed belt, the driving motor, the driving wheel and the driven wheel are installed on the frame, the two driven wheels are arranged opposite to each other up and down, the toothed belt is wrapped around the driving wheel and the driven wheel, the mounting frame is connected to the vertical gear belt between the two driven wheels, and the driving motor drives the mounting frame on the toothed belt to move up and down, thereby driving the longitudinal sealing module to follow up and down along the frame.

[0012] Furthermore, the longitudinal sealing modules have several groups arranged side by side along the frame, the mounting frames on the several groups of longitudinal sealing modules are fixed side by side on the connecting frame, the connecting frame is connected to the follow-up lifting module, and the connecting frame drives the several groups of longitudinal sealing modules to rise and fall synchronously under the drive of the follow-up lifting module.

[0013] Furthermore, the connecting frame is provided with a slider, and the frame is provided with a slide rail matched with the slider, and the connecting frame is lifted and lowered along the frame through the cooperation between the slider and the slide rail.

[0014] A strip bag machine adopts the above-mentioned strip bag follow-up longitudinal sealing mechanism, and also includes a strip bag guiding and forming module, the strip bag guiding and forming module is used to guide the strip bag film into a strip bag shape and produce longitudinal edges, the strip bag guiding and forming module is fixed on the frame and is opposite to the longitudinal sealing module, so that the longitudinal sealing module can perform follow-up longitudinal sealing on the longitudinal edges on the strip bag.

[0015] The present invention is provided with a follow-up lifting module to drive the longitudinal sealing module to rise and fall, so that the longitudinal sealing module can descend together with the strip bag film, and longitudinally seal synchronously during the follow-up, so that the strip bags can be continuously operated without pausing during production, thereby improving the production speed, avoiding the pulling problem caused by sudden start-up during the strip bag production process, and improving the quality of the strip bags; two longitudinal sealing clamping blocks with a lever structure are arranged on the longitudinal sealing module, and the two longitudinal sealing clamping blocks are driven to approach each other in a cam manner, so that the two hot stamping blocks press the longitudinal edges of the strip bags for longitudinal sealing; the lever structure can make the two hot stamping blocks move synchronously to approach or move away, and the opened opening is larger, which can be away from the strip bag film to avoid scalding the strip bags; the cam-type driving structure can make the overall structure compact, which is convenient for side-by-side layout on a multi-row strip bag machine; the structure of the triangular push block can adjust the pressing force during longitudinal sealing by adjusting the stroke size of the push block, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the front structure of an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the side structure of an embodiment of the present invention.

[0019] Figure 4 for Figure 2 Cross-sectional view along the AA direction.

[0020] Figure 5 It is a schematic diagram of the structural layout of multiple groups of vertical sealing modules in an embodiment of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the clamping state of the longitudinal sealing module in an embodiment of the present invention.

[0022] Figure 7 It is a top view schematically showing the clamping state of the longitudinal sealing module in an embodiment of the present invention.

[0023] Figure 8 It is a side schematic diagram of the clamping state of the longitudinal sealing module in an embodiment of the present invention.

[0024] Fig. 9 for Figure 8 Stereoscopic cross-sectional view along the BB direction.

[0025] Fig.10 for Figure 8 Plane section view along the BB direction.

[0026] Fig.11 It is a structural schematic diagram of the longitudinal sealing module in the open state in an embodiment of the present invention.

[0027] Fig.12It is a top view schematic diagram of the longitudinal sealing module in the open state according to the embodiment of the present invention.

[0028] Fig.13 It is a side schematic diagram of the longitudinal sealing module in the open state according to the embodiment of the present invention.

[0029] Fig.14 for Fig.13 Stereoscopic cross-sectional view in the CC direction.

[0030] Fig.15 for Fig.13 Plane section view in CC direction.

[0031] Figure numerals: 1-frame; 2-follow-up lifting module; 3-longitudinal sealing module; 4-connecting frame; 10-strip bag guiding and forming module; 11-slide rail; 21-driving motor; 22-driving wheel; 23-driven wheel; 24-toothed belt; 31-mounting frame; 32-cylinder; 33-push block; 34-first longitudinal sealing clamping block; 35-first hot stamping block; 36-second longitudinal sealing clamping block; 37-second hot stamping block; 38-return spring; 311-rotating shaft; 341-first roller; 342-first connecting column; 343-first protrusion; 361-second roller; 362-second connecting column; 351-first heating tube; 371-second heating tube; 41-slider. DETAILED DESCRIPTION

[0032] A strip package follow-up longitudinal sealing mechanism, such as Figures 1 to 4 , including a frame 1, a follow-up lifting module 2 and a longitudinal sealing module 3, the follow-up lifting module 2 is installed on the frame 1, the longitudinal sealing module 3 is connected to the follow-up lifting module 2, and the longitudinal sealing module 3 is lifted and lowered along the frame 1 under the drive of the follow-up lifting module 2.

[0033] The longitudinal sealing module 3 is used to heat seal the longitudinal edges of the strip packs. A single longitudinal sealing module 3 can be provided to longitudinally seal a single row of strip packs, and is suitable for a single row strip packing machine. Figure 1 , Figure 2 , Figure 5 , multiple groups of longitudinal sealing modules 3 are arranged side by side along the frame 1 to adapt to the production of multiple rows of strip packs. The structure of the longitudinal sealing modules 3 is compact. Specifically, several groups of mounting frames 31 on the longitudinal sealing modules 3 are fixed side by side on the connecting frame 4. The connecting frame 4 is connected to the follow-up lifting module 2. The connecting frame 4 drives several groups of longitudinal sealing modules 3 to rise and fall synchronously under the drive of the follow-up lifting module 2. The connecting frame 4 is provided with a slider 41, and the frame 1 is provided with a slide rail 11 adapted to the slider 41. The connecting frame 4 rises and falls along the frame 1 through the cooperation between the slider 41 and the slide rail 11.

[0034] like Figures 6 to 15As shown, the longitudinal sealing module 3 includes a mounting frame 31, a longitudinal sealing drive assembly, a first longitudinal sealing clamp block 34, a first hot stamping block 35, a second longitudinal sealing clamp block 36 and a second hot stamping block 37. The longitudinal sealing drive assembly is mounted on the mounting frame 31. The first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 are arranged opposite to each other. Fig.10 , Fig.15 The middle positions of the two are mounted on the mounting frame 31 through the rotating shaft 311, so that the first longitudinal sealing clamp 34 and the second longitudinal sealing clamp 36 form a lever structure with the rotating shaft 311 as a fulcrum, and the first longitudinal sealing clamp 34 and the second longitudinal sealing clamp 36 have a first end and a second end respectively separated by the rotating shaft 311, and the first end of the first longitudinal sealing clamp 34 is opposite to the first end of the second longitudinal sealing clamp 36, and the second end of the first longitudinal sealing clamp 34 is opposite to the second end of the second longitudinal sealing clamp 36, as shown in FIG. Figures 6 to 10 When the first end of the first longitudinal sealing clamp block 34 and the first end of the second longitudinal sealing clamp block 36 are away from each other, the second end of the first longitudinal sealing clamp block 34 and the second end of the second longitudinal sealing clamp block 36 are close to each other. Figures 11 to 15 When the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 are close to each other, the second end of the first longitudinal sealing clamp 34 and the second end of the second longitudinal sealing clamp 36 are separated from each other. The first hot stamping block 35 is fixed on the second end of the first longitudinal sealing clamp 34, and the second hot stamping block 37 is fixed on the second end of the second longitudinal sealing clamp 36. The longitudinal sealing driving assembly is arranged at the first ends of the first longitudinal sealing clamp 34 and the second longitudinal sealing clamp 36, and is used to drive the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 to move away from each other, so that the second end of the first longitudinal sealing clamp 34 and the second end of the second longitudinal sealing clamp 36 are close to each other, and the first hot stamping block 35 and the second hot stamping block 37 are close to each other, so as to longitudinally seal the strip bag. The first hot stamping block 35 and the second hot stamping block 37 are both provided with heating pipes, which are the first heating pipe 351 and the second heating pipe 371 respectively.

[0035] In order to make the first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 form a lever structure with one end open and the other end closed, in this embodiment, Fig.10 , Fig.15 , the edges of the middle positions of the first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 are both provided with outwardly extending protrusions, which are respectively the first protrusion 343 and the second protrusion, the rotating shaft 311 is connected to the protrusions, and the protrusions on the first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 are installed on the same rotating shaft 311. The first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 can be designed to have a bending structure with a certain angle.

[0036] The longitudinal sealing module 3 of the present invention can be raised and lowered under the drive of the follow-up lifting module 2, and the longitudinal edges are longitudinally sealed as the strip packaging film descends, thereby avoiding pauses in the strip packaging production process and improving the production speed. The structure of the longitudinal sealing module 3 allows the two hot stamping blocks to be open to each other and away from the strip packaging film when not performing heat sealing, and the opening is large, which has little impact on the strip packaging film, avoids heat radiation damage to the strip packaging, and has a compact overall structure.

[0037] The function of the longitudinal sealing drive assembly is to make the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 move away from each other, and the cylinder 32 can be used to push the two ends to open the two ends. In this embodiment, the longitudinal sealing drive assembly includes a cylinder 32 and a push block 33, the cylinder 32 is installed on the frame 1, the push block 33 is fixed on the telescopic end of the cylinder 32, and is located at the middle position of the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36. The push block 33 enters between the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 under the push of the cylinder 32, so that the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 move away from each other, and the first hot stamping block 35 and the second hot stamping block 37 are close to each other to clamp the longitudinal sealing.

[0038] As one of the implementation modes, the front end section of the push block 33 of this embodiment is triangular, and the two sides of the front end triangle are in contact with the first end of the first longitudinal sealing clamp block 34 and the first end of the second longitudinal sealing clamp block 36 respectively. The first end of the first longitudinal sealing clamp block 34 and the first end of the second longitudinal sealing clamp block 36 slide along the two sides of the front end triangle of the push block 33 as the cylinder 32 pushes and gradually moves away from each other. This structure can make the first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 move smoothly, and the pressing force between the first hot stamping block 35 and the second hot stamping block 37 can be adjusted by adjusting the movement stroke of the push block 33.

[0039] In order to smoothly push the push block 33, rollers that can roll in contact with the two sides of the front triangle of the push block 33 are installed on the first end of the first longitudinal sealing clamp block 34 and the first end of the second longitudinal sealing clamp block 36, respectively, and the first roller 341 and the second roller 361 are installed. The two sides of the front triangle of the push block 33 roll with the first roller 341 and the second roller 361 respectively, so that the first end of the first longitudinal sealing clamp block 34 and the first end of the second longitudinal sealing clamp block 36 gradually move away from each other. In this embodiment, the first longitudinal sealing clamp block 34 and the second longitudinal sealing clamp block 36 are both provided with connecting columns, respectively, the first connecting column 342 and the second connecting column 362, and the first roller 341 and the second roller 361 are installed on the first connecting column 342 and the second connecting column 362, respectively.

[0040] In order to separate the first hot stamping block 35 and the second hot stamping block 37 from each other after heat sealing, a return structure is required, such as a tension spring or other elastic member at the position of the rotating shaft 311. In this embodiment, a return spring 38 is connected between the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36. The return spring 38 brings the first end of the first longitudinal sealing clamp 34 and the first end of the second longitudinal sealing clamp 36 closer to each other through elastic restoring force, thereby moving the second end of the first longitudinal sealing clamp 34 and the second end of the second longitudinal sealing clamp 36 away from each other, and the first hot stamping block 35 and the second hot stamping block 37 are separated from each other, completing the longitudinal sealing.

[0041] The function of the follow-up lifting module 2 is to drive the longitudinal sealing module 3 to lift, and it can be a commonly used lifting drive structure, such as a structure in which a motor drives a lead screw. Figure 3 , Figure 4 The follow-up lifting module 2 includes a driving motor 21, a driving wheel 22, a driven wheel 23 and a toothed belt 24. The driving motor 21, the driving wheel 22 and the driven wheel 23 are installed on the frame 1. The two driven wheels 23 are arranged opposite to each other up and down. The toothed belt 24 is wrapped around the driving wheel 22 and the driven wheel 23. The mounting frame 31 is fixed on the vertical gear belt between the two driven wheels 23. The driving motor 21 drives the mounting frame 31 on the toothed belt 24 to move up and down, thereby driving the longitudinal sealing module 3 to follow up and down along the frame 1.

[0042] A strip packing machine adopts the strip packing follow-up longitudinal sealing mechanism, such as Figures 1 to 4 , further comprising a strip bag guiding and forming module 10, the strip bag guiding and forming module 10 is used to guide the strip bag film into a strip bag shape and generate longitudinal edges, the strip bag guiding and forming module 10 is fixed on the frame 1 and is opposite to the longitudinal sealing module 3, so that the longitudinal sealing module 3 can perform follow-up longitudinal sealing on the longitudinal edges of the strip bags. If multiple rows of strip bags are produced, the strip bag guiding and forming module 10 is also provided with corresponding multiple groups.

[0043] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A strip package follow-up longitudinal sealing mechanism, characterized in that: The invention comprises a frame, a follow-up lifting module and a longitudinal sealing module, wherein the follow-up lifting module is installed on the frame, the longitudinal sealing module is connected to the follow-up lifting module, and the longitudinal sealing module is followed and lifted along the frame under the drive of the follow-up lifting module; the longitudinal sealing module comprises a mounting frame, a longitudinal sealing driving assembly, a first longitudinal sealing clamp, a first hot-stamping block, a second longitudinal sealing clamp and a second hot-stamping block, the longitudinal sealing driving assembly is installed on the mounting frame, the first longitudinal sealing clamp and the second longitudinal sealing clamp are arranged opposite to each other, and the middle positions of the two are installed on the mounting frame through a rotating shaft, so that the first longitudinal sealing clamp and the second longitudinal sealing clamp form a lever structure with the rotating shaft as a fulcrum, and the first longitudinal sealing clamp and the second longitudinal sealing clamp both have a first end and a second end as the boundary with the rotating shaft, and the first end of the first longitudinal sealing clamp and the first end of the second longitudinal sealing clamp are respectively Relatively speaking, the second end of the first longitudinal sealing block is opposite to the second end of the second longitudinal sealing block. When the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block move away from each other, the second end of the first longitudinal sealing block and the second end of the second longitudinal sealing block approach each other. When the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block approach each other, the second end of the first longitudinal sealing block and the second end of the second longitudinal sealing block are separated from each other. The first hot stamping block is fixed on the second end of the first longitudinal sealing block, and the second hot stamping block is fixed on the second end of the second longitudinal sealing block. The longitudinal sealing drive assembly is arranged at the first ends of the first longitudinal sealing block and the second longitudinal sealing block, and is used to drive the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block to move away from each other, so that the first hot stamping block and the second hot stamping block approach each other, thereby longitudinally sealing the strip package.

2. A strip package follow-up longitudinal sealing mechanism according to claim 1, characterized in that: The longitudinal sealing drive assembly includes a cylinder and a push block. The cylinder is installed on the frame. The push block is fixed on the telescopic end of the cylinder and is located in the middle position between the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block. The push block enters between the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block under the push of the cylinder, so that the first end of the first longitudinal sealing clamp block and the first end of the second longitudinal sealing clamp block are separated from each other.

3. A strip package follow-up longitudinal sealing mechanism according to claim 2, characterized in that: The front end cross-section of the push block is triangular, and the two sides of the front end triangle are respectively in contact with the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block. The first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block slide along the two sides of the front end triangle of the push block as the cylinder pushes and gradually moves away from each other.

4. A strip package follow-up longitudinal sealing mechanism according to claim 3, characterized in that: The first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block are both provided with connecting columns, and rollers that can roll with the two sides of the front end triangle of the push block are installed on the connecting columns. The two sides of the front end triangle of the push block respectively roll between the two rollers to gradually move the first end of the first longitudinal sealing block and the first end of the second longitudinal sealing block away from each other.

5. The strip package follower longitudinal sealing mechanism according to claim 1, characterized in that: A return spring is connected between the first end of the first longitudinal sealing clamp and the first end of the second longitudinal sealing clamp. The return spring brings the first end of the first longitudinal sealing clamp and the first end of the second longitudinal sealing clamp closer to each other through elastic restoring force, thereby making the second end of the first longitudinal sealing clamp and the second end of the second longitudinal sealing clamp move away from each other, and the first hot stamping block and the second hot stamping block separate from each other to complete the longitudinal sealing.

6. A strip package follower longitudinal sealing mechanism according to claim 1, characterized in that: The edges of the middle positions of the first longitudinal sealing clamp block and the second longitudinal sealing clamp block are both provided with outwardly extending protrusions, and the rotating shaft is connected to the protrusions.

7. The strip package follower longitudinal sealing mechanism according to claim 1, characterized in that: The follow-up lifting module includes a driving motor, a driving wheel, a driven wheel and a toothed belt. The driving motor, the driving wheel and the driven wheel are installed on the frame. The two driven wheels are arranged opposite to each other up and down. The toothed belt is wrapped around the driving wheel and the driven wheel. The mounting frame is connected to the vertical gear belt between the two driven wheels. The driving motor drives the mounting frame on the toothed belt to move up and down, thereby driving the longitudinal sealing module to follow up and down along the frame.

8. A strip package follower longitudinal sealing mechanism according to any one of claims 1 to 7, characterized in that: The longitudinal sealing modules have several groups arranged side by side along the frame, and the mounting frames on the longitudinal sealing modules are fixed side by side on the connecting frame, and the connecting frame is connected to the follow-up lifting module. The connecting frame drives the longitudinal sealing modules to rise and fall synchronously under the drive of the follow-up lifting module.

9. A strip package follow-up longitudinal sealing mechanism according to claim 8, characterized in that: The connecting frame is provided with a sliding block, and the frame is provided with a sliding rail matched with the sliding block. The connecting frame is lifted and lowered along the frame through the cooperation between the sliding block and the sliding rail.

10. A strip packing machine, using the strip pack follower longitudinal sealing mechanism according to any one of claims 1 to 9, characterized in that: It also includes a strip package guiding and forming module, which is used to guide the strip package film into a strip package shape and produce longitudinal edges. The strip package guiding and forming module is fixed on the frame and is opposite to the longitudinal sealing module to facilitate the longitudinal sealing module to perform follow-up longitudinal sealing on the longitudinal edges of the strip package.

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