Automatic shaping and sealing device for vertical packaging machine

Abstract

The present invention discloses an automatic shaping and sealing device of a vertical packaging machine, comprising a frame and a collar forming device installed on the frame, a transverse sealing mechanism is arranged below the collar forming device; the transverse sealing mechanism comprises a transverse sealing frame, a first slide rail is fixedly connected to the transverse sealing frame, a first transverse sealing block and a second transverse sealing block are slidably connected to the first slide rail, and a heating block is fixedly connected to the first transverse sealing block and the second transverse sealing block; a film supporting mechanism is arranged on the first transverse sealing block and the second transverse sealing block, and the film supporting mechanism pushes and flattens the packaging bag passing through the first transverse sealing block and the second transverse sealing block to both sides. The present invention drives the heating block to seal the packaging bag through the transverse sealing block, and automatically drives the film supporting mechanisms on both sides of the heat sealing gap to flatten the packaging bag film, so as to avoid wrinkles on the packaging bag film when sealing.

Description

Technical Field

[0001] The invention relates to the technical field of packaging machines, and in particular to an automatic shaping and sealing device of a vertical packaging machine. Background Art

[0002] Vertical packaging machine is a highly efficient automatic packaging equipment. It makes roll packaging materials into bags and completes the packaging process by relying on the weight of the materials and mechanical action. It is suitable for packaging materials in various forms such as powder, granules, liquids, etc. It integrates bag making, filling, sealing, cutting and other functions. It is widely used in food, medicine, daily chemical and other industries. It has the advantages of high degree of automation, fast speed, high precision and stable performance. It can significantly improve production efficiency and reduce labor costs. It is an indispensable and important equipment in modern packaging production.

[0003] For example, in the prior art, Chinese patent announcement number CN202670120U discloses a vertical packaging machine, including a frame, a transverse sealing device fixedly connected or slidably connected to the inner wall of the frame, the transverse sealing device including a rear slider and a front slider sleeved on a guide shaft, two ends of the rear transverse sealing fixed seat are respectively pinned to the rear slider, two ends of the front transverse sealing fixed seat are respectively pinned to the front slider, a rear cutter driven by a rear cylinder is arranged in the rear transverse sealing knife seat, a front cutter connecting plate is slidably connected in the front transverse sealing knife seat, a front cutter is fixed on the front cutter connecting plate, the rear slider and the front slider are driven by a transmission device, and the cylinder pushes the rear transverse sealing fixed seat to perform push-pull reciprocating motion under the control of the transmission device. When sealing, this type of vertical packaging machine squeezes the packaging bag through the heating block to heat-seal the bag mouth; when the heating block squeezes the packaging bag, the packaging bag is cylindrical, and the bag film on both sides of the packaging bag is prone to wrinkles during the process of approaching, which leads to an increase in local thickness after sealing, resulting in the failure of sealing, affecting the packaging effect. Summary of the invention

[0004] The object of the present invention is to solve the above technical problems and provide an automatic shaping and sealing device for a vertical packaging machine.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic shaping and sealing device of a vertical packaging machine comprises a frame and a collar forming device installed on the frame, a transverse sealing mechanism is arranged below the collar forming device; the transverse sealing mechanism comprises a transverse sealing frame fixed on the frame, a first slide rail is fixedly connected to the transverse sealing frame, a first transverse sealing block and a second transverse sealing block are slidably connected to the first slide rail, heating blocks are fixedly connected to the opposite side surfaces of the first transverse sealing block and the second transverse sealing block, and a heat-sealing gap is arranged between the heating blocks on the first transverse sealing block and the second transverse sealing block so that the packaging bag passing through the heat-sealing gap is clamped by the heating block for heat-sealing; a film-supporting mechanism is arranged on the first transverse sealing block and the second transverse sealing block, and the film-supporting mechanism pushes and flattens the packaging bag passing through between the first transverse sealing block and the second transverse sealing block to both sides.

[0007] Furthermore, the film-supporting mechanism is symmetrically arranged on the first horizontal sealing block and the second horizontal sealing block, and the film-supporting mechanism includes a second slide rail slidably connected to the first horizontal sealing block or the second horizontal sealing block, and the first film-supporting block and the second film-supporting block are slidably connected to the second slide rail, the first film-supporting block is hingedly connected to a first connecting rod, and the second film-supporting block is hingedly connected to a second connecting rod, the first connecting rod and the second connecting rod are hingedly connected at their ends, and a third connecting rod is hingedly connected at the hinge between the first connecting rod and the second connecting rod, and a first compression spring is arranged between the third connecting rod and the first horizontal sealing block or the second horizontal sealing block.

[0008] Furthermore, the side walls of the first film supporting block and the second film supporting block extend to a gap between the heating blocks and the heat-sealing gap.

[0009] Furthermore, guide rods are fixedly connected to both ends of the second slide rail, and the guide rods are inserted into the first transverse sealing block or the second transverse sealing block and slidably cooperate with the first transverse sealing block or the second transverse sealing block.

[0010] Furthermore, a receiving groove is provided in the first transverse sealing block and the second transverse sealing block, the first compression spring is located in the receiving groove, the end of the third connecting rod is inserted into the receiving groove and slidably cooperates with the receiving groove, and the first compression spring abuts against the end of the third connecting rod.

[0011] Furthermore, a first gear is rotatably connected to the transverse sealing frame, a first rack is fixedly connected to the first transverse sealing block, and a second rack is fixedly connected to the second transverse sealing block. The first rack and the second rack are respectively located on both sides of the first gear and are meshed with the first gear to form a gear and rack transmission. A transverse sealing cylinder is provided on one side of the first transverse sealing block, a piston rod end of the transverse sealing cylinder is fixedly connected to the first transverse sealing block, and a cylinder body end of the transverse sealing cylinder is fixedly connected to the second transverse sealing block.

[0012] Furthermore, a cutting groove is provided in the first horizontal sealing block, a cutting knife is slidably fitted in the cutting groove, a cutting cylinder is installed on the first horizontal sealing block, the piston rod end of the cutting cylinder is fixedly connected to the cutting knife, and an avoidance groove arranged opposite to the cutting knife is provided between the heating blocks on the second horizontal sealing block.

[0013] Furthermore, the frame is provided with a unwinding roller for placing the packaging bag film roll; the interior of the collar forming device is a hollow structure, and the packaging bag film on the unwinding roller passes downward from the upper end of the collar forming device to be formed into a cylindrical form with overlapping and butted edges, and a longitudinal sealing mechanism is provided on one side of the collar forming device, and the longitudinal sealing mechanism heat-seals the longitudinal butt edges of the formed cylindrical packaging bag film, and a film pulling mechanism is provided below the longitudinal sealing mechanism, and the film pulling mechanism is used to pull and move the cylindrical packaging bag downward; the transverse sealing mechanism is provided below the film pulling mechanism.

[0014] Furthermore, the longitudinal sealing mechanism includes a longitudinal sealing frame, on which a first longitudinal sealing block and a second longitudinal sealing block are slidably arranged vertically, and two longitudinal sealing cylinders are installed on the longitudinal sealing frame, wherein a piston rod end of one of the longitudinal sealing cylinders is connected to the first longitudinal sealing block, and wherein a piston rod end of the other longitudinal sealing cylinder is connected to the second longitudinal sealing block, and the piston rod of the longitudinal sealing cylinder telescopically drives the first longitudinal sealing block and the second longitudinal sealing block to move away from or approach each other so as to heat-seal the longitudinal joint of the packaging bag film; the film-drawing mechanism includes a film-drawing frame, on which two groups of driving components are arranged, and the driving components include a first roller and a second roller arranged up and down, and the first roller and the second roller are outer shells of film-drawing conveyor belts, and the two film-drawing conveyor belts of the two groups of driving components are respectively located on both sides of the longitudinal edge sealing of the packaging bag and clamp the longitudinal edge sealing of the packaging bag, and a driving motor is installed on the film-drawing frame, and the driving motor is drivingly connected to the first roller in one group of driving components to drive the first roller to rotate.

[0015] Furthermore, a feeding pipe is provided in the middle of the collar forming device, a feeding hopper is provided at the upper end of the feeding pipe, and the feeding pipe passes through the inner cavity of the collar forming device and extends to above the transverse sealing mechanism.

[0016] The automatic shaping and sealing device of a vertical packaging machine provided by the present invention has the following beneficial effects: the heating block in the transverse sealing mechanism clamps and heat-seals the passing packaging bag, thereby transversely sealing the packaging bag; when the first transverse sealing block and the second transverse sealing block drive the heating block to transversely seal the packaging bag, the film-supporting mechanism is driven to open the packaging bag film to both sides, so that the packaging bag film remains flat when the heating block performs heat sealing, avoiding wrinkles; when the first transverse sealing block and the second transverse sealing block move toward each other, the film-supporting block in the film-supporting mechanism on the first transverse sealing block and the film-supporting block on the second transverse sealing block are automatically driven to move toward each other to clamp and squeeze the packaging bag, and the film-supporting block moves away from the packaging bag and retracts into the first transverse sealing block or the second transverse sealing block. In the two horizontal sealing blocks, at the same time, the film-supporting block retracts so that the third connecting rod squeezes the first compression spring. The elastic force provided by the first compression spring causes the first connecting rod and the second connecting rod to open outward, increasing the angle between the first connecting rod and the second connecting rod, thereby increasing the distance between the first film-supporting block and the second film-supporting block, flattening the packaging bag film clamped therebetween, and when the packaging bag film is flattened, the distance between the first film-supporting block and the second film-supporting block no longer increases, thereby compressing the first compression spring, making it easier for the heating block to contact the packaging bag film for heat sealing; while the horizontal sealing block drives the heating block to seal the packaging bag, it automatically drives the film-supporting mechanisms on both sides of the heat-sealing gap to flatten the packaging bag film, thereby avoiding wrinkles in the packaging bag film during sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 A schematic structural diagram of an automatic shaping and sealing device for a vertical packaging machine provided by the present invention.

[0019] Figure 2 The present invention provides a schematic top view of the internal structure of a transverse sealing mechanism in an automatic shaping and sealing device of a vertical packaging machine.

[0020] Figure 3 for Figure 2 Schematic diagram of the internal structure of the middle horizontal sealing mechanism from the side.

[0021] Figure 4 The present invention provides a schematic top view of the longitudinal sealing mechanism in the automatic shaping and sealing device of a vertical packaging machine.

[0022] Figure 5 The present invention provides a schematic diagram of the left structural view of a film-pulling mechanism in an automatic shaping and sealing device of a vertical packaging machine.

[0023] Figure 6A schematic diagram of the movement direction of the film-supporting mechanisms in the automatic shaping and sealing device of a vertical packaging machine provided by the present invention in which the film-supporting mechanisms contact each other to flatten the packaging bag film.

[0024] Explanation of the reference numerals in the figure: 1, frame; 2, collar forming device; 3, transverse sealing mechanism; 31, transverse sealing frame; 32, first slide rail; 33, first transverse sealing block; 34, second transverse sealing block; 35, heating block; 36, heat sealing gap; 37, receiving groove; 38, first gear; 39, first rack; 310, second rack; 311, transverse sealing cylinder; 312, cutting knife; 313, cutting cylinder; 314, avoidance groove; 4, film supporting mechanism; 41, second slide rail; 42, first Film-supporting block; 43, second film-supporting block; 44, first connecting rod; 45, second connecting rod; 46, third connecting rod; 47, first compression spring; 48, guide rod; 5, unwinding roller; 6, longitudinal sealing mechanism; 61, longitudinal sealing frame; 62, first longitudinal sealing block; 63, second longitudinal sealing block; 64, longitudinal sealing cylinder; 7, film-drawing mechanism; 71, film-drawing frame; 72, first roller; 73, second roller; 74, film-drawing conveyor belt; 75, driving motor; 8, feeding pipe; 81, feeding hopper. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0028] like Figure 1-Figure 6As shown, an automatic shaping and sealing device of a vertical packaging machine includes a frame 1 and a collar forming device 2 installed on the frame 1, and a transverse sealing mechanism 3 is arranged below the collar forming device 2; the transverse sealing mechanism 3 includes a transverse sealing frame 31 fixed on the frame 1, and a first slide rail 32 is fixedly connected to the transverse sealing frame 31, and a first transverse sealing block 33 and a second transverse sealing block 34 are slidably connected to the first slide rail 32, and heating blocks 35 are fixedly connected to the opposite side surfaces of the first transverse sealing block 33 and the second transverse sealing block 34, and a heat sealing gap 36 is arranged between the heating blocks 35 on the first transverse sealing block 33 and the second transverse sealing block 34 so that the packaging bag passing through the heat sealing gap 36 is clamped by the heating block 35 for heat sealing; the first transverse sealing block 33 and the second transverse sealing block 34 are both provided with a film supporting mechanism 4, and the film supporting mechanism 4 pushes and flattens the packaging bag passing through the first transverse sealing block 33 and the second transverse sealing block 34 to both sides.

[0029] By adopting the above technical scheme, the heating block 35 in the transverse sealing mechanism 3 clamps and heat-seals the passing packaging bag, thereby sealing the packaging bag transversely; when the first transverse sealing block 33 and the second transverse sealing block 34 drive the heating block 35 to seal the packaging bag transversely, the film-stretching mechanism 4 is driven to stretch the packaging bag film to both sides, so that the packaging bag film remains flat when the heating block 35 performs heat sealing, avoiding wrinkles.

[0030] The film-supporting mechanism 4 is symmetrically arranged on the first transverse sealing block 33 and the second transverse sealing block 34, and the film-supporting mechanism 4 includes a second slide rail 41 slidably connected to the first transverse sealing block 33 or the second transverse sealing block 34, and the first film-supporting block 42 and the second film-supporting block 43 are slidably connected to the second slide rail 41, the first film-supporting block 42 is hingedly connected to the first connecting rod 44, and the second film-supporting block 43 is hingedly connected to the second connecting rod 45, the first connecting rod 44 and the second connecting rod 45 are hingedly connected at the ends, and the third connecting rod 46 is hingedly connected at the hinge between the first connecting rod 44 and the second connecting rod 45, and a first compression spring 47 is arranged between the third connecting rod 46 and the first transverse sealing block 33 or the second transverse sealing block 34. When the first transverse sealing block 33 and the second transverse sealing block 34 move toward each other, the film-supporting block in the film-supporting mechanism 4 on the first transverse sealing block 33 and the film-supporting block on the second transverse sealing block 34 are automatically driven to move toward each other to clamp and squeeze the packaging bag. The film-supporting block moves away from the packaging bag and retracts into the first transverse sealing block 33 or the second transverse sealing block 34. At the same time, the film-supporting block retracts so that the third connecting rod 46 squeezes the first compression spring 47. The elastic force provided by the first compression spring 47 causes the first connecting rod 44 and the second connecting rod 45 to open outward, and the angle between the first connecting rod 44 and the second connecting rod 45 increases, thereby increasing the distance between the first film-supporting block 42 and the second film-supporting block 43, flattening the packaging bag film clamped therebetween, and when the packaging bag film is flattened, the distance between the first film-supporting block 42 and the second film-supporting block 43 no longer increases, thereby compressing the first compression spring 47, so that the heating block 35 is in contact with the packaging bag film for heat sealing. Thus, the transverse sealing block drives the heating block 35 to seal the packaging bag, and automatically drives the film-supporting mechanisms 4 on both sides of the heat-sealing gap 36 to flatten the packaging bag film, thereby preventing wrinkles from occurring on the packaging bag film during sealing.

[0031] The side walls of the first film supporting block 42 and the second film supporting block 43 extend to the heat sealing gap 36 between the heating block 35 and the packaging bag film. Therefore, before the heating block 35 contacts the packaging bag film, the first film supporting block 42 and the second film supporting block 43 contact the packaging bag film and flatten the packaging bag film, thereby ensuring that the packaging bag film remains flat when the heating block 35 is heat-sealed.

[0032] The two ends of the second slide rail 41 are fixedly connected with guide rods 48, which are inserted into the first transverse sealing block 33 or the second transverse sealing block 34 and slideably cooperate with the first transverse sealing block 33 or the second transverse sealing block 34. The first film supporting block 42 and the second film supporting block 43 are kept moving in parallel by the sliding cooperation of the guide rods 48, so that the side surfaces of the first film supporting block 42 and the second film supporting block 43 close to the heat sealing gap 36 are kept moving in parallel, which is beneficial to flattening the packaging film.

[0033] The first transverse sealing block 33 and the second transverse sealing block 34 are provided with a receiving groove 37, the first compression spring 47 is located in the receiving groove 37, the end of the third connecting rod 46 is inserted into the receiving groove 37 and slidably cooperates with the receiving groove 37, and the first compression spring 47 abuts against the end of the third connecting rod 46. The receiving groove 37 and the third connecting rod 46 are slidably cooperated, so as to keep the moving direction of the third connecting rod 46 consistent, and when the angle between the first connecting rod 44 and the second connecting rod 45 cannot be expanded, the third connecting rod 46 is automatically squeezed so that the third connecting rod 46 squeezes the first compression spring 47, and the first compression spring 47 contracts, so that the second slide rail 41 drives the first film support block 42 and the second film support block 43 to shrink and move away from the heat sealing gap 36.

[0034] The first gear 38 is rotatably connected to the transverse sealing frame 31, the first gear rack 39 is fixedly connected to the first transverse sealing block 33, and the second gear rack 310 is fixedly connected to the second transverse sealing block 34. The first gear rack 39 and the second gear rack 310 are respectively located on both sides of the first gear 38 and mesh with the first gear 38 to form a gear rack transmission. A transverse sealing cylinder 311 is provided on one side of the first transverse sealing block 33, and the piston rod end of the transverse sealing cylinder 311 is fixedly connected to the first transverse sealing block 33, and the cylinder end of the transverse sealing cylinder 311 is fixedly connected to the second transverse sealing block 34. The transverse sealing cylinder 311 drives the first transverse sealing block 33 and the second transverse sealing block 34 to move relatively close to or away from each other, thereby completing the sealing action, and the first gear 38 cooperates with the first gear rack 39 and the second gear rack 310 to make the first transverse sealing block 33 and the second transverse sealing block 34 move synchronously, so as to prevent the packaging bag from deviating to one side during movement, resulting in heat sealing wrinkles in the tilted state of the packaging bag.

[0035] The first transverse sealing block 33 is provided with a cutting groove, in which a cutting knife 312 is slidably fitted, a cutting cylinder 313 is installed on the first transverse sealing block 33, and the piston rod end of the cutting cylinder 313 is fixedly connected to the cutting knife 312, and an avoidance groove 314 arranged opposite to the cutting knife 312 is provided between the heating blocks 35 on the second transverse sealing block 34. The cutting cylinder 313 drives the cutting to move toward the second transverse sealing block 34, thereby cutting off the heat-sealed packaging bag passing through the heat-sealing gap 36, and when the cutting knife 312 moves toward the second transverse sealing block 34, the cutting knife 312 moves into the avoidance groove 314, thereby cutting off the packaging bag.

[0036] The frame 1 is provided with a unwinding roller 5 for placing the packaging bag film roll; the interior of the collar forming device 2 is a hollow structure, and the packaging bag film on the unwinding roller 5 passes downward from the upper end of the collar forming device 2 to be formed into a cylindrical form with overlapping edges, and a longitudinal sealing mechanism 6 is provided on one side of the collar forming device 2. The longitudinal sealing mechanism 6 heat-seals the longitudinal butt edges of the formed tubular packaging bag film, and a film pulling mechanism 7 is provided below the longitudinal sealing mechanism 6. The film pulling mechanism 7 is used to pull the cylindrical packaging bag downward; the transverse sealing mechanism 3 is arranged below the film pulling mechanism 7.

[0037] The longitudinal sealing mechanism 6 comprises a longitudinal sealing frame 61, on which a first longitudinal sealing block 62 and a second longitudinal sealing block 63 are slidably arranged vertically, and two longitudinal sealing cylinders 64 are installed on the longitudinal sealing frame 61, wherein the piston rod end of one longitudinal sealing cylinder 64 is connected to the first longitudinal sealing block 62, and the piston rod end of the other longitudinal sealing cylinder 64 is connected to the second longitudinal sealing block 63, and the piston rod of the longitudinal sealing cylinder 64 is telescopically driven to drive the first longitudinal sealing block 62 and the second longitudinal sealing block 63 to move away from or approach each other so as to heat-seal the longitudinal joint of the packaging bag film; the film drawing The mechanism 7 includes a film drawing frame 71, on which two sets of driving components are arranged, and the driving components include a first roller 72 and a second roller 73 arranged up and down, and the first roller 72 and the second roller 73 are provided with a film drawing conveyor belt 74 on the outer surface, and the two film drawing conveyor belts 74 of the two sets of driving components are respectively located on both sides of the longitudinal edge sealing of the packaging bag and clamp the longitudinal edge sealing of the packaging bag, and the film drawing frame 71 is installed with a driving motor 75, and the driving motor 75 is connected to the first roller 72 in one set of driving components to drive the first roller 72 to rotate. When film drawing, the driving motor 75 drives the first roller 72 to rotate and drives the film drawing conveyor belt 74 to rotate, and the two sets of film drawing conveyor belts 74 rotate to pull the packaging bag sandwiched between the film drawing conveyor belts 74 downward, and when film drawing stops, the longitudinal sealing cylinder 64 drives the first longitudinal sealing block 62 and the second longitudinal sealing block 63 to approach each other to heat-seal the longitudinal joint of the packaging bag film, and the transverse sealing mechanism 3 performs transverse sealing on the packaging bag and cuts off the completely sealed packaging bag.

[0038] A feeding pipe 8 is provided in the middle of the collar forming device 2, and a feeding hopper 81 is provided at the upper end of the feeding pipe 8. The feeding pipe 8 passes through the inner cavity of the collar forming device 2 and extends above the transverse sealing mechanism 3. The material is introduced into the packaging bag through the feeding pipe 8.

[0039] The parts not involved in this technical solution can be implemented by using existing technologies.

[0040] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected includes the attached claims and their equivalents.

Claims

1. An automatic shaping and sealing device for a vertical packaging machine, comprising a frame (1) and a collar forming device (2) mounted on the frame (1), wherein a transverse sealing mechanism (3) is arranged below the collar forming device (2); characterized in that: The transverse sealing mechanism (3) comprises a transverse sealing frame (31) fixed on the frame (1), a first slide rail (32) fixedly connected to the transverse sealing frame (31), a first transverse sealing block (33) and a second transverse sealing block (34) slidably connected to the first slide rail (32), a heating block (35) fixedly connected to the side surfaces of the first transverse sealing block (33) and the second transverse sealing block (34) on opposite sides, and a heat sealing gap (36) is provided between the heating blocks (35) on the first transverse sealing block (33) and the second transverse sealing block (34) so ​​that the packaging bag passes through the heat sealing gap (36) and is clamped by the heating block (35) for heat sealing; the first transverse sealing block (33) and the second transverse sealing block (34) are both provided with a film supporting mechanism (4), the film supporting mechanism (4) pushes and flattens the packaging bag passing through the first transverse sealing block (33) and the second transverse sealing block (34) to both sides; The film supporting mechanism (4) is symmetrically arranged on the first transverse sealing block (33) and the second transverse sealing block (34), and the film supporting mechanism (4) includes a second slide rail (41) slidably connected to the first transverse sealing block (33) or the second transverse sealing block (34); the first film supporting block (42) and the second film supporting block (43) are slidably connected to the second slide rail (41); the first film supporting block (42) is hingedly connected to a first connecting rod (44); the second film supporting block (43) is hingedly connected to a second connecting rod (45); the first connecting rod (44) and the second connecting rod (45) are hingedly connected at their ends; a third connecting rod (46) is hingedly connected at the hinge between the first connecting rod (44) and the second connecting rod (45); a first compression spring (47) is arranged between the third connecting rod (46) and the first transverse sealing block (33) or the second transverse sealing block (34); The side walls of the first film support block (42) and the second film support block (43) extend to a space between the heating block (35) and the heat sealing gap (36).

2. The automatic shaping and sealing device of a vertical packaging machine according to claim 1, characterized in that: Both ends of the second slide rail (41) are fixedly connected with guide rods (48), and the guide rods (48) are inserted into the first transverse sealing block (33) or the second transverse sealing block (34) and are slidably matched with the first transverse sealing block (33) or the second transverse sealing block (34).

3. The automatic shaping and sealing device of a vertical packaging machine according to claim 1, characterized in that: The first transverse sealing block (33) and the second transverse sealing block (34) are provided with a receiving groove (37), the first compression spring (47) is located in the receiving groove (37), the end of the third connecting rod (46) is inserted into the receiving groove (37) and slidably cooperates with the receiving groove (37), and the first compression spring (47) abuts against the end of the third connecting rod (46).

4. The automatic shaping and sealing device of a vertical packaging machine according to claim 1, characterized in that: The transverse sealing frame (31) is rotatably connected to a first gear (38); the first transverse sealing block (33) is fixedly connected to a first rack (39); the second transverse sealing block (34) is fixedly connected to a second rack (310); the first rack (39) and the second rack (310) are respectively located on both sides of the first gear (38) and are meshed with the first gear (38) to form a gear-rack transmission; a transverse sealing cylinder (311) is provided on one side of the first transverse sealing block (33); a piston rod end of the transverse sealing cylinder (311) is fixedly connected to the first transverse sealing block (33); and a cylinder body end of the transverse sealing cylinder (311) is fixedly connected to the second transverse sealing block (34).

5. The automatic shaping and sealing device of a vertical packaging machine according to claim 1, characterized in that: The first transverse sealing block (33) is provided with a cutting groove, in which a cutting knife (312) is slidably fitted, a cutting cylinder (313) is installed on the first transverse sealing block (33), a piston rod end of the cutting cylinder (313) is fixedly connected to the cutting knife (312), and an avoidance groove (314) arranged opposite to the cutting knife (312) is provided between the heating blocks (35) on the second transverse sealing block (34).

6. The automatic shaping and sealing device of a vertical packaging machine according to any one of claims 1 to 5, characterized in that: The frame (1) is provided with a reel (5) for placing a roll of packaging bag film; the interior of the collar forming device (2) is a hollow structure, and the packaging bag film on the reel (5) passes downward from the upper end of the collar forming device (2) to be formed into a cylindrical form with overlapping edges; a longitudinal sealing mechanism (6) is provided on one side of the collar forming device (2), and the longitudinal sealing mechanism (6) heat-seals the longitudinal butt edges of the formed cylindrical packaging bag film; a film-drawing mechanism (7) is provided below the longitudinal sealing mechanism (6), and the film-drawing mechanism (7) is used to pull and move the cylindrical packaging bag downward; the transverse sealing mechanism (3) is provided below the film-drawing mechanism (7).

7. The automatic shaping and sealing device of a vertical packaging machine according to claim 6, characterized in that: The longitudinal sealing mechanism (6) comprises a longitudinal sealing frame (61), on which a first longitudinal sealing block (62) and a second longitudinal sealing block (63) are slidably arranged vertically, and two longitudinal sealing cylinders (64) are installed on the longitudinal sealing frame (61), wherein the piston rod end of one longitudinal sealing cylinder (64) is connected to the first longitudinal sealing block (62), and the piston rod end of the other longitudinal sealing cylinder (64) is connected to the second longitudinal sealing block (63), and the piston rod of the longitudinal sealing cylinder (64) is telescopically driven to drive the first longitudinal sealing block (62) and the second longitudinal sealing block (63) to move away from or approach each other so as to heat-seal the longitudinal joint of the packaging bag film; the film drawing The mechanism (7) comprises a film-drawing frame (71), on which two groups of driving components are arranged, and the driving components comprise a first roller (72) and a second roller (73) arranged up and down, and the first roller (72) and the second roller (73) are provided with a film-drawing conveyor belt (74) on their outer sleeves, and the two film-drawing conveyor belts (74) of the two groups of driving components are respectively located on both sides of the longitudinal edge sealing of the packaging bag and clamp the longitudinal edge sealing of the packaging bag, and a driving motor (75) is installed on the film-drawing frame (71), and the driving motor (75) is connected to the first roller (72) in one group of driving components to drive the first roller (72) to rotate.

8. The automatic shaping and sealing device of a vertical packaging machine according to claim 7, characterized in that: A feeding pipe (8) is arranged in the middle of the collar forming device (2), and a feeding hopper (81) is arranged at the upper end of the feeding pipe (8). The feeding pipe (8) passes through the inner cavity of the collar forming device (2) and extends to the top of the transverse sealing mechanism (3).

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