Forming device and packaging machine containing the same

Abstract

The present invention relates to the technical field of packaging machines, and in particular to a forming device and a packaging machine containing the forming device. The forming device is arranged on the packaging machine, and the forming device includes: a negative pressure pipeline, a bunching mechanism and a swinging mechanism; one end of the bunching mechanism is provided with a groove assembly for fixing and maintaining the sealing film in an arc-shaped structure, and the other end is rotatably connected to the swinging mechanism; the swinging mechanism is used to drive the bunching mechanism to swing back and forth. The forming device and the packaging machine containing the forming device of the present invention are easy to install, simple to debug, simple in process, easy to process, and improve productivity. PVDC film is used for the outer packaging of the products, which is convenient for packaging and processing and reduces environmental pollution. The pre-forming material is changed from traditional aluminum wire to PVDC sealing film, which reduces the force on the forming mold during the forming process, reduces the wear of the forming mold, and increases the service life of the forming mold.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machines, in particular to a forming device and a packaging machine containing the forming device. Background Art

[0002] The molding mechanism of existing automatic vertical filling and packaging machines consists of multiple parts, resulting in complex processing and tedious installation. The existing sealing molding mechanism uses aluminum wire to seal the product. The preformed material is aluminum wire. During the forming process, the molding die is subjected to high impact forces, resulting in sliding friction between the molding die and the aluminum wire. This shortens the mold lifespan, and each molding die is used to form only one aluminum buckle. This requires long mold replacement and debugging times, reducing production efficiency and increasing production costs. Because the molding material is aluminum, the product cannot pass metal detectors, posing a risk to children during consumption. Summary of the Invention

[0003] A first object of the present invention is to provide a forming device that can solve the problem that the aluminum wire buckle forming device method can pass the metal detector detection and poses a risk to children during consumption. The device uses a sealing film made of PVDC (PVDC is a plastic) (the sealing film is a small piece of PVDC material) instead of the aluminum wire buckle forming device for ligation and sealing.

[0004] The second purpose of the present invention is to provide a packaging machine system, which aims to solve the problems of existing aluminum buckles, such as long replacement and debugging time when replacing the forming mold, reduced production efficiency, sliding friction between the forming mold and the aluminum wire, and short life of the forming mold.

[0005] The present invention provides a forming device, comprising: a negative pressure pipeline, a bundling mechanism and a swinging mechanism; the bundling mechanism, one end of which is provided with a groove assembly for fixing and maintaining the sealing film in an arc-shaped structure, and the other end is rotatably connected to the swinging mechanism; the swinging mechanism is used to drive the bundling mechanism to swing back and forth.

[0006] Among them, the bundling mechanism includes: a forming mold, double-sided positioning grooves of the upper bundling plate and double-sided positioning grooves of the lower bundling plate; a forming mold is arranged between the double-sided positioning grooves of the upper bundling plate and the double-sided positioning grooves of the lower bundling plate; a guide groove on the forming mold, and a groove assembly is arranged at the end of the forming mold; the open end of the guide groove faces the groove assembly.

[0007] Among them, two connecting parts are provided at the end of the forming mold; a groove assembly is provided at the end of the connecting part away from the forming mold; an air duct is provided inside the connecting part; the air duct extends into the forming mold connected to the connecting part, and is connected to the negative pressure pipeline through the forming mold.

[0008] Wherein, the groove assembly includes a U-shaped groove and a vacuum air hole; the U-shaped groove is arranged at the end of the connecting piece; the bottom of the U-shaped groove is provided with a vacuum air hole; the vacuum air hole is connected to the airway.

[0009] Among them, cluster plate blades are provided on the bilateral positioning grooves of the upper cluster plate and the bilateral positioning grooves of the lower cluster plate; one end of the cluster plate blade is open, and the opening direction of the open end of the cluster plate blade is consistent with the opening direction of the U-shaped groove; the open end of the cluster plate blade partially extends to the outside of the U-shaped groove, and the closed part of the open end of the cluster plate blade is at least on the same plane as the bottom surface of the U-shaped groove.

[0010] Among them, the swing mechanism includes: a first bracket, a second bracket and a rotating assembly; the first bracket and the second bracket are connected through the rotating assembly; the first bracket is also fixedly connected to the forming mold; the middle part of the second bracket is fixedly connected to the rotating shaft of the forming device, and the end of the second bracket away from the rotating assembly is connected to the joint bearing.

[0011] In which, the rotating assembly includes: a first seat, a second seat, a first bearing, a second bearing, an elastic retaining ring, a first connecting rod, a second connecting rod and a third connecting rod; the first seat and the second seat are connected by a third connecting rod; the first seat and the second seat are respectively provided with a first bearing and a second bearing; elastic retaining rings are respectively provided at both ends of the first bearing and the second bearing; the first bearing and the second bearing are both provided with a first connecting rod and a second connecting rod that pass through the first bearing and the second bearing and are rotatably connected to the first bearing and the second bearing; one end of the first connecting rod is fixedly connected to the first bracket; the second connecting rod is fixedly connected to the second bracket.

[0012] The third connecting rod is connected to the first seat and the second seat via threads; and a rotating protrusion for rotating the third connecting rod is provided on the third connecting rod.

[0013] There are two clustering mechanisms, namely a left clustering mechanism and a right clustering mechanism; the left clustering mechanism and the right clustering mechanism are arranged opposite to each other; and the left clustering mechanism and the right clustering mechanism have the same structure.

[0014] A packaging machine, the forming device is arranged on the packaging machine.

[0015] The present invention provides a forming device and packaging machine incorporating the same, which has the following beneficial effects: A groove assembly is provided on the forming die of the clustering mechanism, which secures and maintains the shape of the sealing film, replacing the existing aluminum wire buckle. During subsequent sealing by the sealing mechanism, the swing mechanism drives the clustering mechanism, causing it to reciprocate. Using PVDC sealing film instead of the aluminum wire buckle forming device for ligation and sealing reduces commissioning time and improves safety.

[0016] The present invention's forming device and packaging machine incorporating the same also offer the following benefits: easy installation and commissioning, simplified processing, simplified processing, and improved productivity. PVDC film is used for product packaging, facilitating easy handling and minimizing environmental pollution. The preform material, instead of traditional aluminum wire, is replaced with PVDC sealing film, reducing stress on the forming die during the forming process, minimizing die wear, and increasing die life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is an overall schematic diagram of a molding device of the present invention;

[0019] Figure 2 for Figure 1 Stereoscopic image of

[0020] Figure 3 for Figure 1 AA section view in;

[0021] Figure 4 A schematic diagram of a forming mold mechanism of a forming device of the present invention;

[0022] Figure 5 for Figure 4 Stereoscopic image of

[0023] Figure 6 for Figure 4 a cross-sectional view of the forming die;

[0024] Figure 7 A three-dimensional diagram of a reciprocating box of a packaging machine according to the present invention;

[0025] Figure 8 for Figure 7 Schematic diagram from another angle.

[0026] Description of reference numerals:

[0027] 1. Clustering mechanism; 11. Forming die; 111. Connector; 112. Air duct; 113. Clustering plate blades; 1131. Closure of the clustering plate blade opening; 1132. Y-shaped opening; 12. Upper clustering plate bilateral positioning grooves; 13. Lower clustering plate bilateral positioning grooves; 14. Guide groove; 15. Left clustering mechanism; 16. Right clustering mechanism;

[0028] 2. Slot assembly; 21. U-shaped slot; 22. Vacuum air hole;

[0029] 3. Swing mechanism; 31. First bracket; 32. Second bracket;

[0030] 33. Rotating assembly; 331. First seat; 332. Second seat; 333. First bearing; 334. Second bearing; 335. Circlip; 336. First connecting rod; 337. Second connecting rod; 338. Third connecting rod; 339. Bushing;

[0031] 34. Rotating shaft of forming device; 35. Spherical bearing;

[0032] 4. Packaging machine; 41. Front sealing mechanism; 42. Rear sealing mechanism; 43. PVDC sealing film forming device; 44. Cutter mechanism; 45. Upper bottom plate of the packaging machine reciprocating box. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] See Figures 1-8 A forming device includes a negative pressure pipeline, a bundling mechanism 1 and a swinging mechanism 3; the bundling mechanism 1, one end of which is provided with a groove assembly 2 for fixing and maintaining the sealing film in an arc-shaped structure, and the other end is rotatably connected to the swinging mechanism 3; the swinging mechanism 3 is used to drive the bundling mechanism 1 to swing back and forth.

[0037] The clustering mechanism 1 is provided on the packaging machine 4 and slides reciprocatingly.

[0038] The swing mechanism 3 provides the power for the clustering mechanism 1 to slide along the slide rail. The swing mechanism 3 is provided with a slider, and the packaging machine 4 is provided with a slide rail, and the slider cooperates with the slide rail.

[0039] A slot assembly 2 is provided at one end of the bundling mechanism 1 , and the slot assembly 2 can shape and fix the sealing film so that the sealing film is attached to the slot assembly 2 in a U shape.

[0040] Specifically, the clustering mechanism 1 includes: a forming mold 11, a bilateral positioning groove 12 of an upper clustering plate and a bilateral positioning groove 13 of a lower clustering plate; a forming mold 11 is provided between the bilateral positioning groove 12 of the upper clustering plate and the bilateral positioning groove 13 of the lower clustering plate; a guide groove 14 is provided on the forming mold 11, and a groove assembly 2 is provided at the end of the forming mold 11; the open end of the guide groove 14 faces the groove assembly 2.

[0041] The upper cluster plate bilateral positioning grooves 12 and the lower cluster plate bilateral positioning grooves 13 are relatively provided on both sides of the forming mold 11, and are an integrated structure with the forming mold 11. The cluster plate blades 113 can be conveniently fixed on the forming mold 11 through the upper cluster plate bilateral positioning grooves 12 and the lower cluster plate bilateral positioning grooves 13. In addition, fixing holes are provided on the upper cluster plate bilateral positioning grooves 12 and the lower cluster plate bilateral positioning grooves 13 to facilitate fixing the forming mold 11 on the bracket, so that the forming mold 11 can move back and forth with the bracket.

[0042] Specifically, two connecting parts 111 are provided at the end of the forming mold 11; a groove assembly 2 is provided at the end of the connecting part 111 away from the forming mold 11; an air duct 112 is provided inside the connecting part 111; the air duct 112 extends into the forming mold 11 connected to the connecting part 111, and is connected to the negative pressure pipeline through the forming mold 11.

[0043] The connecting piece 111 and the forming mold 11 are an integrated structure. The connecting piece 111 is provided with an air duct 112 (a channel for air supply) inside. The air duct 112 is connected to a negative pressure pipeline through the forming mold 11. The negative pressure pipeline is connected to a conventional device that can generate negative pressure gas. Through this device, negative pressure is generated in the forming mold 11 and the air duct 112 inside the connecting piece 111.

[0044] Specifically, the groove assembly 2 includes a U-shaped groove 21 and a vacuum air hole 22; the U-shaped groove 21 is arranged at the end of the connecting piece 111; the vacuum air hole 22 is provided at the bottom of the U-shaped groove 21; the vacuum air hole 22 is connected to the airway 112.

[0045] A vacuum air hole 22 is provided at the bottom of the U-shaped groove 21, that is, a vacuum air hole 22 is provided at the U-shaped bottom of the U-shaped groove 21; the vacuum air hole 22 is connected with the airway 112, and a negative pressure is formed at the vacuum air hole 22, which can adsorb the sealing film in the U-shaped groove 21, and enable the sealing film to change into a U-shape along with the shape of the U-shaped groove 21, so as to facilitate sealing the product.

[0046] This structure replaces the original aluminum wire buckle forming device.

[0047] Specifically, the upper clustering plate bilateral positioning groove 12 and the lower clustering plate bilateral positioning groove 13 are both provided with clustering plate blades 113; one end of the clustering plate blade 113 is open, and the opening direction of the open end of the clustering plate blade 113 is consistent with the opening direction of the U-shaped groove 21; the open end portion of the clustering plate blade 113 extends to the outside of the U-shaped groove 21, and the closed end 1131 of the clustering plate blade is at least on the same plane as the bottom surface of the U-shaped groove 21.

[0048] One end of the clustering plate blade 113 is placed in the positioning grooves of the upper clustering plate bilateral positioning groove 12 and the lower clustering plate bilateral positioning groove 13, and the other end face of the clustering plate blade 113 is not higher than the positioning groove end faces of the upper clustering plate bilateral positioning groove 12 and the lower clustering plate bilateral positioning groove 13.

[0049] The above structure ensures that when the forming mold 11 slides back and forth, the side walls of the cluster plate blades 113 do not protrude from the upper cluster plate double-sided positioning grooves 12 and the lower cluster plate double-sided positioning grooves 13, thereby facilitating sliding.

[0050] One end of the clustering plate blade 113 is open, and the open end can facilitate the entry of the empty part of the intestine, so that the empty part of the intestine can easily enter along the open end and be conveniently cut off.

[0051] Due to the above requirements, the open end of one end of the clustering plate blade 113 is closed. For example, the open end of the clustering plate blade 113 is Y-shaped, and the Y-shaped bottom of the opening end 1132 is on the same plane as the bottom of the U-shaped groove 21. When the squeezed part of the intestine enters from the Y-shaped opening end 1132 to the Y-shaped bottom, the sealing film is just placed on the bottom of the U-shaped groove 21.

[0052] Specifically, the swing mechanism 3 includes: a first bracket 31, a second bracket 32 and a rotating assembly 33; the first bracket 31 and the second bracket 32 are connected through the rotating assembly 33; the first bracket 31 is also fixedly connected to the forming mold 11; the middle part of the second bracket 32 is fixedly connected to the rotating shaft 34 of the forming device, and the end of the second bracket 32 away from the rotating assembly 33 is connected to the joint bearing 35.

[0053] The first bracket 31 is fixedly connected to the forming mold 11. The function of the first bracket 31 is that the first bracket 31 can be easily replaced and the connection method can be easily changed, which plays the role of steering, extending, and facilitating replacement, thereby improving the service life of the forming mold 11. The first bracket 31 makes the use of the forming mold 11 more flexible.

[0054] In this embodiment, the bent first bracket 31 can realize the reciprocating motion of the forming die 11 while saving the space occupied by the entire packaging machine 4, making the entire packaging machine 4 more compact.

[0055] The second bracket 32 is fixedly connected to the forming device rotating shaft 34 of the packaging machine 4. When the forming device rotating shaft 34 rotates, it drives the second bracket 32 to rotate, and the rotating assembly 33 connected to the second bracket 32 rotates accordingly, and the first bracket 31 connected to the rotating assembly 33 also rotates accordingly. The rotation of the forming device rotating shaft 34 is transmitted through the second bracket 32, thereby becoming the driving force for the reciprocating motion of the forming mold 11.

[0056] The forming device rotating shaft 34 is provided on the packaging machine 4 . When the packaging machine 4 is in operation, the forming device rotating shaft 34 is controlled to rotate.

[0057] The function of the spherical bearing 35 is to synchronize with the clustering mechanism 16 provided on the other end of the packaging machine 4 .

[0058] The spherical bearing 35 is a conventional connection component and belongs to the prior art.

[0059] Specifically, the rotating assembly 33 includes: a first seat 331, a second seat 332, a first bearing 333, a second bearing 334, an elastic retaining ring 335, a first connecting rod 336, a second connecting rod 337 and a third connecting rod 338; the first seat 331 and the second seat 332 are connected by the third connecting rod 338; the first seat 331 and the second seat 332 are respectively provided with a first bearing 333 and a second bearing 334; elastic retaining rings 335 are respectively provided at both ends of the first bearing 333 and the second bearing 334; the first bearing 333 and the second bearing 334 are both provided with a first connecting rod 336 and a second connecting rod 337 that pass through the first bearing 333 and the second bearing 334 and are rotatably connected to the first bearing 333 and the second bearing 334; one end of the first connecting rod 336 is fixedly connected to the first bracket 31; the second connecting rod 337 is fixedly connected to the second bracket 32.

[0060] The first connecting rod 336 and the second connecting rod 337 are both pins.

[0061] The third connecting rod 338 is a screw rod, and the rotating protrusion provided on the screw rod is a nut fixed on the screw rod, which facilitates the rotation of the screw rod through the nut.

[0062] The second seat 332 and the third connecting rod 338 are screwed together between the first seat 331. By adjusting the third connecting rod 338, the distance between the first seat 331 and the second seat 332 can be changed, thereby changing the distance the forming mold 11 moves and adjusting the relative positions of the forming device and the sealing mechanism. This allows the forming mold 11 to adapt to a wider range of sealing films and casing films.

[0063] The elastic circlip 335 is a hole-use elastic circlip 335 , which plays a role in positioning the first bearing 333 and the second bearing 334 .

[0064] The first connecting rod 336 and the second connecting rod 337 pass through the circlip 335 .

[0065] The bearing changes sliding friction into rolling friction, which reduces friction loss. At the same time, the bearing can withstand a certain radial load and is not easily damaged.

[0066] Specifically, the third connecting rod 338 is connected to the first seat 331 and the second seat 332 via threads; the third connecting rod 338 is provided with a rotating protrusion for rotating the third connecting rod 338 .

[0067] Specifically, there are two clustering mechanisms 1, namely a left clustering mechanism 15 and a right clustering mechanism 16; the left clustering mechanism 15 and the right clustering mechanism 16 are arranged opposite to each other; and the left clustering mechanism 15 and the right clustering mechanism 16 have the same structure.

[0068] The left-side bundling mechanism 15 and the right-side bundling mechanism 16 have the same structure.

[0069] The packaging machine 4 is provided with two bundling mechanisms 1 , namely a left bundling mechanism 15 and a right bundling mechanism 16 .

[0070] A packaging machine 4, the above-mentioned forming device is arranged on the packaging machine 4.

[0071] Working principle:

[0072] The material of the forming mold 11 is LY14 (hard aluminum), but is not limited to this brand of material.

[0073] The left cluster plate blade 113 is fixed in the upper cluster plate bilateral positioning groove 12 and the lower cluster plate bilateral positioning groove 13 of the forming mold 11. The forming mold 11 is fixed on the first bracket 31. The first seat 331 is equipped with a first bearing 333. There are two first bearings 333. The two first bearings 333 are separated by a shaft sleeve 339. The two ends of the first bearing 333 are positioned with elastic retaining rings 335 using holes. The pin connects the first bracket 31 and the first seat 331. The first bracket 31 and the first seat 331 can rotate freely on the pin. One end of the screw is fixed to the first seat 331, and the other end is fixed to the second seat 332. The second seat 332 is equipped with a second bearing 334. There are two second bearings 334. The two second bearings 334 are arranged with a sleeve 339 between them. The two ends of the second bearing 334 are positioned with elastic retaining rings 335 using holes. The pin connects the second seat 332 to the second bracket 32. The second seat 332 and the second bracket 32 can rotate freely on the pin. The middle part of the second bracket 32 is fixed to the rotating shaft 34 of the forming device. The second bracket 32 cannot rotate relative to the rotating shaft 34 of the forming device. The other end is connected to the joint bearing 35 with a pin. The joint bearing 35 is used to drive the right-side clustering mechanism 16 and the left-side clustering mechanism 15 to operate synchronously.

[0074] When the equipment is operating normally, the conventional drive mechanism on the packaging machine 4 drives the cam (a conventional structure on existing packaging machines 4) to rotate. The cam follower drives the forming device rotating shaft 34 to rotate repeatedly clockwise and counterclockwise. The second bracket 32 and the forming device rotating shaft 34 (the forming device rotating shaft 34 is the shaft that drives the forming device to reciprocate) rotate synchronously clockwise and counterclockwise. The screw and the first and second seats 331 and 332 convert this rotational motion into reciprocating linear motion of the first bracket 31. A slider is provided on the side of the first bracket 31 near the upper bottom plate 45 of the packaging machine reciprocating box. The slider cooperates with the slide rail on the upper bottom plate 45 of the packaging machine reciprocating box, and the slider performs linear reciprocating motion on the slide rail. The screw is used to adjust the relative positions of the forming device and the front and rear sealing mechanisms 41 and 42. When the equipment is normally bundled, the sealing film forming device 43 presses the cut sealing film into the U-shaped groove of the forming device. The forming device absorbs the sealing film into the outline of the U-shaped groove through the vacuum air holes 22 and the U-shaped groove, so that the sealing film maintains a "U" shape. The left bundling mechanism 15 and the right bundling mechanism 16 move synchronously toward the middle. The bundling plate blades 113 on the forming device bundle the intestines through the squeezed-out part, and at the same time press the sealing film absorbed in the U-shaped groove of the forming device against the outside of the bundled intestines. The front side sealing device and the rear side sealing device perform sealing, and the cutter mechanism 44 divides the sealed product. The first bearing 333 and / or the second bearing 334 can be replaced with a copper sleeve or a steel sleeve. According to the use environment and processing requirements, they can be appropriately adjusted. Compared with copper sleeves and steel sleeves, the bearings change sliding friction to rolling friction, which reduces friction loss. At the same time, the bearings can withstand a certain radial load and are not easily damaged.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A molding device comprising: Negative pressure pipeline; characterized in that it also includes: A clustering mechanism (1), wherein one end of the clustering mechanism (1) is provided with a groove assembly (2) for fixing and maintaining the sealing membrane in an arc-shaped structure, and the other end is rotatably connected to the swing mechanism (3); A swing mechanism (3), the swing mechanism (3) is used to drive the clustering mechanism (1) to swing back and forth; The clustering mechanism (1) comprises: a forming die (11), an upper clustering plate bilateral positioning groove (12), and a lower clustering plate bilateral positioning groove (13); a forming die (11) is provided between the upper clustering plate bilateral positioning groove (12) and the lower clustering plate bilateral positioning groove (13); a guide groove (14) is provided on the forming die (11), and a groove assembly (2) is provided at an end of the forming die (11); an open end of the guide groove (14) faces the groove assembly (2); The swing mechanism (3) comprises: a first bracket (31), a second bracket (32) and a rotating assembly (33); the first bracket (31) and the second bracket (32) are connected via the rotating assembly (33); the first bracket (31) is also fixedly connected to the forming mold (11); the middle portion of the second bracket (32) is fixedly connected to the rotating shaft (34) of the forming device, and the end of the second bracket (32) away from the rotating assembly (33) is connected to the joint bearing (35); The rotating assembly (33) includes: a first seat (331), a second seat (332), a first bearing (333), a second bearing (334), an elastic retaining ring (335), a first connecting rod (336), a second connecting rod (337) and a third connecting rod (338); the first seat (331) and the second seat (332) are connected by the third connecting rod (338); the first seat (331) and the second seat (332) are respectively provided with a first bearing (333) and a second bearing (334); the first seat (331) and the second seat (332) are respectively provided with a first bearing (333) and a second bearing (334); the first seat (331) and the second seat (332) are respectively provided with a first bearing (333) and a second bearing (334); the first seat (331) and the second seat (332) are respectively provided with a first bearing (333) and a second bearing (334). Elastic retaining rings (335) are respectively provided at both ends of a first bearing (333) and a second bearing (334); a first connecting rod (336) and a second connecting rod (337) are both provided on the first bearing (333) and the second bearing (334), which pass through the first bearing (333) and the second bearing (334) and are rotatably connected to the first bearing (333) and the second bearing (334); one end of the first connecting rod (336) is fixedly connected to the first bracket (31); and the second connecting rod (337) is fixedly connected to the second bracket (32); Two connecting pieces (111) are provided at the ends of the forming mold (11); a groove assembly (2) is provided at one end of the connecting piece (111) away from the forming mold (11); an air passage (112) is provided inside the connecting piece (111); the air passage (112) extends into the forming mold (11) connected to the connecting piece (111), and is connected to a negative pressure pipeline through the forming mold (11).

2. A molding device according to claim 1, characterized in that: The groove assembly (2) comprises a U-shaped groove (21) and a vacuum air hole (22); the U-shaped groove (21) is provided at the end of the connecting piece (111); the bottom of the U-shaped groove (21) is provided with a vacuum air hole (22); the vacuum air hole (22) is communicated with the air channel (112).

3. A molding device according to claim 2, characterized in that: The upper cluster plate bilateral positioning groove (12) and the lower cluster plate bilateral positioning groove (13) are both provided with cluster plate blades (113); one end of the cluster plate blade (113) is open, and the opening direction of the open end of the cluster plate blade (113) is consistent with the opening direction of the U-shaped groove (21); the open end portion of the cluster plate blade (113) extends to the outside of the U-shaped groove (21), and the closed portion (1131) of the open end of the cluster plate blade is at least on the same plane as the groove bottom surface of the U-shaped groove (21).

4. A molding device according to claim 1, characterized in that: The third connecting rod (338) is connected to the first seat (331) and the second seat (332) via threads; the third connecting rod (338) is provided with a rotating protrusion for rotating the third connecting rod (338).

5. A molding device according to claim 1, characterized in that: The number of the clustering mechanisms (1) is two, namely a left clustering mechanism (15) and a right clustering mechanism (16); the left clustering mechanism (15) and the right clustering mechanism (16) are arranged opposite to each other; and the left clustering mechanism (15) and the right clustering mechanism (16) have the same structure.

6. A packaging machine (4), characterized in that It comprises a forming device according to any one of claims 1 to 5, wherein the forming device is arranged on a packaging machine (4).

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