Pre-heating and sealing mechanism of mesh bag machine

Abstract

The utility model provides a mesh bag machine pre-heating sealing mechanism which comprises a mold arranged in the middle and sealing tools arranged on the two sides of the mold and further comprises a driving module, the driving module comprises a driving assembly and two swing connecting assemblies, the two swing connecting assemblies are arranged on the two sides of the mold, and the driving assembly is connected with the swing connecting assemblies. The sealing tool is installed on the side, facing the mold, of the swing connecting assembly, so that the sealing tool can swing relative to the driving assembly to eliminate the parallelism error between the sealing tool and the mold. The driving module is connected with the sealing tool through the swing connecting assembly, so that the driving assembly and the sealing tool can swing relatively, when the driving assembly drives the sealing tool to be close to the heat sealing plane of the mold, the sealing tool can swing to be attached to the heat sealing surface of the mold, and the parallelism error of the sealing tool and the mold is eliminated; the barrel type net film and the sheet type composite film can be attached to each heat sealing position, the attaching quality is guaranteed, and the situation that local virtual heat sealing or heat sealing is not conducted together is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic packaging equipment, in particular to a preheating and sealing mechanism for a mesh bag machine. Background Art

[0002] Traditional packaging bags are generally composite film bags, and the bag body of the composite film bag has a certain hardness. The bag body is opened before unloading to fill the material. However, for oranges, lemons, potatoes and other fruit and vegetable materials, the composite film is used for packaging, and the ventilation effect is not ideal; therefore, there are cylindrical mesh bags for packaging fruits and vegetables on the market. The bag body of the cylindrical mesh bag includes a cylindrical mesh film and a sheet composite film. The cylindrical mesh film is used to place fruits and vegetables, and the sheet composite film is attached to a part of the outer area of ​​the mesh film. In order to improve the packaging efficiency, some mesh bag machines have a preheating and sealing mechanism that automatically attaches the sheet composite film to the cylindrical mesh film. However, the preheating and sealing mechanism of the existing mesh bag machine has a mold in the middle, and a sealer is arranged on both sides of the mold. The sealer is driven by a driving member, but the existing sealer is usually rigidly connected to the driving member. If it is skewed during long-term use, it cannot be automatically leveled, for example, one side is closer to the mold and the other side is farther away from the mold; this is likely to cause the sheet composite film to not fit the cylindrical mesh film at some positions, affecting the quality of the mesh bag. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a preheating and sealing mechanism for a mesh bag machine.

[0004] The utility model is implemented by the following method: a preheat sealing mechanism of a net bag machine, comprising a mold arranged in the middle and sealers arranged on both sides of the mold, and also comprising a driving module, wherein the driving module comprises a driving component and a swing connection component, two of the swing connection components are arranged on both sides of the mold, the driving component is connected to the swing connection components, and is used to drive the two swing connection components to approach or move away from the mold, and the sealer is installed on the side of the swing connection component facing the mold, so that the sealer can swing relative to the driving component to eliminate the parallelism error with the mold.

[0005] Preferably, the swing connection assembly includes a moving block and a swing block capable of rotating relative to the moving block, the swing block is movably connected to the moving block, the seal is installed on the swing block, the moving block is connected to the drive assembly, and the drive assembly is used to drive the moving block to approach or move away from the mold.

[0006] Preferably, two moving blocks are provided on each side of the mold, which are respectively arranged at the top and the bottom, and the upper and lower ends of the swing block are respectively rotatably connected to the corresponding moving blocks.

[0007] Preferably, two seals are provided on each side of the mold, the swing block is connected to a connecting block on both sides of the horizontal extension direction of the mold heat sealing plane, the two seals are connected to one connecting block respectively, and the seal is located between the connecting block and the mold.

[0008] Preferably, a first elastic member is provided between the bottom of the seal and the bottom of the connecting block, so as to enable the seal to swing in the up-and-down directions, thereby eliminating the parallelism error of the seal in the up-and-down directions.

[0009] Preferably, a second elastic member is provided on the side of the swing block facing the heat sealing plane of the mold for connecting to a baffle; the baffle is hollowed out, and a convex portion is provided at a position of the seal relative to the baffle, and the baffle is used to prevent the mesh bag from sticking to the seal after heat sealing is completed.

[0010] Preferably, a limit block is provided on each side of one of the movable blocks on each side of the mold on both sides in a vertical direction to the heat-sealing surface of the mold, and one of the connecting blocks is located between the two limit blocks to limit the swing angle of the swing block.

[0011] Preferably, the swing block is provided with a bidirectional screw rod which can rotate and is transversely parallel to the heat sealing plane of the mold. A guide rod is also passed through the swing block. The connecting block is also passed through the bidirectional screw rod and the guide rod. The bidirectional screw rod is rotated to adjust the distance between the two connecting blocks.

[0012] Preferably, the driving assembly includes a telescopic cylinder, a guide member and a displacement plate, the guide member is fixedly mounted on the periphery of the mold; the two displacement plates are passed through the guide member and are respectively located on both sides of the mold, the extended end of the telescopic cylinder is hinged with a connecting rod assembly, the connecting rod assembly is movably connected to the displacement plate, the guiding direction of the guide member is perpendicular to the fitting surface of the mold; the moving block is fixedly connected to the displacement plate.

[0013] Preferably, the connecting rod assembly includes a movable block hinged to the extended end of the telescopic cylinder, and also includes a first connecting rod hinged at the top and the middle of the movable block, and the two first connecting rods are respectively hinged to one of the displacement plates; there are two guide members, and the guide members include a guide shaft and a linear bearing. The two guide shafts are arranged side by side up and down, and the axial direction is perpendicular to the heat sealing plane of the mold. A linear bearing is installed on the upper and lower parts of the displacement plate, and the linear bearings are passed through the corresponding guide shafts. Limiting plates are respectively provided at both ends of the guide shaft to prevent the displacement plate from falling out.

[0014] The beneficial effects of the utility model are as follows: the utility model provides a preheat sealing mechanism for a net bag machine. Compared with the prior art, the utility model has at least the following technical effects: 1. By connecting the sealer through a swing connection assembly in the driving module, the driving assembly and the sealer can swing relative to each other, so that when the driving assembly drives the sealer to approach the heat sealing plane of the mold, the sealer can swing to make it fit with the heat sealing surface of the mold, eliminating the parallelism error between the sealer and the mold, so that the cylindrical net film and the sheet composite film can ensure the fit at each heat sealing location, ensuring the fit quality and avoiding the occurrence of local false heat sealing or failure to heat seal together. 2. The swing connection assembly includes a swing block and a moving block, the moving block is connected to the driving assembly, and the sealer is connected to the swing block. Since the swing block and the moving block are hinged, the swing block can rotate relative to the moving block, and then the sealer connected to it can be rotated, that is, when the sealer contacts the surface of the sealer during heat sealing, it can deflect to eliminate the parallelism error with the mold, so that the sealer and the mold fit more closely during heat sealing, and then the heat seal is more firm. 3. Two connecting blocks are symmetrically arranged on both sides of the swing block. The connecting block is connected to the seal by a first elastic member. The swing block is rotatably connected to the upper and lower moving blocks, so that the swing block can swing left and right relative to the moving block, and the connecting block is connected to the bottom of the seal by a spring, so that the seal can swing slightly up and down relative to the connecting block. The combination of the two can eliminate the parallelism error between the seal and the mold in the up and down directions and the parallelism error in the left and right directions, making the heat sealing more tight and firm. 4. The driving assembly consists of a telescopic cylinder, a guide, a displacement plate and a connecting rod assembly. The movable block of the connecting rod assembly and the first connecting rod connect the displacement plates on both sides. The telescopic cylinder pulls down the connecting block and rotates counterclockwise, thereby pushing the two displacement plates away from each other along the guide; on the contrary, the two displacement plates approach each other, that is, push the two seals to approach each other and fit the mold to heat seal the cylindrical mesh film and the sheet composite film. Only one telescopic cylinder is needed to drive the seals on both sides of the mold to approach or move away from each other, reducing the production cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a three-dimensional structural schematic diagram of a preheating and sealing mechanism of a mesh bag machine.

[0016] Figure 2 It is a schematic diagram of the connection relationship between the sealing device and the driving component of the utility model.

[0017] Figure 3 It is a schematic diagram of the connection relationship between the sealing device and the driving component of the utility model from another perspective.

[0018] Figure 4 yes Figure 3 A partial enlarged schematic diagram on the left side of the middle.

[0019] Figure 5It is a top view schematic diagram of the connection relationship between the seal and the drive assembly of the utility model.

[0020] Explanation of the accompanying drawings: 1. Mould; 2. Seal; 3. Drive assembly; 31. Telescopic cylinder; 32. Guide member; 33. Displacement plate; 34. Connecting rod assembly; 341. Movable block; 342. First connecting rod; 35. Limit plate; 4. Swing connecting assembly; 41. Swing block; 42. Moving block; 43. Connecting block; 44. First elastic member; 45. Second elastic member; 46. Baffle; 47. Limit block; 48. Bidirectional screw; 49. Guide rod. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figures 1 to 5 A preheat sealing mechanism for a net bag machine includes a mold 1 arranged in the middle and a sealer 2 arranged on both sides of the mold 1, and also includes a driving module, wherein the driving module includes a driving component 3 and a swing connection component 4, wherein two swing connection components 4 are arranged on both sides of the mold 1, and the driving component 3 is connected to the swing connection component 4 to drive the two swing connection components to approach or move away from the mold 1, and the sealer 2 is installed on the side of the swing connection component 4 facing the mold 1, so that the sealer 2 can swing relative to the driving component 3 to eliminate the parallelism error with the mold 1. By connecting the sealer 2 through the swing connection component 4 in the driving module, the driving component 3 and the sealer 2 can swing relative to each other, so that when the driving component 3 drives the sealer 2 to approach the heat sealing plane of the mold 1, the sealer 2 can swing to make it fit with the heat sealing surface of the mold 1, eliminating the parallelism error between the sealer 2 and the mold 1, so that the cylindrical net film and the sheet composite film can ensure the fit at each heat sealing position, ensuring the fit quality and avoiding the occurrence of partial false heat sealing or failure to heat seal together.

[0023] See also Figures 1 to 5 Preferably, the swing connection assembly 4 includes a moving block 42 and a swing block 41 that can rotate relative to the moving block 42, the swing block 41 is movably connected to the moving block 42, the seal 2 is mounted on the swing block 41, the moving block 42 is connected to the driving assembly 3, and the driving assembly 3 is used to drive the moving block 42 to approach or move away from the mold 1. Since the swing block 41 is hinged to the moving block 42, the swing block 41 can rotate relative to the moving block 42, thereby enabling the seal 2 connected thereto to rotate, that is, when the seal 2 contacts the surface of the seal 2 during heat sealing, it can deflect to eliminate the parallelism error with the mold 1, so that the seal 2 and the mold 1 fit more closely during heat sealing, thereby making the heat sealing more firm.

[0024] See also Figures 1 to 5Preferably, two moving blocks 42 are provided on each side of the mold 1, which are respectively provided at the top and the bottom; the upper and lower ends of the swing block 41 are rotatably connected to the corresponding moving blocks 42. Two sealers 2 are provided on each side of the mold 1, and the swing block 41 is respectively connected to a connecting block 43 on both sides of the horizontal extension direction of the heat sealing plane of the mold 1, and the two sealers 2 are respectively connected to one connecting block 43, and the sealer 2 is located between the connecting block 43 and the mold 1. A first elastic member 44 is provided between the bottom of the sealer 2 and the bottom of the connecting block 43, and the top of the sealer 2 and the top of the connecting block 43 can be fixedly connected (as long as the sealer can have a slight up and down swing, for example, it is connected by bolt locking and there is a certain gap), or it can be a movable connection, for example, it is also connected by an elastic member; so that the sealer 2 can swing up and down to eliminate the parallelism error of the sealer 2 in the up and down direction. Two connecting blocks 43 are symmetrically arranged on both sides of the swing block 41. The connecting blocks 43 are connected to the seal 2 through a first elastic member 44. The swing block 41 is rotatably connected to the moving blocks 42 at the upper and lower ends, so that the swing block 41 can swing left and right relative to the moving block 42, and the connecting block 43 is connected to the top and bottom of the seal 2 through a spring, so that the seal 2 can swing slightly up and down relative to the connecting block 43. The combination of the two can eliminate the parallelism error between the seal 2 and the mold 1 in the up and down directions and the parallelism error in the left and right directions, making the heat seal fit tighter and firmer. It should be noted that the swings in the up and down directions and the left and right directions are all slight swings, and cannot swing in amplitude.

[0025] See also Figures 1 to 5 Preferably, the swing block 41 is provided with a second elastic member 45 on the side facing the heat-sealing plane of the mold 1, which is used to connect a baffle 46; the baffle 46 is hollowed out, and a convex portion is provided at the position of the seal 2 opposite to the baffle 46, and the baffle 46 is used to prevent the net bag from adhering to the seal 2 after the heat sealing is completed. The setting of the baffle 46 can prevent the net bag from adhering to the seal 2 after the heat sealing is completed, that is, after the baffle 46 is pressed, the convex portion of the seal 2 will protrude from the hollow portion of the baffle 46 to contact the net bag, and when retreating, the baffle 46 will be pushed by the second elastic member 45 to move relative to the seal 2 to the side close to the mold 1, that is, the convex portion of the seal 2 will retreat from the hollow portion, and even if the net bag is adhered, it will be separated from the seal 2 due to the obstruction of the baffle 46.

[0026] See also Figures 1 to 5Preferably, one of the moving blocks 42 on each side of the mold 1 is provided with a limit block 47 on both sides of the vertical direction of the heat-sealing surface of the mold 1, and one of the connecting blocks is located between the two limit blocks 47 to limit the swing angle of the swing block 41. Avoid too large a swing angle, which may lead to insufficient pressing force during heat sealing.

[0027] See also Figures 1 to 5 Preferably, the swing block 41 is provided with a bidirectional screw rod 48 which is rotatable and transversely parallel to the heat sealing plane of the mold 1, and a guide rod 49 is also penetrated on the swing block 41. The connecting block 43 is penetrated on both the bidirectional screw rod 48 and the guide rod 49, and the bidirectional screw rod is rotated to adjust the distance between the two connecting blocks 43. The distance between the two seals 2 can be adjusted according to the size of the mesh bag to increase versatility.

[0028] See also Figures 1 to 3 , Figure 5Preferably, the driving assembly 3 includes a telescopic cylinder 31, a guide member 32 and a displacement plate 33, the guide member 32 is fixedly installed on the periphery of the mold 1; the two displacement plates 33 are passed through the guide member 32 and are respectively located on both sides of the mold 1, the extended end of the telescopic cylinder 31 is hinged with a connecting rod assembly 34, the connecting rod assembly 34 is movably connected to the displacement plate 33, and the guiding direction of the guide member 32 is perpendicular to the fitting surface of the mold 1; the moving block 42 is fixedly connected to the displacement plate 33. The connecting rod assembly 34 includes a movable block 341 hinged to the extended end of the telescopic cylinder 31, and also includes a first connecting rod 342 hinged to the top and the middle of the movable block 341, and the two first connecting rods 342 are respectively hinged to a displacement plate 33; there are two guide members 32, and the guide members 32 include a guide shaft and a linear bearing. The two guide shafts are arranged side by side up and down, and the axial direction is perpendicular to the heat sealing plane of the mold 1. A linear bearing is installed on the upper and lower parts of the displacement plate 33, and the linear bearings are passed through the corresponding guide shafts. Limiting plates 35 are respectively provided at both ends of the guide shaft to prevent the displacement plate 33 from falling out. The driving assembly 3 is composed of a telescopic cylinder 31, a guide member 32, a displacement plate 33 and a connecting rod assembly 34. The displacement plates 33 on both sides are connected through the movable block 341 and the first connecting rod 342 of the connecting rod assembly 34. The telescopic cylinder 31 pulls down the connecting block 43 and rotates counterclockwise, thereby pushing the two displacement plates 33 away from each other along the guide member 32; on the contrary, the two displacement plates 33 approach each other, that is, push the two seals 2 to approach each other and fit the mold 1 to heat-seal the cylindrical mesh film and the sheet composite film. Only one telescopic cylinder 31 is needed to drive the seals 2 on both sides of the mold 1 to approach or move away from each other, reducing the production cost of the equipment. It should be noted that the cylinder body of the telescopic cylinder 31 is hinged to the component on which it is installed; the middle of the movable block 341 is hinged to the component on which it is installed, and its hinge point with the telescopic cylinder 31 is at a position deviated from its own rotation axis.

[0029] The utility model has the following working principle:

[0030] When heat sealing is required, the telescopic cylinder 31 is retracted to make the movable block 341 rotate counterclockwise, so that the first connecting rod 342 connected to the movable block 341 is pushed out to both sides to push the displacement plate 33 to move along the guide member 32 in the direction away from the mold 1, so that the sealer 2 is away from the mold 1. After that, the material is fed between the mold 1 and the sealer 2 through the supply mechanism of the cylindrical web film and the sheet composite film. Afterwards, the telescopic cylinder 31 is pushed out to make the movable block 341 rotate clockwise, thereby making the two first connecting rods 342 retract inward, so as to drive the displacement plate 33 to move along the guide member 32 in the direction close to the mold 1, so that the seal 2 is close to the mold 1. At this time, the baffle 46 first presses the cylindrical mesh and the sheet composite film, and then the displacement plate 33 moves to drive the movable block 42 to continue to approach the mold 1. The convex part of the seal 2 passes through the hollow part of the baffle 46 and contacts with the cylindrical mesh and the sheet composite film for heat sealing, and the cylindrical mesh and the sheet composite film are pressed tightly on the mold 1 for heat sealing (at this time, if the seal 2 is skewed In this case, under the action of the swing block 41 that can rotate relative to the movable block 42, when it contacts the mold 1, it is subjected to the reverse force of the mold 1, and the seal 2 closer to the mold 1 is pushed outward, while the side away from the mold 1 is pushed inward, thereby achieving the parallelism between the mold 1 and the seal 2, thereby eliminating the parallelism error in the left and right directions; and the connecting block 43 connecting the seal 2 and the swing block 41 is connected by the first elastic member 44 arranged at the upper and lower parts, referring to the same principle of the swing block 41, which can eliminate the parallelism error in the upper and lower directions, thereby achieving the effect of the seal 2 being parallel to the heat sealing surface of the mold 1). After the heat sealing is completed, the telescopic cylinder 31 retracts to drive the displacement plates 33 away from each other, that is, drives the moving block 42 away, that is, drives the swing block 41 connected thereto away from the mold 1, that is, drives the seal 2 and the baffle 46 away from the mold 1. Since the compression amount of the baffle 46 is larger, the seal 2 will first move away from the tubular mesh film and the sheet composite film on the mold 1, and then the baffle 46 will move away from the mold 1. During this process, even if the mesh bag is attached to the seal 2, it can be peeled off from the seal 2 by receiving the reverse thrust of the baffle 46.

[0031] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0032] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0033] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0034] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. A preheating sealing mechanism for a mesh bag machine, comprising a mold arranged in the middle and sealers arranged on both sides of the mold, characterized in that: It also includes a driving module, which includes a driving component and a swing connection component. The two swing connection components are arranged on both sides of the mold. The driving component is connected to the swing connection components and is used to drive the two swing connection components to approach or move away from the mold. The seal is installed on the side of the swing connection component facing the mold so that the seal can swing relative to the driving component to eliminate the parallelism error with the mold.

2. A preheat sealing mechanism for a mesh bag machine according to claim 1, characterized in that: The swing connection assembly includes a moving block and a swing block that can rotate relative to the moving block, the swing block is movably connected to the moving block, the seal is installed on the swing block, the moving block is connected to the driving assembly, and the driving assembly is used to drive the moving block to approach or move away from the mold.

3. A preheat sealing mechanism for a mesh bag machine according to claim 2, characterized in that: Two moving blocks are arranged on each side of the mold, which are arranged at the top and the bottom respectively. The upper and lower ends of the swing block are respectively rotatably connected with the corresponding moving blocks.

4. A preheat sealing mechanism for a mesh bag machine according to claim 3, characterized in that: Two sealers are arranged on each side of the mold, the swing block is connected to a connecting block on both sides of the horizontal extension direction of the mold heat sealing plane, the two sealers are connected to one connecting block respectively, and the sealer is located between the connecting block and the mold.

5. A preheat sealing mechanism for a mesh bag machine according to claim 4, characterized in that: A first elastic member is arranged between the bottom of the seal and the bottom of the connecting block, so as to enable the seal to swing in the up-and-down direction, thereby eliminating the parallelism error of the seal in the up-and-down direction.

6. A preheat sealing mechanism for a mesh bag machine according to claim 5, characterized in that: A second elastic member is provided on the side of the swing block facing the heat-sealing plane of the mold for connecting with a baffle; the baffle is hollowed out, and a convex portion is provided at a position of the sealer opposite to the baffle, and the baffle is used to prevent the mesh bag from sticking to the sealer after heat sealing is completed.

7. The preheat sealing mechanism for a mesh bag machine according to claim 4, characterized in that: A limit block is respectively arranged on both sides of one of the moving blocks on each side of the mold in a vertical direction to the heat-sealing surface of the mold, and one of the connecting blocks is located between the two limit blocks to limit the swing angle of the swing block.

8. The preheat sealing mechanism for a mesh bag machine according to claim 4, characterized in that: The swing block is provided with a bidirectional screw rod which can rotate and is transversely parallel to the heat sealing plane of the mold. A guide rod is also passed through the swing block. The connecting block is passed through the bidirectional screw rod and the guide rod at the same time. The bidirectional screw rod is rotated to adjust the distance between the two connecting blocks.

9. The preheat sealing mechanism for a mesh bag machine according to claim 2, characterized in that: The driving assembly includes a telescopic cylinder, a guide member and a displacement plate. The guide member is fixedly installed on the periphery of the mold; the two displacement plates are inserted through the guide member and are respectively located on both sides of the mold. The extended end of the telescopic cylinder is hinged with a connecting rod assembly, and the connecting rod assembly is movably connected to the displacement plate. The guiding direction of the guide member is perpendicular to the fitting surface of the mold; the moving block is fixedly connected to the displacement plate.

10. A preheat sealing mechanism for a mesh bag machine according to claim 9, characterized in that: The connecting rod assembly includes a movable block hinged to the extended end of the telescopic cylinder, and also includes a first connecting rod hinged to the top and the middle of the movable block respectively, and the two first connecting rods are respectively hinged to a displacement plate; there are two guide members, and the guide members include a guide shaft and a linear bearing. The two guide shafts are arranged side by side up and down, and the axial direction is perpendicular to the heat sealing plane of the mold. A linear bearing is installed on the upper and lower parts of the displacement plate, and the linear bearings are passed through the corresponding guide shafts. Limiting plates are respectively provided at both ends of the guide shaft to prevent the displacement plate from falling out.

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