Foam stabilizing mechanism of film blowing machine

Abstract

The utility model relates to the technical field of film blowing machines, in particular to a bubble stabilizing mechanism of a film blowing machine, which comprises a fixing frame, a bubble stabilizing frame, a lifting driving component arranged on the fixing frame and used for driving the bubble stabilizing frame to lift, a plurality of groups of bubble stabilizing components arranged on the bubble stabilizing frame in a rotational symmetry manner, and a contraction driving component arranged on the bubble stabilizing frame and used for driving the bubble stabilizing components to act. The bubble stabilizing mechanism has the beneficial effects that the stability of the bubble stabilizing mechanism is improved, and the fault occurrence rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing machines, and particularly relates to a bubble stabilizing mechanism of a film blowing machine. Background Art

[0002] A film blowing machine melts plastic particles and then blows them into bubble films. The cylindrical bubble films blown are formed into packaging bags after cooling, edge folding, printing, plastic sealing, and punching. Among them, during the cooling process, the bubble films blown by the film blowing machine need to be stabilized by a bubble stabilizing mechanism.

[0003] The utility model patent with the patent application number CN202220988329.3 discloses a bubble stabilizing mechanism and a film blowing machine, including a frame body (1), a driving member (2), and multiple groups of bubble stabilizing components (3). The driving member (2) and the multiple groups of bubble stabilizing components (3) are arranged on the frame body (1), and the multiple groups of bubble stabilizing components (3) are all driven by the driving member (2). Among them, a single group of bubble stabilizing components (3) includes a linkage member (31), a transmission member (32), a first connecting member (33), a second connecting member (34), a bearing member (35), and multiple guide rollers (36). The linkage member (31) is rotatably arranged on the frame body (1) and connected to the output end of the driving member (2). The transmission member (32) is screwed onto the linkage member (31). One end of the first connecting member (33) is hinged to the transmission member (32), and the other end of the first connecting member (33) is hinged to the bearing member (35). One end of the second connecting member (34) is hinged to the linkage member (31), and the other end of the second connecting member (34) is slidably connected to the bearing member (35). The first connecting member (33) is hinged to the second connecting member (34), and the multiple guide rollers (36) are rotatably arranged on the bearing member (35).

[0004] When this bubble stabilizing mechanism works, the driving member 2 drives the driving part 21 to rotate, drives the linkage part 311 to rotate through the synchronizing member, and then drives the linkage member 31 to rotate. Since the transmission member 32 is threadedly connected to the linkage member 31, when the linkage member 31 rotates, it drives the transmission member 32 to move linearly. During the linear movement of the transmission member 32, it drives the first connecting member 33 and the second connecting member 34 to swing, and then drives the bearing member 35 to move horizontally inwards or outwards, and the multiple guide rollers 36 move accordingly. Such a structure, in the actual production process, if one of the transmission members slips, the bubble stabilizing component including this transmission member will not be able to expand and contract, affecting the overall operation of the bubble stabilizing mechanism. Summary of the Invention

[0005] The technical problem to be solved by the present utility model is to provide a bubble stabilizing mechanism for a film blowing machine aiming at the deficiencies of the above-mentioned prior art, improve the stability of the bubble stabilizing mechanism, and reduce the failure rate.

[0006] To achieve the above object, the present utility model provides the following technical solution: A bubble stabilizing mechanism for a film blowing machine, including a fixed frame and a bubble stabilizing frame. An elevating drive assembly for driving the bubble stabilizing frame to lift and lower is provided on the fixed frame. A plurality of groups of bubble stabilizing components arranged in rotational symmetry are provided on the bubble stabilizing frame. A contraction drive assembly for driving the bubble stabilizing components to act is further provided on the bubble stabilizing frame. The bubble stabilizing frame is cylindrical, including an upper ring frame, a middle ring frame, a lower ring frame arranged in sequence from top to bottom in the vertical direction, and a plurality of contraction adjustment lead screws arranged at equal angles. One end of the contraction adjustment lead screw passes through the upper ring frame and is linked with the contraction drive assembly, and the other end passes through the middle ring frame and is rotatably connected with the lower ring frame. A first nut seat threadedly connected with the contraction adjustment lead screw is provided on the middle ring frame. The bubble stabilizing component includes a contraction upper column, a contraction lower column, a first connecting arm, a second connecting arm, a third connecting arm, a connecting piece, and a plurality of guide rollers. The upper end of the contraction upper column is fixedly connected with the upper ring frame, and the lower end is suspended. The contraction lower column is coaxially arranged with the contraction upper column, its upper end is suspended, and its lower end is fixedly connected with the middle ring frame. One end of the first connecting arm is hinged to the suspended end of the contraction upper column, and the other end is hinged to the middle part of the second connecting arm. One end of the second connecting arm is hinged to the suspended end of the contraction lower column, and the other end is inclined upward and hinged to the connecting piece. The connecting piece is suspended in the vertical direction. The plurality of guide rollers are arranged on the connecting piece at the same interval in the vertical direction. One end of the third connecting arm is hinged to the contraction lower column, and the other end is inclined upward and hinged to the connecting piece. The third connecting arm is located below the second connecting arm and the two are parallel to each other.

[0007] The present utility model with the above characteristics: By adding a middle ring frame and arranging the first nut seat threadedly connected with the contraction adjustment lead screw on the middle ring frame, when the contraction drive assembly drives the contraction adjustment lead screw to rotate, the first nut seat drives the middle ring frame to lift and lower along the axial direction of the contraction adjustment lead screw. The movement of the middle ring frame drives the contraction lower column to lift and lower. Such a structural setting links all the bubble stabilizing components. As long as one first nut seat can work normally, the middle ring frame can lift and lower normally, and all the bubble stabilizing components can work normally, improving the stability of the bubble stabilizing mechanism and reducing the failure rate; The lifting and lowering of the contraction lower column drives the third connecting arm and the second connecting arm to act. By controlling the lifting and lowering height of the contraction lower column, the inclination angles of the third connecting arm and the second connecting arm are adjusted, so that the connecting piece moves horizontally inwards or outwards, thereby realizing the adjustment of the distance between multiple groups of bubble stabilizing components according to bubble films of different sizes, ensuring the stability of the bubble film, and improving the applicability of the bubble stabilizing mechanism.

[0008] A further setting of the present utility model is that the lifting drive assembly includes a plurality of lifting adjustment lead screws arranged at equal angles within the fixed frame. The upper end of the lifting adjustment lead screw is provided with a first sprocket, and the lower end is rotatably connected to the fixed frame. A second nut seat is threadedly connected to the lifting adjustment lead screw, and the second nut seat is fixedly connected to the upper ring frame. A lifting motor is installed on the fixed frame, and the output end of the lifting motor is provided with a second sprocket. A chain is provided between the first sprocket and the second sprocket.

[0009] The present utility model with the above characteristics: By setting the lifting adjustment lead screw, driving the rotation of the lifting adjustment lead screw causes the second nut seat to move axially along the lifting adjustment lead screw, thereby driving the bubble stabilizing frame fixedly connected to the second nut seat to lift, so as to realize the height adjustment of the bubble stabilizing frame in the fixed frame, and it can be adjusted according to bubble films of different sizes, improving the compatibility of the equipment, helping to stabilize the form of the bubble film, and preventing the bubble film from shifting or deforming during the blowing process.

[0010] A further setting of the present utility model is that the contraction drive assembly includes a contraction motor arranged on the upper ring frame. The output end of the contraction motor is provided with a third sprocket. One end of the contraction adjustment lead screw passing through the upper ring frame is provided with a fourth sprocket. A plurality of fifth sprockets are also provided on the upper ring frame, and the fifth sprockets are located between the two fourth sprockets. A chain is provided between the third sprocket, the fourth sprocket and the fifth sprockets.

[0011] The present utility model with the above characteristics: The linkage between the contraction drive assembly and the contraction adjustment lead screw is realized through the transmission mode of the chain and sprockets. The transmission mode has a compact structure and less energy loss; by additionally setting the fifth sprocket, the stability of the transmission is increased.

[0012] A further setting of the present utility model is that a plurality of support rods arranged at equal angles are further provided within the bubble stabilizing frame. One end of the support rod is fixedly connected to the upper ring frame, and the other end passes through the middle ring frame and is fixedly connected to the lower ring frame. A linear bearing slidably connected to the support rod is provided on the middle ring frame.

[0013] The present utility model with the above characteristics: By setting the support rods, a stable multi-point support structure is formed between the upper ring frame and the lower ring frame, improving the stability and strength of the bubble stabilizing frame; a linear bearing is sleeved on the support rod, which has an auxiliary effect on the lifting of the middle ring frame and improves the lifting smoothness of the middle ring frame.

[0014] A further setting of the present utility model is that the fixed frame is square, and installation inclined plates are provided at the four right angles at the upper and lower ends of the fixed frame. The installation inclined plate and the side of the fixed frame enclose an isosceles right triangle. An installation connecting plate is provided in the middle of the installation inclined plate, and a bearing seat is provided on the installation connecting plate. Both ends of the lifting adjustment lead screw are rotatably connected to the bearing seat.

[0015] The utility model with the above characteristics: the structural setting of the installation inclined plate increases the structural stability of the fixing frame; the installation connecting plate is arranged in the middle of the installation inclined plate, providing an installation platform for the installation of the lifting adjustment screw rod and reducing the installation difficulty.

[0016] The following further elaborates on the present utility model in conjunction with the drawings and embodiments. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the fixing frame of an embodiment of the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the bubble stabilizing frame of an embodiment of the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the bubble stabilizing frame and a single group of bubble stabilizing components of an embodiment of the present utility model. Specific Embodiment

[0021] This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

[0022] As Figure 1 shown, a bubble stabilizing mechanism of a blown film machine includes a fixing frame 1 and a bubble stabilizing frame 2. The bubble stabilizing frame is located in the middle of the fixing frame. An elevation driving assembly 3 for driving the elevation of the bubble stabilizing frame 2 is provided on the fixing frame 1. A plurality of groups of bubble stabilizing components 4 arranged in rotational symmetry are provided on the bubble stabilizing frame 2. A contraction driving assembly 5 for driving the movement of the bubble stabilizing components 4 is further provided on the bubble stabilizing frame 2. The bubble stabilizing frame 2 is in a cylindrical shape and includes an upper ring frame 21, a middle ring frame 22, a lower ring frame 23 arranged in sequence from top to bottom in the vertical direction, and a plurality of contraction adjustment screw rods 24 arranged at equal angles. One end of the contraction adjustment screw rod 24 passes through the upper ring frame 21 and is linked with the contraction driving assembly 5, and the other end passes through the middle ring frame 22 and is rotatably connected to the lower ring frame 23. A first nut seat 25 threadedly connected to the contraction adjustment screw rod 24 is provided on the middle ring frame 22. A plurality of support rods 26 arranged at equal angles are further provided inside the bubble stabilizing frame 2. One end of the support rod 26 is fixedly connected to the upper ring frame 21, and the other end passes through the middle ring frame 22 and is fixedly connected to the lower ring frame 23. A linear bearing 27 slidably connected to the support rod 26 is provided on the middle ring frame 22.

[0023] The foam stabilizing assembly 4 includes a retractable upper upright column 41, a retractable lower upright column 42, a first connecting arm 43, a second connecting arm 44, a third connecting arm 45, a connecting piece 46, and a number of guide rollers 47. The upper end of the retractable upper upright column 41 is fixedly connected to the upper ring frame 21, and the lower end is suspended. The retractable lower upright column 42 is coaxially arranged with the retractable upper upright column 41, its upper end is suspended, and the lower end is fixedly connected to the middle ring frame 22. One end of the first connecting arm 43 is hinged to the suspended end of the retractable upper upright column 41, and the other end is hinged to the middle part of the second connecting arm 44. One end of the second connecting arm 44 is hinged to the suspended end of the retractable lower upright column 42, and the other end is inclined upward and hinged to the connecting piece 46. The connecting piece 46 is suspended in the vertical direction. A number of guide rollers 47 are arranged on the connecting piece 46 at the same intervals in the vertical direction. One end of the third connecting arm 45 is hinged to the retractable lower upright column 42, and the other end is inclined upward and hinged to the connecting piece 46. The third connecting arm 45 is located below the second connecting arm 44 and they are parallel to each other.

[0024] The lifting drive assembly 3 includes a number of lifting adjustment lead screws 31 arranged at equal angles in the fixed frame 1. The fixed frame 1 is square. Installation inclined plates 11 are provided at the four right angles at the upper and lower ends of the fixed frame 1. The installation inclined plates 11 and the side of the fixed frame 1 form an isosceles right triangle. An installation connecting plate 12 is provided in the middle of the installation inclined plate 11. A bearing seat 13 is provided on the installation connecting plate 12. Both ends of the lifting adjustment lead screw 31 are rotatably connected to the bearing seat 13. A first sprocket 32 is provided at the upper end of the lifting adjustment lead screw 31 after passing through the bearing seat 13. A second nut seat 33 is threadedly connected to the lifting adjustment lead screw 31. The second nut seat 33 is fixedly connected to the upper ring frame 21. A lifting motor 34 is installed on the fixed frame 1. A second sprocket 35 is provided at the output end of the lifting motor 34. A chain (not shown in the figure) is provided between the first sprocket 32 and the second sprocket 35.

[0025] The retraction drive assembly 5 includes a retraction motor 51 provided on the upper ring frame 21. A third sprocket 52 is provided at the output end of the retraction motor 51. A fourth sprocket 53 is provided at one end of the retraction adjustment lead screw 24 passing through the upper ring frame 21. A number of fifth sprockets 54 are also provided on the upper ring frame 21. The fifth sprockets 54 are located between the two fourth sprockets 53. A chain (not shown in the figure) is provided between the third sprocket 52, the fourth sprocket 53, and the fifth sprockets 54.

[0026] In the actual production process, when it is necessary to adjust the distance between multiple foam stabilizing components, the contraction motor rotates and is transmitted to the contraction adjustment screw rod through a chain and sprocket. The contraction adjustment screw rod rotates, and the first nut seat threadedly connected to the contraction adjustment screw rod moves up or down along the axial direction of the contraction adjustment screw rod. The lifting and lowering of the first nut seat drives the middle ring frame to lift and lower, the lifting and lowering of the middle ring frame drives the contraction lower column to lift and lower, and the lifting and lowering of the contraction lower column drives the second connecting arm and the third connecting arm hinged to it to swing around the hinge point. Since the second connecting arm and the third connecting arm are parallel and both are hinged to the contraction lower column, the connecting piece hinged to the second connecting arm and the third connecting arm makes a horizontal movement of extending or contracting. Multiple foam stabilizing components are arranged in rotational symmetry to form a shaping ring. By changing the inclination angle of the second connecting arm and the third connecting arm, the size of the shaping ring is changed. When the middle ring frame descends, the shaping ring increases; when the middle ring frame ascends, the shaping ring decreases. When the contraction lower column ascends to abut against the contraction upper column, the shaping ring is the smallest; when the contraction lower column descends until the second connecting arm and the third connecting arm cannot swing, the shaping ring is the largest.

[0027] When it is necessary to adjust the height of the foam stabilizing frame in the fixed frame, the lifting motor rotates and is transmitted to the lifting adjustment screw rod through a chain and sprocket. The lifting adjustment screw rod rotates, and the second nut seat threadedly connected to the lifting adjustment screw rod moves up or down axially along the lifting adjustment screw rod. The second nut seat drives the upper ring frame to lift and lower, thereby realizing the lifting and lowering of the entire foam stabilizing frame in the fixed frame.

Claims

1. A bubble stabilizing mechanism for a film blowing machine, comprising a fixed frame and a bubble stabilizing frame. An elevating drive assembly for driving the bubble stabilizing frame to move up and down is provided on the fixed frame. A plurality of groups of bubble stabilizing assemblies arranged in rotational symmetry are provided on the bubble stabilizing frame. A contraction drive assembly for driving the bubble stabilizing assemblies to act is further provided on the bubble stabilizing frame, characterized in that: The foam stabilizing frame includes an upper ring frame, a middle ring frame, a lower ring frame arranged sequentially from top to bottom in the vertical direction, and several shrinkage adjustment screw rods arranged at equal angles. One end of each shrinkage adjustment screw rod passes through the upper ring frame and is linked with a shrinkage drive assembly, and the other end passes through the middle ring frame and is rotatably connected to the lower ring frame. A first nut seat threadedly connected to the shrinkage adjustment screw rod is provided on the middle ring frame. The foam stabilizing assembly includes a shrinkage upper column, a shrinkage lower column, a first connecting arm, a second connecting arm, a third connecting arm, a connecting piece, and several guide rollers. The upper end of the shrinkage upper column is fixedly connected to the upper ring frame, and the lower end is suspended. The shrinkage lower column is coaxially arranged with the shrinkage upper column, its upper end is suspended, and its lower end is fixedly connected to the middle ring frame. One end of the first connecting arm is hinged to the suspended end of the shrinkage upper column, and the other end is hinged to the middle part of the second connecting arm. One end of the second connecting arm is hinged to the suspended end of the shrinkage lower column, and the other end is inclined upward and hinged to the connecting piece. The connecting piece is suspended in the vertical direction. The several guide rollers are arranged on the connecting piece at equal intervals in the vertical direction. One end of the third connecting arm is hinged to the shrinkage lower column, and the other end is inclined upward and hinged to the connecting piece. The third connecting arm is located below the second connecting arm and the two are parallel to each other.

2. The bubble stabilizing mechanism of a blown film machine according to claim 1, characterized in that: The lifting drive assembly includes several lifting adjustment screw rods arranged at equal angles in a fixed frame. A first sprocket is provided at the upper end of each lifting adjustment screw rod, and the lower end is rotatably connected to the fixed frame. A second nut seat is threadedly connected to the lifting adjustment screw rod, and the second nut seat is fixedly connected to the upper ring frame. A lifting motor is installed on the fixed frame, and a second sprocket is provided at the output end of the lifting motor. A chain is provided between the first sprocket and the second sprocket.

3. The bubble stabilizing mechanism of a blown film machine according to claim 1, characterized in that: The shrinkage drive assembly includes a shrinkage motor arranged on the upper ring frame. A third sprocket is provided at the output end of the shrinkage motor. A fourth sprocket is provided at one end of the shrinkage adjustment screw rod passing through the upper ring frame. Several fifth sprockets are also provided on the upper ring frame, and the fifth sprockets are located between the two fourth sprockets. A chain is provided between the third sprocket, the fourth sprocket, and the fifth sprockets.

4. The bubble stabilizing mechanism of a blown film machine according to claim 1 or 3, characterized in that: Several support rods arranged at equal angles are further provided in the foam stabilizing frame. One end of each support rod is fixedly connected to the upper ring frame, and the other end passes through the middle ring frame and is fixedly connected to the lower ring frame. A linear bearing slidably connected to the support rod is provided on the middle ring frame.

5. The bubble stabilizing mechanism of a blown film machine according to claim 2, characterized in that: The fixed frame is square. Installation inclined plates are provided at the four right angles at the upper and lower ends of the fixed frame. The installation inclined plates and the side edges of the fixed frame enclose an isosceles right triangle. An installation connecting plate is provided in the middle of the installation inclined plate, and a bearing seat is provided on the installation connecting plate. Both ends of the lifting adjustment screw rod are rotatably connected to the bearing seat.

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