A stretching and smoothing device for film blowing machine

Abstract

The present invention discloses a stretching and smoothing device for a film blowing machine, and relates to the technical field of film blowing machines. The device comprises a fixed frame, the fixed frame is fixedly connected with symmetrically distributed fixed rings, the symmetrically distributed fixed rings are rotatably connected with circumferentially evenly distributed driving rods, the circumferentially evenly distributed driving rods are all provided with connecting plates, the connecting plates are slidably connected with a plurality of groups of support frames in a linear array, the opposite sides of the symmetrically distributed support frames are rotatably connected with connecting seats, the opposite sides of two adjacent connecting seats on the same group of support frames are commonly fixed with connecting rods, the connecting rods are provided with guide tubes, and the outer side of the guide tubes is provided with guide layers. The present invention converts the guide layer from a straight tube to an arc tube, increases the contact area between the guide layer and the film bubble, enables the guide layer to better adapt to the shape of the film bubble, provides more uniform support, thereby reducing the shaking or fluctuation of the film bubble, and enables the film bubble to maintain a more uniform thickness and better appearance quality during the cooling process.

Description

Technical Field

[0001] The invention relates to the technical field of film blowing machines, and in particular to a stretching and smoothing device for film blowing machines. Background Art

[0002] In the process of film preparation, the smoothing function of the film blowing machine runs through the entire production process, which is mainly reflected in the following structures: 1. Cooling air ring, which provides uniform cold air to the film bubbles to accelerate the cooling process of the film, reduce the irregularities of the film surface, and thus improve the flatness of the film; 2. Traction device, which is used to stretch the film and control its thickness. Appropriate stretching can not only adjust the thickness of the film, but also make it smoother; 3. Thickness control device, which monitors the thickness change of the film in real time to avoid uneven film caused by uneven thickness; 4. Bubble stability control, which improves the quality of the film by optimizing the shape and size of the bubble; 5. Winding system, which further improves the flatness of the film by adjusting the winding tension; 6. Film stabilizer (bubble stabilizing rack), which maintains the shape of the bubble during the rising process of the film bubble to prevent the bubble from swinging too much, thereby affecting the flatness of the film.

[0003] The existing bubble stabilizer usually includes an annular fixing frame, inside which are installed a plurality of horizontal bubble stabilizing rollers. The bubble stabilizing rollers are arranged in multiple layers and multiple rows, and the bubble stabilizing rollers on the same layer are arranged in a circle. When working, the bubble stabilizing rollers surround the film bubble in the center to maintain the center of the film bubble in a relatively stable position. However, during the use of the existing bubble stabilizer, the figure formed by the bubble stabilizing rollers thereon is a regular polygon rather than a circle. Therefore, during the use of the bubble stabilizing rollers, only the position tangent to the film bubble will contact the film bubble, and the film bubble cannot be uniformly supported. At the same time, when the film bubble contacts the junction of the two bubble stabilizing rollers, the film bubble squeezes the bubble stabilizing roller, and the film bubble is easily creased by the reaction force at the junction of the bubble stabilizing rollers, resulting in wrinkles in the produced film, which affects the product quality. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention proposes a stretching and smoothing device for a film blowing machine.

[0005] The technical solution of the present invention is: a stretching and smoothing device for a film blowing machine includes a fixed frame, the fixed frame is fixed with symmetrically distributed fixed rings, the symmetrically distributed fixed rings are commonly fixed with circumferentially uniformly distributed positioning rods, the symmetrically distributed fixed rings are commonly rotatably connected with circumferentially uniformly distributed driving rods, one of the fixed rings is provided with a driving module for driving the circumferentially uniformly distributed driving rods to rotate, and is characterized in that: it also includes circumferentially uniformly distributed connecting plates, the connecting plates are arranged on one side of the driving rods close to the central axis of the fixed ring, the connecting plates, the adjacent driving rods and the adjacent positioning rods are commonly provided with a connecting module, and the connecting plate is close to the fixed ring The central axis is slidably connected to several groups of support frames in a linear array, each group of the support frames is provided with two symmetrically distributed support frames, a spring is provided between the symmetrically distributed support frames, the opposite sides of the symmetrically distributed support frames are rotatably connected with connecting seats, the opposite sides of the two connecting seats on the same group of the support frames are commonly fixed with a connecting rod, a fixing component is provided on the connecting rod, the connecting rod is provided with a guide tube through the fixing component thereon, a guide layer is provided on the outer side of the guide tube, the guide tube and the guide layer thereon and the connecting rod are all made of elastic deformable material, the symmetrically distributed support frames are commonly provided with a driving component, and the driving component is used to drive the connecting rod to bend.

[0006] As a preferred technical solution of the present invention, the inner and outer parts of the guide tube are both provided with linear array annular grooves, the cross-section of the annular groove on the guide tube is an isosceles trapezoid, and the isosceles trapezoids of the cross-sections of two adjacent annular grooves inside and outside the same guide tube are distributed symmetrically with respect to the center.

[0007] As a preferred technical solution of the present invention, a linear array of toothed grooves is provided on one side of the connecting rod close to the central axis of the fixing ring.

[0008] As a preferred technical solution of the present invention, the fixing assembly includes a first connecting tube, the first connecting tube is fixedly connected to the connecting rod, the outer side of the first connecting tube is detachably connected with a linear array bearing, the outer ring of the bearing is fixedly connected with a first connecting ring, a guide ring is provided on the outer side of the first connecting ring, the interior of the guide tube is fixedly connected with a second connecting tube, the interior of the second connecting tube is fixedly connected with a second connecting ring of the linear array, a limiting groove is provided inside the second connecting ring, and the guide ring on the first connecting ring slides in the limiting groove of the second connecting ring.

[0009] As a preferred technical solution of the present invention, the interior of the second connecting ring is provided with symmetrically distributed inclined surfaces, and the distance between the symmetrically distributed inclined surfaces gradually increases from the middle to both sides, so as to make the second connecting ring easy to bend.

[0010] As a preferred technical solution of the present invention, the limit groove on the second connecting ring is located at the intersection of the symmetrically distributed inclined surfaces thereon, the cross-section of the upper limit groove is arc-shaped, and the opening distance of the notch of the upper limit groove of the second connecting ring is smaller than the diameter of the circle where its cross-section is located.

[0011] As a preferred technical solution of the present invention, the shape of the cross-section of the first connecting ring is divided into a rectangular part and a triangular part, and the cross-section of the guide ring on the first connecting ring is arc-shaped and located at the top angle of its triangular part, and the guide ring on the first connecting ring fits tightly with the limiting groove on the second connecting ring.

[0012] As a preferred technical solution of the present invention, the driving assembly includes symmetrically distributed liquid storage rings, which are respectively fixed to one side of an adjacent support frame, the connecting seat passes through the adjacent liquid storage ring and is rotatably connected thereto, the connecting seat is fixed with a movable plate, the movable plate slides in the adjacent liquid storage ring, the interior of the liquid storage ring is fixed with a limiting plate, an elastic member is fixed between the limiting plate and the movable plate located in the same liquid storage ring, and all the liquid storage rings are commonly externally connected to a hydraulic pump.

[0013] As a preferred technical solution of the present invention, it also includes a speed reduction mechanism, which is arranged on the connecting rod, and is used to reduce the rotation speed of the guide tube. The speed reduction mechanism includes a liquid storage shell, and the liquid storage shell is fixedly connected to one end of the connecting rod. The end of the connecting rod close to the liquid storage shell is rotatably connected to a fixed plate, and the fixed plate is fixedly connected to the guide tube on the same liquid storage shell, and the fixed plate on the same liquid storage shell is rotatably connected to the liquid storage shell. The liquid storage shell is rotatably connected with a rotating plate inside, and a transmission module is arranged between the rotating plate and the fixed plate that are rotatably connected to the same liquid storage shell. The side of the rotating plate away from the fixed plate is fixedly connected to a limiting plate, and the limiting plate slides in the adjacent liquid storage shell, and a through hole is arranged on the limiting plate.

[0014] As a preferred technical solution of the present invention, the diameter of the through holes on the limiting plate in the linear array on the same connecting plate gradually decreases from top to bottom, and the transmission module can be selected as a ratchet pawl structure, which is used to limit the unidirectional rotation of the rotating plate and the fixed plate.

[0015] The present invention has the following advantages: the present invention changes the curvature of the extruded tube, converts the guide layer from a straight tube to an arc-shaped tube, increases the contact area between the guide layer and the film bubble, enables the guide layer to better adapt to the shape of the film bubble, and provides more uniform support, thereby reducing the shaking or fluctuation of the film bubble, and enables the film bubble to maintain a more uniform thickness and better appearance quality during the cooling process, reducing flaws and defects.

[0016] During the deformation of the guide tube, the guide tube drives the adjacent second connecting ring to deform synchronously, and at the same time, the second connecting ring is always in contact with the adjacent first connecting ring during the deformation process, so as to avoid the guide tube being affected by the adjacent bearings during the bending process and causing flat areas, which affects the curvature of the adjacent guide tube and the adjacent guide layer after bending.

[0017] The rotation speed of the limiting plate of the linear array gradually decreases from top to bottom, so that the reverse rotation speed of the linear array guide tube gradually decreases from top to bottom, thereby buffering the membrane bubble, reducing the speed of the membrane bubble falling downward, and further reducing the gravitational potential energy of the membrane bubble, avoiding deformation of the membrane bubble due to downward accumulation, causing wrinkles in the subsequently produced film, and ensuring the flatness of the membrane bubble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the positioning rod and the driving rod of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the driving rod and the connecting plate of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide tube and the liquid storage shell of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the support frame and the connecting seat of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide tube and the first connecting tube of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting rod and the fixing plate of the present invention;

[0025] Figure 8 is a three-dimensional structural cross-sectional view of the liquid storage shell of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rotating plate and the current limiting plate of the present invention;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the second connecting pipe and the second connecting ring of the present invention;

[0028] Fig.11 It is a schematic diagram of the three-dimensional structure of the bearing and the first connecting ring of the present invention;

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the first connecting ring and the second connecting ring of the present invention;

[0030] Fig.13 For the present invention Figure 5 Enlarged view of the three-dimensional structure at A in the middle.

[0031] Marked in the figure: 1-fixed frame, 2-fixed ring, 3-positioning rod, 4-driving rod, 5-connecting plate, 51-support frame, 6-connecting seat, 7-connecting rod, 8-guide tube, 9-first connecting tube, 10-bearing, 11-first connecting ring, 12-second connecting tube, 13-second connecting ring, 14-liquid storage ring, 15-movable plate, 16-limiting plate, 17-liquid storage shell, 18-fixed plate, 19-rotating plate, 20-current limiting plate. DETAILED DESCRIPTION

[0032] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this document are only for the positions of the structures shown in the corresponding drawings. The serial numbers assigned to the components in this document, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning.

[0033] Embodiment 1: In view of the problem that during the use of the bubble stabilizer on the existing film blowing machine, the shape formed by the bubble stabilizing roller is a regular polygon rather than a circle, and the area in contact with the film bubble is small, and the film bubble cannot be evenly supported. At the same time, when the film bubble contacts the junction of the two bubble stabilizing rollers, it is easy to be intercepted by the bubble stabilizing rollers and produce creases, resulting in wrinkles in the produced film, which affects the product quality. The present invention solves the problem by the following measures:

[0034] A film blowing machine stretching and smoothing device, such as Figure 1-Figure 8As shown, it includes a fixing frame 1, the fixing frame 1 is fixed with two fixing rings 2 symmetrically distributed in the upper and lower parts, the fixing rings 2 are regular octagonal rings, the two fixing rings 2 are commonly fixed with eight positioning rods 3 evenly distributed in the circumferential direction, the eight positioning rods 3 are respectively located on the midlines of the eight sides of the fixing ring 2, the two fixing rings 2 are commonly rotatably connected with eight driving rods 4 evenly distributed in the circumferential direction, wherein the driving rods 4 are closer to the central axis of the fixing ring 2 than the positioning rods 3, and a driving module for driving the driving rods 4 evenly distributed in the circumferential direction to rotate is arranged on the upper fixing ring 2, the driving module is an existing device and is not shown in the figure, wherein the driving module can be a combination of multiple sprockets, chains and motors, wherein the sprockets are respectively installed on the output shaft of the motor and the driving rods 4 evenly distributed in the circumferential direction On the top, the chain is wound on multiple sprockets, and a connecting plate 5 is provided on one side of the driving rod 4 close to the central axis of the fixing ring 2. The connecting plate 5, the driving rod 4 and the positioning rod 3 are jointly provided with a connecting module, and the driving rod 4 is provided with two external threads symmetrically distributed up and down. The connecting module is an existing device, and the figure takes the telescopic frame as an example to show, wherein one end of the telescopic frame is slidably connected to the adjacent connecting plate 5, and the other end is slidably connected to the adjacent positioning rod 3, and is threadedly connected to the two external threads on the adjacent driving rod 4, and the connecting plate 5 is slidably connected to one side of the central axis of the fixing ring 2 with a plurality of groups of support frames 51 in a linear array, and four groups are shown in the figure as an example, wherein the four groups of support frames 51 on two adjacent connecting plates 5 are staggered, and each group of support frames 51 is provided with There are two symmetrically distributed support frames 51, and a spring is arranged between them. The spring is in a compressed state in the initial position, and is used to drive the symmetrically distributed support frames 51 to move synchronously. The opposite sides of the symmetrically distributed support frames 51 are rotatably connected with connecting seats 6. The two connecting seats 6 connected to the same group of support frames 51 are set as a group. The opposite sides of each group of connecting seats 6 are commonly fixed with connecting rods 7, and a fixing component is arranged on the connecting rod 7. The connecting rod 7 is provided with a guide tube 8 through the fixing component thereon. The four guide tubes 8 located on the same connecting plate 5 are set as a group, and a guide layer is arranged on the outer side of the guide tube 8. The four guide layers adjacent to the same connecting plate 5 are set as a group. The guide tubes 8 and the guide layers thereon are both represented by eight groups in the figure and the text. Taking this as an example, the guide layer is made of a flexible material, and the guide layer is in contact with the outer side of the membrane bubble. In the process of the membrane bubble moving upward, an upward force is applied to the guide layer, so that the guide layer drives the guide tube 8 to rotate synchronously. The connecting rod 7 is made of an elastic deformable material, so that the connecting rod 7 can be bent at will. A linear array of toothed grooves is provided on one side of the connecting rod 7 close to the central axis of the fixed ring 2, which is used to limit the bending direction of the connecting rod 7 and prevent the middle part of the connecting rod 7 from moving toward the center of the fixed ring 2 when bending. The guide tube 8 is made of an elastic deformable material, and the connecting rod 7 drives the guide tube 8 thereon to bend synchronously during the bending process. The inner and outer sides of the guide tube 8 are both provided with linear array annular grooves, and the cross-section of the annular groove on the guide tube 8 is an isosceles trapezoid.The isosceles trapezoids of the two adjacent ring groove sections inside and outside the same guide tube 8 are distributed symmetrically with the center, and the areas of the isosceles trapezoids of the two adjacent ring groove sections inside and outside the same guide tube 8 are the same, so that the guide tube 8 can be deformed uniformly during the bending process and bent into an arc with the same curvature at all locations.

[0035] like Figure 4-Figure 6 and Figure 8-Figure 11As shown, the fixed component includes a first connecting tube 9, which is fixedly connected to the connecting rod 7. The first connecting tube 9 is made of elastic deformable material. The connecting rod 7 drives the first connecting tube 9 thereon to bend synchronously during the bending process. The outer side of the first connecting tube 9 is detachably connected with a linear array of bearings 10. The specific number of the linear array of bearings 10 can be selected by the staff according to work needs, but it is necessary to select an odd number. The figure and the text all take five as an example to show, wherein the middle bearing 10 is located in the middle of the adjacent first connecting tube 9, and the five bearings 10 located on the same first connecting tube 9 are set as a group. The first connecting tube 9 drives the five bearings 10 thereon to move synchronously during the bending process, and the outer ring of the bearing 10 is fixedly connected with A first connecting ring 11 is provided with a guide ring on the outside of the first connecting ring 11. The cross section of the guide ring on the first connecting ring 11 is an arc shape, and the distance between the contact position of the first connecting ring 11 and the guide ring thereon on the cross section is smaller than the diameter of the guide ring cross section. A second connecting tube 12 is fixedly connected to the inside of the guide tube 8. A linear array of second connecting rings 13 is fixedly connected to the inside of the second connecting tube 12. The specific number of the second connecting rings 13 must be consistent with the specific number of the bearings 10. In the figure, five second connecting rings 13 are used as an example to illustrate the five second connecting rings 13 on the same second connecting tube 12. A group of five second connecting rings 13 are provided on the inside of the second connecting ring 13. Symmetrically distributed inclined surfaces are provided. The distance between the symmetrically distributed inclined surfaces gradually increases from the middle to both sides. The increase is used to reduce the stress required when the second connecting ring 13 is bent, so that the second connecting ring 13 is easy to be bent. The second connecting tube 12 acts in the reverse direction on the five second connecting rings 13 thereon during the bending process, so that the side of the second connecting ring 13 close to the center of the fixing ring 2 is stretched, and the side away from the fixing ring 2 is compressed. At the same time, during the deformation of the second connecting ring 13, the angle between the two inclined surfaces on the second connecting ring 13 close to the center of the fixing ring 2 increases, and the angle between the two inclined surfaces on the second connecting ring 13 away from the center of the fixing ring 2 decreases. A limiting groove is provided inside the second connecting ring 13, and the guide ring on the first connecting ring 11 slides in the limiting groove of the adjacent second connecting ring 13, so as to reduce the first connecting ring 11 and the adjacent second connecting ring 13. The contact area of ​​the ring 13 prevents the guide tube 8 from being affected by the outer ring surface of an adjacent group of bearings 10 during the bending process and causing a flat area. The limiting groove on the second connecting ring 13 is located at the intersection of the symmetrically distributed inclined surfaces thereon. The cross-section of the upper limiting groove is arc-shaped, and the opening distance of the notch of the upper limiting groove of the second connecting ring 13 is smaller than the diameter of the circle where its cross-section is located. The shape of the cross-section of the first connecting ring 11 is divided into a rectangular part and a triangular part, wherein the triangular part on the cross-section of the first connecting ring 11 is closer to the inner wall of the adjacent second connecting ring 13 than the rectangular part, and the cross-section of the guide ring on the first connecting ring 11 is arc-shaped and located at the top angle of its triangular part, so that the guide ring on the first connecting ring 11 fits tightly with the limiting groove on the adjacent second connecting ring 13.This prevents the first connecting ring 11 from separating from the adjacent second connecting ring 13 during the deformation process, thereby ensuring the connection between the second connecting tube 12 and the five bearings 10 inside it.

[0036] like Figure 4 , Figure 5 and Fig.13 As shown, the driving assembly includes two symmetrically distributed liquid storage rings 14, which are respectively fixedly connected to the upper sides of adjacent support frames 51, and the two symmetrically distributed liquid storage rings 14 are set as a group. The interior of the liquid storage ring 14 is filled with hydraulic oil, and the connecting seat 6 passes through the adjacent liquid storage rings 14 and is rotatably connected thereto. The connecting seat 6 is fixedly connected to a movable plate 15, and the movable plate 15 slides in the adjacent liquid storage rings 14. The interior of the liquid storage ring 14 is fixedly connected to a limit plate 16, and an elastic member is fixedly connected between the limit plate 16 and the movable plate 15 located in the same liquid storage ring 14. The elastic members located on the same horizontal plane are set as a group, and the elastic member is an arc spring. All the liquid storage rings 14 are commonly connected to a hydraulic pump, and in the initial position, the connection position between the liquid storage ring 14 and the hydraulic pump is symmetrically distributed with the elastic members therein.

[0037] When the device is needed to stabilize the film bubbles blown by the film blowing machine, the staff adjusts the positions of the eight connecting plates 5 and other parts connected thereto according to the diameter of the film bubbles to be produced. The following takes the adjustment process of the left connecting plate 5 as an example, and the movement process of the other connecting plates 5 will not be described in detail:

[0038] The staff starts the driving module, and the driving module (the existing device, the specific work process will not be described in detail) drives the driving rod 4 to rotate, so that the driving rod 4 moves the adjacent connecting plate 5 to the right through the connecting module (the existing device, the specific work process will not be described in detail) thereon during the rotation process. In the process of moving to the right, the connecting plate 5 drives the four groups of support frames 51 connected thereto to move right synchronously. The four groups of support frames 51 respectively drive a group of connecting seats 6 to move synchronously, and the four groups of connecting seats 6 respectively drive other parts connected thereto to move right synchronously, changing the positions of the four guide tubes 8 and the guide layers thereon. After the staff adjusts the positions of the four guide tubes 8 and the four upper guide layers, the staff shuts down the driving module.

[0039] After the above-mentioned staff shuts down the drive module, the staff starts the hydraulic pump, and the hydraulic pump delivers hydraulic oil to the four groups of liquid storage rings 14 on the left side. The following description takes the delivery of hydraulic oil to the uppermost group of liquid storage rings 14 on the left connecting plate 5 as an example:

[0040] In the process of conveying hydraulic oil into the uppermost group of liquid storage rings 14, the uppermost group of movable plates 15 are squeezed and drive the adjacent connecting seats 6 to rotate respectively, thereby compressing and storing force on the uppermost group of elastic members, and the two uppermost connecting seats 6 transmit the rotation to the front and rear ends of the uppermost connecting rod 7 respectively, and the two connecting seats 6 respectively drive the adjacent ends of the adjacent connecting rods 7 to rotate, thereby causing the uppermost connecting rod 7 to bend due to the squeezing force, even if the middle part of the connecting rod 7 moves to the left relative to its two ends. At the same time, in the process of bending of the connecting rod 7, the distance between the front and rear ends of the connecting rod 7 gradually decreases, and then the front and rear ends of the connecting rod 7 respectively drive the adjacent connecting seats 6 to move synchronously, so that the uppermost group of connecting seats 6 are close to each other, and at the same time, the two uppermost connecting seats 6 respectively drive the adjacent support frames 51 to move synchronously, thereby reducing the squeezing force of the spring between the two uppermost support frames 51, so that the spring between the two uppermost support frames 51 is gradually relaxed.

[0041] During the bending process of the above-mentioned uppermost connecting rod 7, the connecting rod 7 drives the adjacent first connecting tube 9 to bend synchronously. During the bending process, the first connecting tube 9 drives the five bearings 10 thereon to move synchronously. The five uppermost bearings 10 respectively drive the adjacent first connecting rings 11 and the adjacent second connecting rings 13 to move synchronously. The five uppermost second connecting rings 13 jointly drive the uppermost second connecting tube 12 to bend synchronously. At the same time, the uppermost second connecting tube 12 drives the uppermost guide tube 8 to bend synchronously. During the bending process, the right side of the upper ring groove of the uppermost guide tube 8 is compressed and the left side is stretched. At the same time, the uppermost guide tube 8 drives the guide layer thereon to bend synchronously, converting the uppermost guide layer from a straight tube to an arc-shaped tube, increasing the contact area between the guide layer and the film bubble, so that the guide layer can better adapt to the shape of the film bubble, provide more uniform support, thereby reducing the shaking or fluctuation of the film bubble, and enabling the film bubble to maintain a more uniform thickness and better appearance quality during the cooling process, reducing flaws and defects.

[0042] During the bending process of the second connecting tube 12 at the uppermost side, the second connecting tube 12 at the uppermost side reacts to the five second connecting rings 13 at the uppermost side, so that the five second connecting rings 13 at the uppermost side are deformed synchronously with the bending of the second connecting tube 12 at the uppermost side, that is, the right side of the five second connecting rings 13 at the uppermost side is compressed and the left side is stretched. At the same time, during the deformation process of the second connecting ring 13, the right side of the upper limit groove of the second connecting ring 13 is stretched and the left side is compressed, that is, the right side distance of the notch of the upper limit groove of the second connecting ring 13 is increased. The distance on the left side is increased and the distance on the left side is reduced. During the deformation of the second connecting ring 13, the outer side of the guide ring on the adjacent first connecting ring 11 is always in contact with the guide groove on the second connecting ring 13, so as to avoid the occurrence of flat areas due to the influence of the five uppermost bearings 10 and other parts connected to the five bearings when the second connecting tube 12 drives the uppermost guide tube 8 to bend, thereby affecting the curvature of the uppermost guide tube 8 after bending, that is, affecting the curvature of the guide layer on the uppermost guide tube 8 after bending, so that the contact area between the guide layer on the uppermost guide tube 8 and the membrane bubble is affected.

[0043] After the staff has adjusted the curvature of the left group of guide tubes 8 according to the diameter of the film bubble to be prepared, the staff will shut down the hydraulic pump and fix the left group of guide tubes 8 in the moved position. Then the staff will start the film blowing machine and guide the film bubble blown by the film blowing machine into the fixed ring 2. Then the film bubble will move upward under the traction device. At the same time, during the movement of the film bubble, the outer side of the film bubble contacts the guide layer on the uppermost guide tube 8 and applies an upward force to the guide layer on the uppermost guide tube 8, so that the uppermost guide tube 8 drives the other parts connected thereto to rotate synchronously counterclockwise (with the film bubble moving in a clockwise direction) under the force of the film bubble. Figure 3 As a reference perspective), the uppermost guide tube 8, the uppermost first connecting tube 9, the uppermost group of first connecting rings 11, the uppermost second connecting tube 12 and the uppermost group of second connecting rings 13 continuously change the stretching and compression positions during the rotation process.

[0044] Until the film blowing machine has produced a sufficient amount of film or the film blowing machine has been used for a certain period of time, the staff shuts down the film blowing machine and starts the hydraulic pump to synchronously pump out the hydraulic oil in all the liquid storage rings 14, so that all the movable plates 15 are synchronously reset to the initial position under the action of the adjacent elastic parts, and then all the connecting rods 7 drive the other parts connected thereto to reset to the initial position synchronously, that is, all the other parts connected to the connecting rods 7 are reset from the bent state to the vertical state, and the staff inspects the other parts connected to the fixed ring 2 for subsequent continued use.

[0045] Embodiment 2: Based on embodiment 1, Figure 4-Figure 10As shown, a reduction mechanism is also included, which is arranged on the connecting rod 7. The reduction mechanism is used to reduce the rotation speed of the guide tube 8. The reduction mechanism includes a liquid storage shell 17, and the liquid storage shell 17 is filled with hydraulic oil. The liquid storage shell 17 is fixed to one end of the connecting rod 7, and the end of the connecting rod 7 close to the liquid storage shell 17 is rotatably connected to a fixed plate 18, and the fixed plate 18 is fixed to the guide tube 8 on the same connecting rod 7. During the rotation, the guide tube 8 drives the fixed plate 18 thereon to rotate synchronously, and the fixed plate 18 on the same connecting rod 7 is rotatably connected to the liquid storage shell 17, and the internal rotation of the liquid storage shell 17 is connected to a rotating plate 19, and a transmission module is arranged between the rotating plate 19 and the fixed plate 18 that are both rotatably connected to the same liquid storage shell 17. The transmission module is an existing device, and the ratchet and pawl are used as an example to show it. The ratchet is fixed to the fixed plate 18, and the pawl is rotatably connected to the rotating plate 19. When the ratchet rotates counterclockwise (with Figure 3 The pawl does not limit the ratchet wheel, and vice versa, the fixed plate 18 rotates in the reverse direction (with Figure 3 The limiting plate 20 is fixedly connected to the side of the rotating plate 19 away from the fixed plate 18, and the rotating plate 19 drives the limiting plate 20 to rotate synchronously during the rotation. The limiting plate 20 slides in the adjacent liquid storage shell 17. The limiting plate 20 is provided with a through hole. The hydraulic oil in the adjacent liquid storage shell 17 flows through the through hole during the rotation of the limiting plate 20, which is used to increase the resistance of the limiting plate 20 during the rotation. The diameter of the through hole on the limiting plate 20 in the linear array on the same connecting plate 5 gradually decreases from top to bottom, which is used to increase the resistance of the limiting plate 20 in the linear array on the same connecting plate 5 when it rotates from top to bottom.

[0046] During the above-mentioned film bubble preparation process, the film bubble moves upward, driving the eight groups of guide layers to rotate forward, and the guide layers drive the adjacent fixed plates 18 and adjacent ratchet wheels to rotate synchronously. At this time, the pawl does not limit the ratchet wheel, that is, the eight groups of guide layers do not drive the rotating plate 19 to rotate through the transmission of the ratchet and the pawl, and the rotation speed of the eight groups of guide layers is not affected.

[0047] In the process of preparing the above-mentioned film bubble, the overall height of the film bubble is relatively high, and the film bubble has not cooled to room temperature when it contacts the four guide layers. Therefore, the film bubble is easily affected by the gravitational potential energy generated by itself and falls and accumulates downward. In the process of the film bubble accumulating downward, the film bubble moves downward relative to the eight guide layers, and then the eight guide layers are all subjected to the reverse force of the film bubble and rotate in the opposite direction. The following description takes the reversal of one of the guide layers as an example:

[0048] During the reverse rotation of the guide layer, the guide layer drives the guide tube 8 therein and other parts connected thereto to rotate in the reverse direction synchronously. At the same time, during the reverse rotation of the guide tube 8, the guide tube 8 drives the fixed plate 18 thereon to rotate in the reverse direction. The fixed plate 18 drives the adjacent rotating plate 19 to rotate through the transmission of the adjacent ratchet and the adjacent pawl. The rotating plate 19 drives the flow limiting plate 20 thereon to rotate, so that the hydraulic oil in the liquid storage shell 17 flows through the through holes on the flow limiting plate 20 therein, thereby reducing the rotation speed of the flow limiting plate 20, that is, reducing the speed of the reverse rotation of the guide tube 8. At the same time, because the flow area of ​​the through holes on the linear array flow limiting plate 20 gradually decreases from top to bottom, the speed of the reverse rotation of the eight groups of guide tubes 8 gradually decreases from top to bottom, thereby buffering the membrane bubble, reducing the speed at which the membrane bubble falls downward, and thereby reducing the gravitational potential energy of the membrane bubble, thereby avoiding deformation of the membrane bubble due to downward accumulation, causing wrinkles in the subsequently produced film, and ensuring the flatness of the membrane bubble.

[0049] After the film blowing machine completes its work, the staff will reset the above parts to their original positions for subsequent use.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A stretching and smoothing device for a film blowing machine, comprising a fixed frame (1), the fixed frame (1) being fixedly connected with symmetrically distributed fixed rings (2), the symmetrically distributed fixed rings (2) being jointly fixedly connected with circumferentially uniformly distributed positioning rods (3), the symmetrically distributed fixed rings (2) being jointly rotatably connected with circumferentially uniformly distributed driving rods (4), one of the fixed rings (2) being provided with a driving module for driving the circumferentially uniformly distributed driving rods (4) to rotate, characterized in that: The invention also comprises a connection plate (5) evenly distributed in the circumferential direction, wherein the connection plate (5) is arranged on a side of the driving rod (4) close to the central axis of the fixing ring (2), the connection plate (5), the adjacent driving rod (4) and the adjacent positioning rod (3) are jointly provided with a connection module, the connection plate (5) is slidably connected to a plurality of groups of support frames (51) in a linear array close to the central axis of the fixing ring (2), each group of the support frames (51) is provided with two symmetrically distributed support frames (51), a spring is arranged between the symmetrically distributed support frames (51), and the symmetrically distributed support frames (51) are provided with a plurality of support frames (51) in a linear array. The opposite sides are rotatably connected with a connecting seat (6); the opposite sides of the two connecting seats (6) on the same group of the support frames (51) are fixedly connected with a connecting rod (7); a fixing component is provided on the connecting rod (7); a guide tube (8) is provided on the connecting rod (7) through the fixing component thereon; a guide layer is provided on the outer side of the guide tube (8); the guide tube (8) and the guide layer thereon and the connecting rod (7) are all made of elastic deformable material; the symmetrically distributed support frames (51) are jointly provided with a driving component, and the driving component is used to drive the connecting rod (7) to bend; The guide tube (8) is provided with linear array annular grooves on the inside and outside, the cross section of the annular groove on the guide tube (8) is an isosceles trapezoid, and the isosceles trapezoids of the cross sections of two adjacent annular grooves on the inside and outside of the same guide tube (8) are distributed symmetrically with respect to the center; A linear array of toothed grooves is provided on one side of the connecting rod (7) close to the central axis of the fixing ring (2); The fixing assembly comprises a first connecting tube (9), the first connecting tube (9) being fixedly connected to the connecting rod (7), the outer side of the first connecting tube (9) being detachably connected to a linear array bearing (10), the outer ring of the bearing (10) being fixedly connected to a first connecting ring (11), the outer side of the first connecting ring (11) being provided with a guide ring, the interior of the guide tube (8) being fixedly connected to a second connecting tube (12), the interior of the second connecting tube (12) being fixedly connected to a linear array second connecting ring (13), the interior of the second connecting ring (13) being provided with a limiting groove, and the guide ring on the first connecting ring (11) sliding in the limiting groove of the second connecting ring (13); The second connecting ring (13) is provided with symmetrically distributed inclined surfaces inside, and the distance between the symmetrically distributed inclined surfaces gradually increases from the middle to both sides, so as to make the second connecting ring (13) easy to bend; The limiting groove on the second connecting ring (13) is located at the intersection of the symmetrically distributed inclined surfaces thereon, the cross section of the upper limiting groove is in the shape of an arc, and the opening distance of the notch of the upper limiting groove of the second connecting ring (13) is smaller than the diameter of the circle where the cross section is located; The cross-section of the first connecting ring (11) is divided into a rectangular portion and a triangular portion, and the cross-section of the guide ring on the first connecting ring (11) is arc-shaped and located at the top corner of the triangular portion, and the guide ring on the first connecting ring (11) is tightly fitted with the limiting groove on the second connecting ring (13); The driving assembly comprises symmetrically distributed liquid storage rings (14), the symmetrically distributed liquid storage rings (14) are respectively fixedly connected to one side of an adjacent support frame (51), the connecting seat (6) passes through the adjacent liquid storage ring (14) and is rotatably connected thereto, the connecting seat (6) is fixedly connected to a movable plate (15), the movable plate (15) slides in the adjacent liquid storage ring (14), the interior of the liquid storage ring (14) is fixedly connected to a limiting plate (16), an elastic member is fixedly connected between the limiting plate (16) and the movable plate (15) located in the same liquid storage ring (14), and all the liquid storage rings (14) are commonly externally connected to a hydraulic pump.

2. A stretching and smoothing device for a film blowing machine according to claim 1, characterized in that: The invention also includes a speed reducing mechanism, which is arranged on the connecting rod (7) and is used to reduce the rotation speed of the guide tube (8). The speed reducing mechanism includes a liquid storage shell (17), the liquid storage shell (17) is fixedly connected to one end of the connecting rod (7), and the end of the connecting rod (7) close to the liquid storage shell (17) is rotatably connected to a fixing plate (18), the fixing plate (18) is fixedly connected to the guide tube (8) on the same liquid storage shell (17), and the liquid storage shell (17) is fixedly connected to the guide tube (8) on the same liquid storage shell (17). The fixed plate (18) is rotatably connected to the liquid storage shell (17); a rotating plate (19) is rotatably connected inside the liquid storage shell (17); a transmission module is provided between the rotating plate (19) and the fixed plate (18) which are both rotatably connected to the same liquid storage shell (17); a flow limiting plate (20) is fixedly connected to a side of the rotating plate (19) away from the fixed plate (18); the flow limiting plate (20) slides in an adjacent liquid storage shell (17); and a through hole is provided on the flow limiting plate (20).

3. A stretching and smoothing device for a film blowing machine according to claim 2, characterized in that: The diameters of the through holes on the linear array current limiting plates (20) on the same connecting plate (5) gradually decrease from top to bottom, and the transmission module can be selected as a ratchet pawl structure, and the transmission module is used to limit the unidirectional rotation of the rotating plate (19) and the fixed plate (18).

Images