Traction device of film blowing machine
By adopting a three -roller structure and the design of the second pressure roller in the traction device of the film blower, the thin film fluctuation deformation problem caused by the diameter beating of the pressure roller is solved, and the stability of the excessive film gap size and the flatness of the film.
Patent Information
- Application Number
- CN202420972027.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-07
AI Technical Summary
During the processing process of existing film blowing machines, due to the long axial length of a pair of press rollers, radial jumping and traction rate fluctuations, causing the film to fluctuate in size through the film gap, resulting in film fallback, fall and mass residual problems.
Design a traction device of a film blower, adopts a three -roller structure, increases the axial parallel and the external circumference of the secondary pressure roller and the active roller on the other side of the diaphragm. Support to avoid radial beating.
Through this design, the active roller has a radial beating problem due to a long axis and rotating, keeping the section gap distance stable size, preventing the film from falling, and avoiding wrinkles in the film.
Smart Images
Figure CN222387611U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of film blowing machines, and in particular to a traction device of a film blowing machine. Background Art
[0002] The film blowing machine is a machine that heats and melts plastic particles and then blows them into thin films. With the increasing application of various films in production and life, the film blowing machine technology has also developed rapidly. During the film blowing process, the extruder heats and melts the plastic particles, and the blower blows the air through the die head, which is controlled by the air ring to blow and cool the hot melted particles at a certain angle and direction. After cooling and forming, the particles move along the traction track to reel up, completing the film production process.
[0003] The problem with the prior art is that the film being blown is squeezed into a film through the herringbone plate mechanism inserter and a pair of pressure rollers, and then is rolled up through the guide rollers and the winding rollers. Since the film blowing machine is a relatively large device, the axial length of the pair of pressure rollers is relatively long. During the rolling of the pressure rollers, radial runout occurs, causing the film gap between the pair of pressure rollers to fluctuate and deform due to radial runout. The blown film is pulled through the pair of pressure rollers in an upward vertical direction, and the gap between the pair of pressure rollers is fixed according to the thickness of the film. When the traction rate on one side of the winding roller fluctuates, the traction and winding rate is less than the film output rate, and the film output side becomes loose, and the film that has been extruded and formed at the pair of pressure rollers loses traction temporarily. At this time, if there is radial runout in the film gap between a pair of pressure rollers, the clamping force of the extruded film will be weakened, which will cause the film that is vertically rising on one side of the herringbone plate to slip and fall. This section of film was originally pulled at one end and blown at the other end, and the whole is flat and cylindrical. Once a small section slips, wrinkles will appear on the originally flat surface of the film. When the wrinkles are restored by the rate fluctuation and passed through a pair of pressure rollers, they are compressed again, which further aggravates the traces of wrinkles and causes quality defects in the film that should have been straight.
[0004] Therefore, it is necessary to improve the design of the traction device of the film blowing machine, improve the structural design of a pair of pressure rollers, improve the clamping effect, avoid radial runout of a pair of pressure rollers, and avoid the film falling back and falling when the traction rate fluctuates, thereby preventing wrinkles from occurring during the film traction process. Summary of the invention
[0005] In order to solve the deficiencies of the above-mentioned technology, the present invention provides a traction device for a film blowing machine. The technical solution of the present invention is as follows: a traction device for a film blowing machine, comprising a frame, a traction roller group and a herringbone plate mechanism arranged on the frame, the herringbone plate mechanism comprising an inlet side and an outlet side, the traction roller group comprising an active roller arranged vertically above the outlet side, a first calendering roller, a second calendering roller, a rotation drive mechanism, and a pressing drive mechanism, the active roller being arranged between the first calendering roller and the second calendering roller, and a film gap being arranged between the active roller and the first calendering roller, the rotation drive mechanism being fixedly connected to the frame and rotatingly cooperating with the active roller, driving the active roller to rotate, driving the film to be extruded and output through the film gap, the pressing drive mechanism being fixedly connected to the frame and respectively cooperating with the first calendering roller and the second calendering roller, driving the first calendering roller and the second calendering roller to approach or move away from the active roller, the second calendering roller being parallel to the axial direction of the active roller and the outer peripheral surface being tangentially in conflict with the outer peripheral surface.
[0006] By adopting the above technical solution, the parallel arrangement structure shown in the drawings of the specification is realized through the three-roll structure and the additional auxiliary roller. The active roller is arranged between the first calendering roller and the second calendering roller, and a film-passing gap is arranged between the active roller and the first calendering roller.
[0007] As the instruction manual Figure 4 As shown (in the figure, the active roller rotates counterclockwise), the film is pulled and guided out through the film gap. When the active roller is provided with a rotation driving mechanism, the active roller keeps rotating to drive the film out.
[0008] In the traditional structure of a pair of calendering rollers, since only one side of the active roller is subjected to the resistance force of the first calendering roller, and the other side of the active roller is in a state of being helpless, and the active roller shaft is long and actively rotates, the active roller radially jumps and the size of the film gap fluctuates.
[0009] In order to overcome this technical problem, the present application provides a second calendering roller parallel to the axial direction of the active roller and tangentially in contact with the outer circumference on the other side of the active roller relative to the membrane gap. The second calendering roller and the first calendering roller are symmetrically arranged relative to the active roller, so that the active roller is supported on the other side of the membrane gap, that is, the force is balanced, thereby avoiding the fluctuating deformation phenomenon of the radial runout of the active roller.
[0010] Moreover, the design of the structure can achieve the support and limit function on both sides of the active roller to prevent radial runout without affecting the normal rotation of the active roller over the film.
[0011] At the same time, a clamping drive mechanism is respectively arranged on the first calendering roller and the second calendering roller to control the spacing distance between the first calendering roller, the second calendering roller and the active roller, that is, the extrusion thickness of the film gap can be controlled. While controlling the extrusion thickness of the film, a holding force is applied to the first calendering roller and the second calendering roller to further maintain the stability of the film gap size between the first calendering roller and the active roller, and to keep the second calendering roller and the active roller always tangentially in conflict.
[0012] Based on the present application, a detector, such as an infrared detector, can also be set on the film winding and output side to monitor whether there is slack on the film winding and output side. When the traction rate fluctuates and the film is not stretched and wound, the film displacement signal is monitored and the signal can be used to control the clamping drive mechanism to drive the first calendering roller to displace and clamp the film.
[0013] The utility model is further configured as follows: the rotary drive mechanism comprises a motor, a reducer, a coupling and a bearing seat, the bearing seat is fixedly connected to the frame, the two ends of the active roller are respectively rotationally matched with the bearing seat, and the active roller is linked with the motor and the reducer via the coupling.
[0014] Further configuration of the utility model: a group of clamping drive mechanisms are respectively arranged on the first calendering roller and the second calendering roller, and the clamping drive mechanisms include bearing parts, track parts, cylinders or electric cylinders, and the two ends of the first calendering roller or the second calendering roller are respectively rotatably matched with the bearing parts, and the track parts are fixedly arranged on the frame and are slidably matched with the bearing parts in the direction of approaching or moving away from the active roller, and the piston rod of the cylinder or the electric cylinder is connected to the bearing parts, and respectively drives the first calendering roller or the second calendering roller to approach or move away from the active roller.
[0015] The utility model is further configured as follows: the traction roller group further comprises a first guide roller, the first guide roller is rotatably matched with the frame and is arranged in parallel on the outer side of the first calendering roller away from the active roller.
[0016] The utility model is further configured as follows: the traction roller group further comprises a second guide roller, the second guide roller is rotatably matched with the frame and is arranged vertically below the first guide roller.
[0017] By adopting the above technical solution, the first and second guide rollers are provided to guide the film during the winding process.
[0018] Beneficial effects of the present invention: The present application designs an additional auxiliary calendering roller structure, and outputs a formed film through a three-roller structure by extruding it. An additionally arranged second calendering roller is used to make the axial direction parallel to the other side of the active roller relative to the film gap and the outer peripheral surface tangentially contact with it, so that both sides of the active roller are supported by force, which solves the problem of radial runout of the active roller due to the shaft length and rotation, and keeps the distance size of the film gap stable, thereby preventing the film from falling back and avoiding the problem of wrinkles in the film. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The structure of the embodiment of the present invention Figure 1 ;
[0020] Figure 2 The structure of the embodiment of the present invention Figure 2 ;
[0021] Figure 3 The structure of the embodiment of the present invention Figure 3 ;
[0022] Figure 4 The structure of the embodiment of the present invention Figure 4 ;
[0023] Figure 5 for Figure 3 Enlarged view of point A in the middle.
[0024] Among them, 1-frame, 11-film, 2-herringbone plate mechanism, 3-active roller, 4-first calendering roller, 41-first gap, 5-second calendering roller, 61-motor, 62-reducer, 63-coupling, 64-bearing seat, 71-bearing part, 72-track part, 73-cylinder, 8-first guide roller, 9-second guide roller.
[0025] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION
[0026] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.
[0027] like Figure 1-5As shown, a traction device of a film blowing machine includes a frame 1, and a traction roller group and a herringbone plate mechanism 2 arranged on the frame 1, the herringbone plate mechanism 2 includes an inlet side and an outlet side, the traction roller group includes an active roller 3, a first calendering roller 4, a second calendering roller 5, a rotation drive mechanism, and a pressing drive mechanism arranged vertically above the outlet side, the active roller 3 is arranged between the first calendering roller 4 and the second calendering roller 5, and a film gap 41 is arranged between the first calendering roller 4 and the second calendering roller 5, the rotation drive mechanism is fixedly connected to the frame 1 and rotates with the active roller 3 to drive the active roller 3 to rotate and drive the film 11 to be extruded and output through the film gap 41, the pressing drive mechanism is fixedly connected to the frame 1 and respectively cooperates with the first calendering roller 4 and the second calendering roller 5 to drive the first calendering roller 4 and the second calendering roller 5 to approach or move away from the active roller 3, and the second calendering roller 5 is axially parallel to the active roller 3 and the outer peripheral surface is tangentially in conflict with it.
[0028] The three-roll structure is designed and the auxiliary roller is added to realize the parallel arrangement structure as shown in the drawings of the specification. The active roller 3 is arranged between the first calendering roller 4 and the second calendering roller 5, and a film-passing gap 41 is set between the active roller 3 and the first calendering roller 4.
[0029] As the instruction manual Figure 4 As shown (in the figure, the active roller 3 rotates counterclockwise), the film 11 is pulled and guided out through the film gap 41. When the active roller 3 is provided with a rotation driving mechanism, the active roller 3 keeps rotating to drive the film 11 to be guided out.
[0030] In the structure of a traditional pair of calendering rollers, since only one side of the active roller 3 is subjected to the resistance force of the first calendering roller 4, and the other side of the active roller 3 is in a state of being helpless, and the active roller 3 has a long axis and actively rotates, the active roller 3 radially jumps and the size of the membrane gap 41 fluctuates.
[0031] In order to overcome this technical problem, the present application provides a second calendering roller 5 which is axially parallel to the active roller 3 and tangentially in contact with the outer circumference on the other side of the active roller 3 relative to the membrane gap 41. The second calendering roller 5 and the first calendering roller 4 are symmetrically arranged relative to the active roller, so that the active roller 3 is supported on the other side of the membrane gap 41, that is, the force is balanced, thereby avoiding the fluctuation deformation phenomenon of the radial runout of the active roller 3.
[0032] Moreover, the design of the structure can achieve the support and limit of both sides of the active roller 3 to prevent radial runout without affecting the normal rotation of the active roller 3 over the film.
[0033] At the same time, a clamping drive mechanism is respectively arranged on the first calendering roller 4 and the second calendering roller 5 to control the spacing distance between the first calendering roller 4, the second calendering roller 5 and the active roller 3, that is, the extrusion thickness of the film gap 41 can be controlled. While controlling the extrusion thickness of the film 11, a holding force is applied to the first calendering roller 4 and the second calendering roller 5 to further maintain the stability of the size of the film gap 41 between the first calendering roller 4 and the active roller 3, and to keep the second calendering roller 5 and the active roller 3 always tangentially in conflict.
[0034] Based on the present application, a detector, such as an infrared detector, can be set on the winding and output side of the film 11 to monitor whether the film 11 is relaxed on the winding and output side. When the traction rate fluctuates and the film 11 is not stretched and wound, the displacement signal of the film 11 is monitored, and the signal can be used to control the clamping drive mechanism to drive the first calendering roller 4 and the second calendering roller 5 to displace and clamp the film 11.
[0035] The rotary drive mechanism includes a motor 61, a reducer 62, a coupling 63 and a bearing seat 64. The bearing seat 64 is fixedly connected to the frame 1. The two ends of the active roller 3 are respectively rotatably matched with the bearing seat 64. The active roller 3 is linked with the motor 61 and the reducer 62 via the coupling 63.
[0036] The first calendering roller 4 and the second calendering roller 5 are each provided with a group of clamping driving mechanisms, and the clamping driving mechanisms include a bearing member 71, a track member 72, a cylinder 73 or an electric cylinder. The two ends of the first calendering roller 4 or the second calendering roller 5 are respectively rotatably matched with the bearing member 71. The track member 72 is fixedly arranged on the frame 1 and is slidably matched with the bearing member 71 in the direction of approaching or moving away from the active roller 3. The piston rod of the cylinder 73 or the electric cylinder is connected to the bearing member 71, and drives the first calendering roller 4 or the second calendering roller 5 to approach or move away from the active roller 3 respectively.
[0037] The traction roller group further includes a first guide roller 8 , which is rotatably matched with the frame 1 and is arranged in parallel on the outer side of the first calendering roller 4 away from the active roller 3 .
[0038] A further configuration of the utility model is as follows: the traction roller group further includes a second guide roller 9 , which is rotatably matched with the frame 1 and is arranged vertically below the first guide roller 8 .
[0039] The first and second guide rollers are provided to guide the film 11 during the winding process.
[0040] The present application designs an additional auxiliary calendering roller structure, which extrude and output the formed film through a three-roller structure, and utilizes an additionally arranged second calendering roller 5 to be axially parallel and tangentially in contact with the outer peripheral surface of the active roller 3 on the other side of the film gap 41, so that both sides of the active roller 3 are supported by force, thereby solving the radial runout problem of the active roller 3 due to the axial length and rotation, and maintaining the stability of the distance dimension of the film gap 41, thereby preventing the film from falling back and avoiding the problem of wrinkles in the film.
[0041] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.
Claims
1. A traction device for a film blowing machine, characterized in that: It includes a frame, a traction roller group and a herringbone plate mechanism arranged on the frame, the herringbone plate mechanism includes an inlet side and an outlet side, the traction roller group includes an active roller arranged vertically above the outlet side, a first calendering roller, a second calendering roller, a rotation drive mechanism, and a clamping drive mechanism, the active roller is arranged between the first calendering roller and the second calendering roller, and a film gap is arranged between the active roller and the first calendering roller, the rotation drive mechanism is fixedly connected to the frame and cooperates with the active roller to drive the active roller to rotate, and drive the film to be squeezed and output through the film gap, the clamping drive mechanism is fixedly connected to the frame and cooperates with the first calendering roller and the second calendering roller respectively, driving the first calendering roller and the second calendering roller to approach or move away from the active roller, and the second calendering roller is parallel to the axial direction of the active roller and the outer peripheral surface is tangential to the active roller.
2. The traction device of the film blowing machine according to claim 1, characterized in that: The rotary drive mechanism comprises a motor, a reducer, a coupling and a bearing seat. The bearing seat is fixedly connected to the frame. The two ends of the active roller are respectively rotatably matched with the bearing seat. The active roller is linked with the motor and the reducer via the coupling.
3. The traction device of the film blowing machine according to claim 1, characterized in that: The first calendering roller and the second calendering roller are each provided with a group of clamping driving mechanisms, and the clamping driving mechanisms include bearing parts, track parts, cylinders or electric cylinders. The two ends of the first calendering roller or the second calendering roller are respectively rotatably matched with the bearing parts. The track parts are fixedly arranged on the frame and are slidably matched with the bearing parts in the direction of approaching or moving away from the active roller. The piston rod of the cylinder or the electric cylinder is connected with the bearing parts, and drives the first calendering roller or the second calendering roller to approach or move away from the active roller respectively.
4. A traction device for a film blowing machine according to any one of claims 1 to 3, characterized in that: The traction roller group also includes a first guide roller, which is rotatably matched with the frame and is arranged in parallel on the outer side of the first calendering roller away from the active roller.
5. The traction device of the film blowing machine according to claim 4, characterized in that: The traction roller group also includes a second guide roller, which is rotatably matched with the frame and is arranged vertically below the first guide roller.