Blow molding equipment for PE film production and processing method

Abstract

The invention relates to blow molding equipment for PE (polyethylene) film production and a processing method, which are applied to the field of film blowing equipment, a swing frame and two obliquely arranged roll shafts are utilized, so that the switching of worn roll shafts can be quickly realized, the possibility of shutdown adjustment is avoided, the continuity of blow molding processing is guaranteed, in addition, during blow molding processing, the production efficiency is improved, and the production cost is reduced. Cleaning brush strips can clean dust on the surfaces of the roller shafts in a rotating state, the quality in the film machining process is guaranteed, and after the positions of the abraded roller shafts are switched, the positions of the abraded roller shafts can be changed through the design of a third motor, a movable rack, a brush plate, a first motor and a friction disc; the roller shaft in the abraded state after position switching can be subjected to circumferential surface repairing treatment, subsequent continuous use can be conveniently waited, in this way, switching use of the two roller shafts can be achieved, replacement necessity is avoided, and the roller shaft can be conveniently replaced when the inclination angle of the swing frame is adjusted due to the fact that the surface thickness of the roller shaft is increased during subsequent repairing. And the electric extension rod is used for assisting the friction disc to make friction contact with the surface of the shaft piece on the surface of the roller shaft again.

Description

Technical Field

[0001] The invention relates to a blow molding device for producing a PE film, and in particular to a blow molding device for producing a PE film and a processing method thereof, which are applied in the field of blown film equipment. Background Art

[0002] PE film is a thermoplastic polymer film made by polymerization of ethylene. This film is widely used in many fields due to its excellent mechanical strength, dielectric and moisture resistance, as well as its flexibility and chemical stability at low temperatures. During the blow molding process, wear on the roller surface is a common problem, which not only affects production efficiency, but also may reduce product quality.

[0003] The specification of Chinese invention patent CN118372465A discloses an improved film blowing equipment and a film blowing process thereof. The improved film blowing equipment and the film blowing process thereof can limit and fix the roller between the front and rear mounting frames by setting a transmission part and a connector, and by controlling the transmission of the chain, it is convenient for personnel to adjust the position of each roller according to the degree of wear of the roller, so that each roller is utilized to the maximum extent, reducing economic costs, and facilitating the disassembly and replacement of each roller, avoiding the problem of increasing the workload of personnel due to overall disassembly, thereby improving the production quality of the film.

[0004] Existing blow molding equipment replaces worn rollers through a progressive exchange operation. However, during the exchange, the rollers and the film being blown need to be temporarily shut down, affecting processing efficiency. In addition, the number of replacement rollers is fixed and self-repair cannot be achieved, which limits the continued use of the rollers. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to achieve rapid replacement of worn rollers and self-repair of worn rollers during film blowing processing.

[0006] In order to solve the above problems, the present invention provides a blow molding device for producing PE film, comprising an extrusion tank for producing film, a feed hopper is installed through one side of the top of the extrusion tank, a blow molding die head is arranged on the side of the extrusion tank away from the feed hopper, and the blow molding die head is connected to the extrusion tank through a pipeline, an air cooling ring is installed on the top of the blow molding die head, a bracket is installed on the outside of the blow molding die head, two herringbone frames are symmetrically installed on the inside of the bracket, two tilted swing frames are symmetrically installed inside the herringbone frame through an axis rod, and the surfaces of the two swing frames in each herringbone frame close to each other are connected through the axis rod. A roller is rotatably connected to the shaft member, a No. 2 motor is installed on the front side of the herringbone frame, and the output end of the No. 2 motor is connected to the end of the shaft rod, a No. 3 motor is symmetrically installed on the top of the bracket, the output end of the No. 3 motor is connected to a gear, the surface of the gear is meshingly connected to a moving rack, the bottom end of the moving rack is connected to a brush plate with a cleaning sponge strip passing through the bottom, a No. 1 motor is installed on the front side of the bracket, the output end of the No. 1 motor is connected to a rotating rod, and a friction disk located on the outside of the moving rack is fixedly sleeved on the surface of the rotating rod, and the surface of the friction disk is in friction contact with the surface of the shaft member.

[0007] In the above-mentioned blow molding equipment for PE film production, the worn roller can be quickly switched and the possibility of shutdown adjustment can be avoided to ensure the continuity of the blow molding process. After the worn roller switches position, the worn roller can be subjected to circular surface repair treatment.

[0008] As a further improvement of the present application, the top of the herringbone frame is fixedly connected to the inner wall surface of the bracket through a support rod, and liquid storage frames with built-in repair paint liquid are installed on both side surfaces of the bracket. A suction pump is installed on the top of each liquid storage frame, and the input and output ends of the suction pump are respectively connected to the interior of the liquid storage frame and the brush plate through a hose.

[0009] As a further improvement of the present application, a receiving plate is installed on the inner side of the bracket, and the receiving plate is located below the roller shaft at a lower position in the swing frame.

[0010] As a further improvement of the present application, an inclination sensor connected to the signal of the second motor is installed on the surface of the shaft, and a cleaning brush strip with its tail end in contact with the surface of the roller is fixedly installed on the inner wall of the swing frame.

[0011] As a further improvement of the present application, in the initial state, the surface of the shaft inside the roller shaft near the lower end position on the inner side of the swing frame and the surface of the shaft inside the roller shaft near the upper end position on the inner side of the swing frame that are symmetrically arranged about the shaft rod are both in friction contact with the surface of the friction disk.

[0012] As a further improvement of the present application, a fiber optic spectrometer for measuring film thickness is installed above the bracket, and a blow molding auxiliary system is also included. The blow molding auxiliary system includes a filling and repair module and a switching module. The filling and repair module is connected to the No. 3 motor and the suction pump signal, and is used to repair the surface of the roller shaft on the inner side of the swing frame near the position of the No. 1 motor. The switching module is connected to the No. 2 motor and the fiber optic spectrometer signal, and is used to switch the worn roller shaft.

[0013] As another improvement of the present application, a circular groove is provided in the bracket, and the arc length of the circular groove is equal to half the circumference of the rotating rod, a support plate is installed on the front side of the bracket, an electric extension rod is installed on the top of the support plate, and the output end of the electric extension rod is connected to the surface of motor No. 1, and motor No. 1 is in sliding contact with the surface of the support plate.

[0014] As another improved supplement of the present application, an ultrasonic thickness measuring sensor is installed inside the roller shaft, and the ultrasonic thickness measuring sensor is connected to the electric extension rod and the No. 1 motor signal.

[0015] As another improvement of the present application, a processing method of a blow molding device comprises the following steps: S1, the raw material enters the extrusion tank through the feed hopper, and then is discharged to the blow molding die head through a pipeline for film blowing to obtain a film; S2, when the roller shaft used for squeezing the film in the swing frame is worn, start the second motor to drive the roller shaft in the swing frame to swing, so that the other roller shaft in the swing frame is used to squeeze the film; S3, then start the No. 3 motor to drive the moving rack to descend, and indirectly drive the cleaning sponge strip at the bottom of the brush plate to contact the surface of the roller shaft in a worn state after the position is switched; S4. Start the suction pump and motor No. 1 to drive the friction disk to rotate, and use the friction contact to rotate the shaft, thereby driving the worn roller to rotate and completing the circular repair.

[0016] To summarize, by utilizing the swing frame and two tilted rollers, the worn roller can be quickly switched. After the worn roller switches position, the worn roller can be repaired in a circular manner before being used again. This avoids the need for replacement, and when the thickness of the roller surface increases during subsequent repairs, causing the tilt angle of the swing frame to be adjusted, the electric extension rod can be used to assist the friction disk in regaining friction contact with the shaft surface of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the first implementation method of the present application; Figure 2 This is a schematic diagram of the inner structure of the bracket according to the first embodiment of the present application; Figure 3 This is a schematic diagram of the installation of the rotating rod and the friction disc of the first embodiment of the present application; Figure 4 It is a schematic diagram of the surface contact state of the friction disk and the shaft member of the roller surface in two different states according to the first embodiment of the present application; Figure 5 This is a schematic diagram of the installation of the moving rack and the suction pump of the first embodiment of the present application; Figure 6 This is a schematic diagram of the roller switching state of the first embodiment of the present application; Figure 7 For this application Figure 6 A is an enlarged schematic diagram; Figure 8 This is a schematic diagram of the working state of the brush plate of the first embodiment of the present application; Fig. 9 This is a schematic diagram of the installation of an electric extension pole according to the second embodiment of the present application; Fig.10 This is a schematic diagram of the state of the surface of the shaft member where the friction disk of the second embodiment of the present application moves close to the roller shaft surface after the thickness is increased.

[0018] Description of the numbers in the figure: 1. Extrusion tank; 2. Feed hopper; 3. Blow molding die head; 4. Air cooling ring; 5. No. 1 motor; 6. Liquid storage frame; 7. No. 2 motor; 8. No. 3 motor; 9. Moving rack; 10. Brush plate; 11. Herringbone frame; 12. Roller; 13. Suction pump; 14. Rotating rod; 15. Friction disk; 16. Receiver disk; 17. Swinging frame; 18. Cleaning brush strip; 19. Electric extension rod; 001. Bracket. DETAILED DESCRIPTION

[0019] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1-3 and Figure 5A blow molding device for producing PE film is shown, comprising an extrusion tank 1 for producing film, a feed hopper 2 is installed through one side of the top of the extrusion tank 1, a blow molding die head 3 is arranged on the side of the extrusion tank 1 away from the feed hopper 2, and the blow molding die head 3 is connected to the extrusion tank 1 through a pipeline, an air cooling ring 4 is installed on the top of the blow molding die head 3, a bracket 001 is installed on the outside of the blow molding die head 3, two herringbone frames 11 are symmetrically installed on the inside of the bracket 001, two tilted swing frames 17 are symmetrically installed inside the herringbone frame 11 through an axis rod, and the surfaces of the two swing frames 17 in each herringbone frame 11 that are close to each other are rotatably connected through an axis member There is a roller shaft 12, and a No. 2 motor 7 is installed on the front of the herringbone frame 11, and the output end of the No. 2 motor 7 is connected to the end of the shaft rod, and a No. 3 motor 8 is symmetrically installed on the top of the bracket 001, and the output end of the No. 3 motor 8 is connected to a gear, and the surface of the gear is meshingly connected with a moving rack 9, and the bottom end of the moving rack 9 is connected to a brush plate 10 with a cleaning sponge strip passing through the bottom, and a No. 1 motor 5 is installed on the front of the bracket 001, and the output end of the No. 1 motor 5 is connected to a rotating rod 14, and the surface of the rotating rod 14 is fixedly sleeved with a friction disk 15 located on the outside of the moving rack 9, and the surface of the friction disk 15 is in friction contact with the surface of the shaft.

[0021] Figure 4 It is shown that in the initial state, the surface of the shaft part inside the roller shaft 12 near the lower end position on the inner side of the swing frame 17 and the surface of the shaft part inside the roller shaft 12 near the upper end position on the inner side of the swing frame 17 that are symmetrically arranged about the shaft rod are both in friction contact with the surface of the friction disk 15.

[0022] Specifically, during the blow molding process, the film processing raw material enters the extrusion tank 1 through the feed hopper 2, and is subsequently discharged to the blow molding die head 3 through the extrusion tank 1 (a spiral extrusion rod is installed in the extrusion tank 1, which is the prior art and is not shown in the figure), and then the film is blown out, and the blown film passes through the extrusion limiter between the two rollers 12. When the film continues to rise and passes through the middle of the rollers 12, the friction drives the rollers 12 in contact with the film to rotate, and then the blown film is rolled up by the traction equipment; When the film passes through the middle of the roller 12, it will rub against the surface of the roller 12, and then the surface of the roller 12 will be worn after long-term use. At this time, the thickness of the film becomes abnormal. At this time, the second motor 7 rotates, so that the swing frame 17 after rotation switching has the same and symmetrical inclination as the initial state, so that the other roller 12 in the swing frame 17 can quickly squeeze and contact with the surface of the film, which can realize the rapid switching of the roller 12 and avoid the shutdown adjustment, thereby ensuring the continuity of the film blowing process (such as Figure 6 shown); In this application, Figure 8As shown, taking the roller 12 that is initially in contact with the film at the top as an example, when the other roller 12 (that is, the lower roller 12) is switched to be in contact with the film, the upper roller 12 moves to the bottom of the brush plate 10, and the No. 3 motor 8 is started, driving the gear to rotate, thereby driving the moving rack 9 and the bottom brush plate 10 to move downward, until the cleaning sponge strip at the bottom of the brush plate 10 contacts the surface of the upper roller 12, the No. 3 motor 8 stops rotating, and then the suction pump 13 and the No. 1 motor 5 are started, and the suction pump 13 is started The repair paint liquid in the liquid storage frame 6 can be transported to the brush plate 10, and the surface of the upper roller 12 can be repaired by a cleaning sponge strip that passes through the brush plate 10 (the wear on the surface of the upper roller 12 is filled and repaired by painting). At the same time, the No. 1 motor 5 drives the rotating rod 14 and the friction disk 15 on the surface to rotate. Since the friction disk 15 and the surface of the shaft connected to the upper roller 12 after the switching position are in friction contact, the friction disk 15 can drive the upper roller 12 to rotate when it rotates, thereby realizing a circular repair and filling process.

[0023] The top of the herringbone frame 11 is fixedly connected to the inner wall surface of the bracket 001 through a support rod, and the side surfaces of both sides of the bracket 001 are installed with a liquid storage frame 6 with built-in repair paint liquid. A suction pump 13 is installed on the top of each liquid storage frame 6, and the input end and output end of the suction pump 13 are respectively connected to the inside of the liquid storage frame 6 and the brush plate 10 through a hose.

[0024] A receiving plate 16 is installed on the inner side of the bracket 001 , and the receiving plate 16 is located below the roller shaft 12 at the lower position in the swing frame 17 .

[0025] Specifically, the receiving pan 16 is used to receive the excess repair paint liquid dripping during the repair and filling process of the roller shaft 12 .

[0026] Figure 7 As shown, a tilt sensor connected to the signal of the second motor 7 is installed on the surface of the shaft, and a cleaning brush strip 18 with its tail end in contact with the surface of the roller shaft 12 is fixedly installed on the inner wall of the swing frame 17.

[0027] Specifically, the inclination sensor (not shown) is used to monitor the rotation amplitude of the second motor 7, and then control the degree of proximity between the two rollers 12 on the same horizontal line to meet the processing requirements of films with different thicknesses.

[0028] When the roller 12 rotates, it contacts the cleaning brush strip 18, which can clean the surface of the roller 12 and prevent dust from affecting the processing quality of the film.

[0029] A fiber optic spectrometer for measuring film thickness is installed above the bracket 001, which also includes a blow molding auxiliary system. The blow molding auxiliary system includes a filling and repair module and a switching module. The filling and repair module is connected to the signal of the No. 3 motor 8 and the suction pump 13, and is used to repair the surface of the roller 12 on the inner side of the swing frame 17 near the position of the No. 1 motor 5. The switching module is connected to the signal of the No. 2 motor 7 and the fiber optic spectrometer, and is used to switch the worn roller 12.

[0030] Specifically, the optical fiber spectrometer is a prior art and will not be described in detail. It is not shown in the present application and is mainly used to detect whether the film thickness is abnormal.

[0031] The second implementation method: Fig. 9 It is shown that a circular groove is provided in the bracket 001, and the arc length of the circular groove is equal to half the circumference of the rotating rod 14. A support plate is installed on the front of the bracket 001, and an electric extension rod 19 is installed on the top of the support plate. The output end of the electric extension rod 19 is connected to the surface of the No. 1 motor 5, and the No. 1 motor 5 is in sliding contact with the surface of the support plate.

[0032] An ultrasonic thickness measuring sensor is installed inside the roller shaft 12 , and the ultrasonic thickness measuring sensor is connected to the electric extension rod 19 and the No. 1 motor 5 by signal.

[0033] Fig.10 It is shown that, different from the first embodiment, this embodiment mainly aims at the increase in thickness of the roller 12 surface after multiple repairs in the first embodiment. At this time, in order to achieve the same extrusion contact effect in the initial state, the swing angle of the swing frame 17 is reduced, which will drive the roller 12 closer to the direction of the herringbone frame 11, thereby destroying the contact state between the friction plate 15 and the shaft.

[0034] Specifically, in order to improve the above phenomenon, during the repair process, an ultrasonic thickness sensor can be used to detect whether the thickness of the repair paint liquid on the surface of the roller 12 exceeds the initial state (assuming that the initial thickness of the roller 12 is R, and the thickness increases to R1 after repair, and R1 is greater than R, that is, the inclination of the swing frame 17 needs to be adjusted). At this time, based on the difference between R and R1, the horizontal displacement of the roller 12 caused by the adjustment of the inclination of the swing frame 17 is calculated, and then the displacement data is sent to the electric extension rod 19, and the electric extension rod 19 is used to push the No. 1 motor 5 and the friction disk 15 (because the contact part of the rotating rod 14 and the bracket 001 is half, it will not interfere with the departure and return movement of the rotating rod 14) to displace, so that the friction disk 15 is in friction contact with the shaft on the surface of the roller 12 again.

[0035] In this embodiment, the thickness of the surface repair of the upper and lower rollers 12 is kept consistent, so as to ensure that the friction disk 15 can maintain an effective friction contact state with any one of the two rollers 12 when the electric extension rod 19 moves subsequently.

[0036] The third implementation method: A method for processing a blow molding device comprises the following steps: S1, the raw material enters the extrusion tank 1 through the feed hopper 2, and then is discharged to the blow molding die 3 through a pipeline for film blowing to obtain a film; S2, when the roller 12 for squeezing the film in the swing frame 17 is worn, start the second motor 7 to drive the roller 12 in the swing frame 17 to swing, so that the other roller 12 in the swing frame 17 is used to squeeze the film; S3, then start the third motor 8, drive the moving rack 9 to descend, and indirectly drive the cleaning sponge strip at the bottom of the brush plate 10 to contact the surface of the roller shaft 12 in a worn state after the position is switched; S4, start the suction pump 13 and the first motor 5, drive the friction disk 15 to rotate, and use the friction contact to make the shaft rotate, thereby driving the worn roller 12 to rotate, completing the circular repair.

[0037] In summary, the present application utilizes the swing frame 17 and two tilted rollers 12 to quickly realize the switching of worn rollers 12 and avoid the possibility of shutdown adjustment, thereby ensuring the continuity of the blow molding process. In addition, during the blow molding process, the cleaning brush strip 18 can clean the dust on the surface of the rotating roller 12 to ensure the quality of the film processing process. After the worn roller 12 switches its position, the design of the No. 3 motor 8, the moving rack 9, the brush plate 10, the No. 1 motor 5 and the friction disk 15 can be used to perform a circular surface repair treatment on the worn roller 12 after switching its position, so as to facilitate waiting for subsequent continued use. In this way, the switching use of the two rollers 12 can be realized, avoiding the need for replacement, and when the surface thickness of the roller 12 increases during subsequent repairs, resulting in the adjustment of the tilt angle of the swing frame 17, the electric extension rod 19 can be used to assist the friction disk 15 to regain friction contact with the shaft surface of the roller 12.

[0038] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A blow molding device for producing PE film, comprising an extrusion tank (1) for producing film, a feed hopper (2) being installed through one side of the top of the extrusion tank (1), a blow molding die head (3) being arranged on the side of the extrusion tank (1) away from the feed hopper (2), and the blow molding die head (3) being connected to the extrusion tank (1) through a pipeline, an air cooling ring (4) being installed on the top of the blow molding die head (3), and a bracket (001) being installed on the outer side of the blow molding die head (3), characterized in that: Two herringbone frames (11) are symmetrically mounted on the inner side of the bracket (001); two tilted swing frames (17) are symmetrically mounted inside the herringbone frames (11) via shafts; surfaces of the two swing frames (17) in each herringbone frame (11) that are close to each other are rotatably connected to a roller shaft (12) via shafts; a No. 2 motor (7) is mounted on the front side of the herringbone frame (11); and an output end of the No. 2 motor (7) is connected to an end of the shaft; a No. 3 motor (8) is symmetrically mounted on the top of the bracket (001); The output end of the No. 3 motor (8) is connected to a gear, the surface of the gear is meshingly connected to a movable rack (9), the bottom end of the movable rack (9) is connected to a brush plate (10) having a cleaning sponge strip passing through the bottom, the front of the bracket (001) is mounted with the No. 1 motor (5), the output end of the No. 1 motor (5) is connected to a rotating rod (14), and the surface of the rotating rod (14) is fixedly sleeved with a friction disk (15) located outside the movable rack (9), and the surface of the friction disk (15) is in friction contact with the surface of the shaft.

2. A PE film production blow molding device according to claim 1, characterized in that: The top end of the herringbone frame (11) is fixedly connected to the inner wall surface of the bracket (001) via a support rod, and liquid storage frames (6) with built-in repair paint liquid are installed on both side surfaces of the bracket (001). A suction pump (13) is installed on the top of each liquid storage frame (6), and the input end and output end of the suction pump (13) are respectively connected to the inside of the liquid storage frame (6) and the brush plate (10) via a hose.

3. A PE film production blow molding device according to claim 2, characterized in that: A receiving plate (16) is installed on the inner side of the bracket (001), and the receiving plate (16) is located below the roller shaft (12) at a lower position in the swing frame (17).

4. A PE film production blow molding device according to claim 3, characterized in that: The surface of the shaft is provided with an inclination sensor connected to the signal of the second motor (7), and the inner wall of the swing frame (17) is fixedly provided with a cleaning brush strip (18) whose tail end is in contact with the surface of the roller shaft (12).

5. A PE film production blow molding device according to claim 4, characterized in that: In the initial state, the surface of the shaft member in the roller shaft (12) near the lower end position on the inner side of the swing frame (17) and the surface of the shaft member in the roller shaft (12) near the upper end position on the inner side of the swing frame (17) are both in friction contact with the surface of the friction disk (15).

6. A PE film production blow molding device according to claim 5, characterized in that: An optical fiber spectrometer for measuring film thickness is installed above the bracket (001), and a blow molding auxiliary system is also included. The blow molding auxiliary system includes a filling and repairing module and a switching module. The filling and repairing module is connected to the signal of the third motor (8) and the suction pump (13) and is used to repair the surface of the roller (12) on the inner side of the swing frame (17) near the position of the first motor (5). The switching module is connected to the signal of the second motor (7) and the optical fiber spectrometer and is used to switch the worn roller (12).

7. A PE film production blow molding device according to claim 6, characterized in that: A circular groove is provided in the bracket (001), and the arc length of the circular groove is equal to half the circumference of the rotating rod (14). A support plate is installed on the front of the bracket (001), and an electric extension rod (19) is installed on the top of the support plate. The output end of the electric extension rod (19) is connected to the surface of the first motor (5), and the first motor (5) is in sliding contact with the surface of the support plate.

8. A PE film production blow molding device according to claim 7, characterized in that: An ultrasonic thickness measuring sensor is installed inside the roller shaft (12), and the ultrasonic thickness measuring sensor is connected to the electric extension rod (19) and the first motor (5) by signal.

9. A method for processing a blow molding device, using the blow molding device for producing a PE film according to claim 8, characterized in that: The following steps are involved: S1, the raw material enters the extrusion tank (1) through the feed hopper (2), and is then discharged through a pipeline to the blow molding die head (3) for film blowing to obtain a film; S2, when the roller shaft (12) for squeezing the film in the swing frame (17) is worn, the second motor (7) is started to drive the roller shaft (12) in the swing frame (17) to swing, so that the other roller shaft (12) in the swing frame (17) is used to squeeze the film; S3, then starting the third motor (8) to drive the movable rack (9) to descend, thereby indirectly driving the cleaning sponge strip at the bottom of the brush plate (10) to contact the surface of the roller shaft (12) in a worn state after the position is switched; S4, starting the suction pump (13) and the first motor (5), driving the friction disk (15) to rotate, and using the friction contact to rotate the shaft, thereby driving the worn roller (12) to rotate, completing the circular repair.

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