A cast film collection device

Abstract

This utility model discloses a cast film collection device, belonging to the technical field of cast film equipment. It includes a base, with a first rotating shaft rotatably connected to the upper part of the base. Converter wheels are connected to both sides of the first rotating shaft, and each converter wheel has circumferential internal teeth. A locking motor is connected to the upper side of the base, and a first gear meshing with the internal teeth is connected to the output end of the locking motor. Each converter wheel has two detachable and openable fixing devices connected to it. A winding roller is rotatably connected between the corresponding fixing devices on the two converter wheels. A power device capable of driving the winding roller is connected to the base. A heating wire capable of melting the cast film is connected to the corresponding position between the two converter wheels. By switching the winding roller through the converter wheels, the heating wire melts the cast film, achieving continuous collection. The cast film is neatly broken, resulting in good winding effect, avoiding waste of cast film caused by changing the winding roller, and improving production efficiency and utilization.

Description

Technical Field

[0001] This utility model belongs to the technical field of cast film equipment, specifically a cast film collection device. Background Technology

[0002] Cast film, a type of plastic film prepared through a casting process, is mainly made by heating and melting plastic raw materials in an extruder, then extruding them through a T-die. The melt is then uniformly cast onto a cooling roller under the action of gravity and airflow, and after cooling and shaping, it forms a film. Due to its excellent transparency, flatness, and uniformity, it is widely used in many fields such as packaging, electronics, medical, and hygiene products.

[0003] Existing cast film collection equipment involves placing a collection roller on a rotating mechanism, attaching double-sided tape to the collection roller, attaching the transmitted cast film to the collection roller, and the rotating mechanism driving the collection roller to collect the film. When the cast film wrapped on the collection roller reaches a certain extent, the cast film needs to be cut, the collection roller is immediately removed, and a new collection roller is installed to repeat the operation.

[0004] In the production of cast film, the production machines need to operate continuously. Once the machine stops, the flowability and integrity of the cast film will be affected, and restarting requires a significant amount of preparation time. Therefore, existing cast film collection devices can only tear out and discard the continuously produced cast film during the intervals between changing the collection rollers, resulting in serious material waste. Furthermore, manual cutting and pasting of the cast film is prone to misalignment due to operational errors, leading to uneven collection and hindering continuous and efficient collection operations. Utility Model Content

[0005] To address the problems of existing cast film collection devices, such as wasted cast film, unevenly packed bundles of collected cast film, and inability to continuously collect cast film, this invention provides a cast film collection device.

[0006] This utility model is achieved through the following technical solution:

[0007] A cast film collecting device includes a base, a first rotating shaft rotatably connected to the upper part of the base, conversion wheels connected to both sides of the first rotating shaft, the conversion wheels having circumferential internal teeth, a locking motor connected to the upper side of the base, and a first gear meshing with the internal teeth connected to the output end of the locking motor; two detachable and closable fixing devices are respectively connected to each conversion wheel, and a winding roller is rotatably connected between the corresponding fixing devices on the two conversion wheels; a power device capable of driving the winding roller to rotate is connected to the base, and an electric heating wire capable of melting the cast film is connected to the corresponding position between the two conversion wheels.

[0008] A further improvement of this utility model is that the fixing device includes a fixing seat that is connected and installed on the conversion wheel and can position and support the winding roller. A fixing cover that can constrain the winding roller is rotatably connected and installed on the inner side of the fixing seat. The fixing cover and the outer edge of the fixing seat are provided with a fixing plate that is fastened by bolts.

[0009] A further improvement of this utility model is that the power device includes a support frame connected and installed on the base. The upper and lower side walls of the support frame are provided with guide grooves. A power motor is slidably connected and installed between the two guide grooves. A spring is connected and installed between the power motor and the support frame to elastically support the power motor towards the first rotating shaft side. Second gears are connected and installed at both ends of the winding roller. A third gear that meshes with the second gear is connected and installed at the output end of the power motor.

[0010] A further improvement of this utility model is that a second rotating shaft is rotatably connected and installed on the upper part of the support frame away from the conversion wheel, and a guide roller capable of raising and rolling the cast film is connected and installed on the second rotating shaft.

[0011] A further improvement of this invention is that the guide roller is a polytetrafluoroethylene (PTFE) cylinder.

[0012] A further improvement of this invention is that the two fixed seats on the conversion wheel are arranged in a circular array, and when the winding roller is in the unloading position, the fixed cover is located on the upper side of the winding roller.

[0013] A further improvement of this invention is that the two heating wires are installed on the outer edge of the conversion wheel and between the two winding rollers.

[0014] As can be seen from the above technical solutions, the beneficial effects of this utility model are:

[0015] In use, the power unit is started to drive the winding roller to rotate, which in turn causes the produced cast film to be continuously wound onto the winding roller. When the cast film on the winding roller reaches the set amount, the locking motor is started. The locking motor drives the first gear to rotate the internal gear, which causes the conversion wheel to rotate. The winding roller fully wound with cast film is rotated downward to the other side, while the winding roller to be wound rotates upward. The winding roller to be wound has double-sided tape on it. When the winding roller to be wound rotates to contact the cast film, the taut cast film will stick to the double-sided tape. At this time, the heating wire heats up instantly, melting the cast film pressed on the heating wire. The locking motor stops working and locks the conversion wheel to stop rotating. The newly wounding roller continues to rotate and continuously wind the newly produced cast film. By switching the winding roller fully wrapped with cast film to the winding roller with cast film to be wound using a switching wheel, and then heating and melting the cast film with an electric heating wire, continuous collection of cast film is achieved. The cast film is cut neatly, resulting in good winding effect. This avoids the waste of cast film caused by replacing the winding roller, and improves production efficiency and utilization. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0019] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0020] Figure 4 This is a cross-sectional structural diagram of the present invention during operation.

[0021] In the attached diagram: 1. Base, 2. First rotating shaft, 3. Converter wheel, 4. Internal gear, 5. Locking motor, 6. First gear, 7. Fixing device, 71. Fixing seat, 72. Fixing cover, 73. Fixing plate, 74. Bolt, 8. Second gear, 9. Power unit, 91. Support frame, 92. Guide groove, 93. Power motor, 94. Spring, 95. Third gear, 10. Heating wire, 11. Winding roller, 12. Second rotating shaft, 13. Guide roller. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] like Figure 1-4As shown, a cast film collection device includes a base 1 fixed on the ground, a detachable cardboard tube fitted on a winding roller 11 for receiving the cast film, a first rotating shaft 2 rotatably connected to the upper part of the base 1, conversion wheels 3 symmetrically connected to both sides of the first rotating shaft 2, the conversion wheels 3 having circumferential internal teeth 4, a locking motor 5 connected to the upper side of the base 1, the locking motor 5 being a motor with a worm gear reduction mechanism having a locking function, a first gear 6 meshing with the internal teeth 4 connected to the output end of the locking motor 5, two opening and closing fixing devices 7 respectively connected to each conversion wheel 3, the winding roller 11 rotatably connected between the corresponding fixing devices 7 on the two conversion wheels 3; a power device 9 capable of driving the winding roller 11 to rotate connected to the base 1, and two heating wires 10 capable of melting the cast film connected at corresponding positions between the two conversion wheels 3.

[0024] In use, the power unit 9 is started to drive the winding roller 11 to rotate, so that the produced cast film is continuously wound around the winding roller 11. When the cast film wound on the winding roller 11 reaches the set amount, the locking motor 5 is started. The locking motor 5 drives the first gear 6 to drive the internal gear 4 to rotate, so that the conversion wheel 3 rotates. The winding roller 11 with the cast film wound is rotated downward to the other side, and the winding roller 11 to be wound rotates upward. Double-sided tape is attached to the winding roller 11 to be wound. When the winding roller 11 to be wound rotates to contact the cast film, the taut cast film will stick to the double-sided tape. At this time, the heating wire 10 heats up instantly, melting the cast film pressed on the heating wire 10. After the conversion wheel 3 rotates 180 degrees, the locking motor 5 stops working and locks the conversion wheel 3 to stop rotating. The newly wound winding roller 11 continues to rotate and continuously wind the newly produced cast film. The switching wheel 3 switches the winding roller 11, which is fully wrapped with cast film, to the winding roller 11, which is to be wrapped with cast film. Then, the casting film is heated and melted by the heating wire 10, so as to realize continuous collection of cast film and neat breakage of cast film, resulting in good winding effect. This avoids the waste of cast film caused by replacing the winding roller 11, and improves production efficiency and utilization.

[0025] It should be noted that the melting temperature of the cast film is around 150 degrees Celsius. The heating wire 10 can be rapidly heated to over 150 degrees Celsius after being energized, thus neatly melting the cast film. Since the heating wire 10 is in a continuous rotating process, it cannot be directly connected by an electric wire. Instead, the heating wire 10 needs to be powered by a conductive brush that makes frictional contact with the wire.

[0026] The fixing device 7 includes a fixing seat 71 connected and mounted on the conversion wheel 3, which can position and support the winding roller 11. The winding roller 11 is equipped with a damping bearing, which can stop the rotation of the winding roller 11 after the power device 9 stops driving it. The damping bearing is nested in the fixing seat 71. A fixing cover 72 that can constrain the winding roller 11 is rotatably connected to the inside of the fixing seat 71. Specifically, the fixing seat 71 is provided with a rotating shaft, and the fixing cover 72 is connected and installed with a shaft hole on the corresponding side, so that the fixing cover 72 can rotate and open around the fixing seat 71. The fixing cover 72 and the outer edge of the fixing seat 71 are provided with a fixing plate 73 fastened by bolts 74. In use, the bolts 74 are loosened to open the fixing cover 72, the winding roller 11 is placed in, and then the fixing cover 72 is closed and fixed, so that the winding roller 11 can be accurately positioned and installed on the fixing device 7 and can rotate within the fixing device 7 to wind and collect the cast film.

[0027] The power unit 9 includes a support frame 91 connected and installed on the base 1. The upper and lower side walls of the support frame 91 are provided with guide grooves 92. A power motor 93 that slides toward the center of the conversion wheel 3 is connected and installed between the two guide grooves 92. A spring 94 that elastically supports the power motor 93 toward the first rotating shaft 2 is connected and installed between the power motor 93 and the support frame 91. Second gears 8 are connected and installed at both ends of the winding roller 11. A third gear 95 that meshes with the second gear 8 is connected and installed at the output end of the power motor 93. In use, the power motor 93 is started, which drives the second gear 8 and the third gear 95 to mesh, causing the winding roller 11 to rotate to collect the cast film. When it is necessary to replace the fully wound winding roller 11, the conversion wheel 3 drives the winding roller 11 to rotate. The sliding power motor 93 enables the second gear 8 and the third gear 95 to mesh more smoothly, and the spring 94 enables the power motor 93 to press against the support frame 91 on the side away from the spring 94 after the second gear 8 and the third gear 95 mesh, so that the second gear 8 and the third gear 95 mesh stably.

[0028] A second rotating shaft 12 is rotatably connected to the upper part of the support frame 91 on the side away from the conversion wheel 3. A guide roller 13 is connected to the second rotating shaft 12 to support and lift the cast film. The guide roller 13 lifts the cast film so that it is higher than the winding roller 11 that collects the cast film. This allows the cast film to be taut and ensures that the cast film has a large wrapping angle on the winding roller 11 when it is first attached, which is beneficial for the adhesion of the cast film to the double-sided adhesive on the winding roller 11.

[0029] The guide roller 13 is made of polytetrafluoroethylene (PTFE). PTFE has good lubricity, which can prevent the cast film from being damaged or deformed by friction on the guide roller 13, thereby improving the collection quality of the cast film.

[0030] The two fixed seats 71 on the conversion wheel 3 are arranged in a circumferential array. When the winding roller 11 is in the unloading position, the fixed cover 72 is positioned above the winding roller 11. When the winding roller 11 is removed, the fixed cover 72 can be opened to remove the winding roller 11 from above, which facilitates the removal of the winding roller 11 wrapped with cast film using hoisting equipment, saves manpower, facilitates the installation of the winding roller 11, and improves work efficiency.

[0031] The two heating wires 10 are installed on the outer edge of the conversion wheel 3 and in the middle of the two winding rollers 11. This allows the heating wires 10 to have sufficient heating time, and their central position helps to tighten the cast film, making the melting and breaking of the cast film smoother.

[0032] In use, the winding roller 11 is placed in the fixed base 71, and the fixed cover 72 is pressed onto the damping bearing of the winding roller 11 by bolts 74. The cardboard tube fixed on the winding roller 11 is covered with double-sided tape. The locking motor 5 rotates, driving the conversion wheel 3 to rotate, which in turn drives the winding roller 11 to rotate upward. When it rotates to contact the cast film, the cast film will be adhered to the double-sided tape under the action of the guide roller 13. Due to the pulling of the winding roller 11, which is also wrapped with cast film on the other side, the cast film will adhere to the heating wire 10. The heating wire 10 is energized and heats up to melt the cast film. The power motor 93 then drives the winding roller 11 to rotate, starting to wind and collect the cast film. This device can achieve continuous collection of cast film, avoiding the waste of cast film caused by replacing the winding roller 11, improving product utilization and reducing costs.

[0033] It should be noted that the gear meshing and sliding parts need to be lubricated regularly to reduce wear on the parts. The base 1 needs to be fixedly installed on the ground or have a low center of gravity to prevent the risk of the base 1 tipping over during use.

[0034] Both the locking motor 5 and the power motor 93 are servo motors and are electrically connected to the controller. The controller can be a common PLC controller, such as the Siemens S7-200+ series. The collection of the cast film can be continuously and automatically controlled by setting the program. Only manual handling is required to pick up and put down the winding roller 11 and apply double-sided tape.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cast film collection device, comprising a base (1), characterized in that, A first rotating shaft (2) is rotatably connected to the upper part of the base (1). A conversion wheel (3) is connected to both sides of the first rotating shaft (2). The conversion wheel (3) is provided with a circumferential internal tooth (4). A locking motor (5) is connected to the upper side of the base (1). A first gear (6) that meshes with the internal tooth (4) is connected to the output end of the locking motor (5). Two fixing devices (7) that can be detached and opened are connected to each conversion wheel (3). A winding roller (11) is rotatably connected between the corresponding fixing devices (7) on the two conversion wheels (3). A power device (9) that can drive the winding roller (11) to rotate is connected to the base (1). A heating wire (10) that can melt the cast film is connected to the corresponding position between the two conversion wheels (3).

2. The cast film collecting device according to claim 1, characterized in that, The fixing device (7) includes a fixing seat (71) that is connected to the conversion wheel (3) and can position and support the winding roller (11). The fixing seat (71) is rotatably connected to a fixing cover (72) that can constrain the winding roller (11). The fixing cover (72) and the outer edge of the fixing seat (71) are provided with a fixing plate (73) fastened by bolts (74).

3. The cast film collecting device according to claim 2, characterized in that, The power unit (9) includes a support frame (91) connected and installed on the base (1). The upper and lower side walls of the support frame (91) are provided with guide grooves (92). A power motor (93) is slidably connected between the two guide grooves (92). A spring (94) is connected between the power motor (93) and the support frame (91) to provide elastic support for the power motor (93) towards the first rotating shaft (2). A second gear (8) is connected and installed at both ends of the winding roller (11). A third gear (95) that meshes with the second gear (8) is connected and installed at the output end of the power motor (93).

4. The cast film collecting device according to claim 3, characterized in that, A second rotating shaft (12) is rotatably connected to the upper part of the support frame (91) away from the conversion wheel (3), and a guide roller (13) capable of lifting and rolling the cast film is connected to the second rotating shaft (12).

5. The cast film collecting device according to claim 4, characterized in that, The guide roller (13) is a polytetrafluoroethylene cylinder.

6. The cast film collecting device according to claim 2, characterized in that, The two fixed seats (71) on the conversion wheel (3) are arranged in a circular array; when the winding roller (11) is in the unloading position, the fixed cover (72) is on the upper side of the winding roller (11).

7. The cast film collecting device according to claim 1, characterized in that, The two heating wires (10) are installed on the outer edge of the conversion wheel (3) and between the two winding rollers (11).

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