Film roll changing and cutting mechanism
By adopting the design of swing support and swing arm structure in the film cutting mechanism, the problem of wrinkling caused by the loss of tension in the film end section is solved, and the flat rolling of the film end section and the aesthetic appearance of the film roll are achieved.
Patent Information
- Application Number
- CN202421579061.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-05
AI Technical Summary
After the film is cut, the end segment of the film is wrinkled due to the loss of tension, affecting the appearance of the film roll.
A thin film roll-changing and cutting mechanism is designed, adopting a swing support and swing arm structure, providing thrust through the swing arm cylinder, so that the pressing roller continues to press on the end section of the film after cutting, ensuring that it is flat and winding.
It effectively avoids wrinkles during the winding process of the film end section, ensuring that the surface of the film roll remains flat and beautiful.
Smart Images
Figure CN222989331U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of film production and processing equipment, and in particular relates to a film roll changing and cutting mechanism. Background Art
[0002] During the film processing and production process, a reel is needed to reel the film. After the reel reaches a certain length (that is, the film roll reaches a certain diameter), the reel is changed. Before changing the reel, a cutter is needed to cut the film horizontally. Figure 1 As shown, the cutter 21 of the film roll changing and cutting mechanism is installed on the cutter seat 22, the cutter seat 22 is installed on the electric cylinder 23, the electric cylinder 23 is installed on the swing support 2, and the electric cylinder 23 drives the cutter seat 22 and the cutter 21 to move horizontally; there is also a device for driving the swing support 2 to swing around its center line ( Figure 1 The swing support driving mechanism is a swing support driving mechanism that swings at the middle point D), and the swing support driving mechanism is usually a cylinder; in addition, a film support roller 24 for supporting the film is also installed on the swing support 2. The extension direction of the film support roller 24 is called the horizontal direction. The film support roller 24 and the cutter 21 are driven by the swing support driving mechanism to swing up and down between the working position and the standby position. In the normal winding state, the cutter 21 and the film support roller 24 leave the film 81 and are in the standby position; when cutting is required, the swing support driving mechanism drives the swing support 2 to swing upward, so that the film support roller 24 contacts the film 81 and supports the film 81 and tightens it, and the cutter 21 also comes to the working position as the swing support swings upward, and then the electric cylinder 23 drives the cutter seat 22 and the cutter 21 to move horizontally, and the blade of the cutter 21 cuts the film 81 horizontally.
[0003] However, when the film is cut by the cutter, there is still a certain length segment between the cut line and the film roll (such as Figure 1 The film 81 of the ABC section in FIG. 1 has not yet been wound onto the film roll 8. This section of film (such as Figure 1 The ABC sections in the film are called the end sections of the film. When the film is cut by the cutter, the end section of the film completely loses its tension. Therefore, when the end section of the film is rolled up, this section is usually severely wrinkled and located on the surface of the film roll, thus seriously affecting the appearance of the entire film roll. Utility Model Content
[0004] The utility model aims to overcome the above disadvantages and provide a film roll changing and cutting mechanism, which can keep the end section of the film flat after being wound onto the film roll.
[0005] Its purpose can be achieved according to the following solution: A film rewinding and cutting mechanism includes a winding shaft, the two ends of the winding shaft are installed on the winding shaft supports, and the axial direction of the winding shaft is called the transverse direction; there is also a swing support, on which an electric cylinder and a film supporting roller for supporting the film are installed, the extending direction of the film supporting roller is parallel to the winding shaft, a cutter holder is installed on the electric cylinder, and a cutter is installed on the cutter holder; there is also a swing support driving mechanism for driving the swing support to swing, and the cutter, cutter holder, electric cylinder, and film supporting roller are driven by the swing support driving mechanism to swing synchronously between the working position and the standby position; when the film supporting roller and the cutter are in the working position, the film supporting roller and the cutter are located above the front of the winding shaft; when the film supporting roller and the cutter are in the standby position, the film supporting roller and the cutter are located below the front of the winding shaft; its main feature is that there are also two left and right swing arms installed on the swing support, and a pressure roller is installed between the swinging ends of the two left and right swing arms; there is also a swing arm cylinder installed on the swing support for applying a thrust to the swing arms; the two left and right swing arms, the pressure roller, and the swing arm cylinder swing along with the swing support; when the film supporting roller and the cutter are in the working position, the pressure roller is located in front of the winding shaft and below the center line of the swing axis of the swing arm, and the swing arm cylinder is located in front of the swing arm; when the film supporting roller and the cutter are in the standby position, the pressure roller is located below the front of the winding shaft.
[0006] There is also a friction roller beside the winding shaft, the axial direction of the friction roller is parallel to the axial direction of the winding shaft; the center axis of the friction roller overlaps with the center line of the swing axis of the swing support; the position of the center axis of the friction roller and the center line of the swing axis of the swing support is fixed; there is also a longitudinal guide rail, the winding shaft support can be longitudinally slidably installed on the longitudinal guide rail, and there is also a longitudinal cylinder for driving the winding shaft support to slide along the longitudinal guide rail.
[0007] The utility model has the following advantages and effects:
[0008] First, when the cutter cuts the film, the film supporting roller and the cutter are in the working position, the pressure roller comes to the front of the winding shaft along with the swing support, the swing arm cylinder is located in front of the swing arm, and the swing arm cylinder applies a backward thrust to the two left and right swing arms, so that the pressure roller presses on the surface of the film roll; during the process of winding the end section of the film onto the film roll after the film is cut, the thrust of the swing arm cylinder makes the pressure roller always press on the winding point (i.e., the intersection point of the film roll and the end section of the film), so that the end section of the film can be smoothed and compacted during the winding process, and further, the end section of the film can remain flat after being wound onto the film roll, avoiding wrinkles and being beneficial to keeping the appearance of the film roll beautiful.
[0009] Second, during the normal winding process, the film supporting roller and the cutter are kept in the standby position, the film supporting roller and the cutter are located below the front of the winding shaft, the pressure roller comes to the front lower part of the winding shaft along with the swing support, and the pressure roller avoids the film roll and does not press on the surface of the film roll, so as to avoid the pressure roller affecting the normal rotation of the film roll during the normal winding process. Description of the Drawings
[0010] Figure 1 It is a schematic diagram of the state when the thin film is cut by a cutting knife in the traditional structure.
[0011] Figure 2 It is a schematic diagram of the overall structure and working state when the film support roller and the cutting knife of the specific embodiment of the present invention are in the standby position.
[0012] Figure 3 It is a schematic diagram of the state when the film support roller and the cutting knife of the specific embodiment of the present invention are in the working position and the cutting knife cuts the thin film. Specific Embodiment
[0013] Figure 2 、 Figure 3 A film rewinding and cutting mechanism as shown includes a winding shaft 11, both ends of the winding shaft 11 are installed on the winding shaft support 1, and a winding motor for assisting in driving the rotation of the winding shaft 11 is also installed on the winding shaft support 1. The axial direction of the winding shaft 11 is called the transverse direction; there is also a swing support 2, an electric cylinder 23 and a film support roller 24 for supporting the thin film are installed on the swing support 2. The extending direction of the film support roller 24 is parallel to the winding shaft 11. A cutting knife seat 22 is installed on the electric cylinder 23, and a cutting knife 21 is installed on the cutting knife seat 22; there is also a swing support driving cylinder 20 for driving the swing of the swing support 2. The cutting knife 21, the cutting knife seat 22, the electric cylinder 23, and the film support roller 24 are driven by the swing support driving cylinder 20 to swing synchronously between the working position and the standby position; there are also two left and right swing arms 3 installed on the swing support 2, and a pressure roller 5 is installed between the swing ends of the two left and right swing arms 3; a swing arm cylinder 4 for applying a thrust to the swing arm 3 is also installed on the swing support 2; the two left and right swing arms 3, the pressure roller 5, and the swing arm cylinder 4 swing along with the swing support 2; there is also a friction roller 6 beside the winding shaft 11, and the axial direction of the friction roller 6 is parallel to the axial direction of the winding shaft 11; the central axis of the friction roller 6 ( Figure 2 、shown as point D in Figure 3 Figure 2 、 Figure 3 also shown as point D in Figure 3 coincides with the swing axis center line of the swing support 2 ( Figure 2 shown as point D in
[0014] The working principle of the above embodiments is as follows:
[0015] In the normal winding state, the film roll 8 abuts against the friction roller 6. The swing support driving cylinder 20 drives the swing support 2 to the standby position. The film supporting roller 24 and the cutter 21 are also in the standby position. The film supporting roller 24, the pressure roller 5 and the cutter 21 are located in front of and below the winding shaft 11. The pressure roller 5 avoids the film roll 8 and does not press on the surface of the film roll 8. Therefore, the normal rotation of the film roll 8 is not affected during the normal winding process by the pressure roller 5.
[0016] When the film winding reaches a certain length (i.e., the film roll reaches a certain diameter), the roll change is ready to be carried out. First, the longitudinal cylinder 12 drives the winding shaft support 1 to slide backward along the longitudinal guide rail 7, so that the film roll 8 leaves the friction roller 6. Then, the swing support driving cylinder 20 drives the swing support 2 to rotate counterclockwise to the working position. The film supporting roller 24 and the cutter 21 come to the front and above the winding shaft 11. The film supporting roller 24 holds the film 81 upward. The pressure roller 5 is located in front of the winding shaft 11 and below the center line of the swing arm swing shaft 30. The swing arm cylinder 4 is located in front of the swing arm 3. The swing arm cylinder 4 applies a backward thrust to the left and right swing arms 3, so that the pressure roller 5 presses on the surface of the film roll 8, specifically at the junction of the film roll 8 and the film 81. Then, the electric cylinder 23 drives the cutter seat 22 and the cutter 21 to move horizontally, and the cutter 21 cuts off the film 81. Finally, the winding motor on the winding shaft support 1 drives the film roll 8 to continue rotating to wind up the end section of the film. During this process, the pressure roller 5 levels and compacts the end section of the film. Therefore, after the end section of the film is wound onto the film roll 8, it remains flat, avoiding wrinkles that would affect the appearance.
Claims
1. A film roll changing and cutting mechanism, comprising a winding shaft, both ends of which are mounted on a winding shaft support, the axial direction of the winding shaft being called the transverse direction; a swing support is also provided, an electric cylinder and a film support roller for supporting the film are mounted on the swing support, the extension direction of the film support roller is parallel to the winding shaft, a cutter seat is mounted on the electric cylinder, and a cutter is mounted on the cutter seat; a swing support driving mechanism for driving the swing support to swing is also provided, the cutter, the cutter seat, the electric cylinder, and the film support roller are driven by the swing support driving mechanism to swing synchronously between a working position and a standby position; when the film support roller and the cutter are in the working position, the film support roller and the cutter are located above and in front of the winding shaft; when the film support roller and the cutter are in the standby position, the film support roller and the cutter are located below and in front of the winding shaft; the characteristics are: Two left and right swing arms are also installed on the swing support, and a pressure roller is installed between the swing ends of the two swing arms; a swing arm cylinder for applying thrust to the swing arm is also installed on the swing support; the left and right swing arms, the pressure roller and the swing arm cylinder swing together with the swing support; when the film supporting roller and the cutter are in the working position, the pressure roller is located in front of the winding shaft and below the center line of the swing arm shaft, and the swing arm cylinder is located in front of the swing arm; when the film supporting roller and the cutter are in the standby position, the pressure roller is located in front of the winding shaft and below.
2. The film roll changing and cutting mechanism according to claim 1, characterized in that: A friction roller is also provided next to the winding shaft, and the axial direction of the friction roller is parallel to the axial direction of the winding shaft; the central axis of the friction roller overlaps with the central line position of the swing shaft of the swing support; the central axis of the friction roller and the central line position of the swing shaft of the swing support are fixed; a longitudinal guide rail is also provided, and the winding shaft support can be longitudinally slidably installed on the longitudinal guide rail, and a longitudinal cylinder is also provided for driving the winding shaft support to slide along the longitudinal guide rail.