Optical film cutting device and cutting process

Abstract

The invention relates to the technical field of optical film cutting, and particularly discloses an optical film cutting device and a cutting technology.The cutting device comprises a supporting platform, an upper die base is installed on the supporting platform in the longitudinal direction in a sliding mode, a punching male die is fixedly connected to the bottom of the upper die base, and a punching female die is installed on the supporting platform; a defective material winding roller is rotatably installed on the supporting platform, a motor is installed on the supporting platform, one axial end of the defective material winding roller is connected with a main shaft of the motor through a magnetic coupling, the other axial end of the defective material winding roller is connected with a brake disc, an electromagnet is fixedly connected to the supporting platform, and the electromagnet is fixedly connected with the supporting platform. According to the cutting device, the cutting precision of the optical film can be guaranteed, the motor does not need to be started and stopped frequently, and the operation difficulty is low.

Description

Technical Field

[0001] The present invention relates to the technical field of optical film cutting, and in particular to an optical film cutting device and a cutting process. Background Art

[0002] Existing optical film punching machines generally have the following problems: when the blanking convex film cuts the optical film, the optical film is still transmitted between the upper mold seat and the base, so that the blanking convex film needs to cut the optical film in a moving state, which can easily cause errors in cutting and result in low cutting accuracy. Please refer to the patent document with publication number CN112917594A.

[0003] In order to solve the above problem, the patent document with publication number CN114474266B discloses another optical film cutting device, which controls the start and stop of the motor, shuts down the motor before punching the optical film, and restarts the motor after punching, so that the optical film is stationary during cutting, thus solving the problem of low cutting accuracy. However, the solution disclosed in the above patent document still has disadvantages: 1. The equipment structure is relatively complex; 2. The motor is frequently started and stopped, which is easy to be damaged. Summary of the invention

[0004] In order to solve the problems mentioned in the background technology, the first object of the present invention is to provide an optical film cutting device.

[0005] The cutting device comprises a supporting platform, a bracket is installed on the supporting platform, a lifting mechanism is installed on the bracket, an upper die seat is connected to the lifting end of the lifting mechanism, a punching punch is fixedly connected to the bottom of the upper die seat, a punching die corresponding to the punch is installed on the supporting platform, two groups of rollers are installed on the supporting platform, the punching die is arranged between the two groups of rollers, the two groups of rollers are used to make the optical film pass horizontally from above the punching die, a residual material winding roller is rotatably installed on the supporting platform at the output end of the optical film residual material, a motor is installed on the supporting platform, one axial end of the residual material winding roller is connected to the main shaft of the motor through a magnetic coupling, and the other axial end of the residual material winding roller is connected to a brake disc that can be attracted by a magnet, and an electromagnet is fixedly connected to the supporting platform. When the electromagnet is energized, the electromagnet can suck the brake disc and prevent the motor from driving the residual material winding roller to rotate through the magnetic coupling. A disbursement arm is fixedly connected to one side of the upper mold base, and a movable rod is longitudinally slidably penetrated in the disbursement arm. The top of the movable rod is connected to a limiting block, and the bottom of the movable rod is connected to a conductive sheet. An elastic member is abutted between the conductive sheet and the disbursement arm. A first conductive column and a second conductive column are installed on the support platform below the conductive sheet, the first conductive column is electrically connected to a power supply, and the second conductive column is electrically connected to the electromagnet. When the conductive sheet descends, it can contact the first conductive column and the second conductive column at the same time. When the limiting block abuts against the disbursement arm, the distance between the conductive sheet and the first conductive column and the second conductive column is smaller than the distance between the punching punch and the punching die.

[0006] Furthermore, two bearing seats are installed on the support platform at intervals at the output end of the optical film residue, and a connecting shaft is rotatably installed in each of the two bearing seats. The two connecting shafts are coaxially arranged, and the residue winding roller is detachably installed between the opposite ends of the two connecting shafts, and the opposite ends of the two connecting shafts are respectively connected to the magnetic coupling and the brake disc.

[0007] Furthermore, the brake disc is circular, the brake disc is coaxially arranged with the connecting shaft, the electromagnet has an arc-shaped adsorption surface matching the outer peripheral surface of the brake disc, and the outer peripheral surface of the brake disc is slidably connected to the adsorption surface of the electromagnet.

[0008] Furthermore, a blanking opening is provided on the support platform, and the blanking opening is arranged below the punching die.

[0009] Another object of the present invention is to provide a process for cutting an optical film using the cutting device, the process comprising the following steps:

[0010] S1: Pass the optical film between two sets of rollers and fix the end of the optical film on the residual material winding roller;

[0011] S2: Turn on the motor to rotate the residual material winding roller, and at the same time control the lifting mechanism to move the upper die seat up and down to make the punching punch contact with the punching die to punch the optical film. Before the punching punch contacts with the punching die, the conductive sheet first connects the first conductive column and the second conductive column to energize the electromagnet to fix the residual material winding roller, so that the optical film remains stationary during punching. After the punching is completed, the conductive sheet rises to disconnect the first conductive column and the second conductive column, so that the electromagnet is powered off, and the motor continues to drive the residual material winding roller to rotate, so that the optical film moves forward.

[0012] The beneficial effects of the present invention are as follows: when punching the optical film, the electromagnet can fix the residual material winding roller, so that the optical film is stationary and the cutting accuracy is ensured; the motor is connected to the residual material winding roller through a magnetic coupling, and when the residual material winding roller stops, the motor can still run, so there is no need to start and stop the motor frequently, which extends the service life of the motor and reduces the difficulty of control; the components of the entire device are easy to obtain and easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of an embodiment of the present invention;

[0014] Figure 2 It is a right side view of an embodiment of the present invention;

[0015] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0016] Figure 4 Schematic diagram of the connection between the residual material winding roller and the connecting shaft in an embodiment of the present invention.

[0017] Explanation of the accompanying figures: 1. Support platform, 11. Support foot, 12. Guide column, 13. Fixed seat, 14. Blanking port, 2. Cylinder, 3. Upper die seat, 31. Punching punch, 32. Disbursement arm, 4. Punching die, 5. Pair of rollers, 6. Residual material winding roller, 61. Connecting block, 7. Motor, 8. Magnetic coupling, 9. Brake disc, 10. Electromagnet, 110. Movable rod, 111. Limiting block, 120. Conductive sheet, 130. Elastic member, 140. First conductive column, 150. Second conductive column, 160. Bearing seat, 170. Connecting shaft, 171. Mounting groove DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the present invention.

[0019] like Figure 1-Figure 4 As shown, an optical film cutting device includes a support platform 1, which is horizontally installed on the ground through a plurality of legs 11. A bracket is installed on the support platform 1, and the bracket includes four guide columns 12 and a fixed seat 13. The four guide columns 12 are arranged in a rectangular shape, and the top of the four guide columns 12 is installed with a fixed seat 13, and a lifting mechanism is installed on the fixed seat 13. Preferably, the lifting mechanism is a cylinder 2 vertically installed on the fixed seat 13, and an upper die seat 3 is fixedly connected to the piston rod of the cylinder 2. A punching punch 31 is fixedly connected to the bottom of the upper die seat 3. The punching die 31 corresponds to the punching die 4, and a blanking port 14 is opened on the support platform 1. The blanking port 14 is arranged below the punching die 4. Two sets of rollers 5 are installed on the support platform 1. The punching die 4 is arranged between the two sets of rollers 5. The two sets of rollers 5 are used to allow the optical film to pass horizontally from above the punching die 4. A residual material winding roller 6 is rotatably installed at the front end of the support platform 1. A motor 7 is installed on the support platform 1. One axial end of the residual material winding roller 6 is connected to the main shaft of the motor 7 through a magnetic coupling 8, and the other axial end of the residual material winding roller 6 is connected to a magnet that can be adsorbed. The brake disc 9 of the upper die seat 3 is fixedly connected to an electromagnet 10 on the support platform 1. When the electromagnet 10 is energized, the electromagnet 10 can suck the brake disc 9 and prevent the motor 7 from driving the residual material winding roller 6 to rotate through the magnetic coupling 8. A disbursement arm 32 is fixedly connected to the right side of the upper die seat 3. A movable rod 110 is longitudinally slidably penetrated in the disbursement arm 32. The top of the movable rod 110 is connected to a limited block 111. The bottom of the movable rod 110 is connected to a conductive sheet 120. An elastic member 130 is a compression spring abutting against the conductive sheet 120 and the disbursement arm 32. The elastic member 130 is a compression spring. A first conductive column 140 and a second conductive column 150 are installed below the conductive sheet 120. The first conductive column 140 is electrically connected to a power source (not shown in the figure), and the second conductive column 150 is electrically connected to the electromagnet 10. When the conductive sheet 120 descends, it can contact the first conductive column 140 and the second conductive column 150 at the same time, so that the power source supplies power to the electromagnet 10, allowing the electromagnet 10 to generate magnetic force. When the limit block 111 abuts against the dispensing arm 32, the distance between the conductive sheet 120 and the first conductive column 140 and the second conductive column 150 is smaller than the distance between the punching punch 31 and the punching die 4.

[0020] When cutting optical film, follow these steps:

[0021] S1: passing the optical film between two sets of rollers 5, and fixing the end of the optical film on the residual material winding roller 6;

[0022] S2: Turn on the motor 7 to rotate the residual material winding roller 6, and at the same time control the cylinder 2 to move the upper die seat 3 up and down reciprocatingly. During the downward movement of the upper die seat 3, the punching punch 31 contacts the punching die 4 to punch the optical film. Before the punching punch 31 contacts the punching die 4, the conductive sheet 120 first connects the first conductive column 140 and the second conductive column 150, so that the electromagnet 10 is energized to fix the residual material winding roller 6, so that the optical film remains stationary during punching. After the punching is completed, the upper die seat 3 moves upward, driving the conductive sheet 120 to rise until the first conductive column 140 and the second conductive column 150 are disconnected, so that the electromagnet 10 is powered off, and the motor 7 continues to drive the residual material winding roller 6 to rotate, so that the optical film moves forward.

[0023] In this embodiment, two bearing seats 160 are installed at intervals at the front end of the support platform 1, and a connecting shaft 170 is rotatably installed in each of the two bearing seats 160. The two connecting shafts 170 are coaxially arranged, and the waste material winding roller 6 is detachably installed between the opposite ends of the two connecting shafts 170. Preferably, mounting grooves 171 are opened at the opposite ends of the two connecting shafts 170, and both ends of the roller core of the waste material winding roller 6 are fixedly connected with connecting blocks 61 matching the size of the mounting grooves 171. The two connecting blocks 61 are respectively fixed in the two mounting grooves 171 by a group of bolts and nuts, and the opposite ends of the two connecting shafts 170 are respectively connected to the magnetic coupling 8 and the brake disc 9. By adopting the above scheme, the waste material winding roller 6 is detachably designed, and the waste material winding roller 6 is replaced.

[0024] In this embodiment, the brake disc 9 is circular and is coaxially arranged with the connecting shaft 170. The electromagnet 10 has an arc-shaped adsorption surface matching the outer peripheral surface of the brake disc 9. The outer peripheral surface of the brake disc 9 is slidably connected to the adsorption surface of the electromagnet 10. The above scheme is adopted to ensure that the electromagnet 10 can effectively fix the brake disc 9.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical film cutting device, comprising a support platform (1), a bracket mounted on the support platform (1), a lifting mechanism mounted on the bracket, an upper die seat (3) connected to the lifting end of the lifting mechanism, a punching punch (31) fixedly connected to the bottom of the upper die seat (3), a punching die (4) corresponding to the punching punch (31) mounted on the support platform (1), characterized in that: Two sets of rollers (5) are installed on the support platform (1), and the punching die (4) is arranged between the two sets of rollers (5). The two sets of rollers (5) are used to allow the optical film to pass horizontally from above the punching die (4). A residual material winding roller (6) is rotatably installed at the output end of the optical film residual material on the support platform (1). A motor (7) is installed on the support platform (1), and one axial end of the residual material winding roller (6) is connected to the motor through a magnetic coupling (8). The main shaft of the machine (7) is connected, the other axial end of the scrap winding roller (6) is connected to a brake disc (9) that can be attracted by a magnet, and an electromagnet (10) is fixedly connected to the support platform (1). When the electromagnet (10) is energized, the electromagnet (10) can attract the brake disc (9) and prevent the motor (7) from driving the scrap winding roller (6) to rotate through the magnetic coupling (8). A dispensing arm (32) is fixedly connected to one side of the upper die seat (3), and the dispensing arm (3 2) a movable rod (110) is longitudinally slidably penetrated in the inner side, the top of the movable rod (110) is connected to a limit block (111), the bottom of the movable rod (110) is connected to a conductive sheet (120), an elastic member (130) is abutted between the conductive sheet (120) and the dispensing arm (32), a first conductive column (140) and a second conductive column (150) are installed on the support platform (1) below the conductive sheet (120), the first conductive column (140) and the second conductive column (150) are The power source is electrically connected, the second conductive column (150) is electrically connected to the electromagnet (10), the conductive sheet (120) can simultaneously contact the first conductive column (140) and the second conductive column (150) when descending, and when the limit block (111) abuts against the dispensing arm (32), the distance between the conductive sheet (120) and the first conductive column (140) and the second conductive column (150) is smaller than the distance between the punching punch (31) and the punching die (4).

2. The optical film cutting device according to claim 1, characterized in that: Two bearing seats (160) are installed on the support platform (1) at intervals at the output end of the optical film residue, and a connecting shaft (170) is rotatably installed in each of the two bearing seats (160). The two connecting shafts (170) are coaxially arranged, and the residue winding roller (6) is detachably installed between the opposite ends of the two connecting shafts (170). The opposite ends of the two connecting shafts (170) are respectively connected to the magnetic coupling (8) and the brake disc (9).

3. The optical film cutting device according to claim 2, characterized in that: The brake disc (9) is circular and is coaxially arranged with the connecting shaft (170). The electromagnet (10) has an arc-shaped adsorption surface matching the outer peripheral surface of the brake disc (9). The outer peripheral surface of the brake disc (9) is slidably connected to the adsorption surface of the electromagnet (10).

4. The optical film cutting device according to claim 1, characterized in that: The support platform (1) is provided with a blanking opening (14), and the blanking opening (14) is arranged below the punching die (4).

5. A process for cutting an optical film using the cutting device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: passing the optical film between two sets of rollers (5), and fixing the end of the optical film on the residual material winding roller (6); S2: Turn on the motor (7) to rotate the residual material winding roller (6), and at the same time operate the lifting mechanism to move the upper die seat (3) up and down, so that the punching punch (31) contacts the punching die (4) to punch the optical film. Before the punching punch (31) contacts the punching die (4), the conductive sheet (12) first connects the first conductive column (140) and the second conductive column (150), so that the electromagnet (10) is energized to fix the residual material winding roller (6), so that the optical film remains stationary during punching. After the punching is completed, the conductive sheet (12) rises to disconnect the first conductive column (140) and the second conductive column (150), so that the electromagnet (10) is powered off, and the motor (7) continues to drive the residual material winding roller (6) to rotate, so that the optical film moves forward.

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