Punching die capable of preventing indentation

Abstract

The utility model relates to the technical field of OCA optical cement production, in particular to an indentation-preventing punching die which comprises a base body, a coating sponge, a main air cylinder and an auxiliary air cylinder, a supporting column is arranged on the base body, a supporting main plate is fixedly installed on the supporting column, the main air cylinder capable of being switched is installed on the supporting main plate, the output end of the main air cylinder is connected with an upper punching die, and the output end of the upper punching die is connected with a lower punching die. A working table is arranged on the base body, a punching lower die is installed on the working table, and fans and compression roller frames are symmetrically arranged on an input port and an output port of the punching lower die. The optical cement is tightly sucked by the fan, so that the optical cement is firmly fixed on the punching lower die under the tight suction of the fan, the phenomenon that the optical cement is taken up by a cutter and is separated from the punching lower die is avoided, the punching efficiency of equipment is improved, and the yield of the equipment is increased; the anti-sticking agent is smeared on the punching upper dies on the main air cylinder and the auxiliary air cylinder one by one through the smearing sponge, smearing of the anti-sticking agent can be completed without shutdown, time and labor are saved, and the punching efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of OCA optical adhesive production, in particular to a punching die for preventing indentation. Background Art

[0002] OCA is a special adhesive used to bond transparent optical components. It is required to be colorless and transparent, with a light transmittance of more than 90%, good bonding strength, can be cured at room temperature or medium temperature, and has small curing shrinkage. OCA optical adhesive is one of the important raw materials for touch screens. It is a double-sided bonding tape without a base material, which is made by making optical acrylic adhesive without a base material, and then attaching a layer of release film to the upper and lower base layers.

[0003] In the process of OCA optical adhesive processing, punching is an important process, which can cut large pieces of OCA optical adhesive into specific small pieces to facilitate subsequent processing. The existing optical adhesive punching equipment is easy to be stained with adhesive when punching, causing the blade of the upper mold to move the optical adhesive when returning, causing the optical adhesive to temporarily leave the mold. When the upper mold returns to a certain height, the adhesive on the tool is separated from the optical adhesive, allowing the optical adhesive to be re-attached to the mold. However, the optical adhesive at this time is prone to tilting and wrinkling, which makes it very easy for the optical adhesive to produce indentations during punching, affecting its punching efficiency and resulting in a significant reduction in the yield rate. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and to provide a punching die with a simple structure, which can prevent indentations by keeping the optical glue always in contact with the die during the punching process, so as to solve the technical problem in the prior art that the optical glue is driven away from the die by a tool stained with glue, causing indentations in the optical glue during punching.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A punching die for preventing indentation comprises a base body, a support column is arranged on the base body, a support main board is fixedly mounted on the support column, a switchable main cylinder is mounted on the support main board, the output end of the main cylinder is connected to a punching upper die, a workbench is arranged on the base body, a punching lower die is mounted on the workbench, and fans and pressure roller frames are symmetrically arranged at the input and output ports of the punching lower die.

[0007] As a further optimization or improvement of the present solution, one end of the fan is close to the punching lower die, and the other end of the fan is close to the pressure roller frame.

[0008] As a further optimization or improvement of the present solution, an arc groove is opened on the supporting main board, and a main cylinder and a sub-cylinder are respectively installed in the arc groove, and the output end of the sub-cylinder is connected to the punching upper die, and a second motor is installed on the supporting main board, and the output shaft of the second motor is connected to the connecting rod, and the connecting rod is respectively connected to the sub-cylinder and the main cylinder, and the connecting rod is L-shaped, and a supporting sub-plate is installed on the supporting main board, and two positioning sleeves are fixedly provided on the supporting sub-plate, and a smear sponge is installed in the two positioning sleeves.

[0009] As a further optimization or improvement of the present solution, two first motors are installed at the bottom of the supporting sub-plate, and the output shafts of the two first motors are respectively connected to the smear sponges.

[0010] As a further optimization or improvement of this solution, the positioning sleeve is arranged below the punching upper die.

[0011] As a further optimization or improvement of this solution, the cross-sectional area of ​​the positioning sleeve is larger than the area of ​​the punching upper die.

[0012] Beneficial effects of the utility model:

[0013] (1) The optical glue is sucked tightly by the fan, so that the optical glue is firmly fixed on the punching die under the suction of the fan, avoiding the phenomenon that the tool carries the optical glue away from the punching die, improving the punching efficiency of the equipment and increasing the yield of the equipment.

[0014] (2) Anti-sticking agent is applied to the punching upper dies on the main cylinder and the auxiliary cylinder one by one by applying the sponge. The application of anti-sticking agent can be completed without stopping the machine, which saves time and effort and improves the punching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the fan and the pressure roller frame.

[0019] Figure 4 Schematic diagram of the bottom structure supporting the motherboard.

[0020] Figure 5 It is a structural schematic diagram of the positioning sleeve.

[0021] The following are marked in the figure: 1. base; 2. support column; 3. support main board; 4. support sub-board; 5. workbench; 6. punching lower die; 7. pressure roller frame; 8. fan; 9. main cylinder; 10. sub-cylinder; 11. second motor; 12. arc groove; 13. punching upper die; 14. first motor; 15. positioning sleeve; 16. smear sponge; 17. connecting rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 A punching die for preventing indentation comprises a base 1, a support column 2 is arranged on the base 1, a support main board 3 is fixedly mounted on the support column 2, a switchable main cylinder 9 is mounted on the support main board 3, the output end of the main cylinder 9 is connected to a punching upper die 13, a workbench 5 is arranged on the base 1, a punching lower die 6 is mounted on the workbench 5, and a fan 8 and a pressure roller frame 7 are symmetrically arranged at the input and output ports of the punching lower die 6.

[0024] The implementation principle of the utility model is as follows: when the equipment is used, the optical glue is first passed through the rollers on the pressure roller frames 7 at both ends of the punching and cutting lower die 6, and then the optical glue is spread flat on the punching and cutting lower die 6, and the main cylinder 9 is started, so that the punching and cutting upper die 13 on the main cylinder 9 punches the optical glue on the punching and cutting lower die 6, and when the punching and cutting upper die 13 contacts the optical glue, the fans 8 at both ends of the punching and cutting lower die 6 are started, and at this time, the fans 8 suck the optical glue at both ends of the punching and cutting lower die 6 tightly, and when the main cylinder 9 drives the punching and cutting upper die 13 on it to return, the optical glue is firmly fixed on the punching and cutting lower die 6 under the suction of the fans 8, and at this time, the adhesive attached to the tool on the punching and cutting upper die 13 cannot carry the optical glue away from the punching and cutting lower die 6, and when the punching and cutting upper die 13 finishes punching the first group of optical glues, the fans 8 stop, and then continue punching the next group of optical glues. The optical glue is sucked tightly by the fan 8 so that the optical glue is firmly fixed on the punching lower die 6 under the suction of the fan 8, thereby preventing the optical glue from being pulled away from the punching lower die 6 by the tool, thereby improving the punching efficiency of the equipment and increasing the yield of the equipment.

[0025] It should be noted that, during actual punching, the light film that comes with conventional OCA optical adhesive is a 50um thick PET release film. However, when the built-in PET film is used as a protective film for punching, there will be indentations on the edge of the OCA optical adhesive after punching. Therefore, most of the market chooses the bare punching process without film, but the bare punching process has relatively high requirements on the environment and process, which affects the overall yield rate. Based on this, the applicant replaces the film that comes with OCA with a 15um thick PE release film (this material has a good elongation at break) and then punches it, which can avoid the indentation phenomenon on the edge of the OCA optical adhesive, and at the same time reduce the process requirements while improving the yield rate.

[0026] See also Figure 3 One end of the fan 8 is close to the punching lower die 6, and the other end of the fan 8 is close to the pressure roller frame 7; in actual use, the pressure roller frame 7 feeds the optical glue so that the punching process can be carried out continuously, and the fan 8 is arranged between the punching lower die 6 and the pressure roller frame 7, which can increase the suction force of the fan 8 on the optical glue.

[0027] See also Figure 1-Figure 5 An arc groove 12 is provided on the supporting main board 3, in which a main cylinder 9 and a sub-cylinder 10 are respectively installed, and an output end of the sub-cylinder 10 is connected to a punching upper die 13. A second motor 11 is installed on the supporting main board 3, and an output shaft of the second motor 11 is connected to a connecting rod 17, and the connecting rod 17 is respectively connected to the sub-cylinder 10 and the main cylinder 9, and the connecting rod 17 is L-shaped. A supporting sub-plate 4 is installed on the supporting main board 3, and two positioning sleeves 15 are fixedly provided on the supporting sub-plate 4, and a smear sponge 16 is installed in the two positioning sleeves 15.

[0028] It should be noted that in actual use scenarios, in order to fundamentally solve the problem that the cutter on the punching upper die 13 is attached to the adhesive, causing the optical adhesive to separate from the punching lower die 6, it is necessary to avoid the cutter on the punching upper die 13 from being attached to the adhesive. The conventional treatment method is to spray anti-adhesives such as silicone oil on the punching upper die 13. This method requires the equipment to be shut down and then sprayed manually, which is laborious and affects the punching efficiency. Based on this, this solution applies the anti-adhesive to the punching upper die 13 on the main cylinder 9 and the auxiliary cylinder 10 one by one through the smear sponge 16, and the application of the anti-adhesive can be completed without stopping the machine.

[0029] In actual use, when it is necessary to spray anti-sticking agent on the punching upper die 13 on the main cylinder 9, start the second motor 11, the second motor 11 drives the connecting rod 17 to rotate 90 degrees, the connecting rod 17 is connected with the main cylinder 9 and the auxiliary cylinder 10, so that the auxiliary cylinder 10 rotates to the position of the main cylinder 9, the main cylinder 9 rotates to the top of the positioning sleeve 15, and then the main cylinder 9 and the auxiliary cylinder 10 are started at the same time, at this time the auxiliary cylinder 10 replaces the main cylinder 9 to punch the optical glue, the punching upper die 13 on the main cylinder 9 is inserted into the positioning sleeve 15, at this time start the first motor 14, the first The motor 14 drives the coating sponge 16 inside the positioning sleeve 15 to rotate and evenly coats the anti-sticking agent on the punching upper die 13 inside the positioning sleeve 15 (the anti-sticking agent is absorbed in the coating sponge 16). After the coating is completed, the punching upper die 13 on the main cylinder 9 is separated from the positioning sleeve 15, so that the main cylinder 9 is in a waiting state. When the punching upper die 13 on the auxiliary cylinder 10 needs to be coated with anti-sticking agent, the second motor 11 is started to return the main cylinder 9 to its original position, and the auxiliary cylinder 10 rotates to the position above the positioning sleeve 15. At this time, the anti-sticking agent is coated on the punching upper die 13 on the auxiliary cylinder 10.

[0030] See also Figure 2-Figure 4 Two first motors 14 are installed at the bottom of the supporting sub-plate 4, and the output shafts of the two first motors 14 are respectively connected to the smear sponges 16; in actual use, the two first motors 14 respectively drive the smear sponges 16 to apply anti-sticking agent to the punching upper die 13 on the main cylinder 9 and the sub-cylinder 10, thereby increasing the coating efficiency of the punching upper die 13 and achieving high coating uniformity.

[0031] See also Figure 4 , the positioning sleeve 15 is arranged below the punching upper die 13; in actual use, if it is necessary to apply anti-sticking agent to the punching upper die 13 on the main cylinder 9, the punching upper die 13 on the main cylinder 9 is rotated to the top of the positioning sleeve 15 through the second motor 11; if it is necessary to apply anti-sticking agent to the punching upper die 13 on the auxiliary cylinder 10, the punching upper die 13 on the auxiliary cylinder 10 is rotated to the top of the positioning sleeve 15 through the second motor 11.

[0032] Specifically, the cross-sectional area of ​​the positioning sleeve 15 is larger than the area of ​​the punching die 13 ; it should be noted that in order to enable the punching die 13 to smoothly enter the positioning sleeve 15 , the cross-sectional area of ​​the positioning sleeve 15 must be larger than the area of ​​the punching die 13 .

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A punching die for preventing indentation, characterized in that: It comprises a base (1), a support column (2) being arranged on the base (1), a support main board (3) being fixedly mounted on the support column (2), a switchable main cylinder (9) being mounted on the support main board (3), an output end of the main cylinder (9) being connected to a punching upper die (13), a workbench (5) being arranged on the base (1), a punching lower die (6) being mounted on the workbench (5), and a fan (8) and a pressure roller frame (7) being symmetrically arranged at the input port and the output port of the punching lower die (6).

2. A punching die for preventing indentation according to claim 1, characterized in that: One end of the fan (8) is close to the punching lower die (6), and the other end of the fan (8) is close to the pressure roller frame (7).

3. The punching die for preventing indentation according to claim 1, characterized in that: The supporting main plate (3) is provided with an arc groove (12), in which a main cylinder (9) and a sub-cylinder (10) are respectively installed, and the output end of the sub-cylinder (10) is connected to a punching upper die (13). The supporting main plate (3) is provided with a second motor (11), and the output shaft of the second motor (11) is connected to a connecting rod (17), and the connecting rod (17) is respectively connected to the sub-cylinder (10) and the main cylinder (9), and the connecting rod (17) is L-shaped. The supporting main plate (3) is provided with a supporting sub-plate (4), and two positioning sleeves (15) are fixedly provided on the supporting sub-plate (4), and a smear sponge (16) is installed in the two positioning sleeves (15).

4. A punching die for preventing indentation according to claim 3, characterized in that: Two first motors (14) are installed at the bottom of the supporting sub-plate (4), and the output shafts of the two first motors (14) are respectively connected to the smear sponges (16).

5. The punching die for preventing indentation according to claim 3, characterized in that: The positioning sleeve (15) is arranged below the punching upper die (13).

6. The punching die for preventing indentation according to claim 3, characterized in that: The cross-sectional area of ​​the positioning sleeve (15) is larger than the area of ​​the punching upper die (13).

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