Back adhesive preparation device and preparation process

Abstract

The invention relates to the technical field of blanking, and discloses a gum preparation device which comprises a lower die and an upper die driven by a servo air cylinder to move up and down in a reciprocating mode, the lower die comprises a lower barrel with a receding hole formed in the top, a cylinder body is fixedly arranged in the lower barrel, a supporting column used for supporting gum is arranged in the cylinder body in an elastic dynamic sealing mode, and the supporting column is arranged in the lower barrel. The top of the supporting column penetrates through the receding hole and then abuts against the bottom of the back glue, and an air hole is formed in the cylinder body so that the sliding speed of the supporting column can be reduced. By improving the structures of the upper die and the lower die, supporting columns in the lower die are used for supporting the bottom of gum, and first pressure springs in the upper die are used for clamping and fixing the gum, so that the gum can be effectively supported during blanking, and the problem that the size and the shape of a finished product are deviated is not easily caused; and meanwhile, a finished product is creatively prevented from being blocked by the supporting column and falling above the lower die, so that the aims of continuously blanking and conveniently collecting the blanked finished product can be fulfilled.

Description

Technical Field

[0001] The invention relates to the field of punching technology, and in particular to a back glue preparation device and a preparation process. Background Art

[0002] Adhesive stickers are sticky stickers that are widely used in products such as mobile phones, cameras, buckles, etc. For example, during the production process of the adhesive stickers on the back of the buckles, it is necessary to punch out a single finished product of the corresponding shape according to the shape of the product.

[0003] In the prior art, a single finished product with adhesive backing is obtained by die cutting and blanking, that is, an upper die that can move back and forth up and down cooperates with a fixed lower die, and a ring-shaped blanking tool is installed on the upper die. The upper die drives the blanking tool toward the lower die to blank the adhesive backing to obtain a single finished product. In order to achieve continuous blanking and facilitate the collection of the finished products punched out, an avoidance hole is opened in the lower die in the prior art, so that the finished products punched out can fall into the avoidance hole for collection, and will not remain on the lower die to affect continuous blanking.

[0004] However, the inventors found in the actual production process that there are at least the following drawbacks in the prior art: in order to achieve continuous punching and facilitate the collection of the finished products after punching, an avoidance hole is opened on the lower die in the prior art. However, since the back glue is soft and easy to deform, its own support is poor. The existence of the avoidance hole makes the bottom of the back glue have no support during punching. When the punching tool punches downward, especially when the punching tool is not sharp enough or the tension of the back glue is not enough, the punching tool will produce a downward squeezing force on the back glue, causing the back glue to deform downward, which can easily lead to deviations in the size and shape of the punched finished product. If the bottom support of the back glue is added, the punched finished product will be blocked and unable to fall. The finished product can only fall on the lower die, making it difficult to achieve the purpose of continuous punching and facilitating the collection of the finished products after punching. Therefore, how to add support to the back glue so that the back glue is not easy to produce deviations in the size and shape of the finished product during punching, and how to make the punched finished product not blocked and automatically fall and collect to achieve the purpose of continuous punching and facilitating the collection of the finished product after punching is a technical problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a back adhesive preparation device and a preparation process to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a back glue preparation device, comprising a lower mold and an upper mold driven by a servo cylinder to reciprocate up and down, the lower mold comprising a lower cylinder with an avoidance hole on the top, a cylinder body fixedly arranged in the lower cylinder, a support column for supporting the back glue being elastically sealed in the cylinder body, the top of the support column passing through the avoidance hole and abutting against the bottom of the back glue, and an air hole being arranged on the cylinder body to reduce the sliding speed of the support column;

[0007] The lower mold also includes a toggle mechanism disposed in the lower cylinder and linked to the support column;

[0008] The upper die comprises an upper cylinder fixedly connected to the power output shaft of the servo cylinder, an extrusion block coaxial with the support column is elastically slidably arranged in the upper cylinder, a ring knife is coaxially arranged at the bottom of the upper cylinder, and the bottom of the extrusion block penetrates the ring knife and extends to the bottom of the ring knife;

[0009] When the upper mold moves downward, the extrusion block presses the backing glue and then elastically moves upward so that the ring knife punches out the finished product from the backing glue. Then the extrusion block pushes the support column to elastically slide down so that the finished product enters the lower cylinder. When the upper mold moves upward, its speed is greater than the upward speed of the support column so that the extrusion block is separated from the finished product, and the process of the support column moving upward drives the toggle mechanism to detach the finished product from the support column.

[0010] The above-mentioned adhesive backing preparation device, the toggle mechanism includes an upper rotating roller and a lower rotating roller arranged in the lower cylinder, the upper rotating roller is elastically rotatable, the outer peripheral surface of the upper rotating roller is provided with an elastic plastic brush, the plastic brush is elastically abutted against the outer peripheral surface of the support column, the support column is provided with two symmetrically arranged fixing ears, the two fixing ears are each fixedly connected to the upper rotating roller by a pull rope, the pull rope passes around the bottom of the lower rotating roller, and during the upward movement of the support column, the upper rotating roller is pulled counterclockwise by the pull rope to allow the plastic brush to toggle the finished product on the support column to move.

[0011] In the above-mentioned adhesive backing preparation device, the diameter of the support column is not larger than the diameter of the extrusion block, and a gap is formed between the inner wall of the ring knife and the outer side surface of the extrusion block so that the outer edge of the finished product punched out by the ring knife is located outside the support column, thereby facilitating the plastic brush to move the finished product.

[0012] In the above-mentioned adhesive preparation device, a notch is formed on the top of the support column, and the end of the plastic brush extends into the notch to increase the contact area between the plastic brush and the finished product.

[0013] In the above-mentioned adhesive backing preparation device, a limiting block is fixedly installed in the lower cylinder body and abuts against the top of the fixing ear to ensure that the top height of the supporting column is specific in the initial state.

[0014] The adhesive backing preparation device described above has a blanking plate in the lower cylinder, and the finished product detached from the support column falls into the blanking plate. A discharge port is provided at the bottom of the side of the lower cylinder to allow the finished product falling into the blanking plate to slide out from the discharge port.

[0015] In the above-mentioned adhesive preparation device, when the support column is pressed down and moved by the extrusion block, the gas in the cylinder body is driven to be blown out through the air hole so that the finished product falling on the blanking plate can slide out of the discharge port smoothly.

[0016] The above-mentioned adhesive backing preparation device has a pressure rod arranged in the lower cylinder. When the finished product is not separated from the support column after being moved by the plastic brush, as the support column continues to move upward, the bottom of the pressure rod abuts against the finished product, so that the finished product is tilted up and separated from the support column and falls into the blanking plate.

[0017] In the above-mentioned adhesive backing preparation device, the minimum distance between the pressure rod and the support column is greater than the thickness of the finished product.

[0018] A back glue preparation process, based on the back glue preparation device, comprises the following steps:

[0019] S1: Punching: The tensioned adhesive passes through the upper and lower dies, and the bottom of the adhesive abuts against the top of the support column to achieve support. The servo cylinder is started to drive the upper die to move downward to first press the adhesive with the extrusion block, and then the extrusion block slides upward elastically until the ring knife punches the adhesive;

[0020] S2: Collecting finished products: After the adhesive backing is punched out into finished products, the extrusion block moves up to the limit state, and then the extrusion block pushes the support column to slide down elastically so that the finished product enters the lower cylinder, and then the upper mold is driven to move up by the servo cylinder, and the support column also moves up elastically. Based on the setting of the air holes, the upward movement speed of the upper mold is greater than the upward movement speed of the support column to separate the extrusion block from the finished product, and the support column drives the toggle mechanism to separate the finished product from the support column during the upward movement process, so as to realize the collection of the finished product;

[0021] S3: Finished product discharge: The finished product detaches from the support column and falls into the blanking plate, and is discharged through the discharge port. When the support column moves down next time, it pushes the gas in the cylinder to blow out through the air hole so that the finished product falling on the blanking plate can slide out of the discharge port smoothly.

[0022] Beneficial effects:

[0023] In the above technical scheme, the present invention provides a back glue preparation device and preparation process, which improves the structure of the upper mold and the lower mold, uses the support column in the lower mold to support the bottom of the back glue, and the first compression spring in the upper mold to clamp and fix the back glue, so that the back glue can be effectively supported during punching and is not easy to produce the problem of finished product size and shape deviation, and cleverly designs the support column to move up at a speed lower than the upper mold to move up, so that the extrusion block can be separated from the finished product when the upper mold moves up, and through the linkage between the support column and the toggle mechanism, the toggle mechanism can detach the unfixed finished product from the support column, thereby realizing the automatic collection of the finished product in the lower cylinder, creatively realizing that the finished product will not fall on the lower mold, so as to achieve the purpose of continuous punching and facilitating the collection of the finished product after punching. Therefore, the present invention can not only increase the support for the back glue so that the back glue is not easy to produce the finished product size and shape deviation during punching, but also can make the punched finished product not be blocked and automatically fall and be collected to achieve the purpose of continuous punching and facilitating the collection of the finished product after punching;

[0024] Furthermore, the provision of the air holes in the present invention not only allows the gas to flow in and out so that the support column can move up and down, and slows down the upward movement speed of the support column so that the finished product can be released from fixation, but also unexpectedly reuses the gas discharged from the cylinder body so that the finished product can slide out smoothly from the discharge port to prevent accumulation in the blanking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of the structure of a back adhesive preparation device provided in an embodiment of the present invention;

[0027] Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the enlarged structure of part A;

[0028] Figure 3 A schematic diagram of the structure of the upper mold and the lower mold provided by an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of the lower mold from a first perspective after the lower cylinder is removed provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of the lower mold from a second perspective after the lower cylinder is removed provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of a cross-sectional structure between an upper mold, a lower mold and a backing adhesive in an initial state provided by an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the cross-sectional structure between the upper mold, the lower mold and the backing glue when the backing glue provided by the embodiment of the present invention is clamped;

[0033] Figure 8 The embodiment of the present invention provides Figure 7 A schematic diagram of the enlarged structure of part B in FIG.

[0034] Fig. 9 A schematic diagram of the cross-sectional structure between the upper die, the lower die and the adhesive backing when the finished product punched out according to an embodiment of the present invention moves downward into the lower cylinder;

[0035] Fig.10 A schematic diagram of the cross-sectional structure between the upper mold, the lower mold and the backing glue during the upper mold upward movement process provided by an embodiment of the present invention;

[0036] Fig.11 A schematic diagram of the cross-sectional structure between the upper mold, the lower mold and the adhesive backing during the process of the finished product provided by the embodiment of the present invention being pushed by the plastic brush;

[0037] Fig.12 A schematic diagram of the cross-sectional structure between the upper mold, the lower mold and the adhesive backing during the abutment process between the pressing rod and the finished product when the finished product is not pushed out of the support column by the plastic brush provided in an embodiment of the present invention;

[0038] Fig.13 A schematic diagram of the cross-sectional structure between the upper die, the lower die and the adhesive backing when the finished product of the upper die and the lower die reset according to an embodiment of the present invention falls into the blanking plate.

[0039] Description of reference numerals:

[0040] 1. Pressure rod; 2. Lower cylinder; 201. Discharge port; 3. Cylinder; 301. Air hole; 4. First compression spring; 5. Blanking plate; 501. Inclined plate; 502. Inclined bottom plate; 6. Support column; 601. Fixing ear; 602. Notch; 7. Upper roller; 701. Plastic brush; 8. Lower roller; 9. Pull rope; 10. Adhesive tape; 1001. Finished product; 11. Extrusion block; 12. Upper cylinder; 13. Ring knife; 14. Second compression spring; 15. Blocking block; 16. Fixed seat; 17. Crossbeam; 18. First winding roller; 19. Second winding roller; 20. Third winding roller; 21. Extrusion roller; 22. Unwinding roller; 23. Collecting cover; 24. Servo cylinder; 25. Flat plate. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] First embodiment:

[0043] like Figure 1-13 As shown, an adhesive preparation device provided by an embodiment of the present invention comprises a lower mold and an upper mold driven by a servo cylinder 24 to reciprocate up and down, the lower mold comprises a lower cylinder 2 with an avoidance hole on the top, a cylinder 3 is fixed in the lower cylinder 2, a support column 6 for supporting the adhesive 10 is elastically and dynamically sealed in the cylinder 3, the top of the support column 6 passes through the avoidance hole and abuts against the bottom of the adhesive 10, and an air hole 301 is opened on the cylinder 3 to reduce the sliding speed of the support column 6;

[0044] The lower mold also includes a toggle mechanism disposed in the lower cylinder 2 and linked to the support column 6;

[0045] The upper die includes an upper cylinder 12 fixedly connected to the power output shaft of the servo cylinder 24, an extrusion block 11 coaxial with the support column 6 is elastically slidably arranged in the upper cylinder 12, a ring knife 13 is coaxially arranged at the bottom of the upper cylinder 12, and the bottom of the extrusion block 11 penetrates the ring knife 13 and extends to the bottom of the ring knife 13;

[0046] When the upper mold moves downward, the extrusion block 11 presses the backing glue 10 and then elastically moves upward so that the ring knife 13 punches out the finished product 1001 from the backing glue 10. Then, the extrusion block 11 pushes the support column 6 to elastically slide down so that the finished product 1001 enters the lower cylinder 2. When the upper mold moves upward, its speed is greater than the upward speed of the support column 6 so that the extrusion block 11 is separated from the finished product 1001, and in the process of the support column 6 moving upward, it drives the toggle mechanism to detach the finished product 1001 from the support column 6.

[0047] The adhesive preparation device provided in this embodiment is used to punch out a single finished product from the adhesive, wherein the words related to direction and position in this embodiment are relative to the accompanying drawings, and the "dynamic seal" in this embodiment refers to sealing sliding. Specifically, it includes a fixed seat 16, a crossbeam 17 is fixedly installed on the fixed seat 16 through a plurality of vertical plates, the lower mold is fixedly installed on the fixed seat 16, a flat plate 25 is fixedly installed on the crossbeam 17, a servo cylinder 24 is fixedly installed on the flat plate 25, and the power output shaft of the servo cylinder 24 passes through the flat plate 25 and is connected to the upper mold, a feed unwinding roller 22, a first winding roller 18, and a second winding roller 19 arranged in sequence are rotatably provided on the crossbeam 17, the adhesive 10 is composed of a base film, an adhesive film and a dust shielding film, the feed unwinding roller 22 is used to unwind the adhesive 10, the first winding roller 18 is used to wind up the dust shielding film on the adhesive 10 after punching, and the second winding roller 19 is used to wind up the dust shielding film on the adhesive 10 after punching. The adhesive film on the adhesive backing 10 is rotatably provided with a third winding roller 20 on the vertical plate, and the third winding roller 20 is used to wind up the base film on the adhesive backing 10 after punching. The feed roller 22, the first winding roller 18, the second winding roller 19, and the third winding roller 20 are each driven to rotate by a servo motor. Three groups of squeezing rollers 21 are also rotatably provided on the vertical plate, and each group of squeezing rollers 21 includes two pressure rollers arranged opposite to each other up and down, and the adhesive backing 10 passes through between the two pressure rollers. One group of squeezing rollers 21 is located between the feed roller 22 and the lower mold, one group of squeezing rollers 21 is located between the lower mold and the first winding roller 18, and one group of squeezing rollers 21 is located between the first winding roller 18 and the second winding roller 19. The adhesive backing 10 passes through a group of squeezing rollers 21 from the unwinding roller 22 and then passes between the upper mold and the lower mold, and then passes through the next group of squeezing rollers 21. Then the dust shielding film is rolled up on the first winding roller 18. Then, the adhesive backing 10 without the dust shielding film passes through the next group of squeezing rollers 21, and the adhesive film is rolled up on the second winding roller 19 and the base film is rolled up on the third winding roller 20, and the adhesive backing 10 is in a stretched state.

[0048] The lower cylinder 2 on the lower mold is fixedly mounted on the fixed seat 16, and the avoidance hole opened on the top of the lower cylinder 2 is coaxial with the upper mold and can allow the upper mold to pass through. The cylinder 3 is located inside the lower cylinder 2, and the bottom of the cylinder 3 is fixed and sealed to the bottom of the inner cavity of the lower cylinder 2. The support column 6 is dynamically sealed and inserted in the cylinder 3, and the top of the support column 6 extends to the top of the lower cylinder 2 after passing through the avoidance hole, which is used to abut against the bottom of the tensioned backing glue 10. A first compression spring 4 is connected and installed between the bottom of the support column 6 and the bottom of the inner cavity of the cylinder 3. The elastic sliding of the support column 6 is realized based on the elastic force of the first compression spring 4, and the first compression spring 4 is always in a compressed state so that the support column 6 has sufficient downward resistance. The air hole 301 is provided at the lower side of the cylinder body 3 for the inlet and outlet of gas so that the support column 6 can slide up and down. The air hole 301 has a small aperture to reduce the amount of gas passing through, thereby successively reducing the sliding speed of the support column 6. The purpose of reducing the sliding speed of the support column 6 is to separate the extrusion block 11 from the support column 6 during the upward movement of the upper die, so that the punched product 1001 is not pressed down by the extrusion block 11. The toggle mechanism in the lower die is linked to the support column 6, and when the support column 6 moves upward, it can drive the toggle mechanism to separate the finished product 1001 on the support column 6 from the support column 6.

[0049] The upper mold is driven by the servo cylinder 24 to reciprocate up and down. The upper cylinder 12 in the upper mold is fixedly connected to the power output shaft of the servo cylinder 24. The bottom of the upper cylinder 12 is open. An extrusion block 11 is slidably installed in the upper cylinder 12. The extrusion block 11 is used to cooperate with the support column 6 to clamp the back glue 10. A second compression spring 14 is installed between the top of the extrusion block 11 and the top of the inner cavity of the upper cylinder 12. One end of the second compression spring 14 is fixedly connected to the extrusion block 11, and the other end is fixedly connected to the upper cylinder 12. A blocking block 15 for limiting the extrusion block 11 is installed in the upper cylinder 12, so that the extrusion block 11 moves up to a specific height and then abuts against the blocking block 15, wherein the elastic force of the second compression spring 14 is much smaller than the elastic force of the first compression spring 4. Before the extrusion block 11 abuts against the blocking block 15, the support column 6 cannot overcome the elastic force of the first compression spring 4 and move downward. The ring knife 13 is fixedly installed at the bottom of the upper cylinder 12. The shape of the ring knife 13 corresponds to the specific application product. In this embodiment, the ring knife 13 takes a circular ring shape as an example. The extrusion block 11 passes through the ring knife 13. In the initial state, the bottom of the extrusion block 11 extends to the bottom of the ring knife 13, so that when the upper mold moves downward, the bottom of the extrusion block 11 first contacts the top of the back glue 10, so that the top and bottom of the back glue 10 are pressed and then punched by the ring knife 13.

[0050] The working principle of the present invention is as follows: first, the adhesive 10 is installed and in a tensioned state, at which time the bottom of the adhesive 10 abuts against the top of the support column 6, and then the setting program is installed to start each servo motor to make the adhesive 10 move intermittently. When the adhesive 10 stops moving, the servo cylinder 24 is started to drive the upper mold to move downward. When the upper mold moves downward, it drives the extrusion block 11 to move downward to press the adhesive 10 between the extrusion block 11 and the support column 6. Then, as the upper mold continues to move downward, the extrusion block 11 continues to move toward the interior of the upper cylinder 12. The ring knife 13 slides elastically to continuously approach the adhesive backing 10. When the extrusion block 11 abuts against the blocking block 15, the ring knife 13 completes the punching of the adhesive backing 10. The punched product 1001 continues to be clamped by the extrusion block 11 and the support column 6. Then the extrusion block 11 presses the support column 6 downward to slide toward the inside of the cylinder 3. The gas in the cylinder 3 is discharged through the air hole 301. The upper mold penetrates the adhesive backing 10 and the avoidance hole on the top of the lower cylinder 2 until the upper mold stops at a specific height. At this time, the finished product 1001 is located in the lower cylinder 2. Then The servo cylinder 24 drives the upper die to move upward and reset. The speed at which the servo cylinder 24 drives the upper die to move upward is much greater than the speed at which the upper die moves downward. The upper die moves downward slowly to adapt to the speed at which the gas is discharged from the air hole 301. When the upper die moves upward, the moving speed of the upper die increases, and the support column 6 also moves upward under the action of the first compression spring 4. However, based on the air intake speed of the air hole 301, the moving speed of the support column 6 is much lower than the moving speed of the upper die. Therefore, when the upper die moves upward, the extrusion block 11 first pops out from the upper cylinder 12 to make the finished product 1 001 moves out of the ring knife 13 to the support column 6, and then the extrusion block 11 is separated from the finished product 1001 to release the clamping fixation of the finished product 1001, and then the support column 6 slowly moves upward. During the upward movement of the support column 6, the toggle mechanism is driven to move, so that the toggle mechanism separates the finished product 1001 from the support column 6 to realize the collection of the finished product 1001, and then the back glue 10 is pulled again, and so on. Since the finished product 1001 falls into the lower cylinder 2 and is collected, it will not hinder the continuous punching of the back glue 10.

[0051] It can be seen that, in the present invention, by improving the structure of the upper and lower molds, the support column 6 in the lower mold is used to support the bottom of the back glue 10, and the first compression spring 4 in the upper mold is used to clamp and fix the back glue 10, so that the back glue 10 can be effectively supported during punching and is not prone to the problem of deviation in the size and shape of the finished product. The upward movement speed of the support column 6 is cleverly designed to be lower than the upward movement speed of the upper mold, so that the extrusion block 11 can be separated from the finished product 1001 when the upper mold moves upward, and the support column 6 is linked with the toggle mechanism, so that the toggle mechanism can detach the unfixed finished product 1001 from the support column 6, thereby realizing the automatic collection of the finished product 1001 in the lower cylinder 2, and creatively realizing that the finished product 1001 will not fall above the lower mold, thereby achieving the purpose of continuous punching and facilitating the collection of the finished product after punching. Therefore, the present invention can not only add support to the backing glue so that the backing glue is not prone to deviations in the size and shape of the finished product during punching, but also enable the punched finished products to be automatically collected without being blocked, thereby achieving the purpose of continuous punching and facilitating the collection of the punched finished products, and can effectively solve the shortcomings of the prior art.

[0052] Furthermore, since the materials of the dust shielding film, adhesive film and base film are different, their waste materials need to be classified and recycled. In the prior art, they are classified and processed separately after punching, which undoubtedly increases the workload of the operator. For this reason, the present invention completes automatic classification and recycling immediately after the back adhesive 10 is punched out. The dust shielding film is rolled up on the first winding roller 18, the adhesive film is rolled up on the second winding roller 19, and the base film is rolled up on the third winding roller 20. This makes it more convenient to classify and recycle the various materials after the back adhesive 10 is punched out, eliminating the subsequent separate classification operations to reduce the workload of the operator.

[0053] In this embodiment, the toggle mechanism includes an upper roller 7 and a lower roller 8 arranged in the lower cylinder 2. The upper roller 7 is elastically rotatable. The outer circumference of the upper roller 7 is provided with an elastic plastic brush 701. The plastic brush 701 elastically abuts against the outer circumference of the support column 6. The support column 6 is provided with two symmetrically arranged fixing ears 601. The two fixing ears 601 are fixedly connected to the upper roller 7 through a pull rope 9. The pull rope 9 bypasses the bottom of the lower roller 8. During the upward movement of the support column 6, the upper roller 7 is pulled by the pull rope 9 to rotate counterclockwise so that the plastic brush 701 toggles the finished product 1001 on the support column 6 to move. Specifically, a torsion spring (not shown in the figure) is installed between the upper roller 7 and the lower cylinder 2. The torsion of the torsion spring is used to realize the elastic rotation of the upper roller 7. The design of the torsion spring is a prior art and will not be repeated here. The elastic rotation of the upper roller 7 is to enable the upper roller 7 to automatically reset and to further increase the resistance of the support column 6 to move upward, so as to reduce the upward movement speed of the support column 6. The lower rotating roller 8 is rotatably arranged in the lower cylinder 2, and the lower rotating roller 8 is used to orient the pull rope 9. The plastic brush 701 is used to move the finished product 1001 on the support column 6, so the plastic brush 701 needs to contact the finished product 1001, but also contacts the upper cylinder 12 and the support column 6 at the same time, so the elastic characteristics of the plastic brush 701 are utilized, so that when the plastic brush 701 contacts the upper cylinder 12 or the support column 6, the plastic brush 701 can produce elastic deformation so that the plastic brush 701 does not block the upper cylinder 12 and the support column 6, and the contact of the plastic brush 701 with the upper cylinder 12 and the support column 6 can produce a cleaning effect on the upper cylinder 12 and the support column 6. The working principle of the above structure is as follows: in the initial state, the torque direction of the upper rotating roller 7 is clockwise, and the torque direction generated by the pull rope 9 pulling the upper rotating roller 7 is counterclockwise. As the extrusion block 11 presses down the support column 6 to slide downward, the support column 6 continuously releases the pulling force of the pull rope 9 on the upper rotating roller 7, so that the upper rotating roller 7 continuously rotates clockwise under the action of the torsion spring, so that the plastic brush 701 rotates clockwise to clean the outside of the support column 6 and the upper cylinder 12 until the support column 6 moves down to the lowest point. At this time, the finished product 1001 is located below the plastic brush 701. When the upper mold moves upward, the support column 6 moves upward under the elastic pulling action of the first compression spring 4, and Under the action of the torsion spring and the air hole 301, the upward movement speed of the support column 6 is slow, so that the extrusion block 11 and the support column 6 are separated by a distance, and the finished product 1001 is pushed to the top of the support column 6 by the extrusion block 11 and moves upward with the support column 6. During the upward movement of the support column 6, the upper rotating roller 7 is pulled counterclockwise by the pull rope 9, and the counterclockwise rotation of the upper rotating roller 7 drives the plastic brush 701 to rotate counterclockwise. The counterclockwise rotation of the plastic brush 701 can enable the plastic brush 701 to lift and push the finished product 1001 from the bottom or side of the finished product 1001, thereby sliding the finished product 1001 off the support column 6.

[0054] Furthermore, the diameter of the support column 6 is not larger than the diameter of the extrusion block 11, and a gap is formed between the inner wall of the ring knife 13 and the outer side surface of the extrusion block 11 so that the outer edge of the finished product 1001 punched out by the ring knife 13 is located outside the support column 6, thereby facilitating the plastic brush 701 to move the finished product 1001.

[0055] Furthermore, a notch 602 is provided at the top of the support column 6, and the end of the plastic brush 701 extends into the notch 602 to increase the contact area between the plastic brush 701 and the finished product 1001, thereby further increasing the moving distance of the finished product 1001 on the support column 6 pushed by the plastic brush 701.

[0056] Furthermore, in order to ensure that the finished product 1001 can be separated from the support column 6, in this embodiment, Fig.12 As shown, a pressure rod 1 is provided in the lower cylinder 2. When the finished product 1001 is not separated from the support column 6 after being moved by the plastic brush 701, as the support column 6 continues to move upward, the bottom of the pressure rod 1 abuts against the finished product 1001, so that the finished product 1001 is tilted up and separated from the support column 6 and falls into the blanking plate 5.

[0057] The minimum distance between the pressing rod 1 and the supporting column 6 is greater than the thickness of the finished product 1001 , so that the finished product 1001 will not be stuck between the supporting column 6 and the pressing rod 1 when sliding down from the supporting column 6 .

[0058] In this embodiment, the outer periphery of the upper cylinder 12 does not exceed the outer periphery of the ring knife 13 , so that after the adhesive backing 10 is punched out by the ring knife 13 , the upper cylinder 12 can pass through the punching opening of the adhesive backing 10 .

[0059] In this embodiment, a limit block (not shown in the figure) is fixedly installed in the lower cylinder 2 and abuts against the top of the fixing ear 601 to make the top height of the support column 6 specific in the initial state. Under the action of the limit block, the first compression spring 4 is in a compressed state in the initial state, so that when the extrusion block 11 presses down the back glue 10, the extrusion block 11 first compresses the second compression spring 14 for compression. When the extrusion block 11 abuts against the blocking block 15, the extrusion block 11 can overcome the elastic force of the first compression spring 4 and push the support column 6 downward.

[0060] In this embodiment, a blanking plate 5 is provided in the lower cylinder 2, and the finished product 1001 detached from the support column 6 falls into the blanking plate 5, and a discharge port 201 is provided at the bottom of the side of the lower cylinder 2 so that the finished product 1001 falling into the blanking plate 5 can slide out from the discharge port 201. The blanking plate 5 includes two inclined plates 501 arranged symmetrically front and back and an inclined bottom plate 502 fixedly connected to the bottom of the two inclined plates 501, and the opposite surfaces of the two inclined plates 501 are inclined inward from top to bottom, and the inclined bottom plate 502 is inclined downward toward the direction of the discharge port 201. The arrangement of the two inclined plates 501 allows the finished product 1001 to accurately fall into the blanking plate 5 and be caught by the inclined bottom plate 502, and then slide out from the discharge port 201 along the inclined bottom plate 502.

[0061] Furthermore, when the support column 6 is pressed down by the extrusion block 11, the gas in the cylinder 3 is driven to be blown out through the air hole 301 so that the finished product 1001 falling in the blanking plate 5 can smoothly slide out from the discharge port 201. Based on the friction between the finished product 1001 and the blanking plate 5, the finished product 1001 is easily accumulated when falling in the blanking plate 5 and cannot smoothly slide out from the discharge port 201. In this embodiment, the air hole 301 is arranged facing the blanking plate 5. By cleverly utilizing the arrangement of the air hole 301, when the support column 6 moves downward, the gas in the cylinder 3 is discharged from the air hole 301 and blown toward the finished product 1001 in the blanking plate 5 so that the finished product 1001 generates a driving force toward the discharge port 201, thereby facilitating the finished product 1001 to slide out from the discharge port 201, which can effectively avoid the problem of the finished product 1001 being pushed and accumulated in the blanking plate 5. It can be seen that the provision of the air hole 301 in the present invention not only allows the gas to enter and exit so that the support column 6 can move up and down, and slows down the upward movement speed of the support column 6 so that the finished product 1001 can be released from fixation, but also unexpectedly reuses the gas discharged from the cylinder 3 to enable the finished product 1001 to slide smoothly out of the discharge port 201 to prevent accumulation in the blanking plate 5.

[0062] In this embodiment, a collecting cover 23 is fixedly installed on the fixing seat 16, and the collecting cover 23 is located at the front end of the discharge port 201, so that the finished product 1001 sliding out of the discharge port 201 enters the collecting cover 23, preventing the finished product 1001 from being too dispersed after sliding out of the discharge port 201.

[0063] Second embodiment:

[0064] like Figure 1-13 As shown, a back glue preparation process includes the following steps:

[0065] S1: Punching: The tensioned adhesive 10 passes between the upper die and the lower die, and the bottom of the adhesive 10 abuts against the top of the support column 6 to achieve support. The servo cylinder 24 is started to drive the upper die to move downward to firstly make the extrusion block 11 press the adhesive 10, and then the extrusion block 11 elastically slides upward until the ring knife 13 punches the adhesive 10;

[0066] S2: Collecting finished product 1001: After the adhesive backing 10 is punched out into finished product 1001, the extrusion block 11 moves up to the limit state, and then the extrusion block 11 pushes the support column 6 to elastically slide down so that the finished product 1001 enters the lower cylinder 2, and then the upper mold is driven to move up by the servo cylinder 24, and the support column 6 also moves up elastically. Based on the setting of the air hole 301, the upward movement speed of the upper mold is greater than the upward movement speed of the support column 6 to separate the extrusion block 11 from the finished product 1001, and the support column 6 drives the toggle mechanism to separate the finished product 1001 from the support column 6 during the upward movement, so as to realize the collection of the finished product 1001;

[0067] S3: Discharge of finished product 1001: After detaching from the support column 6, the finished product 1001 falls into the blanking plate 5 and is discharged through the discharge port 201. When the support column 6 moves down next time, it pushes the gas in the cylinder 3 to blow out through the air hole 301 so that the finished product 1001 that falls into the blanking plate 5 can slide out smoothly from the discharge port 201.

[0068] S4: waste classification and winding: the adhesive backing 10 passes through a group of squeezing rollers 21 from the unwinding roller 22, passes between the upper mold and the lower mold, and is punched out. The punched adhesive backing 10 then passes through the next group of squeezing rollers 21, and then the dust shielding film is wound on the first winding roller 18. Then the adhesive backing 10 without the dust shielding film passes through the next group of squeezing rollers 21, and the adhesive film is wound on the second winding roller 19 and the base film is wound on the third winding roller 20, thereby realizing the automatic classification and winding of waste.

[0069] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for preparing adhesive, comprising a lower mold and an upper mold driven by a servo cylinder (24) to reciprocate up and down, characterized in that: The lower mold comprises a lower cylinder (2) with an avoidance hole at the top, a cylinder (3) is fixedly arranged in the lower cylinder (2), a support column (6) for supporting the adhesive backing (10) is elastically and dynamically sealed in the cylinder (3), the top of the support column (6) passes through the avoidance hole and abuts against the bottom of the adhesive backing (10), and an air hole (301) is arranged on the cylinder (3) to reduce the sliding speed of the support column (6); The lower mold also includes a toggle mechanism disposed in the lower cylinder (2) and linked to the support column (6); The upper die comprises an upper cylinder (12) fixedly connected to the power output shaft of the servo cylinder (24), an extrusion block (11) coaxial with the support column (6) is elastically slidably arranged in the upper cylinder (12), a ring knife (13) is coaxially arranged at the bottom of the upper cylinder (12), and the bottom of the extrusion block (11) penetrates the ring knife (13) and extends to the bottom of the ring knife (13); When the upper mold moves downward, the extrusion block (11) presses the adhesive backing (10) and then elastically moves upward so that the ring knife (13) punches the adhesive backing (10) to produce a finished product (1001). Then, the extrusion block (11) pushes the support column (6) to elastically slide downward so that the finished product (1001) enters the lower cylinder (2). When the upper mold moves upward, its speed is greater than the upward speed of the support column (6) so that the extrusion block (11) and the finished product (1001) are separated. In the process of the support column (6) moving upward, the toggle mechanism is driven to detach the finished product (1001) from the support column (6).

2. The adhesive preparation device according to claim 1, characterized in that: The toggle mechanism comprises an upper rotating roller (7) and a lower rotating roller (8) arranged in the lower cylinder (2); the upper rotating roller (7) is arranged to rotate elastically; the outer peripheral surface of the upper rotating roller (7) is provided with an elastic plastic brush (701); the plastic brush (701) elastically abuts against the outer peripheral surface of the support column (6); the support column (6) is provided with two symmetrically arranged fixing ears (601); the two fixing ears (601) are each fixedly connected to the upper rotating roller (7) through a pull rope (9); the pull rope (9) is passed around the bottom of the lower rotating roller (8); during the upward movement of the support column (6), the upper rotating roller (7) is pulled by the pull rope (9) to rotate counterclockwise so that the plastic brush (701) toggle the finished product (1001) on the support column (6) to move.

3. The adhesive preparation device according to claim 2, characterized in that: The diameter of the support column (6) is not greater than the diameter of the extrusion block (11), and a gap is formed between the inner wall of the ring knife (13) and the outer side surface of the extrusion block (11) so that the outer edge of the finished product (1001) punched out by the ring knife (13) is located outside the support column (6), thereby facilitating the plastic brush (701) to move the finished product (1001).

4. The adhesive preparation device according to claim 2, characterized in that: A notch (602) is provided at the top of the support column (6), and the end of the plastic brush (701) extends into the notch (602) to increase the contact area between the plastic brush (701) and the finished product (1001).

5. The adhesive preparation device according to claim 2, characterized in that: A limiting block is fixedly installed in the lower cylinder (2) and abuts against the top of the fixing ear (601) so that the top height of the supporting column (6) is specific in the initial state.

6. The adhesive preparation device according to claim 1, characterized in that: A blanking plate (5) is arranged inside the lower cylinder (2), and the finished product (1001) detached from the support column (6) falls into the blanking plate (5). A discharge port (201) is provided at the bottom of the side surface of the lower cylinder (2) so that the finished product (1001) falling into the blanking plate (5) can slide out from the discharge port (201).

7. The adhesive preparation device according to claim 6, characterized in that: When the support column (6) is pressed down and moved by the extrusion block (11), the gas in the cylinder body (3) is driven to be blown out through the air hole (301) so that the finished product (1001) falling on the blanking plate (5) can slide out smoothly from the discharge port (201).

8. The adhesive preparation device according to claim 2, characterized in that: A pressing rod (1) is provided in the lower cylinder (2). When the finished product (1001) is not separated from the support column (6) after being moved by the plastic brush (701), as the support column (6) continues to move upward, the bottom of the pressing rod (1) contacts the finished product (1001), so that the finished product (1001) is lifted up, separated from the support column (6), and falls into the blanking plate (5).

9. The adhesive preparation device according to claim 8, characterized in that: The minimum distance between the pressure rod (1) and the support column (6) is greater than the thickness of the finished product (1001).

10. A process for preparing adhesive backing, which is based on the adhesive backing preparation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Punching: The tensioned adhesive (10) passes between the upper die and the lower die, and the bottom of the adhesive (10) abuts against the top of the support column (6) to achieve support. The upper die is driven downward by starting the servo cylinder (24) to firstly cause the extrusion block (11) to press the adhesive (10), and then the extrusion block (11) elastically slides upward until the ring knife (13) punches the adhesive (10); S2: collecting the finished product (1001): after the adhesive backing (10) is punched out to form the finished product (1001), the extrusion block (11) moves upward to the limit state, and then the extrusion block (11) pushes the support column (6) to slide elastically downward so that the finished product (1001) enters the lower cylinder (2), and then the upper mold is driven upward by the servo cylinder (24), and the support column (6) also moves upward elastically. Based on the setting of the air hole (301), the upward movement speed of the upper mold is greater than the upward movement speed of the support column (6) so that the extrusion block (11) and the finished product (1001) are separated, and the support column (6) drives the toggle mechanism to separate the finished product (1001) from the support column (6) during the upward movement, thereby realizing the collection of the finished product (1001); S3: Discharge of the finished product (1001): After the finished product (1001) is detached from the support column (6), it falls into the blanking plate (5) and is discharged through the discharge port (201). When the support column (6) moves downward next time, it pushes the gas in the cylinder body (3) to be blown out through the air hole (301) so that the finished product (1001) that has fallen into the blanking plate (5) can slide out smoothly from the discharge port (201).

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