Aging-resistant PET sheet and trimming device for processing the same

Abstract

The utility model discloses an anti -aging PET sheet, including sheet main part, sheet main part includes PET base material, and the top of PET base material is compounded with the anti -aging layer, and the bottom of PET base material is compounded with the reinforcing layer, the utility model discloses still a kind of anti -aging PET sheet processing with trimming device, including support mechanism and two cutting knives, and the winding mechanism for being wound to sheet main body is equipped on support mechanism, and cutting knife is contacted with winding mechanism and is used to carry out trimming treatment to sheet main body. The anti -aging layer can effectively absorb ultraviolet rays, and the antioxidant master batch in the anti -aging layer can inhibit the oxidation of the PET base material, significantly improve the anti -aging performance of the PET sheet, and the reinforcing layer can enhance the mechanical properties of the PET sheet, making the PET sheet more durable. The connecting mechanism can realize the detachable connection of the cutting knife and the distance adjusting mechanism, which facilitates the disassembly and grinding or replacement of the cutting knife when it is not sharp after long-term use, to ensure the subsequent trimming effect of the cutting knife.

Description

Technical Field

[0001] This utility model relates to the field of PET sheet technology, specifically to an aging-resistant PET sheet and a cutting device for its processing. Background Technology

[0002] PET sheets (polyethylene terephthalate) are a common thermoplastic with advantages such as high dimensional stability, excellent mechanical strength, good creep resistance, chemical resistance, and extremely low moisture absorption. They are widely used in blister packaging in industries such as electronics, hardware, stationery, cosmetics, and gifts, as well as in the production of windows, folding boxes, and plastic tubes.

[0003] Ordinary PET sheets are susceptible to aging and degradation in outdoor environments or under harsh conditions such as high temperature and humidity, due to factors such as ultraviolet radiation, oxygen, and heat. For example, in applications such as outdoor advertising lightbox fabrics and tarpaulins, polyester materials (PET belongs to the polyester family) must withstand sunlight, heat, oxygen, and water; their susceptibility to photoaging limits their application range. Ultraviolet radiation causes the PET molecular chains to break and cross-link, leading to a decline in the material's mechanical properties, such as reduced tensile strength and impact strength, making the material brittle and prone to breakage. Simultaneously, aging also affects the appearance of PET sheets, causing them to yellow and lose their luster.

[0004] In the production and processing of PET sheets, an edge-cutting device is needed to remove the edge material and ensure the flatness of the sheet. The existing patent document with publication number CN206812047U discloses a continuous PET sheet edge-cutting mechanism. The disc cutter is adjusted in position through a threaded structure to achieve different edge-cutting positions on the PET sheet, ensuring that the edge is not cut too much or too little. By setting a cutting blade, it is ensured that the edge material can be completely cut off, ensuring the smooth progress of the edge-cutting process.

[0005] Although the aforementioned continuous PET sheet trimming mechanism can solve the corresponding technical problems, its disc cutter becomes dull after prolonged use. However, the disc cutter is fixedly mounted on the bushing, making it difficult to disassemble, sharpen, or replace the cutter, thus reducing the trimming effect of subsequent sheets. Therefore, an aging-resistant PET sheet and its processing trimming device are proposed. Utility Model Content

[0006] The purpose of this invention is to provide an aging-resistant PET sheet and a cutting device for processing it, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An aging-resistant PET sheet includes a sheet body, wherein:

[0009] The sheet material includes a PET substrate, with an aging-resistant layer laminated to the top and a reinforcing layer laminated to the bottom.

[0010] Preferably, the aging-resistant layer is made by blending nano-titanium dioxide with antioxidant masterbatch, and the reinforcing layer is a glass fiber reinforced polyester film.

[0011] This utility model also provides a trimming device for processing aging-resistant PET sheets, including a support mechanism and two cutters. The support mechanism is provided with a winding mechanism for winding the sheet body. The cutters contact the winding mechanism and are used to trim the edges of the sheet body. The support mechanism is provided with a spacing adjustment mechanism for adjusting the distance between the two cutters and a height adjustment mechanism for adjusting the distance between the cutters and the winding mechanism. A connecting mechanism for detachable connection is provided between the cutters and the spacing adjustment mechanism, wherein:

[0012] The connecting mechanism includes a mounting block located below the adjusting mechanism. The bottom of the mounting block has a slot, and the top of the cutter is inserted into the inner cavity of the slot. Both sides of the surface of the cutter are integrally formed with protrusions. Both sides of the inner cavity of the slot have grooves that match the protrusions. The protrusions are engaged in the inner cavity of the grooves. The mounting block is provided with a positioning element for limiting the position of the cutter.

[0013] Preferably, the aforementioned support mechanism includes a base plate, on the top of which two first supports and a second support are fixedly connected in sequence along the conveying direction. The winding mechanism is located between the first supports and the second supports. The cutter and the distance adjustment mechanism are both located between the two first supports. The height adjustment mechanism is located on the first support.

[0014] Preferably, the winding mechanism includes a guide roller rotatably connected between two first supports, and a first winding roller and a second winding roller are rotatably connected between the two second supports from top to bottom. A motor is installed on one side of one of the second supports, and the output shaft of the motor is fixedly connected to the first winding roller. The first winding roller and the second winding roller are connected by a pulley and belt drive.

[0015] Preferably, the adjusting mechanism includes a bidirectional screw that is movably connected between the two first supports and located directly above the guide roller. Both sides of the surface of the bidirectional screw are threaded with screw sleeves. The screw sleeves are arranged in a one-to-one correspondence with the mounting blocks, and the screw sleeves are fixedly connected to the top of the mounting blocks. A limiting member for limiting the screw sleeves is also provided between the two first supports.

[0016] Preferably, the limiting member includes a guide rod arranged parallel to the bidirectional screw, and guide sleeves are slidably sleeved on both sides of the surface of the guide rod. The guide sleeves are arranged in a one-to-one correspondence with the screw sleeves, and the guide sleeves are fixedly connected to the top of the screw sleeves.

[0017] Preferably, the height adjustment mechanism includes a through hole in the first bracket, a support rod in the inner cavity of the through hole, and a movable plate movably sleeved on the surface of the support rod. The bottom end of one of the support rods is rotatably connected to the inner wall of the corresponding through hole and threadedly connected to the corresponding movable plate. Both ends of the other support rod are fixedly connected to the inner wall of the corresponding through hole and slidably connected to the corresponding movable plate. The bidirectional screw is rotatably connected between the two movable plates, and the guide rod is fixedly connected between the two movable plates.

[0018] Preferably, one end of the groove is open and the other end is closed, and the positioning member can cover the open end.

[0019] Preferably, the positioning element includes a baffle located at the opening of the groove, the baffle being bolted to the mounting block, and one side of the baffle contacting the cutter.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: When in use, the aging-resistant layer can effectively absorb ultraviolet rays, and the antioxidant masterbatch in the aging-resistant layer can inhibit the oxidation of the PET substrate, significantly improving the aging resistance of the PET sheet. The reinforcing layer can enhance the mechanical properties of the PET sheet, making the PET sheet more durable. The connecting mechanism enables a detachable connection between the cutter and the adjustment mechanism, facilitating disassembly, sharpening, or replacement of the cutter when it becomes dull after prolonged use, thus ensuring the subsequent cutting effect. At the same time, the combined use of the adjustment mechanism and the height adjustment mechanism allows for adjustment of the horizontal and vertical positions of the cutter to adapt to the cutting requirements of sheets of different sizes, thereby helping to improve the applicability of the cutting device for processing aging-resistant PET sheets. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the aging-resistant PET sheet of this utility model;

[0022] Figure 2 This is a schematic diagram of the edge-cutting device for processing aging-resistant PET sheets according to this utility model;

[0023] Figure 3 This is a partial structural schematic diagram of the edge-cutting device for processing aging-resistant PET sheets according to this utility model;

[0024] Figure 4This is an exploded view of the cutter and connecting mechanism of the edge-cutting device for processing aging-resistant PET sheets according to this utility model.

[0025] In the diagram: 100, sheet body; 110, PET substrate; 120, aging-resistant layer; 130, reinforcing layer; 200, support mechanism; 210, base plate; 220, first bracket; 230, second bracket; 300, winding mechanism; 310, guide roller; 320, first winding roller; 330, second winding roller; 340, motor; 400, cutter; 410, protruding strip; 500, spacing adjustment mechanism; 510, bidirectional screw; 520, screw sleeve; 530, guide rod; 540, guide sleeve; 600, height adjustment mechanism; 610, through hole; 620, support rod; 630, movable plate; 700, connecting mechanism; 710, mounting block; 720, slot; 730, groove; 740, baffle; 800, handwheel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figure 1 This utility model provides a technical solution: an aging-resistant PET sheet, including a sheet body 100, the sheet body 100 including a PET substrate 110, an aging-resistant layer 120 laminated on the top of the PET substrate 110, and a reinforcing layer 130 laminated on the bottom of the PET substrate 110; the aging-resistant layer 120 is made of nano-titanium dioxide and antioxidant masterbatch, and the reinforcing layer 130 is a glass fiber reinforced polyester film. The nano-titanium dioxide can effectively absorb ultraviolet rays, and the antioxidant masterbatch can inhibit the oxidation of the PET substrate 110, significantly improving the aging resistance of the PET sheet. Utilizing the high strength characteristics of glass fiber, the mechanical properties of the PET sheet are enhanced, making the PET sheet more durable.

[0029] Example 2

[0030] Please see Figure 2-4This embodiment provides a trimming device for processing aging-resistant PET sheets, including a support mechanism 200 and two inclined cutters 400. The support mechanism 200 is provided with a winding mechanism 300 for winding the sheet body 100. The cutters 400 contact the winding mechanism 300 and are used to trim the sheet body 100. The support mechanism 200 is provided with a spacing adjustment mechanism 500 for adjusting the distance between the two cutters 400 and a height adjustment mechanism 600 for adjusting the distance between the cutters 400 and the winding mechanism 300. A connecting mechanism 700 for detachable connection is provided between the cutters 400 and the spacing adjustment mechanism 500. The cutters 400 are close to the first One end of the take-up roller 320 is lower than the other end, which ensures the smooth conveying of the sheet body 100 and also allows the cutter 400 to fit more closely with the sheet body 100. The connecting mechanism 700 includes a mounting block 710 located below the adjusting mechanism 500. The bottom of the mounting block 710 has a slot 720. The top of the cutter 400 is inserted into the inner cavity of the slot 720. Both sides of the surface of the cutter 400 are integrally formed with protrusions 410. Both sides of the inner cavity of the slot 720 have grooves 730 that are adapted to the protrusions 410. The protrusions 410 are engaged in the inner cavity of the grooves 730. The mounting block 710 is provided with a positioning element for limiting the position of the cutter 400.

[0031] Working principle: Rotating one of the support rods 620 causes the movable plate 630 on its surface to slide upward within the corresponding through hole 610 under the action of the thread. The movable plate 630 drives the adjusting mechanism 500, the connecting mechanism 700, the cutter 400, and the other movable plate 630 to move upward synchronously until the maximum limit is reached. One end of the sheet body 100 is passed through the gap between the guide roller 310 and the cutter 400 and fixed on the first take-up roller 320, while one end of the waste edge is fixed on the second take-up roller 330. Rotating the bidirectional screw 510 causes the two threaded sleeves 520 on its surface to move towards or away from each other. The threaded sleeves 520 drive the guide sleeve 540 to slide on the surface of the guide rod 530. The threaded sleeves 520 also drive the connecting mechanism 700 and the cutter 400 to move synchronously, moving the two cutters 400 to the appropriate position according to the width of the sheet body 100. Then, rotating one of the support rods 620 in the opposite direction causes the adjusting mechanism 700, the connecting mechanism 700, and the cutter 400 to move synchronously according to the width of the sheet body 100. The thickness of the sheet 100 is adjusted so that the cutter 400 is moved downwards to an appropriate position. The motor 340 is then started, causing its output shaft to drive the first take-up roller 320 to rotate. The first take-up roller 320, via a pulley and belt, drives the second take-up roller 330 to rotate synchronously. This allows for the winding of the sheet body 100 and the waste edges, and the use of the cutter 400 to trim the edges of the sheet body 100 during the winding process. When the cutter 400 becomes dull after prolonged use, one of its supports is rotated... The lever 620 moves the cutter 400 upward, loosens the bolt, and moves the baffle 740 so that it rotates around the bolt until it disengages from the surface of the cutter 400. The cutter 400 is then moved along the inner cavity of the slot 720, causing the cutter 400 to slide along the protrusion 410 in the inner cavity of the groove 730 until the cutter 400 disengages from the inner cavity of the slot 720. This completes the disassembly of the cutter 400, at which point it can be sharpened or replaced.

[0032] Beneficial effects: The connecting mechanism 700 enables a detachable connection between the cutter 400 and the adjusting mechanism 500, facilitating disassembly, sharpening, or replacement of the cutter 400 when it becomes dull after prolonged use, thus ensuring the subsequent cutting effect of the cutter 400. At the same time, the coordinated use of the adjusting mechanism 500 and the height adjusting mechanism 600 allows for adjustment of the horizontal and vertical positions of the cutter 400 to meet the cutting requirements of sheet bodies 100 of different sizes, thereby helping to improve the applicability of this cutting device for aging-resistant PET sheet processing.

[0033] Example 3

[0034] Please see Figure 2-4 The edge-cutting device for processing aging-resistant PET sheets provided in this embodiment differs from that in Embodiment 2 in that:

[0035] The support mechanism 200 includes a base plate 210. Two first brackets 220 and a second bracket 230 are sequentially and fixedly connected to the top of the base plate 210 along the conveying direction. A winding mechanism 300 is located between the first brackets 220 and the second brackets 230. A cutter 400 and a spacing adjustment mechanism 500 are both located between the two first brackets 220. A height adjustment mechanism 600 is located on the first bracket 220. This design provides an installation foundation for the winding mechanism 300, the cutter 400, the spacing adjustment mechanism 500, the height adjustment mechanism 600, and the connecting mechanism 700.

[0036] The winding mechanism 300 includes a guide roller 310 rotatably connected between two first supports 220 via bearings. A first winding roller 320 and a second winding roller 330 are rotatably connected between two second supports 230 from top to bottom via bearings. A motor 340 is mounted on one side of one of the second supports 230. The output shaft of the motor 340 is fixedly connected to the first winding roller 320. The first winding roller 320 and the second winding roller 330 are connected by a pulley and belt drive. With this design, starting the motor 340 drives the first winding roller 320 and the second winding roller 330 to rotate synchronously. This provides a stable and uniform conveying force to the sheet body 100 while automatically winding up the cut sheet body 100 and waste edges for subsequent unified processing.

[0037] The spacing adjustment mechanism 500 includes a bidirectional screw 510 movably connected between two first supports 220 and located directly above the guide roller 310. Both sides of the bidirectional screw 510 are threaded with sleeves 520, which correspond one-to-one with the mounting blocks 710. The sleeves 520 are fixedly connected to the top of the mounting blocks 710. A limiting element for limiting the movement of the sleeves 520 is also provided between the two first supports 220. With this design, by rotating the bidirectional screw 510, the two sleeves 520 can be moved towards or away from each other under the action of the threads, thereby adjusting the spacing between the two cutters 400 to accommodate sheet bodies 100 of different widths.

[0038] The limiting component includes a guide rod 530 arranged parallel to the bidirectional screw 510. Guide sleeves 540 are slidably sleeved on both sides of the guide rod 530 surface. The guide sleeves 540 and threaded sleeves 520 are arranged in a one-to-one correspondence, and the guide sleeves 540 are fixedly connected to the top of the threaded sleeves 520. This design allows the threaded sleeves 520 to slide on the surface of the bidirectional screw 510 as the threaded sleeves 520 move, thus preventing the threaded sleeves 520 from rotating synchronously with the bidirectional screw 510 and ensuring that the threaded sleeves 520 can move stably along the axial direction of the bidirectional screw 510.

[0039] The height adjustment mechanism 600 includes a through hole 610 formed in the first bracket 220. A support rod 620 is provided inside the through hole 610, and a movable plate 630 is movably fitted onto the surface of the support rod 620. The bottom end of one support rod 620 is rotatably connected to the inner wall of the corresponding through hole 610 via a bearing, and it is threadedly connected to the corresponding movable plate 630. Both ends of the other support rod 620 are fixedly connected to the inner wall of the corresponding through hole 610, and it is slidably connected to the corresponding movable plate 630. A bidirectional screw 510 is rotatably connected between the two movable plates 630 via a bearing, and a guide rod 530 is fixedly connected between the two movable plates 630. With this design, by rotating one of the support rods 620, the movable plate 630, the height adjustment mechanism 500, the connecting mechanism 700, and the cutter 400 can be moved up and down under the action of the screw thread, making it suitable for sheet body 100 of different thicknesses.

[0040] One end of the groove 730 is open, and the other end of the groove 730 is closed, so that the cutter 400 can be inserted into one end of the groove 730, and the positioning member can block the open end.

[0041] The positioning component includes a baffle 740 located at the opening of the groove 730. The baffle 740 is bolted to the mounting block 710, and one side of the baffle 740 contacts the cutter 400. This design prevents the cutter 400 from detaching from the inner cavity of the slot 720, ensuring that the cutter 400 remains stable within the slot 720 without wobbling or detachment. The top end of one of the support rods 620 extends movably to the top of the corresponding first bracket 220, and a conveniently rotating handwheel 800 is fixedly connected to its end and the surface of the bidirectional screw 510.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting device for processing aging-resistant PET sheets, characterized in that: The device includes a support mechanism and two cutters. The support mechanism has a winding mechanism for winding the sheet material. The cutters contact the winding mechanism and are used to trim the edges of the sheet material. The support mechanism also includes a spacing adjustment mechanism for adjusting the distance between the two cutters and a height adjustment mechanism for adjusting the distance between the cutters and the winding mechanism. A connecting mechanism for detachable connection is provided between the cutters and the spacing adjustment mechanism. The connecting mechanism includes a mounting block located below the adjusting mechanism. The bottom of the mounting block has a slot, and the top of the cutter is inserted into the inner cavity of the slot. Both sides of the surface of the cutter are integrally formed with protrusions. Both sides of the inner cavity of the slot have grooves that are adapted to the protrusions. The protrusions are engaged in the inner cavity of the grooves. The mounting block is provided with a positioning element for limiting the position of the cutter. The support mechanism includes a base plate, on the top of the base plate and along the conveying direction, two first supports and a second support are fixedly connected in sequence, the winding mechanism is located between the first supports and the second supports, the cutter and the distance adjustment mechanism are both located between the two first supports, and the height adjustment mechanism is located on the first support. The winding mechanism includes a guide roller rotatably connected between two first supports. A first winding roller and a second winding roller are rotatably connected between the two second supports from top to bottom. A motor is installed on one side of one of the second supports. The output shaft of the motor is fixedly connected to the first winding roller. The first winding roller and the second winding roller are connected by a pulley and belt drive.

2. The edge-cutting device for processing aging-resistant PET sheets according to claim 1, characterized in that: The adjusting mechanism includes a bidirectional screw that is movably connected between two first supports and located directly above the guide roller. Both sides of the surface of the bidirectional screw are threaded with screw sleeves. The screw sleeves are arranged in a one-to-one correspondence with the mounting blocks, and the screw sleeves are fixedly connected to the top of the mounting blocks. A limiting member for limiting the screw sleeves is also provided between the two first supports.

3. The edge-cutting device for processing aging-resistant PET sheets according to claim 2, characterized in that: The limiting component includes a guide rod arranged parallel to the bidirectional screw, and guide sleeves are slidably sleeved on both sides of the guide rod surface. The guide sleeves are arranged in a one-to-one correspondence with the screw sleeves, and the guide sleeves are fixedly connected to the top of the screw sleeves.

4. The edge-cutting device for processing aging-resistant PET sheets according to claim 3, characterized in that: The height adjustment mechanism includes a through hole opened on the first bracket. The inner cavity of the through hole is provided with a support rod. A movable plate is movably sleeved on the surface of the support rod. The bottom end of one of the support rods is rotatably connected to the inner wall of the corresponding through hole and is threadedly connected to the corresponding movable plate. Both ends of the other support rod are fixedly connected to the inner wall of the corresponding through hole and are slidably connected to the corresponding movable plate. A bidirectional screw is rotatably connected between the two movable plates, and a guide rod is fixedly connected between the two movable plates.

5. The edge-cutting device for processing aging-resistant PET sheets according to claim 3, characterized in that: One end of the groove is open, and the other end of the groove is closed, and the positioning member can cover the open end.

6. The edge-cutting device for processing aging-resistant PET sheets according to claim 5, characterized in that: The positioning element includes a baffle plate located at the opening of the groove. The baffle plate is connected to the mounting block by bolts, and one side of the baffle plate is in contact with the cutter.

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