Shaping device for improving flatness of polyester PET sheet

Abstract

The invention discloses a shaping device for improving the flatness of polyester PET sheets, and relates to the technical field of polyester PET sheets, the shaping device comprises a machine body and a leveling component, the top of the machine body is provided with the leveling component, and the leveling component comprises a plurality of rollers; a controller is fixedly installed on one side of the machine body, a fixing frame is fixedly installed on the top of the leveling component, a plurality of fixing plates are arranged at the bottom, close to the inner side, of the fixing frame, and each fixing plate is located on the top of the corresponding roller. Polishing abrasive paper can be driven to make contact with all the rollers by rotating the screw, the rollers can be automatically polished through the abrasive paper by controlling the rollers to rotate, and therefore the smoothness of the surfaces of the rollers is improved, the flatness of subsequent leveling of polyester PET sheets can be improved, and the production efficiency of the polyester PET sheets is improved. And by arranging the limiting component, the polishing effect can be effectively prevented from being affected by deviation or separation of the polishing abrasive paper and the contact plate, and the subsequent leveling flatness of the PET sheet is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyester (PET) sheets, and in particular to a shaping device for improving the flatness of polyester (PET) sheets. Background Art

[0002] Polyester PET sheet, as a thermoplastic environmentally friendly plastic product, has a wide range of applications and excellent performance characteristics. The application fields of PET sheet are very wide, mainly including: packaging industry, electrical insulation materials, sheet base and base band, metallized film, blow molding products and electronic product shells, etc. Polyester PET sheet plays an important role in modern industry with its excellent performance characteristics and wide application fields. With the continuous advancement of technology and the improvement of consumer requirements for product quality, the production process and performance of PET sheet will continue to be optimized and improved.

[0003] PET sheets with high flatness can show better physical properties in subsequent processing and use, such as better bending resistance, higher transparency and more uniform thickness. The flatness adjustment process of polyester PET sheets is a delicate operation involving multiple links and parameters. Generally, a three-roll calender is used to flatten polyester PET sheets. It is necessary to comprehensively consider multiple links such as material selection, extruder and mold adjustment, cooling and pressing, post-processing, etc., and pay attention to key issues such as temperature control, pressure and speed adjustment, environmental control, equipment maintenance, quality control and testing.

[0004] However, after the existing three-roll calender has leveled the polyester PET sheet for many times, scratches or protrusions may appear on the roller due to the adhesion of particulate impurities on the surface of the roller or the wear of the roller itself, which may easily affect the leveling effect of the polyester PET sheet. Therefore, it is necessary to propose a shaping device for improving the flatness of the polyester PET sheet to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide a shaping device for improving the flatness of polyester PET sheets to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A shaping device for improving the flatness of polyester (PET) sheets comprises a machine body and a flattening component, wherein the top of the machine body is provided with the flattening component, and the flattening component comprises a plurality of rollers; a controller is fixedly installed on one side of the machine body, a fixing frame is fixedly installed on the top of the flattening component, a plurality of fixing plates are arranged at the bottom of the fixing frame near the inner side, each fixing plate is respectively located at the top of each roller, a plurality of screw rods are threadedly installed on the inner side of the fixing frame, each screw rod extends to the bottom of the fixing frame, and is respectively rotatably connected to the top of each fixing plate through a bearing, each screw rod extends to the top of the fixing frame, and a hand wheel is fixedly installed on the top of each screw rod, a contact plate is arranged at the bottom of each fixing plate, polishing sandpaper is attached to the outer surface of the bottom of each contact plate, and limiting components are arranged at both ends of each fixing plate near the two sides, and each limiting component is respectively used for limiting each polishing sandpaper.

[0008] After the roller has been used for a period of time, the screw can be rotated to drive the fixed plate to move downward, and at the same time drive the contact plate and the polishing sandpaper to continuously approach the roller, so that the polishing sandpaper and the roller can fit together. The roller is driven to rotate by the leveling component, which can continuously generate friction between the roller and the polishing sandpaper, so that the outer surface of the roller can be polished with the polishing sandpaper, thereby improving the smoothness of the outer surface of the roller and improving the flatness of the subsequent leveling of the polyester PET sheet. The contact area between the operator's hand and the screw can be expanded by installing a hand wheel, so that the operator can manually rotate the screw. In the process of polishing the roller, the polishing sandpaper can be squeezed and limited by setting a limiting component, thereby effectively preventing the polishing sandpaper from deviating or detaching from the contact plate, thereby avoiding affecting the effect of roller polishing and further improving the flatness of the subsequent leveling of the polyester PET sheet.

[0009] A further improvement of the technical solution of the present invention is that each limiting component includes a connecting rod, each connecting rod is respectively slidably connected to the inside of each fixed plate, a disc is fixedly installed on the surface of the inner end of each connecting rod, a spring is fixedly installed on the outer end of each disc on the periphery of each connecting rod, and the surface of the outer end of each spring is respectively fixedly connected to the inner wall of each fixed plate, each connecting rod passes through the outer end of each fixed plate, and is respectively fixedly installed with a connecting plate, and a baffle is fixedly installed on the inner end of each connecting plate at the bottom of each connecting rod.

[0010] The above technical solution is adopted. In this solution, the elastic force of the spring itself can form a thrust toward the inner end of each disc, and the connecting rod and the connecting plate can be pulled toward the inner end at the same time, so that the baffle can be used to squeeze and limit the polishing sandpaper from the outer end, thereby effectively preventing the polishing sandpaper from deviating or detaching from the contact plate during the polishing of the roller, thereby affecting the polishing effect of the roller, and further improving the subsequent flatness of the polyester PET sheet.

[0011] A further improvement of the technical solution of the present invention is that a non-slip pad is attached to the surface of the inner end of each baffle, and each non-slip pad is tightly fitted to the surface of the outer side of each polishing sandpaper.

[0012] The above-mentioned technical solution is adopted. In this solution, by attaching an anti-slip pad to the inner end of each baffle, the friction between the baffle and the contact surface of the polishing sandpaper can be increased, thereby improving the effect of the baffle on squeezing and limiting the polishing sandpaper from the outer end, and further preventing the polishing sandpaper from deviating or detaching from the contact plate during the roller polishing process.

[0013] A further improvement of the technical solution of the present invention is that a pull block is fixedly installed on the surface of the outer end of each connecting plate.

[0014] The above technical solution is adopted. In this solution, by installing a pulling block, the contact area between the operator's hand and each connecting plate can be increased, so that the operator can pull the connecting plate toward the outside, and at the same time drive the anti-slip pad and the polishing sandpaper to separate, so that the operator can tear the polishing sandpaper off the outer surface of the contact plate and replace the polishing sandpaper, thereby avoiding the polishing effect of the polishing sandpaper being reduced after repeated use, thereby further improving the polishing effect of the polishing sandpaper on the outer surface of the roller.

[0015] A further improvement of the technical solution of the present invention is that a limiting plate is provided on the outer side of each connecting plate, a T-shaped block is fixedly installed on the surface of the outer end of each fixed plate at the top and bottom of each connecting rod, a sliding groove matching the shape of each T-shaped block is opened on the inner wall of each limiting plate, and each T-shaped block is slidably connected to each sliding groove respectively.

[0016] The above-mentioned technical solution is adopted. In this solution, after pulling the connecting plate toward the outer end, the limit plate is moved toward the inner end of the connecting plate so that the limit plate can be stuck between the connecting plate and the fixed plate, thereby limiting the baffle. There is no need for the operator to manually pull the pull block toward the outer end all the time, and it is inconvenient to disassemble and replace the polishing sandpaper. By installing the T-shaped block, the sliding trajectory of the limit plate at the outer end of the fixed plate can be guided and limited, preventing the limit plate from falling off and being lost, thereby ensuring the integrity of the device.

[0017] A further improvement of the technical solution of the present invention is that a paddle is fixedly mounted on the surface of the outer end of each limiting plate.

[0018] The above technical solution is adopted. In this solution, the contact area between the operator's hand and the limit plate can be enlarged by installing the paddle, so that the operator can manually paddle the limit plate to move the limit plate.

[0019] A further improvement of the technical solution of the present invention is that a pressure detector is fixedly installed on the top of each contact plate, and the top of each pressure detector is fixedly connected to the surface of the bottom of each fixed plate.

[0020] The above technical solution is adopted. In this solution, when the polishing sandpaper contacts the surface of the roller, the contact plate can be squeezed. At the same time, the pressure on the contact plate can be detected by installing a pressure detector, and the operator can know the detection result of the pressure detector through the display screen of the controller, so as to detect the pressure exerted on the polishing sandpaper by the contact plate, thereby preventing the pressure between the polishing sandpaper and the roller from being too large, which may cause excessive wear of the roller polishing, thereby affecting the polishing effect of the roller.

[0021] A further improvement of the technical solution of the present invention is that a guide rod is slidably penetrated inside the fixing frame outside each screw rod, and the bottom of each guide rod is fixedly connected to the surface of the top of each fixing plate.

[0022] The above-mentioned technical solution is adopted. In this solution, in the process of driving the fixed plate to move by rotating the screw, the guide rod can be driven to slide along the inside of the fixed frame. By installing the guide rod, the sliding trajectory of the fixed plate can be guided and limited, thereby ensuring that the fixed plate can maintain linear movement and ensuring that the polishing sandpaper can fit normally with the roller.

[0023] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0024] 1. The present invention provides a shaping device for improving the flatness of polyester PET sheets. After the roller has been used for a period of time, the screw can be used to drive the polishing sandpaper to continuously approach the roller, and then the roller is controlled to rotate, so that the outer surface of the roller can be polished by the polishing sandpaper, thereby improving the smoothness of the outer surface of the roller, and then improving the flatness of the subsequent leveling of the polyester PET sheet.

[0025] 2. The present invention provides a shaping device for improving the flatness of polyester PET sheets. Through the mutual cooperation between the limiting components, a spring can be used to form a thrust toward the inner end of each disc, so that the baffle plate can be used to squeeze and limit the polishing sandpaper from the outer end, thereby effectively preventing the polishing sandpaper from deviating or detaching from the contact plate during the polishing of the roller, thereby avoiding affecting the effect of the roller polishing, and further improving the flatness of the subsequent leveling of the polyester PET sheet.

[0026] 3. The present invention provides a shaping device for improving the flatness of polyester PET sheets. By installing a pressure detector, the pressure on the contact plate and the polishing sandpaper can be detected. When the polishing sandpaper contacts the surface of the roller, the contact plate can be squeezed to ensure that the pressure between the polishing sandpaper and the roller is kept in a stable range, thereby preventing the pressure between the polishing sandpaper and the roller from being too large or too small to affect the polishing effect of the roller, and further improving the flatness of the subsequent leveling of the polyester PET sheet.

[0027] 4. The present invention provides a shaping device for improving the flatness of polyester PET sheets. By arranging an anti-slip pad, the friction between the baffle and the contact surface of the polishing sandpaper can be increased, thereby improving the effect of the baffle on squeezing and limiting the polishing sandpaper from the outer end, thereby further preventing the polishing sandpaper from deviating or detaching from the contact plate during the roller polishing process, and further improving the flatness of the subsequent leveling of the polyester PET sheet.

[0028] 5. The present invention provides a shaping device for improving the flatness of polyester PET sheets. Through the cooperation between the limit plate and the T-shaped block, after the connecting plate is pulled toward the outside, the limit plate can be clamped between the connecting plate and the fixed plate. The baffle can be limited without the operator manually pulling the pull block toward the outside, thereby facilitating the disassembly and replacement of the polishing sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 A perspective view of the present invention;

[0031] Figure 2 It is a schematic diagram of the local structure of the machine body of the present invention;

[0032] Figure 3 It is a schematic diagram of the local structure of the fixing frame of the present invention;

[0033] Figure 4 It is a schematic diagram of the partial structure of the cross section of the fixing plate of the present invention;

[0034] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0035] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0036] Figure 7 It is a schematic diagram of the partial structure of the connecting plate of the present invention from a side view;

[0037] Figure 8 It is a schematic diagram of the partial structure of the second form of the connecting plate of the present invention from a side view.

[0038] In the figure: 1. body; 101. leveling component; 2. fixing frame; 3. fixing plate; 301. guide rod; 4. controller; 5. polishing sandpaper; 7. limit component; 701. connecting plate; 702. connecting rod; 703. disc; 704. spring; 705. baffle; 706. anti-skid pad; 707. pull block; 8. screw; 801. hand wheel; 9. limit plate; 901. paddle; 10. pressure detector; 11. contact plate; 12. T-block. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with embodiments:

[0040] Example 1

[0041] like Figure 1 , Figure 3 and Figure 4 As shown, the present invention provides a shaping device for improving the flatness of polyester PET sheets, comprising a body 1 and a flattening component 101, wherein the top of the body 1 is provided with the flattening component 101, and the flattening component 101 includes a plurality of rollers; a controller 4 is fixedly installed on one side of the body 1, a fixing frame 2 is fixedly installed on the top of the flattening component 101, and a plurality of fixing plates 3 are arranged near the bottom of the inner side of the fixing frame 2, and each fixing plate 3 is respectively located at the top of each roller, and a plurality of screw rods 8 are threadedly installed on the inner side of the fixing frame 2, and each screw rod 8 extends to the bottom of the fixing frame 2 and is respectively rotatably connected to the top of each fixing plate 3 through a bearing, and each screw rod 8 extends to the top of the fixing frame 2, and a hand wheel 801 is fixedly installed on the top of each screw rod 8, and a contact plate 11 is arranged at the bottom of each fixing plate 3, and a polishing sandpaper 5 is attached to the outer surface of the bottom of each contact plate 11, and a limiting component 7 is arranged at both ends of each fixing plate 3 near both sides, and each limiting component 7 is respectively used for limiting each polishing sandpaper 5.

[0042] In this embodiment, after the roller has been used for a period of time, the screw 8 is rotated to drive the fixed plate 3 to move downward, and at the same time drive the contact plate 11 and the polishing sandpaper 5 to continuously approach the roller, so that the polishing sandpaper 5 can fit the roller, and the roller is driven to rotate by the leveling component 101, so that friction can be continuously generated between the roller and the polishing sandpaper 5, so that the outer surface of the roller can be polished by the polishing sandpaper 5, thereby improving the smoothness of the outer surface of the roller and improving the flatness of the subsequent leveling of the polyester PET sheet. The hand wheel 801 can be installed to expand the contact area between the operator's hand and the screw 8, so that the operator can manually rotate the screw 8. In the process of polishing the roller, the limiting component 7 can be set to squeeze and limit the polishing sandpaper 5, thereby effectively preventing the polishing sandpaper 5 from deviating or detaching from the contact plate 11, thereby avoiding affecting the effect of roller polishing and further improving the flatness of the subsequent leveling of the polyester PET sheet.

[0043] Example 2

[0044] like Figure 1 , Figure 4 and Figure 5 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, each limiting component 7 includes a connecting rod 702, each connecting rod 702 is respectively slidably connected to the inside of each fixed plate 3, a disc 703 is fixedly installed on the surface of the inner end of each connecting rod 702, a spring 704 is fixedly installed on the outer end of each disc 703 outside each connecting rod 702, and the surface of the outer end of each spring 704 is respectively fixedly connected to the inner wall of each fixed plate 3, each connecting rod 702 passes through the outer end of each fixed plate 3, and is respectively fixedly installed with a connecting plate 701, a baffle 705 is fixedly installed on the inner end of each connecting plate 701 at the bottom of each connecting rod 702, and an anti-skid pad 706 is attached to the surface of the inner end of each baffle 705, each anti-skid pad 706 is respectively tightly fitted with the outer surface of each polishing sandpaper 5, and a pull block 707 is fixedly installed on the surface of the outer end of each connecting plate 701.

[0045] In this embodiment, the elastic force of the spring 704 itself can form a thrust toward the inner end of each disc 703, and at the same time, the connecting rod 702 and the connecting plate 701 can be pulled toward the inner end, so that the baffle plate 705 can be used to squeeze and limit the polishing sandpaper 5 from the outer end, thereby effectively preventing the polishing sandpaper 5 from deviating or detaching from the contact plate 11 during the roller polishing process, thereby affecting the roller polishing effect, and further improving the subsequent flatness of the polyester PET sheet; by attaching an anti-skid pad 706 to the inner end of each baffle plate 705, the friction between the contact surface of the baffle plate 705 and the polishing sandpaper 5 can be increased, thereby increasing the baffle plate 705 from The outer end squeezes and limits the polishing sandpaper 5, further preventing the polishing sandpaper 5 from being offset or separated from the contact plate 11 during the polishing of the roller; by installing the pull block 707, the contact area between the operator's hand and each connecting plate 701 can be increased, so that the operator can pull the connecting plate 701 toward the outer end, and at the same time drive the anti-slip pad 706 to separate from the polishing sandpaper 5, so that the operator can tear the polishing sandpaper 5 from the outer surface of the contact plate 11 and replace the polishing sandpaper 5, thereby preventing the polishing effect of the polishing sandpaper 5 from being reduced after repeated use, thereby further improving the polishing effect of the polishing sandpaper 5 on the outer surface of the roller.

[0046] Example 3

[0047] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, on the basis of Example 2, the present invention provides a technical solution: preferably, a limiting plate 9 is provided on the outer side of each connecting plate 701, a T-shaped block 12 is fixedly installed on the surface of the outer end of each fixing plate 3 at the top and bottom of each connecting rod 702, and a sliding groove matching the shape of each T-shaped block 12 is opened on the inner wall of each limiting plate 9, and each T-shaped block 12 is slidably connected to each sliding groove, and a paddle 901 is fixedly installed on the surface of the outer end of each limiting plate 9.

[0048] In this embodiment, after pulling the connecting plate 701 toward the outer end, the limiting plate 9 is moved toward the inner end of the connecting plate 701 so that the limiting plate 9 can be stuck between the connecting plate 701 and the fixed plate 3, so that the baffle 705 can be limited. There is no need for the operator to manually pull the pull block 707 toward the outer end all the time, which is inconvenient for disassembling and replacing the polishing sandpaper 5. By installing the T-shaped block 12, the sliding trajectory of the limiting plate 9 at the outer end of the fixed plate 3 can be guided and limited to prevent the limiting plate 9 from falling off and being lost, thereby ensuring the integrity of the device; by installing the paddle 901, the contact area between the operator's hand and the limiting plate 9 can be expanded, thereby facilitating the operator to manually pry the limiting plate 9 and move the limiting plate 9.

[0049] Example 4

[0050] like Figure 1 , Figure 4 and Figure 7 As shown, on the basis of Example 3, the present invention provides a technical solution: preferably, a pressure detector 10 is fixedly installed on the top of each contact plate 11, and the top of each pressure detector 10 is fixedly connected to the surface of the bottom of each fixed plate 3, and a guide rod 301 is slidably penetrated inside the fixing frame 2 outside each screw rod 8, and the bottom of each guide rod 301 is fixedly connected to the surface of the top of each fixed plate 3.

[0051] In this embodiment, when the polishing sandpaper 5 contacts the surface of the roller, the contact plate 11 can be squeezed, and at the same time, the pressure on the contact plate 11 can be detected by installing the pressure detector 10, so that the pressure on the polishing sandpaper 5 exerted by the contact plate 11 can be detected, and the operator can know the detection result of the pressure detector 10 through the display screen of the controller 4, so as to prevent the excessive squeezing pressure between the polishing sandpaper 5 and the roller from causing excessive polishing wear of the roller, thereby affecting the polishing effect of the roller; in the process of driving the fixed plate 3 to move by rotating the screw 8, the guide rod 301 can be driven to slide along the inside of the fixed frame 2, and the sliding trajectory of the fixed plate 3 can be guided and limited by installing the guide rod 301, thereby ensuring that the fixed plate 3 can maintain linear movement and ensuring that the polishing sandpaper 5 can fit normally with the roller.

[0052] The working principle of the shaping device for improving the flatness of polyester PET sheets will be described in detail below.

[0053] like Figure 1-Figure 8As shown, after the roller has leveled the polyester PET sheet for a period of time, the operator can manually turn the hand wheel 801 to drive the screw 8 to rotate, and at the same time drive the fixed plate 3 and the contact plate 11 to move downward, so that the polishing sandpaper 5 continues to approach the roller, and drives the polishing sandpaper 5 to fit the roller. The pressure detector 10 can be used to detect the pressure of the polishing sandpaper 5 and the contact plate 11 on the roller. The operator can know the detection result of the pressure detector 10 through the display screen of the controller 4 to ensure that the pressure of the polishing sandpaper 5 is within a suitable range. After the adjustment is completed, the operator The roller can be controlled to rotate, so that the outer surface of the roller can be polished with the polishing sandpaper 5, thereby improving the smoothness of the outer surface of the roller and improving the flatness of the subsequent leveling of the polyester PET sheet; after the polishing sandpaper 5 has been used for a period of time, the operator can pull the pull block 707 toward the outer end to facilitate pulling the connecting plate 701, and at the same time drive the anti-slip pad 706 to separate from the polishing sandpaper 5, so that the operator can tear the polishing sandpaper 5 off the outer surface of the contact plate 11 to replace it with a new polishing sandpaper 5, so as to avoid the polishing effect of the polishing sandpaper 5 being reduced after repeated use.

[0054] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A shaping device for improving the flatness of a polyester (PET) sheet, comprising a body (1) and a flattening component (101), wherein the top of the body (1) is provided with the flattening component (101), and the flattening component (101) comprises a plurality of rollers; characterized in that: A controller (4) is fixedly mounted on one side of the machine body (1); a fixing frame (2) is fixedly mounted on the top of the leveling component (101); a plurality of fixing plates (3) are arranged near the bottom of the inner side of the fixing frame (2); each of the fixing plates (3) is located at the top of each roller; a plurality of screw rods (8) are threadedly mounted on the inner side of the fixing frame (2); each of the screw rods (8) extends to the bottom of the fixing frame (2) and is rotatably connected to the top of each fixing plate (3) via a bearing. Each of the screw rods (8) extends to the top of the fixing frame (2), and a hand wheel (801) is fixedly mounted on the top of each of the screw rods (8); a contact plate (11) is arranged at the bottom of each of the fixing plates (3); polishing sandpaper (5) is attached to the outer surface of the bottom of each of the contact plates (11); and each of the fixing plates (3) is provided with a limiting component (7) at both ends thereof, and each of the limiting components (7) is used to limit each of the polishing sandpaper (5).

2. A shaping device for improving the flatness of a polyester PET sheet according to claim 1, characterized in that: Each of the limiting components (7) comprises a connecting rod (702), each of the connecting rods (702) is slidably connected to the inside of each of the fixing plates (3), a disc (703) is fixedly mounted on the surface of the inner end of each of the connecting rods (702), a spring (704) is fixedly mounted on the outer end of each of the discs (703) on the periphery of each of the connecting rods (702), and the surface of the outer end of each of the springs (704) is fixedly connected to the inner wall of each of the fixing plates (3), each of the connecting rods (702) passes through the outer end of each of the fixing plates (3) and is fixedly mounted with a connecting plate (701), and a baffle (705) is fixedly mounted on the inner end of each of the connecting plates (701) at the bottom of each of the connecting rods (702).

3. A shaping device for improving the flatness of a polyester PET sheet according to claim 2, characterized in that: The inner surface of each baffle (705) is attached with an anti-skid pad (706), and each anti-skid pad (706) is tightly fitted with the outer surface of each polishing sandpaper (5).

4. A shaping device for improving the flatness of a polyester PET sheet according to claim 3, characterized in that: A pull block (707) is fixedly mounted on the surface of the outer end of each connecting plate (701).

5. A shaping device for improving the flatness of a polyester PET sheet according to claim 4, characterized in that: A limiting plate (9) is arranged on the outer side of each connecting plate (701), a T-shaped block (12) is fixedly mounted on the surface of the outer end of each fixing plate (3) at the top and bottom of each connecting rod (702), a sliding groove matching the shape of each T-shaped block (12) is opened on the inner wall of each limiting plate (9), and each T-shaped block (12) is slidably connected to each sliding groove.

6. A shaping device for improving the flatness of a polyester PET sheet according to claim 5, characterized in that: A paddle (901) is fixedly mounted on the surface of the outer end of each of the limiting plates (9).

7. A shaping device for improving the flatness of a polyester PET sheet according to claim 1, characterized in that: A pressure detector (10) is fixedly mounted on the top of each contact plate (11), and the top of each pressure detector (10) is fixedly connected to the surface of the bottom of each fixed plate (3).

8. A shaping device for improving the flatness of a polyester PET sheet according to claim 1, characterized in that: A guide rod (301) is slidably inserted into the interior of the fixing frame (2) outside each screw rod (8), and the bottom of each guide rod (301) is fixedly connected to the surface of the top of each fixing plate (3).

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