A TPU composite board and its preparation process

Abstract

The present invention relates to the technical field of plate coating. The application discloses a TPU composite plate and a preparation process thereof, comprising a plate. A TPU film is provided on the outer surface of the plate. A PET film is provided on the outer surface of the TPU film. The material of the TPU film is TPU film, and the material of the PET film is flame-retardant PET film. By covering the outer surface of the plate with the TPU film, the surface of the plate can be fully protected from being scratched due to its excellent wear resistance. The TPU film may be softer than other materials and is suitable for products that need to be bent. The TPU film has good water impermeability and has a good waterproof effect. A layer of PET film is covered on the outside of the TPU film, thereby improving the protection effect of the plate in a high-temperature working environment. The TPU film itself has high light transmittance and will not affect the observation effect of printing on the surface of the plate, thereby improving the practicality of the device.

Description

Technical Field

[0001] The present application relates to the technical field of plate coating, and in particular to a TPU composite plate and a preparation process thereof. Background Art

[0002] The TPU composite board is composed of a base board and a TPU film, and the single-layer TPU film has limited protective effect on the board. In addition, during the TPU lamination process in a vacuum laminating machine, the TPU film is laid flat on the top of the board and fixed. This causes the TPU film to be subjected to tensile stress when it is tightly attached to the top of the board during the vacuum lamination process, resulting in a reduction in the thickness of the TPU film covering the bending area of ​​the board surface, causing a decrease in physical properties, rupture, and a decrease in the protection ability of the board. In this regard, the present application document proposes a TPU composite board and a preparation process thereof, aiming to solve the above-mentioned problems. Summary of the Invention

[0003] This application proposes a TPU composite board and its preparation process, which have the advantages of double-layer coating to improve physical properties, and are used to solve the problem that a single-layer coating has limited protection ability for the board.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a TPU composite board and its preparation process, characterized in that the board, the outer surface of the board is provided with a TPU film, the outer surface of the TPU film is provided with a PET film, the material of the TPU film is TPU film, the material of the PET film is flame-retardant PET film, and the thickness range of the TPU film and the PET film is 0.2mm-0.4mm.

[0005] Furthermore, the preparation device includes a laminating machine, a conveying roller is provided above the laminating machine, a bottom plate is placed above the conveying roller, a connecting plate is fixedly installed on the top of the bottom plate near the end, a pressure chamber is provided on the top of the connecting plate, an air guide hole is provided on the front of the pressure chamber, and the air guide hole is designed to be double-layered, and plywood is provided on the front of the pressure chamber near the middle and top, and the plywood clamps the TPU film and the PET film respectively, and a two-way fan and a connecting pipe port are provided on the top of the pressure chamber near the left end and the middle, the output end of the two-way fan is connected to the connecting pipe port through a pipeline, and the two-way fan can supply air or exhaust air to the connecting pipe port, a circular hole is opened on the front of the connecting plate, and a sliding rod is movably installed inside the circular hole, a limit rod and a baffle are respectively provided on the inner wall of the pressure chamber near one end, a stroke device is movably installed on the outer surface of the limit rod, and the limit rod and the baffle cooperate with each other.

[0006] Furthermore, a placement plate is fixedly installed at the front end of the slide rod, a movable sleeve on the top of the placement plate is provided with an anti-slip device, a plate is placed on the top of the placement plate between the anti-slip devices, a second guide wheel is provided at the bottom of the placement plate, the second guide wheel is in contact with the bottom plate, and lower pressure arms are provided on the movable sleeves on both sides of the placement plate, a fixed frame is movably installed on the inner side of the lower pressure arm, and the fixed frame can slide back and forth, and the number of the fixed frames is two and they are respectively placed above the TPU film and the PET film, and a resistance-increasing device is fixedly installed at the end of the slide rod;

[0007] Specifically, a groove is provided on the inner side of the fixed frame near the end, and the groove cooperates with the pressure chamber.

[0008] Furthermore, when the downward pressing arm rotates, it drives the fixed frame to press downward and clamp the TPU film and the PET film respectively.

[0009] Furthermore, the resistance increasing device includes a transverse rod, a connecting frame is provided on the top of the transverse rod, a spring extrusion rod is provided at the front end of the connecting frame, a resistance increasing plate is fixedly installed at the front end of the spring extrusion rod, and the resistance increasing plate extends from the back of the pressure chamber into the interior.

[0010] Furthermore, the stroke device includes a stroke plate, a side air guide plate is fixedly installed on the right side of the stroke plate, a circular hole is opened on the front side of the stroke plate, and the stroke plate is movably installed with a limit rod through the circular hole, a spring contact rod is movably installed on the front side of the stroke plate near the top and bottom, a first guide wheel is fixedly installed on the front end of the spring contact rod, a mounting bracket is fixedly installed on the back side of the stroke plate, a contact sensor is provided on the front side of the mounting bracket, the position of the contact sensor corresponds to the spring contact rod, a return spring is clamped on the back side of the stroke plate, and one end of the return spring is connected to the inner wall of the pressure chamber.

[0011] Specifically, the first guide wheel is in contact with the resistance increasing plate.

[0012] Furthermore, the anti-slip device includes an anti-slip plate, and wind-receiving plates are fixedly installed on the top of the anti-slip plate near both ends.

[0013] A method for preparing a TPU composite plate comprises the following steps:

[0014] S1. Place the plate on top of the placement plate, clamp the TPU film and PET film with the clamping plate, and send the bottom plate into the laminating machine through the conveyor roller;

[0015] S2. The bidirectional fan runs and pressurizes the interior of the pressure chamber through the connecting pipe port. The pressure intensity continues to increase, forming a negative pressure so that the TPU film and PET film are bonded to the plate and deformed;

[0016] S3: During the bidirectional fan pressurization process, the stroke device is pushed to move until the first guide wheel contacts one end of the inner wall of the pressure chamber. At this time, the bidirectional fan pressurization intensity stops increasing and remains stable.

[0017] S4. When the bidirectional fan is pressurized, the airflow acts on the surface of the plate and pushes the placement plate to move, and the sliding rod transmission increases the extrusion strength of the resistance-enhancing plate on the stroke device;

[0018] S5, the mechanical drive lower pressing arm rotates and drives the fixed frame to press down to clamp the TPU film and the PET film respectively;

[0019] S6. The two-way fans are running and reducing pressure, and the negative pressure is used to press the TPU film and PET film tightly against the sheet material and achieve lamination.

[0020] This application has the following beneficial effects.

[0021] Covering the surface of the plate with TPU film and PET film can fully protect the surface of the plate from being scratched, and the TPU film has good water-impermeability and has a good waterproof effect. Covering the outside of the TPU film with a layer of PET film can improve the protection effect of the plate in a high-temperature working environment, and it itself has high light transmittance. The device can simplify the operation process and improve production efficiency by covering the TPU film and PET film on the surface of the plate. In addition, during the operation of the two-way fan, air flow is generated between the placement plate and the TPU film and between the TPU film and the PET film through the air guide holes, and the TPU film and the PET film are deformed under the action of negative pressure, and pre-fitted with the top shape of the plate, so that during the subsequent vacuum lamination, the tensile stress on the TPU film and the PET film is reduced, and the problem of thinning of the TPU film and the PET film in local positions after lamination is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0023] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a diagram of the structural plate of the present invention;

[0025] Figure 2 It is a structural diagram of the present invention;

[0026] Figure 3 This is the main structure diagram of the present invention;

[0027] Figure 4 This is a front view of the structural support device of the present invention;

[0028] Figure 5 This is a rear view of the structural support device of the present invention;

[0029] Figure 6 This is a diagram of the structural clamping device of the present invention;

[0030] Figure 7 This is a diagram of the structural device of the present invention;

[0031] Figure 8 This is a right side view of the stroke device of the present invention;

[0032] Figure 9 This is a diagram of the structural resistance increasing device of the present invention;

[0033] Figure 10 This is the structural anti-skid device of the present invention.

[0034] In the figure; 1. Laminating machine; 2. Conveying roller; 3. Bottom plate; 4. Connecting plate; 5. Pressure chamber; 6. Air guide hole; 7. Clamp; 8. Two-way fan; 9. Connecting pipe port; 10. Slide rod; 11. Limit rod; 12. Baffle; 13. Stroke device; 131. Stroke plate; 132. Side air guide plate; 133. Spring contact rod; 134. First guide wheel; 135. Mounting bracket; 136. Contact sensor; 137. Return spring; 14. Placement plate; 15. Anti-slip device; 151. Anti-slip plate; 152. Wind receiving plate; 16. Second guide wheel; 17. Lower pressure arm; 18. Fixed frame; 19. Resistance increasing device; 191. Transverse rod; 192. Connecting frame; 193. Spring extrusion rod; 194. Resistance increasing plate; 100. Plate; 101. TPU film; 102. PET film. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] A TPU composite board and its preparation process, please refer to Figure 1 , including a plate 100, a plate 100, the outer surface of the plate 100 is provided with a TPU film 101, the outer surface of the TPU film 101 is provided with a PET film 102, the material of the TPU film 101 is TPU film, the material of the PET film 102 is flame-retardant PET film, and the thickness range of the TPU film 101 and the PET film 102 is 0.2mm-0.4mm.

[0037] By covering the outer surface of the plate 100 with a TPU film 101, due to its excellent wear-resistant properties, the surface of the plate 100 can be fully protected from being scratched. The TPU film may be softer than other materials and is suitable for products that need to be bent. In addition, the TPU film has good water impermeability and has a good waterproof effect. A layer of PET film 102 is covered on the outside of the TPU film 101, thereby improving the protection effect of the plate 100 in a high-temperature working environment. The PET film 102 itself has high light transmittance and will not affect the observation effect of the printing on the surface of the plate 100, thereby improving the practicality of the device.

[0038] See also Figure 2-Figure 5 The preparation device includes a laminating machine 1, a conveying roller 2 is provided above the laminating machine 1, a bottom plate 3 is placed above the conveying roller 2, a connecting plate 4 is fixedly installed on the top of the bottom plate 3 near the end, a pressure chamber 5 is provided on the top of the connecting plate 4, and an air guide hole 6 is provided on the front of the pressure chamber 5. The air guide hole 6 is designed to be double-layered, and a splint 7 is provided on the front of the pressure chamber 5 near the middle and top. The splint 7 clamps the TPU film 101 and the PET film 102 respectively. A two-way fan 8 and a connecting pipe port 9 are provided on the top of the pressure chamber 5 near the left end and the middle. The output end of the connecting pipe port 9 is connected to the two-way fan 8 through a pipeline. A circular hole is opened on the front of the connecting plate 4, and a sliding rod 10 is movably installed inside the circular hole. A limit rod 11 and a baffle 12 are respectively provided on the inner wall of the pressure chamber 5 near one end. A stroke device 13 is movably installed on the outer surface of the limit rod 11, and the limit rod 11 and the baffle 12 cooperate with each other;

[0039] See also Figure 4 The opening area of ​​the air guide holes 6 located in the upper layer is smaller than that of the air guide holes 6 located in the lower layer.

[0040] After the splint 7 fixes the TPU film 101 and the PET film 102, the two-way fan 8 runs and supplies air to the interior of the pressure chamber 5 through the pipe and the connecting pipe port 9, so that the air pressure inside the pressure chamber 5 increases, and is discharged through the air guide holes 6 and generates airflow under the TPU film 101 and the PET film 102. The opening area of ​​the air guide holes 6 on the upper layer is smaller than that of the air guide holes 6 on the lower layer, so that the air flow speed under the TPU film 101 is greater than the air flow speed under the PET film 102, so that the TPU film 101 generates downward pressure under the action of the air pressure difference, so that it can be deformed according to the shape of the top of the plate 100 and achieve fitting, and at the same time, the PET The film 102 will also produce the same deformation. At this time, the lower pressure arm 17 rotates to make the fixed frame 18 clamp the TPU film 101 and the PET film 102. During the subsequent vacuum lamination, the tensile stress on the TPU film 101 and the PET film 102 when they are bonded to the plate 100 is reduced, thereby avoiding the problem that the thickness of the TPU film 101 and the PET film 102 in the local area of ​​the retroperitoneum is reduced due to excessive pulling during lamination, which affects the physical properties and causes the protective performance of the TPU film 101 and the PET film 102 on the plate 100 to decrease after lamination, thereby improving the reliability of the device.

[0041] See also Figure 1 and Figure 6 , a placement plate 14 is fixedly installed at the front end of the slide bar 10, and an anti-slip device 15 is provided on the top movable sleeve of the placement plate 14. A plate 100 is placed on the top of the placement plate 14 between the anti-slip devices 15. A second guide wheel 16 is provided at the bottom of the placement plate 14, and the second guide wheel 16 is in contact with the bottom plate 3. A lower pressure arm 17 is provided on both sides of the placement plate 14. A fixed frame 18 is movably installed on the inner side of the lower pressure arm 17. The fixed frame 18 can slide back and forth. There are two fixed frames 18 and they are respectively placed above the TPU film 101 and the PET film 102. A resistance-increasing device 19 is fixedly installed at the end of the slide bar 10;

[0042] See also Figure 4 and Figure 6 A groove is provided on the inner side of the fixed frame 18 near the end, and the groove cooperates with the pressure chamber 5.

[0043] See also Figure 3 and Figure 6 When the pressing arm 17 rotates, it drives the fixed frame 18 to press down and clamp the TPU film 101 and the PET film 102 respectively.

[0044] When the TPU film 101 and the PET film 102 are bonded to the plate 100 under the action of negative pressure, and the lower pressure arm 17 rotates to fix the TPU film 101 and the PET film 102 by the fixed frame 18, the two-way fan 8 draws out the gas outward, and through the design of the double-layer air guide hole 6, the space between the TPU film 101 and the plate 100, as well as between the TPU film 101 and the PET film 102 are vacuumed, thereby completing the lamination operation and completing the lamination operation of the TPU film 101 and the PET film 102 in one operation, simplifying the operation steps and improving production efficiency.

[0045] See also Figure 3 and Figure 9 The resistance increasing device 19 includes a transverse rod 191, a connecting frame 192 is provided on the top of the transverse rod 191, a spring extrusion rod 193 is provided at the front end of the connecting frame 192, and a resistance increasing plate 194 is fixedly installed at the front end of the spring extrusion rod 193, and the resistance increasing plate 194 extends into the interior from the back of the pressure chamber 5.

[0046] See also Figure 5-Figure 7 The stroke device 13 includes a stroke plate 131, a side air guide plate 132 is fixedly installed on the right side of the stroke plate 131, a round hole is opened on the front of the stroke plate 131, and it is movably installed with the limit rod 11 through the round hole, a spring contact rod 133 is movably installed on the front of the stroke plate 131 near the top and bottom, and a first guide wheel 134 is fixedly installed on the front end of the spring contact rod 133, and a mounting bracket 135 is fixedly installed on the back of the stroke plate 131. A contact sensor 136 is provided on the front of the mounting bracket 135, and the position of the contact sensor 136 corresponds to the spring contact rod 133. A return spring 137 is clamped on the back of the stroke plate 131, and one end of the return spring 137 is connected to the inner wall of the pressure chamber 5.

[0047] In order to ensure that the airflow intensity generated by the operation of the two-way fan 8 is sufficient for the TPU film 101 and the PET film 102 to fit with the top of the plate 100 under the action of negative pressure, when the air pressure inside the pressure chamber 5 increases, the stroke device 13 will be pushed as a whole to move in the direction of the principle baffle 12, and the distance of movement is proportional to the pressure generated inside the pressure chamber 5 after the two-way fan 8 is operated. As the power of the two-way fan 8 continues to increase, the pressure gradually increases, and the first guide wheel 134 will eventually contact the inner wall of the pressure chamber 5, so that the end of the spring contact rod 133 comes into contact with the contact sensor 136, thereby stopping the operating power of the two-way fan 8 from increasing, and stabilizing the airflow at a higher level, avoiding the problem that the TPU film 101 and the PET film 102 cannot fully fit with the top surface structure of the plate 100 due to insufficient negative pressure intensity, thereby providing stability during the operation of the device.

[0048] See also Figure 8-Figure 9, the first guide wheel 134 is in contact with the resistance increasing plate 194 .

[0049] When the number of plates 100 is large, or the volume of plates 100 is large and the top structure is more complex, the plate 100 has an increased effect on hindering the airflow, and the plate 100 cannot move under the action of the wind receiving plate 152. At this time, the sliding rod 10 and the connecting plate 4 are movably installed, so that the plate 100 drives the placement plate 14 to move in the direction of the airflow under the action of the airflow, and through the transmission effect of the transverse rod 191 and the connecting frame 192, the resistance increasing plate 194 is squeezed toward the inside of the pressure chamber 5. Since the resistance increasing plate 194 is in contact with the first guide wheel 134, the resistance of the stroke device 13 as a whole increases during the movement, so that when the first guide wheel 134 is in contact with the inner wall of the pressure chamber 5, the air guide hole 6 is at a higher operating power, so that the airflow intensity provided by the air guide hole 6 is proportional to the number of plates 100 or the volume of the plates 100, and the effect of the device automatically adjusting the airflow intensity is achieved, thereby improving the automation of the device.

[0050] See also Figure 10 The anti-slip device 15 includes an anti-slip plate 151, and a wind-receiving plate 152 is fixedly installed on the top of the anti-slip plate 151 near both ends.

[0051] When the air guide hole 6 sprays air toward the upper area of ​​the base plate 3, the wind receiving plate 152 rotates under the push of the airflow, thereby driving the anti-slip plate 151 to rotate and forming a bulge on the top of the base plate 3, which has an obstructive effect on the plate 100, avoiding the plate 100 from being displaced under the action of the airflow and causing the problem of failure to coat normally, thereby improving the reliability of the device.

[0052] A method for preparing a TPU composite plate comprises the following steps:

[0053] S1. Place the plate 100 on top of the placement plate 14, clamp the TPU film 101 and the PET film 102 with the clamping plate 7, and feed the bottom plate 3 into the laminating machine 1 via the conveying roller 2;

[0054] S2, the bidirectional blower 8 runs and pressurizes the interior of the pressure chamber 5 through the connecting pipe 9, and the pressure intensity is continuously increased, forming a negative pressure so that the TPU film 101 and the PET film 102 are bonded to the plate 100 and deformed;

[0055] S3, during the pressurization process of the bidirectional fan 8, the stroke device 13 is pushed to move until the first guide wheel 134 contacts one end of the inner wall of the pressure chamber 5. At this time, the pressure intensity of the bidirectional fan 8 stops increasing and remains stable;

[0056] S4, when the bidirectional fan 8 is pressurized, the airflow acts on the surface of the plate 100 and pushes the placement plate 14 to move, and the sliding rod 10 is used to increase the squeezing strength of the resistance-increasing plate 194 on the stroke device 13;

[0057] S5, mechanically driving the pressing arm 17 to rotate and drive the fixed frame 18 to press down to clamp the TPU film 101 and the PET film 102 respectively;

[0058] S6. The bidirectional blower 8 operates and reduces pressure, and utilizes negative pressure to make the TPU film 101 and the PET film 102 adhere tightly to the plate 100 and achieve lamination.

[0059] The method of use of the present invention is as follows:

[0060] Before use, the TPU film 101 and the PET film 102 are clamped and connected with the clamping plate 7 respectively, and the PET film 102 is located above the TPU film 101, and then the plate 100 is placed above the placement plate 14. When the number of plates 100 is large, a staggered arrangement is adopted to increase the wind-receiving area. Then, the bottom plate 3 is driven to move to the inside of the laminating machine 1 by the rotation of the conveying roller 2, and then the two-way fan 8 is operated and supplies air to the inside of the pressure chamber 5 through the pipeline and the connecting pipe port 9, so that the air pressure inside the pressure chamber 5 increases, and is discharged through the air guide hole 6 and generates airflow below the TPU film 101 and the PET film 102, and the opening area of ​​the air guide hole 6 on the upper layer is smaller than that on the lower layer, so that the TPU film The air flow velocity under the film 101 is greater than the air flow velocity under the PET film 102, so that the TPU film 101 generates downward pressure under the action of the air pressure difference, so that it can be deformed according to the shape of the top of the plate 100 and fit. At the same time, the PET film 102 will also produce the same deformation. At this time, the lower pressure arm 17 rotates to make the fixed frame 18 clamp the TPU film 101 and the PET film 102. During the subsequent vacuum lamination, the tensile stress on the TPU film 101 and the PET film 102 when they are fitted with the plate 100 is reduced. After the fitting is completed, the lower pressure arm 17 is driven by mechanical means to rotate so that the fixed frame 18 presses down and clamps the TPU film 101 and the PET film 102 to complete the lamination. After clamping, the two-way fan 8 exhausts air outwards. When the TPU film 101 and the PET film 102 are bonded to the plate 100 under the action of negative pressure, and the lower pressure arm 17 rotates to fix the TPU film 101 and the PET film 102 to the plate 100, the two-way fan 8 extracts air outwards at this time. Through the design of the double-layer air guide hole 6, the space between the TPU film 101 and the plate 100, as well as the space between the TPU film 101 and the PET film 102 are vacuumed, thereby completing the lamination and completing the lamination operation of the TPU film 101 and the PET film 102 in one operation. In order to ensure that the airflow intensity generated by the operation of the two-way fan 8 is sufficient for the TPU film 101 and the PET film 102 to bond to the plate 100 under the action of negative pressure, 00 is fitted on the top of the pressure chamber 5. When the air pressure inside the pressure chamber 5 increases, the stroke device 13 is pushed as a whole to move in the direction of the principle baffle 12, and the distance moved is proportional to the pressure generated inside the pressure chamber 5 after the two-way fan 8 is running. As the power of the two-way fan 8 continues to increase, the pressure gradually increases, and the first guide wheel 134 will eventually come into contact with the inner wall of the pressure chamber 5, so that the end of the spring contact rod 133 comes into contact with the contact sensor 136, thereby stopping the increase in the operating power of the two-way fan 8, and stabilizing the airflow at a higher level. When the air guide hole 6 sprays airflow to the upper area of ​​the bottom plate 3, the wind receiving plate 152 rotates under the push of the airflow, thereby driving the anti-slide plate 151 to rotate and forming a bulge on the top of the bottom plate 3.It has an obstruction effect on the plate 100. When the number of plates 100 is large, or the volume of the plates 100 is large and the top structure is more complex, the obstruction effect of the plates 100 on the airflow is enhanced, and the plates 100 cannot move under the action of the wind receiving plate 152. At this time, the sliding rod 10 and the connecting plate 4 are movably installed, so that the plate 100 drives the placement plate 14 to move in the direction of the airflow under the action of the airflow, and through the transmission effect of the transverse rod 191 and the connecting frame 192, the resistance increasing plate 194 is squeezed into the interior of the pressure chamber 5. Since the resistance increasing plate 194 is in contact with the first guide wheel 134, the resistance of the first guide wheel 134 as a whole during the movement of the stroke device 13 is increased, so that when the first guide wheel 134 is in contact with the inner wall of the pressure chamber 5, the air guide hole 6 is at a higher operating power, so that the airflow intensity provided by the air guide hole 6 is proportional to the number of plates 100 or the volume of the plates 100, and the effect of the device automatically adjusting the airflow intensity is achieved.

[0061] The plate 100 after double-layer coating with TPU film 101 and PET film 102 has excellent wear resistance and can fully protect the surface of the plate 100 from being scratched. The TPU film may be softer than other materials and is suitable for products that need to be bent. In addition, the TPU film has good water impermeability and has a good waterproof effect. A layer of PET film 102 is covered on the outside of the TPU film 101, thereby improving the protection effect of the plate 100 in a high-temperature working environment. The PET film 102 itself has high light transmittance and will not affect the observation effect of the printing on the surface of the plate 100.

Claims

1. A device for preparing a TPU composite board, characterized in that: The TPU composite plate comprises a plate (100), the outer surface of the plate (100) is provided with a TPU film (101), the outer surface of the TPU film (101) is provided with a PET film (102), the material of the TPU film (101) is a TPU film, and the material of the PET film (102) is a flame-retardant PET film. The preparation device comprises a laminating machine (1), a conveying roller (2) is provided above the laminating machine (1), a bottom plate (3) is placed above the conveying roller (2), and the top of the bottom plate (3) is located near the end. A connecting plate (4) is fixedly mounted on the upper portion of the pressure chamber (5), a pressure chamber (5) is provided on the top of the connecting plate (4), an air guide hole (6) is provided on the front of the pressure chamber (5), the air guide hole (6) is designed as a double layer, the opening area of ​​the air guide hole (6) on the upper layer is smaller than the air guide hole (6) on the lower layer, a clamping plate (7) is provided on the front of the pressure chamber (5) near the middle and the top, the clamping plate (7) clamps the TPU film (101) and the PET film (102) respectively, and a bidirectional fan (8) is provided on the top of the pressure chamber (5) near the left end and the middle. ) and a connecting pipe port (9), the output end of the connecting pipe port (9) is connected to the two-way fan (8) through a pipeline, a circular hole is opened on the front of the connecting plate (4), and a sliding rod (10) is movably installed inside the circular hole, and a limit rod (11) and a baffle (12) are respectively provided on the inner wall of the pressure chamber (5) near one end, and a stroke device (13) is movably installed on the outer surface of the limit rod (11), and the limit rod (11) and the baffle (12) cooperate with each other, and a placement plate (14) is fixedly installed on the front end of the slide rod (10), and both sides of the placement plate (14) are movably installed. The movable sleeve is provided with a lower pressure arm (17), and a fixed frame (18) is movably installed on the inner side of the lower pressure arm (17), and the fixed frame (18) can slide forward and backward. There are two fixed frames (18) and they are respectively placed above the TPU film (101) and the PET film (102). A groove is provided on the inner side of the fixed frame (18) near the end, and the groove is matched with the pressure chamber (5). When the lower pressure arm (17) rotates, it drives the fixed frame (18) to press down and clamp the TPU film (101) and the PET film (102) respectively.The stroke device (13) includes a stroke plate (131), a side air guide plate (132) is fixedly installed on the right side of the stroke plate (131), a circular hole is opened on the front of the stroke plate (131), and the stroke plate (131) is movably installed with a limit rod (11) through the circular hole, a spring contact rod (133) is movably installed at the position near the top and bottom of the front of the stroke plate (131), and a first guide wheel (134) is fixedly installed at the front end of the spring contact rod (133), a mounting bracket (135) is fixedly installed on the back of the stroke plate (131), and a contact sensor (136) is provided on the front of the mounting bracket (135), and the position of the contact sensor (136) corresponds to the spring contact rod (133), and a return spring (137) is clamped on the back of the stroke plate (131), and one end of the return spring (137) is connected to the inner wall of the pressure chamber (5).

2. The device for preparing a TPU composite board according to claim 1, characterized in that: The top movable sleeve of the placement plate (14) is provided with an anti-slip device (15), a plate (100) is placed at a position between the anti-slip device (15) on the top of the placement plate (14), and a second guide wheel (16) is provided at the bottom of the placement plate (14), and the second guide wheel (16) is in contact with the bottom plate (3).

3. The device for preparing a TPU composite board according to claim 2, characterized in that: A resistance increasing device (19) is fixedly installed at the end of the sliding rod (10), and the resistance increasing device (19) includes a transverse rod (191), a connecting frame (192) is provided on the top of the transverse rod (191), a spring extrusion rod (193) is provided at the front end of the connecting frame (192), and a resistance increasing plate (194) is fixedly installed at the front end of the spring extrusion rod (193), and the resistance increasing plate (194) extends from the back side of the pressure chamber (5) into the interior, and the first guide wheel (134) is in contact with the resistance increasing plate (194).

4. The device for preparing a TPU composite board according to claim 2, characterized in that: The anti-slip device (15) comprises an anti-slip plate (151), and wind-receiving plates (152) are fixedly mounted on the top of the anti-slip plate (151) near both ends.

5. A method for preparing a TPU composite plate, using the device for preparing a TPU composite plate according to any one of claims 1 to 4, comprising the following steps: S1, placing the plate (100) inside a TPU composite plate preparation device, and fixing the TPU film (101) and the PET film (102); S2, using the airflow generated below the TPU film (101) and the PET film (102) to form a negative pressure, so that the TPU film (101) and the PET film (102) are in contact with the outer shape of the plate (100); S3, the wind speed continues to increase until the TPU film (101) and the PET film (102) are completely deformed; S4, clamping and fixing the TPU film (101) and the PET film (102); S5. Using vacuum negative pressure, the TPU film (101) and the PET film (102) are tightly attached to the plate (100) to achieve lamination.

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