TPU (thermoplastic polyurethane) composite board and preparation process thereof

Abstract

The invention relates to the technical field of plate film coating, and discloses a TPU composite plate and a preparation process thereof.The TPU composite plate comprises a plate, a TPU film is arranged on the outer surface of the plate, a PET film is arranged on the outer surface of the TPU film, the TPU film is made of a TPU film, and the PET film is made of a flame-retardant PET film. As the TPU film has excellent wear resistance, the surface of the plate can be fully protected from being scratched, the TPU film is softer than other materials and is suitable for products needing to be bent, the TPU film has good watertightness and has a good waterproof effect, and the PET film is covered on the outer side of the TPU film, so that the TPU film is not prone to being scratched. Therefore, the protection effect on the plate in the high-temperature working environment is improved, the device has high light transmittance, the observation effect on plate surface printing cannot be affected, and the practicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sheet metal coating, and in particular to a TPU composite sheet 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, since the TPU film is laid flat on the top of the board and fixed, during the vacuum lamination process, when the TPU film is in close contact with the top of the board, the TPU film will be subjected to tensile stress, resulting in a decrease in the thickness of the TPU film covered on the bending area of ​​the board surface, causing the problem of decreased physical properties, rupture, and decreased protection 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] The present application proposes a TPU composite board and a preparation process thereof, 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 scheme: 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 arranged above the laminating machine, a bottom plate is placed above the conveying roller, a connecting plate is fixedly installed at a position near the end of the top of the bottom plate, a pressure bin is arranged on the top of the connecting plate, an air guide hole is arranged on the front of the pressure bin, the air guide hole is designed to be double-layered, splints are arranged on the front of the pressure bin near the middle and the top, the splints clamp the TPU film and the PET film respectively, a two-way fan and a connecting pipe port are arranged on the top of the pressure bin 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 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 arranged on the inner wall of the pressure bin 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 bar, an anti-skid device is provided on the top movable sleeve of the placement plate, a plate is placed at a position between the anti-skid devices on the top of the placement plate, a second guide wheel is provided at the bottom of the placement plate, the second guide wheel is in contact with the bottom plate, 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, the fixed frame can slide back and forth, there are two fixed frames 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 bar; Specifically, a groove is provided on the inner side of the fixed frame near the end, and the groove matches the pressure chamber.

[0007] 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.

[0008] 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 side of the pressure chamber into the interior.

[0009] Further, 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 the 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 arranged 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.

[0010] Specifically, the first guide wheel is in contact with the resistance increasing plate.

[0011] Furthermore, the anti-slip device includes an anti-slip plate, and wind receiving plates are fixedly installed at positions near both ends of the top of the anti-slip plate.

[0012] A method for preparing a TPU composite plate comprises the following steps: S1. Place the plate on the 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 conveying roller; S2, the two-way fan runs and pressurizes the interior of the pressure chamber through the connecting pipe port. The pressurization intensity is continuously increased, forming a negative pressure so that the TPU film and PET film are bonded and deformed with the plate; S3, during the pressurization process of the bidirectional fan, the stroke device is pushed to move until the first guide wheel contacts one end of the inner wall of the pressure chamber, at which time the pressurization intensity of the bidirectional fan stops increasing and remains stable; S4, when the two-way 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; S5, mechanically driving the pressing arm to rotate and drive the fixed frame to press down to clamp the TPU film and the PET film respectively; S6. The two-way fan is operated to reduce pressure, and the negative pressure is used to press the TPU film and the PET film against the plate to achieve lamination.

[0013] This application has the following beneficial effects.

[0014] 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, airflow 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-laminated 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 at local positions after lamination is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0016] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 This is a diagram of the structural plate of the present invention; Figure 2 It is a structural diagram of the present invention; Figure 3 It is the main structure diagram of the present invention; Figure 4 It is a front view of the structural bearing device of the present invention; Figure 5 It is a rear view of the structural bearing device of the present invention; Figure 6 This is a diagram of the structural clamping device of the present invention; Figure 7This is the structural stroke device diagram of the present invention; Figure 8 This is the right view of the structural stroke device of the present invention; Fig. 9 This is the structural resistance increasing device diagram of the present invention; Fig.10 This is the anti-slip device of the structure of the present invention.

[0017] In the figure: 1. Film laminating machine; 2. Conveyor roller shaft; 3. Base plate; 4. Connecting plate; 5. Pressure chamber; 6. Air guide hole; 7. Clamping plate; 8. Bidirectional blower; 9. Connecting pipe orifice; 10. Slide bar; 11. Limit bar; 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 inductor; 137. Return spring; 14. Placing plate; 15. Anti-slip device; 151. Anti-slip plate; 152. Wind receiving plate; 16. Second guide wheel; 17. Pressing arm; 18. Fixed frame; 19. Resistance increasing device; 191. Transverse bar; 192. Connecting frame; 193. Spring extrusion rod; 194. Resistance increasing plate; 100. Plate; 101. TPU film; 102. PET film. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] A TPU composite board and its preparation process, please refer to Figure 1 , including a plate 100, a TPU film 101 is provided on the outer surface of the plate 100, a PET film 102 is provided on the outer surface of the TPU film 101, 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 0.2 mm - 0.4 mm.

[0020] By covering the outer surface of the plate 100 with a TPU film 101, due to its excellent wear resistance, 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. 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 printing on the surface of the plate 100, thereby improving the practicality of the device.

[0021] See also Figure 2-Figure 5 The preparation device includes a laminating machine 1, a conveying roller 2 is arranged above the laminating machine 1, a bottom plate 3 is placed above the conveying roller 2, a connecting plate 4 is fixedly installed at a position near the end of the top of the bottom plate 3, a pressure bin 5 is arranged on the top of the connecting plate 4, an air guide hole 6 is arranged on the front of the pressure bin 5, and the air guide hole 6 is designed to be double-layered, and a clamping plate 7 is arranged near the middle and top of the front of the pressure bin 5, and the clamping plate 7 clamps the TPU film 101 and the PET film 102 respectively, and a two-way fan 8 and a connecting pipe port 9 are arranged near the left end and the middle of the top of the pressure bin 5, and 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 arranged on the inner wall of the pressure bin 5 near one end, and a travel 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; 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.

[0022] After the clamping plate 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 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 holes 6 to generate airflow under the TPU film 101 and the PET film 102, and 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, 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 bonding, 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 behind the peritoneum 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 providing reliability to the device.

[0023] 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-skid device 15 is provided on the top of the placement plate 14. A plate 100 is placed on the top of the placement plate 14 between the anti-skid 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. Lower pressure arms 17 are 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, which are respectively placed above the TPU film 101 and the PET film 102. A resistance-enhancing device 19 is fixedly installed at the end of the slide bar 10; 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 matches the pressure chamber 5.

[0024] 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.

[0025] 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 gas outward, and through the design of the double-layer air guide hole 6, a vacuum is drawn between the TPU film 101 and the plate 100, and between the TPU film 101 and the PET film 102, thereby completing the lamination, 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.

[0026] See also Figure 3 and Fig. 9 The resistance increasing device 19 includes a transverse rod 191, a connecting frame 192 is arranged on the top of the transverse rod 191, a spring extrusion rod 193 is arranged at the front end of the connecting frame 192, 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 side of the pressure chamber 5.

[0027] 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 side of the stroke plate 131, and the stroke plate 131 is movably installed with the limit rod 11 through the round hole, a spring contact rod 133 is movably installed on the front side of the stroke plate 131 near the top and the bottom, 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 side of the stroke plate 131, and a contact sensor 136 is arranged on the front side 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 side of the stroke plate 131, and one end of the return spring 137 is connected to the inner wall of the pressure chamber 5.

[0028] In order to ensure that the airflow intensity generated by the operation of the two-way fan 8 is sufficient to make the TPU film 101 and the PET film 102 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 to move in the direction of the principle baffle 12 as a whole, and the moving distance 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 contacts the contact sensor 136, so that the operating power of the two-way fan 8 stops increasing, and the airflow is stabilized 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, thereby providing stability during the operation of the device.

[0029] See also Figure 8-Figure 9, the first guide wheel 134 is in contact with the resistance increasing plate 194 .

[0030] When the number of plates 100 is large, or the volume of plates 100 is large and the top structure is more complicated, the plate 100 has an increased effect of 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 bin 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 bin 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, so that the device can automatically adjust the airflow intensity, thereby improving the automation of the device.

[0031] See also Fig.10 The anti-skid device 15 includes an anti-skid plate 151, and a wind receiving plate 152 is fixedly installed at a position near both ends of the top of the anti-skid plate 151.

[0032] When the air guide hole 6 sprays air flow toward the upper area of ​​the base plate 3, the wind receiving plate 152 rotates under the push of the air flow, thereby driving the anti-slip plate 151 to rotate and form 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 by the air flow and causing the problem of failure of normal coating, thereby improving the reliability of the device.

[0033] A method for preparing a TPU composite plate comprises the following steps: S1, placing the plate 100 on the top of the placement plate 14, clamping the TPU film 101 and the PET film 102 with the clamping plate 7, and sending the bottom plate 3 into the interior of the laminating machine 1 through the conveying roller 2; S2, the bidirectional fan 8 runs and pressurizes the interior of the pressure chamber 5 through the connecting pipe port 9, and the pressurization intensity is continuously increased, forming a negative pressure so that the TPU film 101 and the PET film 102 are bonded and deformed with the plate 100; 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 which time the pressurization intensity of the bidirectional fan 8 stops increasing and remains stable; 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 compression strength of the resistance-enhancing plate 194 on the stroke device 13 is increased through the transmission of the slide rod 10; 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; S6, the bidirectional fan 8 is operated to reduce the pressure, and the negative pressure is used to make the TPU film 101 and the PET film 102 close to the plate 100 and achieve lamination.

[0034] The method of use of the present invention is as follows: 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, and then the bottom plate 3 is driven to move to the inside of the laminating machine 1 through 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 bin 5 through the pipeline and the connecting pipe port 9, so that the air pressure inside the pressure bin 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 located on the upper layer is smaller than that of the air guide hole 6 located on the lower layer, so that the TPU film 101 and the PET film 102 are both covered with a plurality of air filters. 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 achieve bonding. 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 bonded to the plate 100 is reduced. After the bonding 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. 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 by the fixing frame 18, the two-way fan 8 draws out gas outwards. Through the design of the double-layer air guide hole 6, the space between the TPU film 101 and the plate 100, and between the TPU film 101 and the PET film 102 are vacuumed, thereby 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 to allow the TPU film 101 and the PET film 102 to bond to the plate 100 under the action of negative pressure, the two-way fan 8 is used to draw out air outwards. 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 to move as a whole in the direction of the principle baffle 12, and the moving distance 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, so that the operating power of the two-way fan 8 stops increasing, and the airflow is stabilized 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-slip plate 151 to rotate and forming a bulge on the top of the bottom plate 3.It has a blocking effect on the plate 100. When the number of plates 100 is large, or the volume of the plate 100 is large and the top structure is more complicated, the blocking effect of the plate 100 on the airflow is improved, and the plate 100 cannot move under the action of the wind receiving plate 152. At this time, the slide 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 plate 194 is squeezed into the inside of the pressure chamber 5. Since the resistance 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 increases, 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, and 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.

[0035] The plate 100 after double-layer coating of the TPU film 101 and the 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. The TPU film has good water impermeability and has a good waterproof effect. A layer of PET film 102 is coated on the outside of the TPU film 101 to improve 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 printing on the surface of the plate 100.

Claims

1. A TPU composite board, characterized in that: The plate (100) comprises a plate (100), wherein 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.

2. The method for preparing a TPU composite plate according to claim 1, characterized in that: The thickness of the TPU film (101) and the PET film (102) ranges from 0.2 mm to 0.4 mm.

3. A method for preparing a TPU composite plate, 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 close 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 completed and 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.

4. A TPU composite plate according to claim 2, characterized in that: The TPU composite board preparation device comprises a laminating machine (1), wherein a conveying roller (2) is arranged above the laminating machine (1), a bottom plate (3) is placed above the conveying roller (2), a connecting plate (4) is fixedly installed at a position near the end of the top of the bottom plate (3), a pressure chamber (5) is arranged at the top of the connecting plate (4), an air guide hole (6) is arranged on the front of the pressure chamber (5), and the air guide hole (6) is designed to be double-layered, and clamping plates (7) are arranged at positions near the middle and the top of the front of the pressure chamber (5), and the clamping plates (7) respectively clamp the TPU film (101) and a PET film (102); a two-way fan (8) and a connecting pipe port (9) are arranged at 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 arranged at a position near one end of the inner wall of the pressure chamber (5); a travel 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.

5. The device for preparing a TPU composite plate according to claim 4, characterized in that: A placement plate (14) is fixedly mounted at the front end of the slide bar (10), a top movable sleeve of the placement plate (14) is provided with an anti-skid device (15), a plate (100) is placed at a position between the anti-skid device (15) on the top of the placement plate (14), a second guide wheel (16) is provided at the bottom of the placement plate (14), the second guide wheel (16) is in contact with the bottom plate (3), lower pressure arms (17) are provided on both sides of the placement plate (14), a fixed frame (18) is movably mounted on the inner side of the lower pressure arm (17), 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), and a resistance increasing device (19) is fixedly mounted at the end of the slide bar (10); A groove is provided on the inner side of the fixed frame (18) near the end, and the groove matches the pressure chamber (5).

6. The device for preparing a TPU composite plate according to claim 5, characterized in that: When the downward pressing arm (17) rotates, it drives the fixed frame (18) to press downward and clamp the TPU film (101) and the PET film (102) respectively.

7. The device for preparing a TPU composite plate according to claim 5, characterized in that: The resistance increasing device (19) comprises a transverse rod (191), a connecting frame (192) is arranged on the top of the transverse rod (191), a spring extrusion rod (193) is arranged at the front end of the connecting frame (192), a resistance increasing plate (194) is fixedly mounted 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.

8. The device for preparing a TPU composite plate according to claim 4, characterized in that: The stroke device (13) comprises a stroke plate (131), a side air guide plate (132) is fixedly mounted on the right side of the stroke plate (131), a round hole is opened on the front side of the stroke plate (131), and the stroke plate (131) is movably mounted with the limit rod (11) through the round hole, a spring contact rod (133) is movably mounted on the front side of the stroke plate (131) near the top and the bottom, a first guide wheel (134) is fixedly mounted on the front end of the spring contact rod (133), a mounting bracket (135) is fixedly mounted on the back side of the stroke plate (131), a contact sensor (136) is arranged on the front side of the mounting bracket (135), and the position of the contact sensor (136) corresponds to that of the spring contact rod (133), a return spring (137) is clamped on the back side of the stroke plate (131), and one end of the return spring (137) is connected to the inner wall of the pressure chamber (5), The first guide wheel (134) is in contact with the resistance increasing plate (194).

9. The device for preparing a TPU composite plate according to claim 5, 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.

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