A production process for a green and environmentally friendly PVC decorative film

Abstract

The present invention relates to the technical field of PVC decorative films, and specifically to a production process for a green and environmentally friendly PVC decorative film, which includes the following steps: S1. Prepare raw materials and mix and pelletize them to make a PVC paste. Then, change the PVC paste from a flowing state to a viscous flow state, and then use a calender to press the raw materials into a PVC film. During the downward movement of the movable roller in the invention, the PVC film relaxes, the longitudinal tension applied thereto decreases, the tenon blocks, clamping rods and guiding rods on the movable roller move closer to the middle of the movable roller, and the two side edges of the PVC film move between the tenon blocks and the clamping rods under the guidance of the guiding rods. The guiding rod is coaxially aligned with the clamping rod under the pushing of the PVC film. Then, the movable roller moves upward, and the tenon blocks and the clamping rods drive the side edges of the PVC film to move towards both ends of the movable roller, so as to fully unfold the PVC film and smooth out the wrinkles on the PVC film.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC decorative films, and specifically relates to a production process of a green and environmentally friendly PVC decorative film. Background Art

[0002] PVC decorative film is a common building material, which has excellent heat insulation performance, ultraviolet ray isolation performance, is safe and explosion-proof, and is easy to install, so it is widely used.

[0003] According to the published (announced) number CN115246240A, the publication (announcement) date is October 28, 2022. A production process of a PVC decorative film disclosed adopts the following technical scheme: A production process of a PVC decorative film includes the following process steps: S1, metering: metering the required raw materials; S2, stirring and mixing: stirring and mixing the metered raw materials; S3, kneading: kneading the stirred raw materials; S4, calendering: calendering the kneaded raw materials into a certain thickness; S5, cooling: cooling the calendered raw materials to obtain a PVC film; S6, removing bubbles: removing the bubbles in the coating to be attached to the PVC film by extruding the feeding roller; S7, attaching: attaching an isolation coating and a skin-friendly coating to the PVC film to obtain a PVC decorative film. By adopting the above technical scheme, the bubbles in the coating are reduced before attachment, reducing the situation that the coating is difficult to completely cover the PVC film due to bubbles during attachment, and improving the product quality of the PVC decorative film.

[0004] In the prior art including the above patent, when producing a PVC decorative film, it needs to go through raw material preparation, mixing and pelletizing, plasticization, calendering and forming, and cooling and winding. The transfer of the decorative film in the middle is borne by rollers. However, the decorative film is very long, and the decorative film needs to be tightened during the transfer process, resulting in a large longitudinal tension on the decorative film, and wrinkles are likely to appear on the decorative film, which is not conducive to the printing and winding operations. Summary of the Invention

[0005] The purpose of the present invention is to provide a production process of a green and environmentally friendly PVC decorative film, aiming to solve the problem that the decorative film needs to be tightened during transfer, is subjected to a large longitudinal tension, and is prone to wrinkles.

[0006] To achieve the above purpose, the present invention provides a production process of a green and environmentally friendly PVC decorative film, including the following steps:

[0007] S1, prepare raw materials and mix and pelletize them into PVC paste, then change the PVC paste from a flowing state to a viscous flow state, and then press the raw materials into a PVC film by a calender.

[0008] S2. Cool and solidify the PVC film and transfer it to the movable roller through the transfer roller. The movable roller reciprocates vertically to change the longitudinal tension on the PVC film;

[0009] S3. During the downward movement of the movable roller, the tenon block, clamping rod, and guiding rod on it approach the middle of the movable roller. The two sides of the PVC film move between the tenon block and the clamping rod under the guidance of the guiding rod, and the guiding rod is coaxially aligned with the clamping rod under the pushing of the PVC film;

[0010] S4. Then the movable roller moves upward, and the tenon block and the clamping rod drive the sides of the PVC film to move towards both ends of the movable roller to fully unfold the PVC film;

[0011] S5. When the movable roller moves to the highest point, the clamping rod unlocks and can drive the guiding rod to rotate, enabling the PVC film to move and be wound by the winding device.

[0012] Preferably, it includes a frame, and the following are provided on the frame:

[0013] Transfer roller;

[0014] Movable roller, on which a traction assembly is symmetrically and movably arranged and is always located directly above it and is used to traction the sides of the PVC film. The movable roller moves downward to make the two traction assemblies move towards the middle of the movable roller. The movable roller includes the following two working positions:

[0015] First working position, the movable roller is at the highest point, and the movable roller rotates relative to the frame to convey the PVC film;

[0016] Second working position, the movable roller leaves the highest point, and the movable roller only slides relative to the frame;

[0017] Driven roller, which is used to cooperate with the movable roller to convey the PVC film.

[0018] Preferably, a support block for supporting the movable roller is slidably arranged on the frame, a locking block is movably arranged on the movable roller, and locking grooves are provided on the support block and are distributed in a circumferential array and are adapted to the locking block.

[0019] Preferably, a slider for driving the locking block to move is provided on the frame, and when the movable roller moves to the highest point, the slider drives the locking block to leave the support block.

[0020] Preferably, an installation ring for supporting the traction assembly is rotatably arranged on the movable roller, and a guiding block for restricting its moving direction is arranged on the installation ring.

[0021] Preferably, tenon grooves corresponding to a plurality of locking grooves one by one and used to guide the movement of the traction assembly are provided on the movable roller.

[0022] Preferably, the traction assembly includes a tenon block movably mounted on the mounting ring, and a clamping rod for clamping the side edge of the PVC film is movably arranged on the tenon block. The clamping rod has the following two states;

[0023] In the first state, the movable roller is at the first working position, and the clamping rod can rotate relative to the tenon block;

[0024] In the second state, the movable roller is at the second working position, and the clamping rod is fixed on the tenon block.

[0025] Preferably, a guiding rod for guiding the side edge of the PVC film is hinged on the clamping rod, and a trigger piece for pushing it to rotate is arranged on the guiding rod.

[0026] Preferably, a locking rod for locking the clamping rod is arranged inside the tenon block. When the movable roller is at the highest point, the driven roller pushes the locking rod to separate from the clamping rod.

[0027] Preferably, a connecting rod is arranged between the mounting ring and the tenon block. The connecting rod is a self-elastic telescopic rod, and a first pulling rope is arranged between the tenon block and the frame.

[0028] In the above technical solution, a green and environment-friendly PVC decorative film production process provided by the present invention has the following beneficial effects: during the downward movement of the movable roller, the PVC film is relaxed, the longitudinal tension received is reduced, the tenon block, the clamping rod and the guiding rod on the movable roller move closer to the middle of the movable roller, and the two side edges of the PVC film move between the tenon block and the clamping rod under the guidance of the guiding rod. The guiding rod is coaxially arranged with the clamping rod under the pushing of the PVC film. Then the movable roller moves upward, and the tenon block and the clamping rod drive the side edges of the PVC film to move towards both ends of the movable roller, so that the PVC film is fully unfolded and the wrinkles on the PVC film are smoothed. When the movable roller moves to the highest point, the clamping rod is unlocked, and the supporting rod drives the guiding rod to rotate relative to the tenon block, so that the PVC film can move and be wound by the winding device. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0030] Figure 1 It is the overall structure schematic diagram provided by the embodiment of the present invention;

[0031] Figure 2 It is the structure schematic diagram of the notch provided by the embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the internal structure of the rack provided by the embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the structure of the transmission belt provided by the embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the structure of the slider provided by the embodiment of the present invention;

[0035] Figure 6 is Figure 5 the enlarged view at position A in

[0036] Figure 7 Schematic diagram of the internal structure of the transmission shaft provided by the embodiment of the present invention;

[0037] Figure 8 is Figure 7 the enlarged view at position B in

[0038] Figure 9 is Figure 8 the enlarged view at position C in

[0039] Explanation of reference numerals:

[0040] 1, rack; 11, movable roller; 111, transmission shaft; 112, transmission wheel; 1121, transmission belt; 1122, driving rod; 1123, tensioning wheel; 1124, synchronous chain; 113, locking block; 1131, second pulling rope; 114, slider; 115, guide groove; 116, support block; 1161, locking groove; 117, driving disc; 118, rocker; 119, shaft rod; 12, tenon block; 121, clamping rod; 122, guiding rod; 123, triggering piece; 124, movable disc; 125, reed; 126, locking hole; 127, locking rod; 128, triggering rod; 131, mounting ring; 132, guiding block; 133, notch; 134, first pulling rope; 135, connecting rod; 136, tenon groove; 14, intermediate roller; 15, driven roller. Detailed implementation manners

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

[0042] As Figures 1-9 shown, a production process of a green and environment-friendly PVC decorative film includes the following steps:

[0043] S1. Prepare raw materials and mix and granulate them into PVC paste. Then, change the PVC paste from a flowing state to a viscous flow state, and then press the raw materials into a PVC film by a calender;

[0044] S2. Cool and solidify the PVC film, and transfer it to the movable roller 11 through the transfer roller 14. The movable roller 11 reciprocates vertically to change the longitudinal tension on the PVC film;

[0045] S3. During the downward movement of the movable roller 11, the tenon block 12, the clamping rod 121 and the guiding rod 122 on it move closer to the middle of the movable roller 11. The two sides of the PVC film move between the tenon block 12 and the clamping rod 121 under the guidance of the guiding rod 122. The guiding rod 122 is coaxial with the clamping rod 121 under the pushing of the PVC film;

[0046] S4. Then the movable roller 11 moves upward, and the tenon block 12 and the clamping rod 121 drive the sides of the PVC film to move towards both ends of the movable roller 11 to fully unfold the PVC film;

[0047] S5. When the movable roller 11 moves to the highest point, the clamping rod 121 is unlocked and can drive the guiding rod 122 to rotate, enabling the PVC film to move and be wound by the winding device.

[0048] Specifically, during the downward movement of the movable roller 11, the PVC film relaxes, and the longitudinal tension on it decreases. The tenon block 12, the clamping rod 121 and the guiding rod 122 on the movable roller 11 move closer to the middle of the movable roller 11. The two sides of the PVC film move between the tenon block 12 and the clamping rod 121 under the guidance of the guiding rod 122. The guiding rod 122 is coaxial with the clamping rod 121 under the pushing of the PVC film. Then the movable roller 11 moves upward, and the tenon block 12 and the clamping rod 121 drive the sides of the PVC film to move towards both ends of the movable roller 11 to fully unfold the PVC film and smooth out the wrinkles on the PVC film. When the movable roller 11 moves to the highest point, the clamping rod 121 is unlocked, and the support rod drives the guiding rod 122 to rotate relative to the tenon block 12, enabling the PVC film to move and be wound by the winding device.

[0049] In the above technical solution, during the downward movement of the movable roller 11, the PVC film relaxes, and the longitudinal tension on it decreases. The tenon block 12, the clamping rod 121 and the guiding rod 122 on the movable roller 11 move closer to the middle of the movable roller 11. The two sides of the PVC film move between the tenon block 12 and the clamping rod 121 under the guidance of the guiding rod 122. The guiding rod 122 is coaxial with the clamping rod 121 under the pushing of the PVC film. Then the movable roller 11 moves upward, and the tenon block 12 and the clamping rod 121 drive the sides of the PVC film to move towards both ends of the movable roller 11 to fully unfold the PVC film and smooth out the wrinkles on the PVC film. When the movable roller 11 moves to the highest point, the clamping rod 121 is unlocked, and the support rod drives the guiding rod 122 to rotate relative to the tenon block 12, enabling the PVC film to move and be wound by the winding device.

[0050] As a further embodiment provided by the present invention, it includes a frame 1, and the following are provided on the frame 1:

[0051] A transfer roller 14;

[0052] A movable roller 11, on which a traction assembly is symmetrically and movably arranged and is always located directly above it and is used to traction the side edges of the PVC film. The movable roller 11 moves downward to make the two traction assemblies move towards the middle of the movable roller 11. The movable roller 11 includes the following two working positions:

[0053] The first working position, the movable roller 11 is at the highest point, and the movable roller 11 rotates relative to the frame 1 to convey the PVC film;

[0054] The second working position, the movable roller 11 leaves the highest point, and the movable roller 11 only slides relative to the frame 1;

[0055] A driven roller 15, which is used to cooperate with the movable roller 11 to convey the PVC film.

[0056] Specifically, a notch 133 for guiding the movement of the movable roller 11 is provided on the frame 1.

[0057] Furthermore, during the downward movement of the movable roller 11, the PVC film relaxes, the longitudinal tension it receives decreases, the traction assemblies on the movable roller 11 approach the middle of the movable roller 11, and the two side edges of the PVC film move into the traction assemblies. Then the movable roller 11 moves upward, and the traction assemblies drive the side edges of the PVC film to move towards both ends of the movable roller 11 to fully unfold the PVC film and smooth the wrinkles on the PVC film. When the movable roller 11 moves to the highest point, the traction assemblies release the side edges of the PVC film, and the movable roller 11 rotates to convey the PVC film, and the PVC film is wound up by the winding device.

[0058] As yet another embodiment further provided by the present invention, a support block 116 for supporting the movable roller 11 is slidably arranged on the frame 1, a locking block 113 is movably arranged on the movable roller 11, and locking grooves 1161 which are distributed in a circumferential array and are adapted to the locking block 113 are provided on the support block 116.

[0059] Specifically, a motor is rotatably arranged inside the frame 1, a driving disk 117 is fixedly installed on the output end of the motor, a rocker 118 is arranged between the driving disk 117 and the support block 116. The rocker 118 is specifically a self-elastic telescopic rod. A sliding groove for guiding the movement of the support block 116 is arranged inside the frame 1. A transmission shaft 111 extending into the support block 116 is arranged on the movable roller 11, and a locking block 113 is slidably arranged on the transmission shaft 111.

[0060] Further, during operation, the motor outputs torque to drive the drive disk 117 to rotate. The drive disk 117 drives the support block 116 to move through the rocker 118. At this time, the locking block 113 on the transmission shaft 111 is inserted into the locking groove 1161 on the support block 116, and the movable roller 11 is fixed on the support block 116 and cannot rotate. When the support block 116 drives the movable roller 11 to move to the highest point, the locking block 113 on the transmission shaft 111 moves, and the locking block 113 separates from the locking groove 1161. The movable roller 11 can rotate relative to the support block 116 to convey the PVC film. At the same time, the end of the rocker 118 rotatably mounted on the drive disk 117 does not move to the highest point, and the drive disk 117 continues to rotate, causing the rocker 118 to be compressed, and the movable roller 11 can stay at the highest point for a period of time.

[0061] As another embodiment further provided by the present invention, a slider 114 for driving the locking block 113 to move is provided on the frame 1. The movable roller 11 moves to the highest point so that the slider 114 drives the locking block 113 to leave the support block 116.

[0062] Specifically, a transmission wheel 112 is provided on the transmission shaft 111, a transmission belt 1121 partially attached to the transmission wheel 112 is provided inside the frame 1, a drive rod 1122 for driving the transmission belt 1121 to move is provided on the frame 1, a shaft rod 119 is provided on the drive disk 117, a synchronous chain 1124 is provided between the shaft rod 119 and the drive rod 1122, a tensioning wheel 1123 for tensioning the synchronous chain 1124 is rotatably provided on the frame 1, a second pulling rope 1131 is provided between the slider 114 and the locking block 113, springs are provided between the slider 114 and the transmission shaft 111, and springs are provided between the locking block 113 and the transmission shaft 111. A guide groove 115 for pushing the slider 114 is provided on the frame 1, and the depth of the guide groove 115 increases from top to bottom.

[0063] Further, during the process of the support block 116 driving the movable roller 11 to move upward, the slider 114 moves upward along the guide groove 115, the depth of the guide groove 115 gradually decreases, the guide groove 115 pushes the slider 114 to move inside the transmission shaft 111, the second pulling rope 1131 is tightened, and the slider 114 drives the locking block 113 to move inside the transmission shaft 111 through the second pulling rope 1131. When the movable roller 11 moves to the highest point, the locking block 113 completely retracts into the transmission shaft 111, the transmission wheel 112 is attached to the transmission belt 1121, and the movable roller 11 is unlocked. At this time, the drive disk 117 drives the shaft rod 119 to rotate, the shaft rod 119 drives the drive rod 1122 to rotate through the synchronous chain 1124, the drive rod 1122 drives the transmission belt 1121 to move, and the transmission belt 1121 drives the transmission wheel 112 to rotate through friction, thereby driving the transmission shaft 111 and the movable roller 11 to rotate, and the movable roller 11 conveys the PVC film.

[0064] As yet another embodiment further provided by the present invention, a mounting ring 131 for supporting a traction assembly is rotatably provided on the movable roller 11, and a guide block 132 for restricting its moving direction is provided on the mounting ring 131.

[0065] Specifically, the guide block 132 is adapted to a notch 133 on the frame 1.

[0066] Further, the guide block 132 is always located within the notch 133 to restrict the mounting ring 131 to reciprocate only in the vertical direction, so that the traction assembly on the mounting ring 131 is always directly above the movable roller 11.

[0067] As yet another embodiment further provided by the present invention, a mortise groove 136 corresponding to a plurality of lock grooves 1161 one by one and for guiding the movement of the traction assembly is formed on the movable roller 11.

[0068] Specifically, a slope is provided at the end of the mortise groove 136.

[0069] Further, during the downward movement of the movable roller 11, the movable block moves downward along the guide groove 115, the movable block gradually extends outside the transmission shaft 111, the second pulling rope 1131 is relaxed, and at the same time the traction assembly moves toward the middle of the movable roller 11. The traction assembly moves along the slope at the end of the mortise groove 136, pushing the movable roller 11 to rotate relative to the support block 116 until the traction assembly enters the mortise groove 136. At this time, the lock block 113 on the movable roller 11 is aligned with one of the plurality of lock grooves 1161 on the support plate, and the lock block 113 is inserted into the lock groove 1161 under the push of the spring to fix the movable roller 11 on the support block 116.

[0070] As yet another embodiment further provided by the present invention, the traction assembly includes a tenon block 12 movably mounted on the mounting ring 131, and a clamping rod 121 for clamping the side edge of the PVC film is movably provided on the tenon block 12. The clamping rod 121 includes the following two states;

[0071] The first state is that the movable roller 11 is in the first working position, and the clamping rod 121 can rotate relative to the tenon block 12;

[0072] The second state is that the movable roller 11 is in the second working position, and the clamping rod 121 is fixed to the tenon block 12.

[0073] Specifically, the tenon block 12 is adapted to the mortise groove 136, and the distance between the clamping rod 121 and the tenon block 12 is equal to the thickness of the PVC film.

[0074] Further, when the movable roller 11 moves downward, the tenon block 12 drives the clamp to move along the tenon groove 136 towards the middle of the movable roller 11. At this time, the side edge of the PVC film gradually inserts into the gap between the clamping rod 121 and the tenon block 12. The clamping rod 121 cooperates with the tenon block 12 to clamp the side edge of the PVC film. Then, the movable roller 11 moves upward, and the tenon block 12 and the clamping rod 121 cooperate to drive the side edge of the PVC film to move the side edge of the movable roller 11, so as to unfold the PVC film. When the movable roller 11 moves to the highest point, the clamping rod 121 is unlocked, and the clamping rod 121 can rotate relative to the tenon block 12 to facilitate the movement of the side edge of the PVC film.

[0075] As another embodiment further provided by the present invention, a guiding rod 122 for guiding the side edge of the PVC film is hinged on the clamping rod 121, and a trigger piece 123 for pushing its rotation is arranged on the guiding rod 122.

[0076] Specifically, the trigger piece 123 is located at one end where the guiding rod 122 is connected to the support rod. A torsion spring is arranged between the guiding rod 122 and the support rod, and a groove adapted to the trigger piece 123 is formed on the clamping rod 121.

[0077] Further, during the downward movement of the movable roller 11, the guiding rod 122 rotates relative to the clamping rod 121 under the action of the torsion spring. The trigger piece 123 on the guiding rod 122 abuts against the tenon block 12. When the side edge of the PVC film abuts against the guiding rod 122, the side edge of the PVC film moves along the inclined guiding rod 122 to the included angle formed by the trigger piece 123 and the tenon block 12. The side edge of the PVC film continues to move and pushes the trigger piece 123. The trigger piece 123 drives the guiding rod 122 to rotate, so that the guiding rod 122 is coaxial with the clamping rod 121. The trigger piece 123 is embedded into the groove on the clamping rod 121, and the side edge of the PVC film moves between the clamping rod 121 and the tenon block 12 and is fixed by the clamping rod 121.

[0078] As another embodiment further provided by the present invention, a locking rod 127 for locking the clamping rod 121 is arranged inside the tenon block 12. The movable roller 11 is at the highest point so that the driven roller 15 pushes the locking rod 127 to separate from the clamping rod 121.

[0079] Specifically, a trigger rod 128 is slidably arranged on the tenon block 12, a locking rod 127 is arranged on the trigger rod 128, a spring is arranged between the trigger rod 128 and the tenon block 12, a locking hole 126 adapted to the locking rod 127 is formed on the clamping rod 121, a movable disc 124 is rotatably arranged on the clamping rod 121, a torsion spring is arranged between the movable disc 124 and the clamping rod 121, a reed 125 is arranged on the movable disc 124, a groove adapted to the tenon block 12 is formed inside the tenon block 12, and a groove is arranged at the end of the driven roller 15.

[0080] Further, when the movable roller 11 is at the highest point, the trigger rod 128 abuts against the driven roller 15, and the driven roller 15 pushes the trigger rod 128 and the locking rod 127 downward. The locking rod 127 separates from the locking hole 126, and the clamping rod 121 is unlocked. At this time, the PVC film moves, and the PVC film drives the clamping rod 121 to rotate. At this time, the movable disk 124 is locked in the tenon block 12 by the reed 125. The clamping rod 121 rotates relative to the movable disk 124, and the torsion spring accumulates elastic potential energy until the force exerted by the torsion spring on the movable disk 124 deforms the reed 125 and separates it from the groove. At this time, the movable disk 124 rotates with the clamping rod 121; during the downward movement of the movable roller 11, due to the wrinkles of the PVC film, the side edge of the PVC film separates from the clamping rod 121, the clamping rod 121 stops rotating, and the trigger rod 128 separates from the driven roller 15. At this time, the torsion spring releases elastic potential energy, and the reed 125 on the movable disk 124 abuts against the inner wall of the tenon block 12. The rotation resistance of the movable disk 124 is large, and the torsion spring drives the clamping rod 121 to rotate until the locking hole 126 on the clamping rod 121 is aligned with the locking rod 127. The trigger rod 128 moves upward under the push of the spring, and the locking rod 127 is inserted into the locking hole 126 to lock the clamping rod 121. The torsion spring continues to release elastic potential energy, causing the movable disk 124 to rotate relative to the clamping rod 121, and the reed 125 on the movable disk 124 is re-embedded into the groove on the inner wall of the tenon block 12.

[0081] As another embodiment further provided by the present invention, a connecting rod 135 is provided between the mounting ring 131 and the tenon block 12. The connecting rod 135 is specifically a self-elastic telescopic rod, and a first pulling rope 134 is provided between the tenon block 12 and the frame 1.

[0082] Specifically, during operation, the motor outputs torque to drive the driving disk 117 to rotate. The driving disk 117 drives the support block 116 to move downward through the rocker 118. The support block 116 drives the movable roller 11 to move downward through the transmission shaft 111. The first pulling rope 134 between the tenon block 12 and the frame 1 is relaxed, and the connecting rod 135 releases the accumulated elastic potential energy. The connecting rod 135 pushes the tenon block 12 towards the center of the movable roller 11. The tenon block 12 moves along the slope on the tenon groove 136. The tenon block 12 pushes the movable roller 11 to rotate relative to the support block 116 until the traction assembly enters one of the plurality of tenon grooves 136. At this time, the locking block 113 on the movable roller 11 is aligned with one of the plurality of locking grooves 1161 on the support plate. Moreover, during the downward movement of the movable roller 11, the movable block moves downward along the guide groove 115, and the movable block gradually extends outside the transmission shaft 111. The second pulling rope 1131 is relaxed, and the locking block 113 is inserted into the locking groove 1161 under the push of the spring to fix the movable roller 11 on the support block 116.

[0083] During the downward movement of the movable roller 11, due to the wrinkles on the PVC film, the side edge of the PVC film separates from the clamping rod 121, the clamping rod 121 stops rotating, the trigger rod 128 separates from the driven roller 15. At this time, the torsion spring releases elastic potential energy, and the reed 125 on the movable disk 124 abuts against the inner wall of the tenon block 12. The rotation resistance of the movable disk 124 is relatively large. The torsion spring drives the clamping rod 121 to rotate until the lock hole 126 on the clamping rod 121 is aligned with the lock rod 127. The trigger rod 128 moves upward under the push of the spring, and the lock rod 127 is inserted into the lock hole 126 to lock the clamping rod 121. The torsion spring continues to release elastic potential energy, causing the movable disk 124 to rotate relative to the clamping rod 121, and the reed 125 on the movable disk 124 re-embeds into the groove on the inner wall of the tenon block 12.

[0084] The guide rod 122 rotates relative to the clamping rod 121 under the action of the torsion spring. The trigger piece 123 on the guide rod 122 abuts against the tenon block 12. When the side edge of the PVC film abuts against the guide rod 122, the side edge of the PVC film moves along the inclined guide rod 122 to the included angle formed by the trigger piece 123 and the tenon block 12. The side edge of the PVC film continues to move and pushes the trigger piece 123. The trigger piece 123 drives the guide rod 122 to rotate, making the guide rod 122 coaxial with the clamping rod 121. The trigger piece 123 embeds into the groove on the clamping rod 121. The side edge of the PVC film moves between the clamping rod 121 and the tenon block 12 and is fixed by the clamping rod 121.

[0085] The drive disk 117 continues to rotate and drives the movable roller 11 to move upward through the rocker 118. The first pull rope 134 gradually tightens, driving the tenon block 12 to move towards both ends of the movable roller 11. The tenon block 12 gradually leaves the tenon groove 136. The connecting rod 135 between the tenon block 12 and the mounting ring 131 is compressed and stores elastic potential energy. The tenon block 12 and the clamping rod 121 cooperate to move the side edge of the PVC film to move the side edge of the movable roller 11, so that the PVC film unfolds. The slider 114 moves upward along the guide groove 115. The depth of the guide groove 115 gradually decreases. The guide groove 115 pushes the slider 114 to move towards the inside of the transmission shaft 111. The second pull rope 1131 tightens, and the slider 114 drives the lock block 113 to move towards the inside of the transmission shaft 111 through the second pull rope 1131.

[0086] When the movable roller 11 moves to the highest point, the locking block 113 completely retracts into the transmission shaft 111. The transmission wheel 112 closely adheres to the transmission belt 1121, and the movable roller 11 is unlocked. At this time, the driving disc 117 drives the shaft rod 119 to rotate. The shaft rod 119 drives the driving rod 1122 to rotate through the synchronous chain 1124. The driving rod 1122 drives the transmission belt 1121 to move. The transmission belt 1121 drives the transmission wheel 112 to rotate through friction, and then drives the transmission shaft 111 and the movable roller 11 to rotate. At the same time, the trigger rod 128 abuts against the driven roller 15. The driven roller 15 pushes the trigger rod 128 and the locking rod 127 to move downward. The locking rod 127 separates from the locking hole 126, and the clamping rod 121 is unlocked. At this time, the PVC film moves. The PVC film drives the clamping rod 121 to rotate. At this time, the movable disc 124 is locked in the tenon block 12 by the reed 125. The clamping rod 121 rotates relative to the movable disc 124, and the torsion spring stores elastic potential energy until the force exerted by the torsion spring on the movable disc 124 deforms the reed 125 and separates it from the groove. At this time, the movable disc 124 rotates with the clamping rod 121. The movable roller 11 cooperates with the driven roller 15 to convey the PVC film, and the PVC film is wound up by the winding device.

[0087] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A production process of a green and environment-friendly PVC decorative film, characterized in that, Comprising a frame, on which are provided: A transfer roller; A movable roller, on which symmetrically and movably arranged are traction assemblies that are always located directly above it and are used to traction the sides of the PVC film. The movable roller moves downward to cause the two traction assemblies to move towards the middle of the movable roller. The movable roller includes the following two working positions: The first working position, where the movable roller is at the highest point, and the movable roller rotates relative to the frame to convey the PVC film; The second working position, where the movable roller leaves the highest point, and the movable roller only slides relative to the frame; A driven roller, which is used to cooperate with the movable roller to convey the PVC film; A notch is formed on the frame for guiding the movement of the movable roller; An installation ring for supporting the traction assembly is rotatably arranged on the movable roller. A guiding block for restricting its moving direction is arranged on the installation ring, and the guiding block is adapted to the notch on the frame; The traction assembly includes a tenon block movably installed on the installation ring. A clamping rod for clamping the side of the PVC film is movably arranged on the tenon block. The clamping rod includes the following two states: The first state, where the movable roller is in the first working position, and the clamping rod can rotate relative to the tenon block; The second state, where the movable roller is in the second working position, and the clamping rod is fixed on the tenon block; The tenon block is adapted to the mortise, and the distance between the clamping rod and the tenon block is equal to the thickness of the PVC film; A guiding rod for guiding the side of the PVC film is hinged on the clamping rod. A trigger piece for pushing its rotation is arranged on the guiding rod. The trigger piece is located at one end where the guiding rod is connected to the support rod. A torsion spring is arranged between the guiding rod and the support rod. A groove adapted to the trigger piece is formed on the clamping rod; It further includes the following steps: S1. Prepare raw materials and mix and granulate them to make PVC paste. Then change the PVC paste from a flowing state to a viscous flow state, and then press the raw materials into a PVC film by a calender; S2. Cool and solidify the PVC film and convey it to the movable roller through the transfer roller. The movable roller reciprocates in the vertical direction to change the longitudinal tension received by the PVC film; S3. During the downward movement of the movable roller, the tenon block, clamping rod and guiding rod on it move towards the middle of the movable roller. The two sides of the PVC film move between the tenon block and the clamping rod under the guidance of the guiding rod, and the guiding rod is coaxially aligned with the clamping rod under the pushing of the PVC film; S4. Then the movable roller moves upward, and the tenon block and the clamping rod drive the sides of the PVC film to move towards both ends of the movable roller to fully unfold the PVC film; S5. When the movable roller moves to the highest point, the clamping rod is unlocked and can drive the guiding rod to rotate, so that the PVC film can move and be wound up by a winding device.

2. The production process of a green and environmentally friendly PVC decorative film according to claim 1, characterized in that, A support block for supporting the movable roller is slidably arranged on the frame. A locking block is movably arranged on the movable roller. Locking grooves that are arranged in a circumferential array and are adapted to the locking block are formed on the support block.

3. The production process of a green and environmentally friendly PVC decorative film according to claim 2, characterized in that, A sliding block for driving the locking block to move is formed on the frame. The movable roller moves to the highest point to cause the sliding block to drive the locking block to leave the support block.

4. The production process of a green environmental protection PVC decorative film according to claim 2, characterized in that, Mortises that correspond to the multiple locking grooves one by one and are used to guide the movement of the traction assembly are formed on the movable roller.

5. The production process of a green and environmentally friendly PVC decorative film according to claim 1, characterized in that, A locking rod for locking the clamping rod is arranged inside the tenon block, and the movable roller is at the highest point so that the driven roller pushes the locking rod to separate from the clamping rod.

6. The production process of a green environmental protection PVC decorative film according to claim 1, characterized in that, A connecting rod is arranged between the mounting ring and the tenon block, and the connecting rod is specifically a self-elastic telescopic rod. A first pulling rope is arranged between the tenon block and the frame.

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