Method for one-step synthesis of optical grade pmma plates

Abstract

The application discloses a method for synthesizing optical PMMA plate in one step, which comprises the following steps: pre-polymerization, secondary polymerization, tertiary polymerization, post-treatment, extrusion plate making, centralized loading and unloading and packaging treatment, a plurality of surface treatment devices are transported by driving a carrier vehicle and are centrally transported to the inside of a transfer mechanism, a single carrying mechanism in the loading and unloading area is driven by a tractor to enter the inside of the transfer mechanism, the PMMA plate is transferred by the transfer mechanism and is centrally and orderly placed in the inside of the carrying mechanism for storage, and then the carrying mechanism loaded with the PMMA plate is driven by the tractor to drive out of the inside of the transfer mechanism. The application has the advantages of low production cost, simple process and the like, and after the surface treatment of the PMMA plate is completed, the PMMA plate is centrally packed and transported, and the PMMA plate is effectively protected, so that the smoothness of the surface of the PMMA plate is not affected by factors such as bumping and vibration of a transportation tool, friction and carrying operation.

Description

Technical Field

[0001] The invention relates to the technical field of PMMA plate processing, in particular to a method for synthesizing optical-grade PMMA plates in one step. Background Art

[0002] Optical-grade PMMA sheet, also known as polymethyl methacrylate (PMMA) sheet, is a highly transparent, high-strength plastic sheet with optical properties comparable to glass. Compared to glass, PMMA sheet has the advantages of being lightweight, easy to process, and not prone to breakage. PMMA sheet is widely used in optics, electronics, construction, advertising, and other fields. In the optical field, PMMA sheet is used to manufacture optical instruments, panel displays, car lights, LED lights, etc. In the construction field, PMMA sheet can be used to manufacture skylights, skylights, partitions, sun visors, etc. PMMA sheet is usually available in different transparencies and colors. At the same time, PMMA sheet also has anti-UV, anti-static, wear-resistant, anti-fog and other properties, which can meet the needs of different fields.

[0003] In the existing technical field, the one-step synthesis of optical-grade PMMA sheets refers to a method of using a single reactor to simultaneously complete polymerization and sheet forming. Since the one-step synthesis of optical-grade PMMA sheets eliminates the intermediate granulation, drying, melting, extrusion, and sheet making steps compared to the traditional granulation, drying, melting, extrusion, and sheet making production process, the production efficiency is higher, and large quantities of PMMA sheets produced need to be centrally loaded and unloaded. Since PMMA is relatively fragile, it is easily affected by forces such as extrusion and friction, resulting in surface wear. During the transportation and handling between different equipment during the processing process, factors such as the bumpy vibration of the transportation vehicle, friction, and handling operations between the processing workshop and the warehouse will cause severe wear of the PMMA sheet surface, and in severe cases, even damage to the sheet surface. This wear will directly affect the optical quality of the product, thereby causing the PMMA sheet to be easily damaged before leaving the factory, thereby reducing the factory qualification rate. Summary of the Invention

[0004] The object of the present invention is to provide a one-step method for synthesizing optical-grade PMMA sheets, so as to at least solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a one-step method for synthesizing an optical-grade PMMA sheet, comprising the following steps:

[0006] A one-step method for synthesizing an optical-grade PMMA sheet, characterized in that it comprises the following steps:

[0007] Step 1, prepolymerization: add monomer MMA, comonomer MA, solvent, initiator, chain transfer agent, and release agent into a polymerization kettle and stir evenly to carry out polymerization reaction; control the reaction temperature in the polymerization kettle to 95-120°C, the pressure to 0.8-1.2 MPa, and the reaction time to 1-2 hours;

[0008] Step 2, secondary polymerization: the mixture obtained in step 1 is continuously transported to the secondary reactor via a pump to continue the temperature reaction, and an initiator and a devolatilizer are added to the secondary reactor to continue the reaction. The reaction temperature in the reactor is controlled at 160-200°C, the pressure is 1.5-2.3 MPa, and the reaction time is 2-3 hours;

[0009] Step 3, tertiary polymerization: The polymer material obtained in step 2 is pumped to the front end of the extruder for further reaction, and an initiator is simultaneously added to the delivery pipeline; the temperature at the front end of the extruder is controlled at 190-220°C, the pressure at 2.2-3 MPa, the screw speed at 90-150 r / min, and the reaction time at 30-40 min;

[0010] Step 4, post-treatment: The reaction mixture is stripped of small molecules through a devolatilizer, and the removed small molecule materials are recovered for recycling. The extruder devolatilizer temperature is set at 240-270°C, the devolatilizer pressure is -0.09~-0.05MPa, and the residence time is 5-10min to finally obtain a polymer material;

[0011] Step 5: Extrusion to form a sheet: The polymer material obtained in step 4 is extruded through a die directly connected to the extruder, and then calendered, drawn, and surface treated to finally produce a PMMA sheet;

[0012] Surface treatment: The molded PMMA sheets are subjected to surface treatment and sub-surface treatment using designated equipment. Surface treatment uses grinding, polishing, sandblasting, and chemical polishing to eliminate defects and contaminants on the material surface and enhance the material's light transmittance and smoothness. Sub-surface treatment uses ion implantation and plasma treatment to eliminate defects and textures inside the material and improve the material's optical properties.

[0013] Step 6. Centralized loading and unloading: The surface-treated PMMA sheets are concentrated from multiple surface treatment equipment to the secondary PMMA sheet auxiliary loading and unloading device for loading and unloading, which increases the efficiency of PMMA sheets and protects the surface-treated PMMA sheets.

[0014] The PMMA sheets inside multiple surface treatment devices are transported and concentratedly transported to the transfer mechanism by driving a carrier vehicle. A single carrier in the loading and unloading area is pulled into the transfer mechanism by a tractor. The PMMA sheets are transferred through the transfer mechanism and placed in an orderly manner inside the carrier for centralized storage. The carrier loaded with PMMA sheets is then pulled out of the transfer mechanism by a tractor for subsequent packaging.

[0015] Step 7: Packaging: Packaging, encapsulation, labeling and loading of the post-processed PMMA sheets.

[0016] Preferably, an auxiliary loading and unloading device for one-step synthesis of optical-grade PMMA sheets comprises: a loading and unloading area, a carrying mechanism, a transfer mechanism, a controller, a carrying vehicle and a tractor; the number of the carrying mechanisms is several, and the several carrying mechanisms are arranged at intervals on the inner side of the loading and unloading area; the transfer mechanism is arranged in the front side of the loading and unloading area along the front-to-back direction; the controller is arranged on the outer side of the transfer mechanism; the carrying vehicle is located in front of the transfer mechanism; and the tractor is located on the inner side of the loading and unloading area.

[0017] Preferably, the transport mechanism comprises: a transport frame, a track frame, a pallet, an electric telescopic rod, a mounting frame, a scissor-type telescopic device, an electromagnetic suction cup and a control module; the transport frame can be connected to a tractor, and the tractor can drive the transport frame to move in the loading and unloading area and the inner side of the transfer mechanism; the number of the track frames is several, and the several track frames are arranged at intervals from top to bottom on the inner side of the transport frame; the number of the pallets is several, and the several pallets are respectively plugged into the top of the several track frames, and the bottom of the pallet is provided with a guide wheel that can move on the top of the pallet; the electric telescopic device can be connected to a tractor, and the tractor can drive the transport frame to move in the loading and unloading area and the inner side of the transfer mechanism; the number of the track frames is several, and the several track frames are arranged at intervals from top to bottom on the inner side of the transport frame; the number of the pallets is several, and the several pallets are respectively plugged into the top of the several track frames, and the bottom of the pallet is provided with a guide wheel that can move on the top of the pallet; There are two retractable rods, and the two electric telescopic rods are respectively installed at the left and right ends of the rear side of the carrier frame; the mounting frame is arranged at the top of the telescopic ends of the left and right electric telescopic rods, and the shape of the mounting frame is T-shaped; the scissor-type telescopic device is installed at the front bottom end of the mounting frame; the electromagnetic suction cup is arranged in front of the telescopic end of the scissor-type telescopic device, and the electromagnetic suction cup can be magnetically attracted to the rear side of the pallet to achieve connection; the control module is arranged at the rear bottom end of the carrier frame, and the control module is electrically connected to the electric telescopic rod, the scissor-type telescopic device and the electromagnetic suction cup respectively, and the control module is remotely connected to the controller network.

[0018] Preferably, the transfer mechanism includes: a transfer mechanism shell, a purification module, an electric sealing door, an infrared sensor, a first ground rail, a rotating base, a transport assembly and a placement assembly; the transfer mechanism shell is arranged at the front side of the loading and unloading area along the front-to-back direction; the number of the purification modules is two, and the two purification modules are respectively embedded in the front and back sides of the inner cavity of the transfer mechanism shell, and the purification module is electrically connected to the controller; the number of the electric sealing doors is two, and the two electric sealing doors are respectively embedded in the middle of the bottom ends of the front and back sides of the inner cavity of the transfer mechanism shell, and the electric sealing door is electrically connected to the controller; the number of the infrared sensors is two, and the two The infrared sensors are respectively arranged at the front and rear ends of the right side of the bottom end of the inner cavity of the transfer mechanism shell, and the infrared sensors are electrically connected to the controller; the first ground rail is arranged in the front middle of the bottom end of the inner cavity of the transfer mechanism shell along the front-to-back direction, and the first ground rail is electrically connected to the controller; the rotating base is installed on the top of the moving end of the first ground rail, and the rotating base is electrically connected to the controller; the number of the transport components is two, and the two transport components are respectively arranged on the front and rear sides of the rotating end of the rotating base; the number of the placement components is two groups, and the number of the placement components in each group is two, and the two groups of placement components are respectively arranged at the left and right ends of the rear side of the transfer mechanism shell.

[0019] Preferably, the handling assembly includes: a base, a limiting guide rail, a shell, a cable unwinder, a rotating arm, a pneumatic suction cup, a guide rail frame, a first motor, a rotating rod, a limiting wheel, a bevel gear set, a second motor, a first connecting rod and a rotating rod; the base is arranged on the top of the rotating base along the up and down directions; the limiting guide rail is arranged on the outside of the base along the up and down directions; the shell is arranged on the outside of the movable end of the limiting guide rail; the cable unwinder is installed on the top of the base, the internal cable of the cable unwinder is connected to the top of the shell, the cable unwinder controls the lifting and lowering of the shell by automatically unwinding and winding the internal cable, and the cable unwinder is electrically connected to the controller; the rotating arm is rotatably connected to the inner side of the shell along the front and rear directions by a pin shaft; the pneumatic suction cup is rotatably connected to the outer end of the rotating arm by a pin shaft, and the pneumatic suction cup is electrically connected to the controller; the guide rail frame is arranged on the The inner side of the top end of the rotating arm; the first motor is fixedly mounted on the top of the shell, and the first motor and the controller are electrically connected; one end of the rotating rod is screwed to the rotating end of the first motor; the limiting wheel is arranged at the bottom of the other end of the rotating rod, and the limiting wheel can be plugged into the inner side of the guide rail frame; the bevel gear set is arranged on the inner side of the bottom end of the rotating arm, and the bevel gear set consists of two bevel gears that are vertically meshed; the second motor is arranged at the bottom end of the rotating arm, and the output end of the second motor is screwed to the gear on one side of the bevel gear set, and the second motor and the controller are electrically connected; the number of the first connecting rods is two, and one end of the two first connecting rods is respectively fixedly connected to the outer wall of the axis of the pneumatic suction cup and the axis of the gear on the other side of the bevel gear set; the two ends of the rotating rod are respectively rotatably connected to the other end of the two first connecting rods through pins.

[0020] Preferably, the placement component includes: a second ground rail, an elevator, a box and a conveying unit; the second ground rail is arranged at the bottom of the inner cavity of the transfer mechanism shell, and the second ground rail is electrically connected to the controller; the elevator is arranged at the moving end of the second ground rail, and the elevator is electrically connected to the controller; the box is arranged at the top of the lifting end of the elevator, and the outer top and inner bottom of the outer wall of the box are respectively provided with a feeding port and a discharging port; the conveying unit is arranged in the inner cavity of the box.

[0021] Preferably, the conveying unit includes: a conveying unit mounting frame, a track frame, a third motor, a roller, a rotating frame, a moving card seat frame, a connecting pulley, a fourth motor, a driving pulley, a connecting belt and a fixed card seat frame; the conveying unit mounting frame is arranged on the inner side of the bottom end of the inner cavity of the box body; the track frame is arranged on the inner side of the top end of the inner cavity of the conveying unit mounting frame, and the track frame extends into the inner side of the discharge port of the inner cavity of the box body; the third motor is arranged on the front side of the track frame, and the output end of the third motor extends into the inner side of the track frame, and the third motor and the controller are electrically connected; the roller is installed at the output end of the third motor along the front and rear direction, and the outer wall of the roller is provided with a plurality of card slots at intervals along the axial direction; the number of the rotating frames is two groups, and the number of the rotating frames in each group is two, and the two groups of the rotating frames are rotatably connected to the inner and outer sides of the front and rear ends of the inner side of the conveying unit mounting frame by pin shafts, and the front The axis of the rotating frame on the side extends out of the outer wall of the conveying unit mounting frame; the number of the movable card seat frames is two, and the two movable card seat frames are respectively connected to the top of the two groups of rotating frames by pin shafts in the left and right directions; the number of the connecting pulleys is two, and the two connecting pulleys are respectively keyed to the axis of the front rotating frame; the fourth motor is arranged at the inner bottom end of the conveying unit mounting frame, and the output end of the fourth motor extends out of the front side of the conveying unit mounting frame, and the fourth motor and the controller are electrically connected; the driving pulley is screwed to the output end of the driving pulley; the connecting belt is arranged on the front side of the conveying unit mounting frame, and the inner side of the connecting belt is respectively socketed with the outer walls of the left and right connecting pulleys and the driving pulley; the number of the fixed card seat frames is two, and the two fixed card seat frames are respectively arranged on the front and back sides of the inner top of the conveying unit mounting frame.

[0022] Preferably, the conveying unit also includes: a storage shell, a through slot, a through slot, a guide plate, a bottom plate, a rotating seat, a second connecting rod, a pushing seat, a limiting slot, a socket, an insertion rod, a limiting rod, a ball head connecting rod, a ball head eccentric seat and a fifth motor; the storage shell is arranged at the bottom end of the inner cavity of the box body and is located on the outside of the conveying unit mounting bracket, and the storage shell is located below the feed port of the inner cavity of the box body; the through slot is opened at the top inner side of the inner cavity of the storage shell; the guide plate is arranged downwardly and tilted in the inner direction of the outer wall of the storage shell and is located below the through slot; the bottom plate is arranged downwardly and tilted in the outer direction of the top inner cavity of the storage shell; the rotating seat is rotatably connected to the inner side of the storage shell through a pin shaft seat and is located at the top of the box body; one end of the second connecting rod is rotatably connected to one end of the rotating seat through a pin shaft; the pushing seat The movable seat is arranged at the top of the other end of the second connecting rod, the top end of the pushing seat is shaped like an inclined surface, and the thickness of the pushing seat is the same as the distance between the inner side of the bottom plate and the inner wall of the storage shell; the limiting groove is opened on the inner side of the other end of the rotating seat; the socket is arranged on the inner wall of the box body and is located outside the inner cavity of the storage shell, and the socket is located below the bottom plate; the insertion rod is inserted into the inner side of the socket along the up and down directions; the limiting rod is arranged at the bottom end of the insertion rod, and the limiting rod is inserted into the inner cavity of the limiting groove; one end of the ball head connecting rod is rotatably connected to the top of the insertion rod through a pin shaft; one end of the ball head eccentric seat is connected to the top of the ball head connecting rod; the fifth motor is arranged above the socket, and the output end of the fifth motor is fixedly connected to the axis of the ball head eccentric seat, and the fifth motor is electrically connected to the controller.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. A single PMMA sheet is carried to the interior of the transfer mechanism housing by a carrier. The first ground rail drives the rotating base to move the transport assembly to the front side. The infrared sensor drives the front and rear transport assemblies to rotate to the corresponding positions of the carrier in sequence. The wire rope unwinder unwinds or tightens the internal wire rope to drive the housing to a specified height. The pneumatic suction cup absorbs the PMMA sheet carried inside the carrier. The first ground rail drives the rotating base to move the transport assembly to the rear side. The tractor pulls the carrier into the interior of the transfer mechanism housing. The electric telescopic rod drives the mounting frame to move up and down. The scissor-type telescopic device makes the electromagnetic suction cup contact and magnetically connect with the pallet. The scissor-type telescopic device extends to move the pallet forward along the surface of the track frame in cooperation with the electromagnetic suction cup.

[0025] 2. The elevator is driven by the second ground rail to drive the box to move inward to the left and right sides of the carrier frame. The elevator drives the box to move up and down to the specified height position. The column foam pad is pre-stacked along the bottom plate surface in the storage shell. The fifth motor drives the ball head eccentric seat to move the insertion rod up and down. The insertion rod drives the limit rod to move in the limit slot cavity, and with the cooperation of the second connecting rod, the push seat pushes the column foam pad along the inner wall of the storage shell to the through slot position. The column foam pad passes through the through slot cavity and enters the outer slot cavity at the top of the fixed card seat frame along the guide plate. The fourth motor drives the drive pulley to rotate, thereby driving the mobile card seat frame The cylindrical foam pad on the top of the dynamic fixed card seat frame is progressively transported from the outside to the inside to the surface of the track frame. The third motor drives the roller to rotate, so that the cylindrical foam pad on the surface of the track frame is thrown into the surface of the shell under the action of the rotating force of the roller. The first motor drives the rotating rod to make the limiting wheel contact the inner wall of the guide rail frame. The second motor drives the bevel gear set to rotate, and with the cooperation of the rotating rod, drives the first connecting rod on the other side to drive the pneumatic suction cup to rotate, and then adjusts the position and direction of the PMMA plate below through the pneumatic suction cup to place it on the surface of the shell. The staff drives the tractor to tow the carrier out of the inner cavity of the transfer mechanism shell and parks it inside the loading and unloading area to wait for orderly transportation to the post-processing area.

[0026] Therefore, a one-step method for synthesizing optical-grade PMMA sheets is proposed. Compared with the traditional two-step preparation method, it has the advantages of low production cost, simple and easy-to-control process, etc. After the surface treatment of the PMMA sheets is completed, the PMMA sheets are centrally packaged and transported, and the PMMA sheets are effectively protected to prevent them from being affected by factors such as the bumps and vibrations of the transportation tools, friction, and handling operations that affect the smoothness of the PMMA sheet surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 for Figure 1 Exploded diagram of the carrier mechanism.

[0029] Figure 3 for Figure 1 Exploded diagram of the transfer mechanism.

[0030] Figure 4 for Figure 1 Exploded view of the handling assembly.

[0031] Figure 5 for Figure 1 Exploded diagram of the placement mechanism.

[0032] Figure 6 for Figure 1 Exploded view of the transport unit.

[0033] Figure 7 for Figure 6 Enlarged view of point A.

[0034] In the figure: 1. loading and unloading area, 2. transport mechanism, 21. transport frame, 22. track frame, 23. pallet, 24. electric telescopic rod, 25. mounting frame, 26. scissor telescope, 27. electromagnetic suction cup, 28. control module, 3. transfer mechanism, 31. transfer mechanism shell, 32. purification module, 33. electric sealing door, 34. infrared sensor, 35. first ground rail, 36. rotating base, 4. handling component, 41. base, 42. limit guide rail, 43. shell, 44. steel cable unwinder, 45. rotating arm, 46. pneumatic suction cup, 47. guide rail frame, 48. first motor, 49. rotating rod, 410. limit wheel, 411. bevel gear set, 412. second motor, 413. first connecting rod, 414. rotating rod, 5. Components, 51. Second ground rail, 52. Elevator, 53. Box, 6. Transport unit, 61. Transport unit mounting frame, 62. Track frame, 63. Third motor, 64. Roller, 65. Rotating frame, 66. Mobile card holder frame, 67. Connecting pulley, 68. Fourth motor, 69. Driving pulley, 610. Connecting belt, 611. Fixed card holder frame, 612. Storage shell, 613. Through slot, 614. Guide plate, 615. Bottom plate, 616. Rotating seat, 617. Second connecting rod, 618. Push seat, 619. Limiting slot, 620. Socket, 621. Insert rod, 622. Limiting rod, 623. Ball head connecting rod, 625. Ball head eccentric seat, 626. Fifth motor, 7. Controller, 8. Carrier, 9. Tractor. Implementation Method

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

[0036] See also Figure 1-7 The present invention provides a technical solution: a one-step method for synthesizing an optical-grade PMMA sheet, characterized in that it comprises the following steps:

[0037] Step 1, prepolymerization: add monomer MMA, comonomer MA, solvent, initiator, chain transfer agent, and release agent into a polymerization kettle and stir evenly to carry out polymerization reaction; control the reaction temperature in the polymerization kettle to 100°C, the pressure to 1 MPa, and the reaction time to 1.5 hours;

[0038] Step 2, secondary polymerization: The mixture obtained in step 1 is continuously pumped into a secondary reactor to continue the temperature reaction, and an initiator and a devolatilizer are added to the secondary reactor to continue the reaction. The reaction temperature in the reactor is controlled at 180°C, the pressure is 2 MPa, and the reaction time is 2.3 h.

[0039] Step 3, tertiary polymerization: The polymer material obtained in step 2 is pumped to the front end of the extruder for further reaction, and an initiator is simultaneously added to the delivery pipeline; the temperature at the front end of the extruder is controlled at 200°C, the pressure at 2.5 MPa, the screw speed at 120 r / min, and the reaction time at 35 min;

[0040] Step 4, post-treatment: The reaction mixture is stripped of small molecules through a devolatilizer, and the removed small molecule materials are recovered for recycling. The extruder devolatilizer temperature is set to 255°C, the devolatilizer pressure is -0.07MPa, and the residence time is 8min to finally obtain a polymer material;

[0041] Step 5: Extrusion to form a sheet: The polymer material obtained in step 4 is extruded through a die directly connected to the extruder, and then calendered, drawn, and surface treated to finally produce a PMMA sheet;

[0042] Surface treatment: The molded PMMA sheets are subjected to surface treatment and sub-surface treatment using designated equipment. Surface treatment uses grinding, polishing, sandblasting, and chemical polishing to eliminate defects and contaminants on the material surface and enhance the material's light transmittance and smoothness. Sub-surface treatment uses ion implantation and plasma treatment to eliminate defects and textures inside the material and improve the material's optical properties.

[0043] Step 6. Centralized loading and unloading: The surface-treated PMMA sheets are concentrated from multiple surface treatment equipment to the secondary PMMA sheet auxiliary loading and unloading device for loading and unloading, which increases the efficiency of PMMA sheets and protects the surface-treated PMMA sheets.

[0044] The PMMA sheets in the plurality of surface treatment devices are transported and concentratedly transported to the interior of the transfer mechanism 3 by driving the carrier 8, and the single carrier 2 in the loading and unloading area 1 is towed by the tractor 9 into the interior of the transfer mechanism 3. The PMMA sheets are transferred by the transfer mechanism 3 and placed in an orderly manner inside the carrier 2 for centralized storage. The carrier 2 loaded with the PMMA sheets is then towed out of the interior of the transfer mechanism 3 by the tractor 9 for subsequent packaging processing.

[0045] Step 7: Packaging: Packaging, encapsulation, labeling and loading of the post-processed PMMA sheets.

[0046] As a preferred solution, further, the PMMA sheet auxiliary loading and unloading device includes: a loading and unloading area 1, a carrying mechanism 2, a transfer mechanism 3, a controller 7, a carrier 8 and a tractor 9. The loading and unloading area 1 refers to an area for storing and transferring the carrying mechanism 2, and its area and length can be designed according to the site and needs; the number of the carrying mechanisms 2 is several, and several carrying mechanisms 2 are arranged at intervals on the inner side of the loading and unloading area 1; the transfer mechanism 3 is arranged on the front side of the loading and unloading area 1 along the front and rear directions; the controller 7 is arranged on the outer side of the transfer mechanism 3, and a preset program and a network module are arranged inside the controller 7; the carrier 8 is located in front of the transfer mechanism 3, and a suction cup handling module is provided inside the carrier 8 for loading and transporting PMMA sheets, and is manually driven by staff; the tractor 9 is located on the inner side of the loading and unloading area 1, and an electric connector is provided inside the tractor 9 to be connected to the carrying vehicle frame 21 in the carrying mechanism 2, and is manually driven by staff.

[0047] As a preferred solution, further, Figure 2As shown, the transport mechanism 2 includes: a transport frame 21, a track frame 22, a pallet 23, an electric telescopic rod 24, a mounting frame 25, a scissor-type telescopic device 26, an electromagnetic suction cup 27 and a control module 28; the transport frame 21 can be connected to the tractor 9, and the tractor 9 can drive the transport frame 21 to move inside the loading and unloading area 1 and the transfer mechanism 3; there are several track frames 22, and several track frames 22 are arranged at intervals from top to bottom on the inner side of the transport frame 21, and the arrangement of the track frames 22 should ensure that the pallet 23 supports the middle part of the PMMA sheet; there are several pallets 23, and several pallets 23 are respectively plugged into the top of several track frames 22, and the bottom of the pallet 23 is provided with a guide wheel that can move on the top of the pallet 23, and the pallet 23 is used to carry the PMMA sheet to be transported; there are two electric telescopic rods 24, and the two electric telescopic rods 24 are respectively installed at the left and right ends of the rear side of the transport frame 21. The electric telescopic rod 24 can be controlled by the control module 28 to extend and retract, so that the mounting frame 25 and the scissor-type telescopic device 26 are height-adjustable; the mounting frame 25 is arranged at the top of the telescopic end of the left and right electric telescopic rods 24, and the shape of the mounting frame 25 is T-shaped; the scissor-type telescopic device 26 is installed at the front bottom end of the mounting frame 25, and the scissor-type telescopic device 26 can control its own extension and shortening through the control module 28 to drive the electromagnetic suction cup 27 to move; the electromagnetic suction cup 27 is arranged on the front side of the telescopic end of the scissor-type telescopic device 26, and the electromagnetic suction cup 27 can be magnetically attracted to the rear side of the tray 23 to achieve connection, and the electromagnetic suction cup 27 can be controlled by the control module 28 to achieve switching and adjustment of the adsorption force; the control module 28 is arranged at the rear bottom end of the carrier frame 21, and the control module 28 is electrically connected to the electric telescopic rod 24, the scissor-type telescopic device 26 and the electromagnetic suction cup 27 respectively, and the control module 28 is remotely connected to the controller 7 via the network. The control module 28 serves as the electronic control center of the carrier mechanism 2 to realize the coordinated work and control of various electrical components of the carrier mechanism 2, and the staff can monitor and remotely control the carrier mechanism 2 in real time through the controller 7.

[0048] As a preferred solution, further, Figure 3As shown, the transfer mechanism 3 includes: a transfer mechanism shell 31, a purification module 32, an electric sealing door 33, an infrared sensor 34, a first ground rail 35, a rotating base 36, a handling component 4 and a placement component 5; the transfer mechanism shell 31 is arranged at the front side of the loading and unloading area 1 along the front-to-back direction; there are two purification modules 32, and the two purification modules 32 are respectively embedded in the front and back sides of the inner cavity of the transfer mechanism shell 31, and the purification module 32 is electrically connected to the controller 7. The purification module 32 is controlled by the controller 7 and can purify the inner cavity of the transfer mechanism shell 31 to make the inner cavity of the transfer mechanism shell 31 in a dust-free environment; there are two electric sealing doors 33, and the two electric sealing doors 33 are respectively embedded in the middle of the bottom end of the front and back sides of the inner cavity of the transfer mechanism shell 31, and the electric sealing door 33 is electrically connected to the controller 7. The electric sealing door 33 is controlled by the controller 7 to realize opening or closing, and the electric sealing door 33 adopts an induction switch; there are two infrared sensors 34, and the two infrared sensors 34 are respectively arranged in the transfer mechanism shell 3 1, the front and rear ends of the right side of the bottom end of the inner cavity, the infrared sensor 34 is electrically connected to the controller 7, the front infrared sensor 34 detects the passing of the carrier 8 and sends a signal to the controller 7, and the rear infrared sensor 34 detects the passing of the tractor 9 and sends a signal to the controller 7; the first ground rail 35 is arranged in the front middle of the bottom end of the inner cavity of the transfer mechanism shell 31 along the front-to-back direction, the first ground rail 35 is electrically connected to the controller 7, the first ground rail 35 is controlled by the controller 7, and the first ground rail 35 can drive the rotating base 36 to move horizontally in the front and rear directions; the rotating base 36 is installed on the top of the moving end of the first ground rail 35, the rotating base 36 is electrically connected to the controller 7, the rotating base 36 is controlled by the controller 7, and the rotating base 36 can drive the transport components 4 on both sides to rotate to the specified direction position; the number of transport components 4 is two, and the two transport components 4 are respectively arranged on the front and rear sides of the rotating end of the rotating base 36; the number of placement components 5 is two groups, and the number of placement components 5 in each group is two, and the two groups of placement components 5 are respectively arranged at the left and right ends of the rear side of the transfer mechanism shell 31.

[0049] As a preferred solution, further, Figure 4As shown, the transport assembly 4 includes: a base 41, a limiting guide rail 42, a shell 43, a wire rope unwinder 44, a rotating arm 45, a pneumatic suction cup 46, a guide rail frame 47, a first motor 48, a rotating rod 49, a limiting wheel 410, a bevel gear set 411, a second motor 412, a first connecting rod 413 and a rotating rod 414; the base 41 is arranged on the top of the rotating base 36 in the up and down direction; the limiting guide rail 42 is arranged on the outside of the base 41 in the up and down direction; the shell 43 is arranged on the outside of the moving end of the limiting guide rail 42, and the shell 43 can move up and down on the outside of the limiting guide rail 42; the wire rope unwinder 44 is installed on the base 41 The top of the cable unwinder 44 is connected to the top of the outer shell 43, and the cable unwinder 44 controls the lifting and lowering of the outer shell 43 by automatically unwinding and winding the internal cable. The cable unwinder 44 is electrically connected to the controller 7, and the cable unwinder 44 is controlled by the controller 7; the rotating arm 45 is rotatably connected to the inner side of the outer shell 43 through a pin shaft in the front and rear directions, and the rotating arm 45 can deflect on the inner side of the outer shell 43 with the pin shaft rotation connection position as the axis center; the pneumatic suction cup 46 is rotatably connected to the outer end of the rotating arm 45 through a pin shaft, and the pneumatic suction cup 46 is electrically connected to the controller 7, and the pneumatic suction cup 46 is controlled by the controller 7. The guide rail frame 47 is arranged on the inner side of the top end of the rotating arm 45; the first motor 48 is fixedly mounted on the top of the housing 43, and the first motor 48 is electrically connected to the controller 7. The first motor 48 is controlled by the controller 7 to drive the rotating rod 49 to rotate clockwise or counterclockwise; one end of the rotating rod 49 is screwed to the rotating end of the first motor 48; the limiting wheel 410 is arranged at the bottom of the other end of the rotating rod 49, and the limiting wheel 410 can be plugged into the inner side of the guide rail frame 47; the bevel gear set 411 is arranged on the inner side of the bottom end of the rotating arm 45, and the bevel gear set 411 is two bevel gears that are vertically meshed; The second motor 412 is arranged at the bottom end of the rotating arm 45, and the output end of the second motor 412 is screwed to the gear on one side of the bevel gear set 411. The second motor 412 is electrically connected to the controller 7. The second motor 412 is controlled by the controller 7 to drive the bevel gear on one side of the bevel gear set 411 to rotate clockwise or counterclockwise; there are two first connecting rods 413, and one end of the two first connecting rods 413 is respectively fixedly connected to the outer wall of the axis of the pneumatic suction cup 46 and the axis of the gear on the other side of the bevel gear set 411; the two ends of the rotating rod 414 are respectively rotatably connected to the other end of the two first connecting rods 413 through a pin shaft.

[0050] As a preferred solution, further, Figure 5As shown, the placement component 5 includes: a second ground rail 51, an elevator 52, a box 53 and a conveying unit 6; the second ground rail 51 is arranged at the bottom of the inner cavity of the transfer mechanism shell 31, the second ground rail 51 is electrically connected to the controller 7, the second ground rail 51 is controlled by the controller 7, and the second ground rail 51 drives the elevator 52 to move horizontally in the left and right directions; the elevator 52 is arranged at the moving end of the second ground rail 51, the elevator 52 is electrically connected to the controller 7, the elevator 52 is controlled by the controller 7, and the elevator 52 can drive the box 53 to rise and fall to a specified height position; the box 53 is arranged at the top of the lifting end of the elevator 52, and the outer top and inner bottom of the outer wall of the box 53 are respectively provided with a feeding port and a discharging port; the conveying unit 6 is arranged in the inner cavity of the box 53.

[0051] As a preferred solution, further, Figure 6 and Figure 7As shown, the transport unit 6 includes: a transport unit mounting frame 61, a track frame 62, a third motor 63, a roller 64, a rotating frame 65, a movable card seat frame 66, a connecting pulley 67, a fourth motor 68, a driving pulley 69, a connecting belt 610, a fixed card seat frame 611, a storage shell 612, a through slot 613, a through slot 613, a guide plate 614, a bottom plate 615, a rotating seat 616, a second connecting rod 617, a pushing seat 618, a limiting slot 619, a socket 620, an insertion rod 621, a limiting rod 622, a ball head connecting rod 623, a ball head eccentric seat 625 and a fifth motor 626; the transport unit mounting frame 61 is arranged on the inner side of the bottom end of the inner cavity of the box body 53; the track frame 62 is arranged on the top end of the inner cavity of the transport unit mounting frame 61 On the inside, the track frame 62 extends into the inner side of the discharge port of the inner cavity of the box body 53; the third motor 63 is arranged on the front side of the track frame 62, and the output end of the third motor 63 extends into the inner side of the track frame 62, and the third motor 63 is electrically connected to the controller 7. The third motor 63 is controlled by the controller 7, and the controller 7 can control the rotation speed of the roller 64 driven by the third motor 63 to achieve the control of the throwing distance of the column foam pad; the roller 64 is installed at the output end of the third motor 63 in the front and back directions, and the outer wall of the roller 64 is provided with a plurality of slots at intervals along the axial direction, and the outer slots of the roller 64 are adapted to the outer diameter of the column foam pad; the number of rotating frames 65 is two groups, and the number of each group of rotating frames 65 is two, and the two groups of rotating frames 65 are respectively connected to the conveying unit through pins. The axis of the front rotating frame 65 extends out of the outer wall of the conveying unit mounting frame 61 at the inner and outer sides of the front and rear ends of the inner side of the unit mounting frame 61; there are two mobile card base frames 66, and the two mobile card base frames 66 are respectively connected to the top of the two groups of rotating frames 65 by pin shafts in the left and right directions, and the tops of the mobile card base frames 66 are spaced apart with card slots; there are two connecting pulleys 67, and the two connecting pulleys 67 are respectively keyed to the axis of the front rotating frame 65; the fourth motor 68 is arranged at the inner bottom end of the conveying unit mounting frame 61, and the output end of the fourth motor 68 extends out of the front side of the conveying unit mounting frame 61, and the fourth motor 68 is electrically connected to the controller 7, and the fourth motor 68 can be controlled by the controller 7 to drive the driving pulley 69 unidirectionally Rotation; the driving pulley 69 is screwed to the output end of the driving pulley 69; the connecting belt 610 is arranged on the front side of the conveying unit mounting frame 61, and the inner side of the connecting belt 610 is respectively sleeved with the left and right connecting pulleys 67 and the outer wall of the driving pulley 69, and the inner side of the connecting belt 610 is provided with a limiting pulley fixedly installed on the front side of the conveying unit mounting frame 61; the number of fixed card holders 611 is two, and the two fixed card holders 611 are respectively arranged on the front and rear sides of the inner top of the conveying unit mounting frame 61, and the top of the fixed card holders 611 is spaced apart with card slots; the storage shell 612 is arranged at the bottom end of the inner cavity of the box body 53 and is located on the outside of the conveying unit mounting frame 61, and the storage shell 612 is located below the feed port of the inner cavity of the box body 53;The through slot 613 is provided at the top inner side of the inner cavity of the storage shell 612; the guide plate 614 is tilted downwardly and arranged on the inner side of the outer wall of the storage shell 612 and is located below the through slot 613, and the distance between the guide plate 614 and the fixed card seat frame 611 is greater than the rotation height of the movable card seat frame 66; the bottom plate 615 is tilted downwardly and arranged on the outer side of the top inner cavity of the storage shell 612; the rotating seat 616 is rotatably connected to the inner side of the storage shell 612 through the pin seat and is located at the top of the box body 53, and the rotating seat 616 can be deflected upward or downward at both ends with the top pin rotation connection with the box body 53 as the axis; one end of the second connecting rod 617 is rotatably connected to one end of the rotating seat 616 through the pin shaft; the pushing seat 618 is arranged on the top of the other end of the second connecting rod 617, and the top shape of the pushing seat 618 is an inclined surface, and the thickness of the pushing seat 618 is the same as the distance between the inner side of the bottom plate 615 and the inner wall of the storage shell 612; the limit A slot 619 is formed inside the other end of the rotating seat 616. A socket 620 is provided on the inner wall of the housing 53 and is located outside the inner cavity of the storage housing 612. The socket 620 is located below the bottom plate 615. A rod 621 is inserted into the inner side of the socket 620 in the vertical direction, and the rod 621 can reciprocate up and down inside the socket 620. A limiting rod 622 is provided at the bottom end of the rod 621 and is inserted into the inner cavity of the limiting slot 619. One end of the ball connecting rod 623 is rotatably connected to the top of the rod 621 via a pin. One end of the ball eccentric seat 625 is connected to the top of the ball connecting rod 623. A fifth motor 626 is provided above the socket 620. The output end of the fifth motor 626 is fixedly connected to the axis of the ball eccentric seat 625. The fifth motor 626 is electrically connected to the controller 7. The fifth motor 626 can be controlled by the controller 7 to drive the ball eccentric seat 625 to rotate unidirectionally.

[0052] The working principle of the auxiliary loading and unloading device for one-step synthesis of optical grade PMMA sheets is as follows:

[0053] Step 1: The staff drives the transport vehicle 8 to carry a single PMMA sheet. The preset program in the controller 7 controls the front electric sealing door 33 to open, so that the transport vehicle 8 enters the interior of the transfer mechanism housing 31. The infrared sensor 34 detects that a vehicle has passed and sends a signal to the controller 7. The preset program in the controller 7 controls the purification module 32, the first ground rail 35 and the rotating base 36 to start. The purification module 32 purifies the inner cavity of the transfer mechanism housing 31 into a dust-free space. The first ground rail 35 drives the rotating base 36 to drive the transport component 4 to move to the front side. The infrared sensor 34 drives the front and rear transport components 4 to rotate to the corresponding positions of the transport vehicle 8 in sequence. The preset program in the controller 7 controls the wire rope unwinder 44 and the pneumatic suction cup 46 in the transport component 4 at the corresponding position. The wire rope unwinder 44 unwinds or tightens the internal wire rope to drive the housing 43, so that the housing 43 moves to a specified height position under the limiting action of the limiting guide rail 42. The pneumatic suction cup 46 absorbs the PMMA sheet carried in the transport vehicle 8. The first ground rail 35 drives the rotating base 36 to drive the transport component 4 to move backward.

[0054] Step 2: The staff drives the tractor 9 to tow the single carrier mechanism 2 inside the loading and unloading area 1, and passes through the rear electric sealing door 33 to enter the interior of the transfer mechanism shell 31 to adjust the position of the carrier mechanism 2 so that the carrier mechanism 2 is located on the inner side of the components 5 on the left and right sides. The rear infrared sensor 34 detects and identifies the passage of the carrier mechanism 2 and sends a signal to the controller 7, so that the controller 7 controls the control module 28 in the carrier mechanism 2 at the corresponding position to start. The control module 28 controls the electric telescopic rod 24 and the scissor-type telescopic device 26. The electric telescopic rod 24 drives the mounting frame 25 to move up and down by its own extension and shortening, thereby moving the scissor-type telescopic device 26 to the specified position behind the pallet 23 in turn. The scissor-type telescopic device 26 is extended to make the electromagnetic suction cup 27 contact and magnetically connect with the rear side of the pallet 23 at the corresponding position. The scissor-type telescopic device 26 is extended to make the pallet 23 move forward along the surface of the track frame 22 with the cooperation of the electromagnetic suction cup 27.

[0055] Step 3: The preset program inside the controller 7 controls the second ground rail 51 and the elevator 52 in the corresponding position of the assembly 5 to start. The second ground rail 51 drives the elevator 52 to move the box 53 inward to the left and right sides of the carrier frame 21. The elevator 52 drives the box 53 up and down to make it rise and fall to the specified height position. The preset program inside the controller 7 controls the fifth motor 626, the fourth motor 68 and the third motor 63 of the transport unit 6 in the box 53 in the corresponding position of the assembly 5 to start. The staff pre-places the column foam pad The feed port of the box body 53 is placed on the inner side of the storage shell 612, so that the column foam pad is stacked downward along the surface of the bottom plate 615 in the inner cavity of the storage shell 612, and the fifth motor 626 drives the eccentric seat 625 of the ball head to rotate eccentrically, so that the eccentric seat 625 of the ball head drives the top end of the ball head connecting rod 623 to move circumferentially, and the bottom end of the ball head connecting rod 623 deflects at the top end of the insertion rod 621 while driving the insertion rod 621 to move up and down. Under the limiting action of the socket 620, the insertion rod 621 drives the limiting rod 622 to move in the inner cavity of the limiting groove 619, and is in the matching position of the limiting groove 619. The driving rotating seat 616 deflects back and forth up and down with the axis of the pin shaft as the axis, and the rotating seat 616 drives the pushing seat 618 to reciprocate up and down on the inner side of the storage shell 612 with the cooperation of the second connecting rod 617, so that the pushing seat 618 pushes the column foam pad to move along the inner wall of the storage shell 612 to the position of the through groove 613, and the column foam pad passes through the inner cavity of the through groove 613 and enters the inner cavity of the outer end of the card slot at the top of the fixed card seat frame 611 along the guide plate 614. The fourth motor 68 drives the driving pulley 69 to rotate, so that the driving pulley 69 is connected to the belt 610. The transmission lower driving connecting pulley 67 drives the front rotating frame 65 to rotate, and the front rotating frame 65 drives the movable card base frame 66 to rotate circumferentially under the limiting action of the rear rotating frame 65, and the movable card base frame 66 contacts the top cylindrical foam pad inside the fixed card base frame 611, so that the movable card base frame 66 drives the top cylindrical foam pad of the fixed card base frame 611 to be progressively transported from the outside to the inside to the surface of the track frame 62, and the third motor 63 drives the roller 64 to rotate, so that the cylindrical foam pad on the surface of the track frame 62 is thrown into the surface of the shell 43 under the action of the rotational force of the roller 64;

[0056] Step 4: The controller 7 is pre-programmed to start the first motor 48 and the second motor 412 in the transport assembly 4 at the corresponding position. The first motor 48 drives the rotating rod 49 to rotate clockwise or counterclockwise, so that the rotating rod 49 drives the limiting wheel 410 to move forward or backward in the inner cavity of the guide rail frame 47. At the same time, the limiting wheel 410 contacts the inner wall of the guide rail frame 47, and then drives the rotating arm 45 to deflect inside the housing 43 under the cooperation of the guide rail frame 47. The second motor 412 drives the bevel gear set 41 1 rotates, and under the transmission of the bevel gear set 411, drives the first connecting rod 413 at the corresponding position to drive the rotating rod 414 to rotate, and under the cooperation of the rotating rod 414, drives the first connecting rod 413 on the other side to drive the pneumatic suction cup 46 to rotate, and then adjusts the position and direction of the lower PMMA plate through the pneumatic suction cup 46 so that it is placed on the surface of the shell 43. The staff drives the tractor 9 to tow the carrying mechanism 2 out of the inner cavity of the transfer mechanism shell 31 and parks it inside the loading and unloading area 1 to wait for orderly transportation to the post-processing area;

[0057] Therefore, a one-step method for synthesizing optical-grade PMMA sheets is proposed. Compared with the traditional two-step preparation method, it has the advantages of low production cost, simple and easy-to-control process, etc. After the surface treatment of the PMMA sheets is completed, the PMMA sheets are centrally packaged and transported, and the PMMA sheets are effectively protected to prevent them from being affected by factors such as the bumps and vibrations of the transportation tools, friction, and handling operations that affect the smoothness of the PMMA sheet surface.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A one-step method for synthesizing optical-grade PMMA sheets, characterized in that: The following steps are involved: Step 1, prepolymerization: add monomer MMA, comonomer MA, solvent, initiator, chain transfer agent, and release agent into a polymerization kettle and stir evenly to carry out polymerization reaction; control the reaction temperature in the polymerization kettle to 95-120°C, the pressure to 0.8-1.2 MPa, and the reaction time to 1-2 hours; Step 2, secondary polymerization: the mixture obtained in step 1 is continuously transported to the secondary reactor via a pump to continue the temperature reaction, and an initiator and a devolatilizer are added to the secondary reactor to continue the reaction. The reaction temperature in the reactor is controlled at 160-200°C, the pressure is 1.5-2.3 MPa, and the reaction time is 2-3 hours; Step 3, tertiary polymerization: The polymer material obtained in step 2 is pumped to the front end of the extruder for further reaction, and an initiator is simultaneously added to the delivery pipeline; the temperature at the front end of the extruder is controlled at 190-220°C, the pressure at 2.2-3 MPa, the screw speed at 90-150 r / min, and the reaction time at 30-40 min; Step 4, post-treatment: The reaction mixture is stripped of small molecules through a devolatilizer, and the removed small molecule materials are recovered for recycling. The extruder devolatilizer temperature is set at 240-270°C, the devolatilizer pressure is -0.09~-0.05MPa, and the residence time is 5-10min to finally obtain a polymer material; Step 5: Extrusion to form a sheet: The polymer material obtained in step 4 is extruded through a die directly connected to the extruder, and then calendered, drawn, and surface treated to finally produce a PMMA sheet; Surface treatment: The molded PMMA sheets are subjected to surface treatment and sub-surface treatment using designated equipment. Surface treatment uses grinding, polishing, sandblasting, and chemical polishing to eliminate defects and contaminants on the material surface and enhance the material's light transmittance and smoothness. Sub-surface treatment uses ion implantation and plasma treatment to eliminate defects and textures inside the material and improve the material's optical properties. Step 6. Centralized loading and unloading: The surface-treated PMMA sheets are concentrated from multiple surface treatment equipment to the PMMA sheet auxiliary loading and unloading device for loading and unloading, which increases the efficiency of the PMMA sheets and protects the surface-treated PMMA sheets. Step 7: Packaging: Packing, encapsulating, labeling and loading the post-processed PMMA sheets; The PMMA sheet auxiliary loading and unloading device comprises: loading and unloading area (1); A transport mechanism (2), wherein the number of the transport mechanisms (2) is multiple, and the multiple transport mechanisms (2) are arranged at intervals inside the loading and unloading area (1); A transfer mechanism (3) is arranged at the front side of the loading and unloading area (1) along the front-to-back direction; A controller (7) is arranged outside the transfer mechanism (3); A transport vehicle (8) located in front of the transfer mechanism (3); A tractor (9) located inside the loading and unloading area (1); The carrying mechanism (2) comprises: A scissor-type telescopic device (26) is mounted on the front bottom end of the mounting frame (25); The electromagnetic sucker (27) is arranged on the front side of the telescopic end of the scissor-type telescoping device (26).

2. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 1, characterized in that: In step (six), the steps of loading and unloading the PMMA sheets using the PMMA sheet auxiliary loading and unloading device are as follows: driving the carrier (8) to transport the PMMA sheets in the plurality of surface treatment devices and transport them centrally to the interior of the transfer mechanism (3); driving the tractor (9) to tow the single carrier (2) in the loading and unloading area (1) into the interior of the transfer mechanism (3); transferring the PMMA sheets through the transfer mechanism (3) and placing them centrally and orderly inside the carrier (2) for centralized storage; and then driving the tractor (9) to tow the carrier (2) loaded with the PMMA sheets out of the interior of the transfer mechanism (3) for subsequent packaging processing.

3. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 2, characterized in that: The carrying mechanism (2) further comprises: A transport frame (21), wherein the transport frame (21) is connectable to a tractor (9), and the tractor (9) is capable of driving the transport frame (21) to move inside the loading and unloading area (1) and the transfer mechanism (3); Track frames (22), the number of the track frames (22) is multiple, and the multiple track frames (22) are arranged at intervals from top to bottom on the inner side of the carrier frame (21); A tray (23), wherein the number of the trays (23) is several, and the several trays (23) are respectively plugged into the top of the several track frames (22), the bottom of the tray (23) is provided with a guide wheel capable of moving on the top of the tray (23), and the electromagnetic suction cup (27) can be magnetically attracted to the rear side of the tray (23) to achieve connection; An electric telescopic rod (24), wherein the number of the electric telescopic rods (24) is two, and the two electric telescopic rods (24) are respectively mounted on the left and right ends of the rear side of the carrier frame (21); A mounting frame (25) is provided on the top of the telescopic ends of the left and right electric telescopic rods (24), and the mounting frame (25) is T-shaped; A control module (28) is provided at the rear bottom end of the carrier frame (21), and the control module (28) is electrically connected to the electric telescopic rod (24), the scissor-type telescopic device (26) and the electromagnetic suction cup (27), respectively. The control module (28) is remotely connected to the controller (7) via a network.

4. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 3, characterized in that: The transfer mechanism (3) comprises: A transfer mechanism housing (31) is arranged at the front side of the loading and unloading area (1) along the front-to-back direction; Purification modules (32), the number of the purification modules (32) is two, and the two purification modules (32) are respectively embedded in the front and rear sides above the inner cavity of the transfer mechanism shell (31), and the purification modules (32) are electrically connected to the controller (7); Electric sealing doors (33), the number of the electric sealing doors (33) is two, the two electric sealing doors (33) are respectively embedded in the middle of the bottom ends of the front and rear sides of the inner cavity of the transfer mechanism shell (31), and the electric sealing doors (33) are electrically connected to the controller (7); Infrared sensors (34), the number of the infrared sensors (34) is two, and the two infrared sensors (34) are respectively arranged at the front and rear ends of the right side of the bottom end of the inner cavity of the transfer mechanism housing (31), and the infrared sensors (34) are electrically connected to the controller (7); A first ground rail (35) is arranged in the middle of the front side of the bottom end of the inner cavity of the transfer mechanism housing (31) along the front-back direction, and the first ground rail (35) is electrically connected to the controller (7); A rotating base (36) is mounted on the top of the moving end of the first ground rail (35), and the rotating base (36) is electrically connected to the controller (7); A transport assembly (4), wherein the number of the transport assemblies (4) is two, and the two transport assemblies (4) are respectively arranged on the front and rear sides of the rotating end of the rotating base (36); The placing components (5) are provided in two groups, each group of the placing components (5) is provided with two placing components (5), and the two groups of the placing components (5) are respectively provided at the left and right ends of the rear side of the transfer mechanism housing (31).

5. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 4, characterized in that: The transport assembly (4) comprises: A base (41) is arranged on the top of the rotating base (36) in the up-down direction; A limiting guide rail (42) is arranged on the outer side of the base (41) in the up-down direction; A housing (43) is arranged outside the movable end of the limiting guide rail (42); A steel cable unwinder (44) is installed on the top of the base (41), wherein the internal steel cable of the steel cable unwinder (44) is connected to the top of the housing (43), and the steel cable unwinder (44) controls the lifting and lowering of the housing (43) by automatically unwinding and winding the internal steel cable. The steel cable unwinder (44) is electrically connected to the controller (7); A rotating arm (45) is rotatably connected to the inner side of the housing (43) via a pin in a front-to-rear direction; A pneumatic suction cup (46) is rotatably connected to the outer end of the rotating arm (45) via a pin shaft, and the pneumatic suction cup (46) is electrically connected to the controller (7); A guide rail frame (47) is arranged on the inner side of the top end of the rotating arm (45); A first motor (48) is fixedly mounted on the top of the housing (43), and the first motor (48) is electrically connected to the controller (7); A rotating rod (49), one end of which is screw-connected to the rotating end of the first motor (48); A limiting wheel (410) is provided at the bottom of the other end of the rotating rod (49), and the limiting wheel (410) can be plugged into the inner side of the guide rail frame (47); A bevel gear set (411) is arranged on the inner side of the bottom end of the rotating arm (45), and the bevel gear set (411) is two bevel gears that are vertically meshed; A second motor (412) is provided at the bottom end of the rotating arm (45), an output end of the second motor (412) is screw-connected to a gear on one side of the bevel gear set (411), and the second motor (412) is electrically connected to the controller (7); A first connecting rod (413), the number of the first connecting rods (413) is two, one end of each of the two first connecting rods (413) being fixedly connected to the outer wall of the axis of the pneumatic suction cup (46) and the other side gear axis of the bevel gear set (411); A rotating rod (414), wherein both ends of the rotating rod (414) are respectively rotatably connected to the other ends of the two first connecting rods (413) via pins.

6. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 5, characterized in that: The placement component (5) comprises: A second ground rail (51) is provided at the bottom of the inner cavity of the transfer mechanism housing (31), and the second ground rail (51) is electrically connected to the controller (7); An elevator (52) is provided at the moving end of the second ground rail (51), and the elevator (52) is electrically connected to the controller (7); A box body (53) is arranged at the top of the lifting end of the elevator (52), and a feeding port and a discharging port are respectively provided on the outer top and inner bottom of the outer wall of the box body (53); The transport unit (6) is arranged in the inner cavity of the box body (53).

7. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 6, characterized in that: The transport unit (6) comprises: A transport unit mounting frame (61) is arranged inside the bottom end of the inner cavity of the box body (53); A track frame (62) is arranged on the inner side of the top end of the inner cavity of the transport unit mounting frame (61), and the track frame (62) extends into the inner side of the discharge port of the inner cavity of the box body (53); a third motor (63) disposed on the front side of the track frame (62), an output end of the third motor (63) extending into the inner side of the track frame (62), and the third motor (63) being electrically connected to the controller (7); A roller (64) is mounted on the output end of the third motor (63) in the front-to-back direction, and a plurality of slots are provided on the outer wall of the roller (64) at intervals along the axial direction; A rotating frame (65), wherein the number of the rotating frames (65) is two groups, and the number of the rotating frames (65) in each group is two. The two groups of rotating frames (65) are rotatably connected to the inner and outer sides of the front and rear ends of the inner side of the transport unit mounting frame (61) through pins, and the axis of the front rotating frame (65) extends out of the outer wall of the transport unit mounting frame (61); A movable card base frame (66), wherein the number of the movable card base frames (66) is two, and the two movable card base frames (66) are respectively connected to the top of the two groups of rotating frames (65) by rotating pins in the left and right directions; A connecting pulley (67), wherein the number of the connecting pulleys (67) is two, and the two connecting pulleys (67) are respectively connected to the axis of the front rotating frame (65) by a key; a fourth motor (68) disposed at the inner bottom end of the transport unit mounting frame (61), an output end of the fourth motor (68) extending out of the front side of the transport unit mounting frame (61), and the fourth motor (68) being electrically connected to the controller (7); A driving pulley (69) screwed to an output end of the driving pulley (69); A connecting belt (610) is provided on the front side of the transport unit mounting frame (61), and the inner side of the connecting belt (610) is respectively sleeved with the outer walls of the left and right connecting pulleys (67) and the driving pulley (69); A fixed card base frame (611) is provided. The number of the fixed card base frames (611) is two, and the two fixed card base frames (611) are respectively arranged at the front and rear sides of the inner top of the transport unit mounting frame (61).

8. The method for synthesizing an optical-grade PMMA sheet in one step according to claim 7, characterized in that: The transport unit (6) further comprises: A storage shell (612) is arranged at the bottom end of the inner cavity of the box body (53) and is located outside the transport unit mounting frame (61), and the storage shell (612) is located below the feed port of the inner cavity of the box body (53); A through groove (613) is provided at the top inner side of the inner cavity of the storage housing (612); A guide plate (614) is arranged in a downwardly inclined manner on the inner side of the outer wall of the storage housing (612) and is located below the through slot (613); A bottom plate (615) is arranged downwardly and tilted toward the outside of the top end of the inner cavity of the storage housing (612); A rotating seat (616) is rotatably connected to the inner side of the storage shell (612) via a pin seat and is located at the top of the box body (53); A second connecting rod (617), one end of which is rotatably connected to one end of the rotating seat (616) via a pin; A push seat (618) is provided at the top of the other end of the second connecting rod (617), the top end of the push seat (618) being in the shape of an inclined surface, and the thickness of the push seat (618) being the same as the distance between the inner side of the bottom plate (615) and the inner wall of the storage shell (612); A limiting groove (619) is provided on the inner side of the other end of the rotating seat (616); a socket (620) disposed on the inner wall of the box body (53) and located outside the inner cavity of the storage shell (612); the socket (620) is located below the bottom plate (615); An insertion rod (621) is inserted into the inner side of the socket (620) in the up-down direction; A limiting rod (622) is provided at the bottom end of the insertion rod (621), and the limiting rod (622) is plugged into the inner cavity of the limiting groove (619); A ball-end connecting rod (623), one end of which is rotatably connected to the top end of the insertion rod (621) via a pin; A ball head eccentric seat (625), one end of which is connected to the top end of the ball head connecting rod (623); The fifth motor (626) is arranged above the socket (620), the output end of the fifth motor (626) is fixedly connected to the axis of the ball head eccentric seat (625), and the fifth motor (626) is electrically connected to the controller (7).

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