CN210791973U

CN210791973U - Automatic production line for ultra-wide projection screen PC sheet

Info

Publication number: CN210791973U
Application number: CN201921758132.5U
Authority: CN
Inventors: 杨新生
Original assignee: Chongqing Ronghao Taishi Science And Technology Co ltd
Current assignee: Chongqing Ronghao Taishi Science And Technology Co ltd
Priority date: 2019-10-20
Filing date: 2019-10-20
Publication date: 2020-06-19
Anticipated expiration: 2029-10-20

Abstract

An automatic production line of PC sheets of an ultra-wide projection screen comprises a raw material conveying system, an extrusion system, a forming system, a thickness measuring system, a cooling system, a film covering system, a traction system, a slitting machine, a transverse cutting machine and a winding system; the raw material conveying system comprises a storage box, a crystallization dryer and a vacuum feeding machine; the extrusion system is provided with a host hopper, a single-screw extruder, a screen changer, a metering pump and an extrusion die, wherein a feed port of the metering pump is communicated with a discharge port of the screen changer, and a discharge port of the metering pump is communicated with a feed port of the extrusion die; the forming system comprises a three-roller forming machine and a roller temperature controller, and the lower roller and the middle roller correspond to the output end of the extrusion die; the cooling system is provided with a water cooling roller and a cooling bracket; a thickness gauge of the thickness measuring system is positioned between the water cooling roller and the cooling bracket; the tractor of the traction system is connected with the cooling bracket, the film laminating system is provided with an upper film laminating mechanism and a lower film laminating mechanism, the slitting machine is positioned at the output end of the tractor, and the transverse cutting machine is arranged behind the slitting machine.

Description

Automatic production line for ultra-wide projection screen PC sheet

Technical Field

The utility model relates to a production line, in particular to automatic production line of super wide projection screen PC sheet.

Background

Polycarbonate (abbreviated as PC) which is one of five engineering plastics is rapidly developed due to excellent comprehensive properties and outstanding physical, mechanical and thermal properties. In 2015, the domestic PC raw material breaks through the monopoly abroad, the capacity and the yield are rapidly improved, and the market demand of PC products is further stimulated. In recent years, PC boards have been widely used in the construction industry, the automotive industry, electronic and electrical products, medical treatment, aerospace, optical lenses, and other fields. With the development of projection electric appliances, projection screens made of PC materials are beginning to enter the market, and the optical effect of the projection screens made of the PC materials is far superior to that of the projection screens made of the existing cloth materials. However, because of the characteristics of PC materials, special equipment is needed to manufacture PC materials into sheets for projection screens, and the existing equipment for manufacturing PC projection screens in the world can only produce PC sheets with small width, the width of the PC sheets does not exceed 2 meters, once the width exceeds 2 meters, the thickness uniformity and the density of the PC sheets cannot be guaranteed, the equipment performance is also affected, and it is difficult to produce PC sheets for projection screens with width exceeding 2 meters, so that the existing PC sheet projection screens with width exceeding 2 meters are usually formed by splicing a plurality of PC sheets with width below 2 meters. The spliced projection screen always has splicing seams, and the viewing effect of a projection video is seriously influenced. Along with the development, the social demand for the ultra-wide PC sheet projection screen with the width more than 2 meters is larger, how to solve the problem that the manufacturing of the ultra-wide projection screen PC sheet is difficult to solve is also solved, and the technical requirements of the ultra-wide projection screen PC sheet cannot be solved by the existing production equipment.

Disclosure of Invention

The utility model aims at prior art not enough, provide an automatic production line of super wide projection screen PC sheet, its manufacturing that can accomplish 5 meters super wide projection screen PC sheet.

The technical scheme of the utility model is that: an automatic production line of PC sheets of ultra-wide projection screens comprises a raw material conveying system, an extrusion system, a forming system, a thickness measuring system, a cooling system, a film covering system, a traction system, a slitting machine and a transverse cutting machine; the raw material conveying system comprises a storage box for storing raw materials, a crystallization dryer for crystallizing the raw materials and a vacuum feeding machine for conveying the raw materials; the extrusion system comprises a host hopper, a single-screw extruder for heating and plasticizing the raw material, a screen changer for filtering impurities, a metering pump for quantitatively outputting the raw material and an extrusion die with the discharging width larger than 5 meters, wherein the host hopper is positioned below the vacuum feeding machine, the feeding hole of the metering pump is communicated with the discharging hole of the screen changer, and the discharging hole of the metering pump is communicated with the feeding hole of the extrusion die; the forming system comprises a three-roller forming machine with the roller length larger than 5 m and a roller temperature controller, wherein the lower roller and the middle roller of the three-roller forming machine correspond to the output end of the extrusion die; the cooling system is provided with five groups of water cooling rollers and cooling brackets, and the water cooling rollers are positioned between the three-roller forming machine and the cooling brackets; the thickness gauge of the thickness measuring system is positioned between the water cooling roller and the cooling bracket and is used for measuring the thickness of the PC sheet; the traction system's tractor is connected with the cooling bracket, the tectorial membrane system includes tectorial membrane mechanism and lower tectorial membrane mechanism, it is located the top of cooling bracket to go up tectorial membrane mechanism, lower tectorial membrane mechanism is located the below of cooling bracket, the slitter is located the output of tractor, and the both sides of slitter set up vertical cutter respectively, the rear of slitter sets up the crosscut machine.

The raw material conveying system is internally provided with two sets of vacuum feeding machines, the raw material conveying speed of the two sets of vacuum feeding machines is 1500kg/h, and the crystallization drying speed of the crystallization drying machine is 1500 kg/h.

The three-roller forming machine is characterized in that an oil-heating roller is arranged in an upper roller, a middle roller and a lower roller of the three-roller forming machine, an oil inlet and an oil return port of heat conducting oil of the oil-heating roller are respectively arranged on two end shafts of the roller, the oil inlet is connected with a heat conducting oil heating device through an oil return pipe, the heat conducting oil heating device is connected with a roller temperature controller, the roller temperature controller comprises three temperature controllers, the temperatures of the upper roller, the middle roller and the lower roller of the three-roller forming machine are respectively controlled by one temperature controller, and the temperature controllers monitor the temperature of the rollers through non-contact temperature sensors.

The two sides of an upper roller, a middle roller and a lower roller of the three-roller forming machine are respectively provided with a bearing seat, a self-aligning bearing is arranged in the bearing seats, the upper roller, the middle roller and the lower roller are respectively arranged in a U-shaped guide seat through the self-aligning bearing, the middle roller is a reference roller, and the position adjusting devices of the lower roller and the upper roller adopt double hydraulic cylinders.

The surfaces of the rollers of the three-roller forming machine are provided with patterns and need to be plated with chrome.

The metering pump is horizontally installed in an external row mode.

Dust suction devices are arranged beside the slitting machine and the transverse cutting machine.

Adopt above-mentioned technical scheme: the raw material conveying system comprises a storage box for storing raw materials, a crystallization dryer for crystallizing the raw materials and a vacuum feeding machine for conveying the raw materials, and the raw materials in the storage box are conveyed into the crystallization dryer through the vacuum feeding machine to be dried and crystallized. The main machine hopper is positioned below the vacuum feeding machine, a feeding hole of the metering pump is communicated with a discharging hole of the screen changer, the discharging hole of the metering pump is communicated with a feeding hole of the mold, the raw material processed by the crystallization dryer is conveyed to the main machine hopper by the vacuum feeding machine, the raw material in the main machine hopper is conveyed into the single-screw extruder, the raw material is heated and plasticized by the single-screw extruder, the raw material processed by the single-screw extruder is filtered by the screen changer, the metering pump quantitatively conveys the raw material subjected to impurity filtering to the extrusion mold, and the extrusion mold extrudes the raw material from the extrusion mold in a sheet form. Because the width of the extrusion die is more than 5 meters, the ultra-wide sheet-shaped raw material with the width of more than 5 meters can be extruded from the die. The forming system comprises a three-roller forming machine with the roller length larger than 5 m and a roller temperature controller, wherein the lower roller and the middle roller of the three-roller forming machine correspond to the output end of the extrusion die, sheet raw materials extruded from the extrusion die enter the three-roller forming machine, namely enter between the lower roller and the middle roller, the lower roller is lifted towards the middle roller to form enough pressure between the lower roller and the middle roller, so that the sheet raw materials between the lower roller and the middle roller are pressed into a PC sheet with a certain thickness, the PC sheet is driven to move forwards along with the rotation of the three rollers, and the continuous production of the PC sheet is ensured. The water cooling roller is positioned between the three-roller forming machine and the cooling bracket; the thickness gauge of the thickness measuring system is positioned between the water cooling roller and the cooling bracket and is used for measuring the thickness of the PC sheet; and a tractor of the traction system is connected with the cooling bracket, the molded PC sheet is cooled by the water cooling roller after being output from the upper roller, then the PC sheet is driven by the tractor to move forwards on the cooling bracket, and the PC sheet is further cooled on the cooling bracket. The upper laminating mechanism is located above the cooling bracket, the lower laminating mechanism is located below the cooling bracket, the slitting machine is located at the output end of the tractor, longitudinal cutters are arranged on two sides of the slitting machine respectively, a transverse cutting machine is arranged behind the slitting machine, and the upper surface and the lower surface of the PC sheet are respectively coated with a protective film through the upper laminating mechanism and the lower laminating mechanism, so that the surface of the PC sheet is prevented from being scratched. The PC sheet after being coated with the film is sent to a slitting machine by a tractor, slitting knives on two sides of the slitting machine cut waste materials on two sides of the PC sheet, then the PC sheet is sent to a transverse cutting machine, and the PC sheet is cut into qualified length by the transverse cutting machine. Because the width of the extrusion die is more than 5 meters and the roller length of the three-roller forming machine is more than 5 meters, the raw material with the width of more than 5 meters extruded by the extrusion die can be formed into the PC sheet material of the ultra-wide projection screen in the three-roller forming machine with the roller length of more than 5 meters.

The raw material conveying system is internally provided with two sets of vacuum feeding machines, the raw material conveying speed of the two sets of vacuum feeding machines is 1500kg/h, the crystallization drying speed of the crystallization drying machine is 1500kg/h, enough raw materials are provided for the whole production line, and the raw material requirement for manufacturing the ultra-wide projection screen sheet with the length of more than 5 meters is guaranteed.

The three-roller forming machine is characterized in that an oil-heating roller is arranged in an upper roller, a middle roller and a lower roller of the three-roller forming machine, an oil inlet and an oil return port of heat conducting oil of the oil-heating roller are respectively arranged on two end shafts of the roller, the oil inlet is connected with a heat conducting oil heating device through an oil return pipe, the heat conducting oil heating device is connected with a roller temperature controller, the roller temperature controller comprises three temperature controllers, the temperatures of the upper roller, the middle roller and the lower roller of the three-roller forming machine are respectively controlled by one temperature controller, and the temperature controllers monitor the temperature of the rollers through non-contact temperature sensors. The three-roller forming machine adopts an oil-heating type roller, and a roller temperature controller heats heat-conducting oil, so that the temperature of the roller is increased, the forming temperature of the PC sheet is ensured, and the oil-heating type three-roller forming machine has high heat transfer efficiency and good thermal stability. This temperature controller passes through non-contact temperature sensor monitoring roller temperature, and non-contact temperature sensor need not install on the roller, consequently can not rotate along with the roller and can monitor whether the roller temperature appears changing, is convenient for to the control of roller temperature.

The two sides of an upper roller, a middle roller and a lower roller of the three-roller forming machine are respectively provided with a bearing seat, a self-aligning bearing is arranged in the bearing seats, the upper roller, the middle roller and the lower roller are respectively arranged in a U-shaped guide seat through the self-aligning bearing, the middle roller is a reference roller, and the position adjusting devices of the lower roller and the upper roller adopt double hydraulic cylinders. In the manufacturing process, according to the thickness deviation of the fed-back PC sheet, the upper roller or the lower roller can adjust the height of the bearing seat, so that a certain angle is formed between the upper roller and the middle roller and between the lower roller and the middle roller, and the pressing force between the upper roller and the middle roller and between the lower roller and the middle roller are adjusted, thereby ensuring that the thicknesses of two ends of the formed PC sheet are consistent with the thickness of the middle part.

The metering pump adopts outer formula horizontal installation, can prevent that black spot or striae etc. from appearing in fashioned PC sheet surface.

Dust suction devices are arranged beside the slitting machine and the transverse cutting machine, and dust generated by cutting is cleaned through the dust suction devices, so that cleanness and no dust of a production site are guaranteed.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the thickness measuring system, the film covering system, the traction system, the slitting machine and the transverse cutting machine of the present invention;

FIG. 3 is a schematic diagram of the extrusion system, the forming system and the cooling system of the present invention;

fig. 4 is a schematic structural diagram of the raw material conveying system of the present invention.

In the attached drawing, 1 is a storage box, 2 is a crystallization dryer, 3 is a vacuum feeding machine, 4 is a single screw extruder, 5 is a main machine hopper, 6 is a screen changer, 7 is a metering pump, 8 is an extrusion die, 9 is a roller temperature controller, 10 is a three-roller forming machine, 10-1 is an upper roller, 10-2 is a middle roller, 10-3 is a lower roller, 11 is a water cooling roller, 12 is a thickness gauge, 13 is a cooling bracket, 14 is a lower film coating mechanism, 15 is an upper film coating mechanism, 16 is a tractor, 17 is a slitting machine, 18 is a transverse cutting machine, and 19 is a double hydraulic cylinder.

Detailed Description

Referring to fig. 1 to 4, an automatic production line for PC sheets of ultra-wide projection screens comprises a raw material conveying system, an extrusion system, a forming system, a thickness measuring system, a cooling system, a film covering system, a traction system, a slitting machine 17, a transverse cutting machine 18 and a winding system. The raw material conveying system comprises a storage box 1 for storing raw materials, a crystallization dryer 2 for crystallizing the raw materials and two sets of vacuum feeding machines 3 for conveying the raw materials, the storage box 1, the crystallization dryer 2 and the vacuum feeding machines 3 are communicated through pipelines, and the raw materials in the storage box 1 are conveyed to the crystallization dryer 2 through one set of vacuum feeding machines 3 to be dried. The raw material conveying speed of the two sets of vacuum feeding machines 3 is 1500kg/h, the crystallization drying speed of the crystallization drying machine 2 is 1500kg/h, enough raw materials are provided for the whole production line, and the raw material requirement for manufacturing the super-wide projection screen sheet with the length of more than 5 meters is guaranteed. The extrusion system comprises a main machine hopper 5, a single-screw extruder 4 for heating and plasticizing raw materials, a screen changer 6 for filtering impurities, a metering pump 7 for quantitatively outputting the raw materials and an extrusion die 8 with the discharging width larger than 5 m. The main machine hopper 5 is positioned below the vacuum feeding machine 3, the raw material dried by the crystallization drying machine 2 is conveyed to the main machine hopper 5 by another set of vacuum feeding machine 3, the main machine hopper 5 conveys the raw material to the single-screw extruder 4 for heating and plasticizing, the single-screw extruder 4 is heated by a heating device before production, and the temperature required by heating and plasticizing the raw material is kept in the production process all the time, so that the dried raw material is converted into a molten material. The feed inlet of measuring pump 7 communicates with each other with the discharge gate of trade wire stitcher 6, the discharge gate of measuring pump 7 communicates with the feed inlet of extrusion tooling 8, the melting form material after single screw extruder 4 heating plastify is carried and is traded in wire stitcher 6, filter out the impurity in the material through this trade wire stitcher 6, guarantee the purity of material, make the PC sheet quality of producing better, the material after the filtering impurity is sent into in measuring pump 7, give extrusion tooling 8 according to the required quantitative material of PC sheet by measuring pump 7, provide stable material for extrusion tooling 8. The metering pump 7 is installed horizontally in an outward-discharging mode, and black spots or transverse stripes and the like can be prevented from appearing on the surface of the molded PC sheet. A coat hanger type flow channel is arranged in the extrusion die 8, and the molten material is extruded into a sheet shape in the coat hanger type flow channel by the extrusion die 8. The forming system comprises a three-roller forming machine 10 with the roller length larger than 5 m and a roller temperature controller 9, wherein the space between a lower roller 10-3 and a middle roller 10-2 of the three-roller forming machine 10 corresponds to the output end of an extrusion die 8, and a sheet-shaped molten material extruded by the extrusion die 8 enters the three-roller forming machine 10. The roller temperature controller 9 comprises three temperature controllers, each temperature controller corresponds to a roller respectively, the temperature controller monitors the roller temperature through a non-contact temperature sensor, the temperature of the roller is required to be ensured to be about 150 ℃ due to the forming of a PC sheet, the roller is required to be heated to the temperature required by forming through each temperature controller before production and manufacture, the temperature of the roller is kept at the temperature required by forming by combining a heat preservation device of the roller, the non-contact temperature sensor is not required to be installed on the roller, whether the roller temperature changes or not can be monitored along with the rotation of the roller, and the control of the roller temperature is facilitated. The sheet-shaped molten material extruded from the extrusion die 8 enters a three-roller forming machine 10, namely enters between a lower roller 10-3 and a middle roller 10-2, the lower roller 10-3 is lifted towards the middle roller 10-2 to form enough pressure between the lower roller 10-3 and the middle roller 10-2, so that the sheet-shaped molten material between the lower roller 10-3 and the middle roller 10-2 is pressed into a PC sheet with uniform thickness, the middle roller 10-2 and the upper roller 10-1 also play a role in cooling the PC sheet along with the rotation of the rollers, the formed PC sheet is calendered by the upper roller 10-1, and the formed PC sheet moves forwards under the driving of the rotation of the three rollers, so that the continuous production of the PC sheet is ensured. The roller surfaces of the three-roller forming machine 10 are all provided with patterns and are required to be chromed, so that the patterns are uniformly distributed on the two surfaces of the formed PC sheet.

The cooling system is provided with five groups of water cooling rollers 11 and cooling brackets 13, wherein the water cooling rollers 11 are positioned between the three-roller forming machine 10 and the cooling brackets 13, and PC sheets formed by the three-roller forming machine 10 enter the cooling system to be cooled by the five groups of water cooling rollers 11. Thickness gauge 12 of thickness measurement system is located between water cooling roller 11 and the cooling bracket 13 for measure the thickness of PC sheet, through the PC sheet after cooling of water cooling roller 11 carry out thickness measurement to it by thickness gauge 12, thickness gauge 12 transmits the thickness data who records for extrusion tooling 8, and extrusion tooling 8 in this patent adopts full automatic mould, can be according to the thickness gauge 12 feedback data automatically regulated extruded sheet material's thickness. The tractor 16 of the traction system is connected to the cooling carriage 13, the PC sheet is moved forward with the cooling carriage 13 by the tractor 16, and the PC sheet can be further cooled on the cooling carriage 13. The laminating system comprises an upper laminating mechanism 15 and a lower laminating mechanism 14, wherein the upper laminating mechanism 15 is located above the cooling bracket 13, the lower laminating mechanism 14 is located below the cooling bracket 13, the upper surface and the lower surface of a PC sheet are respectively coated with a protective film by the upper laminating mechanism 15 and the lower laminating mechanism 14 when the PC sheet moves forwards, the surface of the PC sheet is prevented from being scratched, and the upper laminating mechanism 15 and the lower laminating mechanism 14 are used for laminating the PC sheet in a front-back crossed mode. The slitting machine 17 is located the output of tractor 16, and the both sides of slitting machine 17 set up vertical cutter respectively, slitting machine 17's rear sets up crosscut 18, and the PC sheet after the tectorial membrane conveys to slitting machine 17 by tractor 16, and the slitting cutter of slitting machine 17 both sides cuts off the waste material on PC sheet both sides, and, the slitting cutter of both sides can remove about the control and adjust the width between two slitting cutters, makes slitting machine 17 can adapt to the PC sheet of different width. The PC sheet material with the waste material cut off by the slitting machine 17 is transmitted to a transverse cutting machine 18, the transverse cutting machine cuts the PC sheet material into qualified length, the transverse cutting machine 18 also comprises a sheet material pressing mechanism, a sheet material supporting mechanism, a longitudinal advancing and retreating mechanism and a transverse cutting mechanism, the PC sheet material enters a cutting position through the sheet material supporting mechanism, the pressing mechanism presses the PC sheet material through the action of an air cylinder, the longitudinal advancing and retreating mechanism ensures that the transverse cutting platform and the production line synchronously move, and the transverse cutting mechanism cuts off the sheet material to ensure the required product specification. Dust suction devices are arranged beside the slitting machine 17 and the transverse cutting machine 18, and dust generated by cutting is cleaned through the dust suction devices, so that the cleanness and no dust of a production site are ensured.

The three-roller forming machine is characterized in that an oil-heating roller is arranged in an upper roller 10-1, a middle roller 10-2 and a lower roller 10-3 of the three-roller forming machine 10, an oil inlet and an oil return port of heat conducting oil of the oil-heating roller are respectively arranged on shafts at two ends of the roller, the oil inlet is connected with a heat conducting oil heating device through an oil inlet pipe, the oil return port is connected with a heat conducting oil heating device through an oil return pipe, the heat conducting oil heating device is connected with a roller temperature controller 9, the roller temperature controller 9 comprises three temperature controllers, the temperatures of the upper roller 10-1, the middle roller 10-2 and the lower roller 10-3 of the three-roller forming machine 10 are respectively controlled by one temperature controller, and the. The three-roller forming machine 10 adopts an oil-heating type roller, the roller temperature controller 9 heats heat-conducting oil, so that the temperature of the roller is increased, the forming temperature of the PC sheet is ensured, and the oil-heating type three-roller forming machine 10 is high in heat transfer efficiency and good in heat stability. This temperature controller passes through non-contact temperature sensor monitoring roller temperature, and non-contact temperature sensor need not install on the roller, consequently can not rotate along with the roller and can monitor whether the roller temperature appears changing, is convenient for to the control of roller temperature. Bearing seats are arranged on two sides of an upper roller 10-1, a middle roller 10-2 and a lower roller 10-3 of the three-roller forming machine 10, a self-aligning bearing is arranged in each bearing seat, the upper roller 10-1, the middle roller 10-2 and the lower roller 10-3 are arranged in a U-shaped guide seat through the self-aligning bearings respectively, the middle roller 10-2 is a reference roller, a position adjusting device of the lower roller 10-3 and the upper roller 10-1 adopts double hydraulic cylinders 19, the pressing force of the double hydraulic cylinders 19 is large, the pressure can be adjusted, and therefore a certain angle is formed between the upper roller 10-1, the lower roller 10-3 and the middle roller 10-2, the pressing force between the upper roller 10-1, the lower roller 10-3 and the middle roller 10-2 is adjusted, and the thicknesses of two ends of a formed PC sheet are consistent with the thickness of the. In order to make the lifting speeds of the rollers of the three-roller forming machine 10 consistent, the oil inlets of the double hydraulic cylinders 19 are small in pipe diameter, the ascending sections are guaranteed to be slow and stable, impact is reduced, the oil outlets are large in pipe diameter, and the rollers can be guaranteed to be opened quickly in emergency.

The utility model discloses a width from extrusion tooling 8 in the production line is greater than 5 meters, and the roller length of three roller forming machine 10 is greater than 5 meters, consequently the width extruded through extrusion tooling 8 surpasss 5 meters's slice fuse-element can surpass 5 meters's super wide projection screen's of super wide projection screen of shaping width in the three roller forming machine 10 of roller length surpassing 5 meters PC sheet, and can guarantee by position adjusting device that the thickness of PC sheet is even to guarantee the projection effect of projection screen. And the utility model discloses not only be limited to the PC sheet that makes the width and exceed 5 meters, because the slitter knife passenger of slitter 17 both sides removes, consequently can also utilize the utility model discloses it is equally feasible to make the PC sheet below the width 5 meters. In addition, under the condition that the same output required, can solve the problem that the output of single production line is low, reduce the energy consumption, practice thrift the place, for example will produce 1000kg/h output, the production line of little broad width probably needs 2 to 3 production lines, and adopts the utility model discloses, only need a production line can solve this problem.

Claims

1. The utility model provides an automatic production line of super wide projection screen PC sheet which characterized in that: comprises a raw material conveying system, an extrusion system, a forming system, a thickness measuring system, a cooling system, a film covering system, a traction system, a slitting machine (17), a transverse cutting machine (18) and a rolling system; the raw material conveying system comprises a storage box (1) for storing raw materials, a crystallization dryer (2) for crystallizing the raw materials and a vacuum feeding machine (3) for conveying the raw materials; the extrusion system comprises a host hopper (5), a single-screw extruder (4) for heating and plasticizing raw materials, a screen changer (6) for filtering impurities, a metering pump (7) for quantitatively outputting the raw materials and an extrusion die (8) with the discharge width larger than 5 m, wherein the host hopper (5) is positioned below the vacuum feeding machine (3), the feed inlet of the metering pump (7) is communicated with the discharge outlet of the screen changer (6), and the discharge outlet of the metering pump (7) is communicated with the feed inlet of the extrusion die (8); the forming system comprises a three-roller forming machine (10) with the roller length larger than 5 m and a roller temperature controller (9), wherein the lower roller and the middle roller of the three-roller forming machine (10) correspond to the output end of the extrusion die (8); the cooling system is provided with five groups of water-through cooling rollers (11) and cooling brackets (13), and the water-through cooling rollers (11) are positioned between the three-roller forming machine (10) and the cooling brackets (13); the thickness gauge (12) of the thickness measuring system is positioned between the water cooling roller (11) and the cooling bracket (13) and is used for measuring the thickness of the PC sheet; traction system's tractor (16) are connected with cooling bracket (13), the tectorial membrane system includes tectorial membrane mechanism (15) and lower tectorial membrane mechanism (14), it is located the top of cooling bracket (13) to go up tectorial membrane mechanism (15), tectorial membrane mechanism (14) are located the below of cooling bracket (13) down, slitter (17) are located the output of tractor (16), and the both sides of slitter (17) set up vertical cutter respectively, the rear of slitter (17) sets up crosscut machine (18).

2. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: the raw material conveying system is internally provided with two sets of vacuum feeding machines (3), the raw material conveying speed of the two sets of vacuum feeding machines (3) is 1500kg/h, and the crystallization drying speed of the crystallization drying machine (2) is 1500 kg/h.

3. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: the oil-heating type three-roller forming machine is characterized in that an oil-heating type roller is arranged in an upper roller (10-1), a middle roller (10-2) and a lower roller (10-3) of the three-roller forming machine (10), an oil inlet and an oil return port of heat conducting oil of the oil-heating type roller are respectively arranged on shafts at two ends of the roller, the oil inlet is connected with a heat conducting oil heating device through an oil inlet pipe, the oil return port is connected with a heat conducting oil heating device through an oil return pipe, the heat conducting oil heating device is connected with a roller temperature controller (9) in a connecting mode, the roller temperature controller (9) comprises three temperature controllers, the temperatures of the upper roller (10-1), the middle roller (10-2) and the lower roller (10-3) of the three-roller forming machine (10).

4. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: bearing seats are arranged on two sides of an upper roller (10-1), a middle roller (10-2) and a lower roller (10-3) of the three-roller forming machine (10), a self-aligning bearing is arranged in each bearing seat, the upper roller, the middle roller and the lower roller are arranged in a U-shaped guide seat through the self-aligning bearing respectively, the middle roller (10-2) is a reference roller, and double hydraulic cylinders (19) are adopted as position adjusting devices of the lower roller (10-3) and the upper roller (10-1).

5. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: the surfaces of the rollers of the three-roller forming machine (10) are provided with patterns and need to be plated with chrome.

6. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: the metering pump (7) is installed horizontally in an external discharge mode.

7. The automated manufacturing line for ultra-wide projection screen PC sheeting of claim 1, wherein: dust suction devices are arranged beside the slitting machine (17) and the transverse cutting machine (18).