Shaping equipment for optical sheet production

Abstract

The utility model discloses shaping equipment for optical sheet production, which comprises a calender and a cooling shaping roller set, an optical sheet is conveyed from front to back, and the calender comprises a rack and three calender rollers which are sequentially and rotatably mounted at the top of the rack from front to back; the cooling and shaping roller group comprises a mounting frame and a plurality of cooling rollers which are mounted on the mounting frame at intervals from front to back; the mounting frame is configured to be connected to the rear end part of the rack in a manner of swinging up and down, the plurality of cooling rollers are in transmission connection with the same driving motor, and the rotating speeds of the plurality of cooling rollers are consistent; the cooling runners in the plurality of cooling rollers are sequentially communicated to form a cooling passage for conveying cooling water from back to front, and the cooling passage is communicated with an external temperature control system; countercurrent flow heat exchange is conducted between the cooling shaping roller set and the optical sheet, the heat exchange efficiency is improved, the forming characteristic of the optical sheet is met, and it is guaranteed that the formed optical sheet is transparent, flat and good in optical performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical sheet production equipment, in particular to a shaping equipment for optical sheet production. BACKGROUND

[0002] Optical sheet needs to be shaped and cooled during production to stabilize the shape and eliminate internal stress, so as to produce sheet products with stable quality. In the traditional process, the calender machine shapes and cools the blank extruded from the extrusion die through multiple rollers. The cooling temperature control is not accurate, which affects the uniformity of sheet crystallization and leads to the decline of optical performance of the sheet. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a shaping equipment for optical sheet production.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: a shaping equipment for optical sheet production, comprising a calender machine and a cooling shaping roller group installed at the rear end of the calender machine, the optical sheet is conveyed from front to rear on the calender machine and the cooling shaping roller group; the calender machine comprises a rack and three calender rollers rotatably installed in sequence on the top of the rack from front to rear, the cooling shaping roller group comprises a mounting rack and a plurality of cooling rollers installed in sequence on the mounting rack from front to rear; the mounting rack is configured to be connected to the rear end of the rack in an up-and-down swing manner, the plurality of cooling rollers are drivingly connected with the same driving motor, and the rotation speeds of the plurality of cooling rollers are consistent; each cooling roller is internally provided with a cooling flow channel, the cooling flow channels of the plurality of cooling rollers are sequentially communicated to form a cooling passage for conveying cooling water from rear to front, the cooling passage is communicated with an external temperature control system, and the temperature control system is configured to provide cooling water to the cooling passage.

[0005] In the above technical scheme, further preferably, the cooling passage comprises a water inlet pipe, a water outlet pipe and a plurality of U-shaped connecting pipes, the water inlet pipe is communicated with the cooling flow channel of the last cooling roller and the temperature control system, the water outlet pipe is communicated with the cooling flow channel of the first cooling roller and the temperature control system, and each U-shaped connecting pipe is communicated with the cooling flow channels of two adjacent cooling rollers to form a series cooling passage.

[0006] In the above technical scheme, further preferably, an adjusting valve is arranged at the water outlet pipe.

[0007] In the above technical scheme, further preferably, the roller surface temperature of the plurality of cooling rollers is 10-20℃.

[0008] In the above technical solution, it is further preferred that each of the cooling rollers is equipped with a temperature sensor, and the temperature sensor is connected to the temperature control system.

[0009] In the above technical solution, a further preferred embodiment is that the cooling and shaping roller group further includes an adjustment component and a support screw. One end of the support screw is hinged to the frame, and the other end is hinged to the middle of the mounting frame. The adjustment component is connected between the rear end of the frame and the front end of the mounting frame, and is used to drive the front end of the mounting frame to rise or fall.

[0010] In the above technical solution, it is further preferred that the plurality of cooling rollers are arranged in a horizontal straight line in the front-back direction.

[0011] In the above technical solution, a further preferred embodiment is that a transmission assembly is connected between the plurality of cooling rollers and the drive motor. The transmission assembly includes an output pulley connected to the drive motor, a synchronous pulley coaxially arranged for each of the cooling rollers, and a transmission belt that passes over the output pulley and the plurality of synchronous pulleys.

[0012] In the above technical solution, a further preferred embodiment is that the transmission assembly further includes multiple tensioning shafts, the multiple tensioning shafts and the multiple synchronous pulleys are arranged alternately in the front-rear direction, at least one tensioning shaft is installed between two adjacent synchronous pulleys, and the transmission belt passes around the synchronous pulleys and the tensioning shafts in an "S" shape.

[0013] Compared with the prior art, this application achieves the following beneficial effects:

[0014] The shaping equipment of this application has a simple structure and is easy to operate. The cooling shaping roller group installed on the rear side of the calender exchanges heat with the optical sheet in a countercurrent manner, which improves the heat exchange efficiency and conforms to the forming characteristics of the optical sheet, ensuring that the formed optical sheet is transparent, flat and has good optical performance. Attached Figure Description

[0015] Figure 1 A front view of a shaping device for optical sheet production provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 Top view of the finalized equipment in the middle;

[0017] Figure 3 for Figure 1 A three-dimensional structural diagram of the cooling and shaping roller assembly in the middle;

[0018] Figure 4 for Figure 3 A schematic diagram of the conveyor belt threading of the cooling and shaping roller assembly.

[0019] Wherein: 100, a shaping device; 10, a calender; 1, a frame; 2, a calender roller; 11, a gap adjusting mechanism; 12, a moving mechanism; 20, a cooling shaping roller group; 3, a mounting frame; 4, a cooling roller; 5, a driving motor; 6, a cooling passage; 61, a U-shaped connecting pipe; 7, an adjusting assembly; 71, an adjusting screw; 72, a screw nut; 8, a supporting screw; 9, a transmission assembly; 91, an output pulley; 92, a synchronous pulley; 93, a transmission belt; 94, a tensioning shaft. DETAILED DESCRIPTION

[0020] To describe the technical contents, structural features, achieved purposes and effects of the application, the technical solutions in the embodiments of the application will be described in combination with the drawings of the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. In the following description, for the purpose of explanation, a large number of specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the application. However, various exemplary embodiments can also be implemented without these specific details or in one or more equivalent arrangements. In addition, various exemplary embodiments can be different, but not necessarily exclusive. For example, the specific shape, structure and characteristics of an exemplary embodiment can be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0021] The embodiment of the application provides a shaping device for optical sheet production, which performs calendering and cooling shaping on a sheet-shaped blank extruded by an extrusion die according to the shaping characteristics of the optical sheet, so that the shaped optical sheet is transparent, flat and has good optical performance.

[0022] As shown in Figure 1 , 2 The shaping device 100 includes a calender 10 and a cooling shaping roller group 20 mounted at the rear end of the calender 10, the calender 10 includes a frame 1 and three calender rollers 2 sequentially rotating from front to back and mounted on the top of the frame 1, and the cooling shaping roller group 20 includes a mounting frame 3 and a plurality of cooling rollers 4 mounted on the mounting frame 3 at intervals from front to back, and the optical sheet is conveyed on the calender 10 and the cooling shaping roller group 20 from front to back.

[0023] The frontmost calender roller 2 and the last calender roller 2 of the three calender rollers 2 are movably installed on the frame 1 in the front-rear direction, and the middle calender roller 2 cannot move in the front-rear direction. A gap adjusting mechanism 11 is arranged between the frame 1 and the frontmost calender roller 2 and the last calender roller 2, respectively. The distance between the middle calender roller 2 and the frontmost calender roller 2 and the last calender roller 2 is adjusted by moving the frontmost calender roller 2 and the last calender roller 2 in the front-rear direction through the gap adjusting mechanism 11, so that the calender 10 can be suitable for the production of optical sheet materials with different thicknesses. The extrusion die is aligned with the gap between the frontmost calender roller 2 and the middle calender roller 2, and the extruded sheet material is successively conveyed to the cooling and shaping roller set 20 after passing through the middle calender roller 2 and the last calender roller 2. The gap adjustment between the three calender rollers 2 ensures that the optical sheet material is smooth and has uniform thickness. The bottom of the frame 1 is provided with a moving mechanism 12, and the entire calender 10 can move in the front-rear direction through the moving mechanism 12, so as to facilitate the cleaning and maintenance of the extrusion die.

[0024] As shown in Figure 1 、 3 , the plurality of cooling rollers 4 all extend in the left-right direction and are rotatably mounted on the mounting frame 3 about their own axis. The plurality of cooling rollers 4 are arranged in a horizontal straight line in the front-rear direction to be able to flatly support the optical sheet material output by the calender 10. The mounting frame 3 of the cooling and shaping roller set 20 is configured to be connected to the rear end of the frame 1 in a swingable manner up and down, and the plurality of cooling rollers 4 are drivingly connected to the same driving motor 5 to rotate at the same speed under the drive of the same driving motor 5, thereby ensuring the flatness of the optical sheet material.

[0025] The three calender rollers 2 and the plurality of cooling rollers 4 are all mirror rollers, thereby ensuring the smoothness of the surface of the optical sheet material during the calendering and cooling process, so that the sheet material meets the optical grade requirements.

[0026] As shown in Figure 3 、 4 , the plurality of cooling rollers 4 are connected with the driving motor 5 through a transmission assembly 9. The transmission assembly 9 includes an output pulley 91 connected to the driving motor 5, a synchronous pulley 92 coaxially arranged on each cooling roller 4, and a transmission belt 93 passing through the output pulley 91 and the plurality of synchronous pulleys 92. The driving motor 5 drives the output pulley 91 to rotate about its own axis, and the transmission belt 93 passing through the output pulley 91 drives the plurality of synchronous pulleys 92 to rotate synchronously at the same speed. The driving motor 5 is synchronized with the motor in the calender 10 that drives the rotation of the three calender rollers 2, so as to ensure that the conveying speed of the optical sheet material at the calender 10 and at the cooling and shaping roller set 20 is consistent, thereby avoiding the optical sheet material being stretched or wrinkled due to the difference in conveying speed, and ensuring the flatness of the optical sheet material.

[0027] The transmission assembly 9 further comprises a plurality of tensioning shafts 94, the plurality of tensioning shafts 94 and the plurality of synchronous pulleys 92 are arranged alternately in the front-rear direction, at least one tensioning shaft 94 is installed between two adjacent synchronous pulleys 92, and the transmission belt 93 is wound around the synchronous pulleys 92 and the tensioning shafts 94 in sequence in the "S" shape, and can be taut between the synchronous pulleys 92 and the output pulley 91 to avoid slippage of the transmission belt 93 on each pulley.

[0028] The inside of each cooling roller 4 is provided with a cooling flow channel, and the cooling flow channels of the plurality of cooling rollers 4 are sequentially communicated from back to front to form a cooling passage 6, which is communicated with an external temperature control system. The cooling passage 6 is communicated with the temperature control system, and the cooling water is transported from back to front. The temperature control system is used to control the roller surface temperature of each cooling roller 4, so that the roller surface temperature of the plurality of cooling rollers 4 is maintained at 10-20℃, which is helpful for the cooling and shaping of the optical sheet.

[0029] The cooling passage 6 comprises a water inlet pipe (not shown in the figure), a water outlet pipe (not shown in the figure) and a plurality of U-shaped connecting pipes 61. The water inlet pipe is communicated with the cooling flow channel of the last cooling roller 4 and the temperature control system, and the water outlet pipe is communicated with the cooling flow channel of the first cooling roller 4 and the temperature control system. The water inlet of each cooling roller 4 is located on the same side as the water outlet of the cooling roller 4 behind it and is communicated by a U-shaped connecting pipe 61. The water outlet of each cooling roller 4 is located on the same side as the water inlet of the cooling roller 4 in front of it and is communicated by a U-shaped connecting pipe 61. Thus, the cooling flow channels of the plurality of cooling rollers 4 are connected in series to form a one-way cooling passage 6 from back to front. The temperature control system continuously circulates the cooling water from the water inlet pipe to the cooling passage 6 to maintain the roller surface temperature of each cooling roller 4 at 10-20℃.

[0030] A temperature sensor (not shown in the figure) is installed on each cooling roller 4, and the plurality of temperature sensors are signal-connected with the temperature control system. An adjusting valve (not shown in the figure) is also installed at the water outlet pipe. When the temperature sensor detects that the roller surface temperature is higher than the set temperature range, the opening range of the adjusting valve is opened to increase the flow, so that the flow rate of the cooling water in the cooling passage 6 is increased, and the roller surface temperature of each cooling roller 4 is quickly reduced. When the temperature sensor detects that the roller surface temperature is lower than the set temperature range, the opening range of the adjusting valve is closed to reduce the flow, so that the flow rate of the cooling water in the cooling passage 6 is reduced, until the roller surface temperature rises to the preset temperature range.

[0031] Cooling water is conveyed from back to front in the cooling and shaping roller group 20, which is opposite to the conveying direction of the optical sheet. During the conveying process, it exchanges heat with the sheet through the cooling rollers. Therefore, the temperature of the cooling water is higher as it is conveyed forward. The heat exchange efficiency is improved by countercurrent heat exchange. Based on the temperature change of the cooling water, the surface temperature of the cooling roller 4 of the cooling and shaping roller group 20 gradually decreases from front to back, naturally forming a temperature gradient. This meets the process requirements of the optical sheet to be cooled and shaped step by step from front to back, which is in line with the crystallization and forming characteristics of the optical sheet. This makes the optical sheet transparent, flat and with uniform stress release.

[0032] like Figure 1 , 3 As shown in Figure 4, the mounting frame 3 is connected to the rear end of the frame 1 via the adjusting assembly 7 and the support screw 8. One end of the support screw 8 is hinged to the frame 1, and the other end is hinged to the mounting frame 3, thus supporting the mounting frame 3 on the rear side of the frame 1 while also accommodating vertical adjustment. The adjusting assembly 7 is connected between the rear end of the frame 1 and the front end of the mounting frame 3, and is used to drive the front end of the mounting frame 3 to rise or fall. The adjusting assembly 7 includes an adjusting screw 71 connected to the mounting frame 3 and a screw nut 72 mounted on the frame 1. The adjusting screw 71 and the screw nut 72 are threaded together. When the adjusting screw 71 is rotated, it can move vertically relative to the screw nut 72, thereby causing the front end of the mounting frame 3 to swing up and down. The vertically adjustable mounting frame 3 allows the cooling and shaping roller assembly 20 to adapt to different process requirements, improving the flatness and optical performance of the optical sheet.

[0033] The cooling and shaping roller group 20 is connected to the frame 1 via the adjusting component 7 and the support screw 8, and is supported downstream of the three calendering rollers 2. It can move back and forth with the calender 10, eliminating the disassembly and assembly steps and saving production time.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A shaping apparatus for optical sheet production, characterized by, The optical sheet is conveyed from front to back on the calender and the cooling and shaping roller set; the calender comprises a frame and three calender rollers successively rotatably mounted on the top of the frame from front to back; the cooling and shaping roller set comprises a mounting frame and a plurality of cooling rollers which are spaced apart and mounted on the mounting frame from front to back; the mounting frame is configured to be connected to the rear end of the frame in a manner capable of swinging up and down; the plurality of cooling rollers are drivingly connected to the same driving motor, and the rotation speeds of the plurality of cooling rollers are consistent; the interior of each cooling roller is provided with a cooling flow channel, the cooling flow channels of the plurality of cooling rollers are successively communicated to form a cooling passage for conveying cooling water from back to front, and the cooling passage is communicated with an external temperature control system which is configured to supply cooling water to the cooling passage.

2. The sizing apparatus of claim 1, wherein, The cooling passage comprises an inlet pipe, an outlet pipe and a plurality of U-shaped connecting pipes; the inlet pipe is communicated with the cooling flow channel of the last cooling roller and the temperature control system; the outlet pipe is communicated with the cooling flow channel of the first cooling roller and the temperature control system; and each U-shaped connecting pipe is communicated with the cooling flow channels of two adjacent cooling rollers to form a series cooling passage.

3. The sizing apparatus of claim 2, wherein, An adjusting valve is arranged at the outlet pipe.

4. The sizing apparatus of claim 1, wherein, The roller surface temperature of the plurality of cooling rollers is 10-20℃.

5. The sizing apparatus of claim 1, wherein, A temperature sensor is arranged on each cooling roller, and the temperature sensor is signal connected to the temperature control system.

6. The sizing apparatus of claim 1, wherein, The cooling and shaping roller set further comprises an adjusting assembly and a supporting lead screw; one end of the supporting lead screw is hinged to the frame, and the other end is hinged to the middle part of the mounting frame; the adjusting assembly is connected between the rear end of the frame and the front end of the mounting frame, and is used to drive the front end of the mounting frame to ascend or descend.

7. The sizing apparatus of claim 1, wherein The plurality of cooling rollers are arranged in a horizontal straight line in the front-back direction.

8. The sizing apparatus of claim 1, wherein, A transmission assembly is connected between the plurality of cooling rollers and the driving motor; the transmission assembly comprises an output pulley connected to the driving motor, a synchronous pulley coaxially arranged on each cooling roller, and a transmission belt which passes through the output pulley and the plurality of synchronous pulleys.

9. The sizing apparatus of claim 8, wherein, The transmission assembly further comprises a plurality of tensioning shafts; the plurality of tensioning shafts and the plurality of synchronous pulleys are alternately arranged in the front-back direction; at least one tensioning shaft is arranged between two adjacent synchronous pulleys; and the transmission belt is successively wound around the synchronous pulleys and the tensioning shafts in an "S" shape.

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