A light guide plate manufacturing apparatus and method based on a punching process

Abstract

The application relates to the technical field of light guide plate manufacturing equipment, in particular to light guide plate manufacturing equipment and a light guide plate manufacturing method based on a stamping process, which comprises an upper stamping mechanism, the upper stamping mechanism comprises a pressurizing assembly for outputting stamping pressure, the lower side of the pressurizing assembly is sequentially connected with a first fixing base, a first heating base and a first forming plate; a forming groove is arranged on the first forming plate and extends along a first direction; a lower stamping mechanism comprises a second fixing base, a second heating base and a second forming plate which are sequentially fixedly connected from bottom to top; the central axes of the upper stamping mechanism and the lower stamping mechanism coincide, the pressurizing assembly drives the upper stamping mechanism to synchronously move up and down; a plurality of lower optical microstructures arranged along a second direction are arranged on the second forming plate, and the second direction is perpendicular to the first direction. The embodiment of the application can realize stamping of light guide plates with uneven thickness and high-precision microstructure copying.

Description

Technical Field

[0001] This application relates to the field of light guide plate manufacturing equipment technology, and in particular to a light guide plate manufacturing equipment and a light guide plate manufacturing method based on a stamping process. Background Technology

[0002] As a core optical component of flexible display devices, the molding quality of ultra-thin flexible light guide plates directly affects the optical performance of the display module. Currently, the main manufacturing methods for ultra-thin flexible light guide plates include injection molding, photolithography etching, and imprinting. Among these, imprinting has become the mainstream method due to its simple process and high production efficiency. However, existing imprinting processes are mainly based on roll imprinting, which can only produce planar light guide plates and makes it difficult to guarantee the precision of the microstructure on the light guide plate.

[0003] Therefore, existing stamping equipment is not effective when stamping light guide plates with uneven thickness and microstructures, and related technologies still need to be improved. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a light guide plate manufacturing equipment based on stamping process, which aims to solve the problem of low forming accuracy during stamping when the thickness of the light guide plate is uneven in the prior art.

[0005] The technical solution adopted by this application to solve the technical problem is as follows: a light guide plate manufacturing equipment based on stamping process, comprising: The upper stamping mechanism includes a pressure assembly for outputting stamping force. A first fixed base, a first heating base, and a first forming plate are sequentially connected to the lower side of the pressure assembly. A forming groove is provided on the first forming plate, and the forming groove extends along a first direction. The lower stamping mechanism includes a second fixed base, a second heating base, and a second forming plate that are fixedly connected from bottom to top; the central axes of the upper stamping mechanism and the lower stamping mechanism coincide, and the pressurizing component drives the upper stamping mechanism to move up and down synchronously; The second molding plate is provided with several lower optical microstructures arranged along a second direction, which is perpendicular to the first direction.

[0006] In some embodiments, the forming groove includes a bottom surface, a light-incident surface and a stepped surface disposed opposite to each other on both sides of the bottom surface, the light-incident surface being parallel to the vertical direction, and the stepped surface being inclined and extending at its lower end toward the side away from the light-incident surface.

[0007] In some embodiments, the lower optical microstructure is configured as a cone protruding from the second molding plate, and the bottom area of ​​the lower optical microstructure decreases linearly along the vertical direction.

[0008] In some embodiments, the first molding plate is further provided with an upper optical microstructure extending along a second direction, the cross-sectional profile of which is V-shaped.

[0009] In some embodiments, the second molding plate includes at least two of the lower optical microstructures, which are arranged along the first direction.

[0010] In some embodiments, both the first heating seat and the second heating seat include a metal base and several heating rods arranged in parallel inside the metal base.

[0011] In some embodiments, the first fixed seat and the second fixed seat further include a top support mechanism disposed opposite to each other. The top support mechanism includes a movable top rod, a limiting sleeve and a driving unit. The top rod is disposed in the limiting sleeve and the driving unit is disposed at the bottom of the limiting sleeve and is drivingly connected to the top rod. The end of the top rod is provided with a contact part with an arc surface structure.

[0012] In some embodiments, the first forming plate and the second forming plate are made of nickel or ceramic.

[0013] In some embodiments, both the upper stamping mechanism and the lower stamping mechanism include a high-temperature resistant film, which is respectively disposed between the first heating seat and the first forming plate, and between the second heating seat and the second forming plate.

[0014] Another technical solution adopted by this application to solve the technical problem is as follows: a method for manufacturing a light guide plate, using the light guide plate manufacturing equipment based on the stamping process as described above, the method comprising the following steps: Microstructures are processed on the surface of a nickel plate substrate by electroforming to obtain a first molding plate and a second molding plate. A molding groove is processed on the first molding plate. The first and second forming plates are assembled onto the equipment with their relative positions, and the gap adjustment and alignment accuracy adjustment are completed to form a forming channel. After the flexible PC roll is released by the unwinding mechanism, the flexible substrate is guided by the guide roller and the correction sensor, and then the flexible substrate is continuously conveyed to the forming channel at a preset speed. The first heating seat and the second heating seat are activated, and the heat is conducted to the first fixed seat and the second fixed seat, preheating the flexible PC roll substrate mounted on the second fixed seat to the molding temperature; When the pressurization component is activated, the forming channel closes, and the microstructure of the first forming plate and the second forming plate is accurately copied onto the upper and lower surfaces of the flexible substrate, and a semi-finished product is obtained by continuous imprinting. The embossed semi-finished product is cooled and shaped, and then cut to length and width using CCD positioning. The cut semi-finished product is then adsorbed onto a polishing machine for mirror polishing. The polished product is then inspected under a jig to obtain a qualified finished product.

[0015] Compared with existing technologies, this application firstly achieves bidirectional stamping of the light guide plate material by setting a symmetrical structure of upper and lower stamping mechanisms, which effectively ensures microstructure precision and product consistency compared to traditional roll forming with single-sided stamping. Secondly, by setting a forming groove extending along a first direction on the first forming plate and setting lower optical microstructures arranged along a second direction on the second forming plate, the integrated forming of the light guide plate thickness variation structure and the optical microstructure is achieved, simplifying the manufacturing process. Finally, by setting a heating seat and a high-temperature resistant film, the light guide plate material is heated and softened during the stamping process, reducing the forming difficulty and improving product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mold opening state of a light guide plate manufacturing equipment based on stamping process in this embodiment; Figure 2 This is a schematic diagram of the film-closing state of a light guide plate manufacturing equipment based on a stamping process in this embodiment; Figure 3 This is a partial enlarged structural diagram of the first forming plate and the second forming plate in this embodiment; Figure 4 This is a three-dimensional structural diagram of a light guide plate stamped by a light guide plate manufacturing equipment based on a stamping process according to this embodiment; Figure 5 This is a flowchart of a light guide plate manufacturing method based on stamping process in this embodiment.

[0017] Explanation of reference numerals in the attached figures: 10. Pressurizing component; 11. First fixing seat; 12. First heating seat; 13. First forming plate; 131. Forming groove; 20. Second fixing seat; 21. Second heating seat; 22. Second forming plate; 221. Lower optical microstructure; 30. Metal base; 31. Heating rod; 40. Top rod; 41. Contact part; 42. Limiting sleeve; 50. High temperature resistant film. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] As a core optical component of flexible display devices, the molding quality of ultra-thin flexible light guide plates directly affects the optical performance of the display module. Traditional flexible light guide plates are mostly single-planar structures, which have significant defects in multi-row LED or MiniLED scenarios. Traditional planar structures are prone to microstructural cracking when folded / bent, have weak bending stability, and light uniformity fluctuations of ≥5%. Due to the uniform overall thickness, the area corresponding to the LED cannot retain sufficient thickness for light conduction, resulting in low light utilization. Furthermore, the microstructure is easily damaged by concentrated pressure during imprinting.

[0022] In response, this embodiment proposes a light guide plate with varying thickness. One side of the light guide plate is the light-incident part, which has a thickness of 0.3 mm. The light guide part is imprinted to 0.2 mm. A light-incident step is provided between the light-incident part and the light guide part. The light-incident step is sloping to avoid damage during imprinting.

[0023] However, the existing manufacturing methods for ultra-thin flexible light guide plates mainly include injection molding, photolithography, and embossing. Among them, embossing has become the mainstream method due to its simple process and high production efficiency. However, the existing embossing process is mainly based on roll embossing. However, this embossing method can only press out a flat light guide plate and it is difficult to guarantee the microstructure precision on the light guide plate.

[0024] In this embodiment, a light guide plate manufacturing equipment based on stamping process is proposed. The light guide plate manufacturing equipment based on stamping process includes an upper stamping mechanism and a lower stamping mechanism.

[0025] The upper stamping mechanism includes a pressurizing component 10, which is used to output stamping force and can be a common pressure output device such as a hydraulic cylinder, a pneumatic cylinder, or an electric screw press. The pressurizing component 10 includes a first fixed seat 11 as a base, a first heating seat 12 disposed on the first fixed seat 11, and a first forming plate 13. The components are connected by bolts or welded to ensure the stability of the overall structure.

[0026] The first heating seat 12 is used to transfer heat to the first forming plate 13 during the stamping process, thereby heating the material. The heating temperature can be controlled within the softening temperature range of the light guide plate material, preferably between 80°C and 150°C, with the specific temperature determined based on the heat distortion temperature of the light guide plate material. The first heating seat 12 is internally equipped with a temperature sensor and a temperature control module to achieve precise temperature control.

[0027] In some embodiments, to achieve uneven thickness processing of the light guide plate through stamping, a forming groove 131 is provided on the first forming plate 13, the forming groove 131 extending along a first direction X. The forming groove 131 includes a bottom surface, a light-incident surface and a stepped surface disposed opposite to both sides of the bottom surface. The light-incident surface is parallel to the vertical direction Z and is used to form the sidewall of the light-incident portion of the light guide plate. The stepped surface is inclined and its lower end extends away from the light-incident surface, forming a sloping transition structure. A preset angle is formed between the light-incident surface and the stepped surface, preferably in the range of 30 degrees to 60 degrees, more preferably 45 degrees. The depth of the forming groove 131 is determined according to the thickness design of the light guide plate, and the vertical distance from the bottom surface to the light-incident surface determines the final thickness of the light-incident portion. By providing the forming groove 131, different thicknesses can be simultaneously stamped on the light guide plate during stamping, ensuring that the thickness of the light-incident portion of the processed light guide plate is greater than the diameter of the light-emitting LED, thus avoiding glare problems.

[0028] Specifically, the first direction and the second direction are on the same horizontal plane, and the second direction is the direction in which the light guide plate substrate enters the forming channel of the manufacturing equipment.

[0029] The lower stamping mechanism includes a second fixed seat 20, a second heating seat 21, and a second forming plate 22 connected sequentially from bottom to top. The structures of the second fixed seat 20 and the second heating seat 21 correspond to those of the first fixed seat 11 and the first heating seat 12, and the material selection and structural design principles are the same.

[0030] Those skilled in the art will understand that the components of the upper and lower stamping mechanisms are modularly designed, and the components are fixed together by bolts or vacuum adsorption. The forming plate can be quickly replaced as needed without replacing core components such as the heating seat.

[0031] The central axes of the upper and lower stamping mechanisms coincide, ensuring the symmetry and precision of the upper and lower stamping. The pressurizing component 10 drives the upper stamping mechanism to move up and down synchronously, realizing the stamping and forming of the light guide plate material disposed between the first forming plate 13 and the second forming plate 22. During operation, the rolled flexible substrate continuously passes through the forming channel formed by the first forming plate 13 and the second forming plate 22, realizing continuous stamping and forming.

[0032] like Figure 3 As shown, the second molding plate 22 is provided with several lower optical microstructures 221 arranged along the second direction Y. The second direction Y is perpendicular to the first direction X, forming an optical microstructure array. Specifically, the lower optical microstructures 221 are configured as cones protruding from the second molding plate 22, and can be square pyramids, octagonal pyramids, or cone structures. The base area of ​​the lower optical microstructures 221 decreases linearly along the vertical direction Z, that is, it gradually decreases from the bottom to the top, forming a pyramid or cone structure.

[0033] The top surface of the cone has a point-like or small-area planar structure to achieve uniform light distribution and efficient light transmission. Preferably, when the lower optical microstructure 221 is a conical structure, its base diameter D1 is in the range of 20μm to 50μm, its height H1 is in the range of 0.01μm to 0.02μm, and the ratio of the base area to the top area is preferably in the range of 1 to 500:1. The spacing L1 of the lower optical microstructures 221 in the second direction Y is in the range of 50μm to μm, and the spacing L2 in the first direction X is in the range of 50μm to μm, arranged in a uniform matrix.

[0034] The number and arrangement density of the lower optical microstructures 221 are determined according to the optical design requirements of the light guide plate, and can be set to tens to thousands. In a preferred embodiment, the number of lower optical microstructures 221 on the second molding plate 22 is 1 to 10, and the arrangement density is 4 to 16 per square millimeter.

[0035] The upper optical microstructure on the first molding plate 13 is described in detail. The first molding plate 13 also has an upper optical microstructure extending along the second direction Y. The cross-sectional profile of the upper optical microstructure is V-shaped, used for refracting and guiding incident light. The included angle β of the V-shaped cross-section is preferably in the range of 60 degrees to 10 degrees, more preferably 90 degrees. The depth h2 of the V-shaped cross-section is preferably in the range of 0.01 μm to 0.02 μm, matching the height of the lower optical microstructure 221.

[0036] At least two of the upper optical microstructures are arranged along the first direction X to form an upper optical microstructure array. The upper optical microstructures cooperate with the lower optical microstructure 221 to fully disperse light and achieve bidirectional optical modulation. The spacing L3 of the upper optical microstructures in the second direction Y is in the range of 50 μm to μm, and the spacing L4 in the first direction X is in the range of 50 μm to μm.

[0037] In a preferred embodiment, the number of upper optical microstructures on the first molding plate 13 is 1 to 10, which is equal to or an integer multiple of the number of lower optical microstructures 221 on the second molding plate 22. The positional correspondence between the upper and lower optical microstructures 221 can be optimized based on optical simulation results to achieve optimal light uniformity and light extraction efficiency.

[0038] Both the first heating base 12 and the second heating base 21 include a metal base 30 and several heating rods 31. The metal base 30 is made of a metal material with excellent thermal conductivity, such as copper or aluminum. The heat generated by the heating rods 31 is evenly transferred to the forming channel between the upper and lower stamping mechanisms via the metal base 30, the first forming plate 13, and the second forming plate 22. Due to the presence of the metal base 30 with excellent thermal conductivity, local heat accumulation is effectively avoided, and the forming of the light guide plate is improved.

[0039] The heating rods 31 are arranged in parallel inside the metal base 30. There are multiple heating rods 31, and a preset distance is maintained between adjacent heating rods 31. The preset distance is preferably in the range of 15mm to 25mm to ensure uniform distribution of heating temperature. The heating rods 31 can be resistance heating wires or PT heating elements, preferably PT ceramic heating elements, which have self-temperature control characteristics and higher safety.

[0040] In a preferred embodiment, the first heating seat 12 and the second heating seat 21 are each provided with 4 to 8 heating rods 31, and the heating rods 31 extend along a first direction.

[0041] The first fixed seat 11 and the second fixed seat 20 also include a top support mechanism disposed opposite to each other. The top support mechanism includes a movable top rod 40, a limiting sleeve 42, and a drive unit.

[0042] The push rod 40 is disposed within the limiting sleeve 42 and can slide up and down within the limiting sleeve. The push rod is made of high-strength steel and has a hard chrome-plated surface, achieving a hardness of HR55 to 60 and excellent wear resistance. The diameter of the push rod is preferably in the range of 5mm to 15mm.

[0043] The driving unit is located at the bottom of the limiting sleeve and is driven by the top rod. It can be driven by electromagnetic force or by a spring reset mechanism. The driving stroke of the driving unit is preferably in the range of 2mm to 10mm, and can be adjusted according to the thickness of the light guide plate.

[0044] like Figure 1 and Figure 2 As shown, the end of the push rod is provided with a curved contact portion 41, which is spherical. The contact portion 41 makes surface contact with the light guide plate material, ensuring accurate positioning and uniform force distribution of the light guide plate during the stamping process. The top support mechanism is used to assist in demolding after stamping or to support the light guide plate material in standby mode. When the mold opens, the light guide plate material adheres to the second forming plate 22, and the lower top support mechanism rises to lift the product. Before the mold closes, the upper support mechanism descends to press the material onto the forming plate, and the upper mold then presses down to prevent the material from being scratched by friction.

[0045] The first forming plate 13 and the second forming plate 22 can be made of nickel or ceramic. The nickel forming plate is manufactured using an electroforming nickel process, with a surface roughness R of 0.1μm to 0.2μm, high forming precision, good wear resistance, and long service life. The ceramic forming plate is preferably made of alumina ceramic or silicon nitride ceramic, which has advantages such as high temperature resistance, wear resistance, and good chemical stability, and can withstand higher stamping temperatures and pressures.

[0046] In a preferred embodiment, when a nickel-based forming plate is used, the plate thickness is preferably 3 mm to 10 mm, and the hardness reaches HV400 to 500. When a ceramic-based forming plate is used, the plate thickness is preferably 2 mm to 8 mm, and the bending strength reaches MPa or higher.

[0047] Both the upper stamping mechanism and the lower stamping mechanism include a high-temperature resistant film 50, which is respectively disposed between the first heating seat 12 and the first forming plate 13 and between the second heating seat 21 and the second forming plate 22.

[0048] In some embodiments, the high-temperature resistant film 50 is made of polyimide film or polytetrafluoroethylene film. Polyimide film has a temperature resistance range of -269°C to 400°C and a tensile strength greater than MPa, making it a preferred material for the high-temperature resistant film 50. It is used to protect the first molding plate 13 and the second molding plate 22, ensuring temperature transfer while preventing excessive heat transfer that could damage the molding plates.

[0049] Based on the manufacturing equipment described in any of the above embodiments, this embodiment provides a detailed description of the manufactured light guide plate product.

[0050] like Figure 4 As shown, the manufactured light guide plate includes a light incident portion and a light guiding portion. The thickness of the light incident portion is a preset first thickness value, preferably 0.3 mm, to retain sufficient thickness for light transmission and improve light utilization. The thickness of the light guiding portion is a preset second thickness value, preferably 0.2 mm, and the thickness is reduced by 33.3% through an imprinting process.

[0051] The first thickness value is greater than the second thickness value, forming a thickness difference structure. A transition structure 330 is provided between the light-incident part and the light-guide part. The transition structure 330 is sloped, with the slope length preferably in the range of 0.5mm to 2mm and the slope angle preferably in the range of 30 degrees to 60 degrees. The transition structure 330 is used to achieve a gradual thickness change between the light-incident part and the light-guide part, effectively preventing pressure concentration during imprinting and avoiding stacking wrinkles in the equipment roll material, which could lead to damage to the optical microstructure.

[0052] In use, the light-incident part of the light guide plate is set to correspond with the LED light source or MiniLED light source. The light enters from the light-incident part, is guided by the transition structure into the light guide part, and is optically modulated by the lower optical microstructure 221 on the second molding plate 22 and the upper optical microstructure on the first molding plate 13 to achieve uniform light distribution.

[0053] In one specific application, multiple LED light sources are arranged along the length of the light guide plate, with multiple light-incident sections corresponding to each light-incident section. The width of each light-incident section is preferably 2mm to 5mm, and the spacing between adjacent light-incident sections is preferably 10mm to 30mm. The total length of the light guide plate is determined according to the actual application scenario and can be in the range of 50mm to 500mm.

[0054] The following is a specific embodiment of this application: A light guide plate manufacturing equipment based on stamping process, comprising: The upper stamping mechanism includes a pressure assembly 10 for outputting stamping force. A first fixing seat 11, a first heating seat 12, and a first forming plate 13 are sequentially fixed on the lower side of the pressure assembly 10. A forming groove 131 is provided on the first forming plate 13, and the forming groove 131 extends along a first direction. The lower stamping mechanism includes a second fixed base 20, a second heating base 21, and a second forming plate 22 connected sequentially from bottom to top; the central axes of the upper stamping mechanism and the lower stamping mechanism coincide, and the pressurizing component 10 drives the upper stamping mechanism to move up and down synchronously. The second molding plate 22 is provided with a plurality of lower optical microstructures 221 arranged along a second direction, which is perpendicular to the first direction.

[0055] In one possible implementation, the forming groove 131 includes a bottom surface, a light-incident surface and a stepped surface disposed opposite to each other on both sides of the bottom surface, the light-incident surface being parallel to the vertical direction, and the stepped surface being inclined and extending at its lower end toward the side away from the light-incident surface.

[0056] In one possible implementation, the lower optical microstructure 221 is configured as a cone protruding from the second molding plate 22, and the bottom area of ​​the lower optical microstructure 221 decreases linearly along the vertical direction.

[0057] In one possible implementation, the height of the optical microstructure is 0.01 μm to 0.02 μm.

[0058] In one possible implementation, the first molding plate 13 is further provided with a lower optical microstructure 221 extending along a second direction, the cross-sectional profile of the lower optical microstructure 221 being V-shaped.

[0059] In one possible implementation, at least two of the lower optical microstructures 221 are included, the lower optical microstructures 221 being arranged along the first direction.

[0060] In one possible implementation, both the first heating base 12 and the second heating base 21 include a metal base 30 and several heating rods 31, which are arranged in parallel inside the metal base 30.

[0061] In one possible implementation, the first fixed seat 11 and the second fixed seat 20 further include a top support mechanism disposed opposite to each other. The top support mechanism includes a movable top rod, a limiting sleeve and a driving unit. The top rod is disposed in the limiting sleeve and the driving unit is disposed at the bottom of the limiting sleeve and is drivingly connected to the top rod. The end of the top rod is provided with a contact part 41 with an arc surface structure.

[0062] In one possible implementation, the first molding plate 13 and the second molding plate 22 are made of nickel or ceramic.

[0063] In one possible implementation, both the upper stamping mechanism and the lower stamping mechanism include a high-temperature resistant film 50, which is respectively disposed between the first heating seat 12 and the first forming plate 13, and between the second heating seat 21 and the second forming plate 22.

[0064] In this embodiment, optical microstructures are electroformed onto the surfaces of the first forming plate 13 and the second forming plate 22 made of nickel metal, replacing the traditional steel mold to support the microstructures. Combined with high-temperature isolation by the high-temperature resistant film 50 and precise control of pressure / heat of the copper mold, high-precision and continuous hot pressing molding of the ultra-thin flexible light guide plate is achieved.

[0065] Example 2 like Figure 5 As shown, based on the manufacturing equipment described in any of the above embodiments, this embodiment also proposes a method for manufacturing an ultrathin flexible light guide plate based on the manufacturing equipment described in any of the above embodiments, including the following steps: Using pure nickel plate as the base material, microstructures are formed on its surface through electroforming process of nickel aminosulfonate system, which serve as the first forming plate 13 and the second forming plate 22 of the equipment. At the same time, the first forming plate 13 is ground to form the light-advancing side step. The first forming plate 13 and the second forming plate 22 with the electroformed microstructure are assembled with the equipment, and the gap and alignment accuracy are adjusted to ensure that the imprinting conditions meet the standards. PET / flexible P and other roll substrates with a thickness of 0.2~0.3mm are installed on the unwinding mechanism. After passing through the guide roller and the correction sensor, the substrate is continuously conveyed by the substrate conveying mechanism at a fixed speed and placed on the lower stamping mechanism to the forming channel of the equipment. This ensures that the edge of the substrate is aligned with the edge of the forming channel to avoid wrinkles and stretching of the substrate during the stamping process. The heating rod 31 is activated to heat the first heating seat 12 and the second heating seat 21 on the upper and lower sides. The flexible substrate is preheated to the molding temperature through the heat conduction system of the equipment, in preparation for microstructure replication. The pneumatic pressurization device is activated, and the optical microstructures of the first molding plate 13 and the second urban and rural office surface are accurately copied onto the upper and lower surfaces of the flexible substrate through the pressing pair of the equipment, so as to achieve continuous imprinting.

[0066] The embossed semi-finished product is cooled and shaped, positioned by CCD, and cut to length and width. The cut semi-finished product is then adsorbed onto a polishing machine for mirror polishing. The polished product is then inspected under a jig to obtain a qualified finished product.

[0067] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A light guide plate manufacturing equipment based on stamping process, characterized in that, include: The upper stamping mechanism includes a pressure assembly for outputting stamping force. A first fixed base, a first heating base, and a first forming plate are sequentially connected to the lower side of the pressure assembly. A forming groove is provided on the first forming plate, and the forming groove extends along a first direction. The lower stamping mechanism includes a second fixed base, a second heating base, and a second forming plate that are fixedly connected from bottom to top; the central axes of the upper stamping mechanism and the lower stamping mechanism coincide, and the pressurizing component drives the upper stamping mechanism to move up and down synchronously; The second molding plate is provided with several lower optical microstructures arranged along a second direction, which is perpendicular to the first direction.

2. The light guide plate manufacturing equipment based on stamping process according to claim 1, characterized in that, The forming groove includes a bottom surface, a light-incident surface and a stepped surface disposed opposite to each other on both sides of the bottom surface. The light-incident surface is parallel to the vertical direction, and the stepped surface is inclined and its lower end extends toward the side away from the light-incident surface.

3. The light guide plate manufacturing equipment based on stamping process according to claim 2, characterized in that, The lower optical microstructure is configured as a cone protruding from the second molding plate, and the bottom area of ​​the lower optical microstructure decreases linearly along the vertical direction.

4. The light guide plate manufacturing equipment based on stamping process according to claim 2, characterized in that, The first molding plate is also provided with an upper optical microstructure extending along the second direction, and the cross-sectional profile of the upper optical microstructure is V-shaped.

5. The light guide plate manufacturing equipment based on stamping process according to claim 5, characterized in that, The second molding plate includes at least two of the lower optical microstructures, which are arranged along the first direction.

6. The light guide plate manufacturing equipment based on stamping process according to claim 1, characterized in that, Both the first heating base and the second heating base include a metal base and several heating rods, which are arranged in parallel inside the metal base.

7. The light guide plate manufacturing equipment based on stamping process according to claim 1, characterized in that, The first fixed seat and the second fixed seat also include a top support mechanism disposed opposite to each other. The top support mechanism includes a movable top rod, a limiting sleeve and a driving unit. The top rod is disposed in the limiting sleeve and the driving unit is disposed at the bottom of the limiting sleeve and is drivingly connected to the top rod. The end of the top rod is provided with a contact part with an arc surface structure.

8. The light guide plate manufacturing equipment based on stamping process according to claim 1, characterized in that, The first and second forming plates are made of nickel or ceramic.

9. The light guide plate manufacturing equipment based on stamping process according to claim 1, characterized in that, Both the upper stamping mechanism and the lower stamping mechanism include a high-temperature resistant film, which is respectively disposed between the first heating seat and the first forming plate, and between the second heating seat and the second forming plate.

10. A method for manufacturing a light guide plate, characterized in that, The method using the light guide plate manufacturing equipment based on stamping process as described in any one of claims 1-9 includes the following steps: Microstructures are processed on the surface of a nickel plate substrate by electroforming to obtain a first molding plate and a second molding plate. A molding groove is processed on the first molding plate. The first and second forming plates are assembled onto the equipment with their relative positions, and the gap adjustment and alignment accuracy adjustment are completed to form a forming channel. After the flexible PC roll is released by the unwinding mechanism, the flexible substrate is guided by the guide roller and the correction sensor, and then the flexible substrate is continuously conveyed to the forming channel at a preset speed. The first heating seat and the second heating seat are activated, and the heat is conducted to the first fixed seat and the second fixed seat, preheating the flexible PC roll substrate mounted on the second fixed seat to the molding temperature; When the pressurization component is activated, the forming channel closes, and the microstructure of the first forming plate and the second forming plate is accurately copied onto the upper and lower surfaces of the flexible substrate, and a semi-finished product is obtained by continuous imprinting. The embossed semi-finished product is cooled and shaped, and then cut to length and width using CCD positioning. The cut semi-finished product is then adsorbed onto a polishing machine for mirror polishing. The polished product is then inspected under a jig to obtain a qualified finished product.

Images