CN112621541A

CN112621541A - Light guide plate mold core, light guide plate mold core polishing device and light guide plate mold core polishing method

Info

Publication number: CN112621541A
Application number: CN202011508663.6A
Authority: CN
Inventors: 李海飞; 许世勇
Original assignee: Nano Precision Suzhou Co Ltd
Current assignee: Nano Precision Suzhou Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-04-09

Abstract

The invention provides a polishing device for a light guide plate mold core, which is used for polishing the light guide plate mold core. The light guide plate mold core polishing device comprises a polishing disc, a fixing jig and polishing liquid. The polishing disk comprises a rotating disk and a rotating shaft. The turntable is sleeved on the rotating shaft and is provided with a polishing surface. The rotary disc is used for rotating along the rotating shaft. The fixed fixture is configured opposite to the polishing surface. A gap is arranged between the fixed jig and the polishing surface, and the light guide plate mold core is arranged in the gap. The substrate is abutted against the fixed fixture, and the nickel layer is contacted with the polishing surface. The polishing liquid is provided to the polishing surface. The invention also provides a polishing method of the light guide plate mold core. The light guide plate mold core, the light guide plate mold core polishing device and the light guide plate mold core polishing method can improve the color difference phenomenon of the manufactured light guide plate by the polished light guide plate mold core and reduce the polishing processing time of the light guide plate mold core.

Description

Light guide plate mold core, light guide plate mold core polishing device and light guide plate mold core polishing method

Technical Field

The present invention relates to a mold, and more particularly, to a light guide plate mold, a light guide plate polishing apparatus used for the same, and a light guide plate polishing method.

Background

In recent years, as the performance of electroforming machines is increasingly refined, the development and mass production of large-size high-precision light guide plate molds are increasing. The light guide plate is used as a key element in the backlight module, and in order to ensure the quality of the light guide plate, a mold for the light guide plate, which can be mass-produced and has stable quality, must be developed.

At present, the material of the common light guide plate mold core is stainless steel, and the process of manufacturing the light guide plate mold core needs mirror polishing. The current method is to rotate and polish the surface of the light guide plate mold core to be polished downward on a machine. However, the light guide plate mold core has an excessive weight, which affects the rotation speed control of the polishing machine, and thus a dark image block is generated at the center of the light guide plate mold core, which further affects the color difference of the manufactured light guide plate.

In addition, since the rotational speed control of the polishing machine cannot be stabilized, the polishing process time is increased.

The background section is provided to aid in understanding the present invention, and thus the disclosure in the background section may include some prior art that does not constitute a part of the present invention as understood by those skilled in the art. Furthermore, the disclosure in the "background" section is not intended to represent a representation of the disclosure or of the problems one or more embodiments of the present invention would solve, nor is it intended to be interpreted as being known or appreciated by those skilled in the art prior to the filing date of the present application.

Disclosure of Invention

The invention provides a light guide plate mold core, which can improve the color difference phenomenon of a light guide plate manufactured by the mold core and reduce the polishing processing time.

The invention provides a polishing device for a light guide plate mold core, which can improve the color difference phenomenon of a manufactured light guide plate by the polished light guide plate mold core and reduce the polishing processing time of the light guide plate mold core.

The invention provides a polishing method of a light guide plate mold core, which can improve the color difference phenomenon of a manufactured light guide plate by the polished light guide plate mold core and reduce the polishing processing time of the light guide plate mold core.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a light guide plate mold insert including a substrate and a nickel layer, wherein the nickel layer is disposed on the substrate.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a polishing apparatus for a mold insert of a light guide plate, which is used for polishing the mold insert of the light guide plate. The light guide plate mold core polishing device comprises a polishing disc, a fixing jig and polishing liquid. The polishing disk comprises a rotating disk and a rotating shaft. The turntable is sleeved on the rotating shaft and is provided with a polishing surface. The rotary disc is used for rotating along the rotating shaft. The fixed fixture is configured opposite to the polishing surface. A gap is arranged between the fixed jig and the polishing surface, and the light guide plate mold core is arranged in the gap. The substrate is abutted against the fixed fixture, and the nickel layer is contacted with the polishing surface. The polishing liquid is provided to the polishing surface.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a method for polishing a mold insert of a light guide plate, which is used for the above polishing apparatus and the above mold insert of a light guide plate. The polishing method of the light guide plate mold core comprises the steps of arranging a nickel layer on a substrate to form the light guide plate mold core; arranging the light guide plate mold core in a gap between the fixed jig and the polishing surface, abutting the substrate against the fixed jig, and contacting the nickel layer with the polishing surface; and rotating the turntable to make the turntable slide relative to the nickel layer so as to polish the nickel layer of the light guide plate mold core.

In the method for polishing the light guide plate mold core according to the embodiment of the invention, the light guide plate mold core comprises a substrate and a nickel layer, the nickel layer is arranged on the substrate, and when the light guide plate mold core is polished by using the light guide plate mold core polishing device, the nickel layer is contacted with a polishing surface, so that the turntable of the polishing disc slides relative to the nickel layer to polish the nickel layer of the light guide plate mold core. Because the nickel has the metal characteristic of softer hardness and is easy to process, the polishing time of the light guide plate mold core can be reduced in the polishing process. In addition, compared with the mode of polishing the substrate of the light guide plate mold core, the finished product of the light guide plate mold core obtained by polishing the nickel layer has a relatively flat mold core surface, and the color difference phenomenon of the manufactured light guide plate can be further improved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic perspective view of a light guide plate cavity polishing apparatus and a light guide plate cavity according to an embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of a light guide plate cavity polishing apparatus and a light guide plate cavity according to an embodiment of the invention.

Fig. 3 is a schematic flow chart illustrating a method for polishing a light guide plate cavity of a light guide plate cavity according to an embodiment of the invention.

Fig. 4 is a schematic diagram of a finished product of a polished light guide plate mold insert according to an embodiment of the invention.

List of reference numerals

1: polishing device for light guide plate mold core

2. 2a light guide plate mold core

21: substrate

22. 22a nickel layer

100 polishing disk

110: rotating disk

120: rotating shaft

200 fixing jig

210 fixing column

220 fixed disk

300 polishing solution

400 finishing jig

410 limiting column

420 finishing ring

G is clearance

R1, R2, R3 rotation direction

S101, S102, S103, S104

T is the thickness.

Detailed Description

The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of a preferred embodiment when read in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic perspective view of a light guide plate cavity polishing apparatus and a light guide plate cavity according to an embodiment of the invention. Fig. 2 is a schematic cross-sectional view of a light guide plate cavity polishing apparatus and a light guide plate cavity according to an embodiment of the invention. Referring to fig. 1 and 2, the light guide plate mold polishing apparatus 1 of the present embodiment is used for polishing a light guide plate mold 2, but may be applied to other types of molds, wherein the light guide plate mold 2 includes a substrate 21 and a nickel layer 22, and the nickel layer 22 is disposed on the substrate 21. The material of the substrate 21 is, for example, stainless steel, but is not limited thereto. The light guide plate mold insert 2 may be disposed in the light guide plate mold after polishing, and the light guide plate is manufactured through the light guide plate molding machine. The light guide plate cavity polishing apparatus 1 of the present embodiment will be described in detail below.

In the present embodiment, the light guide plate cavity polishing apparatus 1 includes a polishing plate 100, a fixing fixture 200 and a polishing liquid 300. The polishing disc 100 includes a turntable 110 and a spindle 120. The turntable 110 is sleeved on the rotating shaft 120 and has a polishing surface 111. The turntable 110 is adapted to rotate along a rotation axis 120. In the present embodiment, the material of the turntable 110 is, for example, a mixture of copper and resin, but is not limited thereto. The fixing jig 200 is disposed opposite to the polishing surface 111. A gap G is formed between the fixing fixture 200 and the polishing surface 111, and the light guide plate mold core 2 is disposed in the gap G (as shown in fig. 2). Specifically, the fixing fixture 200 fixes the light guide plate mold core 2 on the turntable 110, the substrate 21 abuts against the fixing fixture 200, and the nickel layer 22 contacts the polishing surface 111. For example, but not limited to, providing the polishing fluid 300 to the polishing surface while the turntable 110 is rotating. In another embodiment, the polishing liquid 300 may be optionally not provided. The amount of the polishing solution 300 supplied may also be adjusted according to the polishing material and the polishing requirements.

Specifically, the fixing fixture 200 includes, for example, but not limited to, a fixing post 210 and a fixing plate 220. The fixing plate 220 is sleeved on one end of the fixing post 210, the fixing plate 220 abuts against the substrate 21, and the fixing plate 220 is used for rotating along the fixing post 210. When the turntable 110 rotates, the fixing disc 220 may be fixed, and the nickel layer 22 contacts the polishing surface 111 for polishing by abutting against the substrate 21; alternatively, the fixing plate 220 may drive the light guide plate mold core 2 to rotate along the fixing post 210. In the present embodiment, the rotation direction R1 of the fixed disk 220 is, for example, the same as the rotation direction R2 of the turntable 110, but is not limited thereto. In another embodiment, the rotation direction R1 of the fixed disk 220 may be opposite to the rotation direction R2 of the turntable 110. The fixing posts 210 function to rotate the fixed platter 220 but restrict the movement of the fixed platter 220. In the light guide plate cavity polishing apparatus 1, one end of the rotating shaft 120 is, for example, fixed to other mechanisms not shown in the light guide plate cavity polishing apparatus 1, and the other end is connected to the turntable 110; one end of the fixing column 210 is fixed to another mechanism, not shown, in the light guide plate cavity polishing apparatus 1, for example, and the other end is connected to the fixing plate 220. Therefore, when the turntable 110 and the fixing disc 220 rotate respectively, the relative positions of the turntable and the fixing disc in the light guide plate cavity polishing apparatus 1 are not changed, so that the polishing process can achieve a better effect.

In addition, the orthographic projection of the fixed tray 220 on the turntable 110 covers the light guide plate mold core 2, for example, the area of the fixed tray 220 is larger than the area of the surface of the light guide plate mold core 2, which is abutted to the fixed tray 220, for example, as shown in fig. 1, the fixed tray 220 completely covers the light guide plate mold core 2. By the above design, the fixing plate 220 can more firmly fix the light guide plate mold core 2 on the turntable 110 when abutting against the substrate 21. The term "fixed on the turntable 110" means to prevent the light guide plate mold core 2 from moving on the turntable 110 and getting loose or slipping off, but does not mean that the light guide plate mold core 2 rotates with the rotation of the turntable 110, and the polishing surface 111 of the turntable 110 rotates to contact and rub the nickel layer 22 of the light guide plate mold core 2, so that the polishing effect can be achieved. However, the present invention is not limited to the relative area between the fixing plate 220 and the light guide plate cavity 2, as long as the fixing effect can be achieved.

The polishing liquid 300 includes, for example, oil and polishing particles (not shown) for supplying to the polishing surface 111 and polishing the nickel layer 22. The polishing solution 300 is used to polish the nickel layer 22 with small particles, so that the polished nickel layer 22 can further improve the surface brightness and uniformity. The polishing particles include various metal particles and metal oxide particles, and the type and size of the polishing particles can be selected according to the polishing requirements. The liquid oil helps to lubricate and uniformly distribute the polishing particles on the polishing surface 111.

The light guide plate mold core 2 of the present embodiment includes a substrate 21 and a nickel layer 22, wherein the nickel layer 22 is disposed on the substrate 21, and when the light guide plate mold core 2 is polished by using the light guide plate mold core polishing apparatus 1, the nickel layer 22 is contacted with the polishing surface 111, so that the turntable 110 of the polishing disc 100 rotates and slides relative to the nickel layer 22 to polish the nickel layer 22 of the light guide plate mold core 2. Because the nickel has a soft hardness due to its metallic characteristics and is easy to process, the polishing time of the light guide plate cavity 2 can be reduced during the polishing process. In addition, compared with the method of directly polishing the substrate 21 of the light guide plate mold core 2 without the nickel layer 22, the finished product of the light guide plate mold core 2 obtained by polishing the nickel layer 22 has a relatively flat mold core surface, and is not easy to generate shadow blocks, thereby improving the color difference phenomenon of the manufactured light guide plate.

In the embodiment, the light guide plate cavity polishing apparatus 1 further includes a trimming fixture 400, for example. The trimming fixture 400 includes, for example, a limiting post 410 and a trimming ring 420. The dressing ring 420 is sleeved on the limiting column 410 and contacts the polishing surface 111. The dressing ring 420 is adapted to rotate along the restraint post 410, but is not limited thereto. In another embodiment, the dressing ring 420 may be not rotated and only contacts the polishing surface 111. The dressing ring 420 of the present embodiment has a rotation direction R3, and may be the same as or opposite to the rotation direction R2 of the turntable 110. The material of the dressing ring 420 is, for example, but not limited to, ceramic. Specifically, the trimming jig 400 has a structure similar to, but not limited to, the fixing jig 200. One end of the limiting column 410 is fixed to other mechanisms, not shown, in the light guide plate cavity polishing apparatus 1, for example, and the other end is connected to the trimming ring 420. The dressing ring 420 has a disk-like structure, for example. Since the turntable 110 may cause unevenness of the polishing surface 111 during polishing the light guide plate cavity 2, the configuration of the trimming fixture 400 allows the trimming fixture 400 to continuously contact the polishing surface 111 when the turntable 110 rotates, so as to improve the surface flatness of the polishing surface 111 and further improve the polishing effect of the polishing disc 100.

Fig. 3 is a schematic flow chart illustrating a method for polishing a light guide plate cavity of a light guide plate cavity according to an embodiment of the invention. Referring to fig. 1 and 3, the light guide plate cavity polishing method of the light guide plate cavity 2 of the present embodiment is used in the light guide plate cavity polishing apparatus 1, and the light guide plate cavity polishing method is to perform finishing processing on the nickel layer 22 by the relative movement of the light guide plate cavity polishing apparatus 1 and the light guide plate cavity 2 under a certain pressure. The polishing method for the light guide plate mold core comprises the following steps: step S101 is performed: the nickel layer 22 is disposed on the substrate 21 to form the light guide plate mold core 2. Specifically, the nickel layer 22 is disposed by, for example, electroplating on the substrate 21, but is not limited thereto. Then, the light guide plate cavity 2 to be polished is placed in the light guide plate cavity polishing device 1, and the step S102 is performed: the light guide plate mold core 2 is disposed in the gap G between the fixing jig 200 and the polishing surface 111, the substrate 21 abuts against the fixing jig 200, and the nickel layer 22 contacts with the polishing surface 111. The fixing fixture 200 provides a certain pressure to the light guide plate mold core 2, so that the light guide plate mold core 2 can be stably fixed on the polishing surface 111, but the rotation of the turntable 110 is not affected.

Before starting polishing, for example, step S103 may be further included: the polishing liquid 300 is supplied onto the polishing surface 111, and the polishing liquid 300 is disposed between the nickel layer 22 and the polishing surface 111. According to the requirement, the polishing solution 300 can be continuously provided during the polishing process, and the polishing solution 300 can enable the polished nickel layer 22 to further improve the surface brightness and uniformity. In another embodiment, step S103 may not be performed.

Subsequently, step S104 is performed: the turntable 110 is rotated to slide the turntable 110 relative to the nickel layer 22, so as to polish the nickel layer 22 of the light guide plate mold core 2. In the present embodiment, in step S104, for example, the nickel layer 22 is polished until the surface is smooth, and the polishing of the light guide plate mold core 2 is completed. Because the nickel has a soft hardness due to its metallic characteristics and is easy to process, the polishing time of the light guide plate cavity 2 can be reduced during the polishing process. In addition, compared with the method of directly polishing the substrate 21 of the light guide plate mold core 2 without the nickel layer 22, the finished product of the light guide plate mold core 2 obtained by polishing the nickel layer 22 has a relatively flat mold core surface, and is not easy to generate shadow blocks, thereby improving the color difference phenomenon of the manufactured light guide plate. When the light guide plate cavity polishing apparatus 1 is used for polishing other types of molds, the polishing time, the rotation speed of the turntable 110, the supply of the polishing solution 300, and the like may be adjusted according to the desired surface flatness.

Fig. 4 is a schematic diagram of a finished product of a polished light guide plate mold insert according to an embodiment of the invention. Referring to fig. 4, in the polished light guide plate mold core 2a of the present embodiment, compared to the light guide plate mold core 2 to be polished, the thickness T of the nickel layer 22a of the light guide plate mold core 2a is smaller than the thickness of the nickel layer 22 of the light guide plate mold core 2 (not shown). Specifically, the thickness of the nickel layer 22 to be polished is 120 μm to 150 μm, and the thickness T of the nickel layer 22a after polishing is about 100 μm. In addition, the surface flatness and smoothness of the nickel layer 22a are also greater than those of the nickel layer 22. With the arrangement of the nickel layer 22a, when the light guide plate cavity 2a is worn for a long time, the light guide plate cavity 2a can be reused by removing the nickel layer 22a and retaining the substrate 21, reconfiguring the nickel layer 22 and performing the light guide plate cavity polishing method, or performing the light guide plate cavity polishing method on the light guide plate cavity 2a again in the light guide plate cavity polishing device 1 to polish the surface of the film layer worn out of the nickel layer 22, thereby reducing the production cost.

In summary, in the method for polishing the light guide plate mold insert according to the embodiment of the invention, the light guide plate mold insert includes the substrate and the nickel layer, the nickel layer is disposed on the substrate, and when the light guide plate mold insert is polished by the light guide plate mold insert polishing apparatus, the nickel layer is contacted with the polishing surface, so that the turntable of the polishing disk slides relative to the nickel layer to polish the nickel layer of the light guide plate mold insert. Because the nickel has the metal characteristic of softer hardness and is easy to process, the polishing time of the light guide plate mold core can be reduced in the polishing process. In addition, compared with the mode of polishing the substrate of the light guide plate mold core, the finished product of the light guide plate mold core obtained by polishing the nickel layer has a relatively flat mold core surface, and the color difference phenomenon of the manufactured light guide plate can be further improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and the description of the invention. Moreover, not all objects or advantages or features disclosed herein are necessarily achieved by any one embodiment or claim of the invention. Furthermore, the abstract and the title of the specification are provided only for assisting the retrieval of patent documents and are not intended to limit the scope of the present invention.

Claims

1. The light guide plate mold core polishing device is used for polishing a light guide plate mold core, the light guide plate mold core comprises a substrate and a nickel layer, the nickel layer is arranged on the substrate, the light guide plate mold core polishing device comprises a polishing disc, a fixing jig and polishing liquid, wherein the polishing disc, the fixing jig and the polishing liquid are arranged in the polishing disc, and the polishing disc is arranged on the substrate and used for polishing the light guide plate mold core

The polishing disc comprises a rotating disc and a rotating shaft, the rotating disc is sleeved on the rotating shaft and is provided with a polishing surface, and the rotating disc is used for rotating along the rotating shaft;

the fixed jig is arranged opposite to the polishing surface, a gap is formed between the fixed jig and the polishing surface, the light guide plate die core is arranged in the gap, the substrate abuts against the fixed jig, and the nickel layer is in contact with the polishing surface; and

the polishing liquid is used for being provided on the polishing surface.

2. The apparatus of claim 1, wherein the fixture comprises a fixing post and a fixing plate, the fixing plate is sleeved on the fixing post and abuts against the substrate, and the fixing plate is configured to rotate along the fixing post.

3. The apparatus of claim 2, wherein the rotation direction of the fixing plate is the same as the rotation direction of the turntable.

4. The apparatus of claim 2, wherein an orthographic projection of the fixed plate on the turntable covers the light guide plate cavity.

5. The apparatus of claim 1, further comprising a trimming fixture, wherein the trimming fixture comprises a positioning post and a trimming ring, the trimming ring is coupled to the positioning post and contacts the polishing surface, and the trimming ring is configured to rotate along the positioning post.

6. The polishing apparatus for a stamper of a light guide plate of claim 1, wherein the polishing solution comprises polishing particles for polishing the nickel layer.

7. The apparatus of claim 1, wherein the turntable is made of copper or resin.

8. The light guide plate mold insert is characterized by comprising a substrate and a nickel layer, wherein the nickel layer is arranged on the substrate.

9. The polishing method for the light guide plate mold core is characterized by being used for a polishing device for the light guide plate mold core, wherein the polishing device for the light guide plate mold core comprises a polishing disc, a fixing jig and polishing liquid, the polishing disc comprises a rotating disc and a rotating shaft, the rotating disc is sleeved on the rotating shaft and is provided with a polishing surface, and the rotating disc is used for rotating along the rotating shaft; the fixed jig is configured relative to the polishing surface, and a gap is formed between the fixed jig and the polishing surface; the polishing solution is provided on the polishing surface, and the polishing method of the light guide plate mold core comprises the following steps:

disposing the nickel layer on the substrate to form a light guide plate mold core;

arranging the light guide plate mold core in the gap between the fixed jig and the polishing surface, wherein the substrate is abutted against the fixed jig, and the nickel layer is contacted with the polishing surface; and

and rotating the turntable to enable the turntable to slide relative to the nickel layer so as to polish the nickel layer of the light guide plate mold core.

10. The method of claim 9, wherein disposing the nickel layer on the substrate comprises electroplating the nickel layer on the substrate.

11. The method as claimed in claim 9, wherein the polishing apparatus further comprises a trimming fixture, the trimming fixture comprises a positioning post and a trimming ring, the trimming ring is coupled to the positioning post and contacts the polishing surface, and the trimming ring is configured to rotate along the positioning post.

12. The method of claim 9, wherein polishing the nickel layer of the mold comprises providing the polishing solution to the polishing step

And on the smooth surface, the polishing solution is arranged between the nickel layer and the polishing surface.

13. The method of claim 9, wherein polishing the nickel layer of the light guide plate mold comprises polishing the nickel layer to a smooth surface.