阅读说明：本技术 补偿热压滚筒中间导光板网点压印不实的缓冲片和方法 (Buffer sheet and method for compensating impress of mesh points of middle light guide plate of hot-pressing roller ) 是由 黄清海 黄耀鹭 汤璐欣 于 2021-08-31 设计创作，主要内容包括：本发明涉及导光板网点热压领域,特别地涉及一种补偿热压滚筒中间导光板网点压印不实的缓冲片和方法。其中,方法包括步骤：S1,制作缓冲片,在缓冲片本体的朝向滚筒的内表面形成有墨层,墨层的厚度在沿滚筒长度方向上从中间向两边逐渐减小,且在沿滚筒长度方向上,墨层的宽度不小于导光板网版的宽度；S2,将缓冲片安装在热压机的与导光板网点面相背的滚筒的外表面上,然后对导光板进行热压印。本发明压印出来的大尺寸的导光板品质满足要求,光学均一性好,有效地改善了因滚筒刚性不足造成中间网点压印不实的问题,无需再更改滚筒,易于实现,操作简便,大大降低了加工成本。(The invention relates to the field of hot pressing of light guide plate mesh points, in particular to a buffer sheet and a method for compensating unrealistic impression of the mesh points of a light guide plate in the middle of a hot pressing roller. Wherein, the method comprises the following steps: s1, manufacturing a buffer sheet, wherein an ink layer is formed on the inner surface of the buffer sheet body facing the roller, the thickness of the ink layer is gradually reduced from the middle to two sides along the length direction of the roller, and the width of the ink layer is not less than the width of the light guide plate screen printing plate along the length direction of the roller; and S2, mounting the buffer sheet on the outer surface of a roller of the hot press, which is opposite to the mesh point surface of the light guide plate, and then carrying out hot stamping on the light guide plate. The large-size light guide plate embossed by the invention meets the requirements on quality, has good optical uniformity, effectively solves the problem of unrealistic intermediate mesh point embossing caused by insufficient rigidity of the roller, does not need to change the roller, is easy to realize, is simple and convenient to operate, and greatly reduces the processing cost.)

1. The utility model provides a buffer block that hot pressing light guide plate dot impression is not real in the middle of compensation cylinder for the parcel is on the cylinder surface that the hot press carried on the back mutually with light guide plate dot face, its characterized in that: including the buffer chip body and set up the china ink layer at the internal surface of the orientation cylinder of buffer chip body, the thickness on china ink layer reduces to both sides from the centre along cylinder length direction on gradually, and along cylinder length direction, the width on china ink layer is not less than the width of light guide plate half tone.

2. The cushioning sheet according to claim 1, wherein the cushioning sheet comprises: the thickness of the middle of the ink layer is 0.1-0.3mm greater than the thickness of the two sides of the ink layer.

3. The cushioning sheet according to claim 2, wherein the cushioning sheet comprises: the ink layer is formed by adopting an ink jet printer for jet printing.

4. The cushioning sheet according to claim 1, wherein the cushioning sheet comprises: the buffer piece body is made of PET materials.

5. A method for compensating the impress of mesh points of a hot-pressed light guide plate in the middle of a roller is characterized by comprising the following steps:

s1, manufacturing a buffer sheet, wherein an ink layer is formed on the inner surface of the buffer sheet body facing the roller, the thickness of the ink layer is gradually reduced from the middle to two sides along the length direction of the roller, and the width of the ink layer is not less than the width of the light guide plate screen printing plate along the length direction of the roller;

and S2, mounting the buffer sheet on the outer surface of a roller of the hot press, which is opposite to the mesh point surface of the light guide plate, and then carrying out hot stamping on the light guide plate.

6. The method for compensating the screen dot impress of the hot-pressed light guide plate between rollers according to claim 5, wherein: in step S1, an ink layer is jet printed using an inkjet printer.

7. The method for compensating the impress of the mesh points of the hot-pressed light guide plate in the middle of the roller according to claim 6, wherein the specific method for forming the ink layer by adopting the ink-jet printer comprises the following steps: the ink-jet pattern was drawn in coreldpar software using a black gradient color, dark in the middle and light on both sides, and then introduced into an ink-jet printer which jet-prints the inner surface of the cushion sheet body according to the ink-jet pattern.

8. The method according to claim 7, wherein the method comprises the following steps: the number of times of spray printing is 8-10.

9. The method for compensating the screen dot impress of the hot-pressed light guide plate between rollers according to claim 5, wherein: the thickness of the middle of the ink layer is 0.1-0.3mm greater than the thickness of the two sides of the ink layer.

10. The method for compensating the screen dot impress of the hot-pressed light guide plate between rollers according to claim 5, wherein: the buffer piece body is made of PET materials.

Technical Field

The invention belongs to the field of hot pressing of light guide plate mesh points, and particularly relates to a buffer sheet and a method for compensating unrealistic impression of the mesh points of a light guide plate in the middle of a hot pressing roller.

Background

With the arrival of the trend of consumption upgrading, the demand of users for high-end large-screen televisions is continuously upgraded, and the demand of high-end large-screen markets is vigorous. The large-size high-end screen needs to use a large-size light guide plate, therefore, the demand of a hot press for hot-pressing light guide plate mesh points is larger, the precision requirement of the large-size hot press on a roller is higher and higher, the demand is a large-size screen television, for example 85 inches, the length required by the roller of the hot press needs more than 2m, and the 85-inch light guide plate can be pressed.

Disclosure of Invention

The invention aims to provide a buffer sheet and a method for compensating the impress of the mesh points of a middle light guide plate of a hot-pressing roller, which are used for solving the existing technical problems.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a buffer piece that hot pressing light guide plate site impression is not real in the middle of the compensation cylinder for the parcel is on the cylinder surface that the hot press carried on the back mutually with light guide plate site face of hot press, including the buffer piece body and set up the china ink layer at the internal surface of the orientation cylinder of buffer piece body, the thickness on china ink layer reduces to both sides from the centre on following cylinder length direction gradually, and on following cylinder length direction, the width on china ink layer is not less than the width of light guide plate half tone.

Furthermore, the thickness of the middle of the ink layer is 0.1-0.3mm larger than that of the two sides of the ink layer.

Furthermore, the ink layer is formed by jet printing of an ink jet printer.

Further, the buffer sheet body is made of PET materials.

The invention also provides a method for compensating the unrealistic impression of the mesh points of the hot-pressing light guide plate in the middle of the roller, which comprises the following steps:

s1, manufacturing a buffer sheet, wherein an ink layer is formed on the inner surface of the buffer sheet body facing the roller, the thickness of the ink layer is gradually reduced from the middle to two sides along the length direction of the roller, and the width of the ink layer is not less than the width of the light guide plate screen printing plate along the length direction of the roller;

and S2, mounting the buffer sheet on the outer surface of a roller of the hot press, which is opposite to the mesh point surface of the light guide plate, and then carrying out hot stamping on the light guide plate.

Further, in step S1, an ink layer is formed by inkjet printing using an inkjet printer.

Furthermore, the specific method for forming the ink layer by adopting the inkjet printer comprises the following steps: the ink-jet pattern was drawn in coreldpar software using a black gradient color, dark in the middle and light on both sides, and then introduced into an ink-jet printer which jet-prints the inner surface of the cushion sheet body according to the ink-jet pattern.

Furthermore, the number of times of spray printing is 8-10.

Furthermore, the thickness of the middle of the ink layer is 0.1-0.3mm larger than that of the two sides of the ink layer.

Further, the buffer sheet body is made of PET materials.

The invention has the beneficial technical effects that:

the large-size light guide plate embossed by the invention has the advantages that the quality meets the requirements, the optical uniformity is good, the problem of unrealistic intermediate mesh point embossing caused by insufficient rigidity of the roller is effectively solved, the roller does not need to be changed, the realization is easy, the operation is simple and convenient, and the processing cost is greatly reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a structural diagram of a buffer sheet according to an embodiment of the present invention;

FIG. 2 is a block diagram of another perspective view of a buffer sheet according to an embodiment of the invention;

FIG. 3 is a flow chart of a method of an embodiment of the present invention;

FIG. 4 is a schematic view of an inkjet pattern according to an embodiment of the present invention.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 and 2, a buffer sheet for compensating the impress of dots of a hot-pressed light guide plate in the middle of a roller, which is used for wrapping the outer surface of the roller of a hot press, which is opposite to the dot surface of the light guide plate, comprises a buffer sheet body 1 and an ink layer 2 arranged on the inner surface 11 of the buffer sheet body 1 facing the roller, wherein the thickness of the ink layer 2 is gradually reduced from the middle to two sides along the length direction of the roller (the X direction of fig. 1 and 2), so as to form smooth transition, and along the length direction of the roller, the width of the ink layer 2 is not less than the width of a screen of the light guide plate, that is, along the length direction of the roller, the ink layer 2 covers the screen, so as to improve the quality of the light guide plate after hot pressing.

The hot press comprises two rollers, wherein a hot-pressing screen plate is arranged on the outer surface of one roller, and a buffer sheet is arranged on the outer surface of the other roller.

Preferably, in this embodiment, the middle thickness d2 of the ink layer 2 is 0.1-0.3mm larger than the two sides of the ink layer 2, which is more effective to improve the problem of poor middle dot embossing caused by insufficient roller rigidity and improve the quality of the light guide plate, but not limited thereto, in some embodiments, the difference between the middle thickness d2 of the ink layer 2 and the two sides of the ink layer 2 may be selected according to actual needs, which can be easily implemented by those skilled in the art and will not be described in detail.

In this embodiment, the thickness of the two sides of the ink layer 2 is close to 0mm, so the middle thickness d2 of the ink layer 2 is 0.1-0.3mm, the overall smoothness is better, and the implementation is easy, but not limited to this, and in some embodiments, the thickness of the two sides of the ink layer 2 may be larger than 0 mm.

Preferably, in this embodiment, the ink layer 2 is formed by inkjet printing with an inkjet printer, which is easy to implement and low in cost, but not limited thereto.

In this embodiment, the buffer sheet body 1 is made of PET (polyethylene terephthalate), and can share the material with the reflective sheet of the light guide plate, without adding other materials, so that the buffer sheet body 1 is easy to produce, manage and manufacture, and has low cost.

The inner surface 11 and the outer surface of the cushion sheet body 1 are both planar structures, and the thickness d1 of the cushion sheet body 1 is 0.25mm, but not limited thereto, and in some embodiments, the thickness d1 of the cushion sheet body 1 may be greater than or less than 0.25 mm.

As shown in fig. 3, the present invention further provides a method for compensating the impress of the mesh points of the hot-pressed light guide plate between the rollers, comprising the steps of:

s1, a buffer sheet is manufactured, an ink layer 2 is formed on the inner surface 11 of the buffer sheet body 1 facing the roller, as shown in fig. 1 and 2, the thickness of the ink layer 2 is gradually reduced from the middle to the two sides along the length direction of the roller, and the width of the ink layer 2 is not less than the width of the light guide plate screen printing plate along the length direction of the roller.

In this embodiment, the size of the buffer sheet body 1 is 1280mm 1760mm 0.25mm, the length of the roller is 2 meters, the size of the light guide plate of the lamp to be hot-pressed is 1560mm 480mm 2.0mm, light enters from both sides of the light guide plate of the lamp, the density of the middle dots is higher, and the middle position of the stamping process is not solid, but not limited thereto.

In this embodiment, the buffer sheet body 1 is made of PET material, and can share material with the reflective sheet of the light guide plate, without adding other materials, so that the production management and the manufacturing are easy, the cost is low, but not limited thereto, and in some embodiments, the buffer sheet body 1 may also be made of other existing buffer materials.

Preferably, in this embodiment, the middle thickness d2 of the ink layer 2 is 0.1-0.3mm larger than the two sides of the ink layer 2, which is more effective to improve the problem of poor middle dot embossing caused by insufficient roller rigidity and improve the quality of the light guide plate, but not limited thereto, in some embodiments, the difference between the middle thickness d2 of the ink layer 2 and the two sides of the ink layer 2 may be selected according to actual needs, which can be easily implemented by those skilled in the art and will not be described in detail.

In this embodiment, the thickness of the two sides of the ink layer 2 is close to 0mm, so the middle thickness d2 of the ink layer 2 is 0.1-0.3mm, the overall smoothness is better, and the implementation is easy, but not limited to this, and in some embodiments, the thickness of the two sides of the ink layer 2 may be larger than 0 mm.

Preferably, in this embodiment, the ink layer 2 is formed by inkjet printing with an inkjet printer, which is easy to implement and low in cost, but not limited thereto.

In this embodiment, the ink jet printer is a UV ink jet printer, and the stroke is 1800mm by 1300mm, but not limited thereto. The specific spray printing method comprises the following steps:

s11, making an inkjet pattern, drawing the inkjet pattern in coreldpar software, using black gradient color with dark middle and light sides as shown in fig. 4, and deriving the PDF format for input into a UV inkjet printer. Black is used for lower cost, but is not limited thereto, and in some embodiments, other colors may be used. The ink jet pattern is a rectangle of 1600mm 520mm, and the ink jet pattern is made large, so that the position alignment is convenient during stamping.

S12, placing the buffer sheet body 1 on a suction platform of the UV ink-jet printer, adsorbing and fixing, testing the plate head distance of the light guide plate screen, and enabling the ink-jet pattern to be consistent with or slightly smaller than the plate head distance of the screen pattern, wherein the ink-jet pattern can be larger than the pattern of the screen, so that the position of the ink layer 2 is convenient to be consistent with the pattern of the light guide plate screen. The ink jet printer starts the jet printing according to the ink jet pattern, preferably 8-10 times, so that the middle thickness d2 of the ink layer 2 is 0.1-0.3mm greater than the thickness of both sides of the ink layer 2.

And S2, mounting the buffer sheet on the outer surface of a roller of the hot press, which is opposite to the mesh point surface of the light guide plate, and then carrying out hot stamping on the light guide plate.

Specifically, the buffer chip wraps up on the surface of cylinder, and china ink layer 2 is towards the cylinder, and the surface of buffer chip body 1 is the smooth surface, and the impression quality of light guide plate has been guaranteed to the light guide plate impression face of can directly not following china ink layer 2 contact.

In this embodiment, still be equipped with two-layer PET buffer chip between cylinder and the buffer chip, two-layer PET buffer chip is 0.25mm, further promotes the compensation effect, but is not limited to this.

The mounting and fixing of the buffer sheet and the hot stamping process of the light guide plate can refer to the existing hot press, which can be easily realized by a person skilled in the art and is not described in detail.

According to the invention, the ink layer 2 with the thickness gradually reduced from the middle to two sides is arranged on the buffer sheet body 1, so that the problem of unrealistic middle mesh point imprinting caused by insufficient roller rigidity of the hot press is effectively solved, the imprinted large-size light guide plate meets the requirements in quality, the optical uniformity is good, the roller does not need to be changed, the structure is simple, the realization is easy, the operation is simple and convenient, and the processing cost is greatly reduced.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.