CN110587145B - Manufacturing method of large-size hot-pressing screen printing plate - Google Patents
Manufacturing method of large-size hot-pressing screen printing plate Download PDFInfo
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- CN110587145B CN110587145B CN201910887565.9A CN201910887565A CN110587145B CN 110587145 B CN110587145 B CN 110587145B CN 201910887565 A CN201910887565 A CN 201910887565A CN 110587145 B CN110587145 B CN 110587145B
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- 238000007731 hot pressing Methods 0.000 title claims abstract description 39
- 238000007650 screen-printing Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000007639 printing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 19
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
The invention relates to a method for manufacturing a large-size hot-pressing screen printing plate, which manufactures the large-size hot-pressing screen printing plate on a laser screen printing plate dotting machine with limited stroke in a mesh point splicing mode, and the taste of a large-size light guide plate embossed by the large-size hot-pressing screen printing plate manufactured by the manufacturing method meets the requirement, the cutting mark on the light guide plate is not obvious, the optical uniformity is good, so that the problem that the existing laser screen printing plate dotting machine is limited by the stroke and cannot directly manufacture the large-size hot-pressing screen printing plate is solved.
Description
Technical Field
The invention relates to the technical field of light guide plates, in particular to a method for manufacturing a large-size hot-pressing screen printing plate.
Background
With the continuous upgrade of the consumer demand for high-end large-screen televisions, the high-end large-screen market demand is vigorous. At present, three main processes of a large-size light guide plate applied to the field of liquid crystal display are provided, wherein the first process is a process of printing the light guide plate, the second process is a process of laser light guide plate, and the third process is a process of hot-pressing the light guide plate. In light guide plate enterprises at home and abroad, continuous and vigorous research and development is invested, and a second generation light guide plate process (namely a laser light guide plate process) is gradually replaced by a third generation light guide plate process (namely a hot-pressing light guide plate process).
When the large-size hot-pressing light guide plate is manufactured, the mesh points are required to be formed on the light guide plate by using the large-size hot-pressing screen printing plate, the stroke of the existing laser screen printing plate dotting machine is limited, and the large-size hot-pressing screen printing plate cannot be directly manufactured by using the existing laser screen printing plate dotting machine, so that the production of the large-size hot-pressing light guide plate is limited.
Disclosure of Invention
The invention aims to provide a method for manufacturing a large-size hot-pressing screen printing plate, which solves the problem that the conventional laser screen printing plate dotting machine is limited by stroke and cannot directly manufacture the large-size hot-pressing screen printing plate.
The specific scheme is as follows:
a manufacturing method of a large-size hot-pressing screen printing plate comprises the following steps:
s1, providing a steel plate, positioning and fixing the steel plate on a working platform of the laser screen dotting machine, planning a plurality of dot areas which are sequentially connected end to end along the same direction on the steel plate according to output dots, wherein each dot area corresponds to one part of the output dots, and defining that a laser head of the laser screen dotting machine moves in the left-right direction and the working platform moves in the front-back direction;
s2, selecting one of the dot areas as a starting area, printing corresponding dots in the starting area, taking the starting area as a reference area of an adjacent dot area, printing first trapezoid dots on the left side and the right side of the joint of the starting area and the adjacent dot area, wherein each first trapezoid dot is an isosceles trapezoid formed by a plurality of circular dots, the distance between each circular dot and the adjacent circular dots in the left-right direction and the front-back direction is the same, and the long side of the isosceles trapezoid faces one side of the adjacent dot area;
s3, printing a second trapezoidal dot which is arranged in a mirror image mode with a trapezoidal dot on the same side on one of the left side and the right side of a first dot area adjacent to the initial area, compensating the position of the laser head in the left-right direction according to the position deviation of the first trapezoidal dot and the second trapezoidal dot, and compensating the position of the working platform in the front-back direction;
s4, after the step S3 is completed, printing a second trapezoidal dot which is arranged in a mirror image with the trapezoidal dot on the same side on the other side of the left side and the right side of the first dot area adjacent to the initial area, and compensating the dot in the first dot area in a torsion angle mode according to the position deviation of the first trapezoidal dot and the second trapezoidal dot;
s5, printing a corresponding screen dot in the first screen dot region;
and S6, repeating the steps S3, S4 and S5 until all the dot regions are printed with corresponding dots by taking the first dot region as a reference region.
Furthermore, the number of the plurality of dot areas planned on the steel plate is not less than three, and the starting area is positioned in the middle of all the dot areas.
Furthermore, the first trapezoid screen dots are composed of a plurality of rows of circular screen dots, and the number of the circular screen dots in the next row is two more than that of the circular screen dots in the previous row.
Compared with the prior art, the manufacturing method of the large-size hot-pressing screen printing plate has the following advantages:
the manufacturing method provided by the invention realizes the manufacturing of the large-size hot-pressing screen printing plate by adopting the laser screen printing plate dotting machine with limited stroke, the trapezoidal mesh points can successively complete the adjustment of the steel plate on the front and back, the left and right and the torsion angle, the realization of the mesh point splicing on the large-size hot-pressing screen printing plate is ensured, the taste of the large-size light guide plate stamped by the large-size hot-pressing screen printing plate is required, the division mark on the light guide plate is not obvious, the optical uniformity is good, the operation is simple and convenient in the production process of the large-size hot-pressing screen printing plate, the laser screen printing plate dotting machine with larger stroke is not required.
Drawings
Fig. 1 shows a schematic diagram of a laser screen dotting machine.
Fig. 2 shows a schematic view of a steel plate.
Figure 3 shows a schematic view of printing dots in a second area of a steel plate.
Fig. 4 shows a schematic diagram of a trapezoidal dot.
Fig. 5 shows a schematic diagram of a dot stitching within a first region and a second region.
Fig. 6 shows a schematic diagram of trapezoidal dot alignment when dots in the first area and the second area are spliced.
Fig. 7 shows a graph of the positional relationship between two trapezoidal dots before adjustment.
Fig. 8 shows a graph of the position relationship between two trapezoidal dots after adjustment.
Fig. 9 shows a schematic diagram after the mesh points on the steel plate are spliced.
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.
The embodiment provides a method for manufacturing a large-size hot-pressing screen printing plate, which is used for manufacturing the large-size hot-pressing screen printing plate by using an existing laser screen printing plate dotting machine so as to provide a foundation for subsequently manufacturing a large-size hot-pressing light guide plate.
Referring to fig. 1, the laser head 10 of the laser screen dotting machine (RXP-DOT 32FL8001, a product of honor precision laser technology ltd) in the present embodiment can only move in the left and right directions with the stroke of the laser head 10 in the left and right directions of 860mm, the work table 11 of the laser screen dotting machine can move in the front and rear directions with the stroke of the work table 11 in the front and rear directions of 480mm, and therefore, the laser screen dotting machine can only manufacture a hot-pressing screen of 860mm × 480mm by using the existing screen manufacturing technology, and can manufacture a light guide plate having a size of about 39 inches.
Referring to fig. 1 to 4, the present embodiment is described by taking the laser screen dotting machine 1 as an example to manufacture a 65-inch light guide plate, but the present invention is not limited thereto, and a hot-pressing screen with other sizes can be realized by using the method for manufacturing a large-size hot-pressing screen provided by the present embodiment. Since the length of the hot-pressing screen plate of 65 inches is 1428mm and the width thereof is 810mm, the hot-pressing screen plate of 65 inches is manufactured by using a rectangular steel plate 2 having a length of 2170mm by 850mm and a thickness of 0.5mm in the present embodiment. The specific manufacturing steps are as follows:
and S1, placing a steel plate. As shown in figures 1 and 2, the screw hole positions of phi 5 on two sides of the steel plate 2 in the length direction are aligned with the hole positions on the working platform 11, and the suction air absorbed on the laser screen printing plate dotting machine 1 is locked and unlocked, so that the steel plate can not be translated for the next time.
And S2, printing the first screen point. As shown in fig. 2 and 3, the 65 inch hot-pressed screen had a length of 1428mm and a width of 810 mm. Is limited by the movement stroke of the laser screen printing dot machine 1, and cannot complete the printing of the whole hot-pressing screen printing plate at one time. Therefore, the dots are output through the Gtools optical software, and are divided into three segments, each segment corresponds to three segments of areas defined on the steel plate 2 along the length direction, and is defined as a first area 20, a second area 21 and a third area 22 along the length direction in sequence, and the size of each segment is 476mm × 810 mm. During manufacturing, the screen dots are respectively printed in each area so as to splice into the hot-pressing screen printing plate with large size. It should be clear here that the size of each area should be within the range of the movement stroke of the laser screen dotting machine 1.
Although the steel plate 2 is fixedly aligned by screws, the alignment is only primary alignment, and the accuracy cannot meet the requirement of dot printing, so that secondary alignment needs to be performed manually, and the steel plate 2 is translated manually during operation, so that deviation of a little inclination occurs more or less, and how to splice the areas, so that the dots in the areas can meet the required accuracy after splicing, is the key point in the method provided by the embodiment. Referring to fig. 3, the first dot printing is preferably performed in the second area 21 to ensure that the dots to be aligned below and above the first dot are positive, so as to reduce the accumulated error. Referring to fig. 3 and 4, the first dots 210 are printed in the second area 21, when the first dots 210 in the second area 21 are printed, first trapezoidal dots 211 are also printed at four corners outside the second area 21, each first trapezoidal dot 211 is an isosceles trapezoid formed by a plurality of circular dots, the distance between each circular dot and the circular dots adjacent in the left-right direction and the front-back direction is the same, and the long side of the isosceles trapezoid faces one side of the adjacent area. In the present embodiment, the vertical distance between the extreme edge of the first trapezoid dot 211 and the second region 21 is about 10 mm. In this embodiment, each first trapezoid dot 211 is preferably composed of a plurality of rows of circular dots, and the number of circular dots in the next row is two more than that of circular dots in the previous row, and in this embodiment, is preferably 4 rows, and the first row has 4 circular dots.
And S3, splicing mesh points. When the dots are spliced, the first trapezoidal dot 211 on the left is usually corrected first, and the first trapezoidal dot 211 on the right is corrected after the first trapezoidal dot 211 on the left is aligned, so that the splicing is completed after the first trapezoidal dots 211 on the left and the right are completely overlapped. The specific steps are as follows, and the embodiment will be described by taking the example of first splicing the dots in the first region 20 and the second region 21. Referring to fig. 5 and 6, the laser head 10 is first moved to the upper left corner area of the first area 20, and a second trapezoidal dot 201, which is arranged in a mirror image of the first trapezoidal dot 211, is printed in the upper left corner area of the first area 20.
As shown in fig. 7 and 8, fig. 7 shows the positional relationship between the first trapezoidal dot 211 and the second trapezoidal dot 201 before adjustment, and fig. 8 shows the positional relationship between the first trapezoidal dot 211 and the second trapezoidal dot 201 after adjustment. And (3) adopting an electronic magnifying glass with the magnification of 800 times, and guiding the picture into measurement software, wherein if the two trapezoids are found to be dislocated, namely the positions have deviation. It is therefore necessary to adjust the position by moving the stage 11 and the laser head 10 so that the deviation meets the requirements. For example, as shown in fig. 7, the data measured by the measurement software has a dot length of 0.265mm and an actual length of 2.45mm, and the magnification ═ 9.26 is obtained; the second trapezoidal dot 201 is shifted leftward from 9.26 × 0.012 to 0.11mm with respect to the first trapezoidal dot 211, so the laser head 10 should be shifted rightward by 0.11mm, the distance between two adjacent dots between the second trapezoidal dot 201 and the first trapezoidal dot 211 is 9.26 × 0.073 to 0.68mm, and the actual distance between two adjacent dots in the middle should be 0.45mm, so the second trapezoidal dot 201 is shifted downward from 0.68 to 0.45mm to 0.23mm with respect to the first trapezoidal dot 211, so the platform needs to be shifted forward by 0.23 mm; the final position after movement as shown in fig. 8 is the position standard.
Similarly, after the dots in the upper left corner region of the first region 20 are aligned, the second trapezoidal dot 201 in the upper right corner region of the first region 20 is printed, it is detected that the dots in the second trapezoidal dot 201 overlap with the dots in the first trapezoidal dot 211, if the dots overlap, it is indicated that the steel plate has a certain torsion angle in the horizontal direction, and therefore the dots need to be rotated by a specific angle, and the rotation angle is measured according to the actual measurement, so as to ensure that the second trapezoidal dot 201 and the first trapezoidal dot 211 are arranged in a mirror image manner, that is, the splicing position of the first region 20 and the second region 21 meets the requirement, and the dots in the first region which need to be dotted can be introduced.
Similarly, the stitching method of the third region 22 and the second region 21 is the same as that of the first region 20 and the second region 21, a third trapezoidal dot 221 arranged in a mirror image with the first trapezoidal dot 211 is printed at the lower left corner of the third region 22, and the third trapezoidal dot 221 arranged in a mirror image with the first trapezoidal dot 211 is printed at the lower right corner of the third region 22 after correction. The correction method of the third area 22 is the same as that of the first area 20, and therefore, the detailed description is omitted, and as shown in fig. 9, the dots in the first area 20, the second area 21 and the third area 22 are spliced into a whole to manufacture a 65-inch hot-pressing screen, the error between the dots in each area is below 0.02mm, the splicing taste effect meets the requirement of a large-size hot-pressing screen, and the first trapezoidal dot 211, the second trapezoidal dot 201 and the third trapezoidal dot 221 formed by a plurality of circular dots can successively complete the adjustment of the steel plate in the front-back, left-right and torsion angles, so as to ensure the realization of the dot splicing on the large-size hot-pressing screen.
The large-size hot-pressing screen printing plate manufactured by the manufacturing method of the large-size hot-pressing screen printing plate provided by the embodiment has the advantages that the taste of the large-size light guide plate pressed by the large-size hot-pressing screen printing plate meets the requirement, the cutting mark on the light guide plate is not obvious, the optical uniformity is good, the operation is simple and convenient in the production process of the large-size hot-pressing screen printing plate, a laser screen printing plate dotting machine with a larger stroke is not required to be purchased, or a machine table is not required.
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.
Claims (3)
1. A manufacturing method of a large-size hot-pressing screen printing plate is characterized by comprising the following steps:
s1, providing a steel plate, positioning and fixing the steel plate on a working platform of the laser screen dotting machine, planning a plurality of dot areas which are sequentially connected end to end along the same direction on the steel plate according to output dots, wherein each dot area corresponds to one part of the output dots, and defining that a laser head of the laser screen dotting machine moves in the left-right direction and the working platform moves in the front-back direction;
s2, selecting one of the dot areas as an initial area, printing corresponding dots in the initial area, taking the initial area as a reference area of an adjacent dot area, printing first trapezoid dots on the left side and the right side of the joint of the adjacent dot area, wherein each first trapezoid dot is an isosceles trapezoid formed by a plurality of circular dots, the distance between each circular dot and the adjacent circular dots in the left-right direction and the front-back direction is the same, and the long side of the isosceles trapezoid faces one side of the adjacent dot area;
s3, printing a second trapezoidal dot which is arranged in a mirror image mode with a trapezoidal dot on the same side on one of the left side and the right side of a first dot area adjacent to the initial area, compensating the position of the laser head in the left-right direction according to the position deviation of the first trapezoidal dot and the second trapezoidal dot, and compensating the position of the working platform in the front-back direction;
s4, after the step S3 is completed, printing a second trapezoidal dot which is arranged in a mirror image with the trapezoidal dot on the same side on the other side of the left side and the right side of the first dot area adjacent to the initial area, and compensating the dot in the first dot area in a torsion angle mode according to the position deviation of the first trapezoidal dot and the second trapezoidal dot;
s5, printing a corresponding screen dot in the first screen dot region;
s6, repeating the above steps S2, S3, S4 and S5 until all the halftone dot regions have corresponding halftone dots printed thereon, with the halftone dot region adjacent to the first halftone dot region as a reference region.
2. The method of manufacturing according to claim 1, wherein: the number of the plurality of dot areas planned on the steel plate is not less than three, and the starting area is positioned in the middle of all the dot areas.
3. The method of manufacturing according to claim 1, wherein: the first trapezoid screen dots are composed of a plurality of rows of circular screen dots, and the number of the circular screen dots on the next row is two more than that of the circular screen dots on the previous row.
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| CN201910887565.9A CN110587145B (en) | 2019-09-19 | 2019-09-19 | Manufacturing method of large-size hot-pressing screen printing plate |
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| CN201910887565.9A CN110587145B (en) | 2019-09-19 | 2019-09-19 | Manufacturing method of large-size hot-pressing screen printing plate |
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| CN113703087A (en) * | 2021-08-31 | 2021-11-26 | 厦门市益津鹭科技有限公司 | Buffer sheet and method for compensating impress of mesh points of middle light guide plate of hot-pressing roller |
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| CN110587145A (en) | 2019-12-20 |
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Denomination of invention: A method for making large-sized hot pressed screen plates Granted publication date: 20210525 Pledgee: Agricultural Bank of China Limited by Share Ltd. Xiamen Xiangan branch Pledgor: XIAMEN YIJINLU TECHNOLOGY CO.,LTD. Registration number: Y2024980019434 |
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