Braille high-speed printing method

Abstract

The invention provides a high-speed braille printing method, which relates to the field of braille printing, and comprises the following steps: silicone oil printing: in the early stage, printing silicone oil with anti-white images and texts at the position of to-be-printed braille on a printing material through a special silicone oil screen printing plate, and forming a round anti-white silicone oil-free area in the silicone oil printing area through the special silicone oil screen printing plate; a round white-reflecting silicone-oil-free area is formed in a silicone oil printing area through a special silicone oil screen, then braille printing ink is printed on the round white-reflecting silicone-oil-free area and peripheral silicone oil through a rotary screen, and the peripheral printing ink is printed on the silicone oil and can shrink and thicken towards the middle under the influence of surface energy tension, so that the braille printing device can be matched with a high-speed rotary screen printing scene, and the braille printing effect is improved. Therefore, the braille printing efficiency can be improved, and the requirement of the national standard on the braille thickness can be met; the problems that in an existing braille printing method, in order to reach the national standard thickness, a screen printing plate with the high ink penetration amount is needed, foaming ink needs to be matched, and the printing speed is relatively low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of Braille printing, and in particular to a method for high-speed Braille printing. Background Art

[0002] As a kind of text designed specifically for the blind and perceived by touch, Braille plays a crucial role in the education, reading, information acquisition, etc. of the blind. With the development of society and the increasing attention to the care of the blind population, the demand for Braille books, teaching materials, various materials, etc. is constantly growing, which puts forward higher requirements for Braille printing technology. Currently, Braille printing technology is mainly divided into impact printing, thermoforming printing, inkjet printing, screen printing, etc.

[0003] However, there are still some deficiencies in the current Braille printing by screen printing. For example, the basic requirement of the current national standard for Braille printing is a thickness of ≥0.2 mm. However, to achieve this thickness, a screen with a very high ink penetration amount is required, combined with foaming ink, and the printing speed is relatively low. Basically, only a low-speed flat screen can meet the requirement. In the field of high-speed (>50 m / min) circular screens, it is basically impossible to achieve such a thick printing effect currently. This not only limits the improvement of Braille printing efficiency but also hinders the development of large-scale and high-efficiency Braille printing operations. Therefore, the present invention improves a Braille printing method that can use an ordinary screen to increase the printing speed to at least 50 m / min and the Braille thickness meets the national standard thickness. Summary of the Invention

[0004] The embodiment of the present disclosure relates to a method for high-speed Braille printing. By the method of silicone oil printing, in the early stage, silicone oil for printing reverse white graphics and texts is printed at the position where Braille is to be printed on the printing material. The printed silicone oil area forms a circular reverse white silicone oil-free area through a silicone oil special screen. Then, Braille ink is printed on the circular reverse white silicone oil-free area and the silicone oil near it. At this time, the peripheral Braille ink, because it is printed on the silicone oil, will contract and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. In this way, when printing Braille ink, it can adapt to the high-speed circular screen printing scenario, thereby not only improving the efficiency of printing Braille but also meeting the specification of the national standard Braille thickness.

[0005] In the first aspect of the present disclosure, a method for high-speed Braille printing is provided, including the following steps:

[0006] Step 1, preset the size of Braille dots. The specification of national standard Braille is a diameter of 1 - 1.6 mm, and we set it to 1.2 mm;

[0007] Step 2: Silicone oil printing. In the preliminary stage, silicone oil for printing reverse white graphics is printed on the position of the material to be printed with Braille through a special silicone oil screen printing plate. The printed silicone oil area forms a circular reverse white silicone oil-free area through the special silicone oil screen printing plate, and the diameter of the circular reverse white silicone oil-free area is 1.2 mm.

[0008] Step 3: Braille ink printing. After the silicone oil is printed on the material to be printed, Braille ink with an area larger than 1.13 mm² is printed on the circular reverse white silicone oil-free area and the silicone oil near it on the silicone oil through a special ink screen printing plate. At this time, for the circular reverse white silicone oil-free area with a diameter of 1.2 mm in the middle, since there is no silicone oil, the Braille ink can be printed firmly. For the Braille ink on the periphery, because it is printed on the silicone oil, it will contract and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. Since the diameter of the circular reverse white silicone oil-free area is 1.2 mm, the actual size of the Braille will be about 1.2 mm, and the error range is between 1.2 mm and 1.4 mm, so that the printed diameter size of the Braille is very stable.

[0009] Step 4: UV lamp curing. After the Braille ink is printed, the material to be printed with Braille ink is conveyed into the tunnel of the UV curing equipment. Subsequently, a UV light source is emitted by the UV lamp in the tunnel of the UV curing equipment, and the UV light source is used to cure the Braille ink. In order to allow the Braille ink printed on the silicone oil to have enough contraction time, we extend the curing time of the UV lamp for the ink to more than 4 seconds. According to a printing speed of 50 m / min, the paper path length for 4 seconds must be greater than 3.4 m. Therefore, the machine paper path needs to be slightly changed. Of course, this is the principle, and appropriate reduction or extension can be changed according to the actual situation. Here it is relatively simple and will not be described in detail.

[0010] In at least some embodiments, the theoretical area of the Braille dot described in Step 1 is πr² = π×(1.2 / 2)² = 1.13 mm².

[0011] In at least some embodiments, the material to be printed described in Step 2 is Braille printing paper.

[0012] In at least some embodiments, the special screen plate for ink in step three is a circular screen plate, specifically a circular silk screen plate. The thickness of the silk screen on the circular silk screen plate is between 0.05 - 0.1 mm. At this time, it is still far from the thickness of 0.2 mm of the Braille national standard. When setting the screen plate with a theoretical thickness of 0.1 mm, in order to reach a thickness of 0.2 mm, the printing area of Braille should be increased by at least 2 times (2 times of 1.13 mm²), that is, 2.26 mm², and the calculated diameter of Braille printing is > 1.7 mm. When setting the screen plate with a theoretical thickness of 0.05 mm, in order to reach a thickness of 0.2 mm, the printing area of Braille should be at least 4 times (4 times of 1.13 mm²), that is, 4.52 mm², and the calculated diameter of Braille printing is > 2.4 mm.

[0013] The present invention provides a method for high-speed Braille printing, which has the following beneficial effects:

[0014] 1. Through the method of silicone oil printing, in the early stage, silicone oil for printing reverse white graphics is printed on the position of the material to be printed with Braille. The area printed with silicone oil forms a circular reverse white silicone-free area, that is, the reverse white circle area, through a special screen plate for silicone oil. Then, Braille ink is printed on the circular reverse white silicone-free area and the silicone oil near it. At this time, the outer Braille ink is printed on the silicone oil, so it will shrink and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. In this way, when printing Braille ink, it can adapt to the high-speed circular screen printing scenario (printing speed > 50 meters per minute), thus improving the printing efficiency of Braille and meeting the specification of the national standard Braille thickness. Moreover, there is no need to cooperate with foaming ink, which not only fills the technical gap in the Braille thickness standard of high-speed circular screen printing, but also breaks through the shackles of traditional processes and realizes a double leap in the speed and quality of Braille printing.

[0015] 2. Through the circular reverse white silicone-free area formed by the area printed with silicone oil, when printing Braille ink on the circular reverse white silicone-free area and the silicone oil near it, because there is no silicone oil in the middle circular reverse white silicone-free area, the Braille ink can be printed more firmly. Not only is the ink not prone to displacement, falling off and other problems during the printing process, but also the defective rate is greatly reduced. Moreover, during the long-term use of the finished Braille reading material, the ink can always remain clear and the raised dots are stable, effectively extending the service life of the Braille reading material.

[0016] III. After the braille ink printing is completed, a UV lamp is used to cure it. Utilizing the high-energy characteristics of the UV light source, the curing effect of the braille ink can be significantly improved, greatly enhancing the quality of braille printing. At the same time, considering that after the braille ink is printed on the silicone oil surface, it needs to undergo a specific shrinkage process. To ensure the full shrinkage of the braille ink and create a more ideal shape, we specifically extend the curing duration of the UV lamp to more than 4 seconds. This optimization measure not only ensures that the braille ink still has high quality after shrinkage but also avoids problems such as poor ink adhesion and unsatisfactory bump morphology caused by insufficient curing time, providing strong guarantee for high-quality braille printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0018] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0019] In the accompanying drawings:

[0020] Figure 1 A schematic diagram after the silicone oil printing of the present application is shown;

[0021] Figure 2 A schematic diagram after the braille ink of the present application is printed on the anti-white silicone oil-free area and the silicone oil nearby is shown;

[0022] Figure 3 A schematic diagram showing the state of the braille ink of the present application in a shrunk and aggregated state within the anti-white silicone oil-free area is shown;

[0023] Figure 4 A schematic diagram showing the state of the UV lamp curing the braille ink of the present application with an extended time is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figures 1 to 4 :

[0026] The present invention provides a method for high-speed braille printing, including:

[0027] Step 1: Presetting the size of Braille dots. The specification of national standard Braille is that the diameter is 1 - 1.6 mm, and we set it to 1.2 mm.

[0028] Step 2: Silicone oil printing. In the preliminary stage, silicone oil for printing reverse white graphics is printed on the position of the Braille to be printed on the printing material through a special silicone oil screen plate. As shown in the appendix, the printed silicone oil area forms a circular reverse white area without silicone oil (reverse white circle) through the special silicone oil screen plate, and the diameter of the circular reverse white area without silicone oil is 1.2 mm. Figure 1 As shown in the appendix, the printed silicone oil area forms a circular reverse white area without silicone oil (reverse white circle) through the special silicone oil screen plate, and the diameter of the circular reverse white area without silicone oil is 1.2 mm.

[0029] Step 3: Braille ink printing. After the silicone oil is printed on the printing material, as shown in the appendix, Braille ink with an area larger than 1.13 mm² is printed on the circular reverse white area without silicone oil and the silicone oil nearby on the silicone oil through an ink - special screen plate. At this time, for the circular reverse white area without silicone oil in the middle with a diameter of 1.2 mm (reverse white circle), because there is no silicone oil, the Braille ink can be printed firmly, as shown in the appendix. For the Braille ink on the periphery, because it is printed on the silicone oil, it will shrink and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. The specific principle is: using the principle of the surface energy tension of silicone oil, just like water droplets forming water beads on a lotus leaf. We regard the Braille ink as water droplets, and a part of the printing material is printed with low - surface - energy silicone oil or low - surface - energy varnish. When the Braille ink is printed on the silicone oil, it will shrink violently and the thickness will increase. Figure 2 As shown in the appendix, Braille ink with an area larger than 1.13 mm² is printed on the circular reverse white area without silicone oil and the silicone oil nearby on the silicone oil through an ink - special screen plate. At this time, for the circular reverse white area without silicone oil in the middle with a diameter of 1.2 mm (reverse white circle), because there is no silicone oil, the Braille ink can be printed firmly, as shown in the appendix. For the Braille ink on the periphery, because it is printed on the silicone oil, it will shrink and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. The specific principle is: using the principle of the surface energy tension of silicone oil, just like water droplets forming water beads on a lotus leaf. We regard the Braille ink as water droplets, and a part of the printing material is printed with low - surface - energy silicone oil or low - surface - energy varnish. When the Braille ink is printed on the silicone oil, it will shrink violently and the thickness will increase. Figure 3 Due to the diameter of the circular reverse white area without silicone oil being 1.2 mm, the actual size of the Braille will be about 1.2 mm, and the error range is between 1.2 mm - 1.4 mm. Therefore, the diameter size of the Braille printing is very stable.

[0030] Due to the diameter of the circular reverse white area without silicone oil being 1.2 mm, the actual size of the Braille will be about 1.2 mm, and the error range is between 1.2 mm - 1.4 mm. Therefore, the diameter size of the Braille printing is very stable.

[0031] Step 4: UV lamp curing. After the Braille ink is printed, the printing material with the Braille ink printed on it is conveyed into the tunnel of the UV curing equipment. Subsequently, UV light source is emitted by the UV lamp in the tunnel of the UV curing equipment to cure the Braille ink. As shown in the appendix, in order to allow the Braille ink printed on the silicone oil to have enough shrinking time, we extend the time for curing the ink by the UV lamp to more than 4 seconds. According to a printing speed of 50 m / min, the paper path length for 4 seconds must be greater than 3.4 m. Therefore, the paper path of the machine needs to be slightly changed. Of course, this is the principle. Appropriate reduction or extension can be changed according to the actual situation. Here it is relatively simple and will not be described in detail. Figure 4 As shown in the appendix, in order to allow the Braille ink printed on the silicone oil to have enough shrinking time, we extend the time for curing the ink by the UV lamp to more than 4 seconds. According to a printing speed of 50 m / min, the paper path length for 4 seconds must be greater than 3.4 m. Therefore, the paper path of the machine needs to be slightly changed. Of course, this is the principle. Appropriate reduction or extension can be changed according to the actual situation. Here it is relatively simple and will not be described in detail.

[0032] The theoretical area of the Braille dot in Step 1 is πr² = π×(1.2 / 2)² = 1.13 mm².

[0033] The printing material in Step 2 is Braille printing paper, and the thickness of the Braille printing paper is much thicker than that of ordinary printing paper.

[0034] The special ink screen plate in step three is a circular screen plate, specifically a circular silk screen plate. The thickness of the silk screen on the circular silk screen plate is between 0.05 - 0.1 mm. At this time, it is still far from the thickness of 0.2 mm of the Braille national standard. When setting the screen plate with a theoretical thickness of 0.1 mm, in order to reach a thickness of 0.2 mm, the printing area of Braille should be increased by at least 2 times (2 times of 1.13 mm²), that is, 2.26 mm². The calculated diameter of Braille printing is > 1.7 mm. When setting the screen plate with a theoretical thickness of 0.05 mm, in order to reach a thickness of 0.2 mm, the printing area of Braille should be at least 4 times (4 times of 1.13 mm²), that is, 4.52 mm². The calculated diameter of Braille printing is > 2.4 mm.

[0035] However, through the method of silicone oil printing, the printed Braille ink can shrink and gather towards the middle and become thicker under the action of the surface energy tension of the silicone oil. In this way, a circular screen plate can be used during Braille ink printing. In this way, Braille ink printing can adapt to the high-speed circular screen plate printing scenario (printing speed > 50 meters per minute). Thus, it not only improves the efficiency of Braille printing but also meets the specification of the national standard Braille thickness, and there is no need to cooperate with foaming ink. It not only fills the technical gap in the Braille thickness standard for high-speed circular screen plate printing but also breaks through the shackles of traditional processes, achieving a double leap in the speed and quality of Braille printing.

[0036] In this article, the following points need to be noted:

[0037] 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the usual designs.

[0038] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0039] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for high-speed braille printing, characterized in that: The following steps are involved: (1) Preset the size of the Braille dots. The national standard for Braille is 1-1.6mm in diameter, and we set it to 1.2mm. (2) Silicone oil printing: In the early stage, a silicone oil-specific screen is used to print the silicone oil with a white-reflective image at the location of the Braille to be printed on the printing material. The printed silicone oil area is formed into a circular white-reflective silicone oil-free area through the silicone oil-specific screen, and the diameter of the circular white-reflective silicone oil-free area is 1.2 mm; (3) Braille ink printing: After the silicone oil is printed on the printing material, a Braille ink with an area greater than 1.13 mm² is printed on the circular white-non-silicone oil area on the silicone oil and on the silicone oil near it through a special ink screen. At this time, the circular white-non-silicone oil area with a diameter of 1.2 mm in the middle can be printed with Braille ink very firmly because there is no silicone oil. The Braille ink on the periphery will shrink and gather in the middle and become thicker because it is printed on the silicone oil. (4) UV lamp curing. After the braille ink is printed, the printed material is transported to the tunnel on the UV curing equipment. Then, the UV lamp in the tunnel of the UV curing equipment emits a UV light source, and the braille ink is cured by the UV light source. In order to allow the Braille ink printed on silicone oil to have enough time to shrink, we extended the UV lamp curing time of the ink to more than 4 seconds; to meet the printing speed of 50 meters / minute, the paper path length in 4 seconds must be greater than 3.4 meters; therefore, the machine paper path needs to be slightly changed.

2. A method for high-speed Braille printing according to claim 1, characterized in that: The theoretical area of ​​the Braille dot described in step (1) is πr²=πX(1.2 / 2)²=1.13mm.

3. The method for high-speed Braille printing according to claim 1, characterized in that: The printing material described in step (2) is Braille printing paper.

4. The method for high-speed Braille printing according to claim 1, characterized in that: The ink-specific screen described in step (3) is a round screen, specifically a round screen silk screen. The thickness of the screen on the round screen silk screen is between 0.05 and 0.1 mm. At this time, it is still far from the thickness of 0.2 mm required by the national standard for Braille. When the screen with a theoretical thickness of 0.1 mm is set to be used, in order to achieve a thickness of 0.2 mm, the area of ​​Braille printing is at least increased by 2 times, that is, 2.26 mm², and the diameter of Braille printing is estimated to be greater than 1.7 mm. When the screen with a theoretical thickness of 0.05 mm is set to be used, in order to achieve a thickness of 0.2 mm, the area of ​​Braille printing is at least increased by 4 times, that is, 4.52 mm², and the diameter of Braille printing is estimated to be greater than 2.4 mm.

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