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Method of printing curved surface and curved surface body printed by using same

A technology of curved surface printing and curved body, applied in printing, printing presses, rotary printing presses, etc., can solve the problems of large ink volume, consuming a lot of time and energy, low printing accuracy, etc., and achieve the effect of low price

Active Publication Date: 2007-08-01
SHUHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As mentioned above, in the past, when printing an object with a curved surface, especially a single curved surface, it was carried out with a combination of curved surface printing blanket + gravure printing original plate. Therefore, the printing accuracy is low, and it is difficult to perform multi-color printing. of
Especially when gravure is used, due to the large amount of ink, there is a disadvantage that the printing accuracy of fine dots and the like is extremely poor.
[0009] In addition, regarding the shape and properties of the blanket, the setting of a shape with good flexibility that matches the curved surface to be printed, the setting of materials and surface conditions that meet the requirements for retention and separation of printing inks, and as a result, the The setting of conditions such as printing with good fidelity is almost always based on empirical wrong thinking, and the setting takes a lot of time and effort

Method used

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  • Method of printing curved surface and curved surface body printed by using same
  • Method of printing curved surface and curved surface body printed by using same
  • Method of printing curved surface and curved surface body printed by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Samples printed on curved surfaces:

[0090] D×L30mmφ×100mm polypropylene cylinder

[0091] Peripheral 180° surface printing

[0092] Blankets for curved surface printing:

[0093] R1, 2×L1 (bottom width)×top r 90mm×105mm×15mm

[0094] Material Silicone Rubber Hardness (JIS Class A) 15

[0095] Surface roughness a(0.1~0.3μm), b(0.5~2μm),

[0096] c(2.5~3.5μm), d(5~10μm), e(10~30μm)

[0097] Use ink:

[0098] UV ink

[0099] Letterpress Original:

[0100] Aluminum relief plate Sensitizer convex height 1μm

[0101] Standard grid pattern with line width 0.5±0.02mm and grid interval 5±0.3mm

[0102] printing press:

[0103] Horizontal moving 3-stage blanket printing machine (SHUHO-3 type)

[0104] Fabricate curved surface printing blankets 2 with different surface roughness, perform blanket printing on the sample to be printed on the curved surface in the above-mentioned steps A to C, respectively, in the A step for the remaining ink on the original pla...

Embodiment 2

[0110] Samples printed on curved surfaces:

[0111] D×L 30mmφ×100mm polypropylene cylinder

[0112] Peripheral 180° surface printing

[0113] Blankets for curved surface printing:

[0114] R1, 2×L1 (bottom width)×top r 90mm×105mm×15mm

[0115] Material Silicone rubber

[0116] Hardness (JIS Class A) 5, 15, 30, 40, 50, 60

[0117] Surface roughness 0.5~2μm

[0118] Ink used: UV ink

[0119] Letterpress Original:

[0120] Aluminum relief plate Sensitizer convex height 1μm

[0121] Standard grid printing machine with a line width of 0.5±0.02mm and a grid interval of 5±0.3mm:

[0122] Horizontal moving 3-stage blanket printing machine (SHUHO-3 type)

[0123] Only the hardness of the silicone rubber was changed, and other conditions remained unchanged, and the printing accuracy was compared.

[0124] FIG. 5 shows the results of experiments conducted on the relationship between the hardness H of the blanket and the printing accuracy.

[0125] Usually, silicone rubber has ...

Embodiment 3

[0128] Samples printed on curved surfaces:

[0129] D×d 400mmφ×30mmφ polypropylene ring

[0130] Printing on the surface of the ring divided into two parts in the axial direction (d outer peripheral 180° surface) × 2 times (both sides)

[0131] Blankets for curved surface printing:

[0132] R1, 2×L1×top r×D 90mm×105mm×15mm×400mm

[0133] Material silicone rubber

[0134] Hardness (JIS Class A) 15

[0135] Surface roughness 0.5~2μm

[0136] Ink used: UV type ink (color: brown, dark brown)

[0137] Letterpress Original:

[0138] Aluminum letterpress master plate Sensitizer convex height 0.2μm

[0139] Two-color fluorescent dye printing waveform non-continuous pattern

[0140] The upper and lower sides of the ring were physically printed twice, and as a result of the second printing, it was found that there were some printing misalignments on the printing joint surface, especially on the inner diameter side of the ring, but it was still within the allowable range as a com...

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Abstract

A curved surface printing method comprises a step of applying a printing ink to a raised portion of a letterpress printing original plate which is a planographic plate the raised portion of which is 0.1 to 50 mum high, a step in which an elastic blanket (2) of rubber or rubberish material having a curved surface (221, 222, 21) of a predetermined shape formed on a convex or concave surface of an object (1) to be printed and set in the same polarity direction as that of the convex or concave surface of the object (1) is pressed to the letterpress printing original plate placed in a fixed position and coated with the printing ink, and the printing ink is transferred to the curved surface (221, 222, 21) of the predetermined shape, and a step of moving the elastic blanket (2) to which the printing ink is transferred and which has curved surface (221, 222, 21) of the predetermined shape, bringing the elastic blanket (2) into contact with the curved surface of the object (1), and thus printing the object. A curved surface body printed by this method is also disclosed.

Description

technical field [0001] The present invention relates to a method of printing with high precision on a curved surface and a printed curved surface obtained by the method. Background technique [0002] Conventionally, the blanket printing method has been known as a method of performing various printing on a curved surface, particularly a single curved surface, of an object to be printed having a curved surface. That is, in the past blanket printing method, ink is applied to a gravure printing original plate made of steel or plastic, and the excess ink on the convex part is removed with a bamboo blade-like squeegee, and the surface of the soft curved blanket is pressed. Paste on the original printing plate, copy the ink left in the concave part of the original printing plate conductor, and then make the blanket contact the curved surface of the printed object to complete the printing. [0003] However, in this case, the original printing plate is conventionally made of steel o...

Claims

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Application Information

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IPC IPC(8): B41M1/40B41F17/34B41M1/02
Inventor 村冈贡治
Owner SHUHOU
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