JPH0218080A - Printing on three-dimensional surface - Google Patents

Abstract

PURPOSE:To enable an optional printing material and an optional printing means to be adopted by conforming to its use and besides, to make printing cost low by a method wherein an angular surface part is provided to a matter to be printed, and printing is performed so that at least one part of a printing part of the angular surface part to be printed simultaneously with each printing surface overlaps the printing surface. CONSTITUTION:A projected material formed by alternately adjacent horizontal faces 10, 10 and vertical faces 20, 20 is used as a three dimensional matter to be printed B, and continuous printing is performed on each horizontal face and each vertical face 20. Printing is performed by dividing into two steps of a horizontal face 10 printing process and a vertical face 20 printing process. A printing plate for horizontal face 40 has a depressed form corresponding to a projected form of the matter to be printed B containing an angular face part, and printing ink (e1) is laid on a horizontal plate face 41 of the printing plate 40 and a part of a rhombic face part plate face 42. As a means for laying printing ink (e1) on the printing plate 40, the same means as ordinary printing method such as coating with a roller or the like can be adopted. When printing is performed by pressing such a printing plate 40 onto the matter to be printed B from vertical direction, printing ink (e1) is printed on whole the horizontal face 10 of the matter to be printed B and on the midway of the angular face part 30.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of printing on a three-dimensional surface, and more particularly, to a method of continuously printing across multiple surfaces of a printing medium having a three-dimensional shape. It is.

[Conventional technology]

BACKGROUND ART In recent years, there has been a demand for printed circuits to be formed on the surfaces of substrates or block-shaped substrates having three-dimensional shapes as printed circuits in electronic component manufacturing and mounting technology. In such a printed circuit formed on a three-dimensional surface, it is necessary to form a continuous printed circuit across a plurality of surfaces.

However, when printing across multiple surfaces, for example, printing on vertical and horizontal surfaces at the same time, the printing plate must be moved along one direction, either vertically or horizontally, so the printing plate is removed from the printing surface after printing. When leaving, there was a problem that the printed pattern on the opposite side would be rubbed and damaged, and the usual method of forming printed circuits on a flat surface could not be applied as is.

Therefore, conventional methods for forming printed circuits on three-dimensional surfaces include:
For example, a method as shown in FIG. 8 has been adopted. In this method, a photosensitive ink f is applied to all of the plurality of printing surfaces of the printing material B, and a transparent body P made of glass, synthetic resin, etc. has an uneven shape corresponding to the shape of the printing material B. After forming a light-blocking layer m corresponding to the printing pattern and covering the printing material B with the transparent body P, light is irradiated from the outside of the transparent body P, so that the light of the photosensitive ink f is The portions not covered with the blocking layer m are exposed to light to form a predetermined printing pattern. The printed pattern of this photosensitive ink f is used as a resist layer or the like for forming a conductive printed circuit.

Moreover, instead of printing a plurality of printing surfaces at the same time, as shown in FIG. 9, each printing surface a of the printing material is printed.

A method of printing separately for each of b and c using an appropriate printed circuit forming means such as a silk screen printing method has also been considered.

[Problem to be solved by the invention]

However, among the above-mentioned prior art techniques, the former method requires the use of a special material called photosensitive ink, resulting in high costs, and it is difficult to use the printed pattern of photosensitive ink for circuit formation such as plating. However, there were many restrictions due to the properties of the photosensitive ink, and there was a problem that it was inferior in versatility.

In addition, in the latter method of printing each printing surface separately, there are no restrictions on the printing ink or printing method, but it is difficult to print the ridge line part where each printing surface intersects at a certain angle, and this ridge line part is difficult to print. There is a concern that printing may be cut off in some areas. In the case of printed circuits, if the printed circuits that are continuous on multiple printing surfaces are interrupted or printed incorrectly, it may cause disconnections or circuit defects, so particularly high precision and quality are required for the printing finish. However, the method of the prior art described above is difficult to put into practical use because defects tend to occur in the ridge line portion.

Continuous printing across multiple three-dimensional surfaces is required not only for the formation of printed circuits for electronic components as described above, but also for various printing applications for various products. This is a technology that can be used.

Therefore, the object of this invention is to solve the above-mentioned problems of the prior art, and to print on multiple three-dimensional surfaces with good quality, precision, and low cost using standard printing ink and printing means. The goal is to provide a method that can be used.

[Means to solve the problem]

In order to solve the above problems, the method of printing on a three-dimensional surface according to the present invention first sets the external shape of the printing material to the adjacent portions of two adjacent printing surfaces among a plurality of printing surfaces.
A ridge surface portion is formed by cutting off a ridge line formed by two printed surfaces diagonally. When each printing surface is printed separately, each printing surface and at least a part of the ridge surface are printed at the same time, and the printed parts of the ridge surface formed when printing each printing surface are at least one part of each other. I try to print the parts so that they overlap each other.

[For production]

The angle at which the ridge surface intersects each printing surface, that is, the intersection angle, is much larger than the intersection angle between each printing surface, so even if the ridge surface is printed at the same time as each printing surface, the ridges will be affected by the movement of the printing plate. The possibility of the printing on the surface being destroyed is extremely reduced. In other words, the printed portions of each printed surface and the ridged surface are reliably finished in succession, and the printing accuracy is high and the quality is excellent. In addition, since the printed parts of the ridge side printed at the same time as each printing side overlap each other at least in part, gaps may occur between the printed parts of the ridge side printed separately. This ensures that the images are printed in a continuous manner.

〔Example〕

Next, the present invention will be explained in detail below with reference to the drawings showing examples.

1 to 5 show the printing method according to the present invention step by step.

First, as shown in FIG. 1, a three-dimensional printing substrate B having a convex shape in which horizontal surfaces 10.10 and vertical surfaces 20.20 are adjacent to each other alternately is used, and each horizontal surface lO and vertical surface 20. As is clear from Figure 0, the horizontal plane 10 and the vertical plane 20 are 90 degrees apart from each other.
They are arranged at intersecting angles of °. At an adjacent portion where the horizontal surface 10 and the vertical surface 20 intersect, a narrow ridge surface portion 30 is formed by cutting off the ridge line at an angle of 45 degrees. Therefore, the intersection angles between the ridge surface portion 30 and each vertical surface 20 and horizontal surface 10 are all 135 degrees.

Printing is performed in two stages: a printing process on the horizontal surface 10 and a printing process on the vertical surface 20, and FIG. 1 shows the printing process on the horizontal surface 10. The horizontal printing plate 40 has a concave shape corresponding to the convex shape of the printing material B including the ridged surface, and the printing ink e1 is placed on the horizontal printing plate 41 and a part of the ridged surface 42 of the printing plate 40. . Printing ink e on printing plate 40
, can be applied by means similar to ordinary printing methods, such as coating with a roller. 40 such printing plates
When printed by pressing it against printing material B from the vertical direction,
As shown in FIG. 2, the printing ink e is printed on the entire horizontal surface 10 of the printing material B and halfway up the ridged surface portion 30. As shown in FIG.

Next, as shown in FIG. 3, the vertical surface printing plate 50 has a shape corresponding to the shape of both side surfaces of the printing medium B, that is, the vertical surfaces 20 on both sides, and the ridged surface portions 30, 30 at both ends thereof. A pair of printing plates 50 are used, and printing ink e3 is placed on a vertical plate surface 51 and a part of a ridge plate surface 52 of the printing plate 50. When such a printing plate 50 is pressed against the substrate B from the horizontal direction, as shown in FIG. be done. And this printing ink e2
is integrated with the printing ink e printed in the previous step, and the entire surface of the printing material B is printed.

As shown in FIG. 5, in the ridge surface portion 30, a portion of the printing ink e printed in the later process is superimposed on the edge of the printing ink e printed in the previous process. Since the printing inks e1 and e are printed and integrated, there is no seam or gap between the printing inks e1 and e.

Although the above explanation schematically provides an overview of the printing method of the present invention, the printing plate 40 may vary depending on the specific purpose of printing.
．． The structure of 50, the material of printing ink el+e8, the printing process, etc. can be freely changed without departing from the scope of the claims of the present invention.

The shape of the printing material B is not limited to the illustrated shape, but can be implemented in various three-dimensional shapes. The intersection angle of two adjacent printing surfaces is
In addition to the 90° shown, obtuse angles of 90° or more or 90°
An acute angle of less than ° may be used. The ridge surface portion 30 has the printed surfaces 1 on both sides.
It is desirable that they intersect at the same angle as 0.20, but depending on the state before printing or the structure of the printing plate, the ridge surface and the printing surfaces on both sides may intersect at different angles. The mausoleum part 30 is
It is sufficient to have a width that allows printing parts from both directions to partially overlap, and it is sufficient to make it as narrow as possible so as not to adversely affect the function of the printing substrate B. Mausoleum part 3
Regarding the overlap of printing in both directions at 0, it is sufficient that at least a portion thereof overlaps to the extent that continuous printing can be ensured, but the entire ridge line portion may overlap. Furthermore, the printing surface 10.
20 and the ridged surface portion 30 may not only have a planar shape as shown in the figure, but may also have a gentle curved shape.

The printing plates 40 and 50 can be made of letterpress, intaglio, or other commonly used printing methods. In addition, it may be divided as appropriate to suit the structure of the printing material and convenient for the printing process.

Printing ink e 1 + e! The same printing methods as normal printing methods can be used freely according to the purpose.

Specifically, in addition to painting inks for so-called patterning and coloring, various cutting function materials formed by printing, such as resist inks for forming printed circuits, conductive metal pastes, and insulating overcoats, can be used. I can do it.

Figures 6 and 7 show 5O
A case is shown in which a mold made of metal such as S304 is used as the printing material B, and a printed circuit is formed on the surface thereof. After a printed circuit is formed on the surface of the mold, it is used as a synthetic resin molding mold, and the printed circuit is integrally formed by transferring the printed circuit formed on the surface to the synthetic resin molded body. This is to manufacture electronic circuit parts made of synthetic resin molded bodies.

A groove 60 corresponding to the circuit pattern of the printed circuit is formed on the surface of the printing material B. The groove 60 may be formed at the same time as the printing medium B is formed. A printed circuit is formed in this groove 60 portion by circuit forming means such as plating, but it is necessary to cover the portion other than the groove 60 in the circuit forming process. Therefore, the surface 61 other than the groove 60
A resist layer is printed and formed on the area (indicated by hunting in the figure). The printing ink for forming the resist layer may be the same as that used in normal printing methods. FIG. 7 shows the horizontal printing step, which is the second step of the printing process. The printing plate 50 is different from the embodiments shown in FIGS. 1 to 5 described above, except that the printing plate 50 is a metal plate made of stainless steel or the like which is bent to fit the three-dimensional shape of the printing medium B by means such as press processing. Since the steps are similar, detailed explanation will be omitted.

The printing method of the present invention is most effective when used for precise printing on complex three-dimensional surfaces, such as printing a resist layer on a mold for forming an electronic circuit as described above. It can also be applied to various printing applications with similar problems or requirements.

〔Effect of the invention〕

According to the method of printing on a three-dimensional surface according to the present invention as described above, a ridged surface portion is provided on the printing material, and the number of printed portions of the ridged surface portion to be printed at the same time on each printing surface is reduced (or some portions overlap). By printing on two-dimensional surfaces, it is possible to perform continuous printing with extremely high precision on adjacent printing surfaces at a certain intersection angle.In other words, in the conventional method of printing three-dimensional surfaces separately for each printing surface, , printing defects tend to occur in the ridge line portions between the printed surfaces, but in this invention, each printed surface and the ridge surface portion are simultaneously and reliably continuous by interposing the ridge surface portions adjacent to each other at a large intersection angle with each printing surface. Moreover, by overlapping the printed surfaces of the ridged surface that are printed simultaneously with the printed surfaces on both sides, the printed surfaces of the ridged surface can be printed continuously and accurately.

Furthermore, in the case of this invention, printing conditions such as printing ink and printing plates may be the same as those for normal printing, and there is no need to use special materials, so any printing material or printing method can be used depending on the printing purpose. Not only that, but the printing cost is also low.

[Brief explanation of the drawing]

1 to 4 are schematic sectional views showing an embodiment of the printing method according to the present invention in the order of steps, FIG. 5 is an enlarged view of the main part of FIG. 4, and FIG. 6 is a cover showing another embodiment. A perspective view of the main parts of the printed matter,
FIG. 7 is a front view showing the printing process, FIG. 8 is a sectional view of a conventional example, and FIG. 9 is a sectional view of another conventional example. B...Printing surface 10.20...Printing surface 30...
・Ryomen part 40.50...Print version el+el...
Printing Ink Figure 1 Figure 2 Agent Patent Attorney Takehiko Matsumoto Figure 3 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] 1 A method of forming a continuous printed area on two adjacent printing surfaces at a certain intersection angle of a three-dimensional printing substrate, in which a ridge line is cut diagonally on the adjacent portions of the two printing surfaces. A ridge surface portion is formed in advance, and each printing surface is printed separately, and the printing surface and at least a part of the ridge surface portion are printed simultaneously, and the printed portions of the ridge surface portion formed when printing each printing surface are A method for printing on a three-dimensional surface, characterized by printing so that at least some parts overlap each other.