JPH0920086A - Screen plate and printing method using the screen plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To print efficiently with stable quality by specifying a ratio between a height of a step and a distance from a glass plane end part of a screen plate to an outer periphery. SOLUTION: When a printing is to be performed on a periphery of a plate- like base body 4 such as a glass by screen printing method, a printing pattern 2 of a screen plate 1 is provided ranging from a plane end part (a) of the plate- like base body 4 to an outer periphery (b) of a distance L1 (L1>=0). On the surface of the screen plate 1, a step 3 having a height D (D>=0.3mm) and a width W (W>=D) is provided along the printing pattern 2 from the plane end part (a) of the plate-like base body to an outer periphery (c) of a distance L2 (L2>=1). When a continuous printing is to be performed, for preventing an ink from being pushed out from the rear face of the screen plate, a ratio between the height D and the distance L2 from the glass plane end part (a) of the screen plate to the outer periphery (c) where the step 3 is to be provided is set to D/L2>=0.5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen plate and a printing method using the screen plate.

[0002]

2. Description of the Related Art When printing is performed up to the edge of a glass, the printing pattern of the screen plate is set to be larger than the glass outer shape in consideration of the glass outer shape tolerance. When printing is performed in this state, ink is pushed out from the back surface of the screen plate outside the flat end portion of the glass, and the glass to be printed next is stained.

Therefore, as a conventional technique, 1) a method of dividing a print pattern into a plurality of steps for printing (Japanese Patent Laid-Open No. 4-279382), and 2) printing the glass in a predetermined outer shape after oversizing the outer shape of the glass Method of cutting (Japanese Patent Laid-Open No. 5-70164), 3) Method of masking the periphery of the glass in advance, printing oversize on the outside of the glass, and then removing the masking (Japanese Patent Laid-Open No. 5-7017)
9), 4) A method has been proposed in which the ink extruded on the back surface of the screen printing plate is removed by air pressure after printing oversize from the glass outer shape (Japanese Patent Laid-Open No. 5-70180).

However, in each method, 1) it is inefficient to print in a plurality of steps, 2) if the glass is cut after printing, the ink around the cut portion is likely to be peeled off and the quality is not stable, 3) masking When applied and printed, the cost for masking is high. 4) There is a problem that a dedicated removal equipment is required to remove the ink by air pressure.

[0005]

DISCLOSURE OF THE INVENTION The present invention is efficient,
An object of the present invention is to provide a screen plate that can perform printing even at the edge of the glass flat surface with stable quality and a printing method using the screen plate.

[0006]

According to the present invention, in a screen printing plate in which a peripheral portion of a plate-shaped substrate is printed by a screen printing method, the printing pattern of the screen printing plate is L1 (L1 ≧ 0) from the flat end of the plate-shaped substrate. ) And the height D on the surface of the screen plate.
(D ≧ 0.3 mm) and a width W (W ≧ D) stepped portion provided along the printing pattern from a position L2 (L2 ≧ L1) from the plane end of the plate-shaped substrate. A printing method using the screen plate is provided.

An embodiment of the present invention will be described below.
FIG. 1 is a front view of the basic configuration of a screen plate according to the present invention, FIG. 2 is a sectional view taken along line AA ′ before printing, and FIG.
-A 'sectional drawing, FIG. 4 shows the AA' sectional drawing after printing.

1 is a screen plate, 2 is a screen plate printing pattern, 3 is a stepped portion provided on the screen plate surface, 4
Is glass as a plate-like substrate, 5 is a squeegee, 6 is a glass fixing frame arranged adjacent to the outer periphery of the glass, 7 is a gap formed between the squeegee 5 and the screen plate 1 during printing, 8 is a glass edge after printing Ink applied up to the portion a, and 9 is the ink left on the screen plate without being extruded after printing.

The printing pattern 2 of the screen printing plate, that is, the portion where the ink oozes out, is provided from the glass flat end portion a to the outer periphery b at a distance L1 (L1 ≧ 0), and the screen printing plate surface has a high height. Sa D (D ≧ 0.3m
m) and the width W (W ≧ D) of the stepped portion 3 is the glass plane end portion a.
To L2 (L2 ≧ L1) from the position of the outer circumference c (FIG. 2).

In consideration of preventing the ink from being pushed out from the rear surface of the screen plate outside the glass flat end a of the screen plate even when printing is continuously performed, the height of the step portion 3 is considered. The ratio D / L2 of D and the distance L2 from the flat end a of the screen plate glass to the outer periphery c where the step portion is provided is preferably D / L2 ≧ 0.5, since good results can be obtained during continuous printing. .

The material of the step portion 3 is not particularly limited as long as it has flexibility with respect to the screen plate, solvent resistance with respect to ink, and abrasion resistance against squeegee.

On the other hand, in consideration of making the ink parting at the flat end portion a of the glass clear, lower than the glass surface by D (D is the height of the step portion provided on the surface of the screen plate) adjacent to the outer circumference of the glass. It is preferable to print using the glass fixing frame 6 provided on the surface.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the step portion 3 provided on the screen plate works as follows to suppress the extrusion of ink from the back surface of the screen plate outside the glass plane end a of the screen plate, Printing can be stably performed up to the glass flat end a.

When printing, the printing pressure from the squeegee 5 is transmitted to the glass 4 through the printing pattern 2 of the screen plate inside the flat surface edge a of the screen plate 1 and the ink is applied to the glass 4. (Figure 3).

On the other hand, the glass flat end a of the screen plate 1
On the outer side, the printing pressure from the squeegee 5 pushes down the screen plate 1 by the step portion 3 and creates a gap 7 between the squeegee 5 and the printing pattern 2. This allows
Since the printing pressure from the squeegee 5 to the printing pattern 2 on the screen plate becomes zero, the ink is not pushed out from the back surface of the screen plate (FIG. 3).

After printing, the ink 8 is printed up to the glass plane end a, and the ink 9 is not extruded to the back side of the screen plate but left on the upper side of the screen plate outside the glass plane end a of the screen plate. It will remain as it is (Fig. 4).

[0017]

EXAMPLE In FIG. 2, the printing pattern 2 of the screen plate is provided from the glass plane end portion a to the outer periphery b at a distance L1 = 0.5 mm. A polycarbonate sheet 3 having a thickness D = 0.5 mm and a width W = 20 mm is adhered to a position on the outer circumference c at a distance of from L2 = 1.0 mm. Further, a glass fixing frame 6 is provided adjacent to the outer circumference of the glass, and the upper surface of the fixing frame 6 is a surface lower than the glass surface by D = 0.5 mm.

As a result of printing in the above-mentioned state, the ink was printed up to the glass flat end a, and the ink cutoff at the flat glass end a was extremely clear. Further, even after the continuous printing of 2000 sheets, the printing condition was good as described above, and no ink dripping was observed on the back surface of the screen plate.

[0019]

Industrial Applicability The present invention has an excellent effect that printing can be performed efficiently, with stable quality, and easily when printing is performed up to the glass flat end portion a.

In particular, the ratio D / L of the height D of the step portion 3 and the distance L2 from the screen plate glass flat end a to the outer periphery c.
By setting 2 to D / L2 ≧ 0.5, the effect that the ink is not pushed out from the back surface of the screen plate outside the glass plane end portion a of the screen plate even during continuous printing is recognized.

Further, by performing printing using the glass fixing frame 6 provided on the surface D lower than the glass surface adjacent to the outer circumference of the glass, the effect of making the ink parting at the glass flat end a clear is recognized. To be

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a printing method of the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A ′ in FIG. 1 before printing.

FIG. 3 is a cross-sectional view of the portion A-A ′ in FIG. 1 during printing.

FIG. 4 is a cross-sectional view taken along the line A-A ′ in FIG. 1 after printing.

[Explanation of symbols]

1: Screen plate 2: Printing pattern of the screen plate 3: Stepped portion provided on the surface of the screen plate 4: Glass 5: Squeegee 6: Glass fixing frame arranged adjacent to the outer periphery of the glass 7: Squeegee 5 and the screen plate during printing 1. Gap formed between the ink and the ink 8: Ink applied to the glass flat end a after printing 9: Ink left on the screen plate without being extruded after printing

Claims (4)

[Claims] 1. In a screen printing plate for printing on the peripheral portion of a plate-shaped substrate by a screen printing method, the printing pattern of the screen printing plate is L1 (L1 ≧ L1)
0) is provided up to the outer circumference, and the screen plate surface has a height D (D ≧ 0.3 mm) and a width W.
The stepped portion of (W ≧ D) is L2 from the flat end of the plate-shaped substrate.
A screen plate provided along a print pattern from a position at a distance of (L2 ≧ L1). 2. The ratio D / L2 of the height D of the step portion to the distance L2 from the edge portion of the plate-shaped substrate to the step portion is D / L2 ≧ 0.
5. The screen plate according to claim 1, which is 5. 3. A method of printing on a peripheral portion of a plate-shaped substrate by a screen printing method, wherein the screen printing according to claim 1 or 2 is used as a screen printing. 4. In the printing method, a plate-like substrate fixing frame is used adjacent to the outer periphery of the plate-like substrate, and the upper surface of the fixing frame is lower than the plate-like substrate surface by a distance of a height D of a step portion. The printing method according to claim 3, wherein printing is performed as a surface.