JP2995171B2 - Masking film for plate production, method and apparatus for producing the film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a masking film used for producing a printing plate using a photocurable resin, a method for producing the same, and an apparatus for producing the same.

[0002]

2. Description of the Related Art When printing corrugated sheet paper or newspaper,
A printing plate formed of a photocurable resin that is liquid in a stored state, but is cured by irradiation of ultraviolet rays is used. A printing plate (9) in which a printing plate main body (91) for printing the mark "AB" shown in FIG. 12 is attached to a mounting film (95).
The method of manufacturing the printing plate main body (91) will be described (the mark appears as the inverted mark (12) on the printing plate surface). FIG. 13 shows a negative film (1) and a masking film (44) used for producing the printing plate main body (91). Negative film (1) has the above mark
A light-transmitting pattern (11) corresponding to (12) is formed, and the hatched portions other than the light-transmitting pattern (11) are light-shielding surfaces. The masking film (44) is composed of three layers in which a transparent film (45) is sandwiched between a semi-light-shielding film (46) and a light-shielding film (47). A light-transmitting pattern (48) slightly larger than the pattern (11) is formed, and the light-shielding film (47) includes a semi-light-shielding film (46).
A light transmitting pattern (49) larger than the light transmitting pattern (48) is formed.

As shown in FIG. 14, a negative film (1) and a transparent film (81) are placed on a transparent table (8), and a weir (83) is provided on the transparent film (81). A photocurable resin liquid (90) is poured into the container. A transparent base film (82) and the masking film (44) are put on the photocurable resin liquid (90). Light from a lamp (84) is irradiated from below the table (8) and from above the masking film (44). Photocurable resin liquid (90)
Are the light-transmitting pattern (11) of the negative film (1), the light-transmitting pattern (48) of the masking film (44), and the semi-light-shielding pattern (4).
Cured according to 9), the light transmission pattern of the negative film (1)
The part corresponding to (11) is the relief part (9
2), the portion corresponding to the light-transmitting pattern (48) is a mount portion (93) for reinforcing the relief portion (92), and the portion corresponding to the semi-light-shielding pattern (49) is a thin base portion (94). Becomes With the transparent base film (82) and the base portion (94) adhered, the excess photo-curable resin liquid (90) is washed off, the transparent base film (82) is cut into an appropriate size, and the mount film (95) is cut. Glue.

[0004]

The masking film (44) is formed by forming a light-transmitting pattern (48) on a semi-light-shielding film (46), and then forming the semi-light-shielding film (46) and the light-shielding film (47).
Is adhered to a transparent film (45), and the light-shielding film (47) is cut out with a contour larger than the light-transmitting pattern (48) of the semi-light-shielding film (46). The work of cutting off the light-shielding film is performed manually, and the quality is not constant. If the cutout size is too large, the area of the base (94) of the manufactured printing plate becomes large, and the amount of the expensive photocurable resin liquid (90) used increases. If the cutout size is too small, the bonding strength with the transparent base film (82) will be weak. Further, the masking film (44) has many production steps, and some parts depend on manual work as described above, resulting in poor production efficiency and high cost.
The three-ply masking film (44) is thick, cumbersome and bulky. Further, a step is formed on the masking film (44) due to film cutting, and it is difficult to wipe off dust on the film surface.

According to the present invention, a light-transmitting pattern and a semi-light-shielding pattern of a masking film are mechanically determined based on the light-transmitting pattern of a negative film, and these patterns can be automatically formed on one film. Thus, a masking film capable of solving the above-mentioned conventional problems, a method of manufacturing the film, and a manufacturing apparatus are clarified.

[0006]

A masking film of the present invention
(4) has a semi-light-shielding pattern (42) with a substantially constant width surrounding the light-transmitting pattern (43), and the outside of the semi-light-shielding pattern (42) is a light-shielding portion (41), It is a single layer with no steps on the surface.

The method of manufacturing a masking film according to the present invention is such that a negative film (1) having a light-transmitting pattern (11) formed thereon and a semi-light-shielding film (2) are superimposed on one another, and The photosensitive film (3) is stacked on the negative film (1) while irradiating light from the opposite side of the photosensitive film (3).
And a semi-light-shielding film (2) set, and a photosensitive film (3)
And relative displacement by circular motion
The semi-light-shielding pattern (4) which is larger than the light-transmitting pattern (11) of (1)
2) is formed on a photosensitive film (3), and then a semi-light-shielding film
(2) is removed and the negative film (1) and the photosensitive film (3) are moved relative to each other in the semi-light-shielding pattern (42) of the photosensitive film (3) by a relative circular motion smaller than the circular motion. A light-transmitting pattern (43) is formed which is smaller and larger than the light-transmitting pattern (11) of the negative film (1).
The semi-light-shielding film (2) may be a film in which the entire film is evenly semi-light-shielding, or a halftone film in which dots called dot are studded.

[0008] The masking film manufacturing apparatus of the present invention comprises:
A film mounting table (51), a synthetic circular motion device (6) for supporting a film to be mounted on the mounting table (51) and performing a synthetic circular motion on the mounting table, and The synthetic circular motion device (6) is constituted by a lamp (53) for irradiating a film, and comprises a first base plate (63) that circularly moves in a plane parallel to the mounting table (51); (63) a second base plate (72) on which a circular motion is performed independently of the circular motion of the base plate;
A film mounting portion (74) provided on the second base plate (72),
The first circular motion driving device (20) connected to the first base plate (63)
0) and a second circular motion driving device connected to the second base plate (72).
(300), and either one of the first circular motion driving device (200) and the second circular motion driving device (300) temporarily stops the circular motion function as necessary. It is characterized by being possible.

[0009]

[Effect] Since there is only one masking film (4), it is easy to handle and it is not bulky. Since there is no step on the surface of the masking film (4), it is easy to wipe off dust. The masking film (4) can be formed by exposing the necessary portions of the photosensitive film (3) as much as necessary, so that it is thinner and easier to handle than the conventional three-layer masking film.
Also, it can be produced at low cost. The negative film (1) is originally necessary for forming the relief portion (92) of the printing plate, and the semi-light-shielding film (2) can be used repeatedly.
No specially processed film is required to form the masking film (4), and no manual work is required on the film. The light-transmitting pattern for mounting portion (43) having a larger outline than the light-transmitting pattern for relief (11) of the negative film (1) and the semi-light-shielding pattern for base portion (42) surrounding the light-transmitting pattern for mounting portion (43). ) Is formed by irradiating light with a combined circular motion,
The size of the light-transmitting pattern (43) for the mount portion and the semi-light-shielding pattern (42) for the base portion with respect to 1) are constant, and the quality of the masking film (4) is constant.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Film FIG. 8 shows a negative film (1), a semi-light-shielding film (2), and a photosensitive film (3) (raw film) serving as a masking film.
Is shown. The negative film (1) is formed of a lith film and has a light transmitting pattern corresponding to the mark (12) of the printing plate (9).
Portions other than (11) are light-shielding surfaces. Semi-opaque film
(2) is a known halftone dot film in which halftone dots are interspersed in a uniform distribution in the embodiment, but is not limited thereto, and may be a film having a uniform semi-light-shielding property due to coloring or the like. The photosensitive film (3) is a positive film called a deep film.
This is a reversal lith film that can be repeatedly subjected to a positive, negative to negative repetition operation in one step, and has a property of allowing light to pass through light by irradiation and development. FIG. 10 shows the completed masking film (4), and a light-transmitting pattern (43) for a mounting portion having a size surrounding the contour of the light-transmitting pattern (11) of the negative film (1) with a constant width. A semi-light-shielding pattern for base portion (42) surrounding the outside of the light-transmitting pattern for mount portion (43) with a constant width is formed, and the light-shielding portion (41) is formed outside the semi-light-shielding pattern (42). Has become. The masking film (4) is a single film having no step on the surface.

[0011] The masking film manufacturing apparatus Figure 1 shows a masking film production apparatus (5),
Synthetic circular motion device that swings the film on the platform (51) by the combined circular motion on one end of the film platform (51)
(6) is provided, and a lamp (53) is provided so as to be adjustable in height. As shown in FIG. 9, a large number of suction holes (5
2) is regularly opened, and the inside of the mounting table (51) is a suction housing, so that the film placed in contact with the mounting table (51) can be fixed by suction. As shown in FIG. 2, the synthetic circular motion device (6) is connected to the cylinder devices (62) and (62) and can be raised and lowered at a fixed position.
1) A first base plate (63) is provided on the first base plate (63) so as to be slidable in an X direction and a Y direction orthogonal to the X direction in a plane parallel to the mounting table (51). Above, a second base plate (72) is provided so as to be slidable in the X and Y directions. Second
A film holding portion (74) that holds the ends of the negative film (1) and the semi-light-shielding film (2) by the base plate (72) and the magnet plate (75) that is attracted to the second base plate (72). ).

An X-direction slide member (65) is provided on the upper surface of the lifting / lowering plate (61) and guided by a roller (64), and Y-direction guide members (66) () are provided at both ends of the X-direction slide member (65). 66) is provided. A roller (67) for guiding the Y-direction guide member (66) is provided on a lower surface of the first base plate (63). An X-direction slide member (68) is provided on the upper surface of the first base plate (63) and guided by a roller (69), and Y-direction guide members (71) (71) are provided at both ends of the X-direction slide member (68). ) Is provided. A first base plate (63) is provided on the lower surface of the second base plate (72).
A roller (73) for guiding the upper Y-direction guide member (71) is provided. A first base plate (63) is provided at one end of the lifting plate (61).
Is provided with a first circular motion driving device (200) for making a circular motion in the X direction and the Y direction.

First circular motion driving device (200) The first circular motion driving device (200) comprises a rotary shaft (220) of a motor (210) suspended and supported by a lifting plate (61). As shown in FIG. 3, the head portion (23
0) is provided. An eccentric hole (240) is opened in the head part (230), and the eccentric hole (240) is connected to the rotating shaft (220) through a bearing (250).
A cap (260) is attached so as to be rotatable regardless of the rotation of. Mounting hole (270) at eccentric position on top of cap (260)
Is opened, and a protruding piece (201) is provided on the peripheral surface. The head part (230) has a first contact piece which hits the protruding piece (201) of the cap (260) by the counterclockwise rotation of the head part (230).
(280) and the second that hits the protruding piece (201) by clockwise rotation.
A contact piece (290) is protruded. As shown in FIG.
When the contact piece (280) pushes the protruding piece (201) of the cap (260) and rotates counterclockwise, the rotation center P1 of the head part (230)
In contrast, the center P2 of the mounting hole (270) on the cap (260) is at an eccentric position. As shown in FIG. 5, when the second contact piece (290) rotates clockwise by pushing the protruding piece (201) of the cap (260), the rotation center P1 of the head part (230) and the mounting on the cap (260) are set. The center P2 of the hole (270) is at the same position. The pivot (202) rotatably penetrates the first base plate (63) and the cap (26).
0) into the mounting hole (270) of the first circular motion driving device (200).
And the first base plate (63) are connected. A second circular motion driving device (300) is connected to an end of the first base plate (63).

Second circular motion driving device (300) The second circular motion driving device (300) comprises a first base plate (63) for rotating a shaft (320) of a motor (310) suspended and supported by a first base plate.
(63) is freely penetrated, and as shown in FIG.
A disk (330) protrudes. Large gear (340) on disk (330)
And the small gear (350) are meshed with each other and freely rotatable. The small gear (350) is fixed on the first gear (360) on the first base plate (63).
Mesh. A disc-shaped cover plate (370) is screwed and fixed on the large gear (340), and a mounting hole (380) at an eccentric position of the cover plate (370) is opened. As shown in FIG. 7, by the rotation of the rotation shaft (320),
The large gear (340) revolves while drawing a circular locus C1 having a radius equal to the amount of eccentricity with the rotating shaft (320) while rotating, and the mounting hole (380) for the cover plate (370) on the large gear (340). Is the gear (34) of the mounting hole (380).
Revolve around a circular locus C2 whose radius is the amount of eccentricity with respect to 0). A pivot (30) that rotatably penetrates the second base plate (72)
1) fits into the mounting hole (380) of the lid plate (370), and the second base plate
(72) and the second circular motion driving device (300) are connected.

Manufacturing method of masking film (4) [Formation of semi-light-shielding pattern (42) for base portion] As shown in FIGS. 8 and 9, the mounting table (5) of the masking film manufacturing apparatus (5) is used.
1) Place the photosensitive film (3) on the top and fix it by suction. A semi-light-shielding film (2) is placed on the photosensitive film (3), and a negative film (1) is further placed thereon. The negative film (1) may be placed first, and the semi-light-shielding film (2) may be placed thereon.
Place the ends of the semi-light-shielding film (2) and the negative film (1) on the second base plate (72) of the synthetic circular motion device (6).
Hold by 5). The first circular motion driving device (200) and the second circular motion driving device (300) are rotated forward to irradiate the light of the lamp (53) onto the film. As shown in FIG. 4, the mounting hole (270) of the cap (260) of the first circular motion driving device (200) rotates eccentrically with respect to the center P1 of the motor rotation shaft (220). Therefore, the first base plate (63) performs a circular motion combining the X direction and the Y direction. On the first base plate (63), the second base plate (7
2) a circular motion of the first base plate (63), a circular motion describing a circular locus C1 having a radius of eccentricity between the rotating shaft (320) and the large gear (340), and a large gear (340). A circular motion that combines a circular motion that draws a circular locus C2 with the radius of the eccentricity of the cover plate (370) and the mounting hole (380) is performed. The negative film (1) and the semi-light-shielding film (2) supported by the second base plate (72) are
The same circular motion as that of (72) is performed, and during that time, the photosensitive film (3) is irradiated with light via the light-transmitting pattern (11) of the negative film (1) and the semi-light-shielding film (2), whereby In (3), a semi-light-shielding pattern (42) is formed such that the light-transmitting pattern (11) of the negative film (1) is enlarged as a whole.

[Formation of Transparent Pattern (43) for Mount Section] Next, only the semi-light-shielding film (2) is removed from the synthetic circular motion device (6), and the first circular motion drive device (200) is reversely rotated. (The head part 230 is rotated clockwise), the second circular motion driving device 300 rotates forward in the same manner as described above, and the light of the lamp 53 is applied to the film. As shown in FIG. 5, the first circular motion driving device (20
The center P2 of the mounting hole (270) of the cap (260) coincides with the center P1 of the motor rotation shaft (220). Therefore, the first base plate
(63) remains stationary in place. First base plate (63)
Above, the second base plate (72) is composed of a rotating shaft (320) and a large gear (340).
And a circular motion that draws a circular locus C1 having a radius equal to the eccentricity of the large gear (340) and the mounting hole (380) of the cover plate (370). Perform a circular motion composed of As the first base plate (63) is stopped, the second base plate
The range of the resultant circular motion of (72) becomes smaller. Negative film
(1) performs a synthetic circular motion together with the second base plate (72),
In the meantime, the light that has passed through the light-transmitting pattern (11) of the negative film (1) is applied to the photosensitive film (3), so that the semi-light-shielding pattern (42) of the photosensitive film (3) has the pattern ( A light transmitting pattern (43) having a contour passing between the light transmitting pattern (11) and the light transmitting pattern (11) is formed, and the masking film (4) is completed.

In the embodiment, the light transmitting pattern (43) for the mounting portion is about 5 times smaller than the light transmitting pattern (11) of the negative film (1).
mm width, the semi-light-shielding pattern for base (42)
It is 10 mm wider than the translucent pattern (43) for the mount. Accordingly, the swing width of the film by the first circular motion driving device (200) and the second circular motion driving device (300) is determined as such. First circular motion drive (200) and second
It is possible to adjust the swing width of the circular motion driving device (300). In the first circular motion driving device (200), as shown in FIG. 3, around the eccentric hole (240) of the head portion (230). In addition, one or more small holes (203) are opened, the first contact piece (280), the second
The swing width of the first base plate (63) can be changed by inserting the contact piece (290) into a plug-in type and replacing it with a desired small hole (203). In the second circular motion driving device (300), a plurality of mounting holes (38) having different eccentric distances with respect to the rotation center P4 of the cover plate (370).
0) (only one in the drawing) may be opened, and the mounting pivot (301) of the second base plate (72) may be changed.

[0018] As shown in process 11 of the plate, a negative film on a transparent table (8)
(1) and the transparent film (81) are mounted, a weir (83) is provided on the transparent film (81), and the photocurable resin liquid (90) is poured into the weir (83). Transparent base film (82) in photocurable resin liquid (90)
And the masking film (4). table
Lamp below (8) and above masking film (4)
The light of (84) is irradiated. The photo-curable resin liquid (90) is used for the light-transmitting pattern (11) of the negative film (1) and the masking film (4).
The part corresponding to the light-transmitting pattern (11) of the negative film (1) is cured according to the light-transmitting pattern (43) and the semi-light-shielding pattern (42), and the relief portion (12) representing the mark (12) is formed. 92), the portion corresponding to the light-transmitting pattern (43) is a mount portion (93) for reinforcing the relief portion (92), and the portion corresponding to the semi-light-shielding pattern (42) is a thin base portion (94). Becomes With the transparent base film (82) and the base portion (94) adhered, the excess photocurable resin liquid (90) is washed away, and the transparent base film (82)
Is cut into a suitable size and adhered to the mounting film (95).

In carrying out the method of the present invention, a transparent mounting table (5
1) A negative film (1) and a semi-light-shielding film (2) are fixed thereon, and a first circular motion driving device (200) and a second circular motion driving device (30) are fixed.
0), the photosensitive film (3) is irradiated with light from below the mounting table (51) while moving in a synthetic circular motion to form a semi-light-shielding pattern (42) for the base portion on the photosensitive film (3). Remove the semi-light-shielding film (2) and place only the negative film (1).
(51), and the photosensitive film (3) is driven by a second circular motion driving device.
By performing a synthetic circular motion by (300), a light-transmitting pattern (43) for a mount portion is formed on the photosensitive film (3), whereby a masking film (4) can be completed.

In practicing the present invention, a first circular motion driving device (200) for circular motion of the first base plate (63) and a second base plate (72).
The second circular motion drive device (300) for circular motion may be replaced. Also, a light-transmitting pattern for the mounting part is formed on the photosensitive film
In the step of forming (43), instead of stopping the circular motion function of the first circular motion drive device (200), the second circular motion drive device (30) is formed.
The circular motion function of 0) may be stopped.

As described above, the masking film of the present invention
Since (4) is a single sheet, it is easy to handle and is not bulky. Since there is no step on the surface of the masking film (4), it is easy to wipe off dust. Since the masking film (4) can be formed by exposing a required portion of the photosensitive film (3) to light, it is thinner and easier to handle than a conventional three-layer masking film, and can be produced at low cost. For the production of the masking film (4), a negative film (1) and a semi-light-shielding film (2) are necessary in addition to the photosensitive film (3). 92) is originally necessary to form the masking film (2), and since the semi-light-shielding film (2) can be used repeatedly, no specially processed film is required to form the masking film (4).
Also, there is no need to perform any special manual processing. The light-transmitting pattern for mounting portion (43) having a larger outline than the light-transmitting pattern for relief (11) of the negative film (1) and the semi-light-shielding pattern for base portion (42) surrounding the light-transmitting pattern for mounting portion (43). ) Is formed by irradiating light with a combined circular motion, so that the size of the light-transmitting pattern for mount portion (43) and the semi-light-shielding pattern for base portion (42) with respect to the light-transmitting pattern (11) are constant. The quality of the masking film (4) is constant. The present invention is not limited to the configuration of the above embodiment,
Various modifications are possible within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a masking film manufacturing apparatus.

FIG. 2 is a perspective view of the synthetic circular exercise device.

FIG. 3 is an exploded perspective view of the first circular motion driving device.

FIG. 4 is a plan view showing a positional relationship of a head cap in a state where the function of the first circular motion drive device is stopped.

FIG. 5 is a plan view showing a positional relationship between a head portion and a cap in a state where the first circular motion driving device is functioning.

FIG. 6 is an exploded perspective view of the second circular motion drive device.

FIG. 7 is an explanatory diagram of a combined circular motion of the second circular motion drive device.

FIG. 8 is a perspective view of a negative film, a semi-light-shielding film, and a photosensitive film.

FIG. 9 is a cross-sectional view of a state where three films are set on a mounting table.

FIG. 10 is a perspective view of a masking film of the present invention.

FIG. 11 is an explanatory diagram of a printing plate manufacturing method using the above masking film.

FIG. 12 is a perspective view of a printing plate.

FIG. 13 is a perspective view of a conventional negative film and masking film.

FIG. 14 is an explanatory diagram of a method of manufacturing a printing plate using the above masking film.

[Explanation of symbols]

 (1) Negative film (11) Light-transmitting pattern (2) Semi-light-shielding film (3) Photosensitive film (4) Masking film (41) Light-shielding part (42) Semi-light-shielding pattern (43) Light-transmitting pattern (5) Manufacturing of masking film Device (6) Synthetic circular motion device (63) First base plate (72) Second base plate (200) First circular motion drive device (300) Second circular motion drive device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03F 1/06

Claims (4)

(57) [Claims] 1. A semi-light-shielding pattern (42) having a substantially constant width surrounding a light-transmitting pattern (43), and a light-shielding portion (41) outside the semi-light-shielding pattern (42). A single-layer masking film with no steps on the surface. 2. A light-transmitting pattern (1)
The negative film (1) formed with 1) and the semi-light-shielding film (2) are overlapped, the photosensitive film (3) is overlapped on one of the films, and light is irradiated from the opposite side of the photosensitive film (3). ,
A set of a negative film (1) and a semi-light-shielding film (2),
The photosensitive film (3) is relatively displaced by a circular motion to form a semi-light-shielding pattern (42) on the photosensitive film (3) larger than the light-transmitting pattern (11) of the negative film (1). The semi-light-shielding film (2) is removed, and the negative film (1) and the photosensitive film (3) are moved relative to each other by a relative circular motion smaller than the circular motion.
2) A method for producing a masking film, wherein a light-transmitting pattern (43) smaller than the pattern and larger than the light-transmitting pattern (11) of the negative film (1) is formed. 3. The method for producing a masking film according to claim 2, wherein the semi-light-shielding film (2) is a halftone dot film. 4. A film mounting table (51), a synthetic circular motion device (6) for supporting a film to be mounted on the mounting table (51), and performing a synthetic circular motion on the film on the mounting table. (Five
1) A synthetic circular motion device (6) constituted by a lamp (53) for irradiating the upper film, and a first base plate (63) circularly moving in a plane parallel to the mounting table (51); First base plate (63)
A second base plate (72) that makes a circular motion independently of the circular motion of the base plate, a film mounting portion (74) provided on the second base plate (72), and a first base plate (63 ) And a second circular motion driving device (200) connected to the second base plate (72).
The first circular motion driving device comprising a circular motion driving device (300)
(200) and the second circular motion driving device (300), wherein the circular motion driving device can temporarily stop the function of the circular motion if necessary. .