JPH01238666A - Double side printing machine - Google Patents

Abstract

PURPOSE:To accurately print double sides of an original plate by facing a pair of master plates so as to match the patterns of both plates, shifting a pair of photosensitive part material holded by a holder between the master plates and exposing from the outside of each master plates. CONSTITUTION:The master plates 2a and 2b are installed on the holders 42a and 42b respectively so as to permit the effective planes to face inside. Then, the patterns of the master plates 2a and 2b are matched with each other. When both master plates are matched, the master plates 2a and 2b are separated by z-axis drive, and works 50a and 50b which are to be the original plates are delivered to the specific position between the master plates. Then, the master plates 2a and 2b are adhered to the works 50a and 50b respectively by the z-axis drive. The exposure planes of the works 50a and 50b are exposed by projecting light from sources 48a and 48b provided on the outside of each master plates 2a and 2b. Thus, the high precision original plate double side printing is carried out.

Description

Detailed Description of the Invention [Industrial Application Field] This invention is a double-sided printing method in which a pair of original plates for the front and back sides, each printed on multiple sides, are simultaneously printed using a pair of master plates. The present invention relates to a double-sided printing machine, and particularly to a double-sided printing machine for printing original plates used for manufacturing shadow masks, lead frames, and the like.

[Prior Art] In recent years, with the trend toward larger picture tubes and higher image quality, there has been a demand for higher precision shadow mask patterns. The large number of fine holes in the shadow mask pattern are formed so that they are narrower on the electron gun side than on the phosphor screen side by simultaneously machining and sawching both sides of the material in order to improve the accuracy of electron beam passage. That is, master plates with fine patterns with different sizes of light-shielding parts are made individually for the front and back sides, and manuscript plates (practical versions) for the front and back sides are printed using the master plates as originals, and a pair of these is printed. mass-produce shadow masks using the practical version as a manuscript.

In double-sided engraving, it is necessary to accurately match the patterns on the front and back sides, and in recent years, there has been a demand for higher and higher pattern alignment accuracy for the front and back sides of the document.

In particular, in a shadow mask for a large picture tube, it is necessary to keep the tolerance of positional deviation between the front and back sides of the document to several microns or less.

By the way, since the original master plate requires a lot of labor and time to manufacture and is expensive, only one side each for the front side and the back side is manufactured.

Then, using the master plate on which only the - side has been drawn, a plurality of patterns are printed on the - sheet using a multi-sided drawing technique to obtain a multi-sided practical version.

By using this multi-sided practical version as a manuscript, productivity is increased compared to the case of using a -sided version, and the product yield is improved.

Conventional multi-surface drawing techniques include a technique using a master plate drawing machine, a technique using a projection method, and a technique using manual operation.

[Problems to be Solved by the Invention] However, in the technology using a master plate making machine, the drawing area is limited and exposure takes a long time, making it difficult to manufacture large multi-sided manuscript plates at low cost. Can not. In addition, in the technology using the projector method,
The dot diameter varies between the center and the periphery of the pattern, making it impossible to obtain a highly accurate pattern. In addition, manual techniques have the problem that it is difficult to accurately align patterns with each other, resulting in reduced accuracy and reliability.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a double-sided printing machine that can print a pair of front and back multi-sided original plates with high precision and speed.

[Means for Solving the Problems] A double-sided printing machine according to the present invention uses a pair of master plates to print a pair of original plates used to form a predetermined pattern on the front and back sides of a material. In a double-sided printing machine, an aligning means for causing the pair of master plates to face each other so that their patterns match each other, a holder made of an opaque body for holding the pair of photosensitive members to be the original plates facing each other, and this holder. The apparatus is characterized in that it has a moving means for appropriately moving a pair of photosensitive members held by the master plates between the master plates, and an exposing means provided on the outside of each master plate. In this case, it is preferable that the alignment means has drive means for moving the master plate horizontally, vertically, and in rotational directions. Further, it is preferable that the moving means includes a driving means for moving the photosensitive member in a horizontal direction. Furthermore, it is preferable that the holder has vacuum adhesion means, and the photosensitive members are respectively attracted to both surfaces of the holder.

[Function] In the double-sided printing machine according to the present invention, the patterns of the front master plate and the back master plate are matched with each other by the matching means. On the other hand, a pair of photosensitive members are attracted to both surfaces of the holder and inserted between the master plates. Next, the exposure means irradiates each of the pair of photosensitive members with light to print a pattern on each photosensitive member. Next, the photosensitive member is translated in parallel by an accurate predetermined distance, and the same operation is repeated to form a second pattern similar to the above pattern in another area. In this way, by sequentially moving the pair of photosensitive members between the pair of master plates, a multi-sided document plate for the front and back sides is produced.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

As shown in FIG. 1, the double-sided printing machine 10 includes a workpiece conveyance section 11 for holding and conveying a workpiece 50 to be a manuscript plate.
and a main body part 27 for aligning the master version 2 with each other.
It is made up of. The beam 14 of the workpiece conveyance section 11 is 1
A pair of support columns 12 are connected, and a guide bar 16 is provided parallel to the beam 14. A holder 18 is suspended by a pair of sliders 20 so as to slide along the guide bar 16. One slider 2o has a nut 22, which is screwed into a screw 24,
When the screw 24 is rotated by the drive motor 26, the holder 18 is horizontally moved from the standby position toward the main body 27.

The motor 26 has a limit switch, and the Holter 1
8 to be accurately stopped at a predetermined position. Further, a pair of workpieces 5° are attached to both sides of the holder 18 at the standby position.

As shown in FIG. 2, the workpiece conveyance path of the conveyance section 11 is structured to pass through the center of the main body section 27, and is positioned between the workpiece 50 and the pair of master plates 2a and 2b. There is.

The main body part 27 is attached to the support column 1 which is away from the standby position of the holder 18.
2. The head 28 of the main body 27 is fixed on the floor via a vibration damping device (not shown) to prevent vibrations from being transmitted above the bed 28. bed 28
Above the X-axis, Y-axis, two-axis, and C-axis driving means are respectively provided. A pair of convex guides 29 of the main body bed 28 are respectively fitted to the concave sliders 31 of the Z-axis peripheral bed 30, and the bed 30 is moved in two axial directions (perpendicular to the beam 14 in the horizontal plane) by a drive motor 32 at the bottom of the bed. direction). Further, a pair of convex guides 33 of the Z-axis angular bed 30 are connected to the X-axis circumferential bed 34.
are respectively fitted into the concave sliders 35 of the drive motor 3.
6 allows the bed 34 to slide in the X-axis direction (direction parallel to the beam 14 in the horizontal plane). Further, two sets of stands 38 are placed on the X-axis circumferential bed 34, and the stands 38 are moved in the X-axis direction (
It is designed to slide vertically. A frame-shaped holder 42 is provided between each set of stands 38, and each holds a master plate so that the front side and the back side face each other. Further, at least one of the holders 42 is provided with a C-axis drive mechanism (not shown) for adjusting the inclination of the holder 42. Further, solid-state image sensor cameras 44 are provided at the upper and lower parts of the holder 42 via an arm 43 and a shaft 45, and are adapted to move in the Z-axis direction. That is, a pair of cameras 44 with a constant depth of focus capture the master versions 2a and 2b.
The upper and lower register marks are sequentially photographed and recorded, and the alignment of the X-axis, Y-axis, and C-axis of the holder 42 is sequentially adjusted based on the images so that the patterns of the front and back master plates 2a and 2b match each other. It has become.

As shown in FIG. 3, a pair of cameras 44 and a spot light source 46 are respectively arranged so as to sandwich the main body 27 from both sides, and the light source 46 irradiates the marks on the master plates 2a and 2b with spot light to mark the marks. is photographed and recorded by the camera 44. Furthermore, a set of light sources 48a, 48
b are arranged on both sides of the main body part 27, and the master versions 2a, 2
The photosensitive surfaces of the workpieces 50a and 50b are exposed to light through the beams 50a and 50b.

As shown in FIG. 4, the master plate holder 42 has a frame shape with a window 61 so that the master plate 2 is irradiated with light. Holder 42 has an exhaust pipe 62 that communicates with a vacuum pump (not shown). The opening 63 of the tube 62 is formed in a portion where the master plate 2 comes into close contact with the holder 42. Furthermore, the sealing rubber 64 or the attachment of the master plate 2 is provided so as to surround the part. As shown in FIG. 5, the master plate 2 has a predetermined pattern formed on its effective surface 3 by an original printing machine, and has register marks 4 on the outside of the short sides of the effective surface. Note that the master plate 2 is made of glass, and patterns and marks are formed only on one side thereof.

As shown in FIG. 6, the workpiece holder 18 is made by laminating two symmetrically formed parts 465a and 65b. The holder 18 is made of an opaque material, e.g.
It's made of metal plate. A large number of branch passages 67 are formed inside each of the members 65a and 65b. The passage 67 is an exhaust pipe 66 that communicates with a vacuum pump (not shown).
On the other hand, the workpieces 50a and 50b are mounted with openings distributed over the entire surface in a substantially uniform manner.

Next, the operation of this embodiment will be explained with reference to FIG.

Each of the master plates 2a and 2b is attached to the holder 42a and 42b by vacuum sealing so that the effective surface thereof is on the inside. Move the holders 42a and 42b in the Z-axis direction,
Bring the effective surfaces into close contact with each other.

A light source 46 emits a spot light, a camera 44 is focused on the register mark of the master plate 2b, and this is photographed and recorded (stored). Next, the camera 44 is moved backward to focus on the register mark of the master plate 2a, and the motors around the X, Y, and C axes are driven so that the image stored in the previous photographing matches the real image. Adjust the position of plate 2a. When the alignment of both master plates is completed, the camera 44 and the light source 46 are moved to the standby position where the exposure light sources 48a and 48b are not affected by the arm 43. It moves by a shaft 45.

Next, the master plates 2a and 2b are separated by the Z-axis drive, and the works 50a and 50b are carried into a predetermined position between the master plates. The warps 50a and 50b are vacuum-adhered in advance to the holder 18 at the standby position. Note that the work 50a.

One side of 50b is coated with a photosensitive material. Both master plates 2a and 2b are brought into close contact with the works 50a and 50b, respectively, by Z-axis driving. Next, the workpiece 50a is covered with a light-shielding blackout curtain, light-shielding tape, etc. (not shown) in order to prevent the influence of exposure.

50b and remove the window 61 (shading the area. Then,
Light is irradiated by the light sources 48a and 48b, and the workpieces 50a,
The photosensitive surface of 50b is exposed for a predetermined time. After exposure is complete,
Both master plates 2a and 2b are moved to workpiece 50a by Z-axis drive.
, 50b and move the works 50a, 50b a predetermined distance to position the unexposed surfaces of the works 50a, 50b between the master plates. Next, exposure is performed in the same manner as before. Thereafter, by developing this, the workpiece 50 becomes a multi-sided original plate having effective surfaces 51.degree. 52 of the same pattern, as shown in FIG.

According to the above embodiment, since a solid-state image pickup device camera and a driving device for each axis are used, the patterns of the master plates for the front side and the back side can be matched with high precision.

Further, according to the above embodiment, since the master plate and the workpiece are vacuum-adhered to each other, handling is simple and
You can print both sides quickly and reliably.

Note that in the above embodiment, a case was explained in which a multi-sided manuscript plate was manufactured by moving the workpiece only in the horizontal direction.
The work is not limited to this, and the work may also be moved in the vertical direction, and by moving the work in the horizontal and vertical directions, it is also possible to produce a multi-sided manuscript plate with patterns arranged vertically and horizontally.

[Effects of the Invention] According to the present invention, a highly accurate multi-sided manuscript plate can be produced quickly and reliably. Therefore, a multi-sided manuscript plate can be manufactured at low cost, and the product yield can be significantly improved compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a front view of a double-sided printing machine according to an embodiment of the present invention;
Figure 2 is a plan view of the double-sided printing machine, Figure 3 is a schematic diagram of the double-sided printing machine seen from the side, Figure 4 is a longitudinal sectional view showing the holder for the master plate, and Figure 5 is a schematic plan view of the master plate. 6 is a longitudinal sectional view showing a holder for a workpiece, and FIG. 7 is a schematic plan view showing a multi-sided manuscript plate. 2; Master plate, 101 double-sided printing machine, 16; Guide bar, 18; Work holder, 22; Nut, 24; Screw, 26, 32, 36, 39; Motor, 28.30,
34, Bed, 38. Stand, 42. Master version holder, 44: Camera, 46. 48; Light source, 50. Work (photosensitive member), 62.66; Exhaust pipe, 64; Seal rubber. Applicant's representative Patent attorney Takehiko Suzue Figure 4 50 , a 67, -" , -:;=t67 C Figure 5 - fig. 6 fig. 7

Claims (4)

[Claims] (1) In a double-sided printing machine that prints a pair of original plates used to form a predetermined pattern on the front and back sides of a material using a pair of master plates, the pair of master plates are placed facing each other. a matching means for mutually matching both patterns;
a holder made of an opaque body that holds a pair of photosensitive members to be the manuscript plates facing each other; a moving means for appropriately moving the pair of photosensitive members held in the holder between the master plates; and each master plate. 1. A double-sided printing machine, comprising: exposing means provided on the outside of the double-sided printing machine. (2) The double-sided printing machine according to claim 1, wherein the alignment means includes drive means for moving the master plate horizontally, vertically, and in rotational directions. (3) The double-sided printing machine according to claim 1, wherein the moving means has a driving means for horizontally moving the photosensitive member. (4) The double-sided printing machine according to claim 1, wherein the holder has vacuum adhesion means to attract the photosensitive members to both sides of the holder.