JPS607399B2 - automatic screen printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic screen printing machine for producing thick film integrated circuits and the like.

The prior art will be explained with reference to FIGS. 1, 2, and 3.

Fig. 1 is a schematic side view of a manual and semi-automatic screen printing machine, Fig. 2 is a schematic cross-sectional view of an automatic screen printing machine equipped with a conveyance link that intermittently feeds the printing material in a rectangular motion, and Fig. 3 2 is a schematic plan view of the stage in FIG. 2. FIG. In Figs. 1, 2, and 3, 1 is a printing material such as a ceramic substrate, 2 and 2' are stages for mounting and fixing the printing material 1, 3 is a plate (mask), and 4 is a printing material 1
5 is a cylinder that moves the stage 2' up and down. In the manual and semi-automatic systems shown in FIG. 1, the substrate 1 is placed on the stage 2 at a position away from the plate 3 and indicated by the dotted line in FIG. Move to the position shown by the solid line in Figure 1, put the paste (ink) into the plate (printing mask) 3 that has been blanked out, leaving only the necessary areas for screen printing, and use a squeegee to The paste (ink) is forced through the holes of the pattern by sliding pressure on the back side of the plate with a spatula-like tool called a spatula, resulting in screen printing. However, in this direct moving type of stage 2, automatic loading and unloading of the printing material 1 is difficult, and the working speed is slow, so it cannot be fully automated.

Furthermore, when the printing material 1 is fed into the printing machine from the fixed transport link 9 by rectangular movement of the transport link 4 as shown by the arrow in FIG. The printed material 1 cannot be transported.
Also, in order for this transport link 4 to move in a rectangular manner, the stage 2
When conveying the printing material 1 placed on the stage 2', the printing material 1 comes out above the surface of the stage 2', and after separating the printing material 1 from the stage 2',
Make a forward movement. Therefore, unlike the manual or semi-automatic type shown in Fig. 1, there must be a gap between the plate 3 and the stage 2' on which the substrate 1 is placed, by the amount of the rise of the conveyor plate 4, and when screen printing is cylinder 5 for that gap.
As a result, stage 2' is raised. Further, due to the rigidity of the transport link 4, the transport link 4 does not have a sufficient length in the height direction, and the stage 2' is divided into three by the rails of the two transport links 4. If you raise it while dividing it into three parts, the third
As shown in the figure, a groove is formed on the stage 2' only in the rail, and the groove causes uneven pressurized sliding by the stage during screen printing, resulting in poor printing accuracy and plate 3.
The disadvantage was that the lifespan was significantly shortened. The purpose of the present invention is to eliminate the drawbacks of the prior art described above, improve printing accuracy,
Another object of the present invention is to provide an automatic screen printing machine that can maintain the life of the plate for a long time.

That is, the present invention is to provide a protection plate between the stage and the plate, which is pushed up following the rise of the stage, and which has a hole through which at least the printing material can be inserted. The present invention will be specifically explained below based on embodiments shown in the drawings.

FIG. 5 is a schematic cross-sectional view showing an embodiment of the present invention when the stage on which the printing material is placed is lowered;
The figure is a schematic cross-sectional view showing the state when the stage on which the printing material is placed is raised, and FIG. 7 is a schematic plan view seen from the protection plate side.

In Figures 5, 6, and 7, 1 is the printing material, 2''
3 is a stage, 3 is a plate, 4 is a transport link, 5 is a cylinder, and 6 is the size of the middle of the stage 2'' divided into three parts, and has a hole into which the printing medium 1 can be inserted, and a guide. 1
0, a protection plate is moved downward by a spring 11, 7 is a push rod, and 8 is a gap adjustment nut. As shown in FIG. 4, the conveyance of the printing material 1 is carried out by the rectangular movement of the conveyance link 4, which moves upward, forward, downward, and backward, as in the prior art. In the case of screen printing, the stage 2'' is raised by the cylinder 5 as shown in FIG.
The object to be printed 1 and the surface of the protection plate 6 become flat. In order to perform high-precision printing, the height of the stage 2'' is adjusted using a gap adjustment nut 8 that adjusts the gap between the plate 3 and one side of the printing material, but the protection plate 6 is integrated with the stage 2''. Since the mechanism is such that it is pushed up by the push rod 7, it can accurately follow this height adjustment. Further, the parallelism between the plate 3 and the protection plate 6 can be easily adjusted by making the ridges 7 screw type. By the way, since the thickness of the substrate 1 is thin, in order to provide rigidity, the thickness of the protection plate 6 is made thicker than that of the substrate 1, and the holes drilled in the protection plate 6 are also connected to the stage 2 as in the above embodiment. ``I'm trying to get away from the size of it.''

However, if the transport link 4 has good conveyance accuracy for the printing material 1, the size of the printing material 1 on the stage 2'' in the transport direction can be made to almost match the size of the printing material 1.
The size of the holes drilled in the protection plate 6 and the size of the printing medium 1 can be made almost the same. As explained above, according to the present invention, the accuracy of screen printing can be improved and the life of the plate can be considerably lengthened.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of a conventional manual and semi-automatic screen printing machine, and Fig. 2 is a schematic side view of a secondary screen printing machine equipped with a conveyance link that intermittently feeds the printing material in a rectangular motion. 3 is a schematic plan view of the stage shown in FIG. 2, FIG. 4 is a schematic front view of the stage shown in FIG. 2, and FIG. 5 shows an embodiment of the screen printing machine of the present invention. FIG. 6 is a schematic side view showing a state in which the stage on which the printing material was printed is raised in the screen printing machine of FIG. 5, and FIG.
The figure is a schematic plan view of FIGS. 5 and 6 viewed from the protection plate side. Explanation of symbols, 1... Printing material, 2''... Stage, 3.
... Plate, 4... Transport link, 6... Protective plate, 7...
・Pushing, 10...Guide, 11...Spring. Spear' figure 2 figure spear 3 figure O 4 figure O S figure spear figure O 7 figure

Claims (1)

[Claims] 1 The printing material is placed on a stage for fixing the printing material by means of a conveying link that performs rectangular movement, and then the stage on which the printing material is placed rises until it is at a certain distance from the plate, and then screen printing is performed. After printing, the stage is lowered to the initial position and the printed matter is ejected from the stage again by the transport link.In an automatic screen printing machine, a hole is bored in the intermediate part between the stage and the plate, into which at least the material to be printed is inserted. A protective plate is provided, and when the stage is raised, the protective plate is pushed up by a push-up member provided integrally below the stage and the transport link and extending to the outside of the transport link. An automatic screen printing machine characterized in that it moves up following a stage so that the printing material and the protective plate surface become flat during screen printing.