JPH0755063Y2 - Fixing device for printed material in screen printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for fixing an object to be printed in a screen printing machine.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, in a fixing device for an object to be printed in a screen printing machine, a printing platen 30 for placing an object to be printed A as shown in FIGS. It is provided with a cavity 31 inside, and a large number of suction holes 32 are formed on almost the entire upper wall 30a of the printing platen 30. Printing surface plate
When the material to be printed A is placed on 30 and air is sucked into the cavity 31 by the vacuum pump 33, the material to be printed A is suctioned and fixed on the printing platen 30 through the suction holes 32.

However, if the printed material A has a large number of holes 17 like a through-hole substrate, the printed material A is printed on the printing platen.
When placed on 30, the holes 17 and the suction holes 32 may overlap with each other, which causes a problem that ink is sucked into the cavity 31 during printing. Therefore, when fixing the through-hole substrate A by adsorption, the holes 17 of the through-hole substrate A were previously filled with the filler. However, this filling work required a great deal of work.

On the other hand, when the through-hole substrate A is not fixed by suction, a positioning hole is provided at the end of the through-hole substrate A.
The through-hole substrate A is positioned and fixed by forming three to three pins, raising pins on the printing platen 1 in accordance with the holes, and inserting the pins into the holes. Further, one end of the through-hole substrate A may be pressed by the positioning and fixing claw to fix the through-hole substrate A.

However, in any case of using the pin or the positioning and fixing claw, if the size of the through-hole substrate A changes, it is necessary to change the position of the pin or the claw, and this work takes time and hinders automation of positioning. Was there.

Therefore, it is an object of the present invention to provide a device for fixing a material to be printed in a screen printing machine that can be easily fixed on a printing platen even when printing on a material having through holes.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a cavity is provided in a printing platen having a flat upper wall on which an object to be printed can be placed, and The partition wall divides the through-hole substrate dedicated adsorption chamber located at one end in the cavity into another adsorption chamber, and the other adsorption chamber, and the upper wall has a hole in the printed material at a portion corresponding to the through-hole substrate dedicated adsorption chamber. A suction hole for exclusive use of a through-hole substrate, which can adsorb one end that is not formed, is provided through, and another adsorption hole is provided at a site corresponding to another adsorption chamber, and a single suction hole is provided for each adsorption chamber. The gist of the invention is that the suction means is commonly used, and a suction stop valve is provided between the other suction chamber and the suction means.

[Operation] In the device for fixing a printed material in the screen printing machine of the present invention, at the time of printing, first, the printed material is placed on the printing platen, and the air in each suction chamber is sucked by the suction means so that the printed material is It is fixed on the printing platen through the suction holes. At this time, in the case where the material to be printed has holes formed therein, such as a through-hole substrate, the suction stop valve is closed to suck only the through-hole substrate dedicated suction chamber.

[Embodiment] A screen printing machine equipped with a device for fixing an object to be printed according to an embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the printing platen 1 is a flat square-shaped table with a flat front surface. The printing substrate A is placed on the upper wall 1a of the printing platen 1. There is. Printing surface plate 1
The inside of the cavity is a cavity N, and the front end portion of the cavity N (the first
A partition wall 2 that divides the inside of the cavity N into two front and rear is provided at the left end portion in FIGS. Cavity N on the front side of the partition wall 2
Is the adsorption chamber 3 dedicated to the through hole substrate, and the cavity N on the rear side of the partition wall 2 is another adsorption chamber 4. Upper wall of printing surface plate 1
In the portion of 1a located above the adsorption chamber 3 for exclusive use of the through-hole substrate, the adsorption holes 6 for exclusive use of the through-hole substrate are arranged in a line in the left-right direction (vertical direction in FIG. 2). In the portion of the upper wall 1a of the printing platen 1 which is located above the other suction chamber 4, another suction hole 5 is provided almost all over.

Below the printing platen 1, a suction vacuum pump P as suction means is provided. An air hose 7 is connected between the vacuum pump P and the through-hole substrate dedicated adsorption chamber 3, and an adsorption opening / closing valve 8 is provided in the air hose 7. An air hose 9 is connected between the suction hose 7 and the suction chamber 4 on the suction hole 3 side dedicated to the through hole substrate from the suction opening / closing valve 8, and a suction stop valve 10 is provided in the air hose 9.

A screen plate 12 stretched over a screen plate frame 11 is provided above the printing platen 1. In addition, 13 is a printing squeegee, 14 is an ink return doctor, and 15 is a printed circuit board positioning claw.

Now, in order to print on the through-hole substrate A as an object to be printed using the screen printing machine configured as described above,
First, the through-hole substrate A is placed on the printing platen 1 and positioned in accordance with the positioning claw 15. At this time, the through-hole substrate A has one end portion 18 where the hole 17 is not formed is located on the through-hole substrate-dedicated adsorption hole 6. The screen plate 12 rises together with the squeegee 13 and the ink return doctor 14.

Next, the screen plate 12 is positioned in accordance with the positioned through-hole substrate A.

Then, the suction opening / closing valve 8 is opened, and the suction stopping valve 10 is closed to suck the air in the through-hole substrate dedicated suction chamber 3. Therefore, the through-hole substrate A is suction-fixed onto the printing platen 1 through the through-hole substrate-specific suction holes 6.

In this state, the screen plate 12 descends, then the squeegee 13
Drops on the screen plate 12 and moves in the direction of the arrow X (FIG. 1), and printing is performed while applying pressure to spread the ink 16 on the screen plate 12. At this time, the ink return doctor 14 rises and is located on the rear end side (the right end side in FIG. 1) of the screen plate 12.

After printing, the squeegee 13 rises, the doctor 14 descends, the doctor 14 moves on the screen plate 12 in the direction of the anti-X arrow, and the remaining ink 16 is returned to the printing start point side and the screen plate 12 The ink remaining inside is transferred onto the through-hole substrate A.

After that, the suction opening / closing valve 8 is closed to stop the suction of the through-hole substrate A.

As described above, by using the screen printing machine provided with the fixing device for the printed material of the present embodiment, the printed material has a through hole substrate A having a large number of holes 17 at unspecified positions as shown in FIG.
Even in this case, it is possible to adsorb only the one end portion 18 in which the hole 17 is not formed. Therefore, even if the hole 17 of the through-hole substrate A and the other suction hole 5 of the printing platen 1 may overlap with each other, suction of the overlapped portion can be stopped,
Unlike the prior art, ink will not be sucked into the other suction chamber 4 of the printing platen 1. For this reason,
It does not take time and trouble to fill the holes 17 before printing and to restore the filled holes 17 after printing.

Further, since the through-hole substrate A itself has a fixed shape, it can be securely fixed onto the printing platen 1 by sucking only one end 18 thereof.

Furthermore, regardless of the size of the through-hole substrate A, the through-hole substrate can be easily aligned. Moreover, since the suction vacuum pump P for sucking air is shared by the suction chambers 3 and 4, the production cost can be reduced.

Therefore, the position of the through-hole substrate A does not move during printing, and the productivity can be improved.

In addition, when printing on a printing material having no holes formed using a screen printing machine equipped with the fixing device of the present embodiment, the suction stop valve 10 and the suction opening / closing valve 8 are opened,
By sucking the air in the through-hole substrate dedicated suction chamber 3 and the other suction chamber 4 together by the suction vacuum pump P, the through-hole dedicated suction holes 6 and the other suction holes 5 can be applied to the print object having no holes. It is possible to more securely suction and fix it.

[Effect of device]

As described in detail above, according to the present invention, it is possible to easily suck and fix the printing material on the printing platen regardless of its shape and size, so that it is possible to easily cope with printing of a large variety of small lots. Also, the production cost can be reduced by sharing the suction means for each suction chamber, and further, even when the print object has a hole such as a through hole substrate, by closing the suction valve, There is an effect that one end of the through-hole substrate where no hole is formed can be adsorbed by the through-hole substrate dedicated adsorption hole, and the through-hole substrate can be reliably attracted and fixed onto the printing platen.

[Brief description of drawings]

FIGS. 1 and 2 show a screen printing machine equipped with a device for fixing an object to be printed, which is one embodiment of the present invention. FIG. 1 is a schematic sectional view of the screen printing machine, and FIG. 2 is the screen printing machine. Fig. 3 is a plan view showing a printing platen of Fig. 3, Fig. 3 is a plan view showing a through-hole substrate, Figs. 4 and 5 show a conventional screen printing machine, and Fig. 4 is a schematic sectional view of the screen printing machine. The figure is a plan view showing a printing platen of the screen printing machine. Printing surface plate 1, upper wall 1a, partition wall 2, through-hole substrate dedicated suction chamber 3, other suction chamber 4, other suction hole 5, through-hole substrate dedicated suction hole 6, suction stop valve 10, through-hole substrate (printed material) A, vacuum pump for suction (suction means) P, cavity N.

Claims (1)

[Scope of utility model registration request] 1. A cavity (N) in a printing platen (1) having an upper wall (1a) having a flat upper surface on which a material (A) to be printed can be placed.
And the inside of the cavity (N) is partitioned by the partition wall (2) into a through-hole substrate dedicated adsorption chamber (3) located at one end of the cavity (N) and another adsorption chamber (4). A through hole substrate capable of adsorbing one end (18) of the upper wall (1a) in which a hole (17) of the material to be printed (A) is not formed in a portion corresponding to the through hole substrate dedicated adsorption chamber (3) A dedicated suction hole (6) is provided through, and another suction hole (5) is provided through the site corresponding to the other suction chamber (4).
A single suction means (P) is commonly connected to each of the suction chambers (3, 4), and a suction stop valve is provided between the other suction chamber (4) and the suction means (P). (10) A fixing device for an object to be printed in a screen printing machine, which is provided with (10).