JPH0429848A - Printing method - Google Patents

Abstract

PURPOSE:To make intended printing executable with a printer directly on a body to be printed like a printed circuit board an to make such printing applicable to diversified small-lot production by a method wherein the printer that makes printing with ink particles flown to the body to be printed is controlled, based on control signals emitted from a CAD device. CONSTITUTION:A printer 101 is connected to a CAD device 102, and intended printing is made with said printer on a printed circuit board, a body 103 to be printed, with ink flown, based on signals emitted from the CAD device 102. The printed circuit board, the body 103 to be printed, is placed on a carrying surface 16 over a base 6 of a device, and a nozzle 2, a moving means 4 for moving in the X direction, a moving means 3 for moving in the Y direction a turning means 5, and others are controlled, based on control signals from the CAD device 102, and printings of lot numbers, product numbers, figures and others are made on specified positions of the printed circuit board.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printing method for printing loft numbers, product numbers, figures, etc. on a printing medium such as a printed wiring board. It is something.

[Prior art 1] Conventionally, in order to print on a printed wiring board, as explained in FIG. Step 1: Original drawing (c) where this is photographed and the original image is created.
It required five stages: step (2) to create a silk screen based on the original drawing, and then printing (e) to perform silk printing on a printed wiring board.

[Problem to be solved by the invention] However, in the conventional example, as mentioned above, printing on a printed wiring board requires five steps of work, which is troublesome and costly. In particular, a wide variety of products,
In low-volume production, the complexity of the work and the high cost become more of a problem.

The present invention was invented in view of the above problems, and
The purpose is CADi! To provide a printing method capable of directly printing a desired character on a printing object such as a printed wiring board using a printing device connected to a position C, and capable of responding to high-mix, low-volume production.

[Means for Solving the Problems] The printing method of the present invention includes controlling a printing device 101 that prints by causing ink particles 100 to fly and reach a printing target 103 based on a control signal output from a CAD device 102. By employing such a configuration, the above-mentioned object of the present invention can be achieved.

[Function] Therefore, the ink particles 100 are
The target printing is performed on the printing medium 103 by flying the
This is what we do.

[Example 1] The present invention will be described in detail below based on an example shown in the accompanying drawings.

FIG. 1 and FIG. 2 respectively show a front view and a side view showing the entire apparatus of the present invention. A rail 7 in the X direction is provided on the base 6, and a rail 8 in the X direction is attached to the rail 7 in the X direction so as to be movable in the X direction. M101 nozzle 2 is X
It is attached so that it can be moved in any direction. Here, the X-direction rail 7 and the X-direction rail 7 intersect at right angles in plan view. The X-direction moving means 3 is constituted by the X-direction rail 7', the X-direction rail 8 attached to the X-direction rail 8 so as to be movable back and forth, and this moving mechanism.
direction rail 8 and nozzle 2 movably attached to it
This moving mechanism constitutes a moving means 4 in the X direction. The nozzle 2 may be freely rotatable in a plan view by a rotating means 5 such as a motor, an air cylinder, or the like. Here, although the rotation angle is arbitrary, for example, the rotation angle is 90° or 180°.

The printing device 101 is connected to a CAD device 102 as shown in FIG.
The ink is connected to the CAD device 102 to spray ink based on a control signal from the CAD device 102 to print on a printed wiring board, which is a printing medium 103.

Here, a printing device 1 for printing by flying ink
For example, an inkjet printer is used as the printer 01. Inkjet printers are conventionally well-known inkjet printers (for example, what is called a charge control type).
is used. This charge control type divides the characters to be marked into pixels into a Todd matrix, and applies a voltage proportional to the positional information of each pixel to generate 100 ink particles.
A pixel character (a character composed of tods) is marked by charging it and deflecting it using an electrostatic field so that it reaches the object to be marked (that is, a printed wiring board in the present invention). FIG. 3 shows a diagram of the principle of this inkjet printer, in which the ink stored in the ink container 15 is pressurized by the pump 10 and is ejected from the nozzle 2 (nozzle nozzle) in the form of a liquid column. ing. Then, the liquid column ejected from the nozzle 2 becomes ink particles 100 of a constant size due to the vibration of the electrostrictive element 11, and each ink particle 100 is charged by the charging electrode 12 with a voltage corresponding to the signal voltage. When the charged ink particles 100 pass between the deflection electrodes 13, they are deflected according to the amount of charge, and
The ink particles 100 that reach the printed wiring board and are not used for printing are captured by the tar 14 as shown by the arrow in FIG. 3, and collected by the collection pump 17 into the ink container 15. .

Therefore, in order to print on the printing medium 103 using the above-mentioned device, seven steps are required: controlling the slider 2, moving means 3 in the X direction,
A CAD system for the CAD device 102 that controls the moving means 4 and the rotating means 5 in the X direction is designed, and the CAD system 10
Based on the control signal No. 2, a desired mark (printing) is performed on a printed wiring board, which is a printing object 103. That is, a printed wiring board, which is the object to be printed 103, is placed on the mounting surface 16 on the upper surface of the base 6 of the device, and an ink sheet is placed at a predetermined position on the printed wiring board based on the control signal of the CAD device 102. The nozzle 2, moving means 4 in the X direction, moving means 3 in the X direction, rotating means 5, etc. of the printer are controlled to print loft numbers, product numbers, figures, etc.

Incidentally, FIG. 4 shows an explanatory diagram when a piezo element 13g is used as the electrostrictive cable 13 in the inkjet printer. The ink is in the nozzle 2 under pressure (1~
10kg/cm2)
A piezo element, which is an electrostrictive element 13, is installed inside the nozzle 2, and the nozzle opening 2b is opened and closed by high-speed vibration (several hundred Hz to several tens of KHz) of the piezo element. Ink particles 100 of a certain size are ejected from the ink droplets. Although the piezo element 13a is used in the above embodiment, a solenoid valve may be used to open and close the nozzle port 2b.

FIG. 6 shows another embodiment of the invention.

In this embodiment, an example is shown in which the table 20 is movable in the X direction by a moving means 21 in the X direction and also movable by a moving means 22 in the X direction. That is, in this embodiment, the upper moving body 24
is a means of movement in the X direction such as a light servo motor with an encoder 2
2, it can move freely in the X direction, and the upward movement movement 2
4, it is movable in the X direction by an X direction moving means 21 such as a servo motor with an encoder.

Therefore, in this embodiment, the control of the nozzle 2, the X-direction moving means 21 for moving the table 20 on which the printed wiring board, which is the printing target 103, is placed and set, in the X direction, and the X-direction moving means 22 are carried out. Under control based on control signals from the CAD device 102, a printed wiring board, which is a printing target 103, is placed on a table 20 and printed while moving in the X direction and the X direction.

FIG. 7 shows yet another embodiment of the invention. In this embodiment, the nozzles 2 of the inkjet printer are multi-nozzles, and ink particles 100 are flown from each of the plurality of nozzles 2 to print on a printed wiring board, which is a printing medium 103. . In this case, it is convenient to print multiple lines on the top and bottom at the same time.

[Effects of the Invention] As described above, in the present invention, a printing device that prints by causing ink particles to fly and reach a printing target is manufactured using CAD.
Since the control is based on the control signal output from the device, the printing device connected to the CAD device can directly print the desired markings on the printing target such as a printed wiring board, which has the advantage of being able to handle high-mix, low-volume production. There is. And CAD
Based on the control signal of the device, the printer controls the printing device that causes the ink particles to fly and reach the printing target to print.
It is possible to print without applying printing pressure to the surface of the printed wiring board, so there is no damage to the surface of the printed wiring board, and even if the surface of the printed wiring board is convex, the CAD device can be reliably controlled on the printed wiring board. It is possible to print based on

[Brief Description of the Drawings] Figure 1 is a front view of the present invention, Figure 2 is a side view of the same, and Figure 3 is a side view of the same.
The figure is a schematic diagram of the principle of the same inkjet printer, No. 4.
The figure is a sectional view showing an example of the electrostrictive element same as above, FIG. 5 is a control block diagram of same as above, FIG. 6 is a perspective view of another embodiment of the present invention, and FIG. 7 is still another embodiment of same as above. A perspective view of the nozzle of
FIG. 8 is an explanatory diagram showing the printing order of the conventional example,
0 is an ink particle, 101 is a printing device, 102 is a CAD device, and 103 is a printing medium. Agent Patent Attorney Ishi 1) Chief 7th 1st Figure 2 Figure 3 - Ulcer ρ

Claims (1)

[Claims] (1) A printing method characterized in that a printing device that prints by causing ink particles to fly and reach a printing target is controlled based on a control signal output from a CAD device.