JPH0330491A - Device for screen-printing circuit pattern - Google Patents

Abstract

PURPOSE:To change the direction in which a squeegee is made to slide so as to print a circuit pattern well on a board by a method wherein a squeegee device is made to ascend by operating a lifter and to rotate it horizontal to a screen mask. CONSTITUTION:When a pattern hole 8 bored in a screen mask 1 has a major axis in an X direction or a Y direction, a rod 22 of a cylinder 20 is made to recede, a squeegee device is made to ascend, a pin hole 36c is released from a pin 36a, and the squeegee device is horizontally rotated by an angle of 90 degrees centering on a lifter 20 to change the direction of the squeegee device so as to enable a squeegee 16 to slide along the direction of the pattern hole 8. A board 40 is made to ascend to made its upside approach to the underside of the screen mask 1, and a motor 32 is driven to make the squeegee 16 slide on the screen mask 1 to print paste or cream solder.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a screen printing device for circuit patterns, and the sliding direction of a squeegee can be changed in accordance with the directionality of pattern holes made in a screen mask. This is how it was done.

(Prior art) Prior to mounting electronic components such as IC chips and LSI chips on a board, a circuit pattern is printed on the board using a screen printing device using conductive paste, resistive paste, etc., and then the printed circuit is printed on the board using a screen printing device. Cream solder for soldering electronic components is printed on the electric wire part of the pattern.

This type of screen printing apparatus brings the top surface of a substrate close to the bottom surface of a screen mask in which pattern holes are formed, and slides a squeegee over the screen mask.
The circuit pattern is printed on the board.

(Problems to be Solved by the Invention) By the way, pattern holes formed in a screen mask may have directionality. That is, in FIG. 3(a), the pattern holes 101 formed in the screen mask 100 are horizontally elongated in the X direction, and in this case, the squeegee 1
02 in the X direction, which is the length direction of the pattern hole 101, it is possible to print paste or cream solder on the substrate 103 in a good manner. However, in the same figure (b)
If the pattern holes 101 are horizontally elongated in the Y direction perpendicular to the sliding direction X of the squeegee 102 as shown in FIG. Ta.

Therefore, an object of the present invention is to provide a means for printing paste or cream solder on a substrate in a good manner in accordance with the directionality of pattern holes made in a screen mask.

(Means for Solving the Problems) For this purpose, the present invention provides a screen mask in which pattern holes are formed, and a screen mask that is disposed on the screen mask at intervals and that slides on the screen mask. In a screen printing device consisting of two squeegee devices,
A lifting device is provided in the center of the two squeegee devices to raise and lower the squeegee devices integrally, and these squeegee devices are arranged to be horizontally rotatable around this lifting device. A positioning section is provided for positioning these squeegee devices in the horizontal and vertical directions when the device is lowered onto the screen mask.

(Function) In the above configuration, if the pattern holes formed in the screen mask have directionality, the rising! ! By activating the S device to raise the squeegee device and rotate it horizontally with respect to the screen mask, the sliding direction of the squeegee is changed so that the sliding direction of the squeegee is along the direction of the pattern holes.

(Example) Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of the screen printing apparatus, and FIG. 2 is a cross-sectional view, in which 1 is a screen mask, and above this screen mask 1 is a frame-shaped table 35, and further above that is a frame-shaped table 35. A frame 2 is provided. This screen mask 1 has pattern holes 8 formed therein.

40 is a substrate, and 41 is a substrate holder that supports the substrate 40. Two holders 3.3 for holding the frame 2 are provided on the frame 2 at intervals. A plate 5 is horizontally arranged inside the frame 2. Guide rails 4 in the Y direction are attached to the inner surfaces of both sides of the frame 2, and plate bodies 6 are attached to both ends of the plate 5.
is installed. A slider 7 that fits into the guide rail 4 is attached to the plate body 6, so that the plate 5 is slidable along the guide rail 4 in the Y direction.

A cylinder lO is arranged in the center of the plate 5. 12 is a bracket attached to the rod 11 of the cylinder 10; 13 is a squeegee holder detachably attached to the notch 14 of the bracket 12 with a bottle 15;
16 is a squeegee, and these 12 to 16 constitute a squeegee device. Therefore, rod 1 of cylinder 10
1 protrudes and retracts, the squeegee 16 moves up and down and comes into contact with and leaves the screen mask l.

17 is a lifting guide provided on both sides of the cylinder 10;
Reference numeral 18 denotes a level adjuster such as a micrometer, which adjusts the squeegee 16 to the level.

Reference numeral 20 designates the holder 3 and a cylinder as a lifting device provided at the center of the holder 3.

Reference numeral 21 denotes a connecting member that connects the holders 3, and the rod 22 of the cylinder 20 is rotatably attached to this connecting member 21 via a bearing 23.

Reference numeral 24.24 is a lifting guide provided upright on the holder 3.3, and both guides 24.24 are connected by a connecting plate 25. 26 is a connecting plate provided below the connecting plate 25, and the cylinder 20 is connected to the cylinder 20 via a bearing 27.
It is rotatably attached to this coupling plate 26. A support frame 28 supports the cylinder 20, the guide 24, the squeegee devices 11 to 16, and the like.

30 is a rack attached to the inner surface of the frame 2, 31
is a pinion that engages with this rack 30, and 32 is a motor for driving the pinion 31.

The rank 30 and the plate 5 are connected via a placket 33, and the squeegee device slides along the guide rail 4 in the Y direction by driving the motor 32.

On the upper surface of the table 35, positioning portions 36 are provided at at least two locations. This positioning portion 36 consists of a threaded pin 36a and a nut 36b screwed onto the pin 36a. Also, the above holder 3
A pin hole 36c into which the pin 36a fits is bored in the lower surface of the pin 36a.

This screen printing device consists of the above configuration,
Next, the handling operation will be explained.

The pattern holes 8 opened in the screen mask 1 are the third
As shown in FIGS. (a) and (b), when the squeegee device has a horizontal directionality in the X direction or the Y direction, the orientation of the squeegee device is changed so that the sliding direction of the squeegee 16 is in that direction. In this case, the rod 22 of the cylinder 20 is removed, the squeegee device is raised, and the bottle hole 36c is opened in the bottle 3.
After removing 1ii11 from 6a, the squeegee device is horizontally rotated 906 around the lifting device 20.

In this embodiment, horizontal rotation is performed manually, but horizontal rotation may be performed using power means such as a motor.

If the squeegee device is rotated 90″, the cylinder 20
The squeegee device is positioned horizontally and vertically by protruding the rod 22, lowering the squeegee device, fitting the bottle hole 36c into the hole 36a, and landing the lower surface of the holder 3 on the nut 36b. Further, the level of the squeegee device is adjusted by manually turning the nut 36b to adjust its height.

In this way, once the orientation of the squeegee device is changed so that the sliding direction of the squeegee 16 is along the direction of the pattern holes 8, the substrate 40 is brought up and its upper surface is brought close to the lower surface of the screen mask 1. Then, drive the motor 32 to slide the squeegee 16 over the screen mask 1.
Print paste or cream solder.

(Effects of the Invention) As explained above, the present invention provides a screen mask having pattern holes, and two masks that are arranged on the screen mask at intervals and that slide on the screen mask. A lifting device is provided in the center of the two squeegee devices to raise and lower these squeegee devices integrally, and these squeegee devices are arranged horizontally rotatably around this lifting device. Since the squeegee device is provided with a positioning section that positions the squeegee device horizontally and vertically when the squeegee device is lowered onto the screen mask, the pattern holes formed in the screen mask are By changing the sliding direction of the squeegee in accordance with the directionality etc., it is possible to print a circuit pattern on the board well without clogging or blurring.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a screen printing device, Fig. 2 is a sectional view, and Fig. 3 (a
>, (b) is a plan view of a conventional screen mask. 1...Screen mask 8...Pattern holes 12-16...Squeegee device 20...Cylinder 36 as a lifting device...Positioning section

Claims (1)

[Claims] There is a screen mask in which pattern holes are formed, and two squeegee devices that are arranged on the screen mask at intervals and that slide on the screen mask, and a center of the two squeegee devices is provided. The squeegee device is provided with an elevating device that raises and lowers these squeegee devices integrally, and the squeegee devices are arranged so as to be horizontally rotatable around this elevating device, and these squeegee devices are lowered onto the screen mask. 1. A screen printing device for circuit patterns, characterized in that a positioning section is provided for positioning these squeegee devices horizontally and vertically in a state in which the squeegee device is in the horizontal and vertical directions.