JPS6045090A - Screen printing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This project relates to a screen printing apparatus used for printing electrodes of thick film integrated circuits, etc.

In the prior art, for example, one of the seven important steps in the production of thick film integrated circuit devices is the step of applying solder paste onto various patterns of a thick film integrated circuit substrate. This solder paste application is currently mainly performed using either the following dispenser method or screen printing method.

Fig. 7 shows one type of 111-side pump, which is a method in which a dispenser length nozzle (21) applies solder paste + 31'i dots as a collection or spot, and fl. Figure 2 shows the screen printing method, in which a screen printing mask (4) is positioned on the substrate +11, and the mask (41) is supplied with vc and fc Ushiyamada paste 31 is spread with a squeegee (6). This method involves coating the substrate (1) through a mask (4).

The one-way dispenser type has the versatility to adapt to the solder application pattern on the board (1), but the usual solder application pattern has shapes such as squares and round shapes, as shown in Figure 3. , various patterns with different areas P3-%P
2..., and each German Bakun P like this
If you apply solder paste (3) to a particularly large area pattern in P2... with a single dispenser, it will take a lot of time to apply it to the entire surface of the vacuum, reducing work efficiency. Also, it is extremely difficult to adjust the amount of application and is therefore unsuitable.

On the other hand, with the screen printing force type, the work efficiency is not affected even if the shape and area of the solder application pattern PHP2.e. 1' 2 The paste is applied all at once, and since the squeegee (5) is used, it has the advantage that the amount of application can be easily adjusted. However, if there is a change in the solder application pattern, it cannot be easily followed and has poor flexibility.Especially in the case of high-mix, low-volume reproduction, it is necessary to prepare many types of masks, which is uneconomical. mQi=m, in which the moving speed K of the squeegee (5) that slides on 14+ is made variable by S public VC, and screen printing is performed at the best squeegee speed according to various solder application patterns P□, P2... However, there was still room for improvement in the finish.

I-1 Object of the Invention It is an object of the present invention to provide a screen printing device that takes into consideration the drawbacks of the Niga method and takes advantage of its advantages.

2. Structure of the invention The present invention is an apparatus using a screen printing method,
A plurality of screen printing masks fr for each of multiple types of 9μ screen printing patterns, a vertically installed outer ring arranged integrally in the It'J force rotation, and an outer ring that rotates this outer shaft intermittently between the two directions. Using the rotation of the outer shaft, apply the coating material for screen printing from a fixed direction onto the inner surface of the mask of the outer ring.
an inner ring which is disposed in the lower part of the outer ring so as to be rotatable in the coaxial direction and which, when rotated, pushes out the coating material that has been applied to the inner surface Vcl of the lower mask of the outer ring to the outer surface of the same mask; and an inner ring drive 1sls which independently rotates this inner ring. 0 songs not listed consisting of
Change of screen printing pattern on tna printed matter Vc Selectively rotate the troublesome mask so that it is at the bottom, and of course screen print with the selected mask at the bottom by rotating the inner ring. If the printing pattern of the printing material is Ma type, the outer ring (HE) is rotated accordingly and the wave printing is divided into μN times and selectively printed using 8 masks. The high workability of screen printing can be utilized, and the printing pattern quality can be easily combined with the versatility of a single despenser type.

161 is above the horizontal conveyance path (7) of the board 1m] when applying the "X example zero start" to the solder screen printing apparatus for the above board (5) and explaining from the hanging diagram and FIG. 5. Turn into position gOI
With the flexible outer ring installed in Noh.

Selectively and intermittently rotate a long elliptical j end cut up and down. +8
1 +81... is a screen printing mask integrated with a plurality of M forming the entire periphery of the outside -+61, each having a different screen printing pattern q, Q2.... (9) is an external drive unit that rotates the outer ring (61) intermittently,
For example, the outer ring tsi V is connected within the upper part of the outer ring 161.
The external transfer roller 110+ that applies C feed and the l motor that rotates this are installed.
Coating material PL, which is a printing coating material, solder paste 131, which is applied from a fixed direction to the inner surface of 81, is applied over the entire width direction. Part of the haze is shown.

a4J is an inner ring disposed in the axial direction of the lower part of the outer ring 161. %O is an inner ring that rotates the inner ring independently, and is a rotating part. A squeegee (1'4...) is elastically supported by a fist and protrudes one point in the axial direction. Each squeegee (1
η0η... is outside 1i4161 mask 181
Gently press the elastic mouth on the inner surface, J l+? -Contact and sequentially.”
dO does. U rumor O mark is inner ring - and outer ring rotation low 2110
) At the same time, the outer shaft 161 (D) A cover that also serves as a rail for regulating the sliding direction of both ends, and a 4-ton overseas export transport a-ra 1101 (which holds the upper part of the 61). Wipe the upper VC@ mask (solder paste spread on the outer surface of li+) 3) connected to the outer wheel drive unit (9) and rotate in the same direction as the outer wheel [61] with a wiping loaf. Next, the operation of the above apparatus will be explained. When performing Ushida coating on the substrate (1) with one pattern P1, for example, seven masks (with the outer ring so that 81 is at the bottom) each having a screen printing pattern Ql that matches this pattern P1vc are used. 101 is selectively rotated. During this rotation, the selected mask (8) is placed near the tip of the solder supply pipe (1), and during this period, solder paste is applied to the inner surface of the selected mask (8) from the solder supply pipe U (to). 13).Meanwhile, attach the substrate fi+ to the outer ring [f
It is carried to a fixed position near the bottom of i+, and the half-wave spread surface corresponding to the + pattern PIVC on the substrate 1 is aligned with the pattern Ql of the selection mask (8). After that, rotate the inner QH and use the squeegee l17) to select the selection mask (81'
e Press the selection mask ta+ on the coffin board Ill one after another.
Print the half 1'' paste+a+15 pattern Q□ on the substrate ill attached to the inside IJiI. When the 7th printing is completed, stop the part II%H4) and then turn on the board +
11 i Separate from the outer ring +61 and remove the pattern Ql mask (8
Select 1 and send it to the bottom. After that, each pattern P□ on the board 111 is produced in the same manner as described above.

Mask 181 fill... corresponding to P2...
Then I started screen printing one by one.

Note that the present invention is not limited to the above-mentioned embodiments.1 For example, the above-mentioned apparatus is installed in the conveyance path of the printing material, a plurality of them are arranged in a series, and the screen printing patterns of the masks of 1≦ are made different at the bottom of each. It is also possible to sequentially feed the substrates under each device. Furthermore, in terms of structure, for example, as shown in FIG. 6, the outer ring may be configured as a circular drum-shaped outer ring 16)'. We offer a highly effective screen printing device that combines both productivity and versatility. Furthermore, by setting the rotational speed of the inner ring to 0Jffi according to the mask used in the outer li-screen printing, the best screen printing can be performed according to the mask VC, and the quality of screen printing can be improved.

[Brief explanation of drawings]

FIG. 1Vi and FIG. 2 show a conventional solder coating device 11.
3 is a plan view of the printing material, and FIGS. V and 5 are partially sectional perspective views and side views showing one embodiment of the present invention. FIG. 7 is a side view showing another embodiment. 16116I・-Outer ring, (8)・-Mask, Ql, Q2
・・@% −・Screen printing pattern, t9r-e outer wheel drive part, 021・・Coating material (solder paste), H・
・Inner wheel, 1llil...Inner wheel drive section.

Claims (1)

[Claims] (1) Several types of screen printing An outer ring is formed by arranging a plurality of screen printing masks for every 7-inch turn in a series in the same direction, and the outer ring is hung vertically and selectively rotated in the circumferential direction. an outer wheel drive section, a coating material replenishment section that supplies screen printing coating material from a fixed direction to the inner surface of the mask of the outer ring, and the mask that is rotatably disposed below the outer ring within t A screen printing device characterized in that it is fully equipped with an inner ring that extrudes and applies coating material adhered to the inner circumferential surface of the mask onto a screen printing substrate disposed on the outer surface of the mask, and an inner ring drive unit that rotates the inner ring independently. Device.