JPS61238465A - Creamy solder coating equipment - Google Patents

Abstract

PURPOSE:To enable the soldering on electronic circuit board surely in short time of the adequate quantity of solder even for the minute shaped pattern by using both the solder coating mechanism in a screen printing method and the air pressure mechanism in a dispenser method. CONSTITUTION:A notched hole 6 is provided on the continuous metal strip 1 having flexibility and the solder 5 filled up in the notched hole 6 by the coating mechanism 2 is adhered with its dislocation on the electronic circuit board 4 by the air jet when the metal strip 1 comes under the air jet mechanism 3 with turning. By using both the solder coating mechanism in the screen printing method and the air pressure mechanism in the dispenser method like this the adequate solder quantity can be coated on the electronic circuit board surely and yet in short time even for the minute shaped pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cream solder applicator used for assembling electronic circuit boards.

[Conventional technology]

Conventional cream solder applicators include a screen printing device as shown in FIG. 2 and a dispenser device as shown in FIG. 3.

The screen printing device shown in FIG.
The solder paste 1110112 is applied to the electronic circuit board 4 by passing through the cutout hole 6 of the screen, and the dispenser device shown in FIG. It is applied to

[Problem that the invention seeks to solve]

Among these, in the screen printing apparatus shown in FIG. 2, the amount of solder applied is adjusted depending on the thickness of the screen plate, so there is a drawback that the applied pattern cannot be made very small. Furthermore, since it is impossible to print if there are protrusions on the printing surface, there is a drawback that printing must be performed before mounting other parts.

In addition, the dispenser device shown in Figure 3 uses a method that uses air pressure to discharge cream solder from a needle-shaped discharge port, so it has the advantage that it is less susceptible to the effects of surrounding protrusions than the printing method. However, on the other hand, there are drawbacks such as the long coating time required for discharging one point at a time and the difficulty in adjusting the discharge pattern to a constant level.

[Means for solving problems]

The cream solder applicator of the present invention includes: a continuous flexible metal band having a plurality of notched holes; a solder applicator mechanism for closely adhering cream solder to the metal band;
It has an air jetting mechanism that releases cream solder adhering to the metal strip.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

In the cream solder applicator shown in FIG. 1, a metal strip 1 has a cutout hole 6, and the solder 5 filled in the cutout hole 6 by the applicator mechanism 2 is transferred to an air jet mechanism 3 by rotation of the metal strip 1.
When it reaches the bottom, it is transferred and adhered to the electronic circuit board 4 by the air jet. If the cutout holes 6 of the metal strip 1 are arranged as shown in FIG. 4, for example, it is possible to apply solder to the electronic circuit board 4 in a similar shape.

〔Effect of the invention〕

The cream solder applicator of the present invention uses a solder applicator mechanism based on a screen printing method in combination with an air pressure machine groove in a single dispenser type, thereby ensuring an appropriate amount of solder even for finely shaped patterns. It has the effect of being able to be applied to electronic circuit boards in a short time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an example of the present invention, FIG. 2 is a longitudinal sectional view showing an example of a conventional screen printing device, and FIG. 3 is a longitudinal sectional view showing an example of a conventional dispenser device. FIG. 4 is a cutaway layout diagram of the metal strips in the embodiment shown in FIG. 1.

Claims (1)

[Claims] a continuous flexible metal strip having a plurality of cut holes;
A cream solder applicator comprising: a solder applicator that applies cream solder in close contact with the metal band; and an air jet mechanism that removes the cream solder that adheres to the cutout hole of the metal band.