JPH0327302B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in fluxers used in automatic soldering equipment for electronic equipment and the like.

[Prior Art] There are various types of fluxers used in automatic soldering equipment, such as a foaming type, a spray type, a jet type, and a static type, all of which are equipped with a flux tank containing a flux liquid. For example, a foaming type fluxer, as shown in FIG.
a porous foaming tube 14 placed in the foaming tank 10;
It consists of a pneumatic circuit (not shown) that sends pressurized air to the foaming tube, and a saucer 16 attached to the upper edge of the flux tank 12, and blows pressurized air from the foaming tube 14 into the inner layer 10 to release the flux. foam the liquid,
This is a method in which the flux is applied by causing bubbles of the flux to adhere to the printed circuit board 30 moving in the direction of arrow A. Although not shown, a spray type fluxer is equipped with a single flux tank, a net drum that scoops up the flux liquid, and a spray nozzle that injects air from inside the net drum to atomize the flux. This is a method in which flux is applied to non-processed objects such as printed circuit boards. The jet type is a method in which the flux liquid is ejected as a jet from a nozzle in the flux tank, and the printed circuit board is brought into contact with the jet.The static type is a method in which the printed circuit board is brought into contact with the surface of the stationary flux liquid in the flux tank. be.

[Problems to be solved by the invention] A heater is placed close to the fluxer in an automatic soldering machine, but since the flux liquid contains flammable alcohol, the flux ignites and burns. Things also happen. Therefore, there has been a strong demand for a fluxer that can easily extinguish the fire even if the flux ignites. The present invention was made in response to this need, and its purpose is to provide a fluxer equipped with a fire extinguishing device that can immediately extinguish a fire when flux ignites or burns.

[Means for Solving the Problem] In order to achieve the above object, the features of the present invention are as follows: As shown in the embodiment of FIG. It is connected to a water supply source 22 such as the like via an on-off valve 24. The water from the water supply source 22 is directly supplied to the flux tank 12.
Alternatively, the diluted flux liquid may overflow from the flux tank 12 and enter the water tank 20. From the water supply source 22 to the flux tank 12 and the water tank 2
It is desirable that a certain amount of water is supplied to fill up the tank.

[Operation] When the flux is ignited or ignited, the on-off valve 24 is opened manually or by an automatic control device equipped with a sensor that detects ignition or ignition.
The water from the water supply source 22 flows into the water tank 20 and the water level of the water tank 20 rises, and either flows into the flux tank 12 to extinguish the combustion of the flux liquid, or directly flows into the flux tank 12 to extinguish the combustion of the flux liquid. Extinguish the fire and pour the diluted flux into the water tank.

[Example] The fluxer of the present invention will be explained based on the example shown in the drawings, but the present invention is not limited to the foamed fluxer of the example, and may be applied to other types of fluxer, such as a spray fluxer, a jet fluxer, etc. It goes without saying that the present invention can also be applied to stationary fluxers, etc. as is.

As shown in FIG. 1, the foaming tank 10 and the flux tank 12 are double-sided, communicating with each other, and the foaming tank 10 projects higher than the flux tank 12. A saucer 16 is attached to the upper edge of the flux tank 12 to receive the foamed flux dripping down and guide it into the flux tank. The flux tank 12 is arranged in a water tank 20, and the side wall of the tank is set lower than the lower end of the object to be treated but higher than the saucer 16. Aquarium 2
A water injection pipe 23 is provided from 0 to the tank 22, and an on-off valve 24 is installed in the middle thereof. The water level of the tank 22 is adjusted to the height of the side wall 21 of the water tank 20. The on-off valve 24 is opened and closed manually or by an automatic control device 25. The automatic control device 25 opens and closes the on-off valve 24 according to the signal from the sensor 26.

A foaming tube 14 made of sintered metal is disposed at the bottom of the foaming tank 10, and pressurized air is fed into the foaming tube via a pneumatic circuit 15.

A predetermined amount of flux liquid is put into a foaming tank 10 and a flux tank 12, and pressurized air is passed through a porous foaming tube 14.
When the air is introduced into the foaming tube 14, the air is ejected as bubbles into the flux liquid from the circumferential surface of the foaming tube 14, thereby foaming the flux in the foaming tank 10. The foamed flux rises as shown by arrow B and is blown out from the upper surface of the foaming tank 10 as a foamed flux layer. An object to be processed, such as a printed circuit board, moving in the direction of arrow A is brought into contact with the flux foamed layer to apply flux.
The overflowing foamed flux drips down into the saucer, returns to the flux liquid, and flows down into the flux tank 12 as shown by arrow C. Since flux contains flammable alcohol, foamed flux can sometimes catch fire due to the influence of heaters located close to the fluxer. When the sensor 26 or the operator detects the ignition and opens the on-off valve 24, the water in the tank 22 flows into the water tank 20, filling the water tank 20 with water and submerging both the foaming tank 10 and the flux tank 12. The combustion of the foam is prevented, and the ignited foam flux is also extinguished.

As shown in FIG. 2, in order to supply a certain amount of water, a water injection pipe 23 is provided which runs from a meterable tank 22 through an on-off valve 24 to a position higher than the flux level in the flux tank 12. Water tank 2 is placed at a higher position than the flux level of flux tank 12.
A communication hole 16 communicating with 0 may be provided. In this case, when the on-off valve 24 is opened, water in the tank 22 directly flows into the flux tank 12 to dilute the flux liquid and prevent combustion of the flux liquid, and the diluted flux liquid passes through the communication hole 16 into the flux tank 12. Enter 20. Here, the amount of water injected from the tank 22 is set in advance so that the water tank 20 will be filled with water, but the water will not overflow to the outside.

[Effects of the Invention] As described above, in the fluxer of the present invention, the flux tank is arranged in the water tank 20, and when the flux ignites, the water level in the water tank 20 rises to submerge the flux tank and dilute the flux liquid. Since the combustion of the flux is prevented, there is no risk of burning the flux and causing a fire, which is a special effect that cannot be achieved with conventional products.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a fluxer of the present invention, FIG. 2 is a view corresponding to FIG. 1 of another embodiment, and FIG. 3 is a sectional view of a conventional fluxer. In the figure, numeral 10 is a foaming tank, 12 is a flux tank, 20 is a water tank, 22 is a tank (water supply source),
24 indicates on-off valves, respectively.

Claims (1)

[Claims] 1. A fluxer equipped with a flux tank,
The flux tank is installed in a water tank, and the height of the water tank is lower than the height through which the object to be treated passes, but higher than the height of the flux tank, and either or both of the water tank and the flux tank are A fluxer equipped with a fire extinguishing device characterized in that it is connected to a water supply source through an on-off valve. 2. A fluxer equipped with a fire extinguishing system according to claim 1, further comprising an automatic control device that opens and closes an on-off valve based on a signal from a sensor that detects ignition of flux. 3. A fluxer equipped with a fire extinguishing device according to claim 1, wherein the water supply source is a meterable tank. 4. A fluxer equipped with a fire extinguishing device according to claim 1, wherein the flux tank is provided with a communication hole that communicates with the water tank.