JPH0225575Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic soldering device having a feature in a preheater portion.

[Conventional technology]

Generally, automatic soldering equipment uses a fluxer that applies flux to the object to be soldered, a preheater that preheats the object to be soldered, and a solder bath that attaches molten solder to the bottom surface of the object to be soldered. Together, they form the basic structure of an automatic soldering line.

[Problem that the invention attempts to solve]

If a problem occurs in such an automatic soldering line, the line will temporarily stop in an emergency, but at that time, the object to be soldered will also come to an emergency stop on the preheater, so the object to be soldered will be placed on the preheater. For example, integrated circuit components mounted on a printed wiring board as an object to be soldered may be destroyed by the heat.

On the other hand, even when the above-mentioned trouble occurs, it is easy to stop the power supply to the preheater.
This preheater cannot be stopped. This is because if the temperature of the preheater drops by stopping the power supply to the preheater, the next time the preheater is used, it will take time to reach the operating temperature after restarting.

An object of the present invention is to protect a soldered object that has come to an emergency stop on a preheater from the heat of the preheater without stopping the power supply to the preheater.

[Means for solving problems]

In the present invention, at least along the fluxer 3, preheater 4, and solder bath 5, the soldering object 1
In an automatic soldering device that solders the soldering object 1 while conveying the soldering object, air for cooling the soldering object is supplied to the soldering object moving path on the preheater 4 during an emergency stop of the conveyance. Air supply members 41 and 42 are provided for blowing air.

[Function] The present invention supplies normal temperature air or cooling air to the air supply members 41 and 42 when a trouble occurs in the automatic soldering line and the soldering line is brought to an emergency stop.
The air is blown onto the object 1 to be soldered from 1 and 42, and the cooling effect of this air suppresses the rise in temperature of the object 1 caused by the heating of the preheater 4.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

As shown in the figure, a fluxer 3, a preheater 4, a solder bath 5, and a cooling fan 6 are sequentially installed in the conveying direction along a conveyor 2 of an automatic soldering line that conveys a printed wiring board 1 as an object to be soldered. establish.

The fluxer 3 jets foamed flux from a foam tube 11 through a nozzle 12, and applies the foamed flux 13 to the lower surface of the printed wiring board 1.

The preheater 4 includes a sheathed heater 22 that radiates high heat when energized and is disposed inside a main body frame 21 over the entire surface.

The solder bath 5 jets molten solder from a nozzle 32 that is pumped under pressure by a rotationally driven pump blade 31, and the solder jet 33 coats the lower surface of the printed wiring board 1 and its mounted components 34.
Solder the leads.

Furthermore, the main body frame 21 of the preheater 4
A lower air jet pipe 41 as an air supply member that blows air for cooling the soldered object to the movement path of the soldered object on the preheater 4, and an upper air jet on the lower and upper sides of the A tube 42 is provided.

The lower air jet pipe 41 is connected to the main body frame 2.
1, and an air nozzle 43 is connected to the bottom surface of the main body frame 21. The upper air ejection pipe 42 is arranged to correspond to the entire body frame 21, and has a large number of small holes as air nozzles bored in its lower surface.

An air supply pipe 44 is connected to the lower air jet pipe 41 and the upper air jet pipe 42, and this air pipe 44 is connected to a solenoid valve (not shown), an air cooler, etc. from an air supply source such as an air compressor. A pressurized supply of normal temperature air or cooled air is received through the air conditioner.

Then, when the automatic soldering line is operating normally, the solenoid valve that controls the supply or stop of air to the air supply pipe 44 is closed, and the air jet pipes 41 and 42 are speech bubbles have stopped. Therefore, the preheater 4 is
The printed wiring board 1 etc. are heated normally.

Next, when a problem occurs in the automatic soldering line and the soldering line comes to an emergency stop, the solenoid valve opens in conjunction with the emergency stop of the line, and room temperature air or cooling air is supplied from the air supply source to the bottom. Pressurized air is supplied to the side and upper air ejection pipes 41 and 42, and the air is blown onto the printed wiring board 1 and its mounted parts 34.

Thereby, the printed wiring board 1 and its mounted components 34 are cooled by the air, and a temperature increase due to the heating action of the sheathed heater 22 can be suppressed.

Therefore, even if the printed wiring board 1 remains stopped on the preheater 4 due to trouble in the soldering line, the printed wiring board 1 will not be excessively heated, and the printed wiring board 1 34 parts such as ICs installed in
is not destroyed by heat.

[Effect of idea]

According to the present invention, an air supply member is installed to blow air for cooling the soldering object to the movement path of the soldering object on the preheater when the conveyance is stopped in an emergency, so troubles will not occur in the automatic soldering line. Even when this line is brought to an emergency stop, the air supply member blows air to the soldered object that has come to an emergency stop along the moving path to cool the soldered object, thereby stopping energization to the preheater. The object to be soldered, which has stopped on the preheater, can be effectively protected from the heat of the preheater. Further, it is possible to prevent the possibility that the mounted components and the like as objects to be soldered will be destroyed by heat. In particular, since it is only necessary to blow air from the air supply member to the soldering object, air cooling of the soldering object can be started immediately from the moment when the conveyance of the soldering object is stopped in an emergency, thereby causing thermal destruction of the soldering object. can be reliably prevented. Such air blowing can be easily automated.

Furthermore, since there is no need to stop the power supply to the preheater, the preheater can be used immediately when the automatic soldering line is restarted, and unnecessary downtime of the soldering line can be eliminated.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the automatic soldering device of the present invention. 1, 34...Printed wiring board and parts as objects to be soldered, 3...Fluxer, 4...Preheater, 5...Solder bath, 41, 42...Air jet pipe as an air supply member.

Claims (1)

[Scope of utility model registration request] In an automatic soldering apparatus that performs soldering on an object to be soldered while conveying the object along at least a fluxer, a preheater, and a solder tank, the movement path of the object to be soldered on the preheater is An automatic soldering device characterized by being equipped with an air supply member that blows air for cooling objects to be soldered during an emergency stop of conveyance.