JPH0441070A - Spray flux recovering device - Google Patents

Abstract

PURPOSE:To maintain the normal separating function of a cyclone by providing an inertia force dust collecting device for removing splashed fluxes of large grain sizes between a recovering duct and the cyclone. CONSTITUTION:The inertia force dust collecting device 23 for removing the splashed fluxes of large grain sizes is provided between the recovering duct 17 and the cyclone 18 and, therefore, the large grain size fluxes which are tacky adhesive and have large inertia among the splashed fluxes sucked from the recovering duct 17 are removed and recovered by the inertia force dust collecting device 23. The small grain size fluxes which are low tacky adhesive and have the small inertia are, therefore, separated and recovered mainly in the cyclone 18. The normal separating function of the cyclone 18 is assured over a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a spray flux recovery device for recovering the scattered surplus of flux sprayed from a nozzle onto a board to be soldered.

(Prior Art) As shown in FIG. 4, in the conventional spray flux recovery device, when air pressure supplied from an air pressure source 12 is applied to the flux surface in a closed tank 11, this air pressure causes
Only flux is extruded into the tube 13 inserted to the vicinity of the bottom of the tank 11, and this flux is sprayed from the nozzle 14 onto the board 15 to be soldered such as a printed wiring board, and the flux is applied to the front surface of the soldered board. Ru. The scattered surplus of the sprayed flux is sucked from the recovery duct 17 by the blower 16 of the recovery pipe system, separated and recovered by the cyclone 18 in the dust bunker 19, and only the gas is exhausted from the blower 16. 20 is an air pressure gauge.

(Problems to be Solved by the Invention) Conventionally, the scattered flux sucked from the recovery duct 17 is directly guided to the cyclone 18, but among the scattered flux, the large particle diameter flux is highly sticky.
If this large particle diameter flux enters the cyclone 18 as it is and adheres to the inner wall of the cyclone, the fluid resistance within the cyclone increases, causing the normal separation function of the cyclone to be impaired.

Further, the odor (alcohol component) contained in the flux cannot be removed using a cyclone alone.

The present invention has been made in view of the above points, and the first purpose is to prevent the high viscosity, large particle diameter flux sucked from the collection duct from entering the cyclone as it is, and to prevent the normal operation of the cyclone. The purpose is to ensure the separation function for a long period of time, and the second purpose is to remove the odor in the flux.

[Structure of the invention]

(Means for Solving the Problems) The invention of claim 1 provides a method for connecting the soldering plate 15 from the nozzle 14 to the soldering plate 15.
In the spray flux recovery device, a surplus of scattered flux is sucked from a recovery duct 17 and separated and recovered by a cyclone 18. Between the recovery duct 17 and the cyclone 18, large-sized scattered flux is collected. An inertial force dust collector 23 is provided to remove the dust.

The invention of claim 2 provides the cyclone 1 according to claim 1.
This is a spray flux recovery device in which a deodorizing device 31 is provided on the downstream side of 8.

(Function) According to the invention of claim 1, among the scattered fluxes sucked from the collection duct 17, large particle size fluxes with high stickiness and inertia are separated and collected by the inertial force dust collector 23, and the cyclone 18 mainly collects the large particle size fluxes with high stickiness and inertia. The small particle size flux with low inertia is separated and collected.

In the second aspect of the present invention, the deodorizing device 31 removes the alcohol odor in the flux that cannot be removed by the inertial force dust collector 23 and the cyclone 18.

(Example) Hereinafter, the present invention will be explained in detail with reference to the example shown in FIGS. 1 to 3. Note that the same parts as in the conventional example shown in FIG. 4 are given the same reference numerals, and the explanation thereof will be omitted.

As shown in FIG. 1, an inertial force dust collector 23 is flange-connected between a pipe 21 connected to the recovery duct 17 and a pipe 22 connected to the inlet of the cyclone 1a. This inertial force dust collector 23 forcibly changes the flow direction of the fluid to separate coarse particles with a large inertial force and strong straightness from fine particles with a small inertial force and flexible direction changeability, This removes coarse particles.

For example, in the inertial force dust collector 23 shown in FIG. 1, a separating plate 25 for removing large-sized scattered flux is fixed in an inclined manner inside a case body 24. An outlet 26 for the collected flux is provided at the bottom of the case body 24.

As shown in FIG. 2, a vent groove 27 is provided in the lower part of the separation plate 25.

Returning to FIG. 1, a deodorizing device 31 is provided on the downstream side of the cyclone (on the discharge side of the blower 16).

This deodorizing device 31 is for removing the odoriferous alcohol component contained in the flux, and uses an activated carbon type or a water-soluble type.

For example, when an example of a water-soluble deodorizing device 311 is shown in FIG. 3, a pipe 33 drawn out from the discharge side of the blower 16 is inserted into a bubbling water tank 32, and an injection cylinder 34 is installed at the tip of this pipe 33. It is connected. Then blower 16
When the air discharged from the pipe 33 is blown into the water in the water tank 32 from the large number of small holes 35 of the injection cylinder 34, the odorous alcohol component contained in the air is dissolved in the water, making it odorless. Only clean air is released from inside the aquarium into the atmosphere.

Next, the operation of the embodiment shown in FIG. 1 will be explained. Only the flux is pushed out from the tank 11 into the pipe 13 by air pressure, and this flux is sprayed from the nozzle j4 onto the soldering board 15 such as a printed wiring board. It is sucked from the collection duct 17 by the blower 16 . Of the scattered flux sucked from the collection duct 17, the large particle size flux with high stickiness and inertia hits the separation plate 25 of the inertial force dust collector 23 and is directly collected by this separation plate 25, or Or, along this separation plate 25,
By being given an inertial force of \, it accumulates at the bottom of the case body 24 and is collected from the outlet 26.

On the other hand, small particle size fluxes with low viscosity and inertia are
The air is guided along with the air through the ventilation notch 27 of the separation plate 25 to the cyclone 18, where the air and the small particle size flux are separated, the flux is collected in the dust bunker 19, and the air is passed through the blower 16. The flux is sent to a deodorizing device 31, where the alcohol odor in the flux that could not be removed by the inertial force dust collector 23 and the cyclone 18 is removed, and only odorless and clean air is released into the atmosphere.

〔Effect of the invention〕

According to the invention of claim 1, since the inertial force dust collector for removing large-sized scattered flux is provided between the collection duct and the cyclone, sticky and sticky particles are removed from the scattered flux sucked from the collection duct. The large particle size flux with high inertia is removed and collected by the inertial force dust collector, and the cyclone mainly separates and collects the small particle size flux with low viscosity and inertia, so the normal separation function of this cyclone is prolonged. Can be secured for a period of time.

According to the second aspect of the invention, the alcohol odor in the flux can be removed by the deodorizing device, and only odorless and clean air can be released into the atmosphere.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing one embodiment of the spray flux recovery device of the present invention, Fig. 2 is a front view showing a separation plate in the inertial force dust collector, and Fig. 3 is a front view of the deodorizing device. FIG. 4 is a perspective view showing an example, and FIG. 4 is a front view showing a conventional spray flux recovery device. 14...Nozzle, 15...Soldering board, 17...Recovery duct, 18...Cyclone, 23...Inertial force dust collector, 31...Deodorizing device.

Claims (2)

[Claims] (1) In a spray flux recovery device in which the scattered surplus of flux sprayed from a nozzle onto a board to be soldered is sucked from a recovery duct and separated and recovered by a cyclone, large particles are collected between the recovery duct and the cyclone. A spray flux recovery device characterized by being equipped with an inertial force dust collector that removes scattered flux of a diameter. (2) The spray flux recovery device according to claim 1, further comprising a deodorizing device provided downstream of the cyclone.