JP2815788B2 - Device for preventing unnecessary flux from adhering to wiring board in spray type fluxer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to injection the mist of flux
In fog to spray fluxer, spray fractionation to prevent unwanted fluxes attachment of the wiring board such as a printed board
The present invention relates to a device for preventing unnecessary flux from adhering to a wiring board in a semiconductor device.

[0002]

2. Description of the Related Art A wiring board has an area where soldering is unnecessary, and this area is also an area where flux or solder melt is not desired to adhere. One example is an electrode for a connector provided at an end of a wiring board. In the soldering process,
For example, if a flux adheres to the electrode for the connector, a contact failure occurs during use. Therefore, masking is performed by attaching a tape to the electrode to prevent the adhesion of flux, which is a harmful substance.

FIG. 6 is a plan view showing a conventional example in which masking is performed to prevent the adhesion of flux and solder, which become harmful substances, to an area of the wiring board where soldering is unnecessary. Reference numeral 1 denotes a wiring board. The electrode 2 for the connector is provided in a long shape at a portion to be the end 1a. 3A is a dividing V for dividing the wiring board 1 into, for example, 18 pieces.
The groove 3B is also a perforation for division. Reference numeral 4 denotes a masking tape (shown by a two-dot chain line) adhered to the electrode 2 as shown by a two-dot chain line, and also shows an area 5 where soldering is unnecessary.

[0004] As described above, after the tape 4 is attached to the electrode 2, the wiring board 1 is conveyed in the direction of arrow A, and is subjected to fluxing and soldering. It is divided along the groove 3A and the perforations 3B.

[0005]

When the flux processing or the soldering processing is performed on the wiring board 1 having the electrodes 2 as described above, the region 5 where the electrodes 2 are formed is formed.
Although the tape 4 is attached to the tape, attaching the tape 4 requires an operation of attaching the tape 4 and an operation of peeling the tape 4 after the soldering process. After the flux treatment, the adhesive of the tape 4 adheres to the electrode 2 due to the heat at the time of the soldering treatment. Therefore, the adhesive remains on the electrode 2 when the tape 4 is peeled off. Therefore, a cleaning device for removing the adhesive is provided. Therefore, there has been a problem that the number of work processes increases and the production cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems .
Unnecessary flux on the wiring board in a spray-type fluxer that prevents fog- like flux from adhering to areas where application is not required
It is an object of the present invention to obtain a box adhesion prevention device.

[0007]

According to the present invention, there is provided a spray type fan.
Unnecessary flux adhesion preventing device on the wiring board in laksa has a enclosure having an opening that surrounds the area to prevent adhesion of mist flux, air inside the enclosure
Equipped with an ejection pipe having an ejection port for ejecting a body
You.

Further, the ejection ports are formed so as to be distributed over substantially the same length as the length of the ejection pipe in the longitudinal direction.

The enclosing member has a U-shaped circular cross section on the side to which the mist-like flux adheres.

Further, the enclosing member has a V-shaped acute angle cross section on the side where the mist-like flux adheres.

Further, the enclosing members are arcuate or V of order to promote <br/> dropping of the external lateral and misty flux liquefied adhered to the lower surface, its U-shaped cross section of shape
In which sagging cover formed sharp angle is removably mounted on the lower surface of the enclosing member.

[0012]

In the present invention, for example, the mist-like flux spouted from the spout of the spray nozzle is applied except for the portion covered by the surrounding member.

Further, the gas <br/> body ejected from the ejection tube in the enclosing member is discharged to the outside through the gap between the wiring board and the enclosure,
Prevents mist-like flux from entering.

Furthermore, since the spray port is applied over substantially the same length as the length of the blow-out tube, it is possible to prevent the mist-like flux from entering over the entire opening.

[0015] Further, it adheres to the side surface or the lower surface of the enclosing member.
Misty flux liquefied Te is atomized hula enclosing member
The dripping is promoted by a U-shaped or V-shaped cross section on the side to which the box is attached, or by a hanging cover having a similar cross-sectional shape. Moreover, Re flow <br/> of liquefied atomized fluxes becomes smoother.

[0016]

1 is a perspective view schematically showing an embodiment of the present invention. The same reference numerals as in FIG. 6 denote the same parts, and FIG. 1 shows an example of a spray type fluxer. Numeral 12 denotes a transport conveyor, which holds or places the wiring board 1 and transports it in the direction of arrow A by driving a motor 13.
Reference numeral 14 denotes a flux spray device, 15 denotes a spray nozzle, which is fixed to a slider 17 of an actuator 16, and is driven by a motor 19 through a chain 18 to drive the wiring board 1.
Reciprocating in the direction (arrow B direction) intersecting the transport direction (arrow A direction) of the above, sprays the flux 20 and applies it to the wiring board 1. 21 is unnecessary flux adhesion prevention equipment,
Electrode 2 (FIG. 1, the electrode 2 is the lower surface, i.e., atomized flux 20 is shown in two-dot chain line due to the surface to be coated.) Of the wiring substrate 1 misty flux 2 in the region 5 of the
In order to prevent zeros from adhering, a number of long surrounding members 22 having a U-shaped cross section are provided corresponding to the regions 5. An opening 23 is provided above the enclosing member 22, and the longitudinal direction thereof is attached in the same direction as the transport direction of the wiring board 1 (the direction of arrow A). It has become.

FIG. 2 is a side view showing the details of the unnecessary flux adhesion preventing device 21 shown in FIG. 1. The same reference numerals as those in FIG. 1 denote the same parts, and reference numeral 24 denotes an ejection pipe provided in the surrounding member 22. by jetting a gas material such as air or N ₂ gas from the ejection port 25 provided in the jet pipe 24, the electrodes 2 of the wiring substrate 1 held at a slight gap between the upper openings 23, fog So that the flux 20 in the form of a solid does not adhere. 26 air duct for blowing air body to the jet pipe 24, the support base for fixing attached to both longitudinal ends of the enclosing member 22 27, 28 the spray fluxer 11
A height adjustment device 31 that adjusts the height of the surrounding member 22 is provided between the base and the support 27. Reference numeral 32 denotes an upper screw rod, and 33 denotes a lower screw rod. Screws in opposite directions are formed, and each is screwed to a rotatable nut 34. The lower end of the lower screw rod 33 is a base 28. The lower screw rod 33 is fixed on the upper pedestal 35 by rotating the thumb screw 36.

The pedestal 35 is provided with a slit-like hole in its longitudinal direction (perpendicular to the plane of the drawing).
The fixing position of the lower screw rod 33, and thus the position of the unnecessary flux adhesion preventing device 21, can be arbitrarily determined along the slit-shaped hole.

[0019] 37 at the same time is the side of the enclosing member 22 also <br/> is to facilitate the dropping of the mist flux 20 which has been liquefied to adhere to the lower surface, to smooth the flow of flux 20 With a U-shaped cross-section
2 is detachable by a screw 38.

FIGS. 3A and 3B show the hanging cover 3 of FIG.
7A is a perspective view showing the shape of FIG. 7, in which FIG. 3A is formed in a U-shaped cross section and FIG. 3B is formed in a V-shaped acute angle section.

The cross section of the enclosing member 22 shown in FIG. 1 is not limited to the U-shape, and is similar to the hanging cover 37 shown in FIGS. 3 (a) and 3 (b). It may be formed at a V-shaped acute angle. Accordingly, in this case, the hanging cover 37 is not required for the surrounding member 22.

Next, the operation will be described. Wiring board 1
After being held or placed on the conveyor 12, FIG.
The flux 20 is conveyed in the direction of arrow A in FIG. 2, and the flux 20 is ejected from the spray nozzle 15 and the mist-like flux 20 is sprayed. At this time, the spray nozzle 15 reciprocates in the direction of arrow B in FIG. 1 by driving the actuator 16, and the wiring substrate 1 is coated with the mist-like flux 20 except for the portion of the electrode 2 covered with the surrounding member 22. You.

[0023] In addition, the jet pipe care of from the blower tube 26 24
Since jetted from the jetting port 25 is discharged from the gap between the opening 23 and the wiring substrate 1 to the outside, atomized flux 20
Can be prevented from adhering to the electrode 2.

The liquefied mist flux 20 adhered to the side surface or the lower surface of the surrounding member 22 is liquefied as shown in FIG.
As shown in (b), the hanging member 37 is attached to the surrounding member 22 by attaching a hanging cover 37 having a U-shaped or V-shaped cross section to the surrounding member 22 and by making the cross-section of the surrounding member 22 U-shaped or V-shaped. liquid out of the deposited by liquid turned into flux 20 is promoted. Further, the flow of the mist-like flux 20 becomes smooth, and the hanging cover 37 can be attached / detached, so that the cleaning operation of the hanging cover 37 becomes easy.

FIG. 4 is a cross-sectional view showing the mounting of the surrounding member 22 when the electrodes 2 of the wiring board 1 are formed on both surfaces of the wiring board 1, and the same reference numerals as those in FIG. The reason why the electrode 2 is also provided on the upper surface is to prevent the mist-like flux 20 flowing in the fluxer 11 from adhering to the electrode 2 around the upper surface. can do. Arrows C in the figure indicate the flow of air body.

Although the cross section of the surrounding member 22 is formed in a U-shape in FIG. 4, the cross section of the surrounding member 22 may be V-shaped.

FIG. 5 is an explanatory diagram showing a flow of the gas body you ejected from the ejection pipe 24, FIG. 2 designate the same parts, an arrow C in the figure indicate the flow of air body.

[0028]

As described above, the present invention provides a mist type
A surrounding member having an opening above the region for preventing the adhesion of the lux is provided , and gas is blown into the inside of the surrounding member.
Erupting pipes to prevent mist-like flux from entering
In addition to being able to completely block, the trouble of attaching the masking member, which has been conventionally performed, becomes unnecessary, so that the production cost can be reduced, the productivity can be improved, and
After peeling off the attached mask as in the conventional example using a mask, no adhesive remains on the electrodes etc.
This has the advantage that the reliability of the wiring board can be improved.

Further, ejection port for ejecting a gas body, because distributed over substantially the same length as the longitudinal length of the jet pipe, preventing the substantially entire region over the misty flux penetration openings Can be.

Further, the enclosing member has a U-shaped arc or a V-shaped acute angle formed on the side to which the mist-like flux adheres, and the enclosing member adheres to the outer side and lower surface thereof to liquefy. since atomized flux falling sagging cover Ru to promote the attached detachably to the lower surface of the enclosing member, atomized flat <br/> click scan of the liquid it has been turned into the liquid adhering to the enclosing member cutting is promoted, it has the advantage that contamination is eliminated enclosing member by mist fluxes adhesion of.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of the present invention.

FIG. 2 is a side view showing details of the unnecessary flux adhesion preventing device of FIG. 1;

FIG. 3 is a perspective view showing a shape of a hanging cover of FIG. 2;

FIG. 4 is a cross-sectional view illustrating attachment of a surrounding member.

FIG. 5 is an explanatory diagram showing fluxer the spray flow of the gas body you ejected from the ejection tube.

FIG. 6 is a plan view showing a conventional example in which a wiring board is masked.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wiring board 5 area 20 Flux 21 Unnecessary flux adhesion prevention device 22 Enclosure member 23 Opening 24 Spout tube 25 Spout port 37 Hanging cover

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-78593 (JP, A) JP-A-61-186165 (JP, A) JP-A-6-164128 (JP, A) 47769 (JP, U) Japanese Utility Model Application No. 58-83177 (JP, U) Japanese Utility Model Application No. 54-95533 (JP, U) Japanese Utility Model Application No. 2-79849 (Japanese Utility Model Application No. 4-39698) Microfilm photographing the contents of documents and drawings (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H05K 3/34

Claims (5)

(57) [Claims] 1. A mist of an apparatus used for more fluxing Engineering wiring substrate having a region to prevent adhesion of the flux, enclosing member having an opening that surrounds the area to prevent adhesion of the misty flux And the inside of the surrounding member
Equipped with an ejection pipe having an ejection port for ejecting gas
Unnecessary to wiring substrate in spray fluxer, wherein
Flux adhesion prevention device. Wherein jets, on the wiring board in the spray fluxer of claim, characterized in that formed distributed over substantially the same length as the longitudinal length of the jet pipe (1) Unnecessary flux adhesion prevention device. Wherein the enclosing members are side cross-section misty flux adheres to the wiring board in the spray fluxer of claim (1), characterized in that it is formed in a circular arc shape of the U-shaped Unnecessary flux adhesion prevention device. 4. A surrounding member, unnecessary side cross section misty flux adheres to the wiring board in the spray fluxer of claim (1), characterized in that it is formed at an acute angle of V-shaped Flux adhesion prevention device. 5. The enclosing member, <br/> order to promote the falling atomized flux liquefied adhered to the side and bottom of the outer arcuate or V of its cross section is U-shaped Sharp acute angle
The spray-type flux according to any one of claims (1) and (2) , wherein a hanging cover formed in a shape is detachably attached to a lower surface of the surrounding member.
A device for preventing unnecessary flux from adhering to the wiring board in the system.