JPH0563665U - Fracsa - Google Patents

Abstract

(57) [Summary] [Purpose] A fluxer that efficiently coats a printed circuit board with a mist-like flux to prevent the inside of the fluxer from being contaminated by the mist-like flux, and that enables the use of a compact, low-power dust collector. To get [Structure] Mist-like flux 1 ejected from a nozzle 24
3, a housing 22 provided with a flux spraying device 23 for applying the lower surface of the printed circuit board 1 to the hood 14, and the duct 1.
6 and a collector 30 are provided, and an opening 29 as an outside air supply means for taking in outside air for increasing the amount of the atomized flux 13 remaining inside the fluxer 2 to be collected by the collector 30 is provided as a flux. Nozzle 2 of spraying device 23
It is provided at a position lower than 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluxer that efficiently collects a mist-like flux ejected from a nozzle without retaining it inside.

[0002]

[Prior Art]

 FIG. 2 is a side cross-sectional view showing an example of a conventional fluxer, and 1 is a printed circuit board on which electronic components (not shown) and the like are temporarily attached and conveyed on the traveling level L in the direction of arrow A. 2 shows the whole flexor. 3 is a carry-in conveyor for carrying in the printed circuit board 1 into the fluxer 2, 4 is a carry-out conveyor for carrying out the printed circuit board 1 from the fluxer 2 to the outside, 5 is a carrier chain for carrying the printed circuit board 1, and 6 is Holding claws for holding the printed circuit board 1, 7 for a chain guide, 8 for a flux tank constituting the fluxer 2, 9 for an outer tank, 10 for an inner tank, 11 for a flux spray device, 12 for the flux spray device. 11 is a nozzle, 13 is a mist-like flux ejected upward from the nozzle 12, 14 is a hood that collects the mist-like flux 13, and is provided above the traveling level L of the printed circuit board 1. .. Reference numeral 15 is a hood cover, 16 is an exhaust duct for discharging the mist-like flux 13 in the hood 14 and the hood cover 15, 17 is a collector provided in the duct 16, and 18 is the printed circuit board 1 A carry-in port, 19 is a carry-out port, 20 is a tray, and 13A is a liquid flux in which the atomized flux 13 is stored in the tray 20 by dropping. Although not shown, an air device unit for operating the flux spraying device 11 and a pipe section are provided inside the inner tank 10.

Next, the operation will be described. The printed circuit board 1 is placed on the carry-in conveyor 3 and conveyed in the direction of arrow A. After entering the flux 2, the printed circuit board 1 is transferred to the holding claws 6 of the conveying chain 5 and held and conveyed. Next, the lower surface of the printed circuit board 1 is coated with the atomized flux 13 ejected from the nozzle 12 of the flux spraying device 11. Further, since the flux spraying device 11 is adapted to reciprocate in the direction perpendicular to the conveying direction of the printed circuit board 1 (direction of arrow A), it is applied over the entire lower surface of the printed circuit board 1. Next, the printed circuit board 1 coated with the atomized flux 13 is conveyed in the direction of the arrow A, separated from the holding claws 6, transferred to the carry-out conveyor 4, and carried out to the outside. On the other hand, the atomized flux 13 remaining after being applied to the printed circuit board 1 is collected from the inside of the hood 14 to the duct 16 by the collector 17 through a filter (not shown) as shown in the arrow B direction. Further, the dust collector 17 collects the mist-like flux 13, and the outside air is taken in through the carry-in port 18 and the discharge port 19 as shown by an arrow C. The mist-like flux 13 that cannot be completely recovered from the flux 2 is dripped and stored in the tray 20 and collected as a liquid flux 13A.

[0004]

[Problems to be solved by the device]

 By the way, since the conventional fluxer 2 is configured as described above, in order to collect the atomized flux 13 remaining without being applied to the printed circuit board 1 by the dust collector 17, it corresponds to the size of the hood 14. It is necessary to suck in a large amount of outside air, but in the conventional fluxer 2, the intake of outside air is only the carry-in port 18 and the carry-out port 19 of the printed circuit board 1, and the mist-like flux 13 is contained in the hood 14. The amount of outside air taken in to collect the mist-like flux 13 in the hood 14 is insufficient because the amount of outside air that stays in the vicinity of the nozzle 12 cannot be taken in only by the carry-in inlet 18 and the carry-out outlet 19. Was. Further, the carry-in port 18 and the carry-out port 19 are required to be as small as possible in order to prevent the atomized flux 13 from flowing out of the flux 2 and a good outside air flow cannot be obtained. Therefore, the amount of the mist-like flux 13 staying in the hood 14 increases, and the carrier chain 5, the holding claws 6, the chain guide 7, the flux tank 8 and the hood 14 on the upper surface of the printed circuit board 1 and inside the fluxer 2 are hood 14. Since the mist-like flux 13 adheres to and pollutes the inner wall surface of the, the cleaning of the inside of the fluxer 2 is troublesome. Further, in order to take in a large amount of outside air, there is a problem that a large dust collector 17 having an output more than necessary must be attached. Therefore, even if the outside air is taken in from the flux tank 8 other than the carry-in port 18 and the carry-out port 19, the outer tank 9 and the inner tank 10 are integrally formed, and therefore the outside air is taken into the flux tank 8. There is a problem that the opening as a supply means cannot be formed.

The present invention has been made in order to solve the above problems, and efficiently coats a printed circuit board with a mist-like flux to prevent the inside of the fluxer from being contaminated by the retention of the mist-like flux. It is an object of the present invention to provide a fluxer that is capable of preventing and using a compactor with a smaller output and a lower output than a conventional collector.

[0006]

[Means for Solving the Problems]

 In the fluxer according to the present invention, the outside air supply means for taking in the outside air for increasing the amount of the mist-like flux remaining in the hood collected by the collector is located below the nozzle of the flux spraying device. It is provided.

[0007]

[Action]

 In the present invention, since a large amount of outside air is taken in from the outside air supply means formed in the housing, the accumulation of mist-like flux is prevented, the outside air flow in the hood is kept good, and the wind speed is increased. The atomized flux can be reliably collected.

[0008]

【Example】

 1 is a side sectional view showing an embodiment of the present invention, in which the same reference numerals as those in FIG. 2 designate the same parts, and 21 designates the entire fluxer. 22 is a housing provided below the fluxer 21, 23 is a flux spraying device provided in the housing 22, 24 is a nozzle, 25 is an air equipment unit of the flux spraying device 23 provided in the housing 22. It is connected to the flux spraying device 23 through a pipe (not shown). 26 is an operation panel provided in the housing 22, 27 is the entire hood cover, 27A is an upper cover, 27B is above the housing 22, and faces the hood cover 27A and is above the housing 22. It is provided below the traveling level L of the printed circuit board 1. Further, the hood cover 27 is detachably formed integrally with the upper cover 27A and the lower cover 27B. Further, the flux spraying device 23 is attached to the hood cover 27B in a suspended state. Reference numeral 28 denotes a space portion formed between the air device unit 25 in the housing 22 and the operation panel 26, and 29 denotes an opening portion formed on the bottom surface of the space portion 28 as an outside air supply means. Incidentally, 29A is an opening formed on the side surface of the space 28 instead of the opening 29 formed on the bottom of the space 28, and its position is shown by a chain double-dashed line in the figure. 30 is a dust collector.

Next, the operation will be described. The conveyance of the printed circuit board 1 and the application of the atomized flux 13 are the same as in the conventional case, but in the present invention, a large amount of outside air is directed in the direction of arrow D from the opening 29 to the inside of the space 28 by the dust collector 30. Are taken and sent to the inside of the hood 14. On the other hand, outside air is taken in through the carry-in port 18 and the carry-out port 19 as shown by arrow C, as in the conventional case. Therefore, even if the output of the dust collector 30 is smaller than that of the conventional dust collector 17, the discharge amount of the mist-like flux 13 increases, so that the mist-like flux 13 remaining inside the flux 21 does not stay, The inside of the flexor 21 can be prevented from being contaminated.

A similar effect can be obtained by providing a fan (not shown) for introducing outside air in the opening 29. Further, since the flux spraying device 23 is attached to the hood cover 27 in a suspended manner, it is not necessary to provide an inner tank as in the conventional case, and the space between the flux spraying device 23 and the air equipment unit 25 should be as close as possible. Therefore, the piping (not shown) between the flux spraying device 23 and the air equipment unit 25 can be easily formed.

[0011]

[Effect of the device]

 As described above, in the present invention, the outside air supply means for taking in the outside air for increasing the amount of the mist-like flux remaining in the hood collected by the collector is provided below the nozzle of the flux spraying device. Since it is installed in the position, the flow of the outside air around the nozzle becomes smooth, and the retention of the mist-like flux remaining in the hood inside the flux is eliminated, the contamination inside the flux is eliminated, and the labor required for cleaning is eliminated. It can be reduced. In addition, it has the advantage of being able to efficiently collect the mist-like flux even if it is smaller and has lower output than the conventional dust collector.

[Brief description of drawings]

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

FIG. 2 is a side sectional view showing an example of a conventional fluxer.

[Explanation of symbols]

 1 Printed Circuit Board 13 Fog in Flux 14 Hood 16 Duct 21 Fluxer 22 Enclosure 23 Flux Sprayer 24 Nozzle 27 Hood Cover 28 Space 29 Opening 30 Harvester

Claims (1)

[Scope of utility model registration request] 1. A housing provided with a flux spraying device for applying a mist-like flux ejected from a nozzle to a lower surface of a printed circuit board, a hood provided above a traveling level of the printed circuit board, and a hood provided in the hood. In a fluxer consisting of a dust collector provided in the duct for collecting the remaining mist-like flux, the outside air for increasing the amount of the mist-like flux remaining in the hood collected by the dust collector A fluxer characterized in that an outside air supply means for taking in is provided at a position below the nozzle of the flux spraying device.