JPS62151268A - Vapor phase type soldering device - Google Patents

Abstract

PURPOSE:To reduce an outflow leakage vapor quantity by providing a conveyor frame whose interval can be adjusted in accordance with the change of the width size of a printed circuit board, and also providing an opening/closing plate for abutting on carrying-in port and carrying-out port parts. CONSTITUTION:A carrying conveyor 33 is provided between the carrying-in part 21 and the carrying-out part 22 of the printed circuit board, and also the conveyor frame of the conveyor 33 is installed so as to be freely slidable. Also, the opening/closing plate 82 is provided integrally with the conveyor frame, on the outside opening surface 81 of the carrying-in port and carrying-out port parts 21, 22, and also the opening/closing plate 82 is opened and closed by interlocking with the change of width of the conveyor frame. By following the change of the width size of the circuit board, the interval of the conveyor frame is adjusted by operating a handle, and also, by interlocking with it, the opening/closing plate 82 is moved and adjusted, and the leakage of vapor from the opening surface 81 is reduced. Accordingly, the leakage outflow quantity of an expensive vapor can be reduced.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a vapor phase soldering device that performs soldering using the latent heat of vaporization of the vapor phase. [Prior art] In general, a vapor phase soldering device transfers a printed wiring board and forms solder (1) between the printed wiring board and the 13 components in a steam tank. The mounted components are soldered to the printed circuit board by heating and melting the solder by the latent heat of vaporization. , said pudding 1-
Transport the wiring in the transport direction [1 part 1. Hot air tank, I3 J
: and trQ exit sections are sequentially provided. The loading entrance section 1
A cold 7JI coil is inserted inside the σ export port, and the vapor phase in the steam tank is installed in the central part of the cold 7JI coil (for J compression f1) to flow out to the outside. (Problems to be Solved by the Invention) However, the effect of the AFr IJI coil to prevent leakage from the steam tank is not perfect, and the loading inlet and outlet are connected to printed wiring. Since there is always an opening due to the continuous loading and unloading of V-boards, it is impossible to completely eliminate the vapor phase flowing out from this opening.However, this vapor phase is Since it is generated from an inert liquid, the cost of this inert liquid can be reduced (it is necessary to reduce the cost of this inert liquid). The purpose of the present invention is to prevent as much as possible the steam tank from flowing out from the loading inlet section and the unloading section. (Means for solving the problem) Mouth part 21, steam tank 11d
3 and the exit port 22 through the Fli! While conveying the printed IH board P using conveyor A733,
Interposed between this printed circuit board P and the mounted component W.

[J: Ribrint wiring! ! Solder the mounted parts W to &P (-J
This is related to the IJ Riru vapor phase soldering (1) device, in which the conveyor 33 is arranged in parallel and has a printed distribution P2 ] A7 conveyor frame 43, 44, a pair of endless chains 61 provided on both sides of the conveyor frame and driven synchronously, and a support part 75 that directly supports both sides, and the above-mentioned:]
The opening/closing JEt 82 integrally attached to the conveyor frame 4344 is connected to
It is installed so that it can be opened and closed freely while in contact with the outer frontage surface 81 of the door. [Function] In the present invention, when the printer 1 to the wiring board P are small, the pair of conveyor frames 43, 44 are moved closer to each other, and the distance between the pair of endless 71261 is adjusted to be narrowed. The opening/closing plate 82 provided integrally with the conveyor frames 43 and 44 is also connected to the conveyor frames 43 and 44.
and move toward each other, and the entrance portion 21
Then, a part of the outer frontage surface 81 of the outlet section 22 is closed to reduce the amount of air flowing out from the frontage surface 81 to the outside. (Example) The present invention is not shown in the drawings, but with reference to an example, 2TaI
Explain. Figure 1 shows a gas-phase type mandrel device.
A steam tank 11 of 5Ω is installed inside the 0, and an inner (f912) is installed at the bottom of the second air tank 11. A heater 14 is installed inside the tank (F), and a fluorine fiber inert fI solvent 1 is installed in the inner tank 12.
5 and 6, glypirin and A are stored in the outer tank 13.
114 The reason why the heat input medium 16 is combined with the heat input medium 16 is due to the uneven heating of the solvent 15. Prevent 11
This is to uniformly apply the solvent 15 to the entire surface, and if the heater 14 is installed in the solvent 15, dust etc. may adhere to the heater 14, causing uneven heating. When this happens, toxic gas and metal corrosive substances are generated from the solvent portion that is heated intensively, so in order to prevent this, a 1 g heating method was used. Further, a carry-in port 21 is installed on one side of the steam tank 11, and a carry-in port 22 is provided on the other side. A coil 23 is provided to condense the steam tank. Also, inside the device body 10, the loading/unloading/exit portion 21° 22
a recovery unit 24 that forcibly sucks the solvent vapor tank that flows out from the opening of the inner tank 12, recovers the solvent, and returns it to the inner tank 12; The filtering units 1 to 25 that return to 2, the control box 26, and the four 1-reheaters 27 are arranged. As shown in FIG. 2, the upper surface of both ends of the Hn main body 10 is cut out to form a pudding mill wiring board loading section 31 and a pudding 1.
- a wiring board carry-out section 32, and an m-transfer conveyor A733 for conveying the pudding 1 - wiring boards from the carrying-in section 31 to the carrying-out section 32. This conveyor 33 is the first
The pre-heater 2 is arranged vertically as shown in the figure.
7, and further through the carrying-in port 21, the steam tank 11, and the carrying-out port 22. As shown in FIG. 3, the slide portion 4 is moved to the conveyance competition 733 with respect to the fixedly installed slide guide 41.
2, the left and right conveyor frames 43 and 44 are provided so as to be movable in the approaching and separating directions, respectively.
A drive shaft 46 supported by the rotatable body 1 by a pair of bearings 45 is inserted into the end of the shaft 3.44 so as to be rotatable and slidable in the axial direction. The drive shaft 46 is provided with a pair of drive sprockets 47 that rotate integrally within the ends of each conveyor frame 43,44. Each drive sprocket 41 is connected to a conveyor frame 43 in the axial direction with respect to the drive shaft 46.
．． Move with 44. The rotation of the drive motor 48 is then transmitted to one end of the drive shaft 46 via the chain transmission mechanism 49. Further, one threaded rod 51 rotatably supported by bearings (not shown) is screwed into the female threaded portion 52 of the conveyor frame 43 on one side, and then the conveyor frame 4 on the other side is screwed.
4 through the insertion hole 53, and screw the other threaded rod 54 supported by the rotating shaft (j) into the female threaded portion 55 of the conveyor frame 44 on the other side by means of a bearing (not shown).
Ru. and celebrity] Shini 51. ! i4 to 1217 to 11
The matching gears 56 and 57 are integrally bji i L/,
The left and right conveyor frames 43, 44 are rotated by rotating one screw rod 1) 1 in one direction and turning the other screw rod 54 in the other direction using the handle 58 provided on the screw rod 51 of No. 13. moves in the direction approaching or in the direction of resistance, and competition N? Frame 43.
44 width adjustment is made. The width adjustment of one end side of the conveyor frame 43.44 is performed mainly by the two threaded rods 51.54. ! By interlocking the rotation of the threaded rods 54 on both end sides with the jin transmission mechanism 59, both ends of the conveyor frames 43 and 44 are equally spaced by one width, and the conveyor frame 43 .44 should always be kept parallel. Such a pair of left and right conveyor frames 4 whose width is adjustable
A pair of left and right endless chains 61 which are rotated in synchronization with each other are provided in parallel inside the 3.44. This endless chain G1 is
It is wound from the driving sprocket 47 to the driven sprocket 62 shown in FIG.
3. Avoid approaching the upper part by 64. As shown in FIG. 4, the pair of left and right endless chains 61
is the conveyor frame 43.4. There is a roller chain C whose movement is guided by a guide rail 12 provided on an angle member 71 with a mounting number on this frame. It is integrally molded, and directly supports the left and right sides of the printed wiring board P on the upper surface of the tips 7G of the plurality of support parts 75 located on both the left and right sides, and is further screwed onto each support part 75 to protrude. Both the left and right sides of the printed wiring board 1] are regulated by the screws 11 that have been set. This print arrangement I! Mounting components W such as surface-mounted integrated circuits are mounted on the upper and lower surfaces of the i1 board P. This mounting component W has its main package mounted on a printed FA CL board P using an adhesive, and cream solder S applied to the board surface by a dispenser is interposed between the leads and the board P. Furthermore, as shown in FIGS. 1 and 2, opening and closing plates 8
2 are each digitized by :Ω. This opening/closing plate 82 is as shown in FIG.
2 is integrally attached to the conveyor frame 113.44 via a welded mounting plate 83, and as shown in FIG. The frame 43.
With the width adjustment of 44, the opening is moved. Next, in order to explain the operation of this embodiment, when the component mounting plate P is supplied on the support part 75 of the left G endless chain 1 61 and between the screws 77 at the insertion part 31, this component mounting JJ doctor P is carried into the inside of the apparatus main body 10 for transporting the endless die 61, first heated by the sub-heater 27, and then heated by the indirect heating method in the 2L air tank 11.
14 The fluorine-based inert solvent vaporized and formed on the solution l'11115 passes through the inside of the rapid vapor phase +5a, and at this stage...
The steam tank 15a is heated to approximately 215°C due to the latent heat of vaporization, and as a result of this heating, i) is
/JX melted parts W mounted on printed Au board P
Lead L/) (is soldered. When this component 1 is soldered), the board P is taken out. When the width dimension of the cover plate P is changed, rotate the handle 58 on the outside of the device main body 10 to move the left and right conveyor frames 43, 44J3 and the endless chain 61 in the same direction.
I to adjust the movement in the width direction, and adjust the distance between the left and right endless boobies 1261 by changing the angle. When the conveyor frames 43 and 44 are moved in the width direction, the entrance portion 21. T3 and the four opening/closing plates 82 provided on the outer opening surface 81 of the outlet section 22 are also moved at the same time. For example, when the interval between the conveyor frames 43, 44 is narrowed, the opening/closing plates 82 move to the outer opening surface 81. Since the opening area of this opening surface 81 becomes smaller, the outer side 11' of the loading port 21 and the loading port 22 is closed.
The amount of steam flowing out from the I-port 81 is also reduced. [Effects of the Invention] According to the present invention, there is a slot loading port a on both sides of the hot air tank.
3 and is integrally attached to the conveyor frame at the outer opening surface of the carrying-in port 43 and the carrying-out port. Therefore, the opening area of the opening surface can be reduced in accordance with the width adjustment of the conveyor frame, and the amount of expensive steam generated in the steam tank escaping to the outside can be reduced.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the vapor phase soldering device of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is its l! !
FIG. 4 is a perspective view of the two-feed conveyor, FIG. 4 is a sectional view thereof, and FIG. 5 is a perspective view of the outer opening surface of the carry-in port. P...Printed wiring board, W...Mounted parts, S...Solder, 11...Steam tank, 15a...Steam tank, 21...Carry-in port, 22...Carry-out port, 33...Transport conveyor, 4
3.44...Conveyor frame, 61...Endless 1-r
75... Support part, 81... Outer opening surface, 82... 1! i'l tentative.

Claims (1)

[Claims] (1) While the printed wiring board is being transported by a conveyor that is disposed through a loading port, a steam tank, and a loading port that are sequentially provided, the solder interposed between the printed wiring board and the mounted components is removed by the steam. In a vapor phase soldering apparatus that solders mounted components to a printed wiring board by heating and melting them using the latent heat of vaporization of a vapor phase formed in a tank, the conveyor is arranged in parallel to solder the printed wiring board. A conveyor frame on both sides whose spacing can be adjusted according to changes in the width dimension, a pair of endless chains installed on the conveyor frames on both sides and driven synchronously, and a printed wiring board installed over the entire length of the pair of endless chains. an opening/closing plate that is integrally attached to the conveyor frame at the outer opening surface of the carry-in port and the carry-out port; A vapor phase soldering device characterized by being provided so as to be able to be opened and closed while in contact with an opening surface.