JP2923915B2 - Reflow equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a reflow apparatus, and more particularly, to a nitrogen reflow soldering apparatus.

[0002]

2. Description of the Related Art In general, in a nitrogen reflow soldering apparatus, a substrate on which electronic components and the like are mounted is heated to melt the solder and solder the electronic components. , And nitrogen gas is supplied to the heating furnace.
In such a nitrogen reflow soldering apparatus, in order to prevent heat and nitrogen from leaking, the board is conveyed by the upper labyrinth and the lower labyrinth so as to sandwich the substrate from above and below.

There are various heights of electronic components mounted on a substrate, and in order to efficiently prevent heat and nitrogen leakage,
It is necessary to adjust the distance between the upper labyrinth and the lower labyrinth according to the height of the electronic component. That is, it is necessary to adjust the interval of the labyrinth composed of the upper labyrinth and the lower labyrinth according to the height of the electronic component.

A conventional nitrogen reflow soldering apparatus is provided with a line sensor, which detects the height of an electronic component. The control unit drives and controls the motor in accordance with the height detection signal from the line sensor to drive the entire upper labyrinth or lower labyrinth to adjust the distance between the substrate and the labyrinth.

[0005]

In a conventional nitrogen reflow soldering apparatus, the height of an electronic component is detected by a line sensor to adjust the distance between the substrate and the labyrinth, but one of the substrates is soldered. During processing, the labyrinth position will be set to the highest electronic component on one substrate. That is, when adjusting the position of the labyrinth with respect to one substrate, it is necessary to drive the entire labyrinth. As a result, there is a problem that heat and nitrogen leak from a portion corresponding to an electronic component having a low height.

An object of the present invention is to provide a reflow apparatus capable of reducing heat and nitrogen leakage and reducing energy consumption.

[0007]

According to the present invention, there is provided a reflow apparatus having a labyrinth having an inlet and an outlet and arranged so as to sandwich a substrate conveyed from the inlet to the outlet from above and below, wherein the labyrinth is Detecting means for obtaining a detection result by detecting the height of the substrate at a plurality of locations in the direction transverse to the labyrinth portion in a direction transverse to the transport direction of the substrate, There is provided a reflow apparatus comprising adjusting means for independently driving each of the labyrinth portions to adjust the positional relationship between the substrate and the labyrinth.

Further, according to the present invention, in a reflow apparatus having a labyrinth provided with an inlet and an outlet and arranged so as to sandwich a substrate conveyed from the inlet to the outlet from above and below, the labyrinth is provided for conveying the substrate. A first means for stopping the transfer of the substrate when the substrate comes to a predetermined position, a direction crossing the transfer path by moving a plurality of line sensors; Second means for detecting the height of the substrate for each of the line sensors and obtaining a detection result by arranging them at predetermined intervals along the line, and calculating a movement amount for each of the labyrinth portions according to the detection result A reflow device comprising a third means and a fourth means for adjusting the position of each labyrinth part according to the movement amount is obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

Referring to FIG. 1, the nitrogen reflow soldering apparatus has an inlet and an outlet (both not shown), and has a labyrinth arranged so as to sandwich a substrate conveyed from the inlet to the outlet from above and below. doing. The labyrinth includes an upper labyrinth 11 and a lower labyrinth (only the upper labyrinth 11 is shown in FIG. 1, but the lower labyrinth has the same configuration as the upper labyrinth 11),
A plurality of upper labyrinths 11 project from the movable plate 12 at a predetermined pitch. That is, the movable plate 1 is arranged at a predetermined pitch along the traveling direction of the substrate (not shown in FIG. 1).
2, a plurality of upper labyrinths 11 are protruded.

As shown in the figure, the movable plate 12 is divided into a plurality of plate portions 12a along the direction of travel of the substrate, and each upper labyrinth 11 corresponding to each plate portion 12a is perpendicular to the direction of travel of the substrate. The upper labyrinth portion 11a is divided in the direction.

Referring also to FIGS. 2 and 3, each plate 1
2a, a driving unit 13 is provided.
Reference numeral 3 includes a motor 13a, a transmission unit 13b, and a shaft 13c. In other words, the rotating body of the motor 13a is
Is attached, and a transmission portion 13b is attached to the shaft 13c. When the motor 13a rotates, the transmission unit 13
b moves up and down in the figure, whereby the upper labyrinth portion 11a can move up and down.

Referring to FIGS. 4 and 5, a substrate 15 on which electronic components 14 and the like are mounted is conveyed, and
At the position 6, the control unit (not shown) stops the transfer of the substrate 15. Next, the control unit controls the plurality of line sensors 17.
At a predetermined interval to a position crossing the transport path (the number of line sensors 17 is, for example, the upper labyrinth portion 11a
Eq .: step S1). Then, the height of the electronic component 14 or the like is detected by the line sensor 17 and sent to the control unit as height detection data. That is, the height of each location of the substrate 15 is detected by each line sensor 17 (step S2). In this detection, the height of the electronic component 14 and the like mounted on the upper and lower surfaces of the substrate 15 is detected.

The control section calculates the drive amount of each motor 13a according to each height detection data (step S3). Then, the control unit drives and controls each motor 13a according to each calculated drive amount (step S4). As a result, each upper labyrinth portion 11a is adjusted to a position corresponding to the height detection data. That is, each upper labyrinth portion 11a is independently adjusted in position according to the height of the electronic component 14 or the like.

As shown in FIG. 6, the lower labyrinth 18 is adjusted similarly to the upper labyrinth 11, and the lower labyrinth portion 18a is independently adjusted in position according to the height of the electronic component 14 or the like.

As a result, as shown in FIG. 6, the labyrinth can be adjusted according to the height of each electronic component, and the labyrinth is not set on the highest electronic component on the substrate. Since the labyrinth is adjusted according to the height of the electronic component, loss of heat and nitrogen can be reduced.

When the position adjustment of the labyrinth is completed in this way, the line sensor 17 is returned to the position where the labyrinth is lost, the substrate 15 is transported again, and soldering (production) is performed (step S5).

[0018]

As described above, in the present invention, the labyrinth is divided into a plurality of labyrinth portions, the height is detected for each location of the substrate, and the position of each labyrinth portion is determined according to the detection result. Since the adjustment is performed independently, it is possible to adjust the labyrinth optimal for the substrate,
As a result, there is an effect that loss of heat and nitrogen can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an example of an upper labyrinth used in a reflow device according to the present invention.

FIG. 2 is a diagram showing the upper labyrinth shown in FIG. 1 from the direction of arrow A.

FIG. 3 is a view showing the upper labyrinth shown in FIG. 1 from the direction of arrow B.

FIG. 4 is a diagram schematically showing a relationship between a substrate and a line sensor.

FIG. 5 is a flowchart for explaining the operation of the reflow device according to the present invention.

FIG. 6 is a diagram showing the relationship between the substrate and the labyrinth after the labyrinth adjustment in the reflow device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upper labyrinth 12 Movable plate 13 Drive part 14 Electronic component 15 Substrate 16 Stopper 17 Line sensor 18 Lower labyrinth

Claims (3)

(57) [Claims] 1. A reflow device having an inlet and an outlet, and having a labyrinth arranged so as to sandwich a substrate conveyed from the inlet to the outlet from above and below, wherein the labyrinth is a plurality of labyrinths in a direction crossing the substrate conveying direction. Detecting means for detecting the height of the substrate at a plurality of locations in the transverse direction to obtain a detection result, and independently driving each of the labyrinth parts in accordance with the detection result And an adjusting means for adjusting the positional relationship between the substrate and the labyrinth. 2. The reflow apparatus according to claim 1, wherein said detecting means has a plurality of line sensors arranged at predetermined intervals along said transverse direction. 3. A reflow apparatus having an entrance and an exit, and having a labyrinth arranged so as to sandwich a substrate conveyed from the entrance to the exit from above and below, wherein the labyrinth is a plurality of labyrinths in a direction transverse to the substrate conveyance direction. First means for stopping the transfer of the substrate when the substrate reaches a predetermined position, and a predetermined interval along a direction crossing the transfer path by moving a plurality of line sensors. A second means for detecting the height of the substrate for each line sensor to obtain a detection result, and a third means for calculating the amount of movement for each labyrinth part according to the detection result, A fourth means for adjusting a position of each of the labyrinth portions in accordance with the movement amount.