JPH10193094A - Device for coating flux - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and uniformly coat flux on one side surface of a plate-like metallic material, to facilitate the control of coating quantity and to simplify the process control. SOLUTION: A device for continuously coating the flux on the plate-like aluminum material A, is constituted with an application roll 101 and a back-up roll 102 arranged so as to interpose the plate-like aluminum material A from both upper and lower surfaces, a tank 104 incorporating flux suspended solution 103 and a pick-up roll 105 dipped into the flux suspended solution 103 in the tank 104 at a part thereof and supplying the flux suspended solution 103 to the application roll 101. In such a case, at least one or more of transfer rolls 106, 107 are interposed between the pick-up roll 105 and the application roll 101. The pick-up roll 105, application roll 101 and transfer rolls 106, 107 are rotated in the arbitrary direction to each without relating to the other roll contacting with each roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously applying a flux to one surface of a plate-like metal material which is brazed and used, for example, in a capacitor, an evaporator, an oil cooler or the like used for an automobile. In this specification, the term “aluminum” includes an aluminum alloy in addition to pure aluminum.

[0002]

2. Description of the Related Art Metal materials,
For example, as a method of applying a brazing flux to an aluminum material, generally, a dipping method, a shower spraying method, or an electrostatic coating method is widely used, and any of the methods is applied to a plate-like aluminum material. However, when the flux is applied only to one surface of the plate-shaped aluminum material, it is necessary to mask the non-application surface, and there is a problem that the operation is troublesome. In addition, there is a problem that it is difficult to control the amount of application in any of the methods and the process management is also difficult, and it is not possible to apply the coating uniformly and evenly. Moreover, since it is difficult to control the amount of coating by any of the methods,
Excessive flux is inevitably applied to prevent the uncoated portion from being present, and there is a problem that the amount of used flux increases and the cost increases. Further, if an excessive flux is applied, the amount of adhering moisture increases, and there is a problem that it takes time to dry in a subsequent process.

As a method of applying a flux to only one surface of a plate-shaped aluminum material, there is an unusual method, but an automatic brush coating method. However, this method also has a problem that it is difficult to control the amount of application, and furthermore, the brush is deteriorated, the hair falls off, adheres to the plate-shaped aluminum material, and impairs the brazing property. In addition, even with this method, there is a problem that the coating cannot be performed uniformly.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to apply a flux to one surface of a plate-shaped metal material easily, to easily control the amount of application, to simplify the process control, and to uniformly apply the flux. It is an object of the present invention to provide a flux coating device capable of performing the above.

[0005]

Means for Solving the Problems and Effects of the Invention A flux coating apparatus according to the present invention is an apparatus for continuously applying a flux to a sheet metal material, and is arranged so as to sandwich the sheet metal material from both sides. Application roll and backup roll, a tank for holding the flux suspension, and a pickup roll for partially immersing the flux suspension in the tank and supplying the flux suspension to the application roll. And the application roll rotates in an arbitrary direction.

[0006] In the above, the flux to be applied is K _n Al when the plate-like metal material is made of aluminum.
F n _{+ 3} (where n is a natural number.), A mixture of KF and AlF _3, the fluoride-based flux such as fluoroaluminate potassium phosphate complex alone, or used as a mixture thereof. The particle size of such a flux is from 1 to 100
The particle size distribution is preferably μm. In addition, the application of the flux is performed by applying a flux suspension obtained by suspending the above-mentioned flux in water to a plate-shaped metal material and then drying it.

According to the flux coating apparatus of the present invention,
An application roll and a backup roll arranged so as to sandwich the plate-shaped metal material from both sides, a tank for holding the flux suspension, a part of which is immersed in the flux suspension in the tank, and Supply the flux suspension in the tank to the application roll by the pickup roll, and apply the flux suspension to one side of the sheet metal material by the application roll. Therefore, it is not necessary to apply masking to the non-applied surface, and the operation is simplified. Also,
Since the flux suspension is applied to the plate-like metal material by the application roll, it can be applied uniformly and evenly. In addition, since it is applied only to one side of the sheet metal material that is required, the appearance after brazing this sheet metal material is beautiful, and there is no extra flux, so the weight of the brazed product is reduced. Can be achieved. In addition, there is no hindrance to brazing unlike the conventional automatic brush coating method.

Further, since the application roll is configured to rotate in an arbitrary direction, the amount of application can be reduced by setting the rotation direction to the same direction as the traveling direction of the sheet metal material. The application amount can be increased by setting the direction to the direction opposite to the traveling direction of the sheet metal material. As a result, the application amount can be easily controlled and the process management can be simplified. In addition, the amount of application can be minimized, the amount of flux used is reduced, and the cost is reduced. Further, by minimizing the amount of application, the amount of adhering water is also reduced, and the time required for drying in the subsequent process is reduced. In addition, the film thickness of the coating film can be increased by setting the rotation direction of the application roll opposite to the direction in which the plate-shaped metal material advances.

In the flux coating apparatus of the present invention,
In some cases, the pickup roll and the application roll are in direct contact, and the two rolls are configured to rotate in an arbitrary direction regardless of the rotation directions of the other rolls. In this case, when the pickup roll and the application roll are rotated in opposite directions, the supply amount of the flux suspension from the pickup roll to the application roll decreases, and when the pickup roll is rotated in the same direction, the supply amount increases. This also makes it possible to control the amount of applied flux.

[0010] In the flux coating apparatus of the present invention, at least one or more transfer rolls are interposed between the pickup roll and the application roll, and the pickup roll, the application roll and the transfer roll are each provided with another roll. In some cases, the rotation is performed in an arbitrary direction regardless of the rotation direction. In this case, when the two adjacent rolls are rotated in opposite directions, the amount of flux suspension transferred between the two rolls is reduced, and when the two adjacent rolls are also rotated in the same direction, the flow between the two rolls is reduced. The delivery amount of the flux suspension increases. Therefore, by appropriately combining the rotation directions of the rolls, it is possible to adjust the supply amount of the flux suspension to the application rolls, thereby controlling the flux application amount.

In the above-described device in which the pickup roll and the application roll are in direct contact with each other, and in the device in which at least one or more transfer rolls are interposed between the pickup roll and the application roll, the two rolls in contact with each other It is preferable that one of them is made of metal and the other is made of rubber.
In this case, the amount of wear of the rolls is smaller than when all the rolls are made of metal. As the metal roll, a roll made of stainless steel, for example, and the surface thereof is plated with chrome is used. As the rubber roll, a roll made of, for example, hard rubber is used. The surface hardness of the metal roll is preferably 50 or more in Rockwell B hardness, and the surface roughness is 30 μm in center line average roughness Ra.
m or less.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the device according to the present invention.

In FIG. 1, a flux coating device (100)
Is to apply the flux only to the upper surface of the plate-shaped aluminum material (A) (plate-shaped metal material). The application roll (101) and the application roll (101) which are arranged so as to sandwich the plate-shaped aluminum material (A) from both upper and lower surfaces Backup Roll (102)
And a tank (104) for holding the flux suspension (103)
And a pickup roll (105) partly immersed in the flux suspension (103) in the tank (104) and supplying the flux suspension (103) to the application roll (101).
And

At least one or more, in this embodiment, two transfer rolls (106) and (107) are interposed between the pickup roll (105) and the application roll (101). Then, the pickup roll (105) and the first transfer roll (106), the adjacent first and second transfer rolls (106) and (107), and the second transfer roll (107) and the application roll (101). And contact each other. Here, the pickup roll (105) and the second transfer roll (107) are each made of metal,
The transfer roll (106) and the application roll (101) are each made of rubber.

A pickup roll (105), an application roll (101) and two transfer rolls (1)
06) and (107) are designed to rotate in arbitrary directions irrespective of the rotation direction of the other rolls in contact with them. In this embodiment, each roll (105) (101) (106) (107)
Rotates in the direction indicated by the arrow. That is, a pickup roll (105), an application roll (101) and two transfer rolls (106) (107)
Rotate in the same direction, and the application roll (1
01) rotates in the direction opposite to the direction of travel of the aluminum plate (A), so that the aluminum plate (A)
The amount of the flux suspension applied to the coating increases. In addition,
The backup roll (102) rotates in the same direction as the traveling direction of the plate-shaped aluminum material (A) as shown by the arrow.

In such a configuration, the plate-like aluminum material (A) passes between the application roll (101) and the backup roll (102) by a pair of feed rolls (108), and moves to the right in FIG. Sent continuously. The flux suspension (103) wound up from the tank (104) by the pickup roll (105) is sent to the application roll (101) via two transfer rolls (106) (107), and is sent to the application roll (101). It is applied on the upper surface of the plate-like aluminum material (A).

When the plate-shaped aluminum material (A) is a flat plate as a whole, the peripheral surface of the application roll (101) and the peripheral surface of the backup roll (102) are each entirely cylindrical.

As shown in FIG. 2, a plate-like aluminum material
If (A) is not a flat plate as a whole, but an irregularly shaped product consisting of a flat plate-like portion (a) and a rising wall (b) integrally formed on both side edges, the application roll (101)
In the middle of the length of the peripheral surface of the plate, an axial length equal to the distance between the upstanding walls (b) of the plate-shaped aluminum material (A) and a protruding height equal to the height of the upstanding walls (b) shall be provided. Having a cylindrical surface, in other words, a rising wall
(b) An annular ridge (109) that fits between and is in surface contact with the entire upper surface of the plate-shaped portion (a) is formed over the entire circumference. An annular groove (110) into which the plate-shaped aluminum material (A) fits is formed all around the middle of the length of the peripheral surface of the backup roll (102).

FIG. 3 shows a second embodiment of the device according to the present invention.

In FIG. 3, a flux coating device (111)
Is to apply the flux only to the lower surface of the plate-shaped aluminum material (A), and the application roll (112) and the backup roll () are disposed so as to sandwich the plate-shaped aluminum material (A) from the lower surface side and the upper surface side. 113) and a pick-up roll (114) that is in direct contact with the application roll (112). Pickup roll (1
14) As in the case of the first embodiment,
It is immersed in the flux suspension (103) in (104).

Here, the pickup roll (114) is made of metal, and the application roll (112) is made of rubber.

The pickup roll (114) and the application roll (112) are configured to rotate in any directions regardless of the rotation directions of the other rolls. In this embodiment, each of the rolls (114) (112) rotates in the direction indicated by the arrow. That is, the pickup roll (114) and the application roll (11
2) rotate in the same direction, and the application roll (112) rotates in the direction opposite to the traveling direction of the aluminum plate (A).
The amount of the flux suspension applied to (A) increases. The backup roll (113) rotates in the same direction as the traveling direction of the plate-shaped aluminum material (A) as shown by the arrow.

In such a configuration, the plate-like aluminum material (A) passes between the application roll (112) and the backup roll (113) by a pair of feed rolls (108), and moves to the right in FIG. Sent continuously. The flux suspension (103) wound up from the tank (104) by the pickup roll (114) is applied to the application roll (11).
2) and is applied to the lower surface of the plate-like aluminum material (A) by the application roll (112).

When the plate-shaped aluminum material (A) is a flat plate as a whole, the peripheral surface of the application roll (112) and the peripheral surface of the backup roll (113) are each entirely cylindrical.

As shown in FIG. 4, a plate-like aluminum material
If (A) is not a flat plate as a whole but an irregularly shaped product consisting of a flat plate-shaped part (a1) and a hanging wall (b1) integrally formed on both side edges, the application roll (112) In the middle part of the length of the peripheral surface of the plate-shaped aluminum material, it has an axial length equal to the distance between the two hanging walls (b1) of the plate-shaped aluminum material (A) and a projecting height equal to the height of the both hanging walls, and An annular ridge (115) that has a cylindrical surface, in other words, fits between both hanging walls (b1) and is in surface contact with the entire lower surface of the plate-shaped portion (a1) is formed over the entire circumference. Also, backup roll
In the middle of the length of the peripheral surface of (113),
An annular groove (116) into which (A) fits is formed over the entire circumference.

Hereinafter, a specific plate-like metal material to which a flux is applied by the apparatus of the present invention will be described.

FIG. 5 shows a condenser provided with a flat aluminum pipe made of two aluminum components which are coated with a flux and brazed after being applied by the apparatus of the present invention, and FIG. FIG. 7 shows a flat tube constituting a tube, and FIG. 7 shows upper and lower components constituting the flat tube.

In FIG. 5, the condenser has an inlet header (1) and an outlet header (2) arranged parallel to each other at a distance from each other, and both ends are connected to both headers (1) and (2), respectively. Aluminum corrugated fins (3) are placed in the ventilation gap between the parallel flat refrigerant flow pipes (3) and the adjacent refrigerant flow pipes (3), and brazed to both refrigerant flow pipes (3). 4), an inlet pipe (5) connected to the upper end of the peripheral wall of the inlet header (1), and an outlet pipe (6) connected to the lower end of the peripheral wall of the outlet header (2). ) Flows into the inlet header (1), flows into the refrigerant flow pipes (3), flows rightward, reaches the outlet header (2), and reaches the outlet header.
(6) It flows out in a more liquid phase.

As shown in FIG. 6, the refrigerant flow pipe (3) is made up of flat upper and lower walls (7) and (8), and a left and right side of a double structure spanning the left and right edges of the upper and lower walls (7) and (8). Wall (9) (10) and left and right side walls (9)
(10) a plurality of reinforcing walls (11) extending over the upper and lower walls (7) and (8) and extending in the longitudinal direction and provided at a predetermined interval from each other, and a fluid passage parallel to the inside thereof. It consists of an aluminum flat tube (T1) having (12). Flat tube (T1)
The lower wall (8), the left and right side walls (9) (10) and the aluminum plate-shaped lower component (13) constituting the reinforcing wall (11), and the upper wall
(7) and an aluminum plate-shaped upper component (14) constituting the left and right side walls (9) and (10).

The left and right side walls (9) and (10) have a hanging wall (15) formed integrally with the left and right side edges of the upper wall (7) and a rising part formed integrally with the left and right side edges of the lower wall (8). The wall (16) and the hanging wall (15)
Are brazed to each other in an overlapping state so that they are on the outside. The lower end of the hanging wall (15) is the lower wall
(8) It extends downward and is bent inward to form the inclined surface (1) formed on the left and right side edges of the lower surface of the lower wall (2).
7) is engaged and brazed.

The reinforcing wall (11) is formed by joining a reinforcing wall forming portion (18) integrally formed with the lower wall (8) to the inner surface of the upper wall (7). In the reinforcing wall (11), parallel fluid passages
(12) There are a plurality of communication holes (19) through which each other passes. The communication holes (19) are arranged in a zigzag pattern when viewed from a plane. If the communication hole (19) is drilled, the fluid passage
The fluid flowing through each (12) flows in the width direction of the flat tube (T1) through the communication hole (19), is mixed over all the fluid passages (12), and is mixed with the fluid between the fluid passages (12). No difference is made. Therefore, the heat exchange efficiency is improved. The communication hole (19) is formed by notches (20) formed at predetermined intervals on the upper edge of the reinforcing wall forming portion (18), the opening of which is closed by the upper wall (7). Things. In this case, since the communication holes (19) formed in the plurality of reinforcing walls (11) are staggered when viewed from the plane, the two constituent members (13) (14) are arranged in the width direction of the flat tube (T1). ) Since there is a joint between the two, sufficient joint strength is secured.

The flat tube (T1) constituting the refrigerant flow tube (3)
Is a plate-shaped lower aluminum component as shown in FIG.
It is manufactured by fitting and brazing the upper component member (14) made of aluminum, also in the form of a plate.

The lower component (13) comprises a flat lower wall forming part (21).
The rising wall (16) integrally formed on both side edges of the lower wall forming portion (21) and the rising wall (16) of the lower wall forming portion (13) in a rising shape and at a predetermined interval from each other. And a plurality of reinforcing wall forming portions (18) extending integrally in the longitudinal direction, and a trapezoidal cut is formed on the upper edge of the reinforcing wall forming portion (18) at predetermined intervals in the length direction. The notches (20) are formed in a staggered arrangement when viewed from a plane. An inclined surface (17) that is inclined upward and outward in the left-right direction is formed at the left and right side edges on the lower surface of the lower wall forming portion (21) of the lower component member (13).
The height of both rising walls (16) of the lower component (13) is equal to the height of the reinforcing wall forming portion (18). The lower component (13)
It is made of an aluminum brazing sheet having a brazing material layer (not shown) on one side, that is, on the lower surface of the lower wall forming portion (21) and the outer surface of the both rising walls (16).

The upper component (14) comprises a flat upper wall forming part (22).
And a hanging wall integrally formed on both side edges of the upper wall forming portion (22)
(15). The width of the upper wall forming portion (22) of the upper component (14) is slightly larger than the width of the lower component (13), and the lower component (13)
Is to be covered. The hanging length of both hanging walls (15) of the upper component (14) is
6) It is slightly larger than the height. Upper component (14)
Consists of an aluminum brazing sheet having a brazing material layer (not shown) on both surfaces, that is, on both upper and lower surfaces of the upper wall forming portion (22), and on both inner and outer surfaces of both hanging walls (15).

In brazing the upper and lower structural members (14) and (13), after these are subjected to a degreasing treatment, a brazing flux is applied by the apparatus of the present invention. That is, in order to apply the lower component member (13) to a flat plate, the application roll (101) and the backup roll (102) have a cylindrical surface as a whole in order to apply the lower component (13) to a flat plate. A flux is applied between the application roll (101) of (100) and the backup roll (102), and a flux is applied to the upper end surfaces of the rising wall (16) and the reinforcing wall forming portion (18). Further, the upper component member (14) is formed by the application roll (112) of the device (111) having the configuration shown in FIG. 3 and having the application roll (112) and the backup roll (113) as shown in FIG. The flux is applied to the lower surface of the upper wall forming portion (22) by passing the flux between the upper roll forming portion (22) and the backup roll (113).

Next, the upper component (14) is replaced with the lower component (13).
After the lower component (13), the portion of the both hanging walls (15) of the upper component (14) protruding downward from the upstanding walls (16) of the lower component (13) is bent inward to be bent downward. 13) slope (1
7), and both components (14) and (13) are temporarily fixed while applying force from above and below. After that, the two members (14) and (13) temporarily fixed are heated to a brazing temperature, so that the upper ends of the both rising walls (16) of the lower member (13) are upper walls of the upper member (14). Forming part (22) is brazed to the left and right ends of the lower surface and the upper end of the reinforcing wall forming part (18) is the upper wall forming part (2).
2) Brazing to the lower surface, and the hanging wall (15) of the upper component (14)
And the upstanding wall (16) of the lower component (13) and the hanging portion (15) of the lower wall (15) of the upper component (14). And braze it with a lap joint.

FIG. 8 shows a first modified example of a flat tube which is composed of two aluminum component members to which a flux is applied and brazed after being applied by the apparatus of the present invention, and which constitutes a refrigerant flow tube. The upper and lower components constituting this flat tube are shown.

In FIG. 8, an aluminum flat tube (T2)
In the upper wall (7), a plurality of ridges (30) extending in the longitudinal direction are formed integrally with the inner surface of the upper wall (7) in a downwardly protruding shape to increase the heat transfer area, and the inner wall of the lower wall (8) is adjacent to the inner wall. A plurality of projections (31) are integrally formed in a protruding shape at intervals in the length direction in a portion between the reinforcing walls (11) in order to increase a heat transfer area. Other configurations are the same as those shown in FIG.

The flat tube (T2) is formed by fitting a plate-like aluminum lower component (13) as shown in FIG. 9 and a plate-like aluminum upper component (14) and brazing the same. It is manufactured by

The lower component (13) is formed by integrally forming a projection (31) on the upper surface of the lower wall forming portion (21).
On the lower surface of the upper wall forming portion (22), a plurality of ridges (30) extending in the length direction are spaced apart in the left-right direction and are integrally formed in a downward protruding shape over the entire width except for a predetermined width portion at both left and right ends. It is formed in. Therefore, on the lower surface of the upper wall forming portion (22), at least one ridge (30) exists at a portion corresponding to each reinforcing wall forming portion (18) of the lower component (13).
Since the ridges (30) are formed simultaneously with the rolling of the upper component (14), the thickness of the brazing material layer at the ridges (30) is greater than at the other portions. Other configurations of the upper and lower constituent members (14) and (13) are the same as those shown in FIG.

In brazing the upper and lower structural members (14) and (13), after degreasing them, a brazing flux is applied by the apparatus of the present invention. That is, in order to apply the lower component member (13) to a flat plate, the application roll (101) and the backup roll (102) have a cylindrical surface as a whole in order to apply the lower component (13) to a flat plate. A flux is applied between the application roll (101) of (100) and the backup roll (102), and a flux is applied to the upper end surfaces of the rising wall (16) and the reinforcing wall forming portion (18). Further, the upper component member (14) is formed by the application roll (112) of the device (111) having the configuration shown in FIG. 3 and having the application roll (112) and the backup roll (113) as shown in FIG. The flux is applied to the lower surface of the upper wall forming portion (22) and the tip end surface of the ridge (30) by passing through the space between the backup roll (113). And the flat tube (T1) shown in FIG.
The upper and lower structural members (14) and (13) are brazed in the same manner as in the above case.

However, after the upper component member (14) is fitted over the lower component member (13), the both rising walls (16) of the lower component member (13) on the both hanging walls (15) of the upper component member (14). ) Is bent inward to project the portion below, and the inclined surface (17) of the lower component (13).
When the two members (14) and (13) are temporarily fixed with a force applied from above and below, the portion (32) between the adjacent notches (20) in the reinforcing wall forming portion (18) is Upper wall forming part (22) of upper component (14) due to different height positions of the upper edge
Each part (32) even if there is a gap between
The upper edge closely contacts the ridges (30) on the lower surface of the upper wall forming portion (22). If the size of the gap is smaller than the protruding height of the ridge (30), the ridge (30) is deformed. In addition, both components
(14) When the temporarily fixed (13) is heated to the brazing temperature, the reinforcing wall forming portion (18) of the lower component (13) has a raised ridge (30).
Brazed to The thickness of the brazing material layer at the ridge (30) is
Because it is thicker than the other parts, the molten brazing material is easily drawn to this part during brazing, and the gap between the upper surface of the reinforcing wall forming part (18) and the two ridges (30) Is also blocked.

FIG. 10 shows a second modified example of a flat tube which is composed of two aluminum component members to which a flux is applied and brazed after being applied by the apparatus of the present invention, and which constitutes a refrigerant flow tube. The upper and lower components constituting this flat tube are shown, and FIG. 12 shows a method of applying flux to the lower components.

In FIG. 10, an aluminum flat tube (T
3) Lower wall (8), left and right side walls (35) (36) and reinforced wall (11)
Aluminum plate-shaped lower component (37) and upper wall
And (7) an upper component (38) made of a flat aluminum plate.

The left and right side walls (35) and (36) are formed by joining a rising wall (39) integrally formed with the lower wall (8) to a flat upper wall (7).

Communication holes (19) formed in a plurality of reinforcing walls (11)
The rectangular notches (40) provided at predetermined intervals on the upper edge of the reinforcing wall forming portion (18) are formed by closing the open portions with the upper wall (7). .

The flat tube (T3) is manufactured by brazing a plate-shaped aluminum lower component (37) as shown in FIG. 11 and a plate-shaped aluminum upper component (38). You.

The lower component member (37) includes a lower wall forming portion (41) and a rising wall (3) integrally formed on both side edges of the lower wall forming portion (41).
9) and a plurality of reinforcing wall forming portions (18) extending in the length direction integrally formed at a predetermined interval from each other and rising walls (39) of the lower wall forming portion (41). In the upper edge of the reinforcing wall forming portion (18), rectangular notches (40) are formed at predetermined intervals in the length direction thereof so as to be staggered when viewed from a plane. Both rising walls (39) of the lower component (37)
A thin portion (39b) is provided on the upper portion of the upper portion via a step (39a). The lower surface of the lower wall forming portion (41) of the lower component member (37) and the outer surface of the rising wall (39) are covered with a brazing material layer (not shown), and one surface is covered with the brazing material layer. It consists of an aluminum brazing sheet.

The upper component member (38) has a flat plate shape as a whole, and has inclined surfaces (38a) which are inclined outward and downward at both side edges of the upper surface. The upper constituent member (38) is made of an aluminum brazing sheet whose both surfaces are covered with a brazing material layer (not shown) and whose both surfaces are covered with a brazing material layer.

In brazing the upper and lower structural members (38) and (37), after these are subjected to a degreasing treatment, a flux for brazing is applied by the apparatus of the present invention. That is, an apparatus in which the peripheral surfaces of an application roll (101) and a backup roll (102) are entirely cylindrical in order to apply the lower component (37) to the flat plate as shown in FIG. Pass between the application role (101) of (100) and the backup role (102). However, as shown in FIG. 12, the length of the application roll (101) is set to be equal to the distance between the thin portions (39b) of the rising wall (39), and both ends of the application roll (101) are stepped. Part (39a) Then, the application role
By (101), the flux is applied to the step portion (39a) of the upstanding wall (39) and the upper end surface of the reinforcing wall forming portion (18). Further, the peripheral surfaces of the application roll (112) and the backup roll (113) are entirely cylindrical in order to apply the upper component (38) to the flat plate as shown in FIG. The flux is applied between the application roll (112) and the backup roll (113) of the device (111), and the lower surface thereof is coated with flux. Then, both side edges of the upper component member (38) are placed on the step (39a) of the rising wall (39) of the lower component member (37), and the thin portion (39b) is bent to form the upper component member (38). After being brought into close contact with the inclined surface (38a), the rising wall (39) of the lower component (37) and the tip of the reinforcing wall forming portion (18) and the upper component (38)
And brazing.

FIG. 13 shows a third modification of the flat tube which is made of an aluminum component member to which a flux is applied and brazed after being applied by the apparatus of the present invention, and which constitutes a refrigerant flow tube. FIG. 14 shows this flat tube. Fig. 2 shows components constituting a tube.

In FIG. 13, an aluminum flat tube (T
The left side wall (45) of (4) is formed integrally with the left side wall (45a) of the upper wall (7), which is downwardly formed integrally with the left side edge of the upper wall (7). Left upward wall forming part (4
5b) is formed by brazing the end portions of each other with an abutting shape, and the outer surface thereof has an arc-shaped cross section. The butted portion of the left side wall forming portions (45a) (45b) is oblique in cross section to increase the brazing area. The right side wall (46) is formed integrally with the upper wall (7) and the lower wall (8), and has a circular arc shape projecting outward in the cross section as a whole. The reinforcing wall (47) has a downward reinforcing wall forming portion (47a) integrally formed in a hanging manner with the upper wall (7), and an upward reinforcing wall forming portion (47b) integrally formed in a rising shape on the lower wall (8). ) Are formed by brazing the end portions with each other. The communication hole (48) is the upper wall (7)
A pair of notches (a pair of notches (4) provided at the lower edge of the downward reinforcing wall forming portion (47a) and the upper edge of the upward reinforcing wall forming portion (47b) of the lower wall (8) are provided at intervals in the longitudinal direction. It is formed by combining 48a) and (48b). Also in this case, the communication holes (48) formed in the plurality of reinforcing walls (47) are in a staggered arrangement when viewed from a plane.

The flat tube (T4) is formed by bending a single plate-shaped member made of an aluminum brazing sheet having a brazing material layer on both sides as shown in FIG. It is manufactured by brazing the forming portions 45a and 45b and the reinforcing wall forming portions 47a and 47b in abutting condition.

The constituent member (52) includes an upper wall forming portion (49), a lower wall forming portion (51) connected to the upper wall forming portion (49) via a flat connecting portion (50), and both side edges. Left wall forming parts (45a) (45b) integrally formed in an upwardly protruding shape, and upper and lower wall forming parts (49) (51)
A plurality of reinforcing wall forming portions (47a) (47b) integrally formed in an upwardly protruding shape so as to be symmetrical about the connecting portion (50) and having notches (48a) (48b). .

Both left side wall forming portions (45a) and (45b) of the component (52)
When brazing the parts and the reinforcing wall forming parts (47a) and (47b) in abutting state, the component (52) is subjected to a degreasing treatment, and then a brazing flux is applied by the apparatus of the present invention. That is, in order to apply the constituent member (52) to the flat plate as shown in FIG. 1, the peripheral surfaces of the application roll (101) and the backup roll (102) are entirely cylindrical. 100) between the application roll (101) and the backup roll (102), flux is applied to the upper end surfaces of both left wall forming portions (45a) (45b) and reinforcing wall forming portions (47a) (47b). Apply.
Thereafter, the constituent member (52) is bent into a hairpin shape at the connecting portion (50), and the left side wall forming portions (45a) (45b) and the reinforcing wall forming portions (47a) (47b) are joined together and brazed. .

As described above, the flat tubes (T1) (T2) (T3) (T4)
When the apparatus of the present invention is used for applying a flux when manufacturing the flux, it is possible to apply the thinner uniformly and to the minimum necessary amount, so that the obtained flat tube (T1) (T2) (T3) ( T4)
The flux residue in the inside can be minimized.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a flux coating device according to the present invention.

FIG. 2 shows an application of the apparatus of the first embodiment for applying flux to a plate-shaped aluminum material, which is a profiled product having a flat plate-like portion and rising walls integrally formed on both side edges thereof. FIG. 4 is a vertical vertical sectional view showing a configuration of a roll and a backup roll.

FIG. 3 is a schematic configuration diagram showing a second embodiment of the flux coating device according to the present invention.

FIG. 4 shows an application for applying a flux to a plate-shaped aluminum material, which is a device of the second embodiment, which is a modified cross-sectional product having a flat plate-shaped portion and a hanging wall integrally formed on both side edges thereof. FIG. 4 is a vertical vertical sectional view showing a configuration of a roll and a backup roll.

FIG. 5 is a front view showing a condenser including, as a refrigerant flow tube, a flat aluminum tube made of two aluminum components that are coated with a flux and brazed after being applied by the apparatus of the present invention.

FIG. 6 is a cross-sectional view showing a flat tube constituting a refrigerant flow tube.

FIG. 7 is a partial perspective view showing upper and lower components constituting the flat tube of FIG. 6;

FIG. 8 is a cross-sectional view showing a first modification of the flat tube constituting the refrigerant flow tube.

FIG. 9 is a partial perspective view showing upper and lower components constituting the flat tube of FIG. 8;

FIG. 10 is a cross-sectional view showing a second modified example of the flat tube constituting the refrigerant flow tube.

11 is a partial perspective view showing upper and lower components constituting the flat tube of FIG. 10;

12 is a cross-sectional view of the lower component showing a method of applying a flux to the lower component of FIG. 11 using the apparatus of the present invention.

FIG. 13 is a cross-sectional view showing a third modified example of the flat tube constituting the refrigerant flow tube.

FIG. 14 is a partial perspective view of components used to manufacture the flat tube of FIG.

[Explanation of symbols]

 (100) (111): Flux coating device (101) (112): Application roll (102) (113): Backup roll (103): Tank (104): Flux suspension (105) (114): Pickup roll (A): Sheet aluminum material (sheet metal material)

Claims (4)

[Claims] 1. An apparatus for continuously applying a flux to a plate-shaped metal material, wherein an application roll and a backup roll arranged so as to sandwich the plate-shaped metal material from both sides, and a flux suspension are stored therein. A tank and a pickup roll that is partially immersed in the flux suspension in the tank and supplies the flux suspension to the application roll, so that the application roll rotates in an arbitrary direction. Flux coating device. 2. The flux according to claim 1, wherein the pick-up roll and the application roll are in direct contact with each other, and the two rolls rotate in any directions irrespective of the rotation directions of the other rolls. Coating device. 3. At least one or more transfer rolls are interposed between the pickup roll and the application roll, and the pickup roll, the application roll, and the transfer roll can each have an arbitrary shape regardless of the rotation direction of the other rolls. The flux coating device according to claim 1, wherein the flux coating device rotates in the direction. 4. The flux coating device according to claim 2, wherein one of the two rolls in contact with each other is made of metal and the other is made of rubber.