JP3769984B2 - Flux recovery device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is provided integrally with a dry flux coating apparatus that applies a dry powder flux to an object to be coated, for collecting and reusing the powdered flux that has fallen without adhering to the object to be coated. The present invention relates to a flux recovery apparatus.
[0002]
[Prior art]
Conventionally, for example, when brazing an aluminum heat exchanger, the surface of the filler metal (brazing material) and the base metal is prevented from being oxidized, and the metal oxide generated during heating is dissolved and liquefied. In order to infiltrate the material into the narrow gap, flux (solvent) is applied to the heat exchanger before brazing the heat exchanger. As a flux coating method, generally used is a wet flux coating method in which a powdered flux is mixed in water and a heat exchanger is immersed in the powder to apply the powdered flux to the heat exchanger. Has been.
[0003]
However, in the conventional wet flux application method, before the powdered flux is applied, a cleaning process for removing oil adhering to the surface of the heat exchanger and moisture on the surface of the heat exchanger after application are removed. Therefore, there is a problem that a lot of energy is required.
[0004]
On the other hand, as shown in FIG. 4, the dry-type powder flux is applied to the coated body 101 such as an aluminum heat exchanger, and dropped without adhering to the coated body 101. A system including a flux recovery apparatus 200 for recovering and reusing powdery flux is also generally employed.
[0005]
The dry flux coating apparatus 100 includes a spray nozzle 103 disposed in a coating booth 102, a supply tank 104 that stores dry powder flux, and a powder flux in the supply tank 104 to the spray nozzle 103. An electromagnetic valve 105 and a pump 106 for supplying using negative pressure are provided, and an electromagnetic valve 107 for supplying air (air) in order to fly the powdery flux far away.
[0006]
Further, the flux recovery apparatus 200 is provided integrally below the coating booth 102, and a hopper 202 in which a flux pool 201 is formed, and a powder flux for reusing the powder flux in the flux pool 201. Is provided with a recovery pump 203 and a solenoid valve 204 for transporting the fuel to the supply tank 104 using negative pressure.
[0007]
[Problems to be solved by the invention]
However, when the dry powder flux is applied to the substrate 101 as in the conventional dry flux coating apparatus 100, the powder flux that is sprayed from the spray nozzle 103 onto the substrate 101. Among these, the powdery flux that has not adhered to the substrate 101 is accumulated in the flux pool 201 below the substrate 101.
[0008]
The powdered flux accumulated in the flux pool 201 is cured when time elapses (for example, left for about one month), which causes a problem that it cannot be collected. Moreover, when the movable part which performs some operation | movement is provided in the flux collection | recovery apparatus 200, a powdery flux will harden | cure if a powdery flux adheres to the movable part and time passes. For this reason, the problem that the movable part of the flux collection | recovery apparatus 200 cannot move will arise.
[0009]
OBJECT OF THE INVENTION
An object of the present invention is to provide a flux recovery apparatus that can quickly recover a powdery flux that has fallen without adhering to an object to be coated before the powdery flux is cured .
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, a cleaning process for removing oil adhering to the coated body before the application of the powdery flux, and for removing moisture from the coated body after coating. Since there is no drying process and a dry powder flux can be applied to an object without using water, a large amount of energy is not required.
[0011]
Further, a scraping means (first sprocket disposed at one end of the main body base, the main base of the main body base disposed so as to be movable from one end to the other end of the main body base disposed below the substrate . A second sprocket disposed at the other end, a connecting body coupled to the first and second sprockets, a spatula that moves in conjunction with the connecting body, etc.) The powdery flux that has dropped onto the bottom can be collected by scraping from one end of the main body base to the other end.
In addition, by connecting member hangs down by the weight of the spatula, the body-based by contacting the tip of the spatula in the bottom, spatula powdered flux that has fallen in the body the bottom of the base on without adhering to the medium to be coated is the body When moving from one end of the base to the other end, it can be reliably scraped. Thereby, the powdery flux dropped on the bottom of the main body base can be recovered by scraping with a spatula without stagnation of the powdery flux dropped and adhered on the bottom of the main body base.
Furthermore, since the flux storage means is disposed below the other end of the main body base, the powdery flux collected by the scraping means can be moved to the flux storage means. Also, by lifting the weight that is rotatably supported by the main body base in front of the moving direction of the spatula that moves in conjunction with the coupling body, and causing the weight to collide with the spatula, the powdery flux adhering around the spatula is removed. Can be dismissed.
Therefore, the powdery flux that has fallen on the bottom of the main body base without adhering to the coated body can be easily and quickly collected before the powdery flux is cured, so that the movable part of the flux collecting device moves. It can be prevented from disappearing.
[0012]
According to the invention described in claim 2, flux powder flux which is scraped by the raked means pooled float in the air by the flux accumulating mechanism, in order to reuse the powder form flux stored in the flux reservoir mechanism By conveying by the conveying means, the powdery flux can be collected quickly and reusably.
[0013]
According to the invention described in claim 3, by blowing gas toward the upper part of the perforated plate from below the perforated plate disposed in the hopper storing the powdered flux collected by the scraping means , Since the powdery flux can be floated and stored in the air rather than the perforated plate, the powdery flux can be prevented from solidifying in the hopper. Therefore, it becomes easy to convey the powdery flux by the flux conveying means.
[0014]
According to invention of Claim 4 and Claim 5, a flux collection | recovery apparatus is provided under the dry-type flux application | coating apparatus, and the powdery flux which fell on the bottom part of the main body base, without adhering to a to-be-coated body, A rubber spatula that moves on the bottom of the main body base from one end to the other end of the main body is scraped to the other end of the main body base. Specifically, the endless coupling body hangs down due to the weight of the frame and the rubber spatula, so that the tip of the rubber spatula is reliably brought into contact with the bottom of the main body base, and the tip of the rubber spatula is brought into close contact with every corner of the bottom of the main body base. It is configured to scrape off the flux. As a result, it is possible to scrape with a rubber spatula immediately after falling on the bottom of the main body without stagnating the powdery flux that has fallen onto and adhered to the bottom of the main body base, so that it fell on the bottom of the main body base. All the powdery flux can be recovered.
Further, the powdery flux adhering to the endless connector, the frame and the rubber spatula is peeled off from the endless connector, the frame and the rubber spatula by the impact of the weight colliding with the endless connector or the rubber spatula. Thereby, the powdery flux adhering to the endless connector, the frame, and the rubber spatula can be collected before the powdery flux is cured.
Therefore, since the powdery flux that has fallen without adhering to the coated body can be easily and quickly collected before the powdery flux is cured, it is possible to prevent the movable part of the flux collecting device from moving. it can.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
[Configuration of Example]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. Here, FIG. 1 is a diagram illustrating a dry flux coating apparatus and a flux recovery apparatus.
[0016]
The flux collecting apparatus 1 of the present embodiment is integrally provided at the lower part of the dry flux coating apparatus 2, and a main body base 4 disposed below the body 3 to be coated and a drop on the main body base 4. A scraping mechanism 5 for scraping the powdered flux, a flux storing mechanism 6 for floating and storing the powdered flux in the air, and a powder in the dry flux coating device 2 to reuse the powdered flux of the flux storing mechanism 6 And a flux transport mechanism 7 for transporting the flux.
[0017]
First, the dry-type flux coating apparatus 2 includes a coating booth 10 that can hold the body 3 to be coated therein, a supply tank 11 for coating a dry powder flux on the body 3 to be coated, and this supply tank. 11 is provided with a flux supply mechanism 12 for guiding the powdery flux from 11 to the spray nozzle 9 and an air supply mechanism 13 for guiding air (air) to the spray nozzle 9.
[0018]
The flux supply mechanism 12 includes a flux introduction path 14 for conveying a dry powder flux from the supply tank 11 to the spray nozzle 9, and a spray nozzle for spraying the dry powder flux from the supply tank 11 using negative pressure. 9 is composed of an ejector type air pump 15 for feeding to the air 9 and an electromagnetic valve 16 for supplying or stopping air to the atmosphere.
[0019]
The air supply mechanism 13 includes an air introduction path 17 for guiding air (air) to the spray nozzle 9 and an electromagnetic valve 18 for supplying or stopping the air to the spray nozzle 9. By guiding the nozzle 9 and mixing air into the powdery flux, the powdery flux blown out from the spraying nozzle 9 functions to quickly fly far.
[0020]
Here, the coated body 3 may be an aluminum heat exchanger or the like joined by brazing, for example, and a brazing sheet may be used as a base material. Specifically, it is an in-vehicle heat exchanger such as a radiator of an engine cooling device, a heater core of a hot water heating device, a condenser or a super cooler of an refrigeration cycle, or an oil cooler.
[0021]
The main body base 4 is integrally assembled to the lower part of the coating booth 10 of the dry flux coating apparatus 2. The main body base 4 has a depth from the one end to the other end and has a flat bottom. Note that one end of the main body base 4 is positioned below the substrate 3 to be coated.
[0022]
Next, the scraping mechanism 5 of the present embodiment will be described with reference to FIGS. Here, FIG. 2 and FIGS. 3A and 3B are views showing the main structure of the scraping mechanism 5. FIG.
[0023]
The scraping mechanism 5 corresponds to the scraping means of the present invention, and is two driven sprockets (corresponding to the first sprocket of the present invention) rotatably supported by the main body base 4 near the bottom of one end of the main body base 4. ) 21, two drive sprockets (corresponding to the second sprocket of the present invention) 22 rotatably supported by the main body base 4 near the bottom of the other end of the main body base 4, and two driven sprockets 21 and 2 Two sets of endless coupling bodies 23 respectively coupled to the two drive sprockets 22, a plurality of frames 24 spanned so as to couple these endless coupling bodies 23, and a plurality of integrally assembled to these frames 24 Rubber spatula 25.
[0024]
The two driven sprockets 21 are connected to a main body base 4 by a shaft (not shown) that is rotatably supported. The two drive sprockets 22 are connected by a shaft 27 that is rotatably supported by the main body base 4. The two drive sprockets 22 have two pulleys 29 so as to be belt-driven by a motor 28 placed on the upper end surface of the outer wall portion of the main body base 4.
[0025]
The two sets of endless connecting bodies 23 move a plurality of rubber spats 25 from one end of the main body base 4 to the other end as the two drive sprockets 22 rotate. For example, a chain or a belt is used. . The plurality of frames 24 are made of, for example, stainless steel, and are assembled to two sets of endless connectors 23 via attachments 30. Each frame 24 is assembled to two sets of endless coupling bodies 23 at intervals of 90 °, for example. The plurality of rubber spats 25 are elastic bodies having a width that extends over the entire bottom of the main body base 4.
[0026]
A weight-up portion 32 is assembled to the two sets of endless connecting bodies 23 via attachments 31 at a predetermined distance (for example, about 45 °) in front of each rubber spatula 25. The other end of the main body base 4 has a weight 33 disposed so as to come into contact with a plurality of rubber spats 25 that move in conjunction with the two sets of endless connectors 23, and a plate 34 on which the weight 33 is placed. And have.
[0027]
The weight-up portion 32 constitutes lifting means for lifting the weight 33 in front of the moving direction of each rubber spatula 25. A weight 33 is placed on one end of the plate 34, and the other end of the plate 34 is rotatably supported by the frame 35 of the main body base 4. The frame 35 is provided with a stopper 36 for determining the lowest rotation position of the weight 33 to a predetermined position.
[0028]
The flux storage mechanism 6 corresponds to the flux storage means of the present invention, and an air chamber that floats and stores the powdered flux scraped to the other end of the main body base 4 by the plurality of rubber spats 25 of the scraping mechanism 5. 37, a perforated plate 39 disposed in the hopper 38, an air introduction path 40 for guiding gas (air) to the perforated plate 39, and a perforated plate from below the perforated plate 39. And an air pump 41 (which corresponds to the gas blowing means of the present invention) 41 for blowing gas (air) toward the upper side of 39.
[0029]
The flux conveyance mechanism 7 corresponds to the flux conveyance means of the present invention, and uses a negative pressure from the flux introduction path 42 for conveying the powdery flux from the air chamber 37 to the supply tank 11 and from the inside of the hopper 38. An ejector-type recovery pump 43 for pumping the powdery flux to the supply tank 11, the recovery pump 43 and an electromagnetic valve 44 for supplying or stopping air to the atmosphere are configured.
[0030]
(Effects of Example)
Next, the operation of the flux recovery apparatus 1 of this embodiment will be briefly described with reference to FIGS.
[0031]
For example, the object 3 is placed in the application booth 10 and held at a predetermined position for the purpose of applying powdered flux to the object 3 before brazing the object 3 such as an aluminum heat exchanger. To do. Then, a dry powder flux is applied to the substrate 3. Here, of the dry powdery flux blown from the spray nozzle 9, the powdery flux that did not adhere to the coated body 3 falls on the bottom of one end of the main body base 4 in the depth direction.
[0032]
Then, the endless connector 23 hangs down due to the weight of the rubber spatula 25, and the rubber spatula 25 reliably contacts the bottom of the main body base 4. As a result, the rubber spatula 25 that reliably contacts the bottom of the main body base 4 is moved from one end in the depth direction of the main body base 4 toward the other end on the bottom of the main body base 4 by the operation of the endless connector 23. Then, the powdery flux is immediately scraped by the rubber spatula 25 in the air chamber 37 in the hopper 38 provided below the other end of the main body base 4 in the depth direction.
[0033]
Further, when the endless connector 23 moves, when the weight-up portion 32 disposed at a predetermined distance (for example, 45 °) in front of each rubber spatula 25 (moving direction) reaches the drive sprocket 22, FIG. As shown by a solid line and a two-dot chain line in (a), the weight-up unit 32 lifts the plate 34 on which the weight 33 is placed to a predetermined position. When the weight-up portion 32 further moves, as shown by a two-dot chain line in FIG. 3 (b), the weight-up portion 32 drops after being separated from the weight 33, and the weight 33 is moved to the endless connector 23 or the rubber spatula. Collide with 25.
[0034]
And the powdery flux adhering to the endless connection body 23, the frame 24, and the rubber spatula 25 by the impact that the weight 33 collides with the endless connection body 23 or the rubber spatula 25 is peeled off from the endless connection body 23, the frame 24, and the rubber spatula 25 ( And is collected in the air chamber 37 in the hopper 38.
[0035]
On the other hand, since air is blown from the lower side of the porous plate 39 disposed in the hopper 38 toward the upper side of the porous plate 39, the powdery flux is stored in a state of floating in the air. As a result, it is possible to prevent the powdery flux from solidifying in the air chamber 37, so that the powdery flux can be easily conveyed to the supply tank 11 by the flux conveying mechanism 7.
[0036]
[Effects of Examples]
Conventionally, a problem in recovering powdery flux is that powdery flux that has not adhered to the object to be coated cannot be recovered by being deposited and cured at the bottom of the flux coating device. That is, the magnetic flux adheres and cures on the movable part, and the movable part does not move.
[0037]
Therefore, in the present embodiment, the flux collecting device 1 is provided below the dry flux coating device 2, and the powdery flux that has fallen on the bottom of the main body base 4 without adhering to the coated body 3 is removed in the depth direction of the main body base 4 . The rubber spatula 25 that moves on the bottom of the main body base 4 from one end to the other end of the main body 4 is scraped into an air chamber 37 in a hopper 38 provided below the other end of the main body base 4 in the depth direction. is doing.
[0038]
Specifically, the endless connector 23 hangs down due to the weight of the stainless steel frame 24 and the rubber spatula 25, so that the tip of the rubber spatula 25 is reliably brought into contact with the bottom of the main body base 4, and the tip of the rubber spatula 25 is brought into contact with the main body base 4. The powdery flux is scraped off in close contact with every corner of the bottom. Thus, without stagnant powdered flux adhering to fall on the bottom of the body base 4 (cured deposited at the bottom of the dry flux coating apparatus 2), Gomuhera immediately after falling onto the bottom of the body base 4 as it can be scraped off in 25, it can be recovered all powdered flux that has fallen on the bottom of the body base 4.
[0039]
Further, the powdery flux adhering to the endless connector 23, the frame 24 and the rubber spatula 25 is peeled off from the endless connector 23, the frame 24 and the rubber spatula 25 by the impact of the weight 33 colliding with the endless connector 23 or the rubber spatula 25. ) As a result, the powdered flux can be dropped and collected in the air chamber 37 in the hopper 38 before being adhered to the endless connector 23, the frame 24, and the rubber spatula 25 and being hardened.
[0040]
Therefore, since the powdery flux that has fallen without adhering to the coated body 3 can be easily and quickly collected before it is cured, it is possible to prevent the movable part of the flux collecting apparatus 1 from becoming stuck, and In order to reuse the powdery flux, it becomes easy to transport to the supply tank 11.
[0041]
Here, the powdery flux on the rotating members such as the driven sprocket 21, its shaft, the driving sprocket 22, and its shaft 27 is easily dropped onto the bottom of the main body base 4 because these rotating members are rotating. However, the powdery flux does not adhere to the driven sprocket 21, its shaft, the drive sprocket 22, and its shaft 27.
[0042]
Furthermore, since the endless connecting body 23 is only moved and regulated by the driven sprocket 21 and the drive sprocket 22, the force with which the rubber spatula 25 pushes the bottom of the main body base 4 can be controlled by the weight of the rubber spatula 25, and excessive force Can be added to prevent the rubber spatula 25 and the bottom of the main body base 4 from being abnormally worn.
[0043]
And the dry-type flux application | coating apparatus 2 of a present Example removes the water | moisture content of the to-be-coated body 3 after a washing | cleaning process for removing the oil adhering to the to-be-coated body 3 before application | coating of a powdery flux. Therefore, a dry powder flux can be applied to the coated body 3 without using water, so that much energy is not required.
[0044]
[Modification]
In addition, when a chain is used as the endless connecting body 23, there is a possibility that powdery flux enters the chain link. Even if a flux enters, it can be dropped.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a dry flux coating apparatus and a flux recovery apparatus (Example).
FIG. 2 is a sectional view showing the main structure of a scraping mechanism (Example).
FIGS. 3A and 3B are explanatory views showing the operation of a scraping mechanism (Example). FIGS.
FIG. 4 is a schematic view showing a dry-type flux application device and a flux recovery device (prior art).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flux collection | recovery apparatus 2 Dry-type flux application | coating apparatus 3 To-be-coated body 4 Main body base 5 Scrap collection mechanism (scrap collection means)
6 Flux storage mechanism (flux storage means)
7 Flux transport mechanism (flux transport means)
9 Spray nozzle 22 Drive sprocket (second sprocket)
23 Endless connector 24 Frame 25 Rubber spatula 32 Weight-up part (lifting means)
33 Weight 36 Stopper 37 Air chamber 38 Hopper 39 Perforated plate 41 Air pump (gas blowing means)

Claims (5)

In a flux recovery device provided integrally with a dry-type flux application device for applying a dry-type powdery flux to an object to be coated,
(A) a main body base disposed below the coated body and receiving a powdered flux that has fallen without adhering to the coated body;
(B) a scraping means disposed so as to be movable from one end portion of the main body base to the other end portion, and scraping the powdery flux dropped on the bottom portion of the main body base to the other end portion of the main body base;
(C) a flux storage means disposed below the other end of the main body base and storing the powdered flux scraped by the scraping means;
The scraping means is disposed at one end of the main body base, and a first sprocket rotatably supported on the main body base;
A second sprocket disposed at the other end of the main body base and rotatably supported on the main body base;
A coupling body coupled to the first and second sprockets and moving as the first and second sprockets rotate;
A spatula that moves in conjunction with this connected body and scrapes the powdered flux that has fallen on the bottom of the main body base to the other end of the main body base,
A weight disposed so as to be able to contact the spatula moving in conjunction with the coupling body, and rotatably supported by the main body base;
Lifting means for lifting the weight in front of the moving direction of the spatula;
Have
The said spatula is comprised so that the front-end | tip of the said spatula may contact the bottom part of the said main body base, when moving to the other end part from the one end part of the said main body base, The flux collection apparatus characterized by the above-mentioned . In the flux collection device according to claim 1,
The flux storing means is a flux storing mechanism that floats and stores the powdered flux scraped by the scraping means in the air ,
Flux collecting apparatus characterized by comprising a flux conveying means to convey to reuse the powdered flux stored in the flux storage means. In the flux collection device according to claim 2,
The flux storage means is a hopper that floats and stores the powdered flux scraped by the scraping means in the air ;
A perforated plate disposed in the hopper;
A flux recovery apparatus comprising gas blowing means for blowing gas from the lower side of the porous plate toward the upper side of the porous plate. In the flux collection | recovery apparatus in any one of Claims 1 thru | or 3,
The first sprocket is two drive sprockets,
The second sprocket is two driven sprockets,
The coupling body is two sets of endless coupling bodies respectively coupled to the two driving sprockets and the two driven sprockets,
The scraping means has a plurality of frames spanned to connect the two sets of endless connectors.
The spatula is a plurality of rubber spats integrally assembled with the plurality of frames . In the flux collection device according to claim 4,
The plurality of rubber spats are elastic bodies having a width extending over the entire bottom of the main body base .

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