WO2012035943A1 - Soldering device - Google Patents

Abstract

A soldering device that solders electronic components onto substrates. As shown in figure 1, said soldering device is provided with: a blower mechanism (99) that is provided at a prescribed location along a conveyance path, which conveys substrates, and blows a gas over the conveyance path to form an air-curtain area (927) in which the surrounding atmosphere is kept away; and a control unit (65) that controls the blower mechanism (99) so as to start or stop the flow of air in accordance with the timing at which substrates pass said mechanism. The blower mechanism can be controlled such that blowing stops immediately before a substrate passes the air-curtain area (927), remains stopped while the substrate is passing by, and restarts immediately after the substrate passes the air-curtain area (927). This makes it possible to prevent turbulence, with higher priority than the ability of the blower mechanism to keep the surrounding atmosphere away from the conveyance path, and allow substrates to pass the air-curtain area without accompanying turbulence.

Description

Soldering equipment

The present invention relates to a soldering apparatus having an air curtain area at a predetermined position and applicable to a jet soldering apparatus, a reflow apparatus or the like. The jet soldering apparatus ejects molten solder to a component mounting portion of a printed circuit board, and solders the printed circuit board and the electronic component. The reflow apparatus performs a soldering process on the electronic component and the printed board by performing a reflow process on the printed board on which the electronic component is placed by cream solder.

Conventionally, when an electronic component is soldered to a predetermined surface of a printed circuit board, a jet soldering device, a reflow device, or the like is used. According to the jet soldering apparatus, a fluxer, a pre-heater, a jet soldering processing unit, a cooler, and the like are arranged at predetermined positions. In this jet soldering apparatus, when an electronic component is soldered to a printed board, first, flux is applied to one surface of the printed board with a fluxer. Next, the printed circuit board is preheated with a preheater, the printed circuit board and the electronic component are soldered with a jet soldering tank, and the printed circuit board is cooled with a cooler. By these processes, the soldering is completed (see Patent Document 1).

Also, with respect to the reflow apparatus, Patent Document 2 discloses a soldering reflow furnace. The soldering reflow furnace includes a cylindrical muffle, a heat insulating wall, a preheating heater, a reflow heater, a cooling device, and an air curtain.

In the outer periphery of the muffle, a preheating heater, a reflow heater and a cooling device are arranged from the inlet side to the outlet side through a heat insulating wall. Air curtains are provided on the inlet side and outlet side of the muffle, and nitrogen gas is introduced into the air curtain. The air curtain functions to prevent outside air from flowing in from the entrance / exit of the muffle, prevent inflow of dust and the like into the interior, and prevent outflow of nitrogen gas from the inside of the muffle to the outside.

The inside of the muffle is sealed except for the carry-in part for carrying the printed circuit board and the carry-out part for carrying it out, and a nitrogen atmosphere is created by nitrogen gas blown from the air curtain. A mesh belt is provided inside the muffle, and the printed circuit board is conveyed in a predetermined direction.

Based on this assumption, when the printed circuit board on which the electronic component is placed is carried into the reflow apparatus by the adhesive force of the applied cream solder, the printed circuit board is conveyed by the mesh belt. Next, preheating is performed by a preheating heater, and then the cream solder is reflowed by the reflow heater, the electronic component and the printed board are soldered, and then cooled by the cooling device. Soldering is completed by these reflow processes.

Furthermore, in connection with this type of reflow apparatus, Patent Document 3 discloses a soldering method and a soldering apparatus. This soldering apparatus includes a tunnel-type heating furnace and an air curtain, and performs a soldering process between workpieces such as an electronic component and a substrate. The heating furnace has a nitrogen atmosphere chamber and a hydrogen atmosphere chamber, and an air curtain is provided at a portion serving as a work entrance / exit in the heating furnace. The nitrogen atmosphere chamber is filled with nitrogen gas, and the workpieces are soldered. The air curtain functions to prevent outside air from flowing in from the entrance / exit, to prevent inflow of dust and the like into the nitrogen atmosphere chamber, and to prevent outflow of nitrogen gas from the inside of the nitrogen atmosphere chamber to the outside.

The hydrogen atmosphere chamber is a room where the work can be taken in and out, arranged so as to be separated from the nitrogen atmosphere chamber. The hydrogen atmosphere chamber is filled with hydrogen gas to reduce the workpiece. Hydrogen gas is filled only in the hydrogen atmosphere chamber. The conveyance mechanism continuously conveys the workpiece from the nitrogen atmosphere to the hydrogen atmosphere and from the hydrogen atmosphere to the nitrogen atmosphere. On the premise of this, the work that has been reduced in a hydrogen atmosphere is soldered in a nitrogen atmosphere.

If the soldering apparatus is configured in this way, a high-quality soldering process in which an oxide (oxide film) is removed can be performed. The amount of hydrogen gas used can be reduced to the minimum amount necessary for the workpiece reduction process. This simplifies the structure of the soldering device, reduces the size, and improves the heating / cooling efficiency of the solder or workpiece.

Japanese Patent Laid-Open No. 2001-230538 (6th page, FIG. 1) Japanese Patent Laid-Open No. 01-118369 (page 3, Fig. 2) Japanese Patent Laid-Open No. 10-202362 (page 3, FIG. 1)

By the way, according to the soldering apparatus according to the conventional example, the air curtain is introduced into the carry-out portion of the jet soldering apparatus as seen in Patent Document 1 or the reflow furnace as seen in Patent Document 2 or Patent Document 3 or the like. There is a case. When the air curtain found in Patent Document 2 or Patent Document 3 is applied as it is, it prevents outside air from flowing in from the carry-in part or the carry-out part of the apparatus, or dust or the like in an inert atmosphere chamber such as nitrogen. Inflow can be prevented. Further, the function of preventing the outflow of nitrogen (inert) gas from the inside of the inert atmosphere chamber to the outside, that is, the function of blocking the atmosphere on the conveyance path in the air curtain area can be obtained as it is. However, since the air curtain area is always formed, the air forming the air curtain area is temporarily blocked by the printed circuit board surface as the printed circuit board passes through the air curtain area. For this reason, there is a problem that the air curtain is disturbed.

In other words, when the air curtain area is always formed, when a printed circuit board (hereinafter also simply referred to as a board) enters the air curtain area, the tip portion blocks air blowing up on the front side of the air curtain area. So it causes turbulence. Even when the substrate passes through the air curtain area, the entire air curtain causes turbulence because the substrate blocks air blow-up. When the substrate is separated from the air curtain area, the rear end portion blocks air blowing up on the rear side of the air curtain area, which may cause turbulence.

In order to solve the above-described problem, a first soldering apparatus according to claim 1 preheats a board on which an electronic component is attached, conveys the preheated board to a soldering processing unit, and An apparatus for soldering electronic components to a substrate. This soldering apparatus is provided at a predetermined position of a transport path for transporting the substrate, and passes through the air curtain area with a blower mechanism that forms an air curtain area that blows gas on the transport path to block the atmosphere. And a control unit that controls the blower mechanism so as to send or stop the gas to the air curtain area in response to the passage timing of the substrate.

According to the first soldering apparatus of the present invention, in the case of preheating the substrate on which the electronic component is attached, transporting the preheated substrate to the soldering processing unit, and soldering the electronic component to the substrate The air blowing mechanism that forms the air curtain area is provided at a predetermined position of the transport path for transporting the substrate, and blows gas on the transport path to block the atmosphere. Based on this assumption, the control unit controls the air blowing mechanism so as to send or stop the gas to the air curtain area in accordance with the passage timing of the substrate passing through the air curtain area.

This control unit can be controlled so as to stop the blowing immediately before the substrate passes through the air curtain area, stop the blowing even while the substrate passes, and restart the blowing immediately after the substrate passes through the air curtain area. Therefore, generation of turbulent flow can be prevented in preference to the function of blocking the atmosphere on the conveyance path by the blower mechanism, and the substrate can pass through the air curtain area without generating turbulent flow. .

A soldering device according to a second aspect of the present invention is the soldering apparatus according to the first aspect, wherein the air blowing mechanism controlled by the control unit is rotatable in a main body portion having an intake port and an exhaust port at predetermined positions, and in the main body portion. A fan unit that is engaged and blows out the gas sucked from the intake port from the exhaust port, and a drive unit that drives the fan unit.

A soldering device according to a third aspect of the present invention is the soldering apparatus according to the second aspect, wherein the control unit controls the driving unit to turn on the air and blows gas from the blower mechanism to the transport path to form the air curtain area. The drive unit is controlled to be off to stop the blowing of gas from the blower mechanism to the transport path.

5. The second soldering apparatus according to claim 4, wherein the substrate on which electronic components are attached is preheated, the preheated substrate is transported to a soldering processing unit, and the electronic components are soldered to the substrate. It is. The soldering apparatus is provided at a predetermined position of a transport path for transporting the substrate, and a blower mechanism that forms an air curtain area that blows gas on the transport path to block the atmosphere, and an exhaust port of the blower mechanism And a control unit that controls the shutter mechanism so as to send or stop the gas to the air curtain area corresponding to the passage timing of the substrate passing through the air curtain area. Is.

According to the second soldering apparatus of the present invention, in the case of preheating the substrate on which the electronic component is attached, transporting the preheated substrate to the soldering processing unit, and soldering the electronic component to the substrate The air blowing mechanism that forms the air curtain area is provided at a predetermined position of the transport path for transporting the substrate, and blows gas on the transport path to block the atmosphere. On the premise of this, the control unit controls the shutter mechanism so as to send or stop the gas to the air curtain area corresponding to the passage timing of the substrate passing through the air curtain area.

By this control, it is possible to prevent the air flow just before the substrate passes through the air curtain area, block the air flow even while the substrate passes, and restart the air flow immediately after the substrate passes through the air curtain area. Therefore, generation of turbulent flow can be prevented in preference to the function of blocking the atmosphere on the conveyance path by the shutter mechanism, and the substrate can pass through the air curtain area without generating turbulent flow. .

According to a fifth aspect of the present invention, there is provided the soldering apparatus according to the fourth aspect, wherein the shutter mechanism that is controlled to be opened and closed by the control unit includes a shutter unit that closes or opens an exhaust port of the blower mechanism, and opens and closes the shutter unit. And a driving unit for driving.

The soldering device according to claim 6 is the soldering device according to claim 5, wherein the control unit controls the driving unit to turn on and the shutter unit is opened to blow gas from the blowing mechanism to the conveyance path. In addition to forming an air curtain area, the drive unit is controlled to be off, and the shutter unit is closed to prevent the blowing of gas from the blowing mechanism to the conveyance path.

The soldering device according to claim 7 is provided with a detection unit that detects the substrate that is input to the transfer path and outputs substrate input information according to any one of claims 1 to 6, and the control unit includes: Substrate length information indicating the length of the substrate in the conveyance direction based on the substrate loading information output from the detection unit, and the elapsed time from the time when the substrate is loaded into the conveyance path to the arrival of the air curtain area Substrate arrival information to be displayed, and substrate removal information to indicate the time at which the substrate leaves the air curtain area.

A soldering apparatus according to an eighth aspect of the present invention is the soldering apparatus according to any one of the first to seventh aspects, wherein air, an inert gas, or a mixed gas thereof is introduced into the main body of the blower mechanism.

The first soldering apparatus according to the present invention includes a control unit that controls a blower mechanism that is provided at a predetermined position in the transport path and blows gas. This control unit controls to send or stop the gas to the air curtain area in accordance with the passage timing of the substrate passing through the air curtain area.

With this configuration, the control unit can control to stop the blowing immediately before the substrate passes through the air curtain area, stop the blowing even while the substrate passes, and resume the blowing immediately after the substrate passes through the air curtain area. . Therefore, generation of turbulent flow can be prevented in preference to the function of blocking the atmosphere on the conveyance path by the blower mechanism, and the substrate can pass through the air curtain area without generating turbulent flow. .

The second soldering apparatus according to the present invention includes a control unit that controls a shutter mechanism provided at an exhaust port of a blowing mechanism for blowing gas to form an air curtain area. This control unit controls the shutter mechanism so as to send or block the gas to the air curtain area in accordance with the passage timing of the substrate passing through the air curtain area.

With this configuration, the control unit can control the air flow immediately before the substrate passes through the air curtain area, the air flow during the substrate passage, and the air flow restart immediately after the substrate passes through the air curtain area. . Therefore, generation of turbulent flow can be prevented in preference to the function of blocking the atmosphere on the conveyance path by the blower mechanism, and the substrate can pass through the air curtain area without generating turbulent flow. .

This makes it possible to provide a jet soldering device with a blower mechanism having a turbulent flow prevention function, a reflow device, and the like. Note that the atmosphere includes an atmosphere containing an inert gas such as nitrogen gas (described as a nitrogen gas atmosphere or an inert gas atmosphere), or an atmosphere not including an inert gas such as nitrogen gas (simply described as an atmosphere). It expresses the concept of

It is a conceptual diagram which shows the structural example of the jet soldering apparatus 100 as embodiment which concerns on this invention. It is a perspective view which shows the structural example of the air blower 904 in the ventilation mechanism 99. FIG. It is a disassembled perspective view which shows the assembly example of the air blower 904. FIG. It is sectional drawing which shows the operation example of the air blower 904. FIG. It is a block diagram which shows the structural example of the control system of the jet soldering apparatus. It is a block diagram which shows the control example (the 1) of the ventilation mechanism 99 as a 1st Example. It is a block diagram which shows the control example (the 2) of the ventilation mechanism 99 as a 1st Example. It is a block diagram which shows the control example (the 3) of the ventilation mechanism 99 as a 1st Example. It is a block diagram which shows the control example (the 4) of the ventilation mechanism 99 as a 1st Example. (A) thru | or (E) are the operation | movement timing charts which show the example of control of the air blower 904. FIG. (A) thru | or (G) are the operation | movement timing charts which show the example of control of the ventilation mechanism 99 as a 2nd Example. It is a block diagram which shows the internal structural example (the 1) of the control part 65 as a 3rd Example. It is a block diagram which shows the internal structural example (the 2) of the control part 65 as a 3rd Example. It is a flowchart which shows the other example of control of the ventilation mechanism 99. It is a table | surface figure which shows the example of information recording corresponding to the some printed circuit board as a 4th Example. It is a flowchart which shows the example of control of the ventilation mechanism 99 which concerns on a 4th Example. It is a conceptual diagram which shows the structural example of the reflow apparatus 200 as a 5th Example. It is a flowchart which shows the example of control of the two ventilation mechanisms 99a and 99b. It is explanatory drawing which shows the structural example of the shutter mechanism 950 as a 6th Example. FIG. 10 is an explanatory diagram illustrating an operation example of a shutter mechanism 950.

The present invention devised a driving method of the air blowing mechanism that forms the air curtain area, and can prevent the occurrence of turbulence in preference to the function of blocking the atmosphere on the conveyance path by the air curtain area, An object of the present invention is to provide a soldering apparatus in which a substrate can pass through an air curtain area without generating turbulent flow.

Hereinafter, a soldering apparatus as an embodiment according to the present invention will be described with reference to the drawings.

<When soldering one printed circuit board of known length>
A jet soldering apparatus 100 shown in FIG. 1 constitutes an example of a soldering apparatus, pre-heats a printed circuit board 1 (Printed circuit board: hereinafter also referred to as PCB) to which an electronic component is attached, and the printed circuit board after pre-heating. 1 is conveyed in the atmosphere of inert gas, an electronic component is soldered to the printed circuit board 1 in the atmosphere of inert gas, and the printed circuit board 1 after soldering is cooled.

In this example, the side where the printed circuit board 1 is taken into the jet soldering apparatus 100 is referred to as the upstream side, and the side where the printed board 1 is taken out is referred to as the downstream side. It is assumed that the printed circuit board 1 is transported from the upstream side to the downstream side. The conveyance direction of the printed circuit board 1 is conveyed from the left end side to the right end side as shown by a white arrow I in FIG.

The jet soldering apparatus 100 has a main body base 101. The main body frame 101 includes a transport unit 10, a heat treatment unit 20, a lid support sealing mechanism 30, a partition member 40, a chamber 50, a jet solder tank 60, a gas supply mechanism 70 at both ends, a lid unit 80, a cooling processing unit 90, and an air blower. A mechanism 99 is provided.

The main body base 101 has at least beam frame members 102 and leg portions 103 and 104 and leg portions 105 and 106 (not shown) at four corners of the beam frame member 102. The beam frame member 102 and the legs 103 to 106 are made of steel members.

On the beam frame member 102, a conveyance unit 10 that constitutes a conveyance path of the printed circuit board 1 is provided. The transport unit 10 is disposed through the chamber 50 and upstream and downstream. In order to improve the cutting of the molten solder 7, the transport unit 10 is obliquely attached to the main body base 101 with a predetermined elevation angle θ. The elevation angle θ is, for example, about 5 ° to 10 °.

The transport unit 10 transports the printed circuit board 1 attached with electronic components in the direction of the chamber 50. The transport unit 10 includes an endless chain member 11 and a plurality of L-shaped claw-shaped transport chucks 12. The chain members 11 are provided on both sides of the printed board 1 in the conveyance direction. The conveyance chuck 12 is attached to the chain member 11 at a predetermined arrangement pitch. The printed circuit board 1 is set so as to be transported with the printed circuit board 1 sandwiched between the transport chucks 12 on both sides.

A heat treatment section 20 is provided on the upstream side of the chamber 50. The heat treatment part 20 has an opening 201 in the upper part, and heats the printed circuit board 1. The opening 201 covers the area where the printed board 1 is conveyed with a lid. In the case of this example, the opening 201 is closed with a plurality of predetermined lids 31, 32, 33, 34. That is, the heat treatment unit 20 has a tunnel shape for transporting the printed circuit board 1. For example, the printed circuit board 1 to which electronic components are attached is heated to a predetermined temperature by a panel heater or heated by a far infrared heater. As hot air that circulates an atmosphere of air, inert gas, or the like with a fan, the hot air is used for heating.

In this example, the heat treatment unit 20 is provided so as to cover the upstream conveyance unit 10 with respect to the chamber 50. A substrate carry-in port 202 is provided on the most upstream side of the heat treatment unit 20. The printed circuit board 1 is set in the transport unit 10 at the board carry-in port 202. The substrate detection sensor 18 is disposed at the substrate carry-in port 202. The PCB detection data D18 is generated by detecting the printed circuit board 1 set in the transport unit 10 at the board carry-in port 202. The PCB detection data D18 is output to the control unit 65 shown in FIG. The heat treatment section 20 is composed of, for example, four preheating zones 21, 22, 23, and 24 (preheater zones).

In the heat treatment section 20, the preheating zones 21 to 24 each form a heating atmosphere in order to gradually heat the printed circuit board 1 to which electronic components are attached and to heat the printed circuit board 1 to an optimal soldering temperature. A substrate communication port 203 reaching the chamber 50 is provided on the downstream side of the heat treatment unit 20. The transport unit 10 transports the pre-heated printed circuit board 1 through the substrate communication port 203 and into the chamber 50. The heat treatment unit 20 is provided with a lid support sealing mechanism 30. The lid support sealing mechanism 30 supports the lids 31, 32, 33, and 34 to seal the opening 201.

In this example, the lid members 31 and 34 are provided with partition members 40. The partition member 40 includes a plurality of labyrinth portions 43. The labyrinth unit 43 prevents dust and the like from entering the heat treatment unit 20 from the outside, and prevents leakage of nitrogen gas from the chamber 50 to the outside.

A chamber 50 (processing vessel) is connected to the substrate communication port 203 of the heat treatment unit 20. In the chamber 50, an inert gas is introduced to form an inert gas atmosphere. Nitrogen gas (N ₂ ) or argon gas (Ar) is generally used as the inert gas. The chamber 50 solders electronic components to the printed circuit board 1 in an inert gas atmosphere.

Below the chamber 50, a jet solder bath 60 is provided. The jet solder bath 60 accommodates the molten solder 7 heated to a predetermined temperature. The jet solder bath 60 jets molten solder 7 in an atmosphere of nitrogen gas, and solders electronic components to the printed circuit board 1. The jet solder bath 60 has two systems of jet nozzles 61 and 62. The ejection nozzles 61 and 62 are arranged side by side in the transport direction of the printed circuit board 1.

The upstream ejection nozzle 61 is used during a primary soldering process in which solder is roughly jetted and soldered. The jet nozzle 62 on the downstream side is used for a secondary soldering process (for finishing) in which solder is finely jetted and soldered. The jet solder bath 60 is configured by, for example, forming a stainless (SUS) plate into a box shape. A jet pump (hereinafter simply referred to as pumps 8 and 9) is provided in the jet solder bath 60. As the pumps 8 and 9, for example, a screw pump having a plurality of blades, preferably four or more blades is used.

The pump 8 is driven by a motor 68 to supply the molten solder 7 accommodated in the jet solder bath 60 to the jet nozzle 61 with a predetermined pressure. The pump 9 is driven by a motor 69 and supplies the molten solder 7 accommodated in the jet solder bath 60 to the jet nozzle 62 at a predetermined pressure. The molten solder 7 ejected from the ejection nozzles 61 and 62 is controlled by a jet solder driving unit 66 shown in FIG. The chamber 50 and the jet solder bath 60 constitute a soldering processing unit.

In this example, a gas supply mechanism 70 at both ends is provided below the main body frame 101 and adjacent to the jet solder bath 60. The both-end gas supply mechanism 70 ejects, for example, nitrogen gas (N ₂ ) onto the liquid surface of the jet solder bath 60 and forms a nitrogen gas atmosphere on the side where the electronic components are soldered. The both-end gas supply mechanism 70 includes, for example, gas supply units 71 and 72, an N2 gas tank 74, and a nozzle conduit 75. One end of each of the gas supply units 71 and 72 is connected to the N2 gas tank 74.

The other end of the gas supply unit 71 is connected to one end of the nozzle conduit 75, and the other end of the gas supply unit 72 is connected to the other end of the nozzle conduit 75. The gas supply units 71 and 72 individually adjust the nitrogen gas for making the nitrogen gas atmosphere on the liquid surface of the jet solder bath 60 via the nozzle conduit 75. The gas supply unit 73 adjusts the flow rate of nitrogen gas for making the inside of the chamber 50 a nitrogen gas atmosphere.

In the present example, a lid unit 80 is detachably attached above the chamber 50 so as to close (cover) the opening 501 on the chamber 50. The lid unit 80 has an atmosphere inlet / outlet 801 and an atmosphere outlet 802.

The atmosphere cleaning unit 81 is connected to the atmosphere inlet 801 and the atmosphere outlet 802. The atmosphere inlet 801 is a part for feeding nitrogen gas after the flux fume is removed by the atmosphere cleaning unit 81 into the chamber 50. The atmosphere discharge port 802 is a portion that discharges nitrogen gas containing flux fume in the chamber 50 to the atmosphere cleaning unit 81.

The atmosphere cleaning unit 81 cleans the nitrogen gas containing flux fumes discharged from the atmosphere discharge port 802, and circulates the atmosphere so as to supply the cleaned nitrogen gas to the atmosphere inlet 801 ( A blower) 813. For example, the atmosphere cleaning unit 81 includes a casing 83 having an atmosphere inlet 803 and an atmosphere outlet 804, and a plurality of pipes 82 provided in the casing 83. Air (cold air) is ventilated inside the pipe 82.

The nitrogen gas atmosphere (nitrogen gas + atmosphere) containing this flux fume is introduced into the housing 83, and when passing through the outside of the pipe 82, the flux fume strikes the pipe 82 and is cooled, and the flux fume is condensed (condensed). And adheres to the outside of the pipe 82. As a result, the flux fume and the nitrogen gas atmosphere can be separated.

A cooling processing unit 90 is provided on the downstream side of the chamber 50. For example, the cooling processing unit 90 is provided so as to cover the transport unit 10 on the downstream side with respect to the chamber 50. The above-described transport unit 10 transports the printed circuit board 1 after the soldering process to the cooling processing unit 90. The cooling processing unit 90 cools the printed circuit board 1 to which the electronic component is soldered that is transported by the transport unit 10.

The cooling processing unit 90 has an opening 901 at the top, and the opening 901 is closed by a plurality of predetermined lids 91 and 92, and the cooling processing unit 90 forms a tunnel shape. The lids 91 and 92 are provided with a partition member 40, and a lid support sealing mechanism 30 is provided between the opening 901 and the lids 91 and 92.

The cooling processing unit 90 is provided with an air cooling fan (not shown), and a cooling process is performed on the printed circuit board 1 by blowing nitrogen gas or cold air onto the upper and lower surfaces of the printed circuit board 1 to which electronic components are attached. A substrate carry-out port 902 extending to the outside is provided on the downstream side of the cooling processing unit 90. The printed circuit board 1 after cooling is taken out from the board carry-out port 902.

The substrate carry-out port 902 is provided with a blower mechanism 99 that forms an air curtain area 927, and blows gas on the transfer path to block the atmosphere. This gas includes air, an inert gas, or a mixed gas thereof, and any one of them is introduced onto the transport path, and an air curtain area 927 is formed by a wide film-like blowing airflow. The blower mechanism 99 includes a blower 904 such as a cross flow fan (Cross Flow Fan), a lower guide plate 905, and an upper guide plate 906.

The blower 904 is attached to the main body base 101. The lower guide plate 905 is provided below the transport unit 10, and the upper guide plate 906 is provided above the transport unit 10. The lower guide plate 905 and the upper guide plate 906 have substantially the same length as the width direction of the transport unit 10, and the inner surface has, for example, an R shape. Of course, the lower guide plate 905 and the upper guide plate 906 may be L-shaped or straight. The lower guide plate 905 and the upper guide plate 906 are made of a metal member such as stainless steel or an iron plate, or a hard resin.

Here, a configuration example of the blower 904 will be described with reference to FIG. A blower 904 shown in FIG. 2 includes a motor 96, a casing 913, a reinforcing member 914, a right side plate 915, a left side plate 917, and a fan portion 919, and constitutes a once-through fan, a multiblade fan, or the like. Of course, a fan cover 910 as shown in FIG. 3 is also included in the configuration.

The fan cover 910, the casing 913, the reinforcing member 914, the right side plate 915 and the left side plate 917 constitute a main body of the blower 904. The main body is provided with an intake port 911 (see FIG. 3) and an exhaust port 912 at predetermined positions. The fan part 919 is rotatably engaged in the main body part.

In this example, the right side plate 915 is provided with a bearing portion 916, and the left side plate 917 is provided with a bearing portion 918. The right side plate 915 and the left side plate 917 are formed by bending an iron plate outward in a pentagonal shape, for example. A fan portion 919 is rotatably engaged between the right side plate 915 and the left side plate 917. The right side plate 915 is provided with openings 956 and 957. The opening 956 and the like function so as to allow air to escape when the exhaust port 912 is blocked.

The fan unit 919 has the same forward-facing blades as the sirocco fan. The fan unit 919 has an impeller shape in which the blade width is larger than the diameter, and the airflow is sucked from the direction perpendicular to the axis. The fan portion 919 includes a shaft portion 921 and a shaft portion 922. One shaft portion 921 of the fan portion 919 is rotatably engaged with the bearing portion 916, and the other shaft portion 922 is rotatably engaged with the bearing portion 918.

In the blower 904, a casing 913 and a reinforcing member 914 are disposed between the right side plate 915 and the left side plate 917. The casing 913 and the reinforcing member 914 constitute an exhaust port 912. The casing 913 has a J-shaped cross section for restricting the flow. The casing 913 is formed by bending an iron plate. The reinforcing member 914 has a concave cross section in order to restrict the flow together with the casing 913. The reinforcing member 914 is also formed by bending an iron plate.

A motor 96 is connected (directly connected) to the shaft portion 922 of the fan unit 919, and operates to rotate the fan unit 919 in a predetermined direction. These constitute the blower 904. In the blower 904, the gas flow can flow in a plane perpendicular to the rotation axis, and the exhaust port 912 can be set long in the axial direction. Further, the wind speed is obtained from the exhaust port 912 toward the exhaust duct 907.

Subsequently, an assembly example of the blower 904 will be described with reference to FIG. First, a motor 96, a casing 913, a reinforcing member 914, a right side plate 915, a left side plate 917, and a fan unit 919 are prepared. There are several methods for assembling the blower 904. For example, the motor 96 is first attached to the outside of the left side plate 917 and fixed with screws or the like. The motor 96 is disposed so that the motor shaft 961 faces the fan unit 919 side.

The fan part 919 is an impeller having a shaft part 921 and a shaft part 922 at both ends. The shaft portion 922 is prepared, for example, having a hole portion into which the motor shaft 961 can be fitted at its center position. Then, the shaft portion 922 of the fan portion 919 is fitted to the bearing portion 918 of the left side plate 917 and the shaft portion 922 is connected to the motor shaft 961. As a connection method, for example, the motor shaft 961 is fitted into a hole inside the shaft portion 922 and the motor shaft 961 is fixed from the outside of the shaft portion 922 with a screw or the like.

Of course, this is not a limitation. For example, the cross section of the motor shaft 961 is processed into a polygonal shape or a D shape, the cross section of the hole portion of the shaft portion 922 is processed into a polygonal shape, a D shape, or the like. A method of fitting a shaft hole with a polygonal cross section of 922 or a method of fitting a motor shaft 961 with a D shape in section and a shaft hole with a D shape in cross section of the shaft portion 922 may be adopted. Screws from the outside can be omitted.

Thereafter, the shaft portion 921 of the fan portion 919 is fitted to the bearing portion 916 of the right side plate 915. A casing 913 and a reinforcing member 914 are disposed between the right side plate 915 and the left side plate 917. One end of the casing 913 and the reinforcing member 914 abuts on the right side plate 915 and is fixed.

On the other hand, the other ends of the casing 913 and the reinforcing member 914 are brought into contact with and fixed to the left side plate 917. A fan cover 910 having a U-shaped cross section is prepared. For example, the fan cover 910 is formed by bending an iron plate. A fan cover 910 having a slit-like air inlet 911 is used. For example, the air inlet 911 is formed by punching the fan cover 910.

Then, the fan cover 910 is positioned and attached to the right side plate 915 and the left side plate 917, and the fan cover 910 is fixed to the right side plate 915 and the left side plate 917 with screws (not shown) to complete the blower 904.

Subsequently, an operation example of the blower mechanism 99 will be described with reference to FIG. A blower 904 shown in FIG. 4 is attached to a cooling unit mounting base 908 below the transport unit 10 and constitutes a part of the blower mechanism 99. The blower mechanism 99 is controlled by the control unit 65 shown in FIG. In the figure, the white arrow indicates the direction of air flow. In this example, the motor 96 shown in FIG. 2 rotates the fan unit 919 in the clockwise direction. By this rotation, the air sucked from the air inlet 911 of the fan cover 910 is guided to the casing 913 and guided to the exhaust duct 907 via the exhaust port 912. The air is blown out above the exhaust duct 907 (see white arrow).

For example, the blower 904 blows air upward from the exhaust port 912. The air once passes through the conveyance path of the printed circuit board 1 once. Thereafter, as shown in FIG. 1, the left side portion 906a of the upper guide plate 906 once guides the air received from the blower 904 toward the substrate carry-out port 902, that is, in the direction of conveyance of the printed circuit board 1 (right arrow in the figure). See). After that, the right side portion 906b of the upper guide plate 906 directs the air downward and guides the conveyance path of the printed circuit board 1 again. The lower guide plate 905 guides air received from above so as to face upward.

In this way, the air blowing mechanism 99 forms the air curtain area 927 by convection of air to the substrate carry-out port 902. In the air curtain area 927, air from the blower 904 to the left side 906 a of the upper guide plate 906 is transferred from the right side 906 b of the upper guide plate 906 to the lower guide plate 905, and further from the lower guide plate 905 to the upper guide plate 906. The left curtain 906a is formed by forming an air curtain with convection air.

This air blowing mechanism 99 forms an air curtain area 927 in which air convects (circulates) between the lower guide plate 905 and the upper guide plate 906, so that dust or the like can be prevented from entering the cooling processing unit 90 from the outside. At the same time, leakage of nitrogen gas from the inside of the chamber 50 to the outside can be prevented. As a result, nitrogen gas resources can be used efficiently.

In addition, since air is sent out or stopped in accordance with the passage timing of the printed circuit board 1 passing through the air curtain area 927, priority is given to the function of blocking the atmosphere on the conveyance path by the air curtain area 927. Thus, generation of turbulent flow can be prevented.

In the case of this example, the air blown out from the blower 904 is once led to the substrate carry-out port 902 side by the upper guide plate 906 (left side portion 906a). For this reason, from the outside into the furnace through the substrate carry-out port 902 This is preferable because the function of suppressing the intrusion of air becomes more remarkable.

However, even when the air blown from the blower 904 is blown to the jet solder bath 60 side opposite to the board carry-out port 902, the air (air) is between the lower guide plate 905 and the upper guide plate 906. Convection (circulation). Accordingly, dust and the like can be prevented from entering the cooling processing unit 90 from the outside, and leakage of nitrogen gas from the chamber 50 to the outside can be prevented. As a result, nitrogen gas resources can be used efficiently.

In addition, the air curtain area 927 in this example is circulated. However, as disclosed in Patent Document 2, Patent Document 3, and the like, the air curtain area 927 is air that blows in one direction without being circulated. May be formed.

Subsequently, a configuration example of a control system of the jet soldering apparatus 100 will be described with reference to FIG. According to the control system of the jet soldering apparatus 100 shown in FIG. 5, in addition to the input unit 64 and the supply control unit 605, the conveyance drive unit 14, the monitor 16, the substrate detection sensor 18, the preheating drive unit 25, the control unit 65, A jet solder driving unit 66, a cooling driving unit 93, an air curtain driving unit 95, and a fume removal driving unit 97 are provided. These are connected to the control unit 65.

The monitor 16 displays a setting screen related to the jet soldering process based on the display data D16. As the monitor 16, for example, a liquid crystal display device with a touch panel is used. The touch panel constitutes a part of the input unit 64. The input unit 64, for example, as described later, setting of operating conditions such as a single wafer processing mode in which printed circuit boards are put into a soldering apparatus one by one, a continuous processing mode to be periodically inserted, setting of fume removal control, This is for inputting setting information (hereinafter referred to as setting data D65) such as height information and mounting distribution information of electronic components mounted on the printed circuit board. Accordingly, the display data D16 includes information on the height of the electronic component soldered to the printed circuit board 1, mounting distribution information of the electronic component soldered to the printed circuit board 1, and the like. In addition, information on the number of substrates to which electronic components are soldered, setting data D65 indicating soldering processing conditions, and the like are also included.

The control unit 65 outputs the conveyance drive data D14 generated based on a predetermined control program to the conveyance drive unit 14 and executes conveyance control. Similarly, the preheating control data D25 is output to the preheating drive unit 25 to execute the preheating control. Similarly, the solder bath control data D66 is output to the jet solder driving unit 66 to execute jet solder control. Similarly, the cooling control data D93 is output to the cooling drive unit 93 to execute the cooling control.

Similarly, the control unit 65 outputs the curtain control data D95 to the air curtain drive unit 95 to execute motor control. The control unit 65 controls the air blowing mechanism 99 so as to send or stop air in accordance with the passage timing of the printed circuit board 1 that passes through the air curtain area 927.

Similarly, the fume removal control data D97 is output to the fume removal drive unit 97 to execute motor control. Similarly, the mounting distribution data D64 is output to the supply control unit 605 to execute nitrogen gas supply control.

The transport drive unit 14 generates a motor control signal S15 based on the transport drive data D14 input from the control unit 65. A motor 15 that drives the transport unit 10 is connected to the transport drive unit 14. The motor 15 inputs the motor control signal S15 and drives the chain member 11 and the like. The printed circuit board 1 set on the conveyance chuck 12 of the chain member 11 is sequentially conveyed into the chamber 50 through the preheating zones 21, 22, 23, 24, and the like.

The substrate detection sensor 18 is connected to the control unit 65. The substrate detection sensor 18 outputs PCB detection data D18 obtained by detecting the printed circuit board 1 set in the transport unit 10 at the substrate carry-in port 202 to the control unit 65. The PCB detection data D18 includes, for example, the time when the leading edge of the printed circuit board 1 is detected. The substrate detection sensor 18 is a reflection type or transmission type optical sensor.

In addition to the substrate detection sensor 18, for example, the arrival detection sensor 19 and the drop detection sensor 39 are connected to the control unit 65 depending on the embodiment described below. The arrival detection sensor 19 is arranged on the head portion side (upstream side) of the air curtain area 927 and detects the printed circuit board 1 immediately before reaching the air curtain area 927 to indicate arrival detection information (arrival detection below). Data D19) is output to the controller 65.

The missing detection sensor 39 is arranged on the rear end side (downstream side) of the air curtain area 927 and detects the printed circuit board 1 immediately after coming out of the air curtain area 927 to show missing detection information (hereinafter referred to as missing detection data). D39) is output to the control unit 65. As the arrival detection sensor 19 and the missing detection sensor 39, an optical sensor such as a reflection type or a transmission type is used.

The preheating drive unit 25 generates heat generation control signals S21 to S24 based on the preheating control data D25 input from the control unit 65. A plurality of heaters 26 to 29 (heating elements) are connected to the preheating drive unit 25. In this example, the heaters 26 to 29 are arranged in four preheating zones 21 to 24 (see FIG. 1). The preheating zone 21 shown in FIG. 1 is provided with a heater 26 and generates heat based on the heat generation control signal S21. A heater 27 is provided in the preheating zone 22 and generates heat based on the heat generation control signal S22. A heater 28 is provided in the preheating zone 23 and generates heat based on the heat generation control signal S23. A heater 29 is provided in the preheating zone 24 and generates heat based on the heat generation control signal S24. The printed circuit board 1 is preheated by these heat generations.

The jet solder driving unit 66 generates a heat generation control signal S67 and motor control signals S68 and S69 based on the solder bath control data D66 input from the control unit 65. A heater 67 and two motors 68 and 69 are connected to the jet solder driving unit 66. The heater 67 generates heat based on the heat generation control signal S67 and heats the jet solder bath 60 to a predetermined temperature. The motor 68 jets the molten solder 7 to the jet nozzle 61 based on the motor control signal S68. The motor 69 causes the molten solder 7 to jet through the jet nozzle 62 based on the motor control signal S69.

The cooling drive unit 93 generates a motor control signal S94 based on the cooling control data D93 input from the control unit 65. A fan motor 94 is connected to the cooling drive unit 93. The motor 94 rotates a fan (not shown) based on the motor control signal S94. Thereby, the printed circuit board 1 after soldering an electronic component is cooled.

The air curtain drive unit 95 generates a motor control signal S96 based on the curtain control data D95 input from the control unit 65. The air curtain drive unit 95 is connected to a blower motor 96 that constitutes an example of the drive unit. The motor 96 rotates the fan unit 919 shown in FIGS. 1 to 4 based on the motor control signal S96.

The control unit 65 always controls the motor 96 to be turned on to blow gas from the blower mechanism 99 to the transport path, and controls the motor 96 to be turned off based on the PCB detection data D18 obtained from the substrate detection sensor 18. The air curtain driving unit 95 is controlled so as to stop the air from the mechanism 99 to the conveyance path.

Thereby, a convection (circulating) air curtain can be formed at the board carry-out port 902 at a timing when the printed circuit board 1 does not pass through the air curtain area 927. In addition, since the air is controlled to be sent out or stopped in accordance with the passage timing of the printed circuit board 1 passing through the air curtain area 927, it has priority over the function of blocking the atmosphere on the conveyance path by the air curtain area 927. Therefore, the generation of turbulent flow can be prevented.

Further, the fume removal driving unit 97 generates a motor control signal S98 based on the fume removal control data D97 input from the control unit 65. A motor 98 for driving the pump is connected to the fume removal driving unit 97. The motor 98 drives the pump shown in FIG. 1 based on the motor control signal S98. Thereby, the nitrogen gas from which the flux fumes have been removed can be fed into the chamber 50.

The supply control unit 605 generates supply control signals S71, S72, S73, and S74 based on the mounting distribution data D64 input from the control unit 65, the N2 concentration detection signal S17 output from the N2 sensor (not shown), and the like. Four gas supply units 71, 72, 73 and 741 are connected to the supply control unit 605. The gas supply unit 71 adjusts the supply pressure of nitrogen gas to P1 based on the supply control signal S71. The gas supply unit 72 adjusts the supply pressure of nitrogen gas to P2 based on the supply control signal S72. As a result, the nitrogen gas supplied to the nozzle conduit 75 can be adjusted.

The gas supply unit 73 adjusts the supply pressure of nitrogen gas to P3 based on the supply control signal S73. Further, the gas supply unit 741 adjusts the supply pressure of nitrogen gas to P4 based on the supply control signal S74. Thereby, in the cooling process part 90, the cooling process with respect to the said printed circuit board 1 is performed by spraying nitrogen gas on the upper and lower surfaces of the printed circuit board 1 which attached the electronic component. These constitute the control system of the jet soldering apparatus 100.

Subsequently, a control example of the blower 904 as the first embodiment will be described with reference to FIGS. 1 to 5 and FIGS. 6A to 6D. In this embodiment, the air curtain area 927 formed in the vicinity of the board carry-out port 902 of the jet soldering apparatus 100 is always reached by arrival detection data D19 and drop detection data D39 obtained from the arrival detection sensor 19 and the drop detection sensor 39. An example of controlling the blower mechanism 99 based on the above will be described. Assume that a transmissive optical sensor is used for the arrival detection sensor 19 and the drop detection sensor 39. The printed circuit board 1 is set in the transport unit 10 and transported so as to move from a left end to a right end in a predetermined transport direction, in this example.

In FIG. 6A, x is the length of the printed board 1 in the transport direction. The length x of the printed circuit board 1 is, for example, about x = 350 mm. L is the length of the jet soldering apparatus 100 in the transport direction. The length L of the jet soldering apparatus 100 is, for example, about L = 5145 mm. Lc is the length of the air curtain area 927 in the transport direction. The length Lc of the air curtain area 927 is, for example, about 400 mm. V is the conveyance speed of the printed circuit board 1 and is, for example, about 0.2 to 0.5 m / min.

In the case of this example, the arrival detection sensor 19 disposed on the head side (upstream side) of the air curtain area 927 is printed circuit board when the output of the arrival detection sensor 19 changes from high level to low level due to arrival of the printed circuit board 1. Even after 1 passes the arrival detection sensor 19, the low level is maintained. The reason why the output of the arrival detection sensor 19 returns from the low level to the high level is that the arrival detection sensor 19 is reset triggered by the fact that the output of the missing detection sensor 39 described later has changed from the low level to the high level. To be done.

The omission detection sensor 39 disposed on the rear end side (downstream side) of the air curtain area 927 has an output from the omission detection sensor 39 that changes from a high level to a low level when the printed circuit board 1 arrives. The printed circuit board 1 coming out of the circuit is detected, and the output of the detection sensor 39 outputs the logic value from the low level to the high level to the control unit 65 as the missing detection data D39.

That is, in the case of this example, when both the output of the arrival detection sensor 19 and the missing detection sensor 39 are at a high level, the air curtain area 927 is formed, and the output of either the arrival detection sensor 19 or the missing detection sensor 39 is low. At the level, the air curtain area 927 is not formed.

In this example, when the board is loaded, the board detection sensor 18 shown in FIG. 6A detects the printed board 1 set in the transport unit 10 at the board carry-in port 202 shown in FIG. 1, and the PCB detection data D18 is shown in FIG. It outputs to the control part 65 shown. The PCB detection data D18 includes, for example, the time when the leading edge of the printed circuit board 1 is detected.

At this time, the arrival detection sensor 19 arranged on the leading side (upstream side) of the air curtain area 927 uses the arrival detection data D19 indicating that the substrate has not reached since the printed circuit board 1 has not reached the air curtain area 927. Output to the control unit 65. The arrival detection data D19 indicating that the substrate has not reached indicates a high-level logical value because a transmission type optical sensor is used as the arrival detection sensor 19.

Also, the missing detection sensor 39 arranged on the rear end side (downstream side) of the air curtain area 927 has not detected the printed circuit board 1 coming out of the air curtain area 927, so the missing detection data D39 indicating that the board has not been detected. Is output to the control unit 65. The missing detection data D39 indicating that the substrate has not been detected indicates a high level logical value because a transmission type optical sensor is used as the missing detection sensor 39.

The control unit 65 controls the blower mechanism 99 based on arrival detection data D19 indicating that the substrate has not been reached and missing detection data D39 indicating that the substrate has not been detected. The air blowing mechanism 99 forms air curtain areas 927 by convection of air to the substrate carry-out port 902 shown in FIG. The air curtain area 927 is formed by air blown from the exhaust port 912 (see FIGS. 1 to 5).

Then, the printed circuit board 1 shown in FIG. 6A is conveyed by the conveying unit 10 shown in FIG. 1 so as to move from the left end to the right end, and immediately before the printed circuit board 1 shown in FIG. 6B enters the air curtain area 927. To the state of. When the printed circuit board 1 enters the air curtain area 927 from the state immediately before the entry, the arrival detection sensor 19 detects the tip of the printed circuit board 1 until the printed circuit board 1 goes out of the detection range of the arrival detection sensor 19. For example, arrival detection data D19 indicating the arrival of the substrate is generated. The arrival detection data D19 indicating the arrival of the substrate indicates, for example, a low-level logical value and maintains this state.

Note that, since the missing detection sensor 39 has not detected the printed circuit board 1 immediately after coming out of the air curtain area 927 at this time, the missing detection data D39 indicating that no board is detected is output to the control unit 65.

The control unit 65 controls the blower mechanism 99 based on arrival detection data D19 indicating the arrival of the substrate and missing detection data D39 indicating that the substrate has not been detected. The air blowing mechanism 99 is changed from the formation state of the air curtain area 927 shown in FIG. 6A to the non-formation state as shown in FIG. 6B. The air blowing mechanism 99 stops air blowing. Since air is not blown out from the exhaust port 912, the air curtain area 927 is not formed.

Furthermore, according to the state in which the printed circuit board 1 shown in FIG. 6C is passing through the air curtain area 927, the arrival detection sensor 19 still detects the printed circuit board 1, and the printed circuit board 1 remains in the detection range of the arrival detection sensor 19. Even if the process exits, arrival detection data D19 indicating that the substrate is being detected is generated as described above. The arrival detection data D19 indicating that the substrate is being detected also indicates a low level logical value.

When the printed circuit board 1 enters the detection range of the missing detection sensor 39, missing detection data D39 indicating that the air curtain area 927 is passing is generated. The missing detection data D39 indicating that the air curtain area 927 is passing indicates a low level logical value. Omission detection data D39 indicating that the air curtain area 927 is passing is output to the control unit 65.

The control unit 65 controls the blower mechanism 99 based on the arrival detection data D19 indicating that the substrate is being detected and the missing detection data D39 indicating that the air curtain area 927 is passing. The air blowing mechanism 99 leaves the air curtain area 927 in the non-formed state in the same manner as in FIG. 6B. The blower mechanism 99 remains stopped from blowing air. Since air is not yet blown out from the exhaust port 912, the air curtain area 927 is maintained in a non-formed state.

The missing detection sensor 39 generates missing detection data D39 indicating that the printed circuit board 1 is passing until the printed circuit board 1 passes through the air curtain area 927. When the printed board 1 passes through the air curtain area 927 and the missing detection sensor 39 detects the trailing edge of the printed board 1, the missing detection data D39 indicating that the board is missing changes from a low level logical value to a high level logical value. .

Triggered by a change from the low level logical value of the missing detection data D39 to the high level logical value, the low level logical value of the arrival detection data D19 is reset to the high level logical value, and the arrival detection data indicating that the substrate is not detected D19 and missing detection data D39 indicating substrate missing are output to the controller 65.

The control unit 65 controls the blower mechanism 99 based on the arrival detection data D19 indicating that the board is not detected and the missing detection data D39 indicating that the board is missing. The blower mechanism 99 convects air to the substrate carry-out port 902 and resumes the formation of the air curtain area 927. Since the air blowing mechanism 99 resumes air blowing, air is blown out from the exhaust port 912, and the air curtain area 927 is formed (see FIGS. 1 to 5).

Subsequently, another control example of the blower 904 according to the first embodiment will be described with reference to (A) to (E) of FIG. In this example, the arrival detection sensor 19 and the drop detection sensor 39 shown in FIGS. 6A to 6D are omitted, and the air blowing area 99 is operated when the power is turned on to always form the air curtain area 927.

In this case, from the time when the printed circuit board 1 is put into the jet soldering apparatus 100 (corresponding to the leading edge detection time), it is calculated from the transport speed of the substrate and the distance from the substrate detection sensor 18 to the air curtain position. An example will be given in which the blower mechanism 99 is stopped only for the stop time T2 after the required arrival time T1 that has been set in advance in consideration of the allowance time α (margin) has elapsed in the required time T0.

As a time measurement method, for example, a rotary encoder is attached to the rotating shaft of the conveying means, and time measurement can be performed based on a pulse output from the rotary encoder. The pulse generated from the rotary encoder can be used as an address or can be used as position information of the printed circuit board 1 by counting the number of pulses.

Here, the required time T0 is that the printed circuit board 1 is subjected to a soldering process from the time t0 (hereinafter also referred to as the charging time t0) when the printed circuit board 1 is loaded into the jet soldering apparatus 100, and then the air curtain area 927. It is the elapsed time to reach.

Further, the arrival required time T1 is a time considering the margin α from the required time T0. That is, T1 = T0−α. The passage time T3 means the time for the printed circuit board 1 to pass through the air curtain area 927. The passage time T3 is the length x (x = about 350 mm) in the conveyance direction of the printed circuit board 1 and the substrate in the air curtain area 927. This time is determined from the length Lc in the transport direction (Lc = about 400 mm) and the transport speed V (V = about 0.2 to 0.5 m / min).

The stop time T2 is a time for stopping the motor 96 of the blower mechanism 99, and the margin β is also taken into account after the above-described passage time T3. A time considering the margins α and β is set as the stop time T2. That is, T2 = T3 + α + β.

Of course, it is assumed that the printed circuit board 1 is transported by the transport unit 10 at a predetermined transport speed V and the printed circuit board 1 is soldered. In this example, it is assumed that the printed circuit board 1 is put into the jet soldering apparatus 100 at time t0 shown in FIG.

Under these control conditions, when the insertion of the printed circuit board 1 is detected to the jet soldering apparatus 100 at time t0 shown in FIG. 7A, PCB detection data D18 shown in FIG. Generated. The PCB detection data D18 is output from the substrate detection sensor 18 to the control unit 65. In the control unit 65, the counter 65a (may be a timer) shown in FIG. 5 is started in synchronization with the rising edge of the PCB detection data D18. The counter 65a generates the CLK signal shown in FIG. 7B, and outputs the count value at time t14 when the arrival required time T1 is reached. Further, after the elapse of the stop time T2 of the blower mechanism 99, the time t18 To output the count value.

These count values are output from the control unit 65 to the air curtain drive unit 95 as curtain control data D95. The air curtain drive unit 95 controls the motor control signal S96 shown in FIG. 7D from on (high level) to off (low level) using the count value output at time t14 as a trigger. The motor 96 stops when the motor control signal S96 falls from the high level to the low level.

Further, the air curtain drive unit 95 controls the motor control signal S96 shown in the figure from off (low level) to on (high level) using the count value output at time t18 as a trigger. The motor 96 resumes rotation when the motor control signal S96 rises from a low level to a high level. Thereby, the air curtain area 927 by the blower mechanism 99 is re-formed.

T3 shown in FIG. 7E is the time for the printed circuit board 1 (PCB # 1) to pass through the air curtain area 927. The passage time T3 is a time required for the front end portion of the printed circuit board 1 to enter the air curtain area 927 and the rear end portion to pass through the air curtain area 927. In this example, the stop time T2 is set longer than the passage time T3. For example, in order to prevent turbulent flow before and after the passage time T3, margin times α and β (margin) are added to set T2 = T3 + α + β. For example, “1 second” is set as the margin time α. Of course, the margin time α is not limited to “1 second”, and may be “2 seconds”, “3 seconds”, etc. Even if the margins of α and β are set to different values, Moreover, you may set to the same value.

Thus, when the stop time T2 is set with respect to the passage time T3, the motor 96 can be stopped one second before the front end of the printed circuit board 1 enters the air curtain area 927. In addition, the motor 96 can be driven after one second has elapsed after the rear end of the printed circuit board 1 has passed through the air curtain area 927.

As described above, according to the jet soldering apparatus 100 as the first embodiment, the printed circuit board 1 to which the electronic component is attached is preheated, the preheated printed circuit board 1 is conveyed to the soldering processing unit, and the printing is performed. When the electronic component is soldered to the board 1, the control unit 65 controls the blower mechanism 99 so as to send or stop the air corresponding to the passage timing of the printed board 1 that passes through the air curtain area 927. Become.

The control unit 65 stops the air blowing just before the printed circuit board 1 passes through the air curtain area 927, stops the air blowing while the printed circuit board 1 passes, and immediately after the printed circuit board 1 passes through the air curtain area 927. Blowing can be resumed. Therefore, the control unit 65 can prevent the occurrence of turbulence in preference to the function of blocking the atmosphere on the transport path by the blower mechanism 99. The printed circuit board 1 can pass through the air curtain area 927 without generating turbulent flow. Thereby, the jet soldering apparatus 100 with the air curtain area 927 having a turbulent flow generation preventing function can be provided.

The timing of stopping the blowing of the blowing mechanism 99 and the timing of re-forming the air curtain area 927 after stopping the blowing are stopped before the printed circuit board 1 passes through the air curtain area 927. After completely passing through the air blowing mechanism 99, it is preferable to restart the air blowing to re-form the air curtain area 927. These timings can be appropriately determined in consideration of production efficiency. That is, the values of the margins α and β include positive and zero values.

In addition, the case where the upper guide plate 906 is configured by one member has been described, but the present invention is not limited thereto, and the left side portion 906a of the upper guide plate 906 is configured by one component, and the right side portion 906b is configured by one component. The upper guide plate 906 may be divided into two members in total. The same applies to the lower guide plate 905.

<When the substrate is continuously loaded in the first embodiment>
Subsequently, a control example of the blower 904 as the second embodiment will be described with reference to FIGS. In this example, as in the first embodiment, the air blower mechanism 99 operates when the power is turned on to always form the air curtain area 927. Unlike the first embodiment, the length x This is a case where a plurality of known printed circuit boards 1 of the same type are continuously fed into the jet soldering apparatus 100. In this case, the time required for reaching T1 preset for each printed circuit board 1 has elapsed with reference to the time when the first printed circuit board 1 is put into the jet soldering apparatus 100 (corresponding to the leading edge detection time). Subsequently, an example in which the operation of stopping the air blowing mechanism 99 is repeated for the stop time T2 will be described.

Here, the required time T1 is the elapsed time from the time when each printed circuit board 1 is put into the jet soldering apparatus 100 to the time when the printed circuit board 1 is subjected to the soldering process, and then to the air curtain area 927. That is, the margin α is taken into consideration in the same manner as in the first embodiment from the required travel time T1. The stop time T2 is a time during which the motor 96 of the blower mechanism 99 is stopped in consideration of the margins α and β as in the first embodiment.

Of course, it is assumed that the plurality of printed circuit boards 1 are sequentially transported by the transport unit 10 at a constant transport speed V, and the printed circuit boards 1 are continuously soldered. In this example, it is assumed that the first printed circuit board 1 is put into the jet soldering apparatus 100 at time t0 shown in FIG.

Using these as control conditions, the insertion of the first printed circuit board 1 (denoted as PCB # 1 in the figure) into the jet soldering apparatus 100 is detected at time t0 shown in FIG. Then, the PCB detection data D18 shown in FIG. 8C is generated. The PCB detection data D18 is output from the substrate detection sensor 18 to the control unit 65. In the control unit 65, the counter 65a (may be a timer) shown in FIG. 5 is started in synchronization with the rising edge of the PCB detection data D18. The counter 65a generates the CLK signal shown in FIG. 8B with reference to the time t0. When the arrival required time T1 is reached, for example, the counter 65a outputs a count value at the time t160, and further stops the blower mechanism 99. When time T2 is reached, the count value is output at time t180.

Further, when the insertion of the second printed circuit board 1 (denoted as PCB # 2 in the figure) is detected at time t40 shown in FIG. 8A, PCB # shown in FIG. PCB detection data D18 indicating that the input of 2 has been detected is generated. Similarly, when the insertion of the third printed circuit board 1 (denoted as PCB # 3 in the figure) is detected at time t80, it is detected that the insertion of PCB # 3 shown in FIG. PCB detection data D18 indicating is generated. When the insertion of the fourth printed circuit board 1 (described as PCB # 4 in the figure) is detected at time t120, the PCB detection indicating that the insertion of PCB # 4 shown in FIG. 8C is detected. Data D18 is generated. Hereinafter, PCB # 5 to PCB # 8 are detected.

These count values are output from the control unit 65 to the air curtain drive unit 95 as curtain control data D95. The air curtain drive unit 95 controls the motor control signal S96 shown in FIG. 8D from on (high level) to off (low level) using the count value output at time t160 as a trigger. The motor 96 stops when the motor control signal S96 falls from the high level to the low level. The printed circuit board 1 (PCB # 1) shown in FIG. 8E passes through the air curtain non-formation region with a passage time T3 during the period when the blower mechanism 99 is stopped.

Further, the air curtain driving unit 95 controls the motor control signal S96 shown in the figure from off (low level) to on (high level) using the count value output at time t180 as a trigger. The motor 96 resumes rotation when the motor control signal S96 rises from a low level to a high level. Thereby, the air curtain area 927 by the blower mechanism 99 is re-formed.

Further, for the printed board 1 (PCB # 2) that is continuously conveyed, the air curtain driving unit 95 uses the count value output at time t200 as a trigger to perform motor control shown in FIG. The signal S96 is controlled from on (high level) to off (low level). The motor 96 stops when the motor control signal S96 falls from the high level to the low level. The printed circuit board 1 (PCB # 2) shown in FIG. 8F passes through the air curtain non-formation region with a passage time T3 during the period when the blower mechanism 99 is stopped.

Further, the air curtain drive unit 95 controls the motor control signal S96 shown in the figure from off (low level) to on (high level) using the count value output at time t220 as a trigger. The motor 96 resumes rotation when the motor control signal S96 rises from a low level to a high level. Thereby, the air curtain area 927 by the blower mechanism 99 is re-formed.

For the printed circuit board 1 (PCB # 3) that is continuously conveyed, the air curtain driving unit 95 uses the count value output at time t240 as a trigger to perform motor control shown in FIG. The signal S96 is controlled from on (high level) to off (low level). The motor 96 stops when the motor control signal S96 falls from the high level to the low level. The printed circuit board 1 (PCB # 3) shown in FIG. 8G passes through the air curtain non-formation region with a passage time T3 during the period when the blower mechanism 99 is stopped.

Further, the air curtain drive unit 95 controls the motor control signal S96 shown in the figure from off (low level) to on (high level) using the count value output at time t260 as a trigger. The motor 96 resumes rotation when the motor control signal S96 rises from a low level to a high level. Thereby, the air curtain area 927 by the blower mechanism 99 is re-formed.

Further, for the printed board 1 (PCB # 4) that is continuously conveyed, the air curtain driving unit 95 uses the count value output at time t280 as a trigger to perform motor control shown in FIG. The signal S96 is controlled from on (high level) to off (low level). The motor 96 stops when the motor control signal S96 falls from the high level to the low level. The printed circuit board 1 (PCB # 4) shown in FIG. 8H passes through the air curtain non-formation region with a passage time T3 during the period when the blower mechanism 99 is stopped.

Further, the air curtain driving unit 95 controls the motor control signal S96 shown in the figure from off (low level) to on (high level) using the count value output at time t300 as a trigger. The motor 96 resumes rotation when the motor control signal S96 rises from a low level to a high level. Thereby, the air curtain area 927 by the blower mechanism 99 is re-formed.

Each of the passage times T3 shown in (E) to (H) of FIG. 8 is the same as in the first embodiment, the leading end of the printed circuit board 1 enters the air curtain area 927, and the trailing end is air. This is the time required to pass through the curtain area 927. Also in this example, the stop time T2 is set longer than the passage time T3 in the same manner as in the first embodiment. Before and after the passage time T3, extra time α and β (margin) are added to prevent turbulent flow, and T2 = T3 + α + β is set. As the margin times α and β, for example, “1 second” is set in the same manner as in the first embodiment. Of course, the margin time α is not limited to “1 second”, and may be “2 seconds”, “3 seconds”, etc. Even if the margins of α and β are set to different values, Moreover, you may set to the same value.

As described above, according to the control example of the blower 904 according to the second embodiment, when the printed circuit board 1 having a plurality of predetermined lengths is continuously inserted into the jet soldering apparatus 100, the first print is performed. The operation in which the blower mechanism 99 stops only for the stop time T2 after the required time T1 preset for each printed circuit board 1 has elapsed with respect to the time t0 when the board 1 is put into the jet soldering apparatus 100. Will be repeated.

The control unit 65 can stop the air blowing immediately before the printed board 1 that is continuously conveyed passes through the air curtain area 927 and can stop the air blowing while the printed board 1 is passing. Immediately after the printed circuit board 1 passes through the air curtain area 927, the control unit 65 can resume air blowing, so that the generation of turbulence is prevented in preference to the function of blocking the atmosphere on the conveyance path by the air curtain area 927. become able to. Thereby, the printed circuit board 1 conveyed continuously can pass through the air curtain area 927 without generating turbulent flow.

Furthermore, when both the values of the margins α and β are set to “1 second”, the stop time T2 is set longer than the passage time T3 in the same manner as in the first embodiment. With this setting, the motor 96 can be stopped one second before the tip of the printed circuit board 1 that is continuously input enters the air curtain area 927. In addition, the motor 96 can be driven after one second has elapsed after the rear end of the printed circuit board 1 has passed through the air curtain area 927. Thereby, the jet soldering apparatus 100 with the air curtain area 927 having a turbulent flow generation preventing function can be provided.

The timing of stopping the blowing of the blowing mechanism 99 and the timing of re-forming the air curtain after stopping the blowing are stopped before the printed circuit board 1 passes through the air curtain area 927 and the printed circuit board 1 is turned into the air curtain. After completely passing through the area 927, it is preferable to re-form the air curtain area 927 by restarting air blowing. These timings can be appropriately determined in consideration of production efficiency. That is, the values of margins α and β include zero values in addition to positive values.

<When automatically detecting the board length: no margin>
Subsequently, a control example of the blower mechanism 99 as the third embodiment will be described with reference to FIGS. 9A, 9B, and 10. In this example, the case where the margins α and β are not set for the stop time T2 will be described. The control unit 65 illustrated in FIG. 9A includes a timer 65b, a comparison calculation unit 65c, and a memory unit 65d. A timer 65b and a memory unit 65d are connected to the timer 65b and the comparison calculation unit 65c. The timer 65b sequentially generates time data D (i) indicating the current time.

The memory unit 65d has substrate loading information (hereinafter referred to as substrate loading data D (t)), distance information (hereinafter referred to as distance data D (L)), and substrate arrival information (hereinafter referred to as substrate arrival data D (T)). ), Substrate missing information (hereinafter referred to as substrate missing data D (S)), substrate length information (hereinafter referred to as substrate length data D (x)), and conveyance speed information (hereinafter referred to as conveyance speed data D (V)). ) Is stored. The board loading data D (t) is included in the PCB detection data D18 output from the board detection sensor 18. The board loading data D (t) includes, for example, a time ta when the leading edge of the printed board 1 conveyed at a constant conveyance speed V is detected and a time tb when the trailing edge of the printed board 1 is detected.

The distance data D (L) is information indicating the distance L (actual measurement) from the substrate carry-in entrance 202 to the leading portion of the air curtain area 927. The distance L is, for example, the distance from the optical axis of the substrate detection sensor 18 shown in FIG. 1 to one wall surface of the exhaust duct 907 of the blower mechanism 99. The board arrival data D (T) is information indicating the elapsed time from the time (corresponding to ta) when the printed board 1 is introduced into the board carry-in entrance 202 (transport path) until it reaches the air curtain area 927. The substrate arrival data D (T) corresponds to the required time T0 in the first embodiment ((D) in FIG. 7). In this example, since the margin α is not provided, the substrate arrival data D (T) also corresponds to the required arrival time T1.

The board missing data D (S) is information indicating the time when the printed board 1 passes through the rear end portion of the air curtain area 927. The board length data D (x) is information indicating the length x of the printed board 1 in the transport direction. The conveyance speed data D (V) is information indicating the conveyance speed V at which the printed circuit board 1 is conveyed.

In order to output the curtain control data D95 to the air curtain drive unit 95, for example, the comparison calculation unit 65c compares the time data D (i) output from the timer 65b with the substrate arrival data D (T), It is detected whether or not. These constitute the inside of the control unit 65.

FIG. 9B shows a configuration example in which the two motors 96 a and 96 b are controlled by the air curtain driving unit 95. The air curtain driving unit 95 shown in FIG. 9B is connected to blower motors 96a and 96b that constitute an example of the driving unit. The motor 96a rotates the fan unit 919 shown in FIGS. 1 to 4 based on the motor control signal S9a. The motor 96b rotates the fan unit 919 shown in the figure based on the motor control signal S9b. Thereby, as will be described later, the two air blowing mechanisms 99a and 99b can be controlled in a time-sharing manner by the air curtain driving unit 95 (see FIG. 14).

Subsequently, a control example of the blower mechanism 99 according to the third embodiment will be described with reference to FIG. In this example, the printed circuit board 1 (denoted as PCB in the figure) is put into the jet soldering apparatus 100 one by one and soldered, and the blower mechanism 99 is driven in an idling state. The unit 65 performs software processing on the board loading data D (t) and the distance data D (L), and the board length data D (x), board arrival data D (T), and board missing data D (S) in real time. This information is calculated when the air curtain driving unit 95 sets these pieces of information. Here, the idling state refers to a state in which the printed circuit board 1 is not put into the jet soldering apparatus 100 and the soldering process is not performed.

With these as control conditions, the control unit 65 accepts the setting of operation conditions in step ST1 shown in FIG. At this time, as a driving condition, the user operates the input unit 64 shown in FIG. 5 to set the single wafer processing mode. Here, the single wafer processing mode refers to a mode in which the printed circuit boards 1 are put into the jet soldering apparatus 100 one by one and soldered. In addition, the user sets the number of printed circuit boards 1 to be soldered in the control unit 65.

When the user sets the operating condition, the user puts the printed circuit board 1 into the board carry-in port 202 on the carrying path provided with the air curtain area 927. Then, in step ST2, the substrate detection sensor 18 shown in FIG. 5 detects the insertion of the printed circuit board 1 (denoted as PCB in the drawing) and outputs the substrate insertion data D (t) to the control unit 65.

In step ST3, the control unit 65 starts the timer 65b shown in FIG. 9A based on the substrate loading data D (t). The timer 65b sequentially outputs time data D (i) indicating the current time as a control reference to the control unit 65.

In step ST4, the control unit 65 measures the board length of the printed board 1. At this time, the control unit 65 determines the substrate length from the difference between the leading edge detection time ta and the trailing edge detection time tb of the printed circuit board 1 transported at the transport speed V and the transport speed data D (V) of the transport unit 10. Data D (x) is calculated. Assuming that the conveyance speed of the printed circuit board 1 conveyed by the conveyance unit 10 is V and the length of the printed circuit board 1 is x, the control unit 65 calculates x = (tb−ta) · V. Data D (x) is obtained.

In step ST5, the control unit 65 calculates the approach time ti from the board arrival data D (T) of the printed circuit board 1 and the removal time tj from the board removal data D (S). The substrate arrival data D (T) is calculated from the distance data D (L) and the conveyance speed data D (V). When the substrate arrival time of the printed circuit board 1 from the substrate carry-in port 202 to the air curtain area 927 is T, and the distance from the substrate carry-in port 202 to the air curtain area 927 is L, the control unit 65 calculates T = L / V. Thus, substrate arrival data D (T) is obtained. The approach time ti is time data D (i) output from the timer 65b at the substrate arrival time T and corresponds to, for example, the time t16 in the first embodiment.

Substrate missing data D (S) is calculated from substrate length data D (x) and transport speed data D (V). Assuming that the length Lc of the air curtain area 927 in the substrate conveyance direction is S and the passage time of the printed circuit board 1 that exits from the air curtain area 927 is S, the control unit 65 calculates S = (x + Lc) / V, Missing data D (S) is obtained. The missing time tj is time data D (i) output from the timer 65b at the passage time S, and corresponds to, for example, the time t18 in the first embodiment.

In step ST6, the control unit 65 determines whether or not the printed circuit board 1 has approached. The judgment criterion at that time is performed by comparing the time data D (i) output from the timer 65b with the substrate arrival data D (T) and detecting whether or not they match (information comparison detection). processing). If the printed circuit board 1 is not approaching, the information comparison detection process is continued.

When the printed circuit board 1 approaches, the time data D (i) and the board arrival data D (T) coincide with each other, and the approach time ti is determined. In step ST6, the control unit 65 stops the operation of the blower mechanism 99. To do. At this time, the control unit 65 outputs curtain control data D95 based on the substrate arrival data D (T) to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S96 for turning off the motor 96. The fan unit 919 stops when the motor 96 is turned off. Thereby, operation | movement of the ventilation mechanism 99 can be stopped based on the board | substrate arrival data D (T).

Thereafter, in step ST7, the control unit 65 determines whether the printed circuit board 1 has passed through the air curtain area 927. The judgment criterion at that time is performed by comparing the time data D (i) output from the timer 65b with the board missing data D (S) and detecting whether or not they match (information comparison detection). processing). If the printed circuit board 1 does not pass through the air curtain area 927, the information comparison detection process is continued.

When the printed circuit board 1 passes through the air curtain area 927, the time data D (i) and the board removal data D (S) coincide with each other and the removal time tj is determined, so that the blower mechanism 99 is driven in step ST8. Control to resume. At this time, the control unit 65 outputs curtain control data D95 based on the substrate removal data D (S) to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S96 for turning on the motor 96. When the motor 96 is turned on, the fan unit 919 rotates. Thereby, the air blowing mechanism 99 can be operated based on the board missing data D (S).

In step ST9, the control unit 65 determines whether or not the soldering process for all the printed circuit boards 1 has been completed. The discrimination criterion at that time is, for example, detecting whether or not the number of printed circuit boards 1 set in step ST1 has been counted up. When the count-up signal is not detected, it is determined that the soldering process for all the printed circuit boards 1 has not been completed, and the process returns to step ST2 to repeat the above-described steps ST2 to ST8. When the count-up signal is detected, it is determined that the soldering process for all the printed circuit boards 1 has been completed, and the control of the blower mechanism 99 is ended.

Thus, according to the jet soldering apparatus 100 as a 3rd Example, the printed circuit board 1 which attached the electronic component was thrown into the jet soldering apparatus 100 one by one, and it pre-heated and after pre-heating. When the printed circuit board 1 is transported to the soldering processing unit and the electronic component is soldered to the printed circuit board 1, the control unit 65 that drives the blower mechanism 99 in the idling state includes the substrate input data D (t) and the distance data. D (L) is processed by software to calculate the board length data D (x), board arrival data D (T), and board missing data D (S) in real time. I set it.

Even if the lengths of the printed circuit boards 1 are different from each other, the control unit 65 performs the printing based on the board length data D (x), the board arrival data D (T), and the board missing data D (S). Air blowing can be stopped immediately before the substrate 1 passes through the air curtain area 927. At the same time, the control unit 65 stops the blowing while the printed circuit board 1 is passing, and the blowing can be resumed immediately after the printed circuit board 1 passes through the air curtain area 927.

Therefore, even when the lengths of the printed circuit boards 1 are different from each other, the generation of turbulent flow can be prevented in preference to the function of blocking the atmosphere on the conveyance path by the air blowing mechanism 99 that forms the air curtain area 927. become. The printed circuit boards 1 having different lengths can pass through the air curtain area 927 without generating turbulent flow. Thereby, the jet soldering apparatus 100 with the air curtain area 927 having a turbulent flow generation preventing function can be provided.

In this example, the case where the margins α and β are not set has been described. However, the air curtain driving unit 95 may be controlled by setting the margins α and β as in the first embodiment. In this embodiment, the length of the printed board 1 in the transport direction is automatically detected. Therefore, it is preferably applicable when the length of the printed circuit board 1 in the transport direction is unknown, but can also be applied when the length of the printed circuit board 1 in the transport direction has a predetermined length.

<When a plurality of substrates are continuously input to the third embodiment: information recording and control example>
In this embodiment, as in the case of the control example of the first embodiment applied to the second embodiment, the control example when soldering the plurality of printed circuit boards 1 of the third embodiment is similarly applied to the fourth embodiment. I was able to do it. In that case, information recording corresponding to a plurality of printed circuit boards 1 is performed as shown in FIG. 11, and the blower mechanism 99 may be controlled in parallel based on the substrate insertion data D (t) obtained by the information recording. .

Subsequently, an example of information recording corresponding to a plurality of printed circuit boards 1 as a fourth embodiment will be described with reference to FIG. In this example, a plurality of printed circuit boards 1 are successively soldered.

Assuming a case where each printed circuit board 1 is regularly and periodically loaded into the jet soldering apparatus 100, the board detection sensor 18 shown in FIG. 9A periodically detects the continuously loaded printed circuit boards 1. become. The board detection sensor 18 outputs board insertion data D (t) to the control unit 65 every time the printed board 1 is detected.

The controller 65 periodically inputs the board loading data D (t), and performs software processing on the board loading data D (t) and the distance data D (L) for each printed board 1 that is continuously loaded. . Then, the control unit 65 calculates the board length data D (x), the board arrival data D (T), and the board missing data D (S) in real time, and sets these information in the air curtain driving unit 95. Are stored in the memory unit 65d.

In this example, an information recording area as shown in FIG. 11 is allocated to the memory unit 65d shown in FIG. 9A. In this information recording area, a turn-on time tx, an approach time ti, and a drop-off time tj are described together with a number (for example, NO. PCB # 1) for identifying the printed circuit board 1. For example, the NO. The input time t0, the approach time t160, and the withdrawal time t180 are described for PCB # 1. NO. For identifying the second printed circuit board 1 The input time t40, the approach time t200, and the withdrawal time t220 are described for PCB # 2.

．No. To identify the third printed circuit board 1 The input time t80, the approach time t240, and the exit time t260 are described for PCB # 3. NO. For identifying the fourth printed circuit board 1. The input time t120, the approach time t280, and the exit time t300 are described for PCB # 4. NO. For identifying the fifth printed circuit board 1 An input time t160, an approach time t320, and an exit time t340 are described for PCB # 5. Hereinafter, similarly, the insertion time tx, the approach time ti, and the removal time tj related to the set number of printed circuit boards 1 are respectively described. The control unit 65 controls the air curtain driving unit 95 with reference to the description content of the memory unit 65d.

Subsequently, a control example of the blower mechanism 99 when a plurality of PCBs are inserted will be described with reference to FIG. In this example, the board loading data D (t) is periodically stored, and the board loading data D (t) and the distance data D (L) are processed for each printed board 1 by software processing. Substrate length data D (x), substrate arrival data D (T), and substrate missing data D (S) are calculated in real time, and these pieces of information are stored in the memory unit 65d for setting in the air curtain drive unit 95. Assumes the case. The control unit 65 refers to the information recording contents of the memory unit 65d and controls the air curtain driving unit 95 in parallel with the information recording.

Using these as control conditions, the control unit 65 accepts the setting of operation conditions in step ST11. At this time, the user operates the input unit 64 shown in FIG. 5 as an operation condition to set the continuous processing mode. Here, the continuous processing mode refers to a mode in which the printed circuit board 1 is periodically and continuously put into the jet soldering apparatus 100 and soldered. Also in this example, the user sets the number of printed circuit boards 1 to be soldered in the control unit 65.

When the user sets the operating conditions, the first printed circuit board 1 is put into the board carry-in port 202 of the carrying path provided with the air blowing mechanism 99 that forms the air curtain area 927. Then, on the other hand, in step ST12, the board detection sensor 18 shown in FIG. 9A detects the insertion of the i-th (i = 1 to n) printed circuit board 1 (denoted as PCB in the figure) to detect board insertion data. D (t) is output to the control unit 65.

In step ST13, the control unit 65 stores the board loading data D (t) of the first printed board 1 in the memory unit 65d and starts the timer 65b shown in FIG. 9A. The timer 65b sequentially outputs time data D (i) indicating the current time as a control reference to the control unit 65. The substrate loading data D (t) indicating the loading time tx at that time corresponds to, for example, the time t0 in the third embodiment.

In step ST14, the control unit 65 measures the substrate length of the first printed circuit board 1. At this time, the controller 65 determines the difference between the leading edge detection time ta and the trailing edge detection time tb of the first printed circuit board 1 that is transported at the transport speed V, and the transport speed data D (V ) To calculate the substrate length data D (x). Assuming that the conveyance speed of the printed circuit board 1 conveyed by the conveyance unit 10 is V and the length of the printed circuit board 1 is x, the control unit 65 calculates x = (tb−ta) · V. Data D (x) is obtained.

In step ST15, the control unit 65 calculates the approach time ti from the board arrival data D (T) of the first printed circuit board 1 and the removal time tj from the board removal data D (S). The substrate arrival data D (T) is calculated from the distance data D (L) and the conveyance speed data D (V). When the substrate arrival time of the printed circuit board 1 from the substrate carry-in port 202 to the blower mechanism 99 is T, and the distance from the substrate carry-in port 202 to the blower mechanism 99 is L (see FIG. 1), the control unit 65 has T = L. By calculating / V, substrate arrival data D (T) of the first printed circuit board 1 is obtained. The approach time ti is time data D (i) output from the timer 65b at the substrate arrival time T, and corresponds to, for example, the time t160 in the third embodiment.

Substrate missing data D (S) is calculated from substrate length data D (x) and transport speed data D (V). Assuming that the length Lc of the air curtain area 927 in the board conveyance direction is S and the passage time of the first printed circuit board 1 exiting from the air curtain area 927 is S, the control unit 65 calculates S = (x + Lc) / V. Thus, the board missing data D (S) of the first printed board 1 is obtained. The missing time tj is time data D (i) output from the timer 65b at the passage time S and corresponds to, for example, the time t180 in the third embodiment.

In step ST16, the control unit 65 stores the insertion time tx, the approach time ti, and the removal time tj of the printed circuit board 1 in the memory unit 65d (time information recording). For example, the NO. The input time t0, the approach time t160, and the withdrawal time t180 are described for PCB # 1 (see FIG. 11).

In parallel with the storage process of the substrate loading data D (t) and the like in the memory unit 65d, in step ST17, the control unit 65 reads the substrate loading data D (t) and the like from the memory unit 65d and executes the process. To do. In step ST18, the control unit 65 determines whether or not the first printed circuit board 1 has approached. The judgment criterion at that time is to compare whether the time data D (i) output from the timer 65b and the board arrival data D (T) of the first printed circuit board 1 match each other. (Information comparison detection process). If the printed circuit board 1 is not approaching, the information comparison detection process is continued.

When the first printed circuit board 1 approaches, the time data D (i) and the board arrival data D (T) coincide with each other, and the approach time ti is determined. Stop the operation. At this time, the control unit 65 outputs curtain control data D95 based on the board arrival data D (T) of the first printed circuit board 1 to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S96 for turning off the motor 96. The fan unit 919 stops when the motor 96 is turned off. Thereby, the operation of the blower mechanism 99 can be stopped based on the board arrival data D (T) of the first printed board 1.

Thereafter, in step ST20, the control unit 65 determines whether the printed circuit board 1 has passed through the air curtain area 927. The judgment criterion at that time is to compare the time data D (i) output from the timer 65b with the board missing data D (S) of the first printed circuit board 1, and detect whether or not they match. (Information comparison detection process). If the printed circuit board 1 does not pass through the air curtain area 927, the information comparison detection process is continued.

When the first printed circuit board 1 passes through the air curtain area 927, the time data D (i) and the board removal data D (S) coincide with each other, and the removal time tj is determined. 99 is controlled to resume. At this time, the control unit 65 outputs curtain control data D95 based on the board removal data D (S) of the first printed circuit board 1 to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S96 for turning on the motor 96. When the motor 96 is turned on, the fan unit 919 rotates. Thereby, the air blowing mechanism 99 can be operated based on the board missing data D (S) of the first printed board 1.

In step ST22, the control unit 65 determines whether or not the soldering process for all the printed circuit boards 1 has been completed. The discrimination criterion at that time is, for example, detecting whether or not the number of printed circuit boards 1 set in step ST11 is counted up. If the count-up signal is not detected, it is determined that the soldering process for all the printed circuit boards 1 has not been completed, and the control unit 65 returns to step ST12 and determines whether the second (th) and subsequent PCBs have been detected. Determine. In this case, the determination criterion is that the substrate detection data 18 (denoted as PCB in the drawing) of the second printed circuit board 1 shown in FIG. 9A is output to the control unit 65 from the substrate detection sensor 18. Is done by detecting it. Since the subsequent processing is as described above, the description thereof is omitted.

Thus, according to the jet soldering apparatus 100 as the fourth embodiment, the control unit 65 periodically inputs the board loading data D (t) of the printed board 1 that is continuously loaded, The board input data D (t) and the distance data D (L) are processed by software for each printed circuit board 1. Then, the control unit 65 calculates the board length data D (x), the board arrival data D (T), and the board missing data D (S) in real time, and sets these information in the air curtain driving unit 95. Store in the memory unit 65d. The control unit 65 refers to the information recording contents of the memory unit 65d and controls the air curtain driving unit 95 in parallel with the information recording.

The control unit 65 converts the board length data D (x), the board arrival data D (T), and the board missing data D (S) even when the lengths of the printed boards 1 that are continuously input are different. Based on this, the blowing can be stopped immediately before the printed circuit board 1 passes through the air curtain area 927. At the same time, the control unit 65 stops air blowing even while the printed circuit board 1 is passing, and can resume air blowing immediately after the printed circuit board 1 passes through the air curtain area 927.

Therefore, even when the lengths of the printed circuit boards 1 that are continuously input are different from each other, the generation of turbulence takes precedence over the function of blocking the atmosphere on the conveyance path by the air blowing mechanism 99 that forms the air curtain area 927. Can be prevented. The printed circuit boards 1 having different lengths can pass through the air curtain area 927 without generating turbulent flow. Thereby, the jet soldering apparatus 100 with the air curtain area 927 having a turbulent flow generation preventing function can be provided.

<Example suitable for a reflow apparatus having a plurality of air curtain areas>
Next, a configuration example of the reflow apparatus 200 as the fifth embodiment will be described with reference to FIG. In this example, the airflow mechanisms 99a and 99b for forming a plurality (two in this example) of air curtain areas 927a and 927b are arranged in the reflow apparatus 200.

The reflow apparatus 200 shown in FIG. 13 constitutes another example of a soldering apparatus, and includes an apparatus main body 211 and a conveyor 52. The apparatus main body 211 is formed of a tunnel-shaped housing having a carry-in port 10a and a carry-out port 10b. The conveyor 52 extends along the conveyance path X from the carry-in port 10a to the carry-out port 10b, and the printed circuit board 3 is moved from the carry-in port 10a of the apparatus main body 211 toward the carry-out port 10b at a predetermined speed. Transport. A substrate detection sensor 18 as described in the first embodiment is disposed at the carry-in entrance 10a. The printed circuit board 3 set on the conveyor 52 is detected at the carry-in entrance 10a to generate PCB detection data D18. The PCB detection data D18 is output to the control unit 65 shown in FIG.

Inside the apparatus main body 211, a preheating zone Z1, a heating zone Z2, and a cooling zone Z3 are provided in order along the transport path X. The preheating zone Z1 is an area for volatilizing a solvent contained in the cream solder, and a heater 42, a fan 44, a motor 46, and the like are installed. As the cream solder, for example, lead-free solder containing tin-silver-copper, tin-zinc-bismuth or the like is used. The melting point of this solder is, for example, about 180 ° C. to 220 ° C. The heating zone Z2 is an area for melting the solder by heating the printed circuit board 3, and a heater 42, a fan 44, a motor 46, and the like are installed.

Note that, in the preheating zone Z1 and the heating zone Z2, the configurations of the heater 42, the fan 44, and the motor 46 are generally different by using only the temperature setting using the same configuration, but different configurations. It is also good. Even when different configurations are adopted, the basic configuration and functions are the same, and thus the description thereof is omitted for the sake of convenience.

The heater 42 is disposed so as to face the upper and lower sides of the conveyor 52, and heats the air inside the preheating zone Z1 and the heating zone Z2. In this example, as shown in FIG. 12, in the preheating zone Z1, three heaters 42 are arranged above and below, and in the heating zone Z2, two heaters 42 are arranged above and below, respectively.

The motor 46 is arranged so as to face the upper and lower sides of the conveyor 52, and rotates the fans 44 arranged in each zone. In this example, as shown in FIG. 12, in the preheating zone Z1, three motors 46 are arranged above and below, and in the heating zone Z2, two motors 46 are arranged above and below, respectively.

The fan 44 is composed of, for example, a turbo fan or a sirocco fan, and is electrically connected to the motor 46. The fan 44 is driven to rotate by driving of the motor 46, and the hot air heated by the heater 42 is circulated inside the preheating zone Z1 and the heating zone Z2 and blown to the upper surface and the lower surface of the printed circuit board 3, respectively. In this example, three fans 44 are arranged on the upper and lower sides in the preheating zone Z1, and two fans 44 are arranged on the upper and lower sides in the heating zone Z2.

In this example, the first air blowing mechanism 99a and the air curtain area 927a are disposed between the heating zone Z2 and the cooling zone Z3. The second air blowing mechanism 99b and the air curtain area 927b are disposed at the carry-out port 10b of the apparatus main body 211. The blower 904 described in the first embodiment is used for the blower mechanisms 99a and 99b. An inert gas such as air or nitrogen (N2) or a mixed gas thereof is introduced into the blowing mechanisms 99a and 99b. The air blowing mechanisms 99a and 99b are controlled by the control unit 65 described in the second embodiment.

Subsequently, a control example of the blower mechanisms 99a and 99b will be described with reference to FIGS. 9A, 9B, and 14. FIG. In this example, the processing contents of steps ST6 to ST8 shown in FIG. 10 and the portions corresponding to the processing contents of steps ST17 to ST21 shown in FIG. 12 are the processing contents of steps ST71 to ST78 shown in FIG. Is replaced by Accordingly, the processing contents of steps ST71 to ST78 shown in FIG. 14 will be described. The other processing contents are the same as those shown in FIGS. 9A, 9B, and 12, and will not be described.

That is, in step ST71 shown in FIG. 14, the control unit 65 determines whether or not the printed circuit board 1 (described as PCB in the drawing) has approached the first air curtain area 927a. In this case, the criterion is that the time data D (i) output from the timer 65b shown in FIG. 9A is compared with the board arrival data D (Ta) of the printed circuit board 1, and whether or not they match. It is performed by detecting (information comparison detection process). If the printed circuit board 1 is not approaching, the information comparison detection process is continued.

The substrate arrival data D (Ta) is calculated from the distance data D (La) and the conveyance speed data D (V). The board arrival data D (Ta) is information indicating the elapsed time from the time (corresponding to ta) when the printed board 1 is introduced into the carry-in entrance 10a until it reaches the first air curtain area 927a. The substrate arrival data D (Ta) corresponds to the required time to reach the air curtain area 927a. The distance data D (La) is information indicating a distance La (actual measurement) from the carry-in entrance 10a to the air curtain area 927a.

When the printed circuit board 1 approaches the air curtain area 927a, the time data D (i) and the board arrival data D (Ta) coincide with each other to determine the approach time ti. The operation of the air blowing mechanism 99a is stopped. At this time, the control unit 65 shown in FIG. 9A outputs curtain control data D95 based on the board arrival data D (Ta) of the printed circuit board 1 to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S9a for turning off the motor 96a shown in FIG. 9B. The fan unit 919 stops when the motor 96a is turned off. Thereby, the operation of the blower mechanism 99a can be stopped based on the board arrival data D (Ta) of the printed board 1.

Thereafter, in step ST73, the control unit 65 determines whether the printed circuit board 1 has passed the air curtain area 927a. The judgment criterion at that time is performed by comparing the time data D (i) output from the timer 65b with the board missing data D (S) of the printed circuit board 1 and detecting whether or not they match. . If the printed circuit board 1 does not pass through the air curtain area 927a, the information comparison detection process is continued.

When the printed circuit board 1 passes through the air curtain area 927a, the time data D (i) and the board removal data D (S) coincide with each other and the removal time tj is determined. Therefore, in step ST74, the blower mechanism 99a is driven. Control to resume. At this time, the control unit 65 outputs curtain control data D95 based on the board removal data D (S) of the printed board 1 to the air curtain driving unit 95. The air curtain drive unit 95 outputs a motor control signal S9a that turns on the motor 96a. When the motor 96a is turned on, the fan unit 919 rotates. Thereby, the ventilation mechanism 99a can be operated based on the board missing data D (S) of the printed board 1.

Further, in step ST75, the control unit 65 determines whether or not the printed circuit board 1 has approached the second air curtain area 927b. In this case, the determination criterion is to compare the time data D (i) output from the timer 65b with the board arrival data D (Tb) of the printed circuit board 1 and detect whether they match. Is called. If the printed circuit board 1 is not approaching, the information comparison detection process is continued.

The substrate arrival data D (Tb) is calculated from the distance data D (Lb) and the conveyance speed data D (V). The board arrival data D (Tb) is information indicating an elapsed time from the time (corresponding to ta) when the printed board 1 is introduced into the carry-in entrance 10a until it reaches the second air curtain area 927b. The board arrival data D (Tb) corresponds to the time required to reach the air curtain area 927b. The distance data D (Lb) is information indicating a distance Lb (actual measurement) from the carry-in entrance 10a to the air curtain area 927b.

When the printed circuit board 1 approaches the air curtain area 927b, the time data D (i) and the board arrival data D (Tb) coincide with each other, and the approach time ti is determined. The operation of 99b is stopped. At this time, the control unit 65 outputs curtain control data D95 based on the board arrival data D (Tb) of the first printed circuit board 1 to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S9b that turns off the motor 96b. The fan unit 919 stops when the motor 96b is turned off. Thereby, based on the board | substrate arrival data D (Tb) of the printed circuit board 1, operation | movement of the ventilation mechanism 99b can be stopped.

Thereafter, in step ST77, the control unit 65 determines whether the printed circuit board 1 has passed through the air curtain area 927b. The judgment criterion at that time is to compare the time data D (i) output from the timer 65b with the board missing data D (S) of the first printed circuit board 1, and detect whether or not they match. Is done. When the printed circuit board 1 does not pass through the air curtain area 927b, the information comparison detection process is continued.

When the printed circuit board 1 passes through the air curtain area 927b, the time data D (i) and the board removal data D (S) coincide with each other and the removal time tj is determined. Therefore, the blower mechanism 99b is driven in step ST78. Control to resume. At this time, the control unit 65 outputs curtain control data D95 based on the board removal data D (S) of the printed board 1 to the air curtain driving unit 95. The air curtain driving unit 95 outputs a motor control signal S9b that turns on the motor 96b. When the motor 96b is turned on, the fan unit 919 rotates. Accordingly, the blower mechanism 99b can be operated based on the board missing data D (S) of the printed board 1.

As described above, according to the reflow apparatus 200 including the air blowing mechanisms 99a and 99b for forming the air curtain areas 927a and 927b according to the fifth embodiment, the printed circuit board 1 to which the electronic components are attached is put into the reflow apparatus 200. Then, preheating is performed in the preheating zone Z1, and the printed circuit board 1 after the preheating is conveyed to the heating zone Z2. In the case where the electronic component is soldered to the printed circuit board 1 in the heating zone Z2, the control unit 65 that drives the air blowing mechanisms 99a and 99b in the idling state includes the board input data D (t) and the distance data D (La). , D (Lb) is processed by software. Then, the control unit 65 calculates the substrate length data D (x), the substrate arrival data D (Ta), D (Tb), and the substrate missing data D (S) in real time, and supplies these information to the air curtain driving unit. It was set to 95.

Even if the lengths of the printed circuit boards 1 are different from each other, the control unit 65 performs the circuit board length data D (x), board arrival data D (Ta), D (Tb), and board missing data D (S) Based on the above, it is possible to stop the air blowing immediately before the printed circuit board 1 passes through the air curtain areas 927a and 927b. At the same time, the control unit 65 stops the blowing while the printed circuit board 1 is passing, and the blowing can be resumed immediately after the printed circuit board 1 passes through the air curtain areas 927a and 927b.

Therefore, even if the lengths of the printed circuit boards 1 are different from each other, generation of turbulence is given priority over the function of blocking the atmosphere on the conveyance path by the air blowing mechanisms 99a and 99b forming the air curtain areas 927a and 927b. Can be prevented. The printed circuit boards 1 having different lengths can pass through the two air curtain areas 927a and 927b without causing turbulence. This makes it possible to provide a reflow device with two air curtain areas 927a and 927b having a turbulent flow generation prevention function.

In addition, the 1st air curtain area 927a brings about the heat insulation effect between the heating zone Z2 and the cooling zone Z3. According to the heat insulating effect of the air curtain area 927a, the outflow of the high temperature atmosphere from the heating zone Z2 to the cooling zone Z3 is prevented, or the inflow of the low temperature atmosphere from the cooling zone Z3 to the heating zone Z2 is prevented.

Also, the second air curtain area 927b provides a heat insulating effect and an outside air intrusion preventing effect between the heating zone Z2 and the carry-out port 10b. According to the heat insulating effect and the outside air intrusion preventing effect of the air curtain area 927b, the cooling atmosphere outflow from the cooling zone Z3 to the outside air is prevented, and the low temperature atmosphere inflow from the outside air to the cooling zone Z3 is prevented.

Of course, a plurality of air curtain areas 927a and 927b may be applied to the jet soldering apparatus 100 described in the first embodiment. In this case, an air curtain area 927a may be disposed between the chamber 50 of the jet soldering apparatus 100 and the cooling processing unit 90. A similar heat insulation effect can be expected.

<Air curtain mechanism with shutter function>
Next, a configuration example and an operation example of the air blowing mechanism 99c with a shutter function according to the sixth embodiment will be described with reference to FIGS. The blower mechanism 99c shown in FIG. 15 has a shutter mechanism 950 that is controlled to be opened and closed by the control unit 65. The shutter mechanism 950 is disposed between the blower 904 and the cooling unit mounting base 908, for example.

The shutter mechanism 950 includes a mechanism main body portion 951, a shutter portion 952, a connecting rod 953, and a solenoid portion 954. The mechanism main body 951 forms a housing having an opening at a predetermined site. The opening of the mechanism main body 951 has the same size as the opening of the exhaust port 912. The opening of the mechanism body 951 and the opening of the exhaust port 912 are aligned and attached to the cooling unit mounting base 908.

A shutter portion 952 is slidably incorporated in the mechanism main body portion 951. The shutter portion 952 has a flat plate shape and has an area that blocks an opening portion of the mechanism main body portion 951 (an opening portion of the exhaust port 912). The shutter unit 952 closes or opens the exhaust port 912 of the blower mechanism 99c. The shutter portion 952 shown in FIG. 15 is in an open state.

A connecting rod 953 is connected to the shutter portion 952. The connecting rod 953 is connected to a solenoid portion 954 that constitutes an example of a drive portion. The solenoid portion 954 movably engages the connecting rod 953, and the solenoid portion 954 is driven to open and close so as to slide the shutter portion 952 via the connecting rod 953. The shutter portion 952 operates so as to block the opening portion of the mechanism main body portion 951 (the opening portion of the exhaust port 912) by the solenoid portion 954. These constitute a shutter mechanism 950.

In this example, an air curtain driving unit 95 and a motor 96 are connected to the control unit 65 shown in FIG. The controller 65 drives the motor 96 directly. For example, the motor control signal S96 is output to the motor 96 when the power is turned on. The motor 96 controls the motor control signal when the soldering apparatus is idling, when the printed circuit board 1 is in the process of soldering, and while the printed circuit board 1 passes through an air curtain area (not shown). The fan unit 919 is continuously rotated based on S96.

On the other hand, a solenoid unit 954 constituting an example of a drive unit is connected to the air curtain drive unit 95. The air curtain drive unit 95 generates a solenoid control signal S9c based on the curtain control data D95 input from the control unit 65. The air curtain driving unit 95 outputs a solenoid control signal S9c to the solenoid unit 954. The solenoid unit 954 opens and closes the shutter unit 952 based on the solenoid control signal S9c.

For example, when opening the shutter mechanism 950 and blowing air from the blower mechanism 99c to the conveyance path, the air curtain driving unit 95 generates a high-level solenoid control signal S9c based on the curtain control data D95 input from the control unit 65. Generate. The solenoid unit 954 opens the shutter unit 952 based on the high-level solenoid control signal S9c (ON control of the solenoid unit 954). As a result, air is blown from the blower mechanism 99c to the transport path via the blower 904, and an air curtain area (not shown) is formed.

In addition, as shown in FIG. 16, when the shutter mechanism 950 is controlled to be closed and air blowing from the blowing mechanism 99 c to the conveyance path is stopped, the air curtain driving unit 95 uses the curtain control data D95 input from the control unit 65. Based on this, a low-level solenoid control signal S9c is generated. The solenoid unit 954 closes the shutter unit 952 based on the low-level solenoid control signal S9c (off control of the solenoid unit 954). Thereby, the ventilation of the air from the air curtain area which is not illustrated to a conveyance path | route is blocked | prevented. During this time, since the motor 96 is driven, the blower 904 allows air to escape through the openings 956 and 957. This air may be positively used for other functions.

Thus, according to the air blowing mechanism 99c according to the sixth embodiment, the shutter mechanism 950 is disposed between the air blower 904 and the cooling unit mounting base 908, and the shutter mechanism 950 is controlled to be opened and closed by the control unit 65. Is.

This opening / closing control makes it possible to instantaneously stop or restart the blowing of air from the blowing mechanism 99c to the conveyance path. Therefore, in the board | substrate carry-out port 902 of the jet soldering apparatus 100, between the chamber 50 and the cooling process part 90, the carry-out port 10b of the reflow apparatus 200, between the heating zone Z2, and the cooling zone Z3 etc., it is instantaneous. The air curtain area (not shown) can be formed or not formed (see FIGS. 6A to 6D).

The air blow prevention by the shutter mechanism of this embodiment may be combined with the function of stopping the air blowing described in the first to fifth embodiments. By comprising in this way, it can be ensured that the air curtain areas 927 and 927b are formed or not formed.

The present invention has an air curtain area, jets solder to a part mounting location of a printed circuit board, and performs soldering processing on the printed circuit board and an electronic component. By applying a reflow process to the printed circuit board on which the electronic component is mounted, the present invention is extremely suitable for application to a reflow apparatus for soldering the electronic component and the printed circuit board.

7 Molten solder 8,9 Pump 10 Transport unit 11 Chain member 12 Transport chuck 14 Transport drive unit 15, 46, 68, 69, 94, 96, 98 Motor 16 Monitor 18 Substrate detection sensor (detection unit)
20 Heat treatment part 21 to 24 Preheating zone 25 Preheating drive part
26 to 29, 42, 67 Heater 30 Lid support / sealing mechanism 31 to 34, 91, 92 Lid 40 Partition member moving mechanism 43 Laverin portion (partition member)
44 Fan 48 Cooling member 50 Chamber (processing vessel)
52 Conveyor 60 Jet solder bath 61, 62 Spray nozzle 64 Input unit 65 Control unit 65a Counter 65b Timer 65c Comparison operation unit 65d Memory unit
70 Both-end gas supply mechanism 71 to 73, 741 Gas supply unit 74 N2 gas tank 75 Nozzle conduit 80 Lid unit 81 Gas cleaning unit (atmosphere cleaning unit)
82 Pipe 90 Cooling processing unit 93 Cooling drive unit 95 Air curtain drive unit 99, 99a, 99b, 99c Blowing mechanism 100 Jet soldering device
101 Main body frame 102 Beam frame members 103 to 106 Legs
200 Reflow device 801, 803 Atmosphere inlet 802, 804 Atmosphere outlet 904 Blower 905 Lower guide plate 906 Upper guide plates 927, 927a, 927b Air curtain area 950 Shutter mechanism

Claims (8)

1. In the soldering apparatus for preheating the board on which the electronic component is mounted, transporting the board after the preheating to the soldering processing unit, and soldering the electronic component to the board,
   A blower mechanism which is provided at a predetermined position of a transport path for transporting the substrate and forms an air curtain area for blowing gas on the transport path to block the atmosphere;
   A soldering apparatus comprising: a control unit that controls the blower mechanism so as to send or stop gas to the air curtain area in response to a passage timing of the substrate passing through the air curtain area. .
2. The air blowing mechanism controlled by the control unit is
   A main body having an intake port and an exhaust port at a predetermined position;
   A fan part that is rotatably engaged in the main body part and blows out the gas sucked from the intake port from the exhaust port;
   The soldering apparatus according to claim 1, further comprising: a driving unit that drives the fan unit.
3. The controller is
   The drive unit is turned on to blow gas from the blower mechanism to the conveyance path to form the air curtain area, and the drive unit is turned off to stop blowing gas from the blower mechanism to the conveyance path. The soldering apparatus according to claim 2, wherein:
4. In the soldering apparatus for preheating the board on which the electronic component is mounted, transporting the board after the preheating to the soldering processing unit, and soldering the electronic component to the board,
   A blower mechanism that is provided at a predetermined position of a transport path for transporting the substrate and forms an air curtain area that blows gas on the transport path to block the atmosphere;
   A shutter mechanism provided at an exhaust port of the blower mechanism;
   A soldering apparatus comprising: a control unit that controls the shutter mechanism so as to send or stop the gas to the air curtain area in response to the passage timing of the substrate passing through the air curtain area. .
5. The shutter mechanism that is controlled to open and close by the control unit,
   A shutter part for closing or opening the exhaust port of the air blowing mechanism;
   The soldering apparatus according to claim 4, further comprising: a drive unit that opens and closes the shutter unit.
6. The controller is
   The drive unit is turned on to open the shutter unit, and air is blown from the blowing mechanism to the conveyance path to form the air curtain area, and the drive unit is turned off to control the shutter unit. 6. The soldering apparatus according to claim 5, wherein a gas is blown from the air blowing mechanism to the conveyance path in a closed state.
7. A detection unit that detects the substrate put into the transport path and outputs substrate loading information;
   The controller is
   Substrate length information indicating the length of the substrate in the transport direction based on the substrate loading information output from the detection unit;
   Substrate arrival information indicating the elapsed time from the time when the substrate is put into the transport path to the air curtain area,
   The soldering apparatus according to any one of claims 1 to 6, wherein board missing information indicating a time at which the board leaves the air curtain area is calculated.
8. The soldering device according to any one of claims 1 to 7, wherein air, an inert gas, or a mixed gas thereof is introduced into the main body of the blower mechanism.

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