JP2003205386A - Gas injection nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas injection nozzle which, for example, injects an inert gas into a space for soldering operation uniformly, efficiently and without drawing air into the space. <P>SOLUTION: With one end of the nozzle body (21) blocked, the gas injection opening (22) is formed continuously or intermittently along the longitudinal direction. Using a porous metallic body, pressure adjusting bodies (23, 25, 40) are formed. The pressure adjusting bodies are inserted into the nozzle body longitudinally almost over the entire length, supplying gas from the end corresponding to the other end of the nozzle body. The pore size of the pressure adjusting bodies is such that the gas release into the nozzle body essentially becomes uniform in the longitudinal direction by adjusting the supply pressure. At least one side edge of the gas injection opening is provided with current plates (24) for controlling the direction of the injection gas. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas injection nozzle, and, for example, in a jet type soldering apparatus, an inert gas is uniformly and efficiently injected into a space where soldering work is performed, and further, an inert gas is injected without entrainment of air to provide a stable nozzle. The present invention relates to a nozzle capable of forming an active gas atmosphere.

[0002]

2. Description of the Related Art For example, in a jet soldering apparatus, a solder jet nozzle having a nozzle opening is provided below a conveyor.
A method is used in which the molten solder is sent toward the jet opening by the jet pump to jet the molten solder, while the work is conveyed by the conveyor and the soldering part of the work is brought into contact with the jet solder for soldering. It is often done.

In recent electronic devices, packaging density has been increased, and high quality soldering tends to be required.

Therefore, a gas injection nozzle is provided so as to be directed near the jet port, and an inert gas is jetted to create an atmosphere of the inert gas near the jet port.

[0005]

However, in the case of the conventional gas injection nozzle, when the jet opening is relatively small, the inert gas atmosphere to be formed is also relatively small and the consumption of the inert gas is small. When the jet opening becomes large, such as 300 mm × 200 mm or 500 mm × 300 mm, the amount of inert gas that is wasted increases, and it is not only necessary to inject a large amount of inert gas, but also air is easily trapped in the atmosphere. , High quality soldering was sometimes difficult.

In view of the above problems, the present invention provides a gas which is capable of forming a stable inert gas atmosphere by uniformly and efficiently injecting an inert gas into a space in which a soldering work is performed and without entraining air. An object is to provide an injection nozzle.

[0007]

Therefore, a gas injection nozzle according to the present invention is a gas injection nozzle for uniformly injecting a gas into a space where a gas atmosphere is to be formed, and one end of which is closed to form a gas injection port portion. Is formed using a porous metal body and the nozzle body formed continuously or intermittently along the longitudinal direction, and is inserted into the nozzle body over substantially the entire length in the longitudinal direction. Gas is supplied from the end corresponding to the end, and the supply pressure is adjusted to adjust the supply pressure so that the amount of gas released into the nozzle body is substantially uniform in the longitudinal direction. A body and a straightening plate portion that is provided on at least one of the side edges of the gas injection port portion of the nozzle body and that controls the direction of the gas injected from the gas injection port portion.

One of the features of the present invention is that a pressure adjusting body made of a porous metal body is inserted into the nozzle body, and gas is supplied into the nozzle body via the pressure adjusting body so that the supply pressure is prolonged. The point is that the amount of gas released into the nozzle body is made substantially equal in the longitudinal direction.

As a result, the gas can be uniformly ejected over the longitudinal direction of the nozzle body, so that the inert gas can be uniformly ejected from the surroundings even in the case of a jet type soldering device having a relatively large jet port. While you can
Air is not entrained in the gas jet stream, and a stable inert gas atmosphere can be formed near the jet port.

As the porous metal body, for example, a porous metal body commercially available from Global Electronics Co., Ltd. can be used. Since this commercially available porous metal body has a porous pore size in the range of several μm to several hundred μm, it can be appropriately selected according to the application of the nozzle, the gas injection amount, and the like. Further, the pressure adjusting body may have a plate shape or a pipe shape.

The form of the nozzle body is not particularly limited,
In the case of uniformly injecting a gas into a large space, it is preferable to have a passage shape. That is, it is preferable that the nozzle body is arranged along the space and has a passage shape for injecting gas from the periphery of the space toward the space.

In the present invention, the pressure adjusting body is inserted into the nozzle body, but the same effect can be obtained by providing the pressure adjusting body so as to cover the gas injection port.

That is, the gas injection nozzle according to the present invention is a gas injection nozzle for uniformly injecting gas into a space in which a gas atmosphere is to be formed, and has one end blocked and a gas injection port extending in the longitudinal direction. A nozzle body, which is formed continuously or intermittently and is supplied with gas from the other end, and a porous metal body, is fixed so as to cover the gas injection port of the nozzle body, and is supplied with gas. A pressure adjusting body having a porous hole diameter such that the amount of gas injected from the gas injection port is substantially uniform in the longitudinal direction by adjusting the pressure, and the gas injection port side of the nozzle body. And a rectifying plate portion that is provided on at least one of the edges and that controls the direction of the gas injected from the gas injection port portion.

The pressure adjusting body may be provided so as to cover the gas injection port portion, and may be of a fitting type, for example.

Although a porous metal body is used in the above,
The same effect can be expected by using a pseudo pipe body in which a strip-shaped metal plate is spirally wound and a locking portion is formed on one side of the plate width direction, and a locking receiving portion is formed on the other side to mutually lock .

That is, the gas injection nozzle according to the present invention is a gas injection nozzle that uniformly injects gas into a space where a gas atmosphere is to be formed, and has one end blocked and a gas injection port extending in the longitudinal direction. A nozzle main body formed continuously or intermittently, and a locking portion that is a spiral winding of a strip-shaped plate material having a locking portion formed on one side in the width direction and a locking receiving portion formed on the other side and adjacent to each other. It is formed by using a pseudo pipe body in which the lock receiving portions are locked to each other, and is inserted into the nozzle main body over substantially the entire length in the longitudinal direction, and gas is supplied from the end corresponding to the other end of the nozzle main body. By adjusting the supply pressure, a gap is provided between the locking portion and the locking receiving portion such that the amount of gas released into the nozzle body is substantially uniform in the longitudinal direction. Elastic force of plate materials that make up the body A pressure adjusting body formed against the pressure regulating body, and a flow straightening plate portion that is provided on at least one of the side edges of the gas injection port portion of the nozzle body and that controls the direction of the gas injected from the gas injection port portion. It is characterized by having.

[0017]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. 1 to 5 show a preferred embodiment of a gas injection nozzle according to the present invention. In the figure, the jet-type soldering device 10 has a molten solder bath (not shown) built therein, and a transport conveyor (not shown) for locating a work is arranged above the molten solder bath. Two jet holes 11 are formed, and a heater (not shown) is provided on the peripheral wall surface and / or the bottom wall surface of the molten solder bath so that the molten solder is stored in the molten solder bath. .

Further, the jet type soldering device 10 is provided with a gas jet nozzle 20 of this embodiment so as to surround the jet port 11. As shown in FIG. 2, the nozzle body 21 of this gas injection nozzle 20 has a passage shape with a quadrangular cross section, one end side of the nozzle body 21 is closed, and a gas injection port 22 is provided on the side wall of the nozzle body 21. It is formed continuously in the longitudinal direction.

Further, the pressure adjusting body 2 is provided in the nozzle body 21.
3 is inserted over the entire length. This pressure regulator 2
3 is manufactured in a pipe shape using a porous metal body, and gas, for example, high temperature nitrogen gas is supplied from an end portion corresponding to the other end side of the nozzle body 21.

The pressure adjusting body 23 has a porous hole diameter such that the amount of gas released into the nozzle body 21 becomes substantially uniform in the longitudinal direction by adjusting the supply pressure of nitrogen gas. .

In fact, the gas injection port 22 of the nozzle body 21
The straightening vane portions 24 are integrally formed on both upper and lower edges, and the direction of the gas ejected from the gas ejection port portion 22 is controlled.

Now, when high temperature nitrogen gas is supplied to the pressure adjusting body 23, the nitrogen gas flows through the pressure adjusting body 23. However, if the supply pressure is appropriately set, the pore size of the pressure adjusting body 23 is porous. The gas pressure in the pressure adjusting body 23 is well balanced, and the amount of gas discharged from the pressure adjusting body 23 into the nozzle body 21 becomes substantially uniform over the entire length in the longitudinal direction of the pressure adjusting body 23.

Then, the gas injection port 2 of the nozzle body 21
Nitrogen gas is jetted substantially uniformly from 2 over the entire length in the longitudinal direction, and the jetted nitrogen gas is controlled in direction by the straightening plate portion 24, so that it is guided to the vicinity of the jet port 11 without being wasted. As a result, a high-temperature nitrogen gas atmosphere is formed in the vicinity of the jet port 11 in a stable manner and without air entrainment.

FIG. 3 shows a second embodiment, in which the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts. In this example, the pressure adjusting body 25 made of a porous metal body is fitted and fixed to the gas injection port portion 22 of the nozzle body 21,
In this way, the pressure adjusting body 25 may be fitted into the gas injection port portion 22 of the nozzle body 21.

FIG. 4 shows a third embodiment, in which the same reference numerals as those in FIG. 3 denote the same or corresponding parts. In this example, the nozzle body 21 has a circular cross section, and its gas injection port 22
While the pressure adjusting body 25 made of a porous metal body is fitted and fixed by welding, the current plate portion 24 is provided only on one side edge of the gas injection port portion 22.

FIG. 5 shows a fourth embodiment, in which the same reference numerals as those in FIG. 3 denote the same or corresponding parts. In this example, the nozzle body 21 has a substantially pentagonal cross section, and the adjacent two
The space between the two inclined side portions is opened to form the gas injection port portion 22, and the inclined side portion is used as the current plate portion 24.

FIG. 6 shows a fifth embodiment, in which the same reference numerals as those in FIG. 3 denote the same or corresponding parts. In this example, the gas injection port portions 22 are formed on opposite side walls of the nozzle body 21, and the pressure adjusting body 25 is fitted therein.

FIG. 7 shows sixth and seventh embodiments as reference examples. This example is an example applied to a nitrogen gas injection iron used for preheating and melting of solder, soldering, reflow, etc.
A gas injection port 32 is formed on the tip side of the trowel main body 30, while a pressure adjusting member 31 made of a porous metal body closes the inside of the trowel main body 30 behind the gas injection port 32. It is fixed.

In this example, the function of the pressure adjusting body 31 allows the gas to be uniformly ejected from the gas ejection port 32.

FIG. 8 shows an eighth embodiment. The present example has the same structure as the first to fifth embodiments, but the pressure adjusting body 40 is configured by using a pseudo pipe body instead of the porous metal body, and thus the first to fifth embodiments. Different from

That is, the pseudo pipe body is constructed by spirally winding a strip-shaped metal plate (strip-shaped plate material) having a predetermined width, and a locking portion 41 is formed on one side of the strip-shaped metal plate in the width direction, and on the other side. The lock receiving portion 42 is formed, and the adjacent lock portion 41 and the lock receiving portion 42 are locked to each other.

The pressure adjusting body 40 is inserted into the nozzle body (not shown) over substantially the entire length in the longitudinal direction, and gas is supplied from the end portion of the pressure adjusting body 40 corresponding to the other end of the nozzle body, and the supply thereof. By adjusting the pressure, a gap is formed between the locking portion 41 and the locking receiving portion 42 against the elastic force of the strip-shaped metal plate forming the pseudo pipe body, and the pressure adjusting body 40 causes the nozzle body to move. The amount of gas released inward is substantially uniform in the longitudinal direction.

[Brief description of drawings]

FIG. 1 is a schematic view showing a preferred embodiment of a gas injection nozzle according to the present invention.

FIG. 2 is a perspective view showing a main part of the embodiment.

FIG. 3 is a main part perspective view showing a second embodiment.

FIG. 4 is a perspective view of an essential part showing a third embodiment.

FIG. 5 is a perspective view of an essential part showing a fourth embodiment.

FIG. 6 is a perspective view of an essential part showing a fifth embodiment.

FIG. 7 is a perspective view of essential parts showing sixth and seventh embodiments.

FIG. 8 is a perspective view of an essential part showing an eighth embodiment.

[Explanation of symbols]

10 Jet soldering device 12 Jet port 20 gas injection nozzle 21 Nozzle body 22 Gas injection port 23 Pressure regulator 23 Current plate 25 Pressure regulator 40 Pressure regulator

Claims (4)

[Claims] 1. A gas injection nozzle for uniformly injecting gas into a space where a gas atmosphere is to be formed, wherein one end is closed and a gas injection port is formed continuously or intermittently in the longitudinal direction. The nozzle body is formed by using a porous metal body, and is inserted into the nozzle body over substantially the entire length in the longitudinal direction. Gas is supplied from the end portion corresponding to the other end of the nozzle body, and the supply pressure thereof is increased. Is adjusted so that the amount of gas released into the nozzle body is substantially uniform in the longitudinal direction, and a pressure regulator having a porous hole diameter, and a side edge of the gas injection port of the nozzle body. A gas injection nozzle, comprising: a rectifying plate section that is provided on at least one side and controls the direction of the gas injected from the gas injection port section. 2. A gas injection nozzle for uniformly injecting gas into a space where a gas atmosphere is to be formed, wherein one end is closed and a gas injection port is formed continuously or intermittently in the longitudinal direction. A nozzle body to which gas is supplied from the other end and a porous metal body, which is fixed so as to cover the gas injection port of the nozzle body, and the gas supply pressure is adjusted to adjust the gas A pressure adjuster having a porous hole diameter such that the amount of gas injected from the injection port is substantially uniform in the longitudinal direction; and a pressure adjusting body provided on at least one of the side edges of the gas injection port of the nozzle body, A gas injection nozzle, comprising: a straightening vane portion that controls the direction of the gas ejected from the gas ejection port portion. 3. A gas injection nozzle for uniformly injecting gas into a space where a gas atmosphere is to be formed, wherein one end is closed and a gas injection port is formed continuously or intermittently along the longitudinal direction. The nozzle body is spirally wound around the nozzle body, and the strip-shaped plate material having the locking portion formed on one side in the width direction and the locking receiving portion formed on the other side, and the adjacent locking portion and locking receiving portion are locked to each other. Formed by using a pseudo pipe body, and inserted into the nozzle body over substantially the entire length in the longitudinal direction thereof, gas is supplied from an end portion corresponding to the other end of the nozzle body, and the supply pressure thereof is adjusted. Due to this, a gap between the locking portion and the locking receiving portion such that the amount of gas released into the nozzle body is substantially uniform in the longitudinal direction resists the elastic force of the plate material forming the pseudo pipe body. And a pressure regulator formed by A gas injection nozzle, comprising: a straightening plate portion that is provided on at least one of the side edges of the gas injection port portion of the nozzle body and that controls the direction of the gas injected from the gas injection port portion. 4. The gas injection according to claim 1, wherein the nozzle body is arranged along the space and has a passage shape for injecting gas from the periphery of the space toward the space. nozzle.