Electric heating – Inductive heating – Metal working
Patent
1995-05-11
1996-12-03
Leung, Philip H.
Electric heating
Inductive heating
Metal working
219643, 219674, 219647, 228 53, H05B 610, B23K 306
Patent
active
055804799
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an inductor tube for solder injectors with high-frequency inductive heating.
2. Brief Description of the Background of the Invention Including Prior Art
The present invention provides for a high-frequency inductor heating tube for solder injectors. A hollow cylinder is made of a thermally insulating material and is formed at a first end of the hollow cylinder as a cylindrical receiver tube having a floor and an inner borehole having a first diameter. Windings of an inductor are disposed over a length of the cylindrical receiver tube and forming together with the hollow cylinder an exchangeable component. A solder injector is formed as an exchangeable part and has an outer diameter matching the first diameter of the inner borehole and made of a highly heat-conducting base material covered with a ferromagnetic layer and disposed in the cylindrical receiver tube.
According to the conventionally known equipment of high-frequency heated solder injectors, an insulated induction coil, furnished with terminal wires, which is designated in the following as the inductor, is a fixed component. According to the German patent DE 3734550 C2, the function and the properties of such an inductor are described in detail. The insulated application of an inductor to a metal core proves to be extremely difficult in the context of the production method and is thus expensive.
SUMMARY OF THE INVENTION
1. Purposes of the Invention.
Therefore, it is an object to provide for an inductor tube for receiving a plurality of differently structured solder injectors, where the solder injectors have the property of an as much as possible unlimited stability and lifetime.
These and other objects and advantages of the present invention will become evident from the description which follows.
BRIEF DESCRIPTION OF THE INVENTION
The manufacture of a device component, which is suitable both for receiving solder injectors of the same diameter in a tube furnished with coil and which is also furnished with a thermal insulator with a following electrical connection, gives the user an unlimited application in the soft soldering technique to be automated.
The thermal balance between the end points of this device component will quickly establish itself based on the selection of a suitable oxide ceramic material. This results in a negligible thermal flux in the direction of the connector part and in a small length of the device.
This inductor tube, which is a component which can be easily produced, allows the economic mass production of solder injectors, which can be formed to mere mold parts and which can be adapted application-specifically at a highest degree to the respectively desired application.
In addition, the handling is simplified to such a degree that only a plug-in motion is necessary for an exchange of a solder injector.
It becomes possible to furnish the solder injector, if desired, with a tubular needle based on the separate disposition of the inductor and of the injector, where the flux agent can be fed in a most exactly metered and measured way in small quantities through the tubular needle to the soldering face, formed like a cone section and wetted by the solder.
The thermal conductivity value between the ferromagnetic covering, serving as a heat source, and an enlarged soldering face at the solder injector can be influenced only by the copper cross-section.
While the coil-free solder injector is characterized in its economic availability, the mechanically stable inductor tube with the possibility for the direct connection to a coaxial soldering cable offers a nearly unlimited service life.
The soldering wire is guided axially in a spaghetti insulating tubing in a coaxial soldering cable, while two copper braids, electrically insulated from each other, cover and sheathe in a concentrical arrangement the spaghetti insulating tubing as in an inner conductor and an outer conductor and furnish the supply of the inductors with high-frequency energy.
The nov
REFERENCES:
patent: 1893380 (1933-01-01), Uschman et al.
patent: 2306291 (1942-12-01), Alons
patent: 2620433 (1952-12-01), Denngen et al.
patent: 2810168 (1957-10-01), Nyborg
patent: 5231267 (1993-07-01), McGaffigan
Kasper Horst M.
Leung Philip H.
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