SU1232407A1 - Method of producing heating element of soldering iron - Google Patents

Description

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The invention relates to the field of soldering and can be used in the manufacture of pails.

The aim of the invention is to increase the efficiency of the heating element.

Fig, shows the heating element 5 section; in fig. 2 - a blank for the manufacture of a spiral; in fig. 3 - the same, after flattening; in FIG. 4 - pa lnik, section; in fig. 5 is a section A-A in FIG. 4.

The blade contains a heating element made in the form of a bifil of a p / helix 1 made of resistive tape, for example nichrome. The spiral is located on an insulating gasket 2 of mica and is installed inside a quartz tube 3 o. The spiral is made in the form of a ribbon and has round ends 4 for connection with the current leads 6 located in the handle 5 with the attachment unit 7. The heating element and the partial soaking rod 8 are installed inside the metal holder 9, fastened with a handle with a screw 10 screwed into the sleeve 11, the Soldering rod is extended to a different depth and fixed in the holder by a screw 12 Current leads 6, which are welded to the current leads 13 , enclosed in an insulating fluoroplastic tube 14, is attached to handle 5 with screws 15.

The heating element of the steam iron is made as follows.

The billet of nichrome wire of circular cross section and a predetermined length is pre-folded in half, tied with the help of plinging machines into a tape of the required thickness, while the end of the blank is left half 324072

flattened, annealed. Then, a mica gasket and a 5-pitch bifilon with a constant 5-step are put a ribbon on it on a mandrel that fits the size of the firing rod, and then the finished heating element is removed from the mandrel. Pre-rolled tape cannot be used, since it cannot be bent. 10 Severe deformation at the point of inflection will lead to overheating of the helix and its rapid burnout.

The heating element is installed in a steam iron. Not only mechanical fastening can be used for fastening the current 5 inlets 6 with the ends 4 of the spiral, but also contact spot welding of the ends of the spiral with current leads, which in this case 30 are in the form of rods from a hoard.

Due to the tight fit of the tape helix to the insulating strip, reliable thermal contact with the steaming rod is ensured, which leads to an increase in the efficiency of the heating element.

In the range of the tip temperature of a 25–20 ° C steam rod, the relative increase in the efficiency of the proposed heating element is, and the increase in the tip temperature (at the same power consumption of 35) is 50–70 C.

The execution of the ends of the spiral with a circular cross section provides, along with an additional increase in efficiency, the convenience of connecting to the current leads, and 40 also provides a lower temperature of the handle of the blade.

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Editor L.Gratillo

Compiled by E. Tyutchenkova Tehred I. Gaidosh.

Order 2727/13

Circulation 1001 Subscription

VNISHI USSR State Committee

for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., A

Proofreader S. Shekmar

Claims (2)

(56) Copyright certificate of Czechoslovakia No. 155552, cl. 21 h 11/01, 1970. (54 1. METHOD FOR MANUFACTURING A HEATING ELEMENT OF A SOLDERING HOUSE in which a resistive wire is bifirally wound onto an insulating pad, characterized in that in order to increase the efficiency of the heating element, the wire is doubled before winding and flatten, after which they produce heat treatment. 2. The method of pop. 1, characterized in that, in order to improve the convenience of connecting to current leads and reduce overheating of the soldering iron handles flatten the middle part of the wire.