US930490A - Method of producing rods, tubes, wires, &c., direct from molten metal. - Google Patents

Description

A. H. PEHRSO-N. METHOD OF PRODUCING RODS, TUBES, WIRE, 150., DIRECT PROM MOLTEN METAL.

APPLICATION FILED no.1 1908. 930,490. Patnted Aug. .10, 1909.

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UNITED sTA ns PATENT OFFICE.

ADAM HELMER rnHnsoN, or GENTRALPALATSET, STOCKHOLM, SWEDEN.

ETHOD 0F PROISUGIN'G: RODS, TUBES, WIRE, &c.,- DIRECT FROM MOLTEN METAL.

, s-- Specification of Letters Patent.

Application filed December 1, 1908. Serial No. 465,496.

T 0 all whom it may concern:

Be it known that I, ADAM HELMER PEHR-. son, engineer, a subject of Sweden, residing. at entralpalatset, Stockholm, Sweden, have invented new and useful Improvements in Methods of Producing Rods, Tubes, Wire, &c., Direct from Molten Metal, of which the following is a specification.

As is well known many endeavors have been made to produce rods, ipes, wire, etc. direct from molten metal y' causing the metal to ass through cooled nozzles in which it may solidify successively. These endeavors have not'been successful, and for the follow- .ing reasons: the tendency of the metal to stick to the nozzle, the impossibility of cooling the metaldirect by water, and mainly by reason of the shrinking of the metal during its coolingso that the surface of the metal rod will more and more depart from the inside of the cooling nozzle, and cause betweenthe rod and the nozzle a space which will greatly prevent the cooling'of the rod by the nozzle, and which may cause the incandescence and melting of the rod.-

My invention relates to a method whereby the above mentioned drawbacks ,may be avoided, so that the metal which passes through'the cooled nozzle may be cooled in a rapid and ei licient manner. This method, is based on the observation of the-fact that an efficient cooling can only be obtained by bringing the incandescent mass of metal into contact with cold -metallic surfaces of suf- The method consists in giving the rod'or the nozzle or both of them such a relative motion that the parts of them which are in contact are changing all the time, or in other words that the abovementioned insulating space, caused by shrinking of the rod, chan es position continually so that its hurtful action will be decreased andthe cooling efiect of the nozzle will be better, and a continuous formation of rod from the molten metal will therefore be possible. It is of course also necessary that these surface contacts are sufliciently large to cause efficient cooling. The

' manner of motion of-the rod or the nozzle will be brought into engagement wit fresh surfaces of the nozzle that will greatly Patented. Aug. 10, 1909.

In the accompanying drawing is shownas socket joint 3, which isjournaled between two stationary pipes 4 for cooling water. The lower end of pipe -2 supports reaction turbine 5 having a tangential outlet at one side only, and which operates'in such a manner. that it gives to the said pipe 2 as well as to the nozzle 1 a swinging or gyratory motion around the centrally proceeding metal a rod, the surface of which will therefore continually be brought into contact with fresh surfaces in the nozzle, so that the cooling will be efficient. a ball member 3 have a kind of universal oint movement on the socket portion formed y the two pipes 4, so that the pipes 1 and 2 can swing in the path of a cone. The cooling water entering through the pipes 4 and having exit tangentially through the turbine 5 by the reaction of the latter will cause the pi es 1 and 2 to havea rotary movement that W1 1 not be along the axis of the pipe, but will swing through the path of a cone, because the reaction is on one side only of the ipe 2. This will be somewhat in the nature 0 a gyratory motion in its nature, and the surface of the metal rod or tube formed in the ipeh 1 t e facilitate and expedite the cooling of the member that is being cast.

Having now particularly described and ascertained'the nature of-my said invention and in what manner the same'is to be performed, I declare that what I claim is:

1. The method of roducing bars, rods, pi es, wire etc. directly from molten metal w 'ch consists in passing the molten metal through a cooled nozzle, and simultaneously giving to the nozzle, and to the pass ng metal rod or tube such a movement relative to each other that the insulating space caused by shrinkingof the rod when solidifying Wlll continually change position, in order to cause different parts of the inside surface of the nozzle to successively make contact with different parts of the metal passing throu h the nozzle, so that the cooling action of the The pipes 1 and 2 carrying nozzle will be increased, and a continuous formation of rod will be possible.

2. The method of reducing bars, rods, pilpes, wire etc. direct y from molten metal w ich consists in passing the molten metal through a cooled nozzle, and simultaneously giving to the nozzle and to the passing metal rod such a gyratory swinging movement relashrinkageof the rod when through a nozzle cooled by the passage of water between itself and an inclosing jacket whereby the passage of the water wil impart movement relatively to the nozzle and the bar, so that the insulating space caused by solidifying wil continually change osition in order to cause. different parts of t 1e inside surface of the nozzle to successively make contact with different parts of the metal passing throu h the nozzle, so that the cooling action of the nozzle will be increased, and a continuous formation of rod will be ossible.

In testimony whereof I have signed my name to this specification in the presence of two subscribin Witnesses.

ADA HELMER PEHRSON.

Witnesses:

.JoHN EDBERG, 4 HJALMAR ZETTERSTROM.

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