US1593518A - Hot top - Google Patents

Description

E. J. TURNER Filed Jan. 25, 19,26

1 l l l l l I l l x l I Il July 20 1926.

INVENTOR Patented July 20), w26.

ERNEST J. TURNER, 0E PITT'URGE, PENNSYLVANIA..

EOT TGP.

Application led January 26. 1926. serial Ito. 88,841

The present invention relates broadly to ingot making, and more particularly to an improved form of hot top adapted for bodily addition to an ingot mold in known manner to improve the character of the ingot which is produced in the mold.

It is known at the present time to make hot tops in whole or in part of refractory material, or of slag, cinders, cement or the like. It is also known to make hot tops of a wide variety of shapes, being governed by the contour of the mold with which the hot top is to be used.

My invention relates to an improvement in hot tops irrespective of their contour or composition, and may be embodied in any of the above or other types of hot tops. One of the objects of this invention is to decrease the weight of the hot top whereby the handling thereof is facilitated, and to improve its heat insulating properties. These 1mproved results are conveniently obtained by forming the hot top of generally cellular nature with a, plurality of suitably arranged, and preferably closed air lspaces connected by relatively narrow webs. A

In the accompanying drawings there is shown more or less diagammatically for purposes of illustration only one form of hot top embodying the present invention, it being understood that the drawings do not define the limits of my invention as changes in the construction, contour, arrangement and location of supporting means and the like may be made at will without departing from the spirit of the invention or the scope of my broader claims. v

In the drawings:

Figure 1 is a top plan view of a hot top embodying the present invention; and

Figure ,2 is a side elevation of the construction illustrated in Figure 1.

' In carrying out the present invention any desired composition may be determined upon and thereafter formed into suitable shape by molding, extrusion or the like, as customary for example, in the manufacture of hollow tiles to t ereby provide a body portion 2 of any desired contour with suitable supporting means Such as ribs, lugs or the like. The Walls of the body portion are preferably compound, comprising an inner shell 4- and an outer shell 5 connected by relatively narrow ribs or webs 6 provlding a minimum area of solid wall space the shape usually throughout the main body of the tile consistent withthe desired strength. Intermediate these ribs or webs are cells or air spaces 7,. The hot top formed as herein recited, may be completed in any desired manner as by mudding over the ends of the cells or air spaces to thereby provide closed air pockets minimizing heat transfer and radiation from the interior of the hot top outwardly.

It will be understood by those skilled in the art that not only does a construction of the character herein indicated function to maintain thel metal adjacent the upper end of the ingot in molten condition for a longer period than has been possible with hot tops as heretofore constructed where provision for actual combustion or slow burnin has not been provided, but that it materia y decreases the weight of the hot tops, thereby facilitating handling.

In practice it has been found that due to the better insulating properties of a hot top of cellular construction, the tendency to spall or ycrack is reduced to a minimum.

The present hot top lends itself to coating or impregnation in known manner with suitable waterproong compounds where desired, and also to coating with any desired material, fusible or otherwise, adapted to facilitate subsequent relative movement between the shrinkage ingot and the hot top.

The advantages of the present invention arise from the provision of a generally cellular hot top of any desired contour and composition which may, if desired, be left in its natural state or coated or impregnated in known manner with any desired materials as now contemplated in the art.

I claim: p

1. A s an article of manufacture, a hot top formed of refractory material having a plurality of air spaces formed in the walls thereof.

2. As an article of manufacture, a hot top formed of refractory material having compound walls connected by webs providing air spaces therebetween.

3. As an article of manufacture, a hot top for ingot molds formed of refractory material having at least a portion of its Walls formed with a closed-in air pocket.

In testimony whereof I have hereunto set m hand.

y ERNEST J. TURNER.

, after being partially

Images