US1784346A

US1784346A - Cooling means for castings

Info

Publication number: US1784346A
Application number: US416232A
Authority: US
Inventors: Fobus Ludwig
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-01-02
Filing date: 1929-12-24
Publication date: 1930-12-09
Anticipated expiration: 1947-12-09

Description

Dec. 9, 1930. FBUS 1,784,346

COOLING MEANS FOR CASTINGS Patented 9, 1930 PATENT OFFICE LUDWIG FnUs, or DORTMUND-Barton GERMANY COOLING nEaNs ron. cas'rINGs Application led December 24, 1929, Serial No. 416,232, and iin Germany January 2, 1929.

This invention refers to the art of cooling castings and the like and in particular of steel castings and it is intended to facilitatethe casting operation and to obtain a more uniform, gradual and thorough cooling action than it is possible With'most of the means heretofore suggested, and it is a further object of the invention to greatly simplify and cheapen the construction and manufacture of casting means for the purpose referred to. The invention among other uses and advantages is particularly adapted for the cooling of steel castings in which the masses are unevenly distributed, and when employed in this connection, it will prevent the occurrence of injurious tensional strains in the castings lduring the cooling procedure.

AsV compared with cooling bodies for the purposes mentioned, as disclosed by the previous art, and `comprising mostly bodies of wire adapted to be bent into any suitable form and configuration, the cooling bodies according to this invention are particularly distinguished by the fact that they are made of sheet metal by a punching, stamping or similar process and by bending them into the desired shape. Thus, the method of manufacture is very considerably simplified and cheapened; furthermore than that, in view of the easy and ready shaping of the cooling -body obtained by the punching and bending operations a perfectly uniform cooling action may be obtained. `There is the further advantage that thecooling bodies of the in- Vention may be easily moulded, so as to assume angularly bent or curved shapes, to thereby adapt them to the particular configuration of the casting to be treated. Broadly considered, the cooling body of the invention has the shape Vof a rather ramifed structure,

by punching out a substantially oblong strip of sheet metal which is provided with lateral iaps or projections obtainedI by incisions or indentations and alternatingly bent upon opposite sides ofthe structure, similar to what has already been suggested in connection with supports for foundry cores. The said flaps or extensions may be of different lengths.

The invention will be more fully described by reference to the accompanyingl drawings, showing exempliiications of the subject matter of the invention. Figure l is a side View of the cooling body; Figure 2 is a top plan View of Figure 1, and Figure 3 is a front view 55 at right angle with relation to Figure 1 Figure 4 illustrates the iatly spread out cooling body according to Figures 1 and 2, and Figure 5 is a plan view of a modified construction of the cooling body-Figure 6 is a 60 lateral view of another form of embodiment, ho'wing a longitudinally extending cooling The cooling bodies are cut out or punched out from sheet metal of suitable thickness; 05 preferably a fundamental blank or structure in accordance with Figure 4 may be employed, constituting substantially a longitudinal or oblong strip of sheet metal at the longitudinal sides of which substantially rectangular recesses a are cut out which are staggeringly or alternatingly arranged, so as to formprojecting tongues b on opposite longitudinal sides. At the edges of these projections or tongues b the cooling'body is 75 provided with straight incisions, so as to allow of the iiaps or tongues b and the intermediate sections d to be bent out of the plane of the strip of metal. At its lower end the metal strip shows a pointed extremity cut so out from the body of the strip at f by means of which the cooling body is inserted in the moulding sand. Figures l and 3 show the final shapev of the cooling body in which the aps or tongues b of each side are. bentvat right angle respectively towards the right and towards the left side. By' this means a uniformly ramiied structure is obtained which is .accordingly adapted toproduce a uniform4 cooling action. Such bodies are 90 frequently designated as chaplets in the foundry art.

The bending of the flaps or tongues or projections b and d may obviously be effected inlany other manner, so that the flaps or tongues fof a vertical row may for instance be alternatingly bent upon opposite sides, and the shape and length of the iaps may be different. Thus for instance and as shown in Figure 5, the flaps and tongues b and d to be obtained the several iaps or tongues may may be curved andof different lengths. The axial length of the cooling body may differ according to requirements and maycorrespond to the particular purposes. The coolilg bodies of comparatively greater length igure 6) may be made Without pointed ends. Along its central longitudinal axis the cooling body may be curved or bent in any desired manner in accordance with the particular shape of the casting.

The cooling bodies according to this invention are inserted or introduced into the mould in the usual manner at the desired places, so that, when the liquid metal is poured into the mould, the cooling bodies are thoroughly moulded thereto and produce the rapid cooling of the cast material on account of their large cooling surface and thereby obviate the occurrence of injurious tensional strains within the casting. At those points where a particularly great cooling action is be of comparatively longer shape and may be curved, when they are bent out of their plane (Figure 5), by which means the cooling surface is increased.

While I have described and illustrated in the drawings 'what I consider some of the simplest and most efficient exemplifcations of my invention, it should be understood that my invention is not limited thereto, but it may find expression in other forms of embodiment in accordance with and'within the scope of the appended claims.

1. Cooling body for foundry purposes, comprising a cross-sectionally ramified strip of sheet metal.

2. Cooling body for foundry purposes, comprising a. cross-sectionally ramiied and endwise pointed strip of sheet metal.

3. Cooling body for foundry purposes,

comprising a cross-sectionally ramified, edge- Wise curved, ramiiedstrip of sheet metal.

4. Cooling body for foundry purposes, comprising a. cross-sectionally ramifed and edgewise curved, endwise pointed strip of sheet metal.

-5. Cooling body for foundry purposes, comprising a. strip of sheet metal, and alternatingly and staggeringly disposed pro- `ecting flaps at the edges of the strip and bent out of its plane.

`6. Cooling body for foundry purposes, comprising a strip of sheet metal and alter` natingly, stepwise and staggeringly arranged sets of projecting aps of vdifferent lengths, bent out of the plane of the strip.

7. Cooling body for foundry purposes, comprising a strip of sheet metal, a plurality of stepwise and staggeringly edgewise arranged projecting iaps at the edges of the strip and alternatingly bent out of its plane,

substantially at right angle thereof.

8. Cooling body, comprising a strip of LUDWIG FBUS.