US2153464A - Supporting plate for chill molds - Google Patents

Description

April 4, 1939. HAAG 2,153,464

SUPPORTING PLATE FOR CHILL MOLDS Filed June 2, 1937 FIG. 3

J/mnneo' ffaay Afformya I Patented Apr. 4, 1939 i I 'UNITED STATES PATENT OFFICE I SUPPORTING PLATE FOR CHILL MOLDS Johannes Haag, Neunkirchen, District Saar, Germany Application June 2, 1937, Serial No. 146,048 In Germany December 10, 1936 6 Claims. (Cl. 22139) The object of this invention is .to provide a is provided with an aperture, directly into the supportin plate for chill molds, comprising a casting pit, but in any case will lead to very separate wear-resisting plate expo ed :to the acserious disadvantages, the. removal of which will tion of the jet of molten metal poured into the involve a gr a deal of W d heavy p mold. It has appeared hardly possible to prevent the 5 As is known, the consumption of the supportmolten metal from breaking through in this way, ing plates in casting ingots in chill molds has 9. since the degr of couring in the wear Plate considerable influence upon the economy of metal can hardly be ascertained at all, or at least only manufacture, more particularly in the producwith great difliculty. If it is desired to obviate tion of steel. Many suggestions have therefore such failures thoroughly by renewing the wear 10 already been made with a view to diminishing the plates at the right time, this merely means that consumption of supporting plates. the wear plates must be replaced by fresh ones A very useful known supporting plate contoo soon, and consequently at least a portion of sists of individual parts, one of which serves as the advantage of such composite supporting a wear-resisting plate, which is exposed to the p ate is Wasted- 16 direct action of the jet of molten metal, and is Now the object of the present invention 18 t0 therefore subjected to the maximum wear. provide a simple means for fundamentally pre- When the wear has reached a definite stage, only venting the metal from breaking through, withthis portion of the supporting plate, which may out involving an unduly heavy pt o of 20 be referred to as a wear plate, is then exchanged, supporting plates. This aim is attained by pro- 20 while the other parts of the supporting plate may viding, between the wear plate and the base remain in use for almost an unlimited time. plate, an intermediate space filled with fire-proof Now it has been found that even this composite material.

supporting plate also exhibits disadvantages, Further advantages and further features of which are illustrated in the accompanyingdiathe invention will be gathered from the ensuing 25 grammatic drawing, in which description, in which one example of theinven- Flgure 1 is a top plan view of a wear resisting tion will be described with reference to Figures plate of my invention. 3 and 4 of the accompanying drawing, in which Figure 1A is an elevation in section of the plate Figure 3 is a plan of a supporting plate acof ure 1. cording to the invention, with thechill mold in 30 Figure 2 is a top plan view of the plate of Figsection on the left-hand side and with the chill ure '1 after it has become worn through use. mold removed on the right-hand side, and

Figure 2A is an elevation in section of the plate Figure 4 shows the same in sectional elevation. 0f Figure 2. A composite supporting plate comprises an Figure 3 is a top plan view partly in section actual base plate 5. This is provided, at the 35 illustrating a mold and a wear resisting plate places where a chill mold 6 is to be mounted uppositioned on a support frame. I v on it, with a raised portion 1, having a circular Figure 4 is a side elevation in section of the recess 8 in the centre. Upon the projecting rim apparatus of Figure 3. 1 fits an actual wear-resisting plate 9, which has 0 The plate I has on its under side a projection a projection II on its under side, which is like- 40 th main P p Of hi h s to increase the wise of circular form and fits into the recess 8 cross-sectional of the Plate r th P in the base plate 5. The external surface I! of pose of ensuring It a 9 In Figure 1 the projection I on the base plate 5 is conical is diagrammatically indlcated hollow 3 in the in shape, and is continuous withthe external t ifinifg foltit sifitifittfitoii tft of 9 which is likewise this hollow will become progressively larger and comcal' The base plate 5 and the fz' 2?: larger, and will finally reach the form shown at 9 are i g i by a a fragile w v l in figure The last casting obtained with is provided with internally, conical side walls I5,

this wear plate will indeed still be successful, the mchnatmn of which corresponds to the 50 but if it is used again the next jet 'of molten of the surfaces and Upon the meta] will break through th weakest point, 5 of surface the frame It is provided with cam-like the plate, so that the molten metal will now esp j i |6..Wh10h enable h 0.11111 mold 5 t0 cape underneath the wear plate. It will then be accurately centered when lowered from above pass either on to the base plate, or, if the latter, by a crane on to the wear plate 9. For this 55 purpose the internal surfaces ll of the cams it are bevelled.

The supporting plate, consisting in all of three parts, namely the base plate, the wear plate and the frame, may also be held together by a wedge or key connection. For this purpose there is provided laterally in the frame II a recess it, which registers with a similar recess located beneath it in the base plate 5. In this recess is inserted a bolt or pin i9, which has a lateral aperture, through which a key or wedgejl can be Between the downward projection ii of the wearplateandthe oppositesuri'aceof thebase plate 5 there is provided according to the invention in the cavity I a free space, which is filled with fire-proof material. When, with such a supporting plate, the wear plate is scoured away as m as is indicated in Figure 2, the next castin does not cause the metal to break throug since the fire-proof material which is a poor conductor of heat, opposes the passage of the molten metal in the chill mold until it has solidified. After removal of the chill mold filled with the ingot, the workmen can now see, as soon as the fireproof material is uncovered, that the wear plate requires to be renewed. A

The emp oyment of this invention in practice has shown a substantial improvement in the consumption of supporting plates as compared with even the best of the supporting plates hitherto adop What I claim is:

1. Apparatus for use in casting ingots comprising an ingot mold open at. its lower end and a stool upon which said mold is supported, said stool comprising a base plate having a raised formation defining a recess at its'upper surface, a wear resisting plate having an integral projection on its bottom surface cooperating with said base plate surface recess to removably seat said wear resisting plate upon said base plate and means for securing said wear resisting plate upon said base plate, said securing means cooperating with said wear resisting plate to support said ingot mold.

' 2. Apparatus for use in casting ingots comprising an ingot mold open at its lower end and a stool upon which said mold is seated, said stool comprising a base plate having a recess formation at its upper surface, a wear resisting plate having a downwardly projecting portion extending partly within said recess, means for fastening said wear resisting plate to said base plate and and a layer of re-enforcing material which is a poor conductor of heat between the projection and the bottom of said recess.

3. Apparatus of the type defined in claim 2 for use in casting ingots wherein said re-enforcing layer is of refractory material.

4'. An apparatus for use in casting ingots com prising an ingot mold open at its lower end and a stool on which said mold is seated, said stool comprising a base plate, an annular projection at the upper surface of said plate having a. vertically extending inner wall and a tapering outer wall, a removable wear resisting plate resting on the upper surface of said annular projection and provided with a downwardly extending projection in theform of a disc, the portion of said wear resisting plate resting on said annular projection having an outer wall inclined at the same angle as said tapering outer wall of said annular projection, and a ring having a tapering wall fitting said tapering walls of said annular projection and said wear resisting plate.

5. An apparatus for use in casting ingots comprising an ingot mold open at its lower end and a stool on which said mold is seated. said stool comprising a base plate, an annular projection at the upper surface of said plate having a vertically extending inner wall and an upwardly tapering outer wall, a removable wear resisting plate resting on the upper surface of said annular projection, said wear resisting plate being provided with a downwardly extending projection in the form of a disc, the thickness of which is less than the height of said annular projection to form a space between the bottom surrounded by said annular projection and the lower surface of said downwardly extending projection of said wear resisting plate, and refractory material filled in said space, the portion of said wear resisting plate resting on said annular projection having an upwardly tapering outer wall corresponding to the upwardly tapering outer wall of said annular projection, and a ring, having a downwardly tapering wall fitting said upwardly tapering walls of said annular projection and said wear resisting plate.

6. An apparatus for use in casting ingots comprising an ingot mold open at its lower end and a stool on which said mold is seated, said stool comprising a base plate, an annular projection at the upper surface of said plate having a vertically extending inner wall and an upwardly tapering outer wall, a removable wear resisting plate resting on upper surface of said annular projection, said wear resisting plate-beingprovided with a downwardly extending projection in the form of a disc, the thickness of which is less than the height of said annular projection, to form a space between the bottom surrounded by said annular projection and the lower surface of said downwardly extending projection of said wear resisting plate, refractory material in said space, the portion of said wear resisting plate resting on said annular projection having an upwardly tapering outer wall corresponding to the upwardly tapering outer wall of said annular projection, a ring having a downwardly tapering wall fitting said upwardly tapering walls of said annular projection and said wear resisting plate, and cam-like projections on said ring adapted to cooperate with the upwardly tapering outer surface of said mold to guide the latter into its correct position when said mold is beinglowered on to the supporting stool.

JOHANNES HAAG.

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