US1780787A - Ingot-stripping mechanism - Google Patents

Description

' Nov.4, 1930. .W. IID KELLER-ETI' L 1,780,787

INGOT' STRIPPING MECHANI SM Filed Sept. 4,1928 7 2 Sheets-Sheet 1 Nov. 4, 1930. w KELLER ET AL INC-0T STRIPPING MECHANISM Filed Sept. 4, 1928 2 Sheets-Sheet 2 INVENTOR Patented Nov. 4, 1930 UNITED STATES PATENT OFFICE WALTER D. KELLER AND WILLIAM L. roro, or ALLIANCE, OHIO, ASSIGNORS r THE ALLIANCE MAGHINECOMPANY, 0F ALLIANCE, OHIO, A CORPORATION OF OHIO INGOT-STRIPPING MECHANISM Application filed September 4, 1928. Serial No. 303,770.

Ingots are made of tapering form to facilitate the stripping thereof from the ingot mold. It was formerly universal practice to cast ingots with the small end up, but in recent years this practice has been reversed in 1 0 many plants, the ingots being cast with the large end up. The stripping means formerly employed cannot be used for stripping inverted type ingots as with this type it is necessary to hold the mold down and exert an upward pressure on the ingot by means of a ram.

The inverted type of ingot is usually cast with a mold having a hot top which when removed leaves a projecting portion of the ingot projecting above the top of the mold proper. This projecting portion is engaged by the tongs of the ingot crane. In a large number of cases the ingot lifts freely from the mold and need not be stripped. However, in regular operation there are always cases where stickers are encountered and the ingot must be stripped.

In practice, the projecting tops of the ingots are engaged by the tongs to determine whether or not the ingot needs to be stripped. If the ingot is loose in the mold the tongs are disengaged and the crane is moved to the next mold. It has heretofore been the practice to use a stationary stripper, and in case a sticker is encountered to pick up the ingot and the mold with the crane and carry it to the stripper. The stripping operation with such apparatus is unsatisfactory and inefiicient, due to the excessive amount of crane travel required to carry the ingots and molds to and from the stripper.

We provide a travelling stripper for inverted type ingots. Preferably an overhead crane bridge is employed, this bridge carrying an ingot crane and the stripper. The bridge runs in the direction of the tracks on which the ingot cars are handled, and it is a relatively I to test whether or not ping. When a sticker is encountered the Figure 1.'

- of the legs 15.

the ingots need stripcrane picks up the ingot and the mold and carries it to the stripper. The amount of movement is relatively small, being at the most the length of the bridge. The ingot 'is then'stripped and themold is returned to thecar. In the accompanyingfdrawings, illustrat-.

.ing the present preferred embodiment of our invention,

Figure 1 1s a side elevation of acraneand stripper constructed accordingtoour invention, and v Figure 2 is a vertical transverse section taken on the line II II of Figure 1. f

In the drawings there shown a series of tracks 2 for ingot cars 3 carryingingot molds l. The molds contain cast ingots and the hot tops have been removed, leaving a projecting portion 5. j

Overhead "crane tracks 6 are provided, these tracks extending in thesameidirection asthe'tlracks2. v A crane bridge 7 extends between the tracks 6. The bridge consists of spaced-girders'B connected at the ends by trucks 9 carrying track wheels 10 runningon the rails 6. The girders 8 carry rails 11 which support a trolley 12f movable longitudinally of p the bridge )7. The trolley 12 is of well known type embodying astiffleg '13 havingtongs at the bottom thereof.

Projecting downwardly from each girder 8 arespaced legs 15 connected by, structural bracing 16 on three sides to form a' rigid structure. The sideof this structure adjacent the tracks 2' is openso that'the downwardly V projecting portions on the trolley 12 can enter the structure as indicated in chain lines in Arstripper, indicated generally by the reference character17,iscarried at the bottom This stripper comprises a base 18 adapted to support an :ingotmold M and hooks l9 adapted to be swunginto position to engage ears 20 on the ingot mold ML Below' the support 18 is across frame 21 car prying a plunger 22. lVhen an ingot mold is simple matter to move the crane along placed on the support 18 and held down by the hooks 19,'upward movement of the cross 7 tom of the ingot, thus st'rippingit from the v ingot mold. This upward movement is ef-' 'fected' by cables 23 extending around sheave wheels 24 on the cross frame 21 and sheave I Wheels25 on the fixed structure carried by the legs15.1 One end of each cableis dead ended on the frame and the other end is wrapped on a winding drum 26' driven" through gearing 27 by a motor, not shown. When :asticker is encountered it is picked up by the tongs 14L and placed on the support .18 It is held down by the hooks1'9 and the cross frame 21 is then moved up- I bodied Within ingot. and its mold onto the stripper.

wardly to strip the 'ingot'from the mold;

After thestripping operation the mold, with the loosened ingot therein, is returnedto the I ingot carfand is ready to be taken'to the soak- I I sing pit crane. I y I .xoWe haveillustrated. and described the present preferred embodiment of our invention, but it will be understood that it is not limited to this form alone, but'may be otherwiseemthe scope of the following claims. p I

1. An overhead "travelling crane and a on the stripper an ingot to be stripped, and

a stripper carried by said members.

7:. Apparatus for stripping inverted type ingots, comprising an overhead traveling crane, and a stripper for inverted ingots movable therewith, the, crane being; adapted to handle a mold to or fromthe stripper.

8. Apparatus for stripping inverted type i g t-s, mprls g am ey m e- P per for inverted type ingots carriedfthereby,

and a crane trolley carried by the frame; and.

adapted to handle a mold to or from'the stripper.

u l a WALTER-YD. KELLER? stripper for inverted-type ingots carried I downward extension, .and a stripper. for inverted-type ingots carried on said extension,

the crane trolley :beingmovable into position I to deposit'an ingotanditsmdd on the stripper.

3'. I I a crane travelling longitudinally of the track,

and a stripper for inverted-typeingots movablewith 'thecrane, the stripper having a I portion which engages thebottom ofthe ingot for stripping it, thecrane being adapted Incombinlation with an ingot car track,

to transfer an ingot and its mold to the strip- P6 I I i i 4; ,An overhead travelling crane bridge, a

cranetrolley carried thereby,'and a stripper for inverted type ingots carried by the bridge, 7 thecrane trolley beingmovable into vertical alignment with the; stripper. I

5. Atravelling crane bridge, an open sided supporting structure carried thereby, :a stripper. for inverted type'ingots on said struc- I ture, and a crane trolley carried by the crane "bridge and movable to a point withinth'e open "sided structure.

6. Apparatusfor stripping inverted type ingots, comprising overhead spaced crane "girders, a trolley carried by the girders and I having ingot lifting means 'therebe'tween, jmembers extending downwardly from the ogirders, the, ingot lifting means being mov- I able between such members so as to deposit .I'1WILL A V OQTQ- 1;;

In testimony whereof We have hereunto set Mob

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