US1018090A - Apparatus for casting furnace-doors. - Google Patents

Description

J. B. WALKER. APPARATUS PoR cAsTING FUBNAGB moons..

ARPLIUATION FILED AUG. 1911. 4 l

Patented Feb., 20, 1912.. i

a salina-suffi.

A J5 J5 i "5* f jzz/zllie Maagd?) i r J. B. WALKER.

APPARATUS POE CASTING PURNAGE DOORS. APPLIOATION FILED AUG. 7l. 1911.

l? 73 I' J2 NM Patented Feb. 20, 1912.

s SHEETS-SHEET 2.

J. B. WALKER.' APPARATUS FOB CASTING FUBNACE DOORS. unmulou FILED AUG. "z, 1911.

1,018,090. vPatented Feb. 20,1912

3 SHEETS-SHEET 3.

JOHN B. WALKER, or ENSLEY, ALABAMA.

APPARATUS FOR CASTIG FUNAC-DOORS.

Specification of Letters Patent;

Patented Feb. 29, 1912i Application filed August 7, 1911. Serial Noi 642,634.

To all whom it may concern.'

Be it known that i, JOHN B. WALKER, a citizen ot' the United States, residing at Ensley, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Apparatus for Casting Furnace-Doors, of wnich the following is a specification.

My invention relates 'to a casting chill and has particular reference to a device of this character, adapted for use in cast-ing furnace doors.

lt will-be understood that open hearth furnaces are provided with a plurality of doors, usually four, tor the admission into thefurnace otl materials to be treated. These doors are usually mounted for vertical reciproeation and are. subjected to a very high degree of heat. I have therefore devised a form of door together with apparatus for casting the same, with the object in view of providing a door which shall be less subject to the action of the heat and which may be economicallyT produced.

A particular object of the invention is to provide apparatus by means of which bricks or other refractory material may be cast in and torni a substantially integral part of door of this character.` lt is contemplated that the bricks or other heat-resisting elements shall be arranged on the side next to the greatest heat. ln this way the destructi: action ot' the intense heat, due both to the disintegration of the metal and to racking caused by expansion and contraction is minimized.

My invention will be more readily understood by reference tov the accompanying drawings,wherein,

Figure 1 is a plan view of my novel apparatas.; 2 is a side elevation thereof', Fig. 3 a section on the line 3 3 ot Fig. 1, showing bricks in place and the apparatus ready for the pouring of the metal there-around; Fig. is a section on the samev line' as Fig. 3, a casting having been made and the bottom member of the chill allowed to descend away therefrom; Fig. 5 is a section on the line 5 5' of Fig. Q, and Fig. 6 is a modication wherein removable core members are employed in vthe place ot bricks.

Referring more particularly to the drawings, it will be seen that l provide a base member 10, having a trame work mounted thereon, this frame work including two ver- By reference. to Fig. l,

tical projections or supports 11. Mounted in bearings in the supports 11, are shafts 12, 12, having cams 13, 13 secured thereto. I provide means for rotating` the shafts and cams, such means in the present instance being vtoothed members 14, 14,engaging with worms 15, 15, mounted on a common shaft 16 and operable by means of a hand wheel 17. It will be noted thatthe worms 15 are right and left hand, inv order that the cams may move in opposite directions. understood also that I may prefer to provide power means for rotating the cams.

Mountedabove thevsupports is the chill, comprising bottom member 18 and top member 19.` A casting space 20, is provided be7 tween the members, the two members being held in proper :relation by means of dowels 21, and fastening means such as links and wedges 22, 23.

Mounted within the casting space and forming the be/'ttom wall thereof, l provide va floor coiiiposedlot ytwo members 24, 25, the member 25 having an opening therethrough in which is seated a round plug 26, composedl adapted to provide for the testing or sight hole through the door.

ing space 20, I provide ribs 27. These are provided in order to torni grooves 1n the casting, these grooves permitting expansion and contraction without cracking. As will be seen by reference to Fig. 1, these grooves lwill be preferably laid out in the form of a square but are not continuous, metal being lett between the ends of the adjacent grooves in order to provide a support for the metal in the center.

it will be seen also that l provide a groove 28m the top member 19, this groove being continuous from side to side of the member and extending part way through the thickness ot' the metal.` This provides for expansion and contractioiiot the top member and in order It Will be.

preferably of core material and Integral with theY top member 19 and projecting intothe castioo to prevent the possible separation ot the 'y member due to breakage at this point, links 29 and wedges 30 are employed. y i

ln operation the bottom member `is lifted by means of the cam members 13,'the top member 19 removed and a course of brick work 19a laid on the floor inembersll, 25:'

.floating of the brick when the metal is poured therein. The top member 19 is then placed and securely fastened by means of the links and fastening Wedges 22,' 23, the parts all being as represented in Fig. 3. Molten metal is Athen poured through the pouring gate and fills the'casting space and the interstices around the bricks. The casting being,r segmental in shape, it will be seen that after the metal is set, the bricks are securely held in place. Thereafter the cam shafts are rotated, thus allowing the bottom member 18 to descend. 24;, 25, and the superposed castin bricks are not permitted to descend With the bottom member but are held in elevated posi'tion by contact with the uprights 1l. Thus it Willbe seen that after the removal ot the fastening members 22, 23, and the shitting of the cams that the bottom member 18 will be removed from the casting and that With the removal oft the 'top member, the :furnace door is practically complete the only necessary additional Work being the` removal of the sprue. l

ln Fig. 6 l have shown a modification wherein bricks are-not employed as lining for the door. In this case l rovide cores 32, there being preferably tour thereof,

these core members when placed, ,iilling a space corresponding' to that which would be occupied by the bricks. lt will be seen,

however, that if a onepiece member vwere used,or1t no clearance were provided be v 1 tween the edges, that thecoi'e member could notibe removed. "Therefore Il rovi-de spaces between the adjoining edges o thecore members 32 and till this space ivi'tli\ saiicl, as

shown at 33.' By this means the corssinay be madeof metal and after the casting p eration readily removed.

lt Will be understoodthat many modifications, such as those'wliich may suggest themselves to those' skilled in the art, are contemplated by me and are Within the scope ot' my invention.' j. f lv l claim:

l. Apparatus for casting furnace doors, comprising, in combination, a support, a

chill on said support, said chill comprising' 'chill on saidsupport, said chill comprising top and bottom membersA having a castn in@ space therebetween, means tor remov The door members and y ably unitingl said top and bottom members, a Floor mounted in and vertically movable with relation to said bottom member, and cam means mounted in said support and adapted to permit said` bottom member to separate from a-,castiiigjI contained in said casting space, 'said shiftable iioor beireg, held `against downward movement by contact with a portion ot' said support, substantially as described.

3. Apparatus tor casting; comprising, in combination, a support having an upwardly projecting portion, a chill superposed above said support, chill comprising top and bottom members havM ing; a castingI space therebetvfe i, cam means mounted in s d support and adapted furnace dobrs,

to cause vertical reciprocation of portion.

of said chili, a iloor forming the loiveilivii of said casting space and means for shitting said. cam means whereby the bottom member of said chill is permitted to be loivcred away from a casting contained in said casting space, said tloor superposed cest-ing being held in elevated'positi contact with the projections on saidisi port, substantially as described i 4. illpparatus :to-i: casting; fui-ii doors, comprising', in combination, a iol a chill on said su ipoit, said chill com top and bottoni members having a casting space therel'iotween and said top niei'nber being provided with an expansion groove, means fior i'emm'ebiy uniting sad tcp and bottom meeibe a 'ioo'r nic d ver tically movable n i i bottoni member, said i boil tom wall of said icc and can;

ica

ing space therebetween and said top mein-I ber being provided with ribs projecting into said casting' space, .means tor removably uniting said top and bottom members, a ioor mounted in and vertically movable with relation to said bottom member, Isaid floor :forming the bottom wall of said casting space and cani members mounted on said support and arranged to permitthe bottom member of said chill to be moved downward and away ,from the casting1 contained" in said casting space, substantially as described,

6. Apparatus ifor casting furnace doors, comprising, in combina,tion,I a support, a

chill on said support, said chili comprising top and bottom members hai/'ing a casting space therebetween, means tor remova'b y uniting said top and bottom members, a member of said chill .to move downward I floor mounted in and vertically movable and away from the casting contained in said withl relation to said bottom member, chill casting space, substantially as desrbed.

members mounted on said floor and pro- JOHN B. WALKER. 5 vided with sand spaces between their ad- Witnesses:

jacent edges and @am means mounted in said C. F. BRYANT,

' support and arranged to permit the bottom P. V. Koma.

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