US1438271A

US1438271A - Process and apparatus for casting bosh plates

Info

Publication number: US1438271A
Application number: US340335A
Authority: US
Inventors: Smith James
Original assignee: NEW PROCESS COPPER CASTINGS CO
Current assignee: NEW PROCESS COPPER CASTINGS Co
Priority date: 1919-11-24
Filing date: 1919-11-24
Publication date: 1922-12-12
Anticipated expiration: 1939-12-12

Description

vJ. SMITH. PROCESSYAND APPARATUS FOR CASTING BOSH PLATES. APPLICATION FILED Nov.2`4. |919.

Patented De@.12,1922,

2 SHEETS-SHEET l.'

...Oi n.

. '1. SMITH. PROCESS AND APPARATUS FOR CASTING BOSH PLATES.

. APPLICATION FILED NOV. 24. 19l9.

1,433,271, Patented 120.121.922.

l J f 1 /x///// //I/'/////////// www 2 17 Tn l/enlor Patented Dec. l2, i922.

JAMES srrrrr, or CHICAGO, nnrivosvnssioiioia oirn'fa cAsTiivG-s COMPANY, A ooaronn'rfonor -DELAWAtn' rnoonss AND APPARATUS Foie loAsTfit visn 'rrjliir'iifs'Q Application led Noveiriher', ySriziil'o. 540,335;

To all whom t may concern: g

Be it known that LJAMLsSiiiITH, a citizen ofthe United States, andresiding in the city of Chicago, county of Cook, andState of Illinois, have invented or discovered new and useful improvements in Processesand Apparatus for Casting Bosh Plates, of which the following is a specification.

My invention, consists in a new and improved process and apparatus of casting vbosh plates for furnaces, and said process more particularly consists in 'casting said plates in a vertical position, the sand corek being supported, on an integral sand base, within the sand mold, whereby the use of anchors or other supports or reinforcement forthe core is avoided.

Bosh platesl are now cast horizontally, 'and therefore the core must be snpp'orted'wit'hin the sand mold by means of metal anchors which remain embedded in the casting'and weaken the saine. i introduced into the sand mold to strengthen it and prevent buckling duringthe casting operation. These wires are withdrawn. after i the metal has been poured, leaving holes in the internal baffles which disturb thel water currents and therefore impair the efficiency of the bosh plates. l also show new and useful improvements in the patterns used for moulding in my im-H proved process. y

Other novel features of construction and arrangement of partsl will appear from the following description. I

In the accompanying drawings, which are merely intended to illustrate the principlesy of my invention without limiting the scope of the same, Fig. l is a .vertical section, takenalong the line -I in Fig. 2, showing the? sand mold and coreassembled in thefi'asl ready for the pouring; Fig. 2 is a section taken along the-line lI-l in Fig. 1; Fig. 3 is a perspective of a type of bosh plat'eica'st by my improved method; Fig. 4E is a sectiontaken along the line .IV- IV in Fig.` 5,-

showng the flask assembled, ready to first form the nose of the sand mold and'later the body of the saine; Fie. 5 is asimilar view taken along the line -V in Fig. el; Fig. 6 is a plan view of the combined core box and base box, showing the sand filled therein, the top wall of the base box` being removed to more clearly showv the structure; Fig. 7 is a longitudinal section takenalong Furthermore wires are the bosh of the'Y furnacef' talshowiiig tlielginner'oriiipper facie ofthe sand base yai'id the gateffo'rniedftherein to co'niietJtheSfprne with the' 11i-toldy cavity for the [admission of the' metal; Fig. 9.i's a front used `to form.-the in'old.cavity for the vfront wall of thelbosh :plate Fig. l0 is an end view of one vof, the split sand molds-.for the handles, and Fig. vll'is an 'inner face View of* my process as the same'is 'illustrated ijn' the accompanying drawingsg, reference being rsthad to Figs. 11,2 and `3. .Y T4 e asks co p l seclfof a drag A, a cheek Bl mounted on 'said drag,V and` a,co'p C mou'nt'edon said cheek.V The-'elements are ldetachably .clamped together ybymejans of their pierced-.ears` ll and bolts The drag A ifs provided withsupporting vfeetf and slots or aperturesgn `its bottom for. .the escape of .gases from: the' molten vmetal.

6ol yView of the wooden pattern `plate which 'is `The sand-mold, which determines the outi.

side contourioflthfexbosh plate iscoinposed of two parts, the body part-.Dand .theno'se part D. ,F The Vbody D formed inthe cheek B and extends tithetop' ofv the same,y while the nose' Df: is formed in' the` cope;- E is the sand core which is insertednp into thel sand mold`- vDeli-D", and F 'isthe sand' base which occupiesV the drag A and is integrally .connectedto thefcorelu'. V .i p

The forifiiof the bos'l'i plateG, which is shown in Fig'. 3;;y is shown simply as an illustration, as any character ofboshplate Vmayfbe; cast .bygmy .proc'e'sst` y,The interior 9arey fitting in the ydrag A upon which islmounted the wooden core pattern 111- whose foot may bestepped in a Ysocket in said blockl-O. T he other end' or nose' ofsaidpattern is separate,l being a nose piece, 12 which' may be connected to: the body pattern'` 1'1 by means of dowelsfl. l

14 is the wooden sprue pattern whose end is stepped in a socket in the block 10. .The pattern 14C extends a little above the top of the cope C, and the top or' the pattern 11 is level with the top orp the cheek B. I first insert the` block 10 into the drag, and then mount thereon the patterns 11 and 14. llhe cheek B is then put down in place and bolted to the drag. A. steel` plate H is then placed over the top of the cheek, said plate being properly apertured to permit the upward extension ot the dowels 13 and the-sprue pattern 14C. Said plate is also provided with holes `which register with the holes in top ears 1 of the cheek. The cope is now put in place and bolted to the plat'e H and the cheek. The nose pattern 12 is now placed on the .plate H in registration with the pattern 11 with which it is connected by the dowels 13 extending up through the plate H.

,The molders sand is now introduced into the cope C, the curved riser patterns 15 being installed to form the riser passages in the sand mold. The cope is now rammed, or jarred by placing the flask on a machine. The top bolts 2 are-now removed and the plate l-l withthe cope and its contents lit-ted ott', the pattern 14, which remains with the cheek and drag, leaving a vertical hole in the nose 4mold forming the upper part ot the sprue. The nose mold thus formed is set aside to harden. The molders sand is now filled into the cheek about the Asprue and core pattern and the laslr is rammed or jarred. rlhe cheek is then detached from the drag and lifted ott' and set aside.

TvWhen the sand mold parts in the cope and cheek are hardened7 the wooden pat terns are removed.

My reason for forming the sand mold in two parts is that by this means l am able to more properly compact the sand, as the attempt to compact the sand mold in one piece and operation would result in irregular density and adhesion.

l, will next describe the formation of the sand core E and its supporting` base F. For this purpose l use a wooden core box ll and integral therewith a wooden basebox el.

The core box is of the following construction. lts top is open while its bottom 16 is curved to give the desired contour to the core. The inner end and sides of the core are deiined by the

permanent Walls

17 and 18, respectively, thel outer ends of the walls 18 being connected by the detachable pattern plate 19 which denes the iront of the core and which 4isy mounted in place by means of dowels engaging the bottom 1G. Said plate 19 is provided 'with three transverse ports or openings 20 which correspond to the ports 6, 7 and 8 in the trent of the bosh plate. To enable the plate 19 to be lifted away from the linished sand core ings of wooden insert blocks 21 held in place v by dowels 22, which blocks can be removed before the plate 19 is' lifted out. l

The internal baiiles orl partitions 5 ot' the plate are provided tor in the sand core by means of wooden strips 23 temporarily mounted on the bottom 16 by means of dowels.

rlhe base F is formed in the box J, which may conveniently be attached to or formed as an extension oit the'box l. T he box J extends above and below the level oiE the box l to provide the proper width for the'base which its the drag A. Said box has a permanent front wall. 9A, and top and bottom walls 25, the former being removable to permit ot the discharge oit the base from the box. 2G represents side boards which hold the sand during the compacting operation. rlhe top wall 25 and the adjacent side board 26 are removed when the core and base are to be removed from the boxes l and J.

The molders sand is filled into the boxes l Also wooden prints are also placed againstv the front ofthe plate 19 to form the gate passages 8, Fig. 8, which connect the mold i and J, the top of the box l being struck cavity with the lower endY of the pouring sprue formed by the pattern 111.

After the boxes l and J are lled, the sand is compacted by ramming or jarring and. the boxes are then turned upside down to discharge thev integral sand core and sand base upon a metal plate. The wooden pattern members are now lifted out and the core and base are baked.

l also term in suitable patterns split sand molds 29 which contain between their halves the U-shape passages 30 which form` 'the handles 9, as shown inl Figs.l 10 and 11. These molds are inserted in the apertures of the base F which were termed by the wood en blocks 27, `with the open ends ot the lll-shape passages joining the print lett by the plate 19. l prefer to malte such split molds narrower than said apertures, so that small spacer blocks 31 oiI sand may be'used to shift the position of the handle molds, as may be desired in the particular furnace practice.

llllhen tlie various parts are ready l mount the sand core l@ upon the drag A. by step ping the base F in said drag. l then pnt the. portion D of the sand mold, contained nis-saar in the' cheek TB down over thel core and bolt'the cheekto the drag-'thelovver end 'of the spru'e` registering `vvith`the gate 28,' I

then place the sand' nose mold D dovinover the upper end 'of the core E and bolt the copek C'to tliejcheek B. v v, l

rifhe ila'sk is now assembled fory pouring,-

and y.the 4metal, isintroduced 4 d ovvnvvardly through the sprue and rises vyithin the mold Auntil the'saine is illed las will `be indicated bythe riserpassages'.k

Vfhe'n the-"metal is set and sui'lic-iently cooled, the bolts'Q are removed and the cope from 'the drag, exposing the y and cheek lifted castboshiplate, which is ythen removed, the

sand knocked out of its interior? and, the gate and risers ground oft. The ports' 6,

.geneous anchors embedded therein and no Wire holes in the vvater baffles or'internal artitions.

Although, for the sake of clearness of description, l have minutely described Vthe drawings, do not Wish to limit myself thereby, but claim broadly: .l

l. ln a mold for casting furnace bosh plates in a vertically disposed position, the combination of a flask, a sand base contained in said iiask, asand core supported by` and in spaced relation above said sand base by means of sand necks integral With both said' sand base and sand core and Which necks form the Water ports in the front Wall ot the iinishel bosh plate, surrounding and enclosing said sand core and resting on said base, said sand mold being made separate from said sand base and sand core, as and for the purpose described.

2. in a mold for casting furnace bosh plates in'a vertically disposed position, the combination of a flask, a sand base contained in the drag of said flask, a sand core supported by and in spaced relation above lsaid sand base by means of sand necks integral with both said sand base and sand core and which necks form the Water ports in the front Wall of the finished bosh plate, and a sand mold surrounding and enclosing said sand core and resting onsaid base, said sand mold being formed separately from said sand base and sand core, and said sand'` mold beingprcvided vvitli a vertical sprue Whose lower end is connected to the space vbetween said sand base and sand core, as and for the purpose described.

3. in a mold for casting` furnace bosh plates 'in a vertical disposed position, in

vvfhzhjbothsaid sand base and and a sand mold coinloinationy lwith 5 a' iaskj comprised oir' a3 drag', a cheek" alnd cope, asand `base itting in said drag,

ported by 'and sand base -b'y' means of sand' necks integral sandycore and Which-nec`ks form "the Water `port-sin the in-iontwvall oithe inished bosh"plate, a tvJo-'v part sandmold ysurrounding` and enclosing'. said core and restii'ig `on saidbase, said sand `mold being"comprised"lotA a body portion contained infltl'ie; cheek and a --separately formedl noseA portion contained in the'cope,`- and aspruefi'or y to' thel interior cavity lovl-'said 'sand 'mold, asa'nd for the purpose, described.

a. In amoldor casting furnace bosh afsan'd core L*vertically supi in spaced reiation above said,`

the admission ofthe metal"y i pla-tjes ina vertical disposed posit-ion", c'oni- 5 y cheek 'and'a'vcope,` a "saiid'base fitting in said drag, a sand core verticallyfsupported by and-in spaced relation above said sand'base by means oi sand necks integral With bothl bi'iiationwithaiiask ,comprising ya drag, a'

said `'sand base andv sandv core and Which necks-:torni the Water portsin the Ifront vvall of the finished bosh plate, and `a two-part sandy mold surrounding and enclosing said sand core an'dresting on said base,.said sand f a i y,mold being` comprised of a body portion embodiment of my invention shown in the containedinthe cheek vand a nose` portion contained in the cope, andr said two-part sand mold beingy provided with a vertical tions for the purposes described which consists in mounting' a two part corepattern upon a support.inclosing` the lovver` portion of said pattern in a vertically disposed cheek, placing a plate over the top of said checlnfpositioning vthe lnose portion of said `pattern on said plate andsurrounding the saine kWith a cope, filling; said cope With sand, and compacting the saine; then're moving said plate and cope and its contents ioo iet

and filling the cheek Withsand and compact- 'i ing the'same. i f

6. The method of forming a'sand mold in two parts by separate compactinp, operations for thev purposes described which conupper` end of said sprue pattern on said plate, iillinsaid cope With sand andcompactinggv it, lifting said plateand cope With its contents offl ot said cheek, filling said iis `sists in` mounting a tvvopart corepatternf iso cheek with sand and compacting the same. 7. In a mold for casting furnace bosh plates lin a vertically disposed position, thecombination of a flask, a sand baseY contained in said flask, a sand core supported by and in spaced relation above said sand base whereby a space is provided for the ent-rance of v`metal between 'the sand base and the sand core toform the front wall of the bosh platen spaced apart supports extending upp wardly from said sand core to said sand base, said-supports forming `the cores for the Water passages through the front Wall of the bosh plate, and asand mold surround `ing and enclosing` but out of contact with said sand core and resting on said sand base, as and for the purpose described.

8. ln a mold for casting furnace bosh plates in a vertically disposed position, the combination of a flask, a sandbase contained fea s p 1,438,271

in said flask, a .sand core supported by and in spaced relation above said sand base whereby a space is provided for the entrance of'r metal between the sand base and the l sand core toy form the front wall of the bosh4 plate, spaced apart supports extending upwardly from said sand core to said sand base, said supports formingthe cores for and the sand core, as and for the purposeA described.

Signed at Pittsburgh, Pa.,`this 3rd day l of November, 1919. f

- v JAMES SMTIH..V