US911372A - Mold for closed cylinders. - Google Patents

Description

' H. BRINKERL MOLD PQR .CLOSED UYLINDERS. APPLIOA'TIQN H-LBD JULY 11, reos. 4

911,372. f Patented Feb.2,19o9.

2 SHEETS-SHEET 1.

Inventor L?, Attorney Y H. BRINKBR.. MOLD FOR CLOSED GYLINDERS.

APPLICATION FILED JULY 11, 190s.

911,372. -1 Patented Peb.2,1909.

2 SHEETS-SHEET 2.

" Wifnesses: U .Inventor articularly to HERMANN BRINKER, or HAMILTON, OHIO.

`MOLD FOR CLOSED CYLINDERS.

p vSpecification of Letters Patent.

Patented Feb. 2, '1909.

Application filed July 11, 1908. Serial No. 443,155,

To all whom' it may concern:

In the drawings, referring for the present Be it known that I, HERMANN BRINKER, a I only to Figs. 2 and 3 :-1, indicates a seamless citizen Vof the United States, residing at Hamilton, Butler county, 1Ohio, have invented certain new and useful Improvements in Molds for Closed Cylinders, of which the following is aspecification.

There is a class of rotary metallic drying cylinders employed` in drying webs, as, for instance, in t e driers 'connected with paper making machines. @While many driers of this class areformed withl a shell having its heads separablyattached, there is a type known as seamless driers in which the entire cylinder, including the shell and its heads, is cast. in one piece. The molds for producing these one-piece dricrs arebuilt up, and the core is supported by feet at its bottom. While the molds usually yemployed for the` production of these one-piece driers .have been fairly satisfactory for ordinary lengths of driers there has still been a very serious loss of castings. In the modern develo ments of the paper making 'machinev art t e machines have been very much widened and the drying cylinders have been correspondingly lengthened, driers eight or more feet long not being uncommon. As these diiers are subjected to internal pressure an apparently trilling lateral shifting of the core may be serious or even fatal`to the utility of the very costly casting, and the core employed in the longdriers, as ordina-` rily produced, is especially-liable to trans-v verse shifting at its top,v V

My present invention is Vdesigned vto generally improve the molds employed in the production of these seamless driers, and guard against the usual ateral shifting of theA top of the core. p

My present invention will be readily understood from the following description 'taken in connection with the accompanying drawings in whichxl Figure 1 is a vertical longitudinal section of', atmold embodying my inventioni Fig. 2

anelevation, part vertical longitudinal section, of a typical drier to lie produced in the I mold: Fig. 3 an end elevation of that end of the drier corresponding with the lower end of the mold: Fig. 4 a plan of one of the segments of thecore-barrel: Fig` 5a plan* of one of the core-grids: and Fig. 6 an Aelevation of one of the core -base tubes. Figs. 2, 3, 4 and are on a smaller scale than the res maining figures.

drier, with its shell, heads, 'and journals cas-t in one piece: 2, a pair of hand-holes in, one head of the drier: 3, a third hand-hole in the saine head of the drier: and 4, a hole in the head op osite the one containing the handholes. lhat head of the drier provided with hand-holes 2 and 3 is the one to be downward when the drier is cast, .and there are to be not less than three of the hand-holes in this lower end. My preference is'to employ a plurality of circular hand-holes in conjunction with one elliptical hand-hole. Circular hand-holes and hand-hole plates are preferable to elliptical ones but circular handholes have the disadvantage of not being able to admit their-own plates. In the preferable example referred to the plates for the` circular hand-holes may be assed through the elliptical handholes, an the elliptical hand-'hole will ermit its own plate to enter. The hole 4 in that head of the drier o posite the'one provided with hand-holes is fbr production urposcs only and is tov be plugged, preferably flush, before the drier is put into use. I will now describe my improved mold in the production of these driers.

Proceeding with the drawings, and particularly Fig. 1 :5, indicates the mold-space for the lower head of the drier: (5, the moldspace for the upper head: 7, the mold-space for the shell: 8, the location in the molds ace for the ulpper head corresponding with that of the ho e 4 in the upper head of the drier: 9, the Llocationin the mold-space of the lower head corresponding with one ofthe hand-holes inthe lower head of the drier: 10, the betteln-board of the mold: 11 to 17, inclusive, the vertical series of flasks resting upon the bottom-board, this series of flasks to vary in number and total height according to the height of drier to be produced, and the individual flasks to be firmly clamped jto gether as usual: 18, the lowermost mold section, or drag: 19, the lowermost core section:

,'20, the top core section: 21, they top moldsection: 22, the basin section, sections 18 to 22 Iinclusive being preferably of. core sand vand baked: 23, the pouring basin inthe to of the basin section: 24, the' gates leading om the basin section tothe mold space: 25,. the

drier shell mold sand between rinold sections v18 and 2,1, this sand being, preferably,

rammed upon a' shell draw-pattern: and 26, the drier shell core sand between sections 19 and 20, this sand being also preferably v rammed u v All of tll) may be, substantially as usual and produced' in the usual manner in the making of seam-A inthe draw-pattern for `the shell. e parts thus tar described eraser less driers. y

AProceeding with the drawings:*27, indicates core-barrel segments joining into the lrcles arranged in vertical series, the lowerf i/o4 y per edges of the segmentsl being rabbeted to most one resting on core-section 19, the up- ,rec eive Athe lower edges of .the superposed segments: 28, ports in the lower edges of the segments, the Walls' of. these ports flaring y'outvi/ardly' in :such manner that the sand Which enters them inthe course of ramming 'core portion26 Will choke Within' them instead ofy passing Afreely and'wastefully into --fthe' interior of the 'core-barrel: 29, vertical -gr'idincorporated Within'core-'section '19 and -dovetail fribs on the exterior Vof thel corebarrel segments: 30,- a horizontal skeleton serving to'stren'gthen that corel section to facilitate itsbeing handled: 31, eyes formed in :grid 30, .onejeye corres Yending with 'the position of each-'l ofv the and-holesto be,

ormed in thelo'wer head ofthe drier: 32, a skeleton grid, similar to grid 30, and nicerporated in top core section20: :33, segments orming a ring. embedded in the. upper surfaoeof corebase 19, rthese segments bein provided With holes in line with each of th eyes ingrid 30.: 34, similar'segments'forming aring embedded in the lower faceot the 'cogeseetion 20: 35, vertical` tubesembedded core-'base 18 and resting on bottom-board' v20, there being one of thesetu-be's under each y .Y of thefeyes 31m grid 30,' corresponding with the `osition ofthe handholesin 'the-lower hea of the drier: 36, ktubes embedded` in core-base 19,"their' lower ends resting on tiibes`;35jr and their ug'ip'er 'ends being enedf'witlij upwardly Vprojectin01 Ashou ders, the portionsloi the tubesfaboveth engaging the-ees P11-ofrid 8U," :which grid gagged by-segments 33,'.thev`setubes bein' proj` 1 restsdownwar yupon t e's houlders ofthe hand-holes inthe lower head of the drier; 3 8," vertical'tnbes embedded in coresection 20,- and extending fronti,segments3st` u to near thetop ofthatfcoresection, there'fe'ing-one' of. these tubes inline witheachjoi 4the tubes l the core-barrel Iand resting on segments 33,

tubes 3 7, vcollie-bosses 'surrounding 'thelower section 18 and ,forming 'the coresf for the 365439, vertical couplings disposed :Within one 'coupling over each of the tubes 36: di), a bolt, preferably tubular, -extending from 'below the bottom-board up through tubes 35 and 36 andin to its appropriate:coupling:`

v 41, a tapering key in the lower endof eacliof;

the bolts 40`belew the bottom-board: 42, a

separable key. uniting each bolt 40 with its appropriate coupling 39z- 13,v tee-slots in the e shoulders upper ends of the couplings 39: 14, bolts cxtending down through t 1e tubes 38 and havingtheir heads hooked into the teeslots of the couplings: 45, nuts on the upper ends of the bolts 4, these nuts being disposedin recesses in the upper surface of core-section 20: 46, sand filling these recesses over these nuts: 47, a vertical tube embedded `in coresection 20 and having a converging upier end engaging a converging socket formed in the base of mold-section 21, this tube being in the position corresponding With hole i in the upper end of the drier, which position is, however, rather immaterial in View of the fact that the hole is to be finally aban(l )ned when plugged: 48, a vertical tube projecting freely t n'ough basin section 22 and havin y its lower en( engagino` the upper end of tube 47 49, sand tig-htl` packed in the.

50, journal-core for the upper journal of the drier, such core to be employed only in case it is desired to lighten or to have a hole entirely through the upper journal: and 51, the

preferably tubular and extending 'through the lower journal-space of the mold and lthrough core-base 19 and into the interior Ofthe core.

As the uniformity' of the thickness of the shell'of the core depends not onl on the accuracy oi 'the formation of the n1old-parts but also upon lthe accuracy of their position- With reference to each other, 4it is desirab ethat the upper face of the bottoni board and both ends oitubes 35, and at 'least the lower ends of tuhes should be 'accurately machined.. y The forming of basin section 22 separate from the upper inoldseetion 21l is desirable but not essential. lho 'inoldbase 18, the corediase it), the core top 20, the upperinold section 21, and the basin section 22, are to be producedin the usual I'nanner ready for usc with their metal parte embedded in them.

Owing tothe small quantity of sand in the mcore-bosses 37 surrounding the lower ends el tubes 36, the accurate positioning of these tubes lisa matter ot very` considerable iinportanee in forming the core-base. VTho Yeyes l-carried by grid serve in accurately positioning these tubes. lf the grid, in being placed' in the sand while the core is being termed', is allowed to tip out of parallelism 'with the face of the core thon-'the eyes and 'tubes become malpositioned, the tubes being at Wrong distances from the center o1" the coro and vbecoming tipped at angles to' the 'ria of the core. The resting of thoeyos of the grid upon the shoulders oi the tube insuresr accuracy in' all respects. j

lllask v11 with its contained mold-base 18 when com leted is .to beset upon the bottom* board'.

place with the basesof its tubes resting or opening oi. basin section 22 around tube 18:

l. (l il orc-hoard 19 is then-tobe set in isa i 4 and bolts 40 connected with them and desired length of the drier.

tubes 35. Couplings 39 are then to be laced V eyed up whereby the corebase becomes accurately positioned with reference to the mold-base and rigidly locked to it, The core-barrel may then be built upto some extent and, in

connection with the usual draw pattern, the' sand around the core-barrel may be rammed, and also the exteriorsand for the shell, flask sections being added, and the. coresbarrel built up to such extent as is called for by the Core-top 2() is then placed in position and the bolts 40applied. in an obvious manner and tightened, thus completing the core and binding it firmly' to the bottom-board, after which the sand 46 is .filled in over the nuts on the rods. Mold-top 2l is,l then to be placed in position,

the upper end of tube, 47 serving to position 20` Y ence to the general mold, it being understood 'that the 'flask sections are clamped together 1in the usualy manner.- .then placed, after which tube 48 is placed in and substantially stay the core-With'refer- Basin section 22 is position and sand 49 rammed around it and serving to lock tube 47 firmly and solidly to the mold even if the upper end of tube- 47 does not snugly'fit the recess in mold-top 21. It will be observed that the upper end of the core is firmly held so Ithat when the metal is poured it is not liable to shift laterally.

By removing-keys 41 all of the exterior mold-parts can be removed and the drier casting shaken out. The downwardly proj ecting ends of tubes 36 are flattened, as seen` 1 in Fig. 6, thus permitting the application of a wrench to the outer ends of these tubes,

wherebyl they may be twisted loose in the core-base and withdrawnl through the hand holes through which they project. Thecore-base and its Grid 30 may then be broken up by means ofD suitable tools employed through the hand-holes and the core-base and grid fragments and .segments 33 rel moved through the hand-holes. The coupe ling may then be readily disengaged from the heads of bolts 44 and withdrawn through the hand-holes, after which the segments of the core-barrel may be separated and withand to facilitate this it should b'e well drawn. Core-top 20 and its grid 32 may then be broken up and withdrawn, along with segments 30 and bolts 44 and tubes 38. Tube 47 is then `to be removed outwardly,

sup-

plied with core wash or black lead or a suite able Wrapping as of asbestos paper. The.

casting has now been cleaned up without and within and the hole left by tube 47 shouldvbe tapped and plugged.

l. 'A mold comprising a cylindrical corebarrel formed of segments `provided on their outer surfaces with vertical dovetail ribs and on their lower edgeswith ports and having their upper edges rabbeted to receive the lower edges of the superposed segments, substantially as set fort i.

, 2. A mold comprising a cylindrical corebarrel .formed of segments provided on their outer surfaces with vertical dovetail ribs and on their lower edges with erts having outwardly diver ing walls andphavingptheir upper edges rab etedto receive the lower edges of the superposed segments, substantially as set forth.

3. A mold comprising, a mold-base, a corel bolted downwardly upon the core-base, a shell mold-portion resting upon the mold-base and surrounding the core, a mold-top section above the core, and a vertical metallic tube embedded in the top of the core to one side of the axis of the core and having a converging section,v and serving to prevent the core from shifting laterally in the mold, combined substantially as set forth.

4. A mold com rising, a 1noldbase, a core bolted downwar ly upon the core-base, a shell mold-portion resting upon the moldbase and surrounding the core, a mold-to section above the core; a first vertical dowe ing element embedded in the top of the core and rojecting u into the upper part of the mold? a second db downwardly through the` upper part of the mold and into the. upperend of the first doweling element, and a packingof sand around the second doweling element between it and thevopening through which it passes inthe upper portion, combined substantially as set fort 5. A mold com rising, a mold-base, a core b'olted downwar( ly upon the core-base, a`

shell mold-portion resting upon the moldbase and surrounding the core, a mold-to section above the core, a first vertical dowe ing tube"y embedded in the top of the core and projecting up into the u per part of the mold, a second dovfeling tu e projectin downwardly through the upper art of t e mold and into the up er end of t e first doweling tube, .and a pac in of sand around the sec,-A ond'doweling tube gbetween it and the opening throu which it passes in the up tion, com ined substantially as set 6. A mold comprising a core-base, a series of upwardly shouldered tubes disposed there-- in arallel with the vaxis of the core, and a gri embedded in the sand of the core-base and having eyes engaging the bodies of said tubes above their shoulders and engaging downwardl upon said shoulders, comblned substantial y as set forth.

weling element projecting er porort 7. A mold comprisin a bottom-board, a i

vertical mold resting t ereon, a core supported by the base of the mold, lower bolts extending through the bottom-board and 4mold-base and into the core, u per bolts eX- tending downwardly throu h t e top of the f core, and detachable coup', gs uniting thel inner ends ofthe upper and lower bolts, 'oombined substantially as sei*J forth.

8; A mold eomprisin e bottom-homie Vertical 'mold resting t ereon, e core supported by the base of the mold, lower bolts extending through Lbhe4 bottom-board end mold-bese and into the Core, upper bolts eX'- tending downwardly through the to of the core; coupling blocks disposed wit 1in the core and having each u 'oeeslot, a. key uniting each lower bolt with e coupling block, and :i heed on the lower end of each upper bolt eneging the tee-slot of a. eoupling-bloek, com* Y ined substantially is set forth.

9. A mold eomprising, e. h'ottonr-bozird, s mold-base thereon, Vertical. nubes embedded in the mold-base and resting on the bottoniboerd, :i hollow core disposed over the moldbase end supported on said tubes, coupling blocks disposed within Jshe core over eeeh of im seid 'Lubes` lower bolts passing upwardly through the bottom-boord and nioldbs.se end eore-bzise and into the couplingr bloc/lis, keys sepiirably uniting ille upner ends of' the lower bolts with the eoulgiling aloe/ks, keys in lshe lower ends ol the lo er bolts l or drm-wing those bolts downimrdly, up )er bolts extending upwardly from the couplings into the top of the Core, heads on the llower ends oiV the upper bolts danielle-bly engaging the coul` y? ling-blocks, and nuts on the upper ends ol the upper bolts for drawing the Lopof the core downwardly, Combined substantially is sei; forth.

HERMANN BRINKER. -Witnesses:

LU'rin HALE, f M. S. BELDEN.

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