US1535343A - Slip jacket and method of making it - Google Patents

Description

April 28 1925. 1,535,343

E. P. ROTHACKER SLIP JACKET AND METHOD OF MAKING IT Filed Jan 14, 1920 3 Shee'tS-Sheet l ank-: 7.

April 28, 1925.

, 1,535,343 E. P. ROTHACKER 'SLIP JACKET AND METHOD OF MAKING IT 5 Sheets-Sheei 2 Filed Jan. 14, 1920 fDWAED PEorHAC/rm April 23, 1925. 1,535,343

E. P. ROTHACKER SLIP JACKET AND METHOD OF MAKING IT Filed Jan. 14, 1920 3 Sheets-Sheet s i Patented Apr. 28, 1925.

UNITED S TATES PATENT OFFICE- iEDWARD I. .ROTI-IAGKER, OF GLEVEL'AND, OHIO.

SLIIJACKET IAND METHOD OF MAKING- .IT.

Application filed January 14, 1920. Serial-No. 351,447.

To all whom-'itrmag concern Be it known that I, 1 EDWARD P. Ro'rrrAom ER, a citizen of the "United States, residing i which "have contemplated applying '.that j principle iso "as-to distinguish it from other inventions.

invention relatesboth to .a'slip jacket *for foundry use andto the .methodo'f casting the same.

Slipja'ckets are usedtorepla'ce a flask to confine a finished mold until and during the "time when'metal is to'be poured into the mold. Slip jackets being lessexpensivethan "flasks are employed to enable prompt. reuse 'o' fthefias'k inthe preparationo'f duplicate 'moltls. Slip *ja'ckets may have either straight or sloping sides and have heretoiore, been of composite construction usually comprising steel plates welded or otherwise secured together "at the corners.

Experience has demonstrated however, that "slip jackts so constructed become warped.

*I propose the "manufacture of slip jackets cast in one'piece,mindfuljof the iact that castiron*holdsitsishape regardless of alternate heating and cooling. 7 It is essential thatthe walls of a slip jacketbe smooth and precisely 'iormedin' orderth'at equisized jackets may be interchangeable and 'to insure against the sand bulging out over even relatively 5 small areas during the "pouring operation. Besides the "factor of economy, it is manifest that minimum weightis an "advantage, 'and'I have discovered that the thickness of cast ironislip jackets need not exceed three sixteenths of an inch.;

I have provided the sides of my slip jacket with means whereby "wooden handles may 'be detachably connected, wood being (it good insulation "against heat and (due to its "cheapness may bei'frequently replaced, This feature er my invention l b'elievetobe patentably novel. I "Knownioundry*praetice does not enable the successful'productionof cast slip jackets because oithe impossibility of withdrawing the pattern if th'esantl is packed "on both sidesbffthe latter inthe same mold, andbecause ="a least su j a ket cannot reliably "be niade with ascore whichwould become dise torted in shape. Exceptior the handle lugs,

in'prepar'ing the mold accordingto my invention,'Ie1nploy only green sand. vAnother seeming obstacle which I have overcome is to make possible the insertion of a gate pattern because, as those skilled in the art will readily discern, a uniform feeding and spread of metal to the mold cavity is desirable'if not indeed necessary.

This application is to be considered, in respect to all contimon subject matter, a continuation of my earlier application filed May 12, 1919, Serial No. 296,697.

Adverting to the drawings Figure I is atop plan view of cast metal slip jacket embodying. my invention, a sug 'gested shape of gate being indicatedin dotted'lines.

Figure II is a'sideelevation of the same. Figure III is a sectional view showingthe jacket in place around a mold. Figure IVis aibottom plan view of my design forxslip jacket, likewise showing in dotted lines a suggested form of gate.

Figure V is a plan view of the pattern of fthe'drag withthejpattern of the lower gate .in place.

.Figure VIlis a section onlline VIP-VI of Figure V with the flask'for the drag side surmounted thereon.

moved from its mold and also showing a simplesprue. V

Figure VIII is a plan'view of the cope pattern with the pattern of theupper gate in place.

FigureIX is a section through a corefor making a handle retaining lugs on the jacket;

Figure X is a section on line XX of Figure VIII with the flask for the cope side inverted upon a follow board.

Figure IXI is a median section of the completed mold.

vThe illustrated slip jacket consists of a four sided frame 1 provided on each of oppositely disposed sides with a pair of lugs 2 forming a d0ve tailed channel for the insertion of wooden handles 3. It should be understood that the handles 3 are removably fitted in place so that whenever they become over charred or burned they may be removed and replaced with new ones. In Figure III the slip jacket is shown em Figure VII is a similar View showing the drag turned over and the ,drag pattern rebracing a mold 4 including a cavity 5 to which a sprue 6 leads.

The method of casting a slip jacket of thin light construction and of uniform thickness proved to be a problem the solution of which I will now describe.

A hollow box or female pattern 7 is provided with a cavity 8 which is open above' as shown in Figure VT. The pattern 7 carries on opposite sides angle irons 9 provided with holes 10. After filling the cavity 8 with sand and suitably packing the same level with the upper surface 11 of the pattern, I lay thereon a gate pattern having the shape shown in Figures IV and V. It will be understood that the shape of the gate pattern 12 may be varied provided it enables the metal to spread uniformly toward the sides. A flask 13 stiffened by cross bars 14 carries on opposite sides angle irons 15 provided with pins 16. As is common practice, the pins 16 are adapted for insertion in the holes 10 to hold the flask in its proper surmounted position. Next the flask 18 is filled and rammed up with sand 17 thereby, of course enclosing the gate pattern 12. The flask 13 for the drag side is then lifted to enable the gate pattern 12 to be drawn and removed. Then a sprue 18 is cut. Thereupon the flask 13 is again placed over the pattern 7 and both members inverted in the usual manner upon a floor. Next the form pattern 7 is lifted away from the sand form 19 which occupied the cavity 8, as appears in Figure VII.

Another flask 20 provided with lateral irons 21 having holes 22 is. similarly stiffened. by bars 23. The flask 20 is to be mounted upon a follow board 24 provided with angle irons 25 which carry pins 26. A block or male pattern 27 is fastened to the upper side of the follow board 24 by means of screws Two oppositely disposed sides of the pattern 27 are fashioned each with a pair of inclined core prints 29 to eventually produce cavities for the reception of four cores 30 provided with interiorly open cut-outs 31 separated by a core section 32. Such core is shown in Figure IX and is shaped to enable the formation of the two lugs 2 as will be readily understood by those skilled in the art. Carried upon the top of the pattern 27 integrally or detachably is a gate pattern 33 of the same shape as the gate pattern 12. After the flask 20 is fitted upon the follow board 24 so as to enclose patterns 27 and 33 as appears in Figure X, it is filled with sand and suitably packed. Then a central sprue is cut down to the pattern 33, after which the flask 20 and follow board 24. are together inverted upon another board or floor not shown. Following this, the screws 28 are removed, the follow board 2 L removed and the patterns 27 and 33 drawn after having been previously rapped. It is at this stage, that the four cores 30 are placed in the core print cavities left after the withdrawal of the core prints 29. The flask 20 for the cope'side is now again inverted and placed over the flask 13 for the drag side, the pins 16 of the latter passing through the holes 22 of the former, in which position the sprue 3st is directly over or in registry with the sprue 18 and the mold completed as appears in Figure XI. The mold will be seen to include a cavity 35 for the upper gate, a cavity 36 for the lower gate and a cavity 37 for the slip jacket casting.

I claim:

1. The method of casting a slip jacket which consists in making a male sand. mold section, fashioning the top of a larger female sand mold with gate sprue, and cutting a sprue through said female sand mold to cause it to communicate with said gate sprue. and introducing molten metal to said sprues.

2. The method of casting a slip jacket which consists in making a female sand mold section, fashioning the bottom of a smaller male sand mold with gate sprue, and cutting sprues through both male and female sand molds to cause them to communicate with said gate sprue, and introducing molten metal to said sprues.

3. The method of making a slip jacket which consists in filling a box pattern with sand, enclosing with sand a block pattern larger than the interior of said box pattern, removing said patterns, bringing said mold portions into juxtaposition, and causing molten metal to flow both upwardly and downwardly around said mold.

41.. The method of making a slip jacket which consists in superimposing a flask upon a box pattern, filling both pattern and flask with sand placing a block pattern larger than the interior of said box pattern upon follow board, enclosing said block pattern by laying a flask upon said follow board, filling said flask with sand, inverting both tl asks and molds leading sprues to each mold ivity withdrawing said patterns, replacing the block mold cavity over the box mold cavity to effect a registry of said sprues and causing molten metal simultaneously to flow through said sprues.

5. The method of making a slip jacket which consists in superimposing a flask upon a box pattern, filling both pattern and flask with sand, cutting a sprue, enclosing with sand a block pattern larger than the interior of said box pattern, cutting a sprue. removing said patterns, bringing said mold portions into juxtaposition so that said sprues register, and causing molten metal to flow around said mold upwardly from the bottom of one sprue and downwardly from the-bottom of the other sprue.

6. The method of casting a slip jacket "which consists in straddling the upper open messa e laying a flask for the cope sidewupoma foL that said flask encloses said patterns filling said cope flask with sand, inverting, draw ing. the. patterns "and covering: the drag supported mold with the cope supported cavity.

7. The method of casting a slip jacket which consists in laying a gate pattern across the top of an open box pattern, covering with a flask for the drag side, packing opposite sides of said gate pattern with sand, inverting the parts, cutting a sprue, lifting the box pattern, laying a flask for the cope side upon a follow board which detachably carries a block pattern and surmounted gate pattern so that said flask encloses said patterns filling said cope flask with sand, inverting, cutting a sprue, draw ing the patterns, covering the drag supported mold with the cope supported cavity, and pouring molten metal simultaneously through said sprues.

8. The method of casting a slip jacket which consists in filling a female pattern with sand laying a gate pattern thereon, covering with a flask for the drag side, packing said drag flask with sand, cutting a central sprue to said gate pattern, lifting the drag flask, removing the gate pattern,

replacing the drag flask upon the female pattern, inverting, lifting off the female pattern, laying a flask for the cope side upon a follow board which detachably carries a male pattern and surmounted gate pattern filling said cope flask with sand, inverting, cutting a central sprue to said gate pattern, drawing the female patterns, covering the drag supported mold with the cope supported cavity to bring said sprues into registry, and pouring molten metal simultaneously through said sprues and to all sides of said mold cavity along said gate cavities respectively.

9. A slip jacket provided on opposite sides with laterally extending slots, and handles detachably insertible into said slots.

10. The method of molding which consists in fashioning a main mold cavity with a core print cavity and inserting into said core print a core having cut-outs so that the latter communicate with said main mold cavity, said cut-outs enclosing a dovetail shaped core section.

ll. The herein described method of molding which consists in making a looped or endless mold cavity and a core cavity communicating therewith, inserting in said core cavity a hollowed core opening into the looped cavity and causing molten metal simultaneously to flow around said looped cavity in itb'oth wdirectibns to fill the core hollows. U

1 2. "The z-method of inaking a slip jat'ket which consists in %bringing male. and female sand; po1tions ti nto' juxtaposition, and caus- "l0 ing imolten metal to Tfiow bothmpwardly and "downwardly around said mold.

i=3. The method of making a su j acket svl lich cons-ists in super-impo'siing a flask over :a box i pattern :and a surmounted ga'te pattern, filling with sand, cutting a central sprue, enclosing with sand a gate pattern and a block pattern larger than the interior of said box pattern, cutting a central sprue, removing said patterns, bringing said mold portions into .justaposition so that said vsprues register, and introducing molten metal to cause it to flow through both central sprues and through said gate sprues and around said mold upwardly from the bottom of one sprue and downwardly from the bottom of the other sprue.

14. The method of casting a slip jacket which consists in straddling the upper open side of a box pattern with a gate pattern, covering with a flask for the drag side, packing said box pattern, the interstices of said gate pattern and said drag flask with sand, inverting the parts, cutting a sprue, withdrawing the patterns to expose the male sand mold; laying a flask for the copeside upon a follow board. which carries a block pattern and surmounted gate pattern so that said flask encloses said patterns, filling said copeflask with sand, cutting a sprue, inverting, drawing the patterns, covering the dra supported mold with the cope supporte cavity and introducing molten metal to all of said sprues.

15. The method of casting a slip jacket which consists in laying a gate pattern across the top of an open box pattern, covering with a flask for the drag side, packing opposite sides of said'gate pattern with sand, separating said box pattern and flask, removingi said gate pattern, restoring said box pattern and gate pattern to juxtaposi tion, inverting the parts, cutting a sprue through the male sand mold, lifting the box pattern from the latter, surmounting a larger female mold over said male mold, cutting a sprue through said female mold so that it will register with said first mentioned sprue and introducing molten metal through said sprues to reach and be distributed through said gates.

16. A cast metal slip jacket provided with wooden handles having a mortise 'andtenon connection with said jacket, said connections extending horizontally along opposite sides of said jacket.

17. The method of making a slip jacket which consists in bringing male and female sand portions into juxtaposition with the former intersecting the latter so that a pas- 10 around said male sand portion, providing communicating sprues in both sand portions and causing molten metal to flow from one sprue across the top and down around said male sand portion and from the other sprue across the bottom and up around said male sand portion.-

Signed by me, this 13th day of January, 1920.

EDWARD P. ROTHACKER.

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