US1658836A - Molding apparatus - Google Patents

Description

F. C. T. DANIELS ET AL MOLDVING APPARATUS i Original Flled April 26. 1924 Feb. 14, 192s.

. l un f ll- ZH J4 31 ne@ I z s ATTORNEY Patented Feb. 1 4, 1928.

UNITED STATES FREDC. 'I'. 'DANIELSJAND WILLIMH. MCCAUSLAN'D, 0Fy BIllHT-EIl-I11M, PENNSYLVANIA, ASSIGNORSTO BETHLEHEM STEEL COMPANY.

MoLnING APPARATUS OriginalappIicatlon led April 26, 1924, Serial No. 709,125. `I Jivided and thisappllcation iledMay 18, l*

i Y 1926. -Serial110,109,847.

The applicationfis: a division of application SerialfNo. 709,125,filedApril26,1924.V

Our invention relates to molding apparatus and'it has for an object to provide a flask construction having gate and mold por! tions open to the top of the flask andjnot separatedfrom each other by any partition so thata molded article may be readily ref moved fromv the mold. i

A further vobject of our invention yis to provide abottom flask having gate and mold portions open to the top of `the Vflask and not* separated from each other by any partitiontogether with ar drag flask and a runner box for eoveringthe chambers, whereby the sand defining the gate opening between the channel of the vrunner box` and the mold chamber is effectively.reinforced` to preventV out-breaking of metalthrough the sand.

,A further object of our invention isv to provideanarrangement of drag plates having interlitting joints whereby 'the bottom Y flask molds and the coping be coaxiallyfformed. Y f A further object-ofour inventionis vto provide a mold construction made yup of a bottom flask,V an intermediate flaslnand a coping flasktogether with interfitting joints between the flasks, whereby rthe flasks may be readily fittedinto accurately assembled relation. i v y ,y

Heretofore thev` drag necksk and wabblers of chilled cast iron rolls havebeen molded kin an iron or steel flask so constructed that they aremoldedin one flaskwhile the gate is molded-.inea separatewflask, called they elbow'lflask and bolted vto ,thedraglasln Sometimes; this elbow flask has been cast in one piece-,with the drag flask, such asin our inventiom-but adividing partition between the two has alwaysbeenV retained. Then when the rollsare cast Aand ready to be removed from the sand, the gate must be first broken; or out ,0115 thus ycausing much labor, lloss ottimefand possible damage tothe -kcast-k ingf itselfortothefla'sk. 1n our invention this partition isomitted. Molding. is very much facilitated,l and. the castings. may y'be readily;` easily and cheaply'yremoved from the flask and sand without damage to the casting or flask. Our invention is adaptable to either hand Amolding or machine molding. Apparatus made in accordance with our yinvention is illustrated in the accompanying flasky molds mayk drawings, vforming a part- 'ofthisapplica tion2 inwhichp A Fig.` 1 is a. plan View of tlie`flask" and showing a section' of the runner box;

' FigxfQfis ay verticalfsectional View Aof the molding apparatus; f

Fig.. 3 is a vertical Fig. 5'is a detail'view ofa gate pattern.

l y y sectional View showing y the flask inverted yand placed 0n a drag. plate; f I

bReferring now tothe drawings and part1cularly to Flg.` 3,*the `flask 10 is inverted and plaeedon a drag plate11jV Thepattern 12 forthedragneckand the pattern 13 for,y the wabbler necl 'are firmly kfastenedto the drag plate 11, the pin 14 ofthe pattern 12r fitting thek central opening 15in the dragY plate.

, The `elbow pattern p16 is fastened to the drag'platekll withthe small end arranged' vtangent to the pattern 12 so 'that the gate shally assume the kproper tangential relation' to the neck.` The elbow patternl isfk made yin tw'o parts, 17V and 18, to'permit of' ready removal as ,hereinafter pointed out.`

rllheflask 1Q isnext inverted and placed in positionas'shown in Fig. 3,v and it is boltedL 01T fastened'.down't0 they (111159191315511 in Y l anysuitablemanner(v *The drag plate is pro-` v1ded withfa female portion 2O to receive'a male yportion 21 on the flask. Sand is inserted through the opening 22 and. the mold is prepared` the usualway.y In ycase a moldmg machine isused, the drag plate `11 is firstsecurely fastened in position on the Aplate of the machine.

.'When the mold iscompleted, the flask 10 is turned over and the patterns are withdrawn.' After, the patterns 12 and 13'and thekr part ,18 of the elbowy pattern are removeda the part l17 ofthe elbow pattern may be pushed back into thespace formerly oc cupiedby the part 18 and readily removed. The elbow! covering core isfnow placedffin position andx the; mold is ready to be black` enedanddriedi In connection ywiththe finali 4 y y elbow core, this' mayv .take t the n form of. a horn-like'pattern 23 shown in Fig. 5; which Vis inserted inthe space occupied by the twopart elbow pattern 16 and .then sand is packed therearound tot provide a` smooth curved gate passage.k

In molding the cope, as may be seen from Fig. 1, a cope molding plate Q6 is placed directly on the (trag plate 11, the plate QG, having a lower projection 2i' to tit the recess Lltlin the drag plate 11 and an upper projection to tit a recessv Q9 in the cope flask Drag neck and wabbler patterns 12 and 13 are fastened to the plates 11 and 2G bcilore the flask is placed in position. The

cope mold is now prepared in the same mannerns the bottom flask mold, already referred to. i

Upon reference to F ig. 2, it will be seen that the drag flask is placed on top of the bottoni flask 10, the lower end of the drag flask having a recess 31 to receivev the projection 21 at the top ot the bottom flask. `Likewise, the upper end of the drag flask is provided with a projection to fit the revcess in the cope mold.

Referring more particularly to Figs. l, and 3, it will be seen that the bottoni flask l0 is provided with a lateral spout portion 31 which is open to the top of the flask so that the gate is not covered by a portion p of the bottom flask. To prevent metal from breaking through sand at the top of the spout, it will be seen that thetop of the spout is covered by the drag mold and also by the bottom flange 32 of the runner box 33. A i

The runner box is provided with an upper flange 34 to which is fastened the lower flange 35` of the funnel member A36. The `flanges 32 and '8l are preferably of different sizes so that each runner box may be 'caused to fit d'rag'molds of different sizes.

.lVhile I show a drag flask 30 of the chill mold type, it will be apparent that a .flask of the sand mold type might be used. Also, itarticles, such as rolls, are to be cast,'cir cumferential rings may be provided; and such articles may be cast and chilled or cast merely in sand. In other words, in so far as our invention is concerned the mode of casting is immaterial, our invention relating to an improved mold construction consisting of accurately fitting parts and means whereby the bottom flask and top flask molds may be quickly and economically prepared either by hand or by machine, the bottoni fla-sk having mold and gate portions each communicating with the other through* out its height so as to avoid any bridging piece or partition. Y

Afteran article is molded, the cope and drag molds and the runner box are removed, whereupon the molded article, such as a .roll1nay be readily removed with the gate port-ion attached, the gate portion passing up\\'ardly of the spout and breaking theI sand above it. ln this way, the removal of runner liox elliows and breaking of'l' of gate portions incident to removal of' molded articles, involving labor and frequent breakage ot the bottom mold are avoided. After the article removed, the gate portion may be broken or cut ofl without much likelihood of damaging the article'as is the case where the gate portion is broken off incident to removinov the article, from the bottom mold. is the spout portion is entirely covered by the drag mold and the flange of the runner box, the sand of the mold is effec tively reinforced, thereby preventing any breaking through the sand of metal from the gate.

llaving thus described the invention what we claim as new and desire to secure hy Letters Patent is:

l. ln molding apparatus, the combination of a bottom flask having a mold portion and a gate portion each open to the top oi the flask and not separatedfrom each other by any partition, a drag plate, va pattern connected to the drag plate 'and extending into the mold portion ot the flask, and a two-part elbow pattern having one part connected to the drag plate and havingits other part contacting with the first part and contacting with the first pattern, said two-part pattern having the drag-plate connectedpart arranged within the gate portion or" the flask and having its other part arranged partly in the gate port-ion of the flask and partly in the mold portion thereof.

2. In molding apparatus, the combination of a bottom flask having a mold portion and a gate portion each open to the topof the flask and not separated from each other by any partition, a drag plate, said flask having an annular projection adapted to fit an annular recess in the drag plate, a patternconnected to the drag plate and extending'into the mold portion of the flask, and a two-part elbow pattern having one part connected to the drag plate and'having its other part cont-acting with the first part and contacting with the first. pattern, said two-part pattern having the drag-plate connected part arranged within the gate portion of' the'flask and having its other part arranged partly in the gate portion ofthe flask and partly in the mold portion thereof.v

In testimony whereof I hereunto affix my signature this 8th day of4 May y1926.

FRED C. T. DANIELS.

In testimony whereof I hereunto aflix my signature this 8 day of May 1926.

i TWILLIAM H. MGCAUSLAND,

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