US921640A - Sash-weight-molding apparatus. - Google Patents

Description

B. H. COOPER & T. '0.HENRY. SASH WEIGHT HOLDING APPARATUS. APPLICATION FILED D110. 16, 190e.

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B. H. COOPER L T. 0. HENRY.' sAsH WEIGHT MOLDING- APPARATUS.

APPLICATION FILED DEO. 16, 1908.

Patented May 11, 1909.

2 SHEETS-SHEET 2.

G Hoz/naga( THE Nmzms PErERs co., wAsHmcroN, n. c.

UNITED STA PATEN FFXCE. @cornealnnnnrroUnnR-Yco., or Traun into-TE,infinitiveJ -irriinrnnnsiiir i i clamps and` inetal pouredz'in through the central Aopeii.- ine: elf ,siete 251e the. @Bekend`10relatel ally iii all directions;through ithedistritat- QTleftiii thetop i. l'.i..imfg.fb5ifl sate el? liiuerattiis i0V this .Palit aftned rto the Vprop e lside' of the" stripping plate will` be presently :'delserbed) into TO; @ZZ @bereitete/l@arte- I f yBe at known th tiHQwe,y` BENJAMIN Qoornitand, flriorri-is Hanny, `citizens y'of the Uetaltates; .residing t. atpTeire Haute iatheffeuilty. et Vigo and State. Qf indiane, .here intente-d.- Certain .new and. instal i .1111,- rroreent in .iSash:lleehtMQldne entre# lates Ot which the talleres iS@ a Streetra- :Tlie pliiucipal Object 0fl 01u?. .present 'i1- ientien. ,te produce Sash nights @t a isa.- perior quality wit/ lia yminimumof labor.` A Afurther .Qbieet is t0. .iltldueWeights1 0f any desired length by means of the same pattern or mold.

These objects are accomplished by means ofian improved molding apparatus embodying certain novel features which will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure l is a central vertical sectional View of a mold after the same has been prepared ready to receive the molten metal where the molding has been done by means of our present invention; Fig. 2 is a similar view of the pattern flask and combined strip ping and sprite-pattern plate just after the sand has been introduced,-the last inentioned plate being adjusted to one of its several positions in order that one particular length of window weight may be produced, and the sa me being sh'oiin in connection with a machine for mechanically packing the sand around the molds; Fig. 3 a sectional view of the cope after the sand has been packed but before the cope plate has been removed; Fig. Ll a plan of the pattern plate with a portion of the patterns attached thereto` the position of the other patterns being indicated by means of dotted lilies; Fig. 5 a plan of the stripping and sprue-pat-,tern plate; Fig. 6 a plan of the cope pattern plate with the p0- sitioiis of a portion of the number-plate patterns indicated by means of dotted lines; Fig. 7 a perspective view of one of the linished weights, and Fig. 8 an end elevation, showing the number indicating the weight.

In my improved means of molding sash weights the flask, in condition for use, consist-s (as is best shown in Fig. l) of a main portion of drag 2l., a cope 22 and a plain bottom plate 23. These are secured together tei'ns. lhen'iolds properl plain. cyiiilidael s i neme `-^1ee Stratmann openings Aiii the sand`,' `aiidy `t 'l`ie` resulting weights, therefore, are without fins or any rough protuberances, as will be readily undeistood, Said weights instead of having eyes cast therein by means of cores, in the ordinary manner, have wire eyes, c, which are placed in the ends of the molds prior to the molding operation, and areleft thereby in the sand, where the molten metal will come in contact with and surround the shanks thereof, as will be presently more fully described.

Iii the molding of these sash weights the drag or main portion of the flask is placed with its upper side downward and rests upon the combined stripping` plate and sprne or gate mold 3l, being held in accurate relation thereto by means of pins 32 on shanks of the eyes c are then placed in perforations in ears 2l on said inain portion of4 the liask, and keys 3Q which pass through said pins above said ears.

The pattern plate -ll bearing the desired number of weight patterns l2 (fifty-eight such patterns are shown in the construction illustrated) is placed below said stripping plate, with the patterns projecting up through holes in said plate into the chamber within the walls of the llask. These weight patterns are made of a length sutliciently great to produce the longest and heaviest weights desired. T he particular length and weight desired at the time is then secured by interposing between the pattern plate and the stripping plate distance blocks 43 of a diaiiieteiequal to the difference between the length of the patterns and the length of weight which it is desired to produce. The shanks of the eyes e are then placed in perforations in the free ends of the weight patterns 42. into which they lit with a suitable degree of looseness, and the sand is then packed around the molds until the side walls rariteiten of the flask are filled level full. The mold l plate and molds are then withdrawn, leavingl shown by the full lines in Fig. 2.

the eyes e in the extremities of the mold cavities, and the drag or main portion of the flask is reversed in position and permitted to rest upon the bottom plate 23, to which it is firmly secured, as by clamps 24.

The cope having previously (by means of the cope pattern plate 5l and the number patterns 52) been suitably molded, is placed up on and secured to the drag, as by clamps 25, as is best shown in Fig. l, and the weightsv are molded as previously stated. As will be readily seen, the eyes c being ordinary screw-'eye blanks, no cores are required or used in this operation, and the mold patterns being firmly secured to the mold pattern plate are held rigidly in proper position. As will be seen by an inspection of the plan of the combined stripping plate and gate or sprue pattern, the holes in said plate through which the patterns pass intersect the sprue patterns in such a manner as to insure a proper distribution of the molten metal during the process of molding. The result is that Vthe molding is very rapidly and easily performed, and results in the production of a large number of weights at each operation, of any desired length, and of unusual uniformity and smoothness. This is one of the sorts of molding where there is great advantage in the use of a mechanical tamper for packing the sand about the patterns. Owing to the very great amount of friction between the patterns and the sand, due to the very large number of patterns employed, it is also desirable to provide mechanical means for withdrawing the patterns from the sand after the tamping or molding operation has been completed.

I Referring now especially toFig. 2, we have illustrated an air cylinder 61 containing a piston 62, below which is an air inlet 63 communicating with a line of pipe 64 leading from a suitable source of air supply, (as an air compressor) not shown. This air inlet is controlled by a valve 65. A very short distance above the air inlet we provide an opening or openings 66 through which the air may escape, and which preferably enters a chamber 67, which is provided at one point with an escape pipe 68, leading to the open air, which is controlled by a valve 69. Vhen the valve 69 is open, and the air pressure is turned on by the opening of valve 65, the result is a very rapid reciprocation of the piston to which the mold is attached; and the sand (being allowed to run into the flask gradually) is, by this constant reciprocation and jarrino', evenly and firmly packed about the weight patterns. When the flask is properly filled, the valve 69 is closed, and the complete 'flask (containing the patterns and sand) is elevated by the air pressure to the position The flask is then swung around slightly so that the ears 31 on stripping plate 31 rest on the top of columns 60, thereby supporting the weight of the flask by said columns. The keys 32 are then removed. The air pipe 64 has a branch which leads to the upper end of cylinder 6l which contains a valve 7l. There is also an outlet pipe 72 at or near the upper end of the cylinder containing valve T3. The valve 73, which has been left open during the operations up to this point, is now closed, and the valve 71 and also the valve 69 are opened. Air pressure is thus applied to the upper side of piston 62, which is thus operated to draw pattern plate 4l and patterns 42 downwardly, thus withdrawing the patterns through stripping plate 3l from the flask, ready to receive either the same vor another flask body for repetition of the operation.

The fia-sk in which the molding operation is completed is then transportedvto a suitable place for the molding operation, which may be convenientlydone by swinging 4it :ti-oma crane by means of its gudgeons 2 1", and the parts are then brought into the relations shown in Fig. l, ready for the casting operation. y Y

Having thus fully described my said invention, what we claim as new, and desire to secure by Letters Patent, is, Y

l. The combination, in a sash weight mold, of a body flask, a combined stripping and sprue pattern plate, and a pattern consisting of a plate having .a plurality of weight patterns attached thereto, said stripping and sprue-pattern plate resting on and l supported by the plate of said pattern during the molding operation, and having holes registering with the weight patterns and through which said weight patterns extend during the molding operation.

2. The combination, Vin a sash 4weight mold, of a fiask body,` a pattern plate carrying a plurality ofweight patterns, and a combined stripping and sprue-pattern plate having holes through which the weight patterns extend and interposed between the pattern plate and the flask body, and arranged to rest upon the pattern plate during the molding operation. Y

3. The combination, in a sash `weight mold, of a flask body, a pattern plate carry- `molding apparatus, with the flaskvcontaining the molds, of a stripping plate secured to the under side of said flask, a pattern plate carrying patterns arranged below said stripping plate With the patterns extending up through the holes in said stripping plate into said flask, and a piston and cylinder arranged below said pattern plate and secured thereto, whereby the complete flask is first raised to a considerable height, there secured, and then by a reversal of' the pressure the pattern plate carrying the Weight patterns is Withdrawn from the flask.

5. The combination, in a sash Weight mold, of a flask, patterns of the general forni of the Weights to be produced and provided with eye-receiving orifices in their inner ends and adapted to extend longitudinally into the sand Within the flask, and a stripping plate through Which said patterns extend and through which they may be Withdrawn leaving the eyes carried by said eyereceiving orifices Within the mold cavities.

In Witness whereof, We have hereunto set our hands and seals at Terre Haute, Indiana, this twelfth day of December, A. D. one thousand nine hundred and eight.

BENJAMIN H. COOPER. [L s] THOMAS O. HENRY. [1.. s]

lVitnesses ELr CHAMBERS, FRANCES O. FEILER.

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