US888004A - Molding-machine. - Google Patents

Description

. PATENTED MAY 19, 1908:

- A. T. DRYSDALE.

MOLDING MACHINE,

APPLIQATION FILED NOV.15. 1906.

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ALEXANDER T. DRYSDALE, F LOUISVILLE, KENTUCKYL MOLDING-MACHINE.

Specification of Letters Patent.

Patented May-19. 1908.

Application filedNovember 15, 1906. Serial No. 3%,571.

T 0 all whom it may concern:

Be it known that I. ALEXANDER T. 'D'RYsimproved machine with the parts in initial in the parts in successive positions. 20 I pggition; Figs. 2, 3 and 4, similar views showi n the drawings indicates a pedestal which, at its upper end, supports a hollow casing 11, the upper end 12 of which forms s 'tialy uniform cross section.

' ling-valve 23.

the follow board having a central opening adapted to fit the pattern 13, which pattern rovided with a portion 13 of substan- Pattern 13 is carried at the upper end of a plungerlvertically reciprocable within a cylinder 15 formed in the upper end of )edestal 10. Leading into cylinder 15 is a eed pipe 16 having a suitable three-way controlling valve 16 At an intermediate point'pedestal 10 is provided with an enlargement forming a piston head 17 which fits the interior of a cyl inder 18, thus forming, within said cylinder, an upper chamber 19 and a lower chamber 20, the lower end of the cylinder fitting snugly upon the lower cylindricalend of the pedestel 10, as shown. Sleeved upon the upper end of pedestal 10 is a hollow plunger 21 which extends down into chamber 19 of cylinder 18, the upper end of'the cylinder 18 fitting the exterior of said hollow plunger snugly. Leading into chamber is a supply pipe 22 having a suitable controlling valve 22 and leading into the chamber 19 is a suitable supply ipe 23 having a control- T 'e'f hollow plunger 21 carries a stobl 25 at its upper end, said stool being adapted to support a supplemental flask 26. The supplemental flask 26 receives the main flask 27 and the upper endof main flask 27 receives a second. supplemental flask 28, the depth of the supplemental flasks bemg suches to provide for proper compression of the sand, as described later. Pivotallyconnected to the cylinder- 18 by suitable bars 30 is apressure head 31 which carries a compression plate 32,adaptedto enter the upper end of the supplemental flask 2 8, I

The operatlon is as follows: With the parts in the positions shown in Fig. 1, the several flasks have been filled with sand and there is a fluid pressure within the lower end of cylinder 15 and within chamber 19, said pres-- sures being sufficient to hold the attern 13 in its initial position and the. stoo 25 in its initial position. Fluidpressure is then introduced into chamber 20, said fluid pressure being in excess of the fluid pressure in chamber 19. Thereupon the cylinder 18 is moved downwardly over iston 17 tothe position shown in Fig. 2, t e compression plate 32 passing down through the supplemental flask 28 until it comes level with the to of the main flask 27 At the same time -t 1e cross head 31 comes into en agement with the top of supplemental flas 2 Further fluid pressure within-chamber 2 causes the flasks to move downwardly relative "to'the follow board, which remains stationary, and, the. attern being supported by a fluid pressure ess than the fluid pressure exerted in cham-- ber 20, the pattern also yields downwardly and moves down through the follow board until the arts are brought to the positions shown in *ig. 3, where the follow board lies even with the lower end of the main flask 27, the sand being thus "compressed immediately adjacent the pattern. lhereupon the fluid pressure is withdrawn fromc *linder 15 and the pattern sinks to the position shown in Fig. 4. Thereupon fluid pressure is Withdrawn from chamber 20 and introduced. into chamber 19, thus driving cylinder 18 and the hollo'w-plun er 21 u ward toheir initia positions, so that flas 27 with the con letcd mold therein may be withdrawn, a ne flask introduced, the several flasks filled with sand, and the operation repeated. i

It will be readily understood that other means maybe used to effect the necessary movements of the compression plate, the flasks and the pattern, without departing from my invention.

I claim as my invention:

1. In a molding machine, the combinetion, with a'stationaiy follow board, of a pattern support and pattern movable relative thereto whereby there is a stripping action between the follow board and pattern, a flask support also movable relative to the follow board, and a com ressor plate arranged to coact with the 0 relative thereto.

2. 'In-a molding machine, a pedestal, said pedestal having a cylinder in 1ts upper end and a piston head intermediate its ei ht, a cylinder sleeved upon- "said piston means for introducing fluid pressure into said cylinderlupon each side of the piston head,

OW board and movable means for introducing fluid pressure into the -ton head intermediate its eight, a cylinder sleeved upon said piston head, means 'for introducin fluid pressure into said cylinder upon eac side 0' ead,

ollow board, flask support, patthe piston head, means for a introducing fluid pressure into the pedestalcylinder, a plun er mounted in said pedestalcylinder, a tubu ar plunger sleeved ucpon the pedestal and projecting into one en of the cylinder sleeved over the piston head, a pattern carried by the plunger, a follow board carried by the edestal, a flask support carried b the ho OW plunger, and a compres- 4 sion p ate carried by the movable cylinder,

the said movable cylinder carrying means for I engaging flasks carried by the flask support all of said arts being combined and arranged substantia ly as and for the purpose set forth. 4

Inwitness whereof, I, have hereunto set my hand and seal at Louisville, Kentucky, this ninth day of November, A. D. one -thousand nine hundred and six.

ALE ANDER T. DRYSDALE. [his] Witnesses:

. AUSTIN B. KINNAIRD,

ROBERT CLARK MARSHALL.

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