US1717651A - Molding machine - Google Patents

Description

June 18, 1929 E. o. BEARDSLEY ET AL MOLDING MACHINE Filed Dec. l, 1924 3 Sheets-Sheet mmv KM) )maa/P74@ June 18 1929 E. o. BEARDSLEY ET A1. 1,717,651

MOLDING MACHINE Filed Dec. l, 1924 3 Sheets-Sheet 2 Cil Patented l June '.'UNIIED. STATES 'THE REARDSLEY a ILLINOIS.`

Param OFFICE.

IJLIIER o. REARDsLEY AND WALTER R PIPER, OF' cIIIOAeO, ILLINOIS, AssI-GNORS 'ro v PIPER COMPANY, OI' OHIoAeO, ILLINOIS, A CORPORATION or MOLDING MACHINE.

.Application led December'l, 1924. Serial'No. 753,095.

The invention relates to molding machines. \zontally In the Operation of molding machines ofthe ltype which projects Wads of sand at high speed into flasks with a projector-head that is movable horizontally to ill all portions of.

the flasks, it has been found to be desirable in some instances to raise or'lower the head when the machine is used to ill iiasks of Widely varying heights. `One object of the invention is to provide an improved molding machine in which the projector head is vertically adjustable for this purpose. l

Another object of the invention is to provide a projector-head which is vertically adjustable y power-drivenmechanism to facilitate its vertical adjustment.

Another Object is to provide sand feeding mechanism which is adapted to be automatically adjusted to maintain a continuity of the feed of sand to the projector-head while it is in different vertical positions.

Other objects of the invention will from the description.

The invention consists inthe several novel appear features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a side elevation of a machine em- .bodying the invention. Fig. ll'is a detail section of the upper sand conveying belt. Fig. 2 is a plan. Fig. 3 is a vertical section on line 3 3 of Fig. 2 throughthe projector and the arm on which it is mounted. Fig. 4 is a plan view of the lifting mechanism, parts being shown in section. Fig. 5 is a transverse section on line 5-5 of Fig. 3

through the projector-head. Fig. 6 is an enlarged section on line 6-6 of Fig. 1. Fig.'7 is a vertical section of the parts shown 1n v Fig. 6.

The invention is exemplified in a machine of the general type exhibited in Patent No. 1,309,833 granted to us July 15, 1919, in which a rojector-head A is mounted on t-hc free eng of an arm B which is pivoted to the distal end of a jib C which is pivoted to a support so it can swing horizontally, the arm and jib forming a support for the projector-head which permits the latter to be swung horito any desiredl point within a prescrlbed range to project wads of sand into all portions of subjacent flasks. The projector-head comprises a casing a, a rotor com- !prising a body 'a' and a projectorblade a2 hwhlch coacts Wlth a removable liner a3 to shear wads of sand from a stream fed into the casing b y abelt b', as more fully set forth in an appllcatlon filed by us February 28, `1924; serially numbered 695,705. The shaft a* o' the rotor extends longitudinally through the arm B, whichtis tubular'for that purpose; to

an electric motor D, which is carried at. the inner end of the arm B. This motor also serves to drive the feed-belt b through suitable gearing, as more fully exemplified in Patent No. 1,408,493 dated May 7, 1922. A-

hopper b2 is carried by arm B to direct the sandV onto the belt b. Said arm ispivotally connected to the j ib v(l by a stud b3 carried in antifriction bearings in a bracket c suitably fixed to the Outer end ofv the jib C.

The jib C is formed of tubing and its inner end is fixedly secured in a socket 10 formed 1n a bracket 1'1. A square column 12 extends vertically through the bracket 11 and is provlded with rollers 13 and 14 having V-'shaped peripheries to fit the cornersof the standard 12, so that the standard will turn with the jib. This standard issupported at its lower end on any suitable sup Ort, such as a housing 15,bymeans of an antlriction bearing which will permit the standard to rotate freely with the jib C. A plate 16, fixed to the housing 15,

carries a race 17 for balls 18 which carry a collar 19 which is fixed to the lower end of standard 12. A dust capl 20 is secured to standard 12 by a screw 2l and extends over the ball bearing to exclude sand therefrom. The

upper end of the standard 12 is held against lateral displacement by a ball-bearing 22 held in a bracket 23 which is rigid with the support 15, being secured to a column 24 on the housing or otherwise suitably supported.

. The column 12 is extended, as at 25,. through .and above the bracket 23, and a supporting bracket or table 26 is rigidly secured to the upper end thereof, so that it will turn with the column and the jib C. This bracket carries the motor and gearing for driving an endless belt 27 for feeding sand into the chute 2 on the arm B.' The upper end of belt 27 passes around a pulley 28 which 1s mounted to rotate on a shaft 29 which is 1n bearing30 and 31 formed in a houslng 32 which 1S lted to the supporting bracket 26. An

electric motor 33 is enclosed in said housing and a pinion `34, xed to its shaft, meshes.v

with a gear which is keyed to the hub 36 which projects from one end of the ulley 28 to drive the sand-feeding belt 27. ousing 32 is extended, as at 32", to enclose said gearing and is rovided with a removable side 32" to provlde access to the gearing. The housing is also provided with a removable section 32 to provide access to the motor. The lower or outer end of belt 27 is carried by an idler pulley 3 The shaft 38 of this pulley 1s carried by a pair of members 40, the upper ends of which are pivoted to swing around the shaft 29 which carries the pulley 28, so that the lower end of the belt may be ralsed and lowered to maintain its o erative relation with the chute b2 in the di erent vertical positions of the projector. x

Each member comprises a rod 41 provided with a bearing 42, tting around shaft 29, a tube 43 fixed to the rod 41, and a rod 44 provided at one end with a bearing 45 for shaft 38 and having its other end extended into the tube 43 and threaded for enga ement with nuts 47, whereby the distance etween shafts 38 and 29 may be varied to keep the sand belt 27 taut. The outer ends of members 40 are retained in seats 48 in a forked bracket 49 which is xedly secured to the jib C by a U-bolt 50. When the jib C and arm B are raised orlowered, the belt 27 and its supportin members 40 will swing vertically aroun shaft 29 to cause the discharge end of the belt to maintain its delivery position with respect to the chute b2, which is movable horizontally and vertically with arms B. A baie 51, supported by metallic straps 52 from the rods 44 of the belt carrying members, prevents overflow of the sand from the belt 27 and directs it -downwardly into chute b2, and onto the belt b which delivers sand from said chute to the projector casing. A hopper 54 is supported by straps 55 from members asY 40, so that it will swing vertically with belt 27 and said members. Sand is usually fed into this hopper from an elevator, if the projector is used on a portable truck, or from an overhead delivery, if the projector is of the non-portable type.

In operation, the sand will be fed continuously in regulated quantity from hopper 54 to belt 27 which will discharge it into chute b2 and onto belt b', which will feed thel sand into the high speed projector. The latter is movable connection between` the arm and the jib and also around the axis about which the jib swings, so that the head may be easily moved orizontally around the pivotall to project wads of sand intoall portions of a subjacent flask. When it is desired to raise or lower the projector-head, the bracket 11, which carries the arm B, will be correspondingly raised' or lowered. When this bracket is moved, the jib C, arm B, with the projector-head and its drivin mechanism and the sand feeding belt b and opper b2 will be conjointly shifted, so that their operative relation will be maintained. The shift of jib C will raise or lower the bracket 49 to swing the sand-feeding belt 27 and its sup orting members 40 vertically around sha t 29, so that there will be no substantial change in relationship between the lower end ofthe belt and chute b2 carried by the jib C. The jib C, column 12, supporting bracket 26, with the motor 33, the gearing for driving pulley 28, belt 27 and supporting members 40 andk bracket 49 will all swing together horizontally, so that the sand feed will be continued from hopper 54 to chute b2 in the different horizontal positions of the jib. ,In other words, while the operator manipulates the projector-head horizontall into any of its desired positions, the sandceding means will remain effective to keep the projector continuously supplied with sand.

This construction lexemplifies one in which the projector-head is mounted to be shifted horizontally to project sand into all portions of a flask and is carried by supporting means which is vertically adjustable so the p'rojector-head may be raised and lowered to eifect proper delivery of wads of sand into flasks of substantially different heights and in which the sand-feeding means is adjustable with the projector, so that sand will be supplied to the projector in all of its different vertical positions; also one in which a sandfeeding belt is mounted to swing horizontally and is vertically adjustable with a jib which carries a sand projector.

Power operated mechanism is provided for raising and lowering the projector, its supporting structure and the sand-feeding mechanism. This mechanism comprises an electric motor 58, which is supported on a bracket 59, which is aifixed to jib C by U-bolts 59a; a pinion 60 fixed to the shaft of said motor; a gear 61 Xed to a shaft 62; a worm-wheel 63 fixed to shaft 62; a worm gear 64 driven by said worm-wheel; a shaft 65, to which the wormgear is fixed; a drum 66 flXed'to shaft 65 and a cable 67, which has its upper end anchored, as at 68, to the supporting bracket 26 and is adapted to be wound around and paid out from drum 66. lMotor 58 is of the reversible type, so that the gearing may be operated in opposite directions to wind the cable or to unwind it from the drum 66. Gears 60 and 61 are enclosed in a housing 69, and worm 63 and gear 64 are enclosed in a housing 70. These housings are sectionally formed to providefor ready access to the gearings therein drum 66. through the intermediate reducing gearing, to wind up the cable 67, which will raise the bracket 11, jib C, arm B, projector A and the bracket 49. Bracket 49 will swing the sand-feed belt 27, so thatits lower end will remain in position to discharge sand into the hopper b2, which is movable horizontally and vertically with the arm B. When the projector-head is to be lowered, the motor will be loperated in reverse direction to unwind the cable 67 the extent desired to bring the projector in its desired elevation.

The construction last described exemplifies power-operated mechanism for quickly and conveniently raising and lowering the'proj ector-head and its supporting arm and j ib.

The invention lis not to be understood as restricted to the details set forth, since these may be modiied. within the scope of the appended claims, without departing from the spirit and lscope ofthe'invention.

Having thus described the invention, what we claim as new and des'ire to secure by Letters Patent is:

1. In a machine for making molds the combination of a sand projector, means for supporting the projector comprising a member pivoted t0 swing horizontally, means for adjusting said member vertically to raise and lower the projector comprising a motor, and a mechanically operated conveyor kcarried by and vertically adjustable with said supporting member for feeding sand to the projector.

2. In a machine for making molds, the combination of a sand projector, means for'supporting the projector comprising a member movable horizontally, means for adjusting said member vertically to raise and lower the projector comprising a motor, and means for feeding sand to the projector comprising a belt having one of its ends pivotally supported and its other end vertically movable with the member.

3. In a machine for making molds, the combination of a sand projector, a plurality of members pivoted together and to swing horizontally, said projector being stationarily mounted on one of said members, means for vertically adjusting the other of said mem-` bers to raise and lower the projector, and means for feeding sand to the projector.

4. In a machine for making molds, the combination of a sand projector, a supporting structurecomprising a jib and an arm pivoted to the jib and on which the projector is mounted, said jib and arm being pivoted to swing horizontally and relatively to one another, means for vertically adjusting the jib to raise and lower the projector, and means for feeding sand to the projector comprising a belt having one of its ends pivotally supportedand its other end movable vertical withthe jib and adapted to discharge sand to the arm.

5. In a machine for making molds, rthe' combination ofa sand projector, a supporting structure comprising a jib and an armpivoted to the jib on which the projector is' mounted, the jib and arm being pivoted to swing horizontally and relatively to one another, means for vertically adjusting the jib to raise or lower the projector, and sand fee'ding belts movable horizontally with the arm and jib respectively and vertically adjustable with the structure.

6. In a machine for making molds,-the l combination of a sand projector, a supporting structure comprising a jib and an arm pivoted to the jib on which the projector is mounted, the jib and arm being pivoted to swing horizontallyA and relatively to one another, means to support the structure in 'different vertical positons, means for feeding sand to the projector comprising belts, one of which is mounted on the arm and movable therewith, and the other of which has one of its ends pivotally supported and its other end vertically movable with the j ib and adapted 'to discharge san'd onto the belt carried by the arm.

' 7. In a machine for making molds, the combination of a sand projector, a supporting structure for the projector comprising a jib pivoted to swing horizontally, a column turning with the jib, means for vertically adjusting the j ib on the column to raise or lower the projector, sand feeding means for the projector comprising a driven conveyor belt which has one end pivotally supported on the column to swing horizontally therewith and its other end connected to move vertically with the jib, and means carried by the column for driving the conveyor.

8. In a machine for making molds, the combination of a sand projector, a supporting structure comprising a j ib and an arm pivoted to the jib and on which the projector is mounted, the j ib and arm being pivoted horizontally and relatively to one another, means for vertically adjustingthe jib to raise and lower the projector comprising a motor mounted on the jib, and means for feeding sand to the projector. j

9. In a machine for making molds, the combination of a sand projector, a vertical column, a member slidable on the column and provided with a socket, a supporting structure for the projector comprising a j ib mounted in t-he socket, means for vertically adjusting said structure to raise and lower the projector comprisinga motor, and means for feeding sand to the projector. i

10. In a machine for making molds, the combination of a sand projector, a vertical column, a member slidably mounted on said column and provided with a socket, a structure for supporting the projector comprismg a jib mo nted 1n the socket, means for vertlcally ad]usting said structure to raise o and lower the projector comprisin a. motor f and gearing, a housing for sal gearmg mounted on the memberz and means for feedeeding sand to the pro]ector.

Signed at Chicago, Illinois, this 22nd day 10 of October, 1924.

ELMER O. BEARDSLEY. WALTER F. PIPER.

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