US1119400A - Core-making machine. - Google Patents

Description

B. D. CAPPELL.

GORE MAKING MACHINE.

APPLIOATION FILED MAY 2, 1912.

1,1 1 9,400. Patented Dec. 1, 1914.

3 SHEETSSHIIET 1.

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GORE MAKING MACHINE.

APPLICATION FILED MAY 2, 1012.

1, 1 1 9,400. Patented Dec. 1, 1914.

3 SHEETB SHBET 2.

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MW [A 93 A0 $441061. 5 Le/W W72 1 MMMV.

Patented Dec. 1, 1914.

3 SHEETS-SHEET 3.

Inventor.

Witnesses.

(0 QWn/ BENJAMIN D. CAPPELL, OF OIL CITY, PENNSYLVANIA.

CORE-MAKING MA CHINE.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Application filed May 2, 1912. Serial No. 694,792.

To ail IP/II'JH'L if m (11 concern Be it known that I. BENJAMIN D. Carrr-zrn. a subject of the King of Great Britain. and rc idcnt oi the city of Oil City, in the State of Pennsylvania, in the United States of America, have invented certain new and useful Improvements in Core- Making Machines, as described in the following specification and illustrated in the accompanying drawings, that form partof the same.

The invention consists essentially in the novel construction and arrangement of parts. whereby the sand for forming the core is forced by fluid pressure into the core box held securely on a movable table. in contact with the sand supply casing.

The objects of the invention are, to eil'ect a saving of time in the making of cores. thereby materially reducing the cost of foundry operations. and to devise a strong and duralzlc machine simple in operat on which may be operated very rapidly and which will produce cores of a uniform density at very low cost.

In the drawings, Figure 1 is an elevational part sectional view of a machine constructed in accordance with this invention. Fig. 1 is a perspective detail of the cylinder supporting bracket. Fig. 2 is a top plan view of the machine showing the sand cut off plate in its open position in full lines and closed in dotted lines. Fig. 3 is a side elcvational view of the core clamping cylinder showing the plunger piston and ports in dotted lines, the valve casing being partly broken awav and the controlling valve being shown in three positions. Fig. 3* is a horizontal secti nal view through the valve 30 and a portion of the cylinder wall 21. F ig. 4 is an enlarged perspective view partly in vertical section of the main controlling valve. Fig. 5 is a horizontal sectional view on a reduced scale of the main controlling valve, the valve casing being removed.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings. 1 is the base of the machine having the standards 2 rising from the corners thereof and supporting the top casting 3', said top being in the form of a centrally arranged cylinder 4 open at the top and bottom and having the radial arms 5 extending outwardly to and adjustably supported on the standards 2.

(S is a hollow journal centrally arranged and seemed to the base and having a central circular opening 7 thcrethrough.

8 is a circular block recessed on the underside and journaled on the bearing 6 and resting thereon and having a vertically threaded orifice 9 therethrough.

10 are handles secured to the block 8 and extending radially outward therefrom.

11 is a threaded spindle threaded into the orifice 9 in the block 8 and extending upwardly therethrough and downwardly through the opening 7 in the journal and the base.

12 is a circular casing open at the top and secured to the reduced threaded upper end 13 of the spindle 11.

14 is a spring packing ring arranged in a suitable groove in the periphery of the casing 12 adjacent to the top.

15 is an inverted circular casing closing the top of the casing 12 and having an orifice 16 in the side thereof midway of the depth.

17 is a table rigidly secured to the top of the casing 15 and adapted to engage the standards 2 at the corners and to slide up and .down in contact therewith. The table 17 is raised and lowered by the operation of the threaded block 8 to an approximate position and the telescoping casing members carrying said table are operated by the introduction of a fluid pressure within said casing through a pipe 18, the valve con trolling the flow of pressure to said casings being hereinafter more particularly described.

. 12) is a bracket adjustably secured to the face of the table 17.

90 is the core box clamp adjustably secured to the table 17, said clamp comprising a cylinder '21 horizontally arranged and provided with a valve chamber 22 on one side thereof.

23 is the clamp plunger extending through the packing gland 2i and having a suitable piston secured to the inner end operating within said cylinder.

25 and 26 are inlet passages leading to the opposite ends of the cylinder 21 from the valve chamber and 27 is anexhaust passage arranged intermediately between the terminal inner ends of said inlet passages.

28 is a pipe communicating with the valve chamber and leading from a compressed air supply pipe 29. p I

30 is a flat valve rotatably arranged within the valve chamber at the side of the cylinder 21 and operated by the handle 31 outside of said casing. The "valve 30 is recessed on the underside so that when turned to one of the dotted positions shown, onev of the inlet passages will be cleared so that the air pressure within the valve chamber will flow therethrough, into the cylinder and force the piston outwardly, thus operating the plunger. At the same time the hollow underside of the valve opens a communicating passage between the other inlet port and the exhaust port allowing the pressure at the other end of the cylinder to escape. The

movement of the valve to the other dotted position shows the manner of reversing the movement of the plunger. The plunger is arranged on the table opposite the bracket 19 and the sectional core box is placed on the table and the pneumatic clamp operated to bring the plunger 23 in engagement there with, the air pressure firmly clamping the two portions of the core box together and holding it rigidlv in its position on the table. The core box is thus very securely held and is very quickly secured or relejised. a simple operation of the valve lever being necessary.

32 are horizontal guides parallelly arranged and secured to the underside of the top casting 3 having the inwardly projecting underside lip portions 33.

34 are brackets rigidly secured to the underside of the guides 32 centrally in relation to the top and having the vertical slots 35 therein and the central arched openings 36.

37 is a cylinder loosely suspended from the brackets 34 on the bolts 38 extending through the slots 35, said cylinder being open at the top and closed at the bottom end by the circular plate 39, said plate having a central tapered orifice 40 therein.

41 are orifices formed in the side Walls of the cylinder 37 adiacent to the top andopposite to the arched openings 36 in the brackets 34,- said orifices being arranged in a slightly upward slanting direction.

42 is a pipe branched at the upper end and leading to the orifices 41, said pipe leading from the main air pressure valve which will be further described.

43 is a slide supported in the guides 32 and adapted to be moved back and forth therein having a handle 44 at the front side. The slide 43 is formed with a hole 45 corresponding with the shape of the cylindrical portion 4 of the top 3 and said opening is beveled at on side to form a. cut off edge to shut off the flow of sand.

The sand pot or cylinder 37 is supported .and having a gasket 47 of rubber or other suitable packing material adapted to engage the top edge of said cylinder.

48 is a circular central plate secured to the sliding plate 43.

The cylinder 37 is loosely supported upon the bolts 38 and normally drops below the slide 43 so that the said slide may be operated freely. lVhen the table 17 is raised and the core box'is held therein and forced up against the bottom of the cylinder 37 said cylinder is raised so as to bring the upper edge into contact with the gasket and thus make an airtight ioint.

49 is a flat cylindrical valve casing having an air inlet opening 50 connected with a compressed air supply pipe 29 and a plurality of ports 52, 53 and 54 at the opposite side connected respectively with the pipes 18 and 42 leading to the table and the sand pot and the exhaust pipe 55.

56 is a sector shaped valve arranged within the valve casing and hollow on the underside and adapted to be rotated on the face of the bottom plate of said valve casing to open and close the ports therein. the hollow chamber 57 on the underside of the alve being adapted to communicate with all three of said ports at once.

58 is a spindle connected to the valve 56 and extending upwardly through the packing gland 59. 60 is a lever rigidly connected to said spindle and adapted to engage the stops 61 on said casing to limit the movement thereof.

In the operation of this machine, the parts of the core box are placed together and laid upon the table abutting the bracket 19. The valve of the clamp 20 is then operated to direct a flow of compressed air from the pipe 28 to the .outer end of the cylinder 21, thus causing the plunger 23 to move inwardly and clamp the core box securely against the bracket. The table is then raised by means of the screw block 8 to bring the top of the core box close to or in touch with the bottom plate of the cylinder 37, the top opening in the core 1 easing fed from the supply pipe Qilfjitrithus making the core and the compressed air directed inwardly and upwardly in two opposing jets meets centrally and turns downwardly thereby effecting a central column pressure against the sand within said cylinder and forcing the sand through the orifice in the plate 39 into the core box filling the interior thereof with the sand under a uniform pressure. The air being directed in a vertical, column downwardly insures the perfect operation in filling and a core of uniform vdensity is the result.

When the core box has been filled the lever 60 is operated to turn the valve 56 back to first open the port 53 releasing the pres sure of air in the sand pot and stopping the flow of sand. the exhaust air passing out through the orifices 54 and exhaust pipe 55. A further return movement of the valve 56 opens the port 52 to communication with the exhaust thereby releasing the upward pressure against the table and allowing the cylinder 37 to drop to its lowermost position and withdrawing the core box from contact therewith. The core box is then released by operating the valve 22 directing a flow of compressed air to the inner end of the cylinder 21 causing the plunger to bemoved inwardly, the exhaust escaping through the passage 27. The core box may then be removed and another placed 7 in position upon the table. The supply of sand in the cylinder may be then replenished by the operator drawing the slide 43 outwardly to bring the opening in said slide beneath the opening in the top casting and when the required amount of sand has been received in the said cylinder the slide is returned to its normal closed position.

It will be readily understood from this description that the operation of making cores will be very rapid. entirely dispensing with hand work and further that avery uniform core will be produced very rapidly. Agreat saving oftime and labor is eflected Many of the details of construction in the present device maybe altered considerably without departing from the spirit of the invention. so long as the principal features of forcing the sand intothe core box by fluid pressure and holdingthe core box in contact with the sand supply casing on 6 a movable table is adhered to.

adapted to first open the port to said table,

then open the port to said sand casing, then to connect the sand casing port and the tableport to the exhaust successively.

2. In a core making machine, the combination with a pneumaticaly operated table and a sand casing supported thereabove. of a valve casing connected with a compressed air supply and having separate ports 'communicating with said table and said sand casing and an exhaust port, and a rotary valve adapted to cover all of said ports and formed with a recess in the face covering said ports adapted to form a communicating passage between the table and sand casing ports and the exhaust port.

. 3. In a core making machine, the combination. with a. pneumatically operated table and a sand casing supported thereabove, of a flat cylindrical valve casing connected with a compressed air supply and having ports in one end thereof communicating one with the table, one with the sand casing and one with an, exhaust, and a sector shaped valve rotatably arranged in said casing and adapted to cover said ports. said valve havinga recess in its contacting face adapted to form a communicating passage between the table and sand casing ports-and the exhaust. y

4. In a core making machine, a frame. a ho per supported on said frame. a vertically adjustable sand casing looselv suspended below and separate from said hopper. a valve slidahlv arranged'to close the bottom of said ho per, a. verticallv movable t ble arranged below said sand casing. and means for operating said table to raisev said sand casing.

5. In a core making machine, a frame, a hopper carried on the top of said frame, a horizontal slide closing said hopper, a sand cvlinder open at the top andlooselv suspended from said frame beneath said slide, said cylinderhaving inlet ports in the side walls adjacent. to the top and sloping inwardlv and upwardlv, an air supply pipe connected to'said ports. means for directing a flow of com ressed air through said supplvpipe. a table arranged below said cvl-' inder and adapted to be adjusted verticallv. anil means for holding the core box on said ta e.

6. In a device of the class described in combination, a base. a frame rising from said base the top of said frame having a sand supply opening therein, a, valve adapted to open and close saidsand opening, a cylinder loosely supported beneath said slide and having a discharge opening in the bot- 7 the flow of air to said cylinders.

7; In a core making machine, a frame, a, sand casing supported from the top of said frame, and having a discharge opening in the bottom, an adjustable table arranged be: low said casing, means for forcing the sand through ,the discharge in said casing, a

bracket rigidly secured to said table, a hori-- zontally arranged cylinder secured to said table, a piston 'in said cylinder having a plunger extending toward said bracket, a valve chamber on the side of said cylinder connected with a compressed air supply, and a valve adapted-to-control the air supply to said cylinder to control the movement of the plunger. I

8; In a core making machine, a frame, a sand, casing supported from the top of said frame, and having a discharge opening in the bottom, an adjustable table arranged below said casing. means for forcing the sand through the discharge in said casing, a bracket rigidly secured to said table. a horizontally arranged cylinder secured to said mia'aoo table, having a valve chamber on the side thereof and passages leading from the valve chamber to the ends of the cylinder and an ekhaust passage, a rotary valve a1 ranged m 40 said casing adapted to open either of the end passages to the valve chamber simultaneously opening the opposite passage to the zontally arranged cylinder secured to said table having a valve chamber on the side thereof and passages leading from the valve chamber to the ends of the cylinder and an exhaust passage, a rotary valve arranged in said casing having a recess in the underside adapted to open communication between either of the end passages and the exhaust simultaneously with the opening of the other port to the valve chamber, a'piston in the cylinder, and a plunger secured to the piston and projecting through the cylinder head.

I Signed at Oil City, Pa, U. S. A. this 17th day of April, 1912. BENJAMIN D. GAPPELL. "Witnesses:

, Geo. W. lWoRoAN,

Aiwnnw NICK;

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