US854690A - Molding-machine. - Google Patents

Description

No. 854,690. PATENTBD MAY 21, 1907.

B. L. DAWES & J. P. WHITEHEAD.

MOLDING MACHINE;

APPLIOATION FILED DBO. 2, 1903.

7 SHEETS-SHEET 1.

No. 854,690. I PATENTED MAY 21 1907. B. L. DAWES & J. P.'WHITEHEAD. MOLDING MACHINE.

APPLICATION FILED DEC. 2, 1903.

7 SHEETS-SHEET 2.

FIG. 2.

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PATENTED MAY 21, 1907. E. L. DAWES & J. F- WHITEHBAD.

MOLDING MACHINE.

APPLICATION FILED DEC. 2, 1903.

7 SHEETS-SHEET 3.

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Wtmaooeo No. 854,690. PATENTED MAY 21, 1907. E. L. DAWES & J. F. WHITBHEAD.

MOLDING MAGHINE. APPLICATION FILED DEC. 2, 19 03.

7 SHEETS-SHEET 4.

' FIG. 5.

Qxhimeoom No. 854,690. PATENTED MAY 21, 1907.

B. L. DAWES & .J. F. WHITEHEAD.

MOLDING MACHINE.

APPLICATION 21mm DEC. 2, 1903.

7 SHEETS-SHEET 5.

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Fig.6;

Illll ILII FIG. 9.

v Witnesses attozweq PATENTED MAY 21 E. L. DAWES & J. F. WHITEHEAD.

MOLDING MACHINE. APPLICATION FILED D30. 2, 1903.

7 SHEETS-SHEET 6.

(v m w m 8 'PLTENTFD MAY 21, 1907. E. L. DAWES & J. P. WHITEHEAD.

MOLDING MACHINE. APPLICATION FILED mm. 2, 1903.

7 SHEBTS SHEET 7' mill FIG-412.

witnesses J0 gwuanfow a/rm. OZ

awe-snug EDWARD L. DAVVES AND JOHN F. WHITEHEAD, OF NEW BRIGHTON PEN N SYLVANLA, ASSIGNORS TO STANDARD SANITARY MAN UFACTURIN G- COMPANY, OF PITTSBURG, PENNSYLVANIA.

MOLDING-MACHINE.

Specification of Letters Patent.

' Patented May 21, 1907.

.To all whom, it may concern:

Be it known'that we, EDWARD L. DAWES and JOHN F. WHITEHEAD, of N ew Brighton,

. county of Beaver, and State of Pennsylvania,

have invented certain new. and useful Improvements in Molding-Machines and we do hereby declare the following to be a full and clear description thereof. Our invention relates to molding machines.

The Ob ectof the invention-is to mold in sand various articles of metal. For this purpose the fla'sk is reciprocated vertically While the sand is falling in the flask. Provision is made fora-very rapid vertical reciprocation of the flask and for a variation in the degree ofreciprocation, among the more important features of invention.

With these objects in view our invention consists in the following construction and combination of parts, the details of which will first be fully described, and the features of novelty then set forth and claimed.

Figure 1 represents a side elevation of an apparatus to which we have applied our improvements. frame which supports the flask carrying plate with the'parts located thereon. Fig. 3 is an end view of said 'frame. Fig. 4 is a longitudinal central section of the flask plate agitating cylinder and its connections. Fig. 5 is a partial plan and a partial horizontal sectional view of said cylinder. 6 is a partial side elevation and partial vertical section through certain portions of the connections of the cylinder. Fig. 7 is a top plan view of the flask carrying plate having applied thereto a flask, A a stripping plate and a patterntoillustrate the operation of the machine. Fig. 8 is a central transverse section of the same taken through Fig. 7. Fig. 9 is a side view of'the suspended sand box. 10 is a top ,plan View with the wire bottom removed. Fig. 11 is an end view showing the openings or win s in the sand box closed. .Fig. 12 is a simi ar view showing the wings opened or dropped.

In the drawings, 1 represents a flask supporting plate supported substantially level with the floor 2 of the plant. This plate 1 is rapidly agitated by a cylinder by a vertical reciprocating motion. .While the flask is being thus reciprocated, sand from a sand box 4 is deposited thereon. The frame or sup- Fig. 2 is a top plan view of the a port for'the plate 1 consists of a bed-plate 5 upon which are mounted a series of vertical I frames 6, the upper edges of which are faced with cushions 7 of Babbitt or other similar soft metal. In case of any inequality in the plane of the cushions the soft metal soon wears down to an absolutely even bearing. The

a impact of the flask carrying plate 1 in its vertical jarring movements is received by the I soft metal projections 7.

8 are a series of props secured to the oscillating rods 9 in the frames 6, and 10 is a rod for oscillating the props, which is connected to the oscillating rods 9 by means of levers 11. By this means the props 8 are oscillated from a horizontal to a vertical position, in which latter position they serve to support the stripping plate 38 and its flask when the plate 1 andits pattern are lowered to permit the mold to be lifted from the machine.

Central of the supporting frames is located the neumatic cylinder 3 for reciprocating the flask carrying plate.

12 is the piston.

The cylinder 3 is closed at its lower end by a plate 13 and open at its upper end.

The piston 12 is preferably formed of an elongated hollow casting serving for the purpose of guiding the movement of the piston. The upper ortion of the piston is provided with a tubu ar socket within which is screwed or otherwise secured atube 14, which tube preferably of heavy material to provide is against fracture. tube 14 is bolted or otherwise secured the flask supporting reciprocating plate 1 so that the said plate partakes of the movement of the piston.

The valve apparatus for actuating the piston 12 is carried by the plate 13 on the foun- To the upper portion of dation plate 5, 15 being the inlet pipe leading I co a piston 26 operating in an auxiliary cylinder 27. Intermediate of the connection of the valve stem 25, with the valve 24 and the auxiliary piston 26 is a bell-crank lever 28 provided at 29 with a pivotal connection therewith. This bell-crank lever is prefer ably journaled at 31 to projections formed on the upper outer side of the cylinder 3, the upper short arm 32 of which is adapted to be operated by a projection 33 connected to the flask carrying plate 1 as the latter descends.

In the side of the cylinder 3 next the auxiliary cylinder 27 are a series of lateral'passages 34. The cylinder 27 is bolted air-tight to the side of the cylinder 3 and between the same is arranged a sliding plate 35 having a passage 36 therethrough which is adapted to register with anyone of the lateral openings 34, the interior of the cylinder 27 communicating freely with the cylinder 3 through any one of the passages 34 which is in register with the passage 36 on the slide 35 and which the piston-12-of the cylinder 3 uncovers.

37 is the exhaust passage from the auxiliary cylinder 27 communicating with the outer air when uncovered by the auxiliary piston 26.

The steam passage 23, ports 17',- 18 and 19 and passages 34 and 36v are elongated, while narrow in vertical section, in order to give ainple passage to the operating fluid.

I The flask upporting plate 1 which is, in

this instance, substantially level with the floor' may be of any particular shape according to the particular casting to bemade. In

this instance we have'shown the flask sup-- porting plate 1 adapted more particularly for the casting of bath tubs, it bein understood, however, that we, do not 00 e ourselves to the casting of any particular article by the machine.

In the casting of roll rim bath tubs, we provide the plate 1 with a strippingplate 38 which embraces the lower outer edges of the pattern 39 of the tubto be molded.

40 is the flask mounted upon the stripping plate within which the pattern rests, the flask and stripping plate being held in place by pins 41 and lugs 42 on the sides of the flask, stripping plate and flask supporting late. It will notbenecessary to illustrate any further the method of casting an article such as a bath tub, the operation being the usual one and well'known, except in so far as it is necessary in order to set forththe 'patentable features of this machine.

Above the flask is a sand box or hopper 42' containing a sufficient quantity of sand to fill the flask and its cope or drag during the operation of reciprocating or jarring the flask. The hopper 42 with the sifter- 4 is adapted to be moved above and away from the flask. In the drawings the hopper 42 and the sifter are shown mounted u on an oscillating. support 43 which permits t e hopthe way. The

about 130 times per and sifter to be' swun'gfor rotated sidewise away necessary in order that the mold or flask may be lifted from the flask supporting plate 1 by means of attachments secured thereto and connected with the crane 44-for hoisting and moving the same. The sifter 4 is hun below the hopper 42 from the jib 45 b mks 47,, and the means for agitating the si ter, as cylinder piston 46, are securedto the rotatable support 43 which permits the whole sanding apparatus to be bodily swun out of sifter box 4 is vibrate bodily upon the links 47' by the cylinder 46. The sifter 4 is provided with a sieve 48 and beneath the sieve is a series of pivoted wings '49 secured to bearings 50. The bearings of from the topof the flask.- This is i these wings'are .connected by levers 51 and links 52 whereby they may be simultaneously operated by a lever 53 operated by a pull-rod 54... a

When the wings 49 are horizontal, the bottom of the sifting 'boxis closed, in which position the locking lever 55 pivoted at 56 enga es the levers and links 51 and 52 and ho ds the same in a closed position. When it is desired to drop or open the wings 49, the pull-rod 57 of the lever 55 is operated, which releases the lever. 55 from the link mechanism of'the wings and allows the same to drop or open. I

The operatlon' of the jarring or agitating cylinder is entirely-automat1c.' When the inlet valve-is o ened, the air flows throughthe ports 17 an ports 22 to the under side of the piston 12 through .the passage 23. The piston then. rises until it uncovers the particular passage or port 34 which is in register with the port or passage 36in the adjustable foo slide 35. When that degree of upward log movement is reached, the air flows through the passages 34 and 36 into the auxiliary cylinder 27 and forces the auxiliary piston 26 I outwardly until the exhaust port 37 therein.

is uncovered. This outward movement of I the piston 26 and the valve stem 25 has shifted the main valve so that it has closed the inlet port 17 and opened communication with passa e 23 and the exhaust port 19 leading to t e outer air. The piston 12 then falls rapidly under the escaping air. Just before the piston 12 reaches the bottom of the cylinder 3, the projection 33 on the flask carrying plate 1 comes in contact with the short arm 32 of the bell-crank'lever 28, which being connected to the valve-"stem shifts valve 24 inwardly or toward the large 'oylin-j der, thereby cutting off communication be tween the cylinder and the exhaust and, again opening communication with the inlet It will be'seen 1 I 2 5 pipeand the c linder,'when*the operation is .The oscillation of this cyl-. With a pressure of on will'reciprocate 1 3O except that shown in register therewith in Fig. 4 of the drawings, the degree of the reciprocation of the flask carrying plate will vary, the stroke of the piston 12 being sub stantially the same as the distance'between the lower end of the cylinder 3 and the particular passa e 34 in register with the passage 26 of the p ate 35. This rapid degree of reciprocation of the flask over anything hitherto accomplished in sand molding machines is accompanied by an increased degree of compactness and uniformity of ramming of the mold. impossible to attain under the comparatively slow manipulation of the present mechanically operated jarring means.

The compactness and evenness with which the sand is rammed is also due in large meas* ure to the continuous feeding of the sand to the mold during the ramming operation, instead of, as is usual, filling the flask and .the superimposed sand box with sand before jarring the same.

It will be noted, referring specially to Fig. 10, that the wings or gates 49 cover only a portion of the sifting box. In molding a bath tub or any other article in which the pattern is disposed centrally of the mold, it is desirable to pack the sides of the mold around the'pattern first before coverin up the pattern and packing the entire top 0 the mold. By arranging the wings 49 as shown, sand is deposited through the outer edges of the box 4 down and around the sides of the flask below the box during the compacting operation, and after the sand is packed to a level with the top of the pattern, the wings 49 are then dropped .or opened permitting the sand accumulated thereon to fall on the top of the pattern, after which the sand sifts through the box evenly throughout the area of the same. The peculiar construction of this sifter makes it possible to feed sand continually to the mold during the jarring movement of the flask and secure the improved results before referred to. I

The area covered by the win s 49-and their particular disposition upon t 1e bottom ofthe sifter will be governed by the shape of the particular pattern to be molded and cast, it being understood that the Wings may cover or uncover different areas of the sifting box.

The oscillating props 8 when arranged ver-, tically, engage projections 60 on the stripping plate-38 and serve LO elevate the plate and the flask while the pattern, as 39, and the plate 1 are being lowered from the mold.

For the purpose of guiding the movement of'the piston and the cylinder and the flask carrying plate 1 in their movements, we provide a series of angle-iron guide posts 51 Which embrace the corners of the plate 1 and regulate its vertical movement. I I i While we have referred to the cylinder 3 as a' pneumatic cylinder, it will be understood that the cylinder may be operated by any other fluid supply such as steam, water, gas or the like.

In operation the hopper 42 is swung over the flask and discharged therein, and while the jolting or jarring operation is being erformed the hopperis returned and reled so that no time is lost.

It is common to jolt a pattern plate or table by means of a vertical post or standard disposed centrally thereunder, the post to receive the impact in arresting the downward jolt of the table. WVe have found that where the olt of the table is received upon a central post beneath the pattern plate that there is liability of breaking the pattern, pattern plate, stripping plate or flask. Especially when heavy moldings are made, is this liability to fracture imminent. To avoid this defect we have arranged a stop extending in a series of contacts, such as 7, over a considerable zone about the jolting cylinder so as to take up this strain. These stops 7 may be arranged as shown in Fig. 2, or they may be disposed in circular rim oIj-other approved W8, l

The drawings which we have used to illustrate this invention exemplify only one form and manner of carrying out our invention. It will be understood that the invention is not limited to the particular details shown by the drawings, but that the inventive act contemplates all variations in the particular embodiment of the invention which may be included under the following claims.

What we claim is:

1. The combination in a molding machine, of a reciprocating mold late, a main cylinder and piston for operating the same, a valve mechanism for actuating the piston, an auxiliary cylinder and piston, and means for con, necting the reciprocating plate and main and auxiliary pistons for automatically actuating the same.

2. The combination in a molding machine, of a reciprocating mold plate, a main cylinder and piston for operating the same, avalve mechanism for actuating the piston, an auxiliary cylinder and piston, a series of connections between the two cylinders, means for opening up any one of said connections, and

means for connecting the reciprocating plate and main and auxiliary pistons for automatically actuating the same.

3. In a molding machine, the combination of a main cylinder and piston, an auxiliary cylinder and piston,-a valve mechanism connecting both pistons, a reciprocating mold plate, a rod connecting said valve and the auxiliary piston, and a lever connection between the mold plate and said rod.

' 4. In a molding machine, the combination of a pattern plate, means for jolting said plate, and an anvil frame below the pattern plate having points thereon.

of a cylinder, and an anvil frame having multiple soft metal contact points disposed at the sides of the cylinder.

6. In a molding machine the combination of, a main cylinder and piston, an auxiliary cylinder and piston; said cylinders being connected by a series of fluid passages, means for connecting any one of'said fluid-passa es and cutting out the others, a valve, mechanism connecting both' pistons, .a reciprocating mold plate, arod conn'ectin said valve -and the auxiliary piston, and a ever connection 5. In a molding machine, the combination" a between the mold plate and said, rod.

7. In a molding machine the combination of a frame, a mold plate, means for reciproeating the mold plate, a flask upon the. mold plate, a hopper and sifter above the mold plate, a swmgin jib supporting the hopper and sifter and a apted to swing the latter to and away from above the flask, and a traveling crane adapted to handle'the flask. 1 8. The combination in a molding machine, 4

' ot a reciprocating mold plate, a main cylinder and piston for operating the same, a

I valve mechanism for actuating the piston, an

auxiliary cylinder and piston having a port multiple soft metal contact' controlled by said iston, means connecting the reciprocating p ate and. main and auxiliary pistons, and multiple ports connecting the main and auxiliary piston.

9. The combination in a molding machine,

valve mechanism for actuating the Piston, an auxiliary cylinder and piston, means connecting the reciprocating plate and main and auxiliary'pistons, multiple ports connecting the main and auxiliary pistons, and means for controlling the passages in said ports.

10. The combination in a molding machine, of a reciprocating mold-plate, 'a main cylinder and piston for operating the same, a

. valve mechanism for actuating the piston, an

-of a reciprocating mold-plate, a main cyl1n-- der and piston for operating the same, a

auxiliary cylinder and piston having :a port I coiitrolled by said piston, and means for connecting the reciprocating plate and main and thesame.

In, testimony whereof We aflix our signatures. I I

E. DAWESJ g JOHN F. W'HlTEHEAD.

Witnesses: 3

" E. R. FRENcH,

' F. T. DAWES.

so auxiliary piston forautomatically actuating

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