US720408A

US720408A - Molding apparatus.

Info

Publication number: US720408A
Application number: US12689502A
Authority: US
Inventors: Edwin Cross
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-10-11
Filing date: 1902-10-11
Publication date: 1903-02-10
Anticipated expiration: 1920-02-10

Description

No; 720,408. PATENTED FEB. 10,1903.

E. (moss. MOLDING APPARATUS.

\ APPLICATION FILED OCT. 11, 1902. N0 MODEL. 2 SHEETS-SHEET'I.

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E. GROSS. MOLDING APPARATUS.

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UNITED STATES PATENT 7 O CE.

- EDWIN onoss', or URNHAM, rENusYLvANIA. f

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. .7 20,408, datedEebruary 10, 1903.

1 Application filecl October 11, 1 902. SerialNo. 126,895. (No model) To all whom, it may concern;

Be it known that I, EDWIN CROSS, a citizen of the United States, residing at Burnham, in the county of Miftlin and State of Pennsylvania,have invented new and useful Improvements in Molding Apparatus, of which the following is a specification.

This invention relates to a molding apparatus; and the object of the invention is to provide an efficient: device of this character 7 for'rapidly handling trucks or carriages sup-- porting the fiasks the tracks upon which the trucks or carriages travel being so constructed that they cannotbe'come clogged with sand, to thereby interfere with the proper propulsion of said trucks. 'In the present case the I track upon which the trucks travel has a movable section, and this movable section is preferably arranged j, for vertical movement, so that'a truck carried thereby can be ele vated to the rammer, by virtue of which the sand 'n the flask can be more uniformly pack (1 or rammed. By reason, also, of this feature the journals of the truck can extend beyond the movable tracksection, so as to not receive thestress of the ramming operation. I prefer to make the track of annular form, by reason of .which I am enabled to simultaneously handle a large number of trucks-six, for example--a man to each truck,

so that the ramming operation can be made practically a continuous one. The rails con stituting the track arepf peculiar construe tion, they being of channeled or grooved form to receive the correspondingly 'or substan tially correspondingly shapedperipheries of the wheels of the respective trucks, and the channels have openings for the escape of sand that may fall thcreinto during the packing of the flasks by the attendants, the openings being in the present instance at or along the bottoms of the rails. The ties that sustain the rails at points below the'openings in the latter are oflwedge or knife-edge f0rm,so that the accumulation of sand at these points is not possible. The rails may be made of segments suitably united together and easily and inexpensively produced by casting. The

annular track, of course, may be of a size that can best be accommodated in the shop or foundry inwhich it is installed.

The invention is-clcarly illustrated in the spaced apart a suitable distance.

accompanyingdrawings,formingapartofthis specification, and in whichr Figure 1 is a plan View of amolding appa- Like characters refer to likeparts in the several figures.

While the invention is not limited to the shaping of the track in any particular mannor, it is illustrated ,and will be hereinafter described'as beingof annular form, the same being upheld by the foundation 2 of a shape corresponding with the track and sunk into I the floor with its upper face substantially level with said floor. The foundation, it'will be understood, is of a form corresponding with the track, and uponits upper face at suitable intervals are laid the ties 3,'ofany suitable material. They may be of. wood or cast metal. and they are arranged concentrically and are The rails consist of segments 5, which may be in the form of castings, and each segment, it will be seen, consists of two wings or cheeks arranged a little less than a right angle to each 'other and'resting upon the ties 3. In other words, the segments are substantially V-shaped in cross-section. or checks of the respective segments are separated,-except for the verynarrow web 6 along It will be seen that the wings.

The rails are each denoted by 4:,

their lower edges, to provide openings 7 for v the escape of sand that might fall into the segments during the packing of flasks mounted upon trucks adapted to travel on the track. The webs 6, it will be seen, are of wedgeform, their apexes being uppermost, so that they are adapted to'shed any sand that may fall thereonto. The segments terminate upon their lower outer sides in lateral ears 8, through which bolts or similar fastening devices Q'car: pass, said bolts being adaptedto be connected in some suitable manner to the roe 3 it will be seen that the segments of the re-' spective tracks abut each other and at their endaare provided with ears or lugs to receive bolts, rivets, or otherfastening devices by which the said segments can be rigidly connected together to form, in effect, unitary rails. It will be seen, therefore, that the track comprises two annular rails, one arranged within the other, and upon which trucks or carriages can travel and which are of grooved form and have openings in their bottoms for the escape of sand that may fall off the trucks while the flasks thereon are being packed. The ties have wedge or knife-edge portions 11, the apexes of which are arranged under the openings 7, it being understood that the upper or beveled edges of said wedges extend transversely of said openings, by reason of which the sand after it passes through said openings cannot accumulate upon the ties, the inclined sides of the said wedges preventing such result. The trucks which travel upon the'tracks are denoted by 12, and they include bodies of a size suitable to accommodate a flask and its appurtenances and provided with projecting arms 13, in which the wheels 14 are journaled. It will be seen that the peripheries of the wheels are shaped to agree with the roove or channel of the rails 4, so that any sand falling upon the said peripheries cannot lodge thereon, but drops fromthe same into the channels andfrom thence through the openings 7.

The track includes a movable section 15,

which in the present case is mounted for rising-and-falling movement, so that the flask carried by the track thereon can be elevated by 'suitable power to the rammer head or block for the purpose of packing the sand in said flask, and the movable section 15 of the track is of such length that the wheels 14, or

rather the journals of -said wheels, project be-' yond the movable section or platform, so that when the latter is elevated to ram the sand in the flask the pressure due to the ramming operation cannot be possibly transmitted to said journals. The movable section or platform 15 of the track has upon its under side the depending plunger orpiston 15, fitted into the cylinder 16 and adapted to vertically travel therein. An inlet-pipe 16 for compressed air or other motive agent leads into said cylinder 16 for the purpose of supplying compressed air or its equivalent thereto in order to elevate the plunger, and consequently the track section or platform 15. Whenthe latter is elevated, the flask upon the truck is carried to the rammer-block 19 upon the cross-piece 18 to compress the sand -in the flask. The ram mer-block 19 is secured consequently the truck carried thereby.

The track is adapted to support a large number of trucks. very conveniently handled, one operator performing one operation while the others are performing other operations, and duri ngthis time the ramming mechanism can e working, so that the ramming operation is practically a continuous one, and by reason of the construction of the track the same cannot possibly be clogged with sand used in packing the flasks.

It will be remembered that the track upon which the trucks travel is of annular form. This is particularly advantageous, as the trucks always move in the same direction and not forward and then backward, as is the case with a straight track or one of a similar nature. By making the track annulara number of trucks can be used. At the commencement of operation an empty flask will be placed by an operator on a truck and the latter advanced to a second operator, who puts facing-sand in the flask. The second operator then advances the truck to a third operator, who fills the flask with heap or common sand and then advances the truck to a fourth operator, who places the ramming-board on top of the flask and advances the truck to a fifth operator, who positions the truck with its flask on the movable track-section, so that the latter can be elevated to effect the ramming of the contents of the flask. hen the ramming operation is concluded, the movable track-section will be lowered and the truck moved off said movable track-section, so that the flask and its contents can be taken therefrom, after which the truck will be moved empty to the first operator. The operation described is practically a continuous As many as six can be one, and a large number of tlllCkS.-Sa.y sixcan be simultaneously handled.

From the preceding description it will be understood that my improved molding apparatusincludes the combination, with a fixed rammer, ot a track having a section movable toward said rammer, so that the flask-carrying truck upon said movable track-section can be carried toward the ramlner to thereby bring the flask on said truck against the rammer in order to pack the sand therein in a dense uniform condition.

The apparatus is comparatively simple. It can be readily and inexpensively assembled and can be made of a size to suit that of the shop or foundry in which it is installed.

The invention is'in no wise limited to the foregoing construction and to the formation of any of the parts of any particular material.

Having described the invention, what 'I claim istrack-section, and a truck provided with roll-' ers journaled at its ends, to travel on the track, and said journals being arranged to extend outward beyond the opposite sides of said movable track-section when the truck thereon is elevated.

2. In a molding apparatus, a rail consisting of two sections separated at their lower edges and diverging from each other toward their upper edges and narrow webs uniting said sections in proximity to their lower edges to thereby hold said sections in proper relation with each other.

3. In a molding apparatus a rail consisting of two sections separated at their lower edges and'diverging from each other toward their upper edges and narrow, wedge-shaped webs uniting said sections in proximity to their loweredges to hold them in proper relation to each other.

4. In a molding apparatus, the combination of a rammer, a track having grooved rails each rail having an opening in its hottom for the escape of sand, and ties for supporting the rails each tie having wedge-shaped portions arranged under the openings and the apexes of said wedge-shaped portions be ing up. Y

5. In a molding apparatus, the combination of a rammer, an annular track consisting of grooved rails having openings in their bottoms, and said track having a section movable toward said rammer, and a truck having wheels the peripheries of which are shaped to agree with and to fit into the grooves of said rails.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDWIN CROSS.

Witnesses:

JOHN WELLATT, WALTER I. MINNICK.