US822978A - Mold. - Google Patents

Description

PATENTED JUNE 12, 1906.

J. OLIVER.

MOLD.

APPLIGATION FILED SEPT. 15. 1905.

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- PATENTED JUNE 12, 1906.

J. OLIVER.

MOLD.

APPLICATION FILED SEPT.15. 1905.

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UNITED STATES PATENT OFFICE.

JAMES OLIVER, OF SOUTH BEND, INDIANA, ASSIGNOR TO OLIVER OHILLED PLOW WORKS, OF SOUTH BEND, INDIANA.

MOLD.

Specification of Letters Patent.

Patented June 12, 1906.

Application filed September 15. 1905. Serial No. 278,661.

To all whom it may concern.-

. Be it known that I, JAMES OLIVER, a resident of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Molds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in molds, and more particularly to an im roved mold for chilling the wearing-face o plowmoldboards and the like, the object of the invention being to cast the moldboard with a perfectly-smooth hard wearing-face entirely free from sand-holes and other imperfections.

The least imperfection in the face side of the moldboard is detrimental, for the reason that the soil will stick at such places and prevent the plow from doing perfect work. Many attempts have been made to construct moldboard-chills which would produce good clean plow-moldboards, none of which have proven to be entirely satisfactory. The usual plan heretofore practiced was to locate the chill on the top side of the sand-mold, and the moldboard was cast with its face up. In such cases the dirt or sand which would enter the mold along with the iron would flow to the top and come into contact with the face of the chill, and the result was sand or dirt holes in the working surface of the board. With my improved chill the metal is poured on top of the chill and not under, as was the usual practice.

A further advantage in my chill is that it is not required to roll or turn the mold over when making same.

Another advantage is that a follow-board is not required, for the reason that the moldboard-pattern rests on the chill while the sand is bein rammed in the cope, and the chill takes the place of the usual follow-board.

With these objects in view the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view illustrating my improvements. Fig. 2 is a view in longitudinal section. Fig. 3 1s a view in cross-section on the line a: a: of Fig.

2, and Fig. 4 is a view in cross-section on the line y y of Fig. 2.

The chill 1 forms the lower part of the mold and comprises a water-tight chamber, the top plate of which conforms to the surface formation of the moldboard to be cast and is secured at its edges to the bottom plate by bolts 2, with suitable packing between the edges of the plates to render the chamber water-tight. The back or bottom plate of the chill takes the form of the face of the chill, leaving a substantially even body of water in the chill-cavity. In this way less water is required than in the usual form of chill. The cavity in the chill is preferably made to hold just the required amount of water, and the handling of an excess of water is avoided. One end of the chill 1 is supported on feet 8, and this higher end is provided with an L-joint inlet 4 for water, said joint being sufficiently elevated to insure the chamber being entirely filled with water.

The flask or cope 5 is open and conforms to the shape of the moldboard to be cast, but is larger, so as to permit the sand to be packed all around the ed es of the pattern, and this flask is providec with removable or separable hinge connection 6 at one side with the chill portion 1, so as to permit the flask to be swung up without lifting it entirely from the chill, and a suitable handhold or handle 7 is provided at the opposite side of the flask, as shown.

The operation is as follows: The moldboard-pattern is first placed face down on the chill 1 with the flask resting on the chill all around the pattern. The gate 8 and spruepin 9 are then placed in position at the lower end of the chill, and the flask is rammed full of sand, and the sprue-pin is removed. The flask or cope is then swung back on its hinges and the pattern and gate removed, when the flask is lowered on the chill. The chamber in the chill is filled with water through the L- joint pipe. Hot water is used when the temperature is low for the purpose of warming the chill. During warm weather cold water will answer. The object of the water is to prevent the chill from being heated too rapidly when the metal is being poured on the chill. The hot water warms the chill, which causes the molten metal to lie to the surface of the chill and insures a smooth chilled surface on the moldboard. As stated above, one end of the chill is higher than the other, and the metal poured in at the lower end of the chill flows up on the chill in a solid body, and any dross, dirt, or detached particles of sand will flow to the top and away from the chill, which insures a perfectly clean working surface to the moldboard, which is the object of my invention.

Slight changes might be made in the general form and arrangement of the parts de scribed without departing from my invention, and hence I do not restrict myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A mold for metal castings comprising a hollow metal chill, means for supporting the same in a position slightly inclined to the horizontal, means for introducing liquid into the chill, a flask mounted on top of said chill, and means permitting the introduction of molten metal into the lower portion of the mold, whereby said metal is caused to flow upwardly over the face of the chill and prevent the deposition of sand particles between the face of the chill and the casting.

2. A mold comprising a chill having a chamber permitting an a proximately uniform depth of chilling me( ium under the top face of the chill, a flask mounted on top of the chill, means for supporting the mold in a position slightly inclined to the horizontal, and means permitting the introduction of metal at a low portion of the mold.

3. A mold comprising a metal plate having a compartment in its bottom, a plate tightly closing said bottom, means for introducing a fluid chilling medium into said compartment, a flask mounted upon said plate, means for supporting the mold in a position slightly inclined to the horizontal, and means permitting the introduction of molten metal into the lower portion of the mold.

4. A mold for metal castings, comprising a lower chill supported in a position slightly inclined to the horizontal, means permitting the introduction of metal into the lower end of the mold and an upper sand-flask mounted on top of the inclined chill and hinged thereto.

5. A mold for plow-moldboards, comprising a lower chill supported in a position slightly inclined to the horizontal and comprising a waterchamber, a pipe admitting water to the upper end of the chamber, a flask on top of the chill and conforming in outline to the moldboard to be cast yet larger to admit sand all around the pattern, and said flask constructed to receive the gate and sprue-pin at the lower end of the inclined chill.

6. Amold for plow-moldboards, comprising a lower chill supported in a position slightly inclined to the horizontal and consisting of a waterchamber having a water-inlet L- joint pipe at its highest end, an open flask having hinge connection at one side with the chill and provided with a handle at its opposite side, and said chill and flask constructed to receive the gate and sprue-pin at the lowest point of the inclined pattern.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JAMES OLIVER.

Witnesses:

EDWIN NICAR, H. GAIL DAVIS.

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