US318783A - Matthew b - Google Patents

Description

(No Model.)

M. R. MOORE.

APPARATUS FOR MAKING SAND MOLDS. No. 318,783. Patented May 26, 1885.

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h-IATTH-EIV It. MOORE, OF INDIANAPOLIS, INDIANA.

APPARATUSFOR MAKING SAND MOLDS.

SPECIFEUATIOE part of Letters Patent Id'o. 318,783, dated May 26, 1885.

Application filed January 16, 1885. (No model.)

To aZZ whom it may concern:

Be it known that I, llIATTHEW B. Moons, of Indianapolis, Marion county, in the State of Indiana, have invented a new and useful Improvement in Apparatus for Making Sand Molds for use in Casting Iron and other Metals; and I do hereby declare that the following is such a full, clear, and exact description of the same as will enable any person skilled in the art to which it pertains to understand, construct, and use the said invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to casting in green sand, and I shall use the word sand to indicate the proper mixture of dampened earth usually employed in this art. I use the mode of operation usually employed with molding machines, and sometimes in hand-molding, wherein the patterns proper are fixed upon a pattern-plate, with mechanism for moving it up and down, there being provided another plate in which are holes corresponding in outline with the patterns, through which holes the patterns may be thrust or partially thrust. The flask is placed on the latter plate, the pattern-plate, with its attached patterns, brought up to thrust the patterns properly up through the holes,and the sand applied and compressed upon and around the pattern. Then the pattern-plate is carefully lowered. The plate with holes sustains the sand of the mold while the patterns are being drawn downward. It prevents the adhesion of the sand to the pattern from breaking down the mold.

The plate with holes has received several technical appellations, as templetplate, stripper-plate, 85c; but as an appropriate title, and particularly to distinguish it from other parts, I will herein call it the silhouette. The construction of this plate (the silhouette) is the subject of the present improvement.

I have discovered and reduced to practice a way of making the silhouette which renders it much cheaper and easier to manufacture, better adapted to its purpose, and more easy to repair in case of wear from use.

It has been before proposed to make the holes too large and to line them with soft metal cast in place; but the means heretofore known for holding such soft margin in place were insufficient. I have devised a modification which insures against the liability of the soft lining to be forced downward. It is always in the downward direction that the most severe forces are received; in fact, it is only in that direction that any force is received when the parts are in use.

The accompanying drawings form a part of this specification, and represent what I consider the best means of carrying out the invention as applied to the casting of four elbows for steam or gas fittings.

Figure l is a plan view of the silhouette with the patterns in place. Fig. 2 is a corresponding elevation. Fig. 3 is a vertical section on the line a: in Fig. 1. Fig. 4; is a section of a portion corresponding to Fig. 3, showing the pattern and its supporting-plate 0r patteruplate lowered. Fig. 5 is a plan view of a portion of the silhouette alone, the pattern being removed.

Similar letters of reference indicate like parts in all the figures where they occur.

In using my invention I proceed as follows: I cast the silhouette-plate, coring the holes a little larger than the patterns, and not necessarily following their outline closely. The cores are so formed as to produce around the periphery of each hole an offset or shoulder, sometimes termed a rabbet, the upper side of the hole being largest. I also, by the same or other means, produce a groove, preferably irregular, i1n medialely above the offset. The patterns having been firmly mounted on the patternplate, and, if necessary, slightly smoked to avoid possible adhesion of the soft metal, I place the silhoutte, cast as described, over them, and having stopped with clay or other suitable material the space between the bottom of the before -described recess and the patterns, I pour into and fill up the recess with soft metal. The alloy known as Babbitt metal is'well adapted to the purpose, and is what I have chiefly used in my experiments. Type-metal will probably serve well. I then draw out the patterns and plane up the surfaces of the silhouette truly, and it is ready for use.

In the drawings, B is the silhouette; b, the offset or rabbet; b, the groove, and B the softmetal inner margin around each hole. Elbows t are the patterns mounted on a pattern plate, I, equipped with means (not shown) for moving it up and down.

In case the holes wear larger, I can easily peen out the soft metal with a hammer, or set it up with a punch until it fits again; or, in case of more extensive repair or alteration of patterns, I can readily cut out the soft metal from any part or the whole and cast it over again with little trouble or expense.

The offset 12 supports the soft metal against the possibility of. being forced downward through the iron plate by the great pressure liable to be applied above, by ramming or otherwise, in strongly compressing the sand. The groove 1) need be only sufficient to prevent any displacement of the soft metal in handling the silhouette.

MATTHEW R. MOORE.

WVitnesses:

W. O. DEY, CHARLES R; SEARLE.

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