US598252A - Molding-machine - Google Patents

Description

(No Model.)

J. E. MQOANNA. MOLDING MACHINE.

Patented Feb. 1, 1898.

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Nrrnn JOHN E. MCOANNA, OF BOUND BROOK, NEW JERSEY.

MOLDING=MACHINE SPECIFICATION forming part Of Letters Patent N0. 598,252, dated February 1, 1898.

Application filed July 30, 1897- Serial No. 646,454. (No model.) I

To all whom it may concern:

Be it known that I, JOHNE. MOOANNA, a citizen of the United States, residing at Bound Brook, in the county of Somerset and State of New Jersey, have invented certain new and useful Improvements in Molding-Machines; and I do herebydeclare 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 appert-ains to make and use the same, reference being had to the accompany ing drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in molding-machines, and more especially to the moldingmachine described in my Letters Patent No. 448,987, granted to me on the 24th day of March, 1891.

The object of my invention is to furnish a mechanical rapping attachment and toelevate the molding-flask in both instances by the manipulation of a hand-lever, and I have furthermore separated thepattern-plate into two parts, which latter improvement as the description proceeds will be found to be both useful and labor-saving.

In describing my invention I shall call attention to the accompanying drawings, where like letters of reference indicate corresponding parts in the different views, and I shall only illustrate sufficient of my molding-machine to embody my improvements, as the entire molding-machine and its modus opercmdi have been described in my Letters Patent referred to above and in other molding-machines heretofore.

Figure Us a front end View of my machine. Fig. 2 is a side View of Fig. 1. Fig. 3 is a top view of the pattern-plate A and the there unto-attached spider B, the pattern-plate A having the pattern-rapping cross 0 pivoted thereto; Fig. 4, a top view of the plate of the molding-machine, and Fig. 5 a top View of the top part of Fig. 1.

Referring to Fig. 1, D is the flask, having lugs 1), into which fit pins A, attached to the pattern-plate A.

A is the pattern-plate proper, to which the patterns are attached, and this has by me been constructed with a detachable middle part A which can be detached andreplaced to A with a new set of patterns for the following reasons:

It frequently happens in some branches of the hardware trade that a certain number of fixtures have a constant unvaryin g shape and size. These can be retained on the patternplate on the surfaces marked A and A in Fig-8; but corresponding to these so-called constants are certain variables that change from time to time, but mustbe cast in lots corresponding to the constants in about the proportion shown by the surfaces A and A Formerly the whole pattern-plate as a consequence had to be changed, Whereas with my reconstructed pattern-plate the variables can be put on the detachable plate A which then by suitable means is attached to the pattern-plate A.

The pattern-plate A is by four pins E attached to the spider B, but both pieces can be cast as one. The bottom part of the spider B has in a suitable mechanical manner secured to it two Vertical rods G, moving up and down in two guides H, bolted to the legs L and L of the frame L of the machine, and pivoted to the bottom part of each vertical rod is a link I, each of whichvis in turn pivoted to a crank-lever K, said crank K being firmly secured to a shaft M, supported in the legs L andL of the framework. At oneend of said shaft is a hand'lever N, attached to the shaft, by the manipulation of which an up-and-down motion is given to the spider andthe pattern-plate through the instrumentality of the above-described means.

The upper part of the molding-machine is constructed in the following manner: In order to admit of the four pins E, connecting the pattern-plate A and the spider B, passing through the plate P, said plate P is cut out, as shown in Fig. 4, around each pin E. In order to accomplish one of the objects stated by me, the said plate is furnished with four pins 0, adjustably secured in the plate by means of corresponding set-screws Q, which when required will separate the flask D from the pattern-plate. Previous to this operatops of these set-screws R rest, respectively, the ends of the four arms G 0 and O of the pattern-rapping cross 0, which cross is pivoted to the pattern-plate. It is now apparent that when the hand-lever N is manipulated so as to elevate the pattern-plate A high enough to permit the arms 0, C C and O of the cross 0 to be swung in over the tops of the screws R the pattern-rapping can take place. This simply consists of raising and lowering the hand-lever several times in succession and each time letting the patternplate strike on the set-screws R, or, rather,

on the cross interposed between said screws and pattern-plate, the operation being equivalent to the one generally performed by the molderwhenhe strikes the flask with a hammer several times, so as to loosen the sand from the surfaces of the patterns. When this rapping has been accomplished, the cross 0 is swung out of the way-that is to say, the arms are swung away from the top of setscrews Rand if the pattern-plate Ais then lowered it will easily be perceived that the flask D, hitherto a component part of the ele ments that partook of the rapping, will, when met by the four pins 0, firmly secured in the stationary machine-plate P, be stopped in its downward movement, and consequently be separated from the pattern-plate A, which was the desired object I had in view.

The stationary part of my machine is consequently the frame L, having the plate P attached at its top on legs L and L and the movable part the pattern-plate A, forming one operative piece with the spider 13, having attached to it the rods G, connected suitably by intermediate means with the shaft M, operated by the hand-lever N.

hat I therefore claim as my invention, and desire to secure by Letters Patent, is-

In a molding-machine, the combination of a flask, a pattern-plate having sectional plates,

a pattern-rapping cross pivoted to the under side of said pattern-plate, an upper plate of the molding-machine having four pins adjustably secured to it which pass through the patternplate, four set-screws secured in said upper plate to support said cross when in operative position, a spider having the pattern-plate attached to it and having suitable mechanical means secured to it operated by a hand-lever, for the purposes specified, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 28th day of July, 1897.

JOHN E. MCCANNA.

\Vitnesses:

O. L. PEEPLES,- AUGUST M. TRESCHOW.

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