US697948A - Molding apparatus. - Google Patents

Description

Patented Apr. l5. 902.

.8 VI M nn A P P A M G Em D WU M Application filed Oct. 9, 1901.] (No Model.)

UNITE- STATES PATENT OFFICE.

WILLIAM E. MCOLEARY, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF PORTLAND, MAINE, AND IIOPEDALE, MASSA- CHUSETTS.

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 697,948, dated April 15, 1902. j

Application filed October 9, 1901. Serial No. 78,048. (No model.)

T0 all whom it nuty concern:

Be it known that I, WILLIAM E. IVICOLEARY, a citizen of the United States, residing at Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Molding Apparatus, of which the following description, in connection with the accompanyin g drawings, is a specification, like letters on the drawings representing like parts.

In certain types of molding apparatus the pattern is sustained by and within a frame, the perimeter of which substantially corresponds with the match-frame and with the drag and cope flasks, such pattern-frame being sustained by the drag-flask and support ing the copeflask while the cope is being constructed, so that when the said frame is removed after the pattern is drawn the parting faces of the cope and drag project beyond the corresponding faces of their inclosing flasks. When these two parts of the mold are brought together, the parting face of the cope must of course register accurately with the opposed drag-face, and great care must be exercised to prevent uneven pressure upon the parting faces, and frequently the molder will press the cope down so hard that the parting faces will be more or less crushed, resulting in an imperfect casting.

My invention relates to molding apparatus of the type referred to; and it has for its object the production of means to positively control and regulate the pressure between the parting faces when the cope is placed upon the drag, the pressure being also maintained uniform throughout. Improper contact of the parting faces, and consequent injury thereto by crushing or unequal pressure,is absolutely prevented by my invention, and the assembling of the drag and cope is also materially facilitated.

In the present embodiment of my invention I provide the drag and cope flasks with suitable stops, which cooperate when the two parts of the mold are brought together after removal of the pattern-frame, providing for the relative positioning of the flasks exactly as they were during the construction of the cope.

Figure 1 is a longitudinal section showing the match and its frame with a pattern-frame in place, the drag-flask being applied ready for the construction of the drag. Fig. 2 is a top or plan view of the match and its frame with the pattern-frame in position, the perimeter of the pattern-frame being broken out in places to show the match-frame beneath it. Fig. 3 is a side elevation showing the parts of the mold assembled after the completion of the cope and removal of the pattern-frame, illustrating one embodiment of my invention; and Fig. ais a transverse section on the line was, Fig. 3.

The match-frame A, containing the match A, in which is formed the counterpart of the pattern of whatever form, the pattern-frame B, supporting the pattern b, Fig. 2, and having its perimeter shaped to correspond with the match-frame, and the drag and cope flasks D and 0, respectively, are and may be of usual construction and arrangement, said parts being substantially as shown in molding apparatus of the type referred to and now extensively used. In such apparatus after the drag and cope have been completed and the pattern-frame removed the parting faces of the mold project above the flasks, so that when the said faces are brought together there should be a clearance between the opposed edges of the two flasks equal to the thickness of the pattern-frame. Owing, however, to careless or too rapid work by the molder, this clearance is not maintained, and thecope will be pressed down too hard or with unequal pressure upon the drag, and the parting face of either or both faces will be crushed and damaged. In the present embodiment of my invention I have provided stops which coact at such time to preserve such clearance intact,'and to consequently maintain the separation of the drag and cope flasks at exactly the same distance they were previously separated by the interposed pattern frame, so that when the stops coact the parting faces of the mold are just in contact and with precisely the requisite pressure. Herein the stops are shown as lugs or projections 0 d, rigidly attached, as by screws, to the cope and drag flasks, respectively, and extending beyond their opposed edges.

The pattern-frame I3 is shown in Figs. 1 2 as resting upon the match-frame A,

4, and the match is removed, the patternframe then resting on the top of the dragflask. The overturning of the drag places the stops at in their operative position and thereafter the cope-flask will be applied, and while the pattern-plate is interposed between the flasks the cope-flask will be filled with sand to cover the pattern and rammed. The ramming having been completed, the patternframe is rapped or vibrated slightlyin usual manner to enable the cope to be lifted off,

and the pattern-frame will thereafter be removed, all as now commonly practiced. When the cope is placed over the patternframe, however, the ends of the stops 0 and 01 will just touch each other, the stops on each flask projecting beyond the edge thereof a distance equal to substantially one-half the thickness of the pattern-frame. The use of a pattern-frame as described leaves the parting faces of the drag and cope projecting beyond the edges of the drag and cope flasks, as at d 0 Figs. 3 and 4. After removing the pattern-frame the cope is turned over and placed upon the drag, and at this time the stops 0 and d contact one with the other (see Figs. 3 and 4) just as the parting face of the cope meets the corresponding parting face of the drag,the contact of the stops insuring the gentle contact of the parting faces of the mold, positively controlling the pressure between them and obviating all liability of disturbance thereof by crushing or unequal pressure. In other words, the clearance between the opposed edges of the drag and cope flasks is maintained by the stops at precisely the distance by which such edges were separated by the pattern-plate during the construction of the cope. When assembling cope and drag, all the molder has to do is to see that the usual flask-guides cooperate, and he then quickly lowers the cope until the stops 0 engage the stops d on the drag-flask, so that the rapidity of the work is increased and the effect of carelessness or lack of skill in properly bringing the parting faces of the mold together is reduced to a minimum.

I have herein shown well-known forms of snap-flasks held together by suitable catches when in use in usual manner, and after the drag and cope have been assembled, as described, said flasks may be unlocked and removed from the mold to be again used in the production of other molds.

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

In molding apparatus, drag and cope flasks, a pattern-frame to rest upon the drag-flask and sustain the cope-flask during the construction of the cope, and stops projecting beyond the opposed portions of the flasks and contacting with each other when the patternframe is interposed, said stops also cooperating with each other after removal of the said frame, to equalize and positively control the pressure between the parting faces of the mold.

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

A WILLIAM E. MOCLEARY.

, Witnesses:

GEORGE OTIs DRAPER, ERNEST W. WOOD.

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