US1124237A - Mold. - Google Patents

Description

F. B. TORREY.

MOLD.

APPLIGATION FILED SEPT.11. 1913.

Patented Jan. 5, 1915.

FRANCIS .B. TORREY, OF RICHMOND, MAINE.

MOLD.

Application filed September 11, 1913.

T0 alien/tom it may concern Be it known that I, FRANCIS B. TORREY, citizen of the United States, residing at lticlnnond, in the county of Saga-dahoc and State of Maine, have invented certain new and useful Improvements in Molds, of which the following is a specification.

This invention relates to molds and more particularly to a mold designed for use in molding bushings such as shown and described in my co-pending application, filed July 10, 1913, Serial Number 7 78,410.

It is an aim of the present invention to provide a moldso constructed. that the bushing section molded therein may be readily removed from the mold, the mold being formed in sections adapted to be assembled in such a manner that one of the sections may be readily removed after the metal has become hardened, leaving one end of the bushing section exposed in such a manner that it may be conveniently grasped and withdrawn.

r'inother object of the invention is to provide a mold adapted to mold a bushing section having pockets of such contour as to retain lubricant. packed within the pockets.

The invention also has as its object to so construct the mold that its several sections may be readily disassembled so as to expose all portions of the interior of the mold.

In the accompanying drawings: Figure l is a group perspective view illustrating the sections of the mold in position to be assembled. Fig. 9. is a vertical longitudinal sectional view through the mold with the parts assembled and before the introduction of the molten metal. Fig. 3 is a vertical transverse sectional view on the line 3-3 of Fig. 2, and illustrating the mold filled. Fig. 4 is a perspective view of one of the bushing sections produced by the use of the mold.

In the drawings there is illustrated but a single one of the molds embodying the pres ent invention but this showing is merely illustrative and in practice the molds will be arranged in gangs so that a number of bushing sections may be produced in one operation.

The mold consists in part of a section 1 which constitutes the body section and which is provided with an opening 2 in which is fitted a fixed core section 3. The core section 3 is provided with a tapered bore 4 and in this bore is removably fitted a core 5 which is tapered from end to end and of a length considerably greater than the length Specification of Letters Patent.

Fate-rated Jan. 5, 1915.

Serial No. 789,360.

of the core section 3. The core section 3 preferably projects at both ends beyond the opposite faces of the section 1 of the mold and the minor end of the bore 4 is located at that end of the core which projects beyond the forward face of the section 1. That portion of the core section 3 which fits within the opening 2 is exteriorly cylindrical and that end of the section which projects beyond the forward face of the section 1 is also cylindrical for a short distance in advance of the said face as indicated at 6. Beyond its portion 6 the said projecting end of the core section is gradually tapered as, at 7 and then sharply tapered as at 8, to its extremity. The tapered portions 7 and 8 of the said projecting end of the core section 3 are formed at intervals with recesses 9, the walls of which converge in the direction of the cylindrical portion 6 of the said end of the section and the formation of these recesses results in a number of fingers 10, aswill be apparent from an inspection of Figs. 1 and 3 of the drawings. The sides of the fingers 10, or, in other words, the walls of the recesses 9, extend substantially radially to the axis of the core section except that as stated, they diverge toward the extremity of the said section. As before stated, the core 5 is removably fitted within the bore of the core section 3 and its minor end projects beyond the above-described end of the said core section 3. It will be apparent, therefore, that the inner or concave sides of the fingers 1O snugly fit the surface of the core 5 so that pockets 11 are formed between the fingers, which pockets decrease in width in the direction of their inner ends and are also widened in an upward direction due to the fact that the walls of the recesses 9 are substantially radial to the axis of the core section 3. It will also be apparent that in view of the fact that the projecting end of the core section 3 is tapered toward its extremity the pockets 11 are decreased in depth toward the extremity of the said projecting portion. The mold also includes an intermediate section 12 and a cap section 13 and in order that these sections may be properly assembled with and centered with respect to the section 1, the forward face of the section 1 is provided with forwardly projecting pins 14 located at opposite sides of the core 5 and the sections 12 and 13 are formed respectively with openings 15 and 16 through which the pins 14 project when the sections are assembled. The section 12 is formed between the openings with an opening 17, the wall of which is cylindrical and of a diameter equal to the diameter of the cylindrical portion 6 of the projecting end of the core section 3 and when the section 12 is fitted upon the pins 1 1 the wall of the opening 17 at that end of the opening which is presented at the face of the section abutting against the forward face of the section 1, snugly fits the said cylindrical portion 6 in the manner clearly shown in Fig. 2. That face of the section 18 of the mold which contacts with the forward face of the section 12 is formed with an opening 18 designed to snugly fit the projecting forward end of the core 5 in the manner shown in the said figure and with an annular recess 19 which surrounds the inner end of the opening and is of the same diameter as and matches the other end of the opening 17.

The contacting faces of the sections 12 and 13 are formed with recesses 20 which open at the upper sides of the said sections and which register when the sections are assembled so as to form a hopper-like inlet opening through which the molten metal may be introduced into the mold.

From the foregoing description of the .invention it will be apparent that metal poured into the mold will be formed into a bushing section such as illustrated in Fig. t of the drawings.

The bushing section, briefly stated, consists of a body portion a exteriorly cylindrical and having projecting spaced portions 1), the opposite sides of each converging toward the ends of the portions, and webs 0 which extend between the inner ends of the said portions. It will be apparent, particularly by reference to Fig. 3, that pockets are formed between the portions 5, which pockets are contracted at the inner surface of the bushing section.

In completing the bushing, of which a pair of the sections constitute the body, one of the sections is fitted in one end of the hub of the wheel in which the bushing is to be arranged and the wheel with the section arranged within its hub is then disposed upon a suitable support having an upstanding core which projects up through the hub and snugly fits the opening in the bushing section. A suitable lubricating paste is then introduced into the hub until the hub and the pockets in the section are filled, after which the other section of the bushing is forced into the other end of the hub thereby compressing and compacting the mass of lubricant. The core and wheel are then removed from the table and baked until the lubricant becomes extremely hard, after which and finally the core is removed.

It is preferable in the use of the mold be fitted Within a suitable length of tubing which in turn may be inserted into the hub. It will also be apparent that if desired the bushing section may be molded with a greater number of spaced portions with corresponding increase in the number of pockets.

Having described my invention, claim is:

1. In a mold, a body section, a core section projecting from one face thereof and eXteriorly tapered and provided with spaced recesses, an intermediate section assembled with the body section and having an opening of greater diameter than the tapered end of the core section and receiving the same, a cap section assembled with the said intermediate section, and a core fitted through the said core section and through the said sections.

2. In a mold, a body section, a core section projecting from one face thereof, the said core section adjacent the face of said body section being substantially cylindrical and beyond its cylindrical portion being tapered to its end, an intermediate section assembled with the body section and having an opening receiving said-core section, the wall of the opening at one end thereof fitting the substantially cylindrical portion of the core section and the opening being of greater diameter than the tapered end of the core section, and a cap section assembled with the said intermediate section.

8. In a mold, a body section, a core section projecting from one face thereof and exteriorly tapered and formed with spaced recesses in its tapered portion, an intermediate section assembled with the body section and having an opening receiving the said core section, a cap section assembled with the intermediate section and having an opening and provided in oneface with a recess surrounding the opening and registering with the opening in the contacting face of the intermediate section, and a core fitted through said core section and projecting through the opening in the intermediate section and fitting the opening in the cap section.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS B. TORREY. [1 s] Witnesses:

Gno. W. HUNT, JOHN R. KNOWLTON.

what I Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

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