US1838418A

US1838418A - Art of casting

Info

Publication number: US1838418A
Application number: US482021A
Authority: US
Inventors: May John Le
Original assignee: AURORA METAL Co
Current assignee: AURORA METAL Co
Priority date: 1930-09-15
Filing date: 1930-09-15
Publication date: 1931-12-29
Anticipated expiration: 1948-12-29

Description

ya W J. LE MAY ART OF CASTING Filed Sept. l5, 1950 Dec. 29, 1931.

Patented Dec. 29, 1931 UNITED STATES 1,#.@.Tlaz-rrl OFFICE', f

JOHN LE MAY, or AURORA, ILLINOIS, AssIGNORfTO AURORA METAL COMPANY, OF AURORA, ILLINOIS, A cORroRA'rION OE ILLINOIS ART F CASTING- Application led September 15, 1930. Serial- INO.'L182,0021`.

This invention relates to improvements in the art of casting and more especially the casting of metal. My invention is especially applicable for use in connection with die casting under pressure or vacuum in separable molds.

Among the features of my invention is the provision of a method and means for preventing east elongated members from shrinking in length. In the casting of grids, and

which Fig. 1 is a view in perspective of a separable mold, Fig. 2 is a vertical sectional view of the same, Fig. 8 is a view ltaken as indicated by the line 8 of Fig. 2, Figt is a view similar to Fig. 2 showing a modified form, Fig. 5 is a view taken as indicated by the line 5 of Fig. 4, Fig. 6 is a view taken as indicated by the line 6 of Fig. l, Fig. 7 is a view similar to Fig. 2 showing a modied form, and Fig. 8 is a View taken as indicated by the line 8 of Fig. 7.

As shown in the drawings, the mold of Figs. 1, 2 and 8 is adapted for casting a grid with the two

elongated side members

10, 10,

connected by the branches or bars 11, 11.`

The mold is separable, and includes the two

side pieces

12, 12 and the two

end pieces

18, 13. Any ordinary clamping or other mechanism (not shown) may be employed for holding the parts of the mold together dur-V ing the casting operation which may be facilitated by pressure or vacuum.

In the casting of a piece such as the grid shown, the

elongated members

10, 10, unless prevented, may shorten upon cooling thus shearing o or damaging the relatively smaller or lighter branches or connecting

bars

11, 11. By the use of my invention, such undesirable shortening of the members 10, is lessened or prevented. This is accomplishedfby providing the enlarged

heads

10, 10a on the ends of the

members

10, 10. These enlarged heads are here shown as formed in suitable cavities in the

end pieces

18, 13 of the mold and they engage the ends of the center pi-

eces

12, 12 thus holding the

members

10, 10 against shortening, anynecessary shrinkage being permitted by a slight reduction in diameter. The ends of the

center pieces

12, 12 form shoulders that the heads bear against. I

The mold may be filled in any suitable manner. For example, in the forms shown theA metal may enter through one of the openings in the end piece 13.

In Figs. 4, 5 and 6, I have shown a mold for casting another form of device. The principle, however, is the same. As here shown,-

the mold is made to cast a central elongated member 15 with fins 16. In Order to prevent the elongated member 15 from shrinking in length and shearing oit or damaging the fins 16, I provide the

heads

15a, 15a which engage the ends of the center pieces 17 of the mold. The

end pieces

18, 18 of the mold are provided with suitable cavities to form the enlarged heads 15a.

The same invention is illustrated in Figs. 7 and 8 in which there is shown a mold for casting an elongated member 20 with the

smaller pieces

21, 21 attached thereto by the stems or branches 21a. To prevent the elongated member 20 from shortening in length it is vprovided with the enlarged heads 2Oa in the end pieces 22 of the mold. The center pieces of the mold are indicated by 23, 28.

It is obvious that in cases where the elongated member can be removed without separation of thecentral part of the mold, said central part may consist of only one piece.

VV'hile I have shown and described certain embodiments of my invention, it is to be understood that it is capable of'many modifica-A tions. Changes, therefore, in the construc-V tion and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claim, in which it ismy intention to claim all novelty inherent in my invention as broadly as possible in view of the prior art.

I claim:

In the art of casting an elongated member with laterally projecting parts, the method consisting of providing a mold having an elongated cavity with enlarged excess metal cavities at the ends thereof, and introducing molten metal into said cavities, whereby the elongated cast member formed upon cooling` is prevented from materially shortening and damaging its laterally projecting parts by the formation of heads thereon in the said enlarged excess metal cavities.

In Witness whereof, I have hereunto set my hand and seal, this 10th day of September,

JOHN LE MAY.