US474210A

US474210A - Vania

Info

Publication number: US474210A
Authority: US
Publication date: 1892-05-03
Anticipated expiration: 1909-05-03

Description

(No Model.) 2 Sheets-Sheet 2.

$. S. CASJKEY 81: J. M. DODGE,

' MOLDING FLASK. No. 474,210. Patented May 3, 1892.

.cope and drag is a cheek-piece D, which is UNITED STATES PATENT OFFICE.

SAMUEL S. CASKEY AND JAMES M. DODGE, OF PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO THE LINK-BELT ENGINEERING COMPANY, OF SAME PLACE.

MOLDlNG-FLASK.

SPECIFICATION forming part of Letters Patent No. 474,210, dated May 3, 1892.

Application filed September 17, 1891.

To all whom it may concern:

Be it known that we, SAMUEL S. CAsKEY and JAMES M. DODGE, both citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Molding-Flasks, of which the following is a specification.

The object of ourinvention isto so construct the cheek-piece of a three-part mold used for molding grooved pulleys and like articles that the mold can be packed more readily and evenly and can be suitably ventilated, as fully described hereinafter, reference being had to the accompanying drawings,in which- Figure 1 is a transverse sectional View of the flask with the molding-sand packed around the pattern. Fig. 2 is a section on the line 1 2, Fig. 1, illustrating one-half of the flask. Fig. 3 is a perspective View of a portion of the cheek-piece of the flask; and Figs. 4, 5, 6, 7, 8, and 9 are diagrams illustrating the method of using our improved flask.

Heretoforein the manufacture of such castmetal articles as grooved pulleys, where a three-part mold using a cheek-piece is employed, great difficulty has been experienced in making up the portion of the mold between the cope and drag, for in the first place it could not be readily packed so as to make it even and solid throughout, and in the second place it could not be properly ventilated. We overcome these objections in the following manner.

Referring to Fig. 1, A is the cope, and B the drag, of the mold, and situated between the shown in detail in Fig. 3, this cheek-piece being formed of two rings d d, united together at intervals by webs e, forming openings f, through which the mold can be packed and rammed and through which access may be had to the mold to form the ventilating-openings necessary for proper casting. The ring d has an annular flange 01 which extends into the mold to a point near the line of the rim of the wheel to be molded, as clearly shown in Fig. 1, this flange cl being strengthened by a series of braces g, which extend from the webs e, as shown clearly in Fig. 3 as well as in Fig. 2.

Serial No. 405,941. (No model.)

We will now describe the manner of packing a mold in which ourimproved cheek-piece is used.

o first lay the follow-board level and place the pattern m thereon, as shown in Fig. 4., the pattern being divided at the rim, so as to form a ring 02, which is secured to the main pattern by screws 7a or other fastenings. The cheek-piece is then placed in position with the flange (Z upward and resting on the follow-board, and the drag B is set upon the cheek-piece and keyed thereto, and sand is then rammed into the drag, as indicated in Fig. 4. The cheek-piece, follow-board, and drag are then reversed, as shown in Fig. 5, after which the follow-board is removed. and the cheek-piece is rammed as shown in said figure, a parting-linebeingmade at the upper edge of the cheek-piece and the flange d supporting the rammed sand. It will be noted that the sand can be rammed not only from the top of the cheek-piece, but through the opening f therein, thus insuring the proper ramming of this portion of the mold, which is important in the case of grooved pulleys, as it is essential that the sand should be properly rammed into the groove of the pat-- tern, so as to avoid the necessity of turning thepulley in the lathe after it has been cast. The cope A, being placed upon the cheekpiece and clamped thereto in the usual manner, said cope is then rammed with sand, as shown in Fig. 6, and after it has been properly rammed it is lifted off, as shown in Fig. 7, and the ring portion at of the pattern is detached from the main body m, as shown, in Fig. 7, after which the cheek-piece D is removed, as shown in Fig. 8, the flange d supporting the rammed sand in said cheek-piece. The body portion of the pattern can be readily removed, after which the cheek-piece is again mounted upon the drag and the cope upon the cheek-piece and the whole locked together ready for pouring. Previous to the locking,

however, either during the process of buildup the mold or after the mold has been built up, suitable vent-openings are made for the ready escape of gases that accumulate in the mold, the openings f in the cheek-piece per mitting the proper venting of the sand supported by said cheek-piece, as the ventingtools can be readily inserted through the openings.

It will thus be seen that by the use of the improved cheek-piece we are enabled to make an accurate mold,which will be properly vented and which will support the rammed sand in a firm and substantial manner.

YVe claim as our invention 1. The combination, in a molding-flask, of the cope and drag with a cheek-piece situated between the cope and drag, said cheek-piece having a series of openings through which the sand can be rammed, substantially as described.

2. The combination of the cope and drag with a cheek-piece situated between the cope and drag, said cheek-piece having an internal supporting-flange for the sand and openings through which the sand between the faces of the cope and drag can be rammed and through which vent-openings can be made in the sand, substantially as described.

.3. The combination, in a cheek-piece for molding-flasks, of the two rings, webs uniting the two rings together and provided with openings between the rings, and an internal flange forming an extension of one of the rings, substantially as described.

at. The combination, in a cheek-piece for molding-flasks, of the two rings, webs uniting the two rings together and provided with openings between the rings, an internal flange pro- 3' ectin g from one of the rings, and braces for said flange, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

SAMUEL S. OASKEY.

JAMES M. DODGE. Witnesses:

EUGENE ELTERIOH, HENRY H0wsoN.