US962002A - Apparatus for molding. - Google Patents

Description

T. H. BROWN.

APPARATUS FOR MOLDING.

APPLICATION FILED SEPT. 23, 1909.

Patented June 21, 1910.

2 SHEETS-SHEET L FIG.

lllllll, V

v INVEIVI'UR,

WIT/VL'SSES:

ANDREW B. GRAHAM 00., VHOIO-LITNOGRAFMERS. WASNKNGION n c.

Patented June 21, 1910.

2 SHEETS-SHEET 2.

l/WENTOI? WITNESSES:

ANDREW a. GRAHAM 00., Pnoro-umocnuusna WASHINGTON. Lu;

THOMAS HAROLD BROWN, OF LEBANON, PENNSYLVANIA, ASSIGNOR TO THE BUCH- ANAN FOUNDRY COMPANY, OF LEBANON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

APPARATUS FOR MOLDING.

Patented June 21, 1910.

Serial No. 519,250.

To all whom "it may concern:

Be it known that I, THOMAS HAROLD BROWN, a citizen of the United States, residing at Lebanon, in the county of Lebanon and State of Pennsylvania, have invented Apparatus for Molding, of which the following is a specification.

My apparatus is designed particularly for molding sash weights.

- My leading objects are to provide by improved mechanism an improved mold having several vertical tiers of molding forms; to fill the forms of the several vertical tiers in series and avoid the production of imperfect or incomplete castings which commonly result from shortage of metal in pouring in the usual practice; and to obviate the collection of steam in the top of the mold, which forms holes or blows and is otherwise injurious in the usual operations of parallel casting.

The characteristic features comprised in the practice of my invention are embodied in the use, with a molding box, of a centrally disposed cross bar of convex bottom contour intersected by transverse channels which forms a head gate having sections that will receive metal in succession; a set of fingers supported by and movable vertically through the cross bar at points respectively between adjacent channels to form finger gates that will fill in succession; and two sets of patterns arranged in vertical tiers to produce molding forms, the patterns having inner ends connected with and supported by the fingers and their outer ends supported by frames through which they are longitudinally movable.

WVhen the sand bed is formed by means of these parts and the several patterns, fingers and cross bar are separately removed, upon pouring the metal in the center of the head gate it will run down the central finger gate or gates until the central tier or tiers of forms or molds are filled, then the metal flows down the successive finger gates and the forms or molds connected therewith are filled in series.

In the accompanying drawings, Figure 1 is a plan view of apparatus designed for the practice of my invention; Fig. 2 is a sectional view taken on the line 22 of Fig. 1; Fig. 3 is a sectional view taken on the line 33 of Fig. 1; Fig. 4 is a sectional view taken on the line 44 of Fig. 1; Fig. 5 is an enlarged sectional view showing parts in the relation illustrated in Fig. 4; and Fig. 6 is an enlarged sectional view of a mold formed by means of parts shown in Fig. 5.

The apparatus, as represented in the drawings, comprises a molding box or flask having the bottom 1, the sides 2 and the ends 8. A central cross bar 4 is supported upon the sides 2 and has the convex bottom 5 intersected by the transverse channels 6. Fingers 7 (containing transverse passages 8) pass vertically through and are supported by the cross bar 4. Adjustable frames 9, containing passages 10 arranged in vertical tiers or columns, intersect the box. And patterns 11 and 12 pass through the apertures 10 in the frames and are connected with the fingers 7 the patterns 11 having pins 11 on the inner ends thereof which pass through the apertures 8 of the fingers and the patterns 12 have sockets 12 on the inner ends thereof which engage the ends of the pinsprojecting through the fingers.

With the parts arranged as described, the flask is filled with sand between the frames 9 and the bed containing the mold is formed. The patterns are then withdrawn from the fingers through the frames, the fingers are withdrawn through the cross bar, and the cross bar is removed. Cores 13 are then inserted through the apertures in the frames so that they extend into the mold sections 14 and sand is filled into the spaces between the frames and the ends of the flask. Metal is then poured into the central part of the head gate 15, formed by the cross bar 4, and flows down through the central finger gates 16 until the two central tiers 14 of the mold are filled. The metal then runs over the separating ribs 17 in the bottom of the head gate into the finger gates in succession in both directions from the center, filling in succession the tiers of the mold connected with the respective finger gates, until the cast is made.

here it is desired to mold a large number of parts at a single cast, as is important for economy of operation, and all of the articles in a horizontal row are simultaneously cast, if there should be a shortage of metal so that all of the corresponding compartments of the mold receiving metal cannot be filled,

a large number of defective castings result, which is avoided by my operation. When metal is poured simultaneously into several bottom forms and then into several superposed forms and so on the heat developed throughout the lower part of the bed causes steam to collect in the higher forms and blows or holes are thereby produced in the metal cast in such higher forms, which is avoided by my operation.

Having described my invention, I claim:

1. In the art of molding, a casting form comprising a head gate having an inclined bottom, several finger gates extending doW-nwardly from points of differentelevation along the bottom of said head gate, and a vertically arranged tier of forms connected with each finger gate.

2. In the art of molding, a casting form comprising a horizontally disposed head member having an inclined bottom surface divided by transverse parts, members, connected with and extending downwardly from said bottom at pointsrespectively be-v tween transverse parts, and one or more sets of superposed members connected With and extending transversely to each of said downwardly extendingmembers. 3. In the art of molding, a casting form [comprising a horizontally disposed head gate having a bottom surface inclined upwardly, toward 1ts ends from an Intermediate pomt, finger gates extending downwardly from the head gate at intervals along its. bottom, and one or more sets of superposed forms communicating with each of said finger gates.

4:. In the art of molding, the combination with a molding box, of a crossbar, a set of substantially vertical fingers supported in and adapted to be separately withdrawn from said cross bar, and a set of patterns adapted for engagement with and Withdrawal from each of said fingers.

In Witness whereof I have, hereunto set my name this th day ofSeptember, A. D...

1909, in the presence of the subscribing'witnesses.

THQMAS HAROLD- BROWN. Witnesses:

ROBERT JAMES EARLEY, Jos. G. DENNY, Jr.

Images