US1703082A - Mold - Google Patents

Description

Feb. 19,1929.

I A; B. NORTON HOLD Filed June 22, 1927 2 Sheets-Sheet 1 INVENTOR ORNEY Feb. 19, 192%.

1,703,082 A. B. NORTON MOLD ' Filed June 22, 1927 2 Sheets-Sheet 2 rm F 53 I z/ 2 "n T /4 n" I 2 r J l l 4.1

Patenteil Feb. 19, 1929.

UNITED STATES PATENT oFF cE.

ALLEN B. NORTON, OLE CLEVELAND, OHIO, ASSIGNOR TO ALUMINUM CGMPANY OF AMERIQA, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

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Application am June 22, 1927. Serial No. 200,526.

This invention relates to permanent molds such-as are used in casting metal. The mold to which it relates is particularly adapted to the production of large but relatively narrow castings, although it may be used for pieces of many other shapes.

- Heretofore moldshav e been used for casting large fiat and other narrow objects but ditliculty has been experienced in that solid particles get between the mold sections and the sections otherwise become displaced and so produce castings of var ing thickness, this being particularly noticea Is and undesirable invery'thin castings, and incastings which it fsdesired shall he used without machining. I have provided a mold in which the parts are firmly retained in place and by which uniform castingsare produced, and which at the same time is simple and durable in construction and quickly and easil operated.

The invention will be tter understood from the description of one practical embodiment thereof, illustrated in the accompanying drawing, in which Fig. 1 is a central longitudinal vertical section of a mold'embodying the invention,

' Fig. 2 is a central transverse vertical sectioai thereof taken "on the line I I--II of Fig. 1, an

Fig. 3 is a plan View thereof, showing parts broken away. i

The apparatus consists of a table having a flat horizontal top or mold base 1 supported T by legs 2. Upon the top, and substantially centrally thereof, the mold sections are supported. The mold itself consists of two sec-'- 'tionsa stationary lower section or drag 3, which-isrigidly secured to-the table top as by bolts-'4, and a7 removable upper section or cope 5. The cope has an .annular marginal flange 6 fittinga corresponding groove in the drag, the flange being interrupted to receive key 7, so that the sections ma be positively located with respect to each 0t er. The cope or upper section isdiametrically s lit into two similar halves so that it may removed'from the casting before the gate is removed therefrom. The adjacentsides of the cope and drag are recessed to form the mold cavity, which in the apparatus illustrated, is shaped to form wheels, each having a hub 8, rim 9, and six spokes 10.

The mold sections are held in place during the casting operation by two clamping sections Hand 12. Theseare hinged at one end easily upon a post 13 and may be clamped together at the other by'a bar 14 and clamp 15. The 'inner sides of the clamping sections are recessed to fit about the mold sections. At last one mold section is provided with a frustroconica'lor other tapered face 16 which is engaged by corresponding faces on the clamping sections so that the mold sections are wedged'tightly together when the clamping sections are closed and anything holding the mold. sections apart prevents the clamping sections from closing, and thus prevents use of the mold to form non-"uniform castings.

The clamping sections also hold the halves of l the cope tightly together. I

The inner sides of the clamping sections are recessed above the mold sections to provide suitable gate and riser cavities 17, communicating with the mold cavity. A vertical plunger 18 extends through the table top and into the bottom of the cavit in the drag and may be moved u wardly to raise and eject a casting there om. Thelower end of the plunger carries a block 19 having a rack formed along one side, the rack being engaged bya pinion 20 carried by shaft 21 and operated by handle 22 for'actuating the ejector.

From the description of parts the operation 0f themold will be fairly obvious. First the operator places the parts of the cope 5 upon the drag 3, causing flange?) to engage with its Hrelatively displaced After swinging the clamping sections together the operator positions bar 14 in clamping position and rotates the-clamp handle 15 to further wedge these sections tightly together. .Themoltenv metal is then poured into-the gate and riser cavities 17, filling the mold and substantially filling the gate cavity. After the metal has hardened, the clamp is released and the clamping sections swung apart. This leaves the casting enclosed between the co and the drag with the metal which was mined in the gate and riser cavities exposed. Due to the cope being formed in halves, these halves may be removed laterally and the casting lifttions to hold them tightly together;

2. A mold comprising a plurality of sections, inclined surfaces on some of the said sections, and clamping means engaging said inclined surfaces to wedge and hold the mold sections tightly together.

3. A mold comprising upper and lower mold sections, laterally moving clamping sections, there being inclined surfaces on said mold sections cooperating with inclined surfaces on said clamping sections whereby movement of the clamping sections toward each other wedges the mold sections tightly together.,

4. A molding apparatus comprising a base, a drag fixed to said base, a cope fitting thereon, inclined surfaces on one of said mold parts, and laterally movable clamping sections supported on said base and engaging said inclined surfaces when moved together to wedge the drag and cope tightly together.

5. A mold comprising a drag and a divided cope, clamping sections movable to clamp said drag and cope tightly together, and recesses in said clamping sections constituting gate and riser cavities for the mold.

6. A mold comprising a drag and cope, inclined surfaces on one of said'sec-tions, the cope being divided diametrically, clamping sections engaging said inclined surfaces to wedge said drag and cope together, the inner surfaces of said clamping sections, when in closed position, constituting gate and riser cavities for the mold.

7. A mold comprising a drag and cope, clamping sections engageable with said mold sections, wedging means carried thereby for tightly holding the mold sections together, and an ejector for removing castings from the mold. a

In testimony whereof I hereunto afiix my signature this 7th day of June, 1927-.

ALLEN B. NORTUN.

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