US830925A - Mold. - Google Patents

Description

PATENTED SEPT. 11

GQPELLINGBR.

MOLD.

APPLICATION FILED JULY 3, 190a.

animator.

G'eorae e! witnessed THE mmms PETERS co. WASHINGTON n. c.

UNITED STATES r PATENT GFFICE.

Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed July 3, 1906. Serial No. 324,686.

To all whom it may concern.-

Be it known that I, GEORGE PELLINGER, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Molds ,and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide an improved mold having special reference to those in which the soft metal, such as tin or lead in which the matrices are formed, is held in frames of cast-iron or other hard metal.

The invention is directed to the provision of means for holding the matrix metal in its frame and preventing its becoming loosened by reason of the unequal expansion of the two metals when heated.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of the obverse side of a frame constructed in accordance with my invention. Fig. 2 is a view of the reverse side. Fig. 3 is a transverse sectional view on line 3 3, Fig. 1. Fig. 4 shows one of the frameswith the matrix metal applied thereto and with the moldcavities or matrices indicated. Fig. 5 is a view of the die. Fig. 6 is a section on line 6 6, Fig. 4.

Referring to the drawings, 1 designates one of the frames, two of which, as will be understood, are employed in molding, each containing corresponding matrices and designed to be secured together in alinement to constitute the drag and cope members of a molding-flask. As shown in Fig. 1, the frame, preferably made of cast-iron, is formed on its obverse side 2 with marginal walls 3, inclosing a hollow or dish-like portion 4, through the bottom of which are holes or apertures 5, extending entirely through the thickness of the metal. On its reverse side, as shown in Fig. 2, the frame is formed with marginal walls 6, a central transverse wall 7, and diagonal walls 8, the portions of this surface of the frame intermediate the walls thus forming a plurality of compartments 9 in communication with the dish-like portion 4 of the obverse side of the frame through their respective holes or apertures 5. Through the center of the frame is a hole 10 of greater size than those designated by 5 and to the edges of which the walls 6, 7, and 8 extend, the hole being thus practically.surrounded by a wall of increased thickness. 12 designates a hole shown near one end of the frame through which the matrix metal troduced. In practice the frame is laid, with its reverse side up,upon a die, (indicated at 13,) the walls 3 of the obverse side contacting with the die and the latter having in relief the formation which it is desired'the matrices or intaglio of the mold shall assume. In the present instance the die is shown with longitudinal ribs 14, designed to form grooves or channels 16, constituting matrices, for molding rubber pipe-stems. The die is also shown with a lug or post 17 preferably near one end and a recess 18 near the other end. The molten matrix metal, such as tin, is then poured into the frame through hole 12, and after filling the space between the die and the surface of the dish-like portion 4 of the obverse side of the frame it passes through holes 5 to the upper or reverse side of the frame and into compartments 9, filling the latter about flush with walls 6 7 8. WVhen the metal is sufficiently cool and hard, the frame is removed from the die. The metal has then assumed the form shown in Fig. 4, comprising the n1old-face 19 on one side of the frame, the face 20 on the other or reverse side of the frame, (see Fig. 6,) and a series of integral lugs or posts within holes 5 and connecting the two faces of metal. It also includes an enlarged central lug or post within hole 10, a lug 21 at one end of its mold-face 19, formed by recess 18 of the die, and a recess 22 formed by post 17 of the die. The lug within hole 10 is an integral part of the matrix metal 19, but is independent of the metal in the compartments 9, and likewise the metal in each of these compartments, while an integral part of the matrix metal is independent of the metal in the other compartments and is confined within walls of )eculiar shape. Hence when the metal has ecome hard the possibility of its shifting in its frame by reason of the unequal expansion of the two metals when a hot plastic is contained in the matrices is reduced to a minimum if, in fact, it is not completely obviated. Even if the metal plate in one of the compartments 9 should become loosened and its lugs permit of some play or shift of the matrix-face'19 such face will still be held by the may be in- 19 of the drag member, and the cope member is laid with its matrix-face opposed thereto, so that the lugs 21 of one frame will enter re cess 22 of the other and the respective ma- 1 Any 5 suitable means may be employed to exert I trix-cavities will be held in register.

sufficient pressure upon the cope until the rubber has cooled and hardened.

I claim as my invention- 1. In a mold, a frame having a receptacle designed to contain molten matrix metal, a

compartment also designed to contain such 'matrix metal, and a wall in said frame having holes or apertures establishing communi cation between said receptacle and said compartment, whereby the metal contained in said receptacle is connected to that in said compartment by integral lugs or posts within said holes or apertures, for the purpose stated.

2. In a mold, a frame having a receptacle designed to contain molten matrix metal, a series of compartments also designed to con tain such matrix metal, anda wall in said frame having holes or apertures establishing communication between said receptacle and each of said compartments, whereby the metal contained in said receptacle is connected to that in said compartments by integral lugs or posts within said holes or apertures, for the purpose stated.

3. In a mold, a frame having a hollow or dish-like portion in its obverse face, and'a series of angularly-disposed ribs or walls on its reverse face forming separate compartments in communication with said hollow or dish-like portion, for the purpose stated.

4. In a mold, a rectangular frame having a hollow or dished portion in its obverse face, its reverse face being inclosed by marginal walls and having a central transverse wall and diagonally-disposed walls, whereby aseries of triangular-shaped compartments is formed, each of said compartments having holes or apertures establishing communication with said hollow or dished portion.

5. In a mold, a frame having a web constituting the faces of'the two sides of the frame, said frame having marginal walls inclosing said web and forming a receptacle on the obverse face, said web having on the reverse face a series of ribs or walls forming compartments, said web having holes or apertures establishing communication between said receptacle and said compartments, and

When used for mo ld matrix metal in said receptacle, said holes,

and said compartments.

6. In a mold, a rectangular frame having a web constituting the faces of the two sides of the frame, said frame having marginalwalls mclosing said web and forming a receptacle on the obverse face, said web having on the reverse face a central transverse wall and diagonal walls forming a series of triangularshaped compartments, said web having holes or apertures establishing communication between said receptacle and said compartments, and matrix metal in said receptacle, said holes, and said compartments.

7. In a mold, a rectangular frame having a web constituting the faces of the two sides of the frame, said frame having marginal walls inclosing said web and forming a receptacle on the obverse face, said web having on the reverse face a central transverse wall and diagonal walls forming a series of triangularshaped compartments, said, web having holes or apertures establishing communication between said receptacle and said compartments, and an enlarged hole at the point of intersection of said transverse and diagonal walls, and matrix metal in said receptacle, said holes, and said compartments.

8. In a mold, two parts, or members each having a receptacle in its obverse face, a series of compartments in its reverse face, holes establishingcommunication between said receptacle and said compartments, and matrix metal filling said receptacle. said holes and said compartments, a lug and a recess being formed in the metal in each 6f said receptacles designed to engage, respectively, the recess and lug in the metal of-the other part or member.

9. In a mold, two parts or members each having a receptacle in its obverse face, a series of compartments in its reverse face, holes establishing communication between said receptacle and said compartments, and matrix metal filling said receptacle, said holes and said compartments, grooves or channels constituting matrices being formed in the metal in said receptacles, and means for holding said parts or members in alinement.

10. In a flask for molding pipe-stems, two members, each comprising a framehaving holes, a metal matrix-face on the obverse side of said frame having grooves or channels and a series of plates on the reverse side of said frame integral with the metal forming the matrix-face and connected thereto by lugs or posts in said holes.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses GEO. PELLI-NGER.

Witnesses:

M. DITTENHOEFER, LESTER T. DITTENHOEFER.

IIC

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