US932402A

US932402A - Machine for forming cores for pipe-sockets.

Info

Publication number: US932402A
Application number: US41657108A
Authority: US
Inventors: William H Larrison
Original assignee: FLORENCE IRON WORKS
Current assignee: FLORENCE IRON WORKS
Priority date: 1908-02-18
Filing date: 1908-02-18
Publication date: 1909-08-24
Anticipated expiration: 1926-08-24

Description

w. H. LARRISON. MACHINE FOR FORMING OORES FOR PIPE SOCKETS.

APPLIOATION FILED FEB. 18, 190B.

Patented Aug. 24, 1 909.

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W. H. LARRISON. MACHINE FOR FORMING GORES'FOR PIPE SOCKETS APPLICATION FILED FEB. 18, 1908. 932,402. Patented Aug. 24,1909. a SHEETS-SHEET 2.

INVENTORI W. H. LARRISON.

MACHINE FOR, FORMING 00338 FOR PIPE SOCKETS.

APPLICATION FILED PEB.18, 190s.

Patented Aug. 24, 1909.

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JTICf m 29/ 52 Hill" ZZZ UNITED STATES PATENT orrion.

WILLIAM H. LARRISON, 0F FLORENCE, NEW JERSEY,- ASSIGNOR TO FLORENCE IRON WORKS, 0F FLORENCE, NEW JERSEY, A CORPORATION OF NEW JERSEY.-

MACHINE FOR FORMING OOBES FOR PIPE-SOCKETS.

T 0 all whom it may concern:

Be it known that I, VVILLIAM II. LARRISON, of Florence, in the county of Burlington and State of New Jersey, have invented certain new and useful Improvements in Machines for Forming Cores for Pipe-Sockets, whereof the following is a specification, reference being had to the accompanying drawings.

The general purposes of my invention are to provide means for forcibly compressing the material, (usually sand) out of which such cores are made, so as to mold it into a dense and coherent mass, to afiord ready access to the molding parts for the introduction of material and removal of the cores, and to so control the pressure Producing devices and their cooperating elements as to prevent injury from untimely action.

In the accompanying drawings, Figure I, is a front elevation of the machine. Fig. II, is an end elevation as seen from the left hand side of Fig. I. Fig. III,is a corresponding elevation as seen from the right hand end of Fig. I. To avoid confusion, in these two last mentioned figures, certain remote parts which in each instance would be to a great extent concealed by reason of the intervention of parts nearer the observer have been indicated. Fig. IV, is a vertical sectional view on the line IV, IV, of Fig. I. Figs. V, and VI, are transverse sectional views respectively on the lines V, V, and VI, VI of Fig. IV. Figs. VII, and VIII, are views in perspective of the interior elements of the mold proper.

Broadly speaking, the machine comprises the following main groups of elements; a mold whose surrounding wall is formed in two separable parts, hinged together, and whose interior is provided with a mold-ring having a separable closed extension piece; a

normally stationary plunger, of annular crosssection, supported upon a swinging frame; and hydraulic pressure mechanism, whereby the mold and its contents may be forced against said plunger.

Referring to the drawings, 1, represents the base, which is prismatic in form, having sides which converge toward the upper portion, and which is bolted to the

girders

2, 2. The base is provided at its ends, with horizontally projecting

trunnions

3, 3, which support the swinging frame, comprising

uprights

4, 4, and a horizontal cross-head 6.

The upright-s consist of channel irons, the

Specification of Letters Patent. Patented Aug 24 1909.

Application filed February 18, 1908.

Serial No. 416,571.

upper portions of whose proximate surfaces are provided with downwardly facing serrations 5.

The cross head 6, is composed of two similar channel irons connected at their ends by means of bolts 7 which pass through dis tance pieces 8, having flanges 9, which fit snugly in the channels of the uprights 4. The cross head is clamped in position by means of a longitudinal rod 10, having threaded end portions which engage in suitable openings in the distance pieces, the uprights 4, being slotted, as shown at 11, to permit the cross head and its rod 10, to be shifted vertically. The cross head is provided with a handle 12, by means of which the frame may be swung upon its trunnions. T -shaped blocks 13 are mounted on the cross head, the downwardly depending portions 14, of said blocks being serrated in such relation to the serrations 5, of the uprights, as to engage therewith and thus afford a firm abutment against upward thrust.

At the lower portion of one of the up rights 4, is rigidly secured a laterally projecting arm 16, which is pivoted to lugs 17, mounted on the bottom of a plunger 18, which engages with a strong spring 19, shown in dotted lines, said spring being con tained within a casing 20, mounted upon one end of the base 1.

At the longitudinal center of the cross head 6, is secured the downwardly depending annular plunger 21, having an orifice 22, to permit the escape of air from the interior, during the act of compression. At the central portion of the base 1, which is subjacent to this annular plunger 21, is mounted a stationary cylindrical piston 25, having a central duct 26, to admit the hydraulic pressure medium, and upon this piston is fitted a vertically movable bottom cylinder 27, upon the top of which the base plate 29, of the mold cylinder 28, is secured. This mold-cylinder 28, is longitudinally divided into two similar parts the walls being reinforced by the

ribs

31, 32, 33, which respectively afford seats for a-pin 34, whereby the two halves of the mold are pivotally secured together, said pin being fixedly mounted in the base plate 29. One of said ribs also affords a seat for a pin 35, upon which a hasp 36, is pivotally mounted, said hasp engaging with a lug 37, upon the adjacent face of the other half cylinder. At the bottom of the mold cylinder is an inwardly projecting annular flange 30, which fits closely around a flat boss 42, on the base-plate 29. The in terior surface of the mold cylinder has the configuration shown, that is to say, the sides extend vertically downward three-fourths of the total depth, at which region an angular groove 40, is formed, and below this groove the surface extends vertically down to the flange 30.

The internal molding element comprises a ring 4 1-, which rests upon the flange 30, and has an external projecting flange 15, which fits snugly within the walls of the mold cyl inder 28, when the two parts of the latter are closed and locked together. By reference to the cross section of the ring shown in Fig. IV, it will be seen that the exterior surface is slightly conical and that the inte rior opening thereof flares outwardly at its upper portion, so that the upper extremity is reduced to a narrow edge 46. This edge receives and supports the closed extension piece 50, whose lower extremity converges inwardly, as shown at 51, a horizontal shoulder 52, being formed above the converging portion, which shoulder rests upon the edge 46-, of the ring as. The vertical depth of the extension piece above said shoulder is substantially equal to the vertical depth of the cavity between the external surface of the ring 14:, and the adjacent surrounding wall of the mold cylinder 28, so that the total interspace can contain a bulk of material which. in its uncompressed form, is about twice the depth of the core to be formed therefrom. The lower edge of the annular plunger 21, fits snugly in this interspace, and hence when the mold is forced upward against said plunger, a complete compression of the material contained in the interspace will occur. As before stated, the mold is thus actuated by means of hydraulic pressure applied to the cylinder 27, and the con trolling'mechanism for the hydraulic pressure system will now be described. Y

The duct 26, in the stationary piston 25, communicates with a pipe 60, which leads to a valve box 61, to which the pressure supplying medium is admitted, by means of the pipe 68, connected with the source of pressure, not shown; the exhaust pipe is indieated' at 62;. The valve box 61, is provided with a rotary valve, whose stem 63, extends vertically upward. On this stem is actuating lever 64, which is prolonged beyond the point of attachment with the stem, and carries a segment 65, having a downwardly projecting flange 66. A stop pin 67, limits the movement of the lever in one direction. Mounted upon one of the uprights 4, at 70, is a forwardly projecting guard arm 71, having a longitudinally curved and laterally extended flat upper surface 72. At a point immediately adjacent to the upright 4, a

vertical notch 73, is formed in the upper surface of the guard arm, which notch receives the downwardly depending flange 66, of the segment, carried by the controlling lever 6%., of the valve. It will thus be seen that when the swinging frame is in a true vertical position, so that the plunger is centered accurately above the mold, the flange 66, of the segment 65, is received freely within the notch 73, and hence the lever can be shifted in either direction. The frame, however, cannot be moved while the flange 66, is thus seated within the notch 7 This engagement of the rib within the notch, corresponds to the positions of the valve during the whole period from the inception of its opening until it is completely opened. Hence, while the valve is wholly or partly opened, the frame cannot be swung from the vertical, and any danger of forcing the hydraulic cylinder upward when the plunger is not accurately centered above the mold, is absolutely prevented. When, however, the valve is completely closed by swinging the lever 64, until it abuts against the stop 67, the flange 66, is withdrawn from the notch 7 3, and hence the frame can be swung upon its trunnions. During this swinging movement, however, the end of the flange 66, upon the segment of the actuating lever abuts against the side of guard arm 71, and so long as this position of the parts continues the lever cannot be moved, being locked in closed position, between the stop 67, and the guard arm 71. By this mutual interlocking of the frame on the one hand, and the controlling lever of the hydraulic system on the other, careless manipulation of the apparatus and injury are avoided.

In the regular operation of the apparatus, after the compression of the core has been effected, the cylinder 27, is permitted to descend, and the frame is swung from beneath the plunger, the mold cylinder being opened to permit the removal of the core and internal molding elements, after which theparts are replaced and the mold is recharged. The swinging of the frame is against the tensions of the spring 19, whose counterbalancing action prevents the frame from falling or tilting too far, and also lessens the effort necessary to restore it to normal position.

Having thus described my improvements in their complete embodiment, I, claim 1. The combination with the base and with the piston and cylinder carried thereby and provided' with actuating means; of a mold-cylinder open at the top; a moldring mounted in said cylinder;-a swingingframe; and an annular plunger mounted on said frame in operative relation to the mold cylinder.

2. The combination with the annular pliun ger; of a two part moldcylind'er 5 a moldring mounted therein and provided with an annular flange around its lower periphery, which fits snugly against the inner surface of the mold-cylinder; a cylindrical extension piece having a diameter similar to the diameter of the upper extremity of the moldring and carried by the mold-ring; and actuating devices for effecting relative movement of said plunger and said mold-cylinder.

3. The combination with the annular plunger; of a two part mold cylinder; a moldring mounted therein, having an annular flange around its lower periphery which fits snugly against the inner surface of the moldcylinder and having an upwardly converging exterior surface; a cylindrical extension piece having a shoulder adapted to rest upon the upper edge of the mold-ring, the external surface of the extension piece being flush with the external surface of the mold ring at the upper extremity of the latter; an annular plunger fitting snugly in the interspace between the mold-cylinder and the extension piece; and actuating devices for effect-ing relative movement of said plunger and said mold-cylinder.

i. The combination of the two-part moldcylinder; of a mold-ring provided with an annular flange around its lower periphery, which fits snugly against the inner surface of the mold-cylinder, said mold-ring having its entire exterior surface converging upwardly and having the upper portion of its interior surface flaring outwardly, whereby a narrow edge is formed at the upper periphery of said mold-ring; a cylindrical extension piece having an inwardly converging surface at its lower extremity; a shoulder immediately above said converging surface, adapted to rest upon the narrow edge of the mold-ring, the outer surface of said extension piece being flush with the outer surface of the mold-ring at the upper extremity of the latter; an annular plunger fitting snugly in the interspace between the mold-cylinder and the extension piece; and actuating devices for efiecting relative move ment of said plunger and said mold-cylinder.

In testimony whereof, I have hereunto signed my name, at Philadelphia Pennsylvania, this thirtieth day of January 1908.

WILLIAM H. LARRISON.

WVitnesses:

JAMES H. BELL, E. L. FULLERTON.