US1715421A

US1715421A - Machine for making castings

Info

Publication number: US1715421A
Application number: US71927A
Authority: US
Inventors: French H Morehead
Original assignee: FREDERICK C LANGENBERG
Current assignee: FREDERICK C LANGENBERG
Priority date: 1925-11-28
Filing date: 1925-11-28
Publication date: 1929-06-04
Anticipated expiration: 1946-06-04

Description

June 4, 1929. MQREHEAD 1,715,421

MACHINE FOR MAKING CASTINGS Original Filed Nov. 28, 1925 s Shets-Sheet 1 INVEN+DVI June 4, 1929; F. H. MOREHEAD 5,

' MACHINE FOR MAKING CASTINGS Original Filed Nov. 28, 1925 s sheets-sheet 2 ,n MM MJ W June 1929- F. H. MOREHEAD mcnmr: FOR MAKING CASTINGS s Sheets-Shet 5 Original Filed Nov. 28. 1925 INVEN+DVIL Patented June 4, 1929.

UNITED STATES PATENT OFFICE.

FRENCH H. MOREHEAD, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO FREDERICK C. LANQENBERG, 0F WATERTOWN, MASSACHUSETTS.

MACHINE FOR MAKING CASTINGS.

Application filed November 28, 1925, Serial No. 71,927. Renewed October 12, 1928.

The present invention relates to machines for making castings in metallic molds,-particularly small identical castings, large numbers of which are required. The machine described in the present application is intended to practice a novel method of making castings shown and described in an application ofFrederick C. Langenbcrg, filed November 28, 1925, Serial No. 71,929. The principal steps of the method described in this application are:

1. Placing the core in one of a pair of separable cooperating mold members while the said pair are separated from each other and while the core-receiving member is in corereceiving position,

2. Closing the mold, while the core-receiving member is still in core-receiving'position,

3. Turning the mold into pouring position,

4. Pouring the metal,

5. Opening the mold while in pouring position and thereby permitting the casting to drop out, and

6. Turning the mold to the original corereceiving position.

In the machine embodying my invention, the mold is made in two-or more sections which are movable toward and from each other by means of a mechanism, preferably a fluid operated cylinder and piston which act in a plane perpendicular to the parting plane between the proximate faces of the mold members, and this entire mechanism is mounted on trunnions so that the mold may be tilted from the core-receiving position which is preferably horizontal to the pouring and ejecting position which is preferably vertical.

The machine embodying my invention is of a simple, strong construction, and is capable of rapid operation.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings, and the novel features thereof will be pointed outand clearly defined in the claims at the close of this specification.

In the drawings:

- Fig. 1 is a side elevation, partly in section, of a machine embodying the invention showing the core in place and the mold sections about to be closed.

Fig. 2 is a side elevation partly in section of the machine shown in Fig. 1.

Fig. 3 is a plan view showing the mold sections closed and turned into pouring position.

Fig. 4 is a section on line 4-1 of Fig. 3, I

looking in the the direction of the arrows.

Figs. 5, 6, 7 and 8 are diagrams showing successive positions of the mold sections during the cycle of operation.

Referring to the drawings, at A and B are shown a pair of mold sections adapted to receive the core C. The parting plane between them is indicated by the line 6-6 in Fig. 3., At D is shown the base of the machine, and at E and F two uprights, the upper ends of which are formed into bearings to receive trunnions 11 and 12 of a swinging frame in which the mold sections-A and B are slidably mounted. The mechanism for moving the mold sections toward and from each other is also carried by the. swinging frame. The swinging frame consists of a pair of side rods. 13, 13, passing through holes in the trunnions 11 and 12 and rigidly secured in place by set screws 15. (Seealso Fig. 4.) The ends of the

side rods

13, 13,

are connected by cross members 16 and. 17. These parts form the swinging frame which is capable of movement about the axis of the trunnions 11 and 12 through an arc of about 90 degrees. This movement is efiected by mechanism which will be hereinafter described. On the

side rods

13, 13, are slidably mounted two mold supporting members 18 and 19, respectively. The lower mold supporting member 18, (see Fig. 1), is adjustable vertically by means of an adjusting screw 20 which passes through the lower cross bar 17. Except for this adjustment for different sizes of mold sections, the lower mold supporting member 18 and the mold section B secured thereto are not movable lengthwise of the tilting frame. The upper mold supporting member 19 to which is secured the upper mold section A is reciprocable lengthwise of the side rods 13 by means of a piston 22 secured to a piston rod 23, the lower end of which is fastened to the mold supporting member'19. The piston 22 works in a cylinder 70 which is itself secured to a cross member 24 fastened to the two

side rods

13, 13, by set screws 25. It will therefore be seen that when air is admitted to the opposite ends of the said cylinder 70, the piston 22, piston rod 23 and upper mold supporting member 19 will be reciprocated relatively to the lower mold section B. It will also be seen that in this way the mold may be closed and the and holds it under a back pressure determined by the opening of a relief valve 32. In

'this way, the action of the apparatus is cushioned against shocks which would otherwise occur during the rapid operation of the machine. The air from the main supply placed in the position shown in Figs. 1 and 2 with the mold sections A and B separated from each other and the tilting frame in vertical position. Thereupon the operator places the core C in the lower mold section B; he then opens the valve 28 admitting air to the upper end of the cylinder 7 0 and closing the molds. Since the valve 27 is then in the exhaust position, the piston is free to move. Leaving the

valves

27 and 28 in this position, the operator opens the valve 57 which admits air to the rear end, that is, the right-hand end of Fig. 2 of the cylinder 50. At this time, valve 56 is connected with the exhaust. The piston 51 then moves to the left, as shown in Fig. 2, tilting the frame about the trunnions 11 and 12, and bringing the mold sections pipe 26, after passing through thethree-way from the position shown in Fig. 5 to the posivalve 27, goes through the pipe 33 mto a pasl'tionshown in Fig. 7. This is the pouring posagc 35 in the trunnion 11. (See Fig. 4'.) The pipe 33 is stationary and extends into a counterbore in the trunnion, thereby permitting the trunnion to swing on its axis while the pipe 33 is stationary. The passage 35 in the trunnion is connected with a pipe 36 which extends along the side bar 13 of the swinging frame and enters the lower end of the cylinder 70. (See Fig. 1.) Likewise, the three-way valve 28 is connected by the pipe 38 to the opposite trunnion 12. From the trunnion it passes through the pipe 39 to the upper end of the cylinder 70. It will therefore be seen that when the valve 28 is in a position shown in Fig. 3, the upper end of the cylinder is vented to the atmosphere through the exhaust tank 31. Therefore, when the valve 27 is moved to the position shown in Fig. 3, air under pressure is admitted through the main pipe 33, the trunnion 11, and pipe 36, to the underside of the piston 22.

The swinging of the swinging frame about the trunnions 11 and 12 is effected by a cylinder 50 in which operates a piston '51 secured to the inner end of the piston rod 52. The cylinder 50 is secured to the frame of the machine and the piston rod 52 is connected to a crosshead 71 which moves on suitable guides 53 secured to the frame. The crosshead 71 is connectedto a link'54 which in turn is connected to the lower end of an arm 55 fixed to the trunnion 12. It will therefore be seen that movement of the piston 51 will swing the swinging frame through an arc of substantially 90 degrees. The cylinder 50 is operated by compressed air received from the main supply pipe 26 and controlled by two three-way valves 56 and 57. These valves are connected by pipes 58 and 59 with the exhaust tank 31 already described. The valve 56 is connected by the pipe 60 to the front end of the cylinder 50 and the valve 57 is connected by the pipe 62 with the back end a of the said cylinder.

In operating the machine, the parts are sition. The metal is then poured. The operator then places the valve 28 in the exhaust position and moves the valve 27 to admit air to the lower side of piston 22 in cylinder 23,

In the drawings I have shown and in this specification described a series of hand-operated valves for admitting compressed air successively to the two cylinders which 0 crate the machine, but I do not intend to limlt myself to the use of hand valves or to a plurality of valves for this purpose.

What I claim is- 1. In a machine for making castings, a pair of mold sections, a frame supporting said mold sections and permitting movement of one mold section toward and from the other, means for tilting said frame and means carried by the said frame for producing said movement of said mold section.

2. In a machine for making castings, a pair of mold sections, a swinging frame supporting said mold sections, means carried by said frame for moving the mold sections toward and from each other with a yielding pressure.

3. In a machine for making castings, a pair of mold sections, a frame supporting said mold sections and permitting movement of one mold section toward and from the other, means carried by said frame and acting at right angles to the parting plane of the mold sections for moving one of the mold sections towards the other, and means for tilting the said frame.

4. In a machine for making castings, a pair of mold sections, a frame su orting said mold sections, trunnions for saiiffi'aine, means carried by the frame for moving the mold sections toward and from each other and lneans acting on the trunnions for tilting the rame.

5. In a machine for making castings, a pair 132 of mold sections, a frame supporting said mold sections, trunnions for said frame, a fluid pressure cylinder and piston carried by said frame and acting on one of said mold sections to move it toward and from the other, there being passages through the trunnions and connecting the said cylinder with a source of fluid pressure supply and means for tilting said frame.

6. In a machine for making castings, a pair of mold sections, a frame supporting said mold sections, trunnions for said frame, afluid pressure cylinder and piston carried by said frame and acting on one of said mold sections to move it toward and from the other, there being passages through the trunnions connecting the said cylinder with a source of fluid pressure supply, and a second fluid pressure cylinder and piston operating on said trunnion to tilt the said frame. 1

In testimony whereof I aflix my signature.

' FRENCH H. MOREHEAD.