US532213A - Molding-machine - Google Patents

Description

(No Model.) z'sheets-sheet 1.

W. F. RICHARDS.

MOLDING MACHINE.

No. 532,213. Patented Jan. 8, 1895.

(No Model.) 2 sneetsf-sheet 2.

W. F. RICHARDS. MOLDINQMAGHINB.

No. 532,213. Patented Jan. 8, 1895.-

.gnu @f vIC UNITED STATES.Y

PATENT Orricn..

FILLARD F. RICHARDS, OF BUFFALO, NEW' YORK.

MOLDING- MACHINE.

SPECIFICATION forming part of Letters Patent N o. 532,213, dated January 8, 1895.

Application nea January s, 1894.v sain No. 496,037. or@ model.)

To all whom it may concern: g

Be it known that l, WILLARD F. RICHARDS, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and 'useful Improvements in Molding-Machines, of which the following is a specification.

This invention has reference to molding machines of that class which contain an abutment or stationary ramming block, a table or support for the flask lto be rammed, ar-

. ranged underneath the said block and a follower whereby the flask is moved toward the block for rarnming the sand in the same.

My invention relates more particularly to machines of this kind in which the flask support consists of a rotary table, whereby a number of flasks may be successively brought under the ramming block.

' In the accompanying drawings, consisting of two sheets:-Figure l is a sectional elevation of my improved molding machine, showing the followers in their normal positions. Fig. 2 is a horizontal section of the machine in line 2 2, Fig. l. Fig. 3 is a sectional elevation of the machine, the section being taken at right anglesto Fig. 1, and one of the followers being lowered to the position in which the pattern is stripped from the flask. Fig. 4 is a vertical longitudinal section, on an enlarged scale, of the outer position of one of the slides and adjacent parts. Fig. 5 is a Y cross section in line 5 5, Fig. 4.

Like letters of reference refer to like parts in the several figures.

A is the stationary bed or base of the machine, and A A2 are two'upright rods or standards secured at their lower ends to the bed and connected at their upper ends by a cross pie'ceAs.

B is the horizontal flask-supporting ltable arranged to turn on the rod A and consisting of a number of upright, rectangular chambers or casings B', preferably four, as shown. These chambers are carried by a central hub or sleeve B2 journaled on afixed column O which surrounds the rod Af. The hub B2 is preferably supported upon the base of this column by a ball bearing d.

A horizontal follower E is arranged to move vertically in each of the chambers B and is provided on its under side with a depending Vactuating rod e.

.lower rod.

with an opening for the passage of the fol- The follower of each chamber is Each chamberB is open at l its upper end and provided in its lower end.

guided o n upright bars or rails g, arranged in the corners of the chamber and iitting into `angular guides g extending downward from the four corners of the follower, as shown in Fig. 2.

H represents open rectangular supporting plates or lframes resting upon pins h projecting above the upper edges of the chambers and c' are the usual stripping plates secured to the upper sides of said supporting plates.

'J is one of the patterns which is secured Lto the upper side of the follower by any suitable fastening, and K is a half flask resting upon the stripping plate z' and secured to the latter by any ordinary means. The stripping plates -have the usual openings conforming to the contour of the patterns, through which the latter project into the flask.

L represents the abutment or stationary ramming block secured to the under side of the cross piece A3 and arranged directly over the circular path traversed by the chambers B', so that the several fiask-supports may be successively brought under. the ramming block by turning the rotary table B.

M represents an upright actuating cylinder arranged below the table B. fm, is the piston arranged in this cylinder and m its piston rod which passes upward through the stuffing box of the cylinder and has its upper end. 1ocated in the circular path of travel of the rods of the several followers E, so that the lower Vend of any one of the follower rods may be brought directly opposite or in line with the upper end of said piston rod, as shown in Fig. 1, in which position the upward movement of the piston rod is imparted to the follower rod standing above it. The piston of IOO levers bear loosely against the under side of the follower and are preferably provided at their ends with bearing rollers for reducing the friction. The lower vertical arms of the levers are connected by links q with a cross head Q which moves in radial guides q2 arranged within the chamber B below the follower. y

R representsradial slides arranged between the guides q2 and bearing loosely with their rear ends against the inner ends of radial adjusting screws or bolts g3 arranged in the cross head Q, so that the movement of the slide is imparted to the cross head and vice versa. The inner ends of the several slides R pass through openings formed in the adjacent walls of the chambers B and are provided with anti-friction rollers lr which bear against the face of a stationary horizontal Cam S secured to the column C, the adjacent portion of the hub of the rotary table being recessed or out away to clear this cam. The slides R are each provided with a longitudinal slot r for the passage of the follower rods.

The wide, concentric portion of the cam S is made of such a radius that when a slide R bears against such wide portion, the slide is in its outermost position, and the upper arms of the bell crank levers connected with said slide, stand in a substantially horizontal position so as to support the follower resting thereon, in the normal position shown in Fig. 1. The narrow portion of the cam is made of such a radius that when a slide rides over the same, it is allowed to move inwardly under the weight of the follower eX- erted on the slide through the bell crank levers and the cross head Q thereby permitting the follower to descend suii'iciently to withdraw the pattern from the mold. The narrow portion of the cam is preferably arranged toward the rear side of the machine, as shown, so that the followers are allowed to descend to the position for stripping the pattern on that side of the machine only.

The rotary table is locked in place, after bringing one of the followers under the rarnming block, by any suitable means. A spring catch operated by a treadle T is preferably employed for this purpose.

In the operation of the machine, when the rotary table is turned so that one of the followers E stands under the ramming block the slide R co-operatin g with said follower is in its outermost position and the follower is sustained in the position shown in Fig. 1, being nearly flush with the upper edge of its chamber. The pattern secured to the follower projects through the opening in the stripping plate and the supporting plate of the latter and the half flask rests upon the stripping plate, having been previously filled with sand, in the usual manner. Upon admitting steam to the actuating cylinder, the piston in the latter rises and strikes the lower end of the follower rod, moving the follower, together with the superposed supporting frame, the stripping plate and the fiask, toward the ramming block, thereby forcing the sand in the flask against the ramming block and packing it around the pattern. Upon now allowing the steam to exhaust from the actuating cylinder, the follower with the superposed parts descends, to the position shown in Fig. 1, when its further descent is prevented by the upper arms of the elbowlevers o. In this position of the parts, the frame which supports the stripping plate and half flask rests upon the pins h. The rotary table is now unlocked and given a quarter turn in the direction of the arrow in Fig. 2, so as to bring the partially lowered follower on the rear side of the machine and the next follower under the ramming block. This quar ter turn of the table brings the slide of said follower opposite the narrow portion of the cam S, allowing the latter to move inward and the follower with the pattern attached thereto to descend to its lowermost position as shown in the right hand portion of Fig. 3, thereby withdrawing the pattern from the flask and completing the half mold. The depressed follower remains in this position until the rotary table is again shifted for presenting another unrammed flask to the ramming block, when it is again raised to its normal position by its slide riding over the wide portion of the cam S and swinging the bell crank levers into the position shown in Fig. 1. The flasks on the several followers are in this manner successively presented to the ramming block and rammed, and are then moved aside for withdrawing the pattern from the mold.

It is obvious that each follower may be provided with a single bell crank lever o, but a pair of such levers is preferably employed with each follower, as shown, to equalize the strain.

If desired, the outer ends of the slides R may bear directly against the cross heads Q, but the latter are preferably provided with the adjustable bearing screws qs. By this construction, any wear of the pivots of the links and bell crank levers can be readily taken up by adjusting the screws qs in the cross head Q, thus maintaining the desired relative position of the parts.

By the employment of -the follower-retarding devices herein shown and described, the sudden and forcible descent of the followers is prevented and breakage of the mold is obviated, and the movements of the followers `required for stripping the patterns from the flasks and again raising the followers to receive a new liask, are performed in the act of turning the rotary table, thus simplifying the operation ofthe machine.

I claim as my invention--A 1. In a molding machine, the combination with the stationary frame, a ramming block and a rotary horizontal table arranged underneath the ramming block, of a follower carried by said table and movable toward and from said block, means for actuating the fol'- IOO IIO

IZO

with the stationary frame and a ramming block, of a rotary table,a follower supported on said table and capable of moving toward and from said block, means for actuating the follower, a bell crank lever bearing with one arm against the follower, a stationary cam, and a slide operated by said cam and connected with the other arm of the bell crank lever, substantially as set forth.

3. In a molding machine, the combination with the stationary frame and a ramming block, of a rotary table, a follower supported on said table and capable of moving toward and from said block, means for actuating the follower, a bell crank lever bearing loosely with its upper end against the rear side-of the follower, a stationary cam, aslide moving in 3o radial ways secured to said table and engag-` ing against said cam and a link connecting the lower arm of the bell crank lever with said slide, substantially as set forth.

4. In a molding machine, the combination with the stationary frame and a ramming block, of a rotary table, a follower supported on said table and capable of moving toward and from said block, a bell crank lever bearing with one arm against said follower, a stationary cam, a radially movable cross head guided in ways on said table and having an adjustable bearing screw, a link' connecting said cross head with the other arm of said bell crank lever, and a radial slide bearing with one end against said cam and with its opposite end against the adj nstable screw of said cross head, substantially as set forth.

Witness my hand this 27th day of May, 1893.

WILLARD F. RICHARDS.

Witnesses:

CARL F. GEYER, EMILNEUHART.

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