US1351871A - Molding-machine - Google Patents

Description

E. A. PRIDMORE.

MOLDING MACHINE.

APPLICATION FILED JULY 9, 1909. nmgwso NOV. 4, 1918.

3 SHEETS-SHEET I.

Patented Sept. 7, 1920.

E. A. PRlDMORE- MOLDING MACHINE.

APPUCATION FILED JULY 9. 1909. RENEWED NOV. 4, 1918.

El 8 H E. A. PRIDMORE.

MOLDING MACHINE. APPLICATIION FILED JULY 9. I909. RENEWED NOV. 4, 1918.

3 SHEETS-SHEET 3.

PatentedSept. 7, 1920.

PATENT OFFICE.

EDWARD .A. PRIDMORE, OF LA GRANGE, ILLINOIS.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Sept. 7, 1920.

Application filed July 9, 1909, Serial No. 506,715. Renewed November 4, 1918. Serial No. 261,160.

To all whom it may concern:

Be it known that I, EDWARD A. PRIDMORE, a citizen of the United States, residing at La Grange, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in lVIolding-h iachines, of which the following is a specification.

This invention relates to molding machines, and has for its objectto provide a new and improved device of this descrip tion.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a side'elevation of a machine embodying the invention;

Fig. 2 is a front elevation of the device shown in Fig. 1; x

' Fig. 3 is a sectional view through one of the cylinders;

Fig. 4; is a plan view of the flask rests;

Fig. 5 is a sectionalrview showing the valve controlling the vibrator;

Fig. 6 is a view with parts broken away showing the pattern carrier stop.

Like numerals refer to like parts throughout the several figures.

As shown in the drawing, a pattern carrier 1 is movably connected to the frame 2 of the machine on the rod or cross piece 3. '1 he pattern or patterns are mounted upon the pattern carrier in any desired manner, and the pattern carrier when in its ramming position is supported upon the frame as shown in full lines in Fig. 1. In Fig. 2 I have shown two flasks, 1 and 5, one the cope and the other the drag. These flasks are provided with bottom or presser boards 6 and '7 which are arranged so that they can be forced into the flasks. Means are provided for ramming the flasks by applying pressure to these bottom boards. As herein shown, this pressure is applied by means of the power cylinders 8 and 9, which are provided with pistons 10 to which are connocted engaging parts 11 which engage the bottom boards of the flasks. The pistons in the cylinders may be operated by any suitable power fluid such, for example, as compressed air, which power fluid is admitted through the pipe 12.' The admission of power fluid to the cylinders may be controlled in any desired manner. As shown in the drawing, I provide a valve 13 for.

each cylinder so that the cylinders can be independently controlled if desired. As illustrated the pistons 10 of the cylinders are arranged so as to be retracted by some suitable retracting device. One form of this retracting device is illustr. ted in Fig. 3, wherein a spring 14 is connected to the upper end of the cylinder 8 in any desired manner, as by means of a bolt 15, the other end being connected to the piston 10. The spring is expanded when the piston is moved down to compress the sand in the mold, and when the air is released from the cylinder the spring retracts the piston. Some suitable limiting device is provided which limits the movement of the piston, as, for example, the links 16 and 17, one of which is fastened to the cylinder and the other to the piston, but which are looped through each other so that when the piston is moved a predetermined distance its fur ther movement will be prevented.

The c linders 8 and 9 are mounted upon a moving or rocking frame 18, which er:- tends across the top of the machine and which has two branches at the sides of the machine pivoted thereto some convenient points, as at the points 19. By this means the cylinders can be-moved to one side, as shown in'Fig. 1, while the flasks are being placed in position and filled with sand, and may then be moved. into position over the flasks so as to be in proper position to com press the sand therein. The frame 18 may be provided with one or more suitable handles 20, by which it may be easily manipulated. The branches of the frame 18 have attached thereto springs 21 which are at tachcd to a fixed part on the frame of the machine, and which tend to hold the rocking frame in its operative position. The side branches of the rocking frame 18 are pro vided with projections 23 which engage stops 22 on the machine frame so as to limit the movement of the rocking frame. The side branches of the rocking frame are also bent to one side or indented, as shown at 24, because of the handles 25 on the pattern carrier or flask-receiving part.

In view of the fact that the two cylinders alinement. This would usually be'the case,

' terns are withdrawn.

independently and pivotally mounted upon position. .vided a single clamp for the several bottom because of the difficulty of having the sand in the different flasks the same in amount and density, and also because the patterns may be of different sizes. After the flasks have been rammed by means of he pistons in the cylinders, and the rocking frame with the cylinders is moved to one side, thepattern carrier andflasks are turned over, moving about the crosspiece 3. A suitable clamp is provided for holding the bottom boards in As herein shown, there is pro boards. This clamp consists of a clamping member'QG which is preferably provided with projections 27 to engage the bottom boards, the clamping member being bent so as to project along the sides of theft-asks, and being provided "with the handles 28 which, when'the clamping member is in its clamping position, are opposite the handles 25 associated with the pattern carrier (see Fig. 2). It will be seen that by grasping both of these handles the clamping member will be forced down upon the bottom bo rds, and the bottom boards and flasks clamped to the flask support or pattern carrier. The clamping member is connected near its mid.- dle with the supporting piece which is pivoted to thecross piece 3 of the machine.

The clam oing member being su aorted upon r r. a

the cross piece 3 at one point, and having the supporting piece connected intermediate the flasks, is not held rigidly in position but has a lateral or rocking movement so that one side may move farther down than the other, thus insuring the clamping member engaging all of the bottom boards when they are out of alinement. The parts 30, by means of which the pattern carrier is connected to the cross piece 3, are provided with projections or cranks 31 to which'are connected springs 32, said springs being con nected-to a fixed part of the machine frame.

These springs act to assist in the turning movement of the pattern carrier, and are made adjustable.

The flask rests 3d are provided for the flasks when they are moved from their ramming position to the position where the pat- These flask rests are a support 35 which is pivotally connected to a portion of a sliding fame 36 by means of a bolt 36. Each flask rest has the two upwardly projecting sides 37. The flask rests are connected to the support by means of bolts 38 which pass therethrough. The part of each rest through which the bolt into frictional engagement with the rest by means-of a spring 41. it will be noted that .the bolts. which connect the flask rests to the support 35 and the bolt which connects the support to the frame are substantially parallel, and are at right angles to the support 35. The support 35 has a tapered frictional engaging part which projects into a tapered opening in the frame 76 wl is frictionally pressed against the said frame by the spring 48. It will thus be seen that each flask restis free to move about one of the bolts 38 as a pivot, and that the suppr rt is free to move about the bolt as a pivot,

[)0 and that both the flask rests and the support move about substantially parallel axes.

It will be seen that by means of this construction the flask rests automatically adjust themselves to the various" positions of the bottom boards when not in alinenient, that is, when one is forced farther into the flask than the other. This automatic adjustment is necessary to properly withdraw the patterns from the flasks. The ends of the flask rests are open so that the clamping member rests in them between the side pieces 37 when the flasks are on the flask r ts. The flask rests are connected to the sliding frame 36 which slides on the guides s: ported upon frame ofthe machine. T

foot piece, making it unnecessary to apply the foot directly to the arms,

are connected to the sliding frame 236 by the connection 5%. The arms 53 have connected therewith cranks 55 to which are con nected the springs 56 fastened to some suitable part of the frame. hen the pattern carrieris rotated 01' rocked about the rod 8 so as to be moved over to cause the flasks to engage the flask rests, the parts engage stops 33 on the frame and stop tl e down ward movement of the pattern carrier. The springs 56 through crank 55, arms '53 a d sliding frame 36 tend to press the flask rests against the fl'askslVhen it is desired to withdraw the patterns, the foot pieces 52 are pressed by an operator at each side of the machine placing a foot thereon, so as to move the sliding frame 36, which carries with it the flask rests and the flasks.

The patterncarrier is provided with a ti brator' H which may be operated same fluid which operates the pistons cylinders; This vibrator is controll a 'ali'e l5 which is moved to ach it t tuating fluid, such as air, to the vi during some part of the'movementof the flasks from their ramming position to the position where the patterns are withcrawn.

As shown in the drawings the valve works in a cylinder Q6. The air or other power fluid enters the cylinder by the pipe 47 and passes out of the cylinder by pipe 48 to the vibrator. The valved?) has a valve stem at, the end of whichis inposition to be engaged by one of the projecting parts 33 connected with the pattern carrier said projection operating said valve before striking its stop 33. The valve is normally held against the seat by the spring 50. .Vhen the part 33 strikes the valve stem it moves the valve from its seat and the air passes by the valve into the pipe 48, and thence to the vibrator.

The entire machine is mounted upon three wheels, there being two wheels 57 in alinement at the rear of the machine, and a single wheel 58 at the front or the machine, the wheel 58 being located between the guides for the sliding frame, on which the flask rests are carried.

The use and operationrof the invention are as follows:

When it is desired to form the molds, the cylinders 8 and 9 are moved to one side and the pattern carrier moved to the position shown in full ines in Fig. 1. The flasks are then filled with sand, and the bottom or presser boards placed in position. The cylinders are then moved to their operative positions above the bottom or presser boards, power fluid is admitted to them, and the pistons moved downwardly so as to engage the'bottom boards and press them into the flasks. The air is then released from the cylinders and the retracting devices draw up the pistons. The cylinders are then moved to one side and the clamping devices moved so that the clamping member engages the bottom boards. The handles on the clamping member and on'the pattern carrier are then grasped and the pattern carrier and flasks moved over until the flasks engage the flask rests. The clamping member is then released and rests on' th'e'flask rests. The foot pieces are'then pressed so as to move the flask rests and flasks downwardly so as to withdraw the pattern. The pattern carrier is now moved back to its original position and the flasks removed from the flask rests.

By means of this construction a power ramming device is used in connection with a turnover molding machine,the ramming device'located above the machine.

I claim:

1. The combination with a molding machine of a frame, pattern carrier connected therewith, adapted to spport a flask and pattern, a movable frame pivot-ally con- (ted with the frame of the machine, a projection said frame, a cylinder and piston mounted upon said movable frame, a stop on the molding machine frame, the projection and stop arranged so that when brought into engagement the piston and cylinder are directly over said flask.

2. A molding machine comprising a frame, a pattern carrier mounted thereon adapted to support a plurality of patterns and flasks, a plurality of cylinders above the pattern carrier, each provided with a piston, means associated with the pistons for ramming the sand in the flasks and means for simultaneously or separately controlling said pistons so that said flasks may be rammed separately or simultaneously.

3. A molding machine comprising a frame, supporting wheels thereon, a pattern carrier mounted thereon adapted to support a pattern and flask, a cylinder and piston above the pattern carrier, a moving framc with which said cylinder is connected, said said frame pivotally connected to the frame of the molding machine, the axis about which said pivotal frame moves being sub stantially at right angles to the axes of said wheels.

d. A molding machine comprising a frame, a pattern carrier, patterns carried thereby said pattern carrier pivotally connected therewith and adapted to be moved to an inverted position when it is desired to withdraw the patterns from the flasks, a plurality of flasks cooperating with said patterns, bottom boards for said flasks and a single clamping member adapted to vengage the bottom boards of all of said flasks while the flasks are being inverted.

A molding machine comprising a frame, a pattern carrier, patterns carried thereby, said pattern carrier pivotally connected therewith and adapted to be moved to an inverted position when it is desired to withdraw the patterns from the flasks, a plurality of flasks cooperating with the patterns used with the machine, bottom boards for said flasks and a single clamping member. adapted to engage the bottom boards of all of said flasks while the flasks are being inverted, said clamping member pivotally connected between its ends with a stationary part of the machine.

6. A molding machine comprising a frame, a pattern carrier, patterns carried thereby, said pattern carrier pivotally connected therewith and adapted to be moved to an inverted position when it is desired to withdraw the patterns from the flasks, a plurality of flasks cooperating with the patterns used with the machine, bottom boards for said flasks, a single clamping member adapted to engage the bottom boards of all of said flasks while the flasks are being in verted, and means for causing the clamping member to engage the bottom boards when said bottom boards are on diflerent levels.

7. A molding machine comprising a frame, a pattern carrier pivotally connected therewith and adapted to be turned from one side of its pivotal connection to the other, said pattern carrier adapted to re- 7 ceive a plurality of patterns, a plurality of separate flasks for said patterns, separate bottom boards for said flasks, means for forcing .the bottom boards into the flasks, a plurality of flask. rests adapted to receive the flasks when the pattern carrier is moved to the pattern withdrawing position, said rests independently adjustable so as to compensate for the difference in level of the bottom boards ofv the flasks. I

8. A molding machine comprising a frame, a pattern carrier pivotally connected therewith and adapted to be turned from one side of itspivotal connection to the other, said pattern carrier adapted to receive a plurality of' patterns, a plurality of separate flasks for said patterns, separate bottom boards for said flasks, means for therewith and adapted to be turned from one side of its pivotal connection to the therewith and adapted to be moved from other, said pattern carrier adapted to receive a plurality of patterns, a plurality of separate flasks for said patterns, separate bottom boards for said flasks, means for forcing the bottom boards into the flasks, a plurality of flask rests adapted to receive the flaskswhen the pattern carrier is moved to the pattern withdrawing position, said rests independently adjustable so as to compensate for the difference in level of the bottom boards of the flasks, a supporting part to which said rests are pivotally connected, said supporting part pivotally connected to a sliding member, the pivots of the flask rests and supporting part being substantially parallel, and frictional engaging devices associated with the flask rests and adapted to resist their adjusting movement. 7

10. A molding machine comprising a frame, a pattern carrier pivotally connected one side of the pivotal point to the other .in moving it from its ramming position to the position for withdrawing the pattern from the flask, a vibrator associated with said pattern carrier, and means. for automatically setting the said vibrator in op eration during the movement of the pattern carrier from the ramming position to the position for withdrawing the pattern from the flask.

11. A molding machine comprising a frame, a pattern carrier pivotally connected therewith and adapted to be moved from one side of its pivotal point to the other in moving it from its ramming position to the position for withdrawing the pattern from the flask, a flask rest adapted to receive the flask into which the pattern projects, a sliding frame for moving the flask rest so as to withdraw the pattern from the flask, two separated guides associated with the machine upon which said sliding frame is mounted, three wheels upon which the machine is supported, one of said wheels located between said guides.

12. A molding machine comprising a frame, a pattern carrier pivotally connected with said frame so that it may be'moved into an inverted position when it is desired to withdraw the pattern from the flask, a stop connected with said pattern carrier and adapted to engage a fixed part when the pattern carrier isinverted-so as to limit its movement, a vibrator associated with the pattern carrier, a valve controlling said vibrator, said valve being actuated by said stop when the pattern carrier is moved to its inverted position.

13. A molding machine 7 comprising a power cylinder, a piston in said power cylinder, a movable frame upon which said power cylinder is supported, means associated with the piston of said power cylinder for ramming the sand in the flask when the power cylinder is in its operative position, two links within said power cylinder, one connected with the piston and the other to-the cylinder, said links provided with stop pieces adapted to engage each other when the links are moved relatively a predetermined distance and a spring connected at one end with ,said cylinder and at the other end with said piston.

14. A molding machine comprising a frame, a pattern carrier mounted thereon adapted to support a plurality of patterns and flasks, a plurality of cylinders above the pattern carrier, each cylinder provided with a piston, a movable frame upon which said cylinders are mounted in alinement, a retracting spring within each cylinder connected with the cylinder and piston and means for operating said pistons separately or simultaneously, so as to produce an even ramming of the flasks.

15. A mol ling machine embodying therein a stationary frame, a vertically depressible frame, a table supported thereby, adjacent one end of said frame, vertical guides for the other end of said frame, an angular automatically raised, and additional suplever mounted on said stationary frame, a port is afforded said table.

link connecting one arm of said lever with EDWARD A. PRIDMORE. said depressible frame adjacent said table, WVitnesses: 5 and a spring acting on the other arm of EDNA K. REYNoLDs,

said lever whereby said depressible frame is MINNIE M. LINDENAU.

Images