US1265405A - Molding-machine. - Google Patents

Description

W. C. WALDA,

MOLDING MACHINE.

APPLICATION FILED ]AN.18.1917.

' 1,265,405. Patented May 7,1918.

4 SHEETS-SHEET 1.

IN l/E N TOR A TTORNE Y C. WALDA.

MOLDING MACHINE.

APPLICATION FILED IAN.18.1917.

Patented May 7,1918.

4 SHEETS-SHEET 2.

WITNESSES; 6 INVENT-OR 74 f Qw MZQM/ ATTORNEY W. G. WALDA.

MOLDING MACHINE.

APPLICATION .FILED JAN.18, 19x1.

Patented m 7,1918.

4 SHEETS-SHEET 3.

I I l l l l ra v 3 n. 3 1. 3 1- a. .6 NOR w, c. WALDA. MOLDING MACHJNE. APPLICATION F'ILED 1AN.1a.-.l9n.

1,265,405. Patented May 7,1918.

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W I MOM/EV WILLIAM G. WALDA, OF FORT WAYNE, TNDIANA.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed January 18, 1917. Serial No. 143,014.

To all whom it may concern:

Be it known that I, WILLIAM C. WALDA, a citizen of the United States of America, and resident of Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Molding-Machines, of which the following is a specification.

This invention relates to improvements in molding machines particularly of that class used for manipulating bench flasks and the object thereof is to afford a machine of its class having means for accurately separating the flask sections and the pattern from the mold upon the completion of the latter, the operation being commonly known as parting. And a special object is to provide means for parting the flask and pattern in such manner as to require a lesser degree of skill than is ordinarily required in making a mold, and to effect accurately made molds with greater rapidity than is ordinarily attained where the parting is done by hand manipulation.

These objects are accomplished by the construction illustrated in the accompanying drawings, in which Figure 1 is a perspective view of the device;

Fig. 2 is a similar view of the same including the bottom board and lower portion of a flask in place, and showing also the parting posts in elevated position;

Fig. 3 is a front elevation of the device upon a larger scale than the former figures;

Fig. 4 is a side elevation partly in vertical section in a plane extending through the character X of Fig. 3.

. Fig. 5 is a plan view of the device;

Fig. 6 is a perspective view of the upper portion of a flask; and

Fig. 7 is a perspective view of a pattern used in making molds.

Similar characters of reference indicate corresponding parts throughout the several views and referring now to the same:

1 is a frame, horizontally disposed and supported by "three legs (2), (3) and (4) respectively which are bolted thereto. The leg (2) extends upwardly beyond the frame (1) and supports at its upper end a shelf (5) intended for lodgment of hand tools and instruments used by the operator. Extending forwardly from the leg (2) between the shelf and frame are adjustable brackets (6) which afi'ord temporary support for the cope (7), or upper portion of the flask, while the pattern (8) is being removed.

From the frame extends a pendant hanger (9) having a bearing (10) at its lower end in which is arranged a vertically movable shaft (l1)- The bearing (10) is made of sufficient length to insure guidance of the shaft in true vertical directions, it being essential also that the shaft shall fit snugly in the bearing so that the former in its vertical movements will be prevented from shivering at any stage. At the top of the shaft .isrigidly fixed a spider (12) having lateral arms (13) and (14), and also a rearwardly extending arm (15). The rear end of the arm (15) is slotted and fits upon a vertical pendant guide (16) and is adapted to move vertically thereon, the purpose of the guide being to prevent the spider from having horizontal play. The arms (13), (14) and (15) are each slotted and support parting posts (17), (18) and (19) respectively, the posts extending through the slots and secured to the respective arms by means of nuts (20). The slots admit of adjustably arranging the position of the posts as may be required to suit the size of the flask used in making the mold. Upon each of the posts is adjustably fixed an engaging member (21) hereinafter referred to.

The frame (1) has lateral'arms (22) to which are adjustably fixed gage-members (23) and (24) respectively each of which are also slotted.

Upon the top of the frame are secured parallel bed-plates (25), the same being secured by means of bolts (26) that extend through slots (27 made in the frame.

A foot-lever (28) is pivoted at its rear end to alug (29) that is fixed upon the leg (2), and the forward end of the lever extends outwardly between the front legs (3) and (4) and is provided with a pedal (30). A. yoke (31) is fixed upon the lower end of the shaft (11) and extends laterally therefrom, and a cable (32) is connected therewith and leads therefrom upwardly from each end thereof. Pulleys (33) are arranged in connection with the frame (1) upon the under side thereof,and the cable leading from the ends of the yoke passes over the pulleys and has connection with an equalizing bar (34) that is pivotally connected in the forward portion of the foot-lever (28 is a pendant bar the cable passing underthe equalizing bar. The purpose of the equalizing bar is to ad mit of an equal application of lifting force to the opposite sides of the yoke through the medium of the cable when the foot-lever is depressed. a

Secured rigidly to the front of the frame that extends vertically adjacent the foot-lever (28), and has adjustably fixed thereon two stops (36) and (37; respectively that are adapted to be engaged by jaw (38) that extends diagonally upward from "the foot-lever. The connection of 'the 'foot lever with the lug (29) is sufficiently loose as to allow play that will admit of sligl't lateral movement of the lever so that by shifting the lever sid'ewi'se it maybe made. to pass with the vatin'g the parting "When the stop. (36) is the stops during its vertical movements, or may be made to "selectively engage the stops accordingly as manipulated. The weight of'the 'shaft'(11 together withthe spider fixed thereon and the parting posts carried by the latter is sufficient to lift the foot-lever by gravital force throughthe' medium of the cable, and therefore those parts tend to remain in their lowermost position while the foot-lever normally tends upwardly.

In operating them'achine, a molders flask "is'employed similar to'thos'e in ordinary use composed ofacop'e and drag (7), and also 'a bottom board (7"). The cope (7), however; is provided with oppositely disposed ears (39) that project respectively from "each end, a'n'd'also another ear (40) that projects from one side of the Gope. It is "also necessary to provide theipattern (8 with-extending arms (41) at its respective ends and also a third arm (42) from one side thereof. 1 These arms are "of sufficient chine and centered thereon by shifting the drag into contact with the guides (23) and (24). The foot-lever is then depressed so that its jaw engages the stop (36). This last operation will have 'the effect of eleposts (17) (18) and (19) so that theirtops will be in a plane slightly higher than the top of the drag properly adjusted. The upper portion of the mold is then formed by placin 'th'e cope over the drag with its cars (39% and (10) resting upon the corresponding tops of the parting posts .there raised'bythe posts to elevated placed"up'onthefdrag,

myself in mypresent'invention'to the exso as to be supported thereby. The cope is then filled with sand and is rammed in the usual manner. During the latter operation the drag rests upon "the bed-plate while the weight of the cope is borne by the posts,

being a slight space intervening between the two sections of the flask. In parting the mold the operator presses the foot lever gently downward and engages its jaw with the stop (37) with the result that the posts become elevated and carry with them "the cope. Also,the lugs (21') "on theposts are "so adjusted respectively thereon so as to "simultaneously enga arms (41) and (42) ofthe-pattern, correspondingly, ata stage in'the upward movement of theposts after the cope has been lifted clear of the pattern and as the upward movement of the posts continue the pattern is thereby raised from'the drag. In-

ge the extending asmuch as the cope is initially formed while supported firmly on the posts, th'esimult'aneous ri's'e ofthe'latter lifts the cope with absolute accuracy and thus breaking ofthe sand at the parting line of the mold is "obviated.

After the cope and pattern have been o'siti'ons,- the a set-on e 'ge upon the (6) that extend from the 1eg (2.)-. The pattern is then removed and 'the po'sts are returned to their lowermostposition; While thus positionedth'e "cope and-the drag are both conveniently'accessible for retouching or an other further hand operations that may be required. The impr'essi'ons that occur in the mold duetothe arms 1(41') aid (42') are stopped oh" by the ordinary -expedient of inserted cores, the cope is thenj r'ev and' themoldis disposed of in the. usual manner; Variations in patterns 'of course will require the use of flasks of correspondingly different-sizes,

former is lifted and and the patterns will necessarily have to be providedwith suitable extending arms and the flasks with corresponding notches and earst'o suitth'e peculiaritiesfof the pattern and to conform with the range of adjustments'of the various parts of themachine. The pattern "and "flask hereiniillustrated are given as anexample for theprep- 'aration of those parts-preparatory to their use with the machine, and 'Ido not confine ample shown.

What I claim is:

1. Inap aratus 'of 'the class described, a

supporting frame; a vertically "extending shaft 'mounted ."eentrally in connection with the frame and being vertically movable therein; a spider fiiied upon the shaft and havm'g a series of'slotted arms; aguide with which the spider engages; a series of parting posts vertically disposed and fixed respectively to the arm's'of' the spider {an en- '1 3( gaging member adjustably fixed on each post; and a mechanism for vertically shifting the shaft.

2. In apparatus of the class described, a frame adapted to support the drag of a molders flask; means movable in the frame and adapted to engage and support the cope of a molders flask; operating mechanism for elevating said means; and a stop for holding said mechanism at rest at a suitable 10 point to support the cope slightly above the drag While the cope is being rammed.

In testimony whereof I aflix my signature, in presence of two Witnesses.

WILLIAM C. WALDA. Witnesses:

MATILDA METTLER, SOPHIA HEINE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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