US1506876A - Molding machine - Google Patents

Description

J. R. wooD MOLDING MACHINE Sept. 2. 1924.

Filed July 26; 9 5 Sheets-Sheet l Eivwentoz M fifl. Emma Sept. 2. 1924. 1,506,876

J. R. WOOD MOLDI NG MACHINE Filed July 26, 1922 3 Sheets-Sheet 2 J. R. WOOD MOLDING momma Sept. 2 1924.

3 Sheets-Sheet. 3

Filed July P6,

& anuentoz Patented Sept. 2, 1924.

UNITED STATES JOHN R. WOOD, OF NEWARK,

NEW JERSEY, ASSIGNOR TO NEW PROCESS MULTI- OASTINGS COMPANY, OF NEWARK, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

MOLDING MACHINE.

Application filed July 26, 1922. Serial No. 577,666.

To all whom it may concern:

Be it known that I, JOHN R. Woon, a citizen of the United States of America, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Molding Machines, of which the following is a full, clear, and exact description.

This invention pertains to the art of molding and is an improvement in the machines now used in foundry practice for forming the sand molds for casting any and all kinds of objects in metal. In this art, as heretofore practised, it has been usual to employ for the making of the sand molds what is known as a power or jolt machine, which is an apparatus containing a member similar or analogous in its action to a reciprocating piston or plunger which operated by steam or compressed air imparts a rapid succession of jolts to a support on which a flask containing a pattern is placed and into which sand of proper character and in proper condition is deposited, with the result that the jolting-of the said support compacts the sand around the pattern and thus dispenses with the ramming by which such molds have commonly been made for many years.

In the use of such machines the usual practice is to place the drag member of a flask on the jolt table, and pack the sand therein. This is then removed and inverted and a cope member placed in its stead,. packed in the same way, then removed, and

associated with the inverted drag, after both the patterns or matched parts have been withdrawn. To produce acomplete mold, therefore, requires either the simultaneous use of two jolt machines,- or twice the length of time required for making one part or half of the mold. The primary object of this invention is to avoid this 01)- jection and to make a single machine capable of forming both the cope and drag members of the mold simultaneousl' under such conditions that they maybe immediately associated to form a complete mold, without the use of any flask whatspever.

Toproperly carry out this invention any machines of the type or kind known as power or jolt machines may be employed, but. to form and use the sand molds produced, certain accessory parts and appliances are necessary if good molds are to be 5 produced and the usual flasks. for such molds dispensed with., These comprise means for retaining'the sand in the cope when lifted from the table, means for withdrawing the patterns or match parts, and means for raising, inverting and shifting the drag half of the mold. A specific de scription of such parts follows.

The improved machine and its accessory parts are illustrated in the accompenyingflii drawings, in which Fig. 1 is a general view partly in elevation and partly in section, of the complete 'machine. Fig. 2 is a similar view at right angles 7 to that shown in the first figure. Fig. 3 is'a sectional view of the cope showing the means employedfor withdrawing the pattern. Fig. 4 is a sectional view of an associated cope and drag mounted on a carriage.

Fig. 5 is a view partly in elevation and partly in section of an associated cope and drag showing sand retaining means for the co e.

ig. 6. is a view in side elevation of the same, and

Fig. 7 is a from below.

The machine is mounted on a suitable base 1, and comprises, in the main, a cylinder 2 with a plunger 3, which by means of steam or compressed air introduced at 4 and reciprocatingthe piston, imparts plan view of Fig. 5 looking rapid jolting movement to a support 5, hav

ing a flat table 6. Machines of this general character are well known in the art, and that shown is intended merely as a typical illustration of a jolt machine, 7

On the tablefi, a follow-board 7 to which' is: clamped a drag 8 containing one part of the pattern or a matched part 9, is socured in any proper manna and alongside of this on and secured to the same table is a raised supporting table having legs N. This table 10 is formed in part of a central section 12, carried by a vertically moi-able support 13, comprisin a cam 14 and h mdle 15 by means of w ich the said section may be raised to a level flush with the top of the table or lowered a given distance below it.

U on this table 10 is placed a cope 16,

the ower edge of which has holes to fit down over dowel pins 17 in the jolt table, so as to facilitate the adjustment of the cope. A matched plate or pattern 18 is laid on and secured to the section 12.

The cope and drug, as indicated in Fig. 2 and other figures, may be capable of containing two or more patterns or matched plates, their size and capfzlipitydn th1 s regard being arbitrary; en in position, sand of proper character and in proper condition is deposited in said cope and drag, from above, and by the operation of the jolt plunger is firmly compacted around and over the patterns.

\Vhen these parts have been packed in this way and leveled oil, a cover 19 is clamped on the drag and steam or 'com pressed air is admitted to two cylinders 20, or other means employed, to raise the follow board and the drag by means of pistons and trunnions 22, extending from side plates carried by the said follow board. The trunnions carry segmental gears 23 and rack bars 21 extend up from the table or cylinders 20, with which these gears mesh as the drag rises, and operate to turn the follow board and drag completely over, or into the position shown in dotted lines in l 11 place of the lifted drag,'a car 24, Figs. 1 and 4, is then run in and the dra lowered and removed from the follow boar i lgced thereon, and the pattern removed.

e clamps 25 securing the cover 19 to the drag are then removed and the car drawn oil to one side. The section 12 of the table 10is then lowered with the pattern thereon as shown in Fig. 3, and the cope 16 by chains connected to trunnions 26 is then lifted from the table and carried .to the drag with which it is assmiiaterl in the relation shown in Fig. 4.

To permitthe cope to be lifted oil" and transferred to the drag, it is necessary to employ a sand retaining means attached to the co and the means devised for this urpose,- 18 shown in detail in Figs. 4 to 7.

cope or section 16"of the flask is composed of the stationary or main part 16 and'low'e; movable edges 27, which are connected to the main part by headed flanges 28 which slide in grooves in the some. At each end of the part 16 are guides 29, in which side bars or plates 30. To pins 31 gagin pivoted to the side of the cope and to the bars are used for raising and lowering said bars.

When the cope has been placed on the drag the levers 36 are forced down with the result that the rods 34 spread apart the A pins 35 and thus withdraw the sand retaining edges of the movable parts 27 from under the packed sand in the cope. The movable parts 27 have diagonal ton es 87 engaging slots in the end parts or s idea 28 and when the first named parts are drawn out they shift also the end parts.

While this operation is being the cope and drag members are ocked torforlned gether by clamps 38 but after the sand remining slides are withdrawn these clam s are re eased, and first the cope and then 1; drug flask members are lifted 08 from the sand leaving simply a mold of sand without a' flask of any kind. When this mold is poured, it is enclosed in a. relatively light metal casing or box which is removable ut which serves all the urposea of an ordinary flask. After the mold is poured this casing is taken off and applied to another mold. This is a well known device in the art. It will be observed that the cope and elllemezfms are so fog-meld that when asmcm' t ey orm agra ua y tapering casing or flask around the sand mold'ao that they may be readily removed therefrom.

The above described improvements are defined in the following claims:

1. In a power or jolt molding the combination with a single supportor table and means for jolting the same, of I vertically movable drag support mounted thereon and means for inverting the some and a drag carried thereby when raised, a.

central vertically movable section for supporting the pattern, means for lowering and section to remove the pattern and means for removing and assembling the cope and the inverted drag when packed.

3. In a power or joltmolding machine the combination with 'a single jolt. table of a vertically movable drag support mounted having a central vertically movable gection thereon carrying segmental gears, fixed rack for supporting the pattern and withdrawing bars a pted to engage with said rs the same when lowered. when the said support is raised and tot ere- In testimony whereof I hereto afiix my 5 by invert;] the 233m? 131d :1 statioimry cots; signature.

su ortaon iete my, sup moun qa Fhe table f or the put gose gt forth and JOHN WOOD-

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