US1814416A - Molding apparatus - Google Patents

Description

July 14, 1931. T, S'TONEY 1,814,416

MOLDING APPARATUS Filed March 14, 1929 5 Sheets-Sheet 1 July 14,

1931. 'J, T s o 1,814,416

MOLDING APPARATUS Filed March 14. 1929 3 Sheets-Sheet 2 July 14, 1931., J, T TNEY 1,814,416

MOLDING APPARATUS Filed March 14. 1929 3 Sheets-Sheet 3 Patented July 14, 1931 UNITED STATES PATENT 'oFFICE JOHN T. STONEY, OE GLEVELAND. OHIO, ASSIGNOB RAYMOND E. S'I'ONEY, OI

' LAKEWOOD, OHIO I MOLDING APP'E'US Original application filed November 6, 1926, Serial It'd 148,870. Divided and this application flled larch 14:, 1929.' Serial No. 346,918.

This invention relates to a molding apparatus, and particularly such an apparatus as is adapte to compact material 1n a Slllil able container as, for-example, a flask con 5 taining a'pattern in which sand is placed for making a mold for casting purposes or a box in which sand is laced for the purpose of making a core. hese illustrations are iven for the purpose of a clearer in understan in; of the uses to which the apparatus may e applied and do not in any way limit the invention.

This application is a division of my coending application Serial No. 146,670, filed November 6, 1926.

An object of the invention is to provide a molding apparatus capable of compacting material 1n a suitable container to the desired degree of compactness in a relatively to short period of time.

Another object of the invention is to provide a molding apparatus which compacts the material in the container to the desired degree of compactness by vibrating and pressin such material.

Anot er ob'ect is to provide a molding apparatus capa le of ap lying the vibrating action upon the top 0 the material to be compacted.

so Another object is to provide a molding" apparatus capable of applying relatively high ressure upon the material being compacted and of sub'ecting such material to vibration either su sequently to the appliet cation of the pressure or simultaneously therewith.

Additional objects and advantages will become apparent hereinafter.

Without in any way limiting the inven- 40 tion which is herein disclosed I would saythat at the present time it is usual, in the making of molds for use in makin castings, to squeeze the same after it is p aced .in a flash and in association with a pattern and 46 also to jar the flask for the pur ose of compacting the same. I have foun that in the making of molds it is entirely possible to make a satisfactory mold by placing the same within a flask and in association with a 6 pattern, and subjecting the same within the flask to vibrating action imparted a ainst a plate or presser member inserted in t e open top end of the flask. In this connection the best results are obtained by simultaneously exerting the pressure upon the sand while it is being vibrated so that the sand within the mold is being simultaneously squeezed and vibrated. Such a method is successful when used in the making of molds which in the foundry industry are termed deep molds and has been successfully used in the making of molds for casting internal combustion engine blocks.

The jarrin method of compacting sand in flasks whic is at present well known and used in the art ap lies the jarring action to the underside of a table supporting the flask so that the jarring action may be described as being applied on the bottom of the flask.

In carryin out the present invention it is contemplate to provide an apparatus capable of subjecting the material to be compacted to blows upon the top portion thereof so exceedingly rapid in action that the effect of 75 one blow has not disappeared before a succeeding blow is affected with the result that the material being compacted isin a continual state of agitation during the entire compacting or vibrating period.

In the accompanying drawings disclosin several embodiments of the invention Figure 1 is an elevation of a molding apparatus with portions in section.

Fig. 2 is a section transversely through 216 lower part of the apparatus shown in ig. 3 is a sectional elevation of a portion of the apparatus shown in Fig. 1;

Fig. 4 is a top plan view of the lower portion of the apparatus shown in Fig. 1;

and

Fig. 5 is an elevation, with portions in 1 section, of a modified form of apparatus.

The a paratus comprises a base 1, which is provided at the rear thereof with an u standin post 2, the post being suitab y mounted in the base so as to be rotatable therein. At the u per end of the post 2, there is an outwar ly-extending support 3,

in which is suitably mounted a cylinder 4, having a piston 5, to which is secured a piston rod or stem 6. To the end of the stem 6, there is secured a casing 7, in which is located a freely movable vibrator piston 8. At the lower end of the casing there is a pin 9 which is mounted so that it may freely reciprocate. This in 9 impinges against the head 11 which terms in efiect a platen or presser head.

The head 11 is secured to the casing 7 by means of bolts 12 which are under tension of springs 13, so that the presser head 11 may be described as yieidably mounted upon the casin 7.

Extending outwardly, from the upper end of the casing 7, is an arm 14 towhich is secured a verticall extending arm 15 and this arm in turn shdesin a recess 16, which is formed in the support 3. The purpose of the rod 15 and the arm 1;; is to prevent rotation of the parts secured thereto, with respect to the support 3. i

It is believed to be unnecessary to go into detailed description, but it will be sufiicient to sit" that means is provided for introduc- 1H0 order to depress the presser head 11, -or conversely to introduce fluid pressure on the opposite side of the piston 5 in order to elevate the resscr head. F or the purpose of this invention any form of fluid pressure supply may be used;

The vibrator piston 8 is operated on the principle which is common to vibrators of supplying air to the casing which surrounds the piston and controlling the entrance port for the air and the exit port for the air by the reciprocation'of the iston. It is also preferred that this vibrator shall be what is known as a one-way vibrator, that is to say, reciprocation in a direction opposite from the .pin 9 is cushioned so that the vibration effect of the piston 8 is delivered only against the pin 9; such types being well-known in the art, it is believed unnecessary to enter into any detailed description of the air control for the vibrator.

The obvious operation of the vibrator is to impart, in very rapid succession, blows upon the pin 9 which in turn communicates the blows to the presser head. The rapidity of the blows imparted through the in 9 to the platen 11 is such that a vibration is set up in the metal of the presser head and the vibration is a continuing vibration due to the rapidity of the blows imparted thereto. This vibration is in turn impartedto the sand in the flask.

- By applying the vibration to a platen insorted n the upper open end of the flask and simultaneously applying a pressure it would seem that the combined action of sustained agitation of the particles of sand uid pressure behind the piston 5 in jarring and squeezing action.

There is a depending rod 18, which, at its lower end has a head 19 which is adapted to cooperate with an arm 20 having a recess 21 which is carried by the base 1 so that when the head is swung into operative position above the base the part 19 and the recess 21 may cooperate to hold the base and the swinging portion in proper position with respect to each other.

Since at times it is desirable to apply the vibrating action not only to the top of the sand in a fiaskbut also to the bottom ofthe flask as well, the vfollowing construction is provided in the apparatus.

Upon the base 1 there is a table 22 which is adapted tohave mounted thereon a attern andto receive a cope or drag ask in the operation of making a mold. This table 22 is supported upon a hollow casing 23 in which is located a vibrating piston 24-. The piston 24 in its reciprocation impinges against a pin 25, which in turn communicates its blows to the table 22. The table, upon the underside thereof. and adjacent the edge is provided with a downwardly extending flange 26, which cooperates with an upstanding flange 1a, which is carried by the base 1. Likewise the table 22 has on the underside thereof a latelike portion 22a, which engages with the plate-like portion 23a of the casing 23. The table 22 is held and secured in position b means of the spring retaining members 24 one of which is shown in Fig.

The purpose of this construction is to provide'what may be termed a free movement of the table 22 under the action of the vibrating mechanism. The spring connection permit-s a free vibrating movement of the table 22 at the same time retaining it from becoming disengaged from its mounting.

The vibrator 24 is preferably a one-way vibrator that is to say, the stroke is cushioned on the movement of the piston away from table 22. Therefore, the effective blows of the vibrator are upon the pin 25.

Within the base 1, there is a curved yokelike member 28 which at its ends carries two posts 29. These posts extend upwardly and are oppositel disposed with respect to each other and urther are located in line with the transverse center line of the table 22.

At their outer ends these posts 29 are provided with brackets 30 as will be clearly seen in Fig. 4, which brackets have means at their ends as indicated at 31 for engaging with a flask for the purpose'of raising the fiask from the table 22 after a mold has been for the member 28 is illustrated.

completed. ()bviously the means just described could as well operate a stripping plate if such were used in connection with the molding machine.

Referring to Fig. 2, the operating means This comprises an outer casing or cylinder 32 which is slidably mounted upon an inner cylinder The cylinder 32 has a bifurcated arm 34 which extends outwardly therefrom, this lolfurcated arm being shown'plainly in Fig. 4. The arms of the member 28 join at their central portion to what may be termed a sliding hub 85, which hub ismounted to be capable of moving up and down on a fixed post 36 which is secured within the base 1 of the molding machine.

The bifurcated member 34 has its arms passing beneath the arms of the member 28 so that when the cylinder 32 is raised it will result in raising the member 28, the post 29 and the brackets 30 .carried thereby, all for the purpose of drawing the mold fil'om its pattern or elevating a stripping p ate. I

As will be seen from the drawings, th operation of the cylinder 32is accomplished by delivering'fluid pressure into the chamber 37 formed'between the upper portion of the part 33 and the head of the outer reoiprocating member 32.

The molding machine which has just been described is one in which provision is made for vibrating the presser head and also for vibrating the table upon which the pattern and flask are mounted.

As stated in the first part of this specification, the presser platen with its vibrator, may alone be used in which event-"the vibrator associated with the lower table will be dispensed with. In such event any form oftab e may be used and provided with suitable means for elevating the flask to draw or for elevating the strippingplate where the same is use In operating such a machine as shown in Fig. 1, assume that a proper pattern has been attached to the table 22 and a flask filled with sand is properly mounted upon the table. Usually the presser head 11 is lowered by' operating the piston 5 and simultaneously with the squeezing operation the vibrator 8 is operated. Either simultaneously with the operation of the presser head and-"vibrator 8, or before or after such vibrating operation, the lower vibrator 24 may be operated.

In other words, as will be seen, any sequence of operation with respect to the overhead pressing and vibrating and the under or lower vibrating may be effected, as may be found convenient or desirable in connection with making molds from any as given pattern.

In Fig. 5 there is shown a molding 111, chine in which the table upon which the flask is mounted hasbeen omitted merely because any suitable form of support for the pattern and flash may be used, apparatus of this kind being thoroughly well known in the art.

This apparatus comprises a base member 40 in which is mounted for turning, an upright member 41. At its outer. end this member 41 is secured to the inside of a curved member 42 which curved member at its lower end has a flaring base 43v'withv a depending flange 44, which cooperates with the upper portion of the base 40. It will therefore appear that the upper structure 42 is so mounted that it may turn or swivel upon its base mounting.

For the purpose of holding the upper portion in any fixed relation with respect to the base 40, the spring-pressed latch pin 45 is provided, which is adapted. to engage with an opening 46 formed in the stationary base, thereby locking the swinging head in its proper position. v At the outer end of the member 42 is a cylinder 45a having a piston 46a therein to which is'secured a piston rod 47. This piston rod at its lower end carries a casing 48 in which is secured a vibrator piston 49 and at thelower end of the casing 48 there is mounted a presser member -.50 which is spring held with respect to the casing 48 by the springs 51.

The construction of'the cylinder, the piston, the piston rod, the vibrator piston 49,

the presser 50 and the parts associatedtheredesired, provided with means for raising the flask, or to raise a stripping plate as shown and described in connection with the apparatus at the lower part of Fig. 1 of the drawings. It will be obvious that the construction of apparatus which has been herein described may be varied withoutdeparting from the spirit of the invention and such modifications are intended to be included herein.

It has been found that when using the apparatus in actual practice in the forming and making of molds, that it requires only two or three seconds of combined vibrating and squeezing to produce a perfectly'satisfactory mold even in a comparatively deep flask which period of time will-be seen to be materially less than that required in the described-apparatus results in greater pro duction, while the number of workmen emplo ed will not be greater than the number 0 workmen usually employed in the making of molds. There is therefore a marked saving in cost of production in the making of castings by using the apparatus herein disclosed.

It should be understood that the invention is susceptible of such modifications. and

adaptations as fall vithin the scope of the appended claims.

Having thus described my invention I claim:

1. Molding apparatus comprising a table, a movable presser member mounted' above said table, means' for raising and lowering the said presser member, and vibrating mechanism centrally arranged with respect to said presser member whereby the vibrating mechanism imparts blows to the said presser member.

2. -Molding apparatus comprising a table adapted to receive a flask, a presser member located above said table and movable toward and away from the same, a one-way vibrating mechanismicarried b said presser memher for imparting rapid lows tothe presser member. r

3. Molding apparatus comprising a table,

a presser member above said table, means upon which said presser member is mounted,

resilient members forming a part of the con-" nection between said presser member and its mounting; and a vibrating mechanism car- 'ried by the mounting for the presser member anddelivering-rapid blows directly to said resser member.

4. olding apparatus com rising a table, a presser member mounted above said table, means upon which the said presser member is mounted, resilient members forming a part of the connection between said presser member and said means upon which it is mounted, means for raising and lowering the pressermember and its mounting, and vibrating mechanism associated with the presser member and imparting vibratory blows directly to the presser member.

5. Molding apparatus comprising a table, a one-way vibrating mechanism mounted beneath the table and adapted to impart 7. Molding apparatus comprising a table adapted to receive a flash, a vlbrating mechanism mounted beneath said table and imparting blows centrally therto and in an upward direction, a presser member mounted above the table and movable toward and awayfrom the same, and vibrating mechanism associated with the presser member.

8. Molding apparatus comprising a table adapted to receive a flask, a vibrating mechanism mounted beneath said table and imparting blows centrally thereto and in an upward direction, a presser member mounted above the table and movable toward and away from the same, and vibrating mechanism associated with the presser member and imparting blows centrally thereto and in a downward direction.

In testimony whereof, I hereunto aflix my signature.

JOHN T. STONEY.

- blows directly to the table, a presser member mounted above the table and movable to- 'ward and away from the same, and a oneway vibratmg mechanism associatedwith said presser member and adapted to impart blows to the said presser member.

6. Molding apparatus comprising a table adapted to recelve a flash, a presser member located above said table and movable toward and away from the same, and a vibrating mechanism carried by the presser member and directly delivering blows theretoin a 1 direction toward the table.

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