US1061440A - Mold-making machine. - Google Patents

Description

H. R. ATWATER. MOLD MAKING MACHINE. APPLIGATxoN FILED 001219, 1910.

Patented May 13, 1913.

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H. R. ATWATER. MOLD MAKlNG MAGHINE. APPLICATION FILED 00119, 1910.

Patend May 13, 1913.

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HARRY R. ATWATER, 0F CLEVELAND, OHIO, ASSIGNGR TO THE OSIBGRN` MANUFC- TUBING COMPANY, 0F CLEVELAND, OHIO, A CORPORATIG? OHIO.

:MOLD-MAKING MACHINE.

Specification of Letters Patent.

Patented )lay 13, 1913,

Application filed October 19, ll. Serial No. 587,615.

To allv whom it may vow/'m i 2 is a plan view of the same; while Fig. 3

Be it known that I, HARRY A'ruwrizn, 2 is a side elevational view of another design a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Mold-Making Machines, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principleso as to distinguish it from other inventions.V

The type of mold-making machine, to which the present invention relates, is known as the rock over wherein an oscillatory carrier for the pattern plate is provided, so that the mold may be lled in one position of said carrier, and then turned t over 1n reverse position upon a suitable parting stand. Such stand, in the preferred form of construction illustrated, is vertically reciprocable, so as to draw the mold away from the pattern, although it may be arranged to raise the pattern-carrier and pattern, instead. ln the type of machine referred to, furthermore, it is customary to employ resilient means, generally in the form of tension springs connected to the oscillatory pattern carrier, whereby the movement of the latter may be facilitated, it being understood that a considerable weight is attached thereto when, the mold is filled.

The object of the provient invention is the revision of-a mold-making maehine of -the ind described',- v'vherein resilient means;v of greater tension may be employed, thus correspondingly lightening the operators task, as also to ,provide means for preserving the carrier and attached pattern plate in exact horizontal ai'ihement during the drawing of the mold, or other words, the parting of such mold frointhe pattern.

Tothe accomplishment of these and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

` The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constiti'f'ing, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings :--Fig ure 1 is a side elevation of a, mold-'making machine l have incorporated the present invention in slightly modilied form; Fig. 4 is a horizontal section on the line 4-4 in Fig. 1; and Fig. is avertical section on the line 5-5 in Fig., 2.

The machine to which my present improvements are shown as applied in Figs. 1 and 2, is in general the same as that shown in U. S. Patent No. 937,036 issued to me under date Get. 19, 19(19. In such machine the frame l which is preferably mounted on low wheels or rollers 2 to permit of its movement about, includesl the mold filling and parting stands 3 and 4. above referred to between which, upon two laterally spaced standards 5 that are integral, or rigid, with the frame-work of the machine, is oscillatorily mounted the carrier, or atternlate holder 6. This pattern-plate liolder, owever, is not directly pivotall attached to the shaft 7 in such standards, w ich forms, more exactlyspeaking, the support therefor, but is rather adjustably secured in a secondary frame. 8 that is thus supported on the shaft and formed with guide-ways 9 so disposed as to lie vertically when said frame is positioned in contact with a stop 10 rovided to limit its movement toward t e parting stand. The pattern-plate holder, then, is mounted upon said guide-ways so as to be in edeet vertically adjustable with respect to said parting stand in such position of the frame, set screws 11 or like means being provided in conjunction with the gui-1c:- ivays to secure said plate holderv in any such vertical posit as may be desired.

The filling stand 3, upon which the mold is designed to 'rest pending the filling and stamping of the sand therein, comprises a pair of plungers each with a small rest or head 12 on its upper end, such plungers being adjustably secured in suitable splitA collars 13 or the like that form a part of the frame. The parting stand 4 on the other hand, comprises a plunger adapted t0 be vertically reciprocated by means of a rockshaft 14 bearing a cam 15, such'plunger being provided with a platform-like head 16 upon which laterally spaced, depressible members 17 are arranged so as to be depressed by the mold bottom during the placing of the mold in position preparatory to freeing the same from the pattern embedded in the top of the material with which the flask of the mold is rammed. Such members 1T are thereupon secured against further depression, as by clamps 18, so as to support, in other words, the mold in exactly the position itis left when the pattern-plate carrier is turned over.

Springs 1S) preferably four in number, connected at one end to a bar 20 transversely disposed of the filling stand and at the other end to a bar Q1 similarly' transversely secured in the secondary frame 8, tend to maintain the pattern plate holder in a more or less vertical position; in ,other words, they relieve, or counterbalance, the weight of the mold in both of the horizontal positions of the holder or carriage. In order that such springs may be of proper assistance in thus swinging the carrier after the mold has been filled, they will obviously require to be considerably stronger than to counterbalance the unloaded carrier. This. however' entails considerable annoyance in the filling operation, for the reason that the carrier tends to rise therefrom, while similarly in the parting operation, the carrier will tend to fly up, the moment it is relieved from theweight of the attached mold, thus endangering the impression of the pattern, as Will be obvious. It has also been found that while the mold is still attached to the carrier in the parting position, :the strain upon the pattern-earner support, owing to the/leverage of the carrier is very considerable, sutficient in fact to distort the carrier and machine frame more or less` especially in machines designed for handling heavy work; so that the outer portion of the carrier may lie a trifle belenr the horizontal plane in which it should be maintained. Thus, despite the construction of the parting stand whereby a very exact leveling of the mold would ordinarily be obtained, difficulty may nevertheless arise from this distortion of the carrier frame.

It is in order to overcome the several dif-A ficulties just referred. to that the present improvements have been designed, such improvements consisting in the first place, in the provision of latch means for retaining the pattern plate carrier in position upon the filling stand against the excessive tension of the springs 19.

In the preferred construction illustrated, two catches 22, 22 respectively mounted on the ends of` an oscillatory shaft 23 on the plungers constituting the filling stand Il, are provided, such catches being adapted to engage with suitable lugs 24 on the corresponding sides of the pattern plate holder. Springs 25, connected with said catches, serve normally to effect their engagement upon the simple depression of the holder into its filling position, while an extension this member is provided with a notch 29 adapted to engage with a transverse pin 30, or equivalent element on the pattern plate holder; as also with a hook-like clam 31, that is adapted thereupon to be drawn own over such pin 30, thus securing the frame against either downward or upward movement. The location of pin 30, as also of the pivot pin 32, attaching the member 27 to the frame extension 28, may be varied to correspond with different sized flasks; a series of holes being provided to receivethe pin in cach case; while the length 0f the member 27 is likewise'adapted to be adjusted to correspond witlr'ttie adjusted height of the pattern-plate holder by being made of two sections, oneA damped or threaded Within the other aswill be readily understood. The object, ofcourse, is to maintain such holder in a erfectly horizontal position despite the weight of the attached mold the parting stand being then adjustable, by virtue of its construction, to the bottom of the mold as ii.- is supported from the horizontally disposed holder. Upon detaching the mold from the holder, the latter is held against movement under the tension of the springs 19, until the operator has time to lower the mold safelyaway from the pattern; then at his leisure he releases pin r'30 from the clam 31, and restores the pattern-plate hol er to its filling position, where it is secured by catches 22. It will be understood that this last described device need not of necessity combine both of the functions which it is thus seen to fulfil in other words, in the case of a machine designed for light work it may not be found necessary to sustain the pattern carrier,

and the member 27 may be simply used,

muchas the catch on the parting stand side, to prevent said carrier from movement until the operator is ready. So, conversely, in machines of the type illustrated in my c0- pending application filed July 28, 1909, Serial No. 509,989, where power means are provided for oscillating the pattern carrier (such power means operating through the springs so that the latter are not under tension until it is started to oscillate the carrier), it may not be necessary to use the retaining feature but merely the strut feature of such member. It is particularly in the handling of heavier molds for which this power machine is especially designed that distortion of the carrier and machine trame is apt to occur. Such power machine is illustrated in Fig. 3 of the drawings where the parting stand 4, filling stand 3, and pattern plate carrier' are identitied with the same reference characters as in the preceding description. The power means in this case consists specifically of a cylinder 33, the piston rod 34 in which is adapted to oscillate a rock shaft 35 to put under tension suitable springs 36, and thereby pull over the pattern-plate holder,i or carrier frame 6. iVith the exception of those noted, however, the other eneral features of the machine are not o present interest, and hence need not be described. Attention is called, however, to the use here, instead of a member Q7 having both supporting and retaining means, of a simple detachable strut 37, which is adapted to be inserted in posi tion to engage with the carrier frame in its parting position and support the same so as to prev'ent distortion thereof by reason ot the heavjyr Weight attached to it. Since the tension of the springs 36 is relieved after the turning over of the carrier, by suitable operation of rock-shaft 35, there is no disposition present on the part of such frame to swing back prematurely. Another fea ture to which attention is desired in connection with this power machine is the use of a worm 38 and worm gear 39 for raising and lowering the parting stand, in place of the cam 15 utilized for the purpose in the previously described form of machine. The operative connections of such gear l'learly appear in Fig. 3, as also the shaft 40 that carries the worm, such shaft inclinin at an angle so as to bring the hand whee 41 on its upper end into a position conveniently adjacent to the operators station.

Other modes of applying the rinciple of my invention may oe employed) instead lof the one explained, change being maria as regards the mechanism herein dlsclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention f 1. In a machine of the character described, the combination of a stand; an oscillatorily supported pattern carrier adapt ed in one position to rest u'pon said stand,

said carrier being adapted to receive the fiask to be filled; springs connected with said carrier and adapted to raise the same with a fiask when unfilled but not when filled; an automatically operative catch mounted on said stand and adapted to secure said carrier in position thereon against the action of said springs; resilient means renderi said catch thus operative; and a tread]y or releasing said catch.

2. a vmachine of the character described, the combination of a filling stand and a partiti stand; a carrier for the pattern and das oscillatorily supported on a transverse axis between said stands and adapted in one position to rest upon said filling stand and in another position to extend horizontally over said parting stand with such flask resting thereon; resilient means connected with said carrier and adapted to raise the same with a iask when unfilled but not when filled; a strut adapt ed to engage the outer, or` free, end of said carrier and support the same in its horizontal position over the parting stand; and retaining means adapted to dctacha'oly secure said carrier in such other position upon said filling stand against the action of said resilient means.

3. In a machine of the character described, the combination of a filling stand and a parting stand, the latter being vertically reciprocable to withdraw the mold from the pattern; a member oscillatorily sup` ported on a transverse axis between said stands; a pattern carrier adjustably secured t0 said member and adanted in one ysition 'to rest upon said tillin stand an in another position to extend horizontally over said parting stand; means tending to raise said carrier from such positions; and catches respectively adapted to detachablxi,v secure said carrier in each of said ositlons, the catch associated with the parting stand being vertically adjustable to correspond with the adjusted position of said carrier on said member.

4. In a machine of the character den scribed, the combination of a filling stand and a parting stand, the latter being vertically reciprocable t0 withdraw the mold from the pattern; a member oscillatorily supported on a transverse axis between said stands; a carrier for the pattern and flask lidjustably secured to said member and adapted 1n one position to rest upon said filling stand and in another position to extend horizontally over said parting stand with such fiask resting thereon; resilient means connected with said carrier tendin to raise the same with a flask when unfille but not when filled; and catches res ectively adapted to detachably secure sai carrier in each of said positions, the catch associated with the parting stand being vertically adjustable to correspond with the adjusted position of said carrier on said member.

5. In a machine of the character described, the combination of a filling stand and a parting stand, the latter being vertically reciprocable to withdraw the mold from 'the pattern; a member oscillatorily supported on a ltransverse axis between said stands; a pattern carrier ad'ustably secured to said member and adapte in one osition tojcst upon said stand an in another position to extend horizontally over said parting stand; and an adjustable strut adapted to engage said carrier and support the same in such last-named position.

6. In a machine of the .character described, the combination of a filling stand and a parting stand, the latter being vertically reciprocable to Withdraw the mold from the pattern; a carrier for the pattern oscillatorily supported on a transverse axis between said stands, and adapted in one osition to rest upon said filling stand and 1n another position to extend horizontally over said parting stand; and `astrut adapted to engage th free end of said carrier and support the same in such last-named position, said strut being adjustable transversely of the axis of osclllation of said carrier so as to be adapted to thus en age the free end of the same at different istances from suchr axis. Y

Signed by me this 12th day of October, 1910.

HARRY R. ATWATER.

Attesd by- ANNA L. GILL, JN0. F. OBERLIN.

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