US1597322A - Molding machine - Google Patents

Description

Aug. 24, 1926. 1,597,322

F. E. MCCABE MO'LDING MACHINE Filed June 30, 1924 3 Sheets-Sheet wmy MQW f Emmmmm a H IIUND us- "24, 1926. I

F. Ef. MccA'BE 'HOLDING MACHINE Filed Jue so, 1924 3 Shets-Sheet 2 4 Aug. 24 1926.

A1,597,322 F. E. MCCABE MOLDI NG MACHINE Filed June 30, 1924 3 Sheets-Sheet 3 .17a fz Jz fit lill ff 60 i| [frye/#0f Patented ug. 24, 1926.

Unirse STATI-:s

Pattini OFFICE,

FRANK E. MCCABE, OF CHAGRIN FALLS,` OHIO, ASSIGNOR TO THE GRABLER MANU# FACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

MOLDING MACHINE.

` Application led .Tune 3Q, 1924. `Serial No. 723,197.

and between which heads a pattern, that is carried by the ramming head, and a superposed sand-filled flask are adapted to be compressed, my improved means serving,` as the ramming head returns to normal posi-` tion, to arrest the movement of the flask thereby to cause the pattern to be withdrawn from the mold, and thereafter to sustain the flask until the flask ismanually or otherwise removed. t

The primary obJect of my invention is to provide, in a machine oftheaforesaid char` acter, means for larresting the movement of the flask during the return movement of the ramming head so that the pattern will be withdrawn from the mold and for sustain` ing the flask in such a position that it may be' readily removed from the machine, the said means automatically withdrawing from flask arresting position when the flask is removed so that another llask may be ap-l plied to the pattern, and likewise resuming flask arresting position during the subsequent ramming operation. i

tively simple and inexpensive means of the aforesaid nature which is thoroughly reliable, is not likely to get out of order, is con` venient of embodiment in a molding machine of the character above referred `to and is supported by a stationary part of the nia-,t

chine, thus relieving the moving parts 0f undue weight. Y

rThe foregoingobjects, with others which will hereinafter appear, are attained in the structure defined by the claims annexed hereto and describedin detail in the following specification, reference being had to the accompanying` drawings wherein Fig. `1 is a sectional front elevation of av molding machine incorporating my improved flaskiarresting and sustaining means; Fig. 2 isa fragmentary rear elevation ofthe machine;

Fig. 3 is a sectional plan on the line 3-3 of Fig. l; and Fig. 4 is a transverse section on the line l-et of Fig. 1.

The molding machine wherein I have shown my invention incorporated comprises, generally, a base 1 involving an upwardly opening cylinder 2 containing a piston 3 on which is mounted a ramming head a, said head being secured by suitable means to the `top flange 6 of the piston. The piston is heldV against turning with respect to the base by plungers 8 that are secured at their upper ends tothe flange 6 and operate within dash pots 9 that are sustained by the base,

the dash pots serving to control the descent of the ramming head and parts carried thereby.`

Secured to the ends of base l are columns 10 and 11 the former terminating at its upper end in a cylindrical post 12 on which is journaled a sleeve13 of a swinging pressure head 15, a nut 16 being applied to the threaded upper end of the post 12. The free end ofthe swinging head is formed with a yoke 1S which is arranged to straddle the cylindrical upper end 19 of the column 1l,

a suitable abutment 20 being applied to the top of the column" 11 and held in place by a nut 21 thereby to resist upward movement of the head.

Suitably "attached to theramming head l and the swinging head 15 are the respective i pattern frames 25 and 26 which carry pat- Further objects are to provide compara-y terns 25Et and 26a.

A mold flask 28 is` adapted to be placed upon thepattern frame 25 and to insure the flask being properly positioned with respect to the pattern 25a. the flask and pattern frame are provided with cooperating posi tioning parts. In the present embodiment these parts consist of guide pins 30 which rise from the ends of the pattern frame 25 and enter apertures in ears 31 which extend f fllfeurnaled within suitable,` bracelets and compressing operations.V As will presently appear from the description or' the machines operation, the sand frame is projected 'over the top pattern frame, and is adapted to 'be sustained in this position during the descent 'of the flask by holding mea-ns A35. L

To insure the 'proper :alignmento the molding equipment carried by the respective heads 4C Vand 15, the former or animing head 4 is provided with pilot pins 40, and the latter or swinginghead '15 with 'guides 41 which contain sockets into which the pilotpins alc'ctirately lit. y

-Pressure flu-id 'is supplied from a pipe lline lle, through a three-way valve and Vpipe lldf'to athe "cylinder `2 for .elex'fating 'the piston'and the 'ral'mning' head fl, withfthe 'carried thereby. VIn one position the vfalve siipplies "pressure fluid to Ythe Y'c'ylinder while in VAa-,jse'cn'd 'position it permits 'the titi-id Vfrom the 'cylinder to "escape through a @pipe y fnv thfatare fl'e d" with ,respect to the base "V1 and Y aiieSliwn as'caririe'd bythe'eolunins 10 cro 'pairs lswing'inwardly andoutwar iv 11, are short shafts 52 whichcarry arms tliat-constlttit'e Y my Aimproved :flask "arresting,` andsustainingmeans lt, Vwill be 'observ d from rigs. je and that there new@ sii-afa 52, with *their 'resp'ective arms, Yarranged --adjacent e-ac'hend'or'the machine andthe uppe'rfends oithe'opposed pairs of ary-rms are adapted -to" swing' inwardly beneathV the flask 28. The armsje'i-ea'eh pair arefasten-ed rig'- togethertlirough a yoke '56 sothat said arms'ae caused Ito movecasy one; andthe tivopair's .of arms, which are located adjaeent'the oppositeends 'et theila'slr, are operatively ,connectedtegether,` s thatltheI two i' i Y l" at the same'tinie,.by`means of a. link 5`8that is located onthe're'ar side or' the ymachine and has one of its ends connectedtoo-ne oi the arms 53 above itsshallt 52 while its! other 'Vend is connected to an arm'() which de-Y pends from the rear shai't52 of lthe otherpair of'ai'fzms the latter gpair being;` 'located onthat'end of thev machine :toward .the column'lO. Incidentally, `shoes G1 of hardened metall maybefsecured, 4asfby `screws 62, to Ythe tlaslr engaging ends'of -the arms Pvotally mounted upon `a stud `which extends rearwardly from the column 410 is a lever 66 .that has a laterally-extended arm A67 along,- which a weight'GS is adaptedto be adjusted and secu-red "in anyo."position thereonby a setsciew 69. The weight tends to swingt-he lever 66 in "a Adirectionto ad- Vance its -lower endftoward the vpreviously mentioned arintO, but-this is resisted by an abutment 70 in the nature of a pin that tends rearwardly fronr the lower end of the sleeve lfof the-swinging head 15. v

Arod 7 5 has'its inner end pvtally connected to the lower extremity of the arm and its outer end plays freely through a hole in the lower end of the lever 66. The rod 75 tis threaded inwardlyl'a "suitable distance from its outer end Vand has a nut 76 applied thereto between which and a collar 77 is *com'ined a-coi1l spring 78 which sur; rounds 'the-rod, -the collar being ar-ranged to engage the adjacent side of the lever 66. Spaeed lrom the opposite side of the lever is a nut 79 that is threaded to the rod. The rod is slidab'lethrough a guide 80 that extends rearwardly from an adjacent portion oi the machine, and fan adjustable `stop lfor the redis .provided by lock nuts'l wh engage 'the V`g'gtlideV 8O to limit 'the eut'wa'rd movement or the lrod. stop will 4pi'fesently` appear. Y i

`Suitable latch mechanism, designated 85, serves to vhold v'the reeend'eff the 'swinging head 1'5 "to the upper I'end of the column 11.

'jln considering the operation' of vvthe mechanism, lit willbe 'assumed thatthe ypressure head has been Ireleased trein the column 11 and lswurigrearwardly out'o'f theway Th'eoperat-or after vcleaning the `pattern 25a byfmeans 'of compressed fair in accordance the patternl frame with the perforated ears l31'ofthe'flaskenga-ged over the gai-de pi'rrsflSO. IHe"then-app'lies the sand'frame 32 to ithef'upp'ei end of the flask andfi'lls the flask vand sand iramelwith sand, scraping the surplus. sanc'l fr omthetop ofi the sand 'frame so that :the Asand is 1y-iush with the stop edge offthe'franie.

n may be explained at this lpent @am when thepressure head 15 isswung to inoperative position, the 'abutment 70 moves awal AVfrom'normal -.position and allows "the web'litBS to swing* he lever 6G inladirection to eiigage its lower end withthe nut 79 on the rod 75 therebylto'thrust said fred inwardly 'an d :swing the llo'wer'end oil: the iarlln 60, "to `whic`h Vsaid -Vrod -isj connected, in la cer` responding direction. As a resultf ith-is, andby reasonottheconnections above de` scri'bedin detail, 't'h'e upper lends 'of the llasli sustaining' arms 53 aTre thrown outwardly bevond {iaslr engaging position.

Returning' new to "the operation of Athe The ypurpose of this machine, after the operator has fll'led the tion in which the supply pipe 44 is thrown into communication with the pipe 46 and pressure fluid is accordingly conducted to the cylinder 2 to elevate the piston 3 part-s carried thereby. As the ramming head 4 rises, the pilot pins 40 enter the sockets of the guides 4l and properly align the cooperating mold parts that are carried by the heads, and as the ramming head completes its upward stroke the sand frame 32 is projected upwardly over the pattern frame 26 and is caught by the holding means 35, the sand being compacted until it now occupies only the flask, with mold cavities depressed in its upper and lower surfaces. As the ramming head ascended and the flask 28 withdrew from between the opposed pairs of arms 53, said arms were swung inwardly by the spring 7S to flask engaging position. It will be clear from an inspection of Fig. 2 that the arms are stopped in flask engaging position by the engagement of the nuts 8l with the guide 80.

The operator next throws the valve 45 to the position wherein the cylinder 2 is eX-` hausted through the pipes 46 and 47, and the pistonV 3 with the parts carried thereby descends, the descent being cont-rolled by the dash pots 9. In the descent of the parts, the flask is deposited upon the upper ends of the arms 53 while the ramming head with the pattern 25a carried thereby settles to normal position thus withdrawing the pattern from the mold. The flask, free of all connections save as it rests by its own weight upon the arms 53, may be easily lifted from the machine.

In the starting of another operation, the pressure head is unlatched from the column ill and swung rearwardly, and as this is done the arms 53 are automatically retracted from flask engaging' position through the above described mechanism. Vhen another flask is placed upon the pattern a, the operator removes the sand frameV from the holding means 35 and applies it to the flask and continues as before.

From the foregoing it will be seen that my invention provides very simple yet thor oughly reliable means for arresting and sustaining the flask after the molding operation and which is automatically moved out of the way before another flask is placed in the machine. Furthermore, this means is supported solely by a stationary part of the machine and the moving parts may thus be made lighter than in the case of machines wherein the stripping mechanism is carried by the ramming head.

Having thus desc 'ibed my invention, what I claim is l. In a molding machine, the combination of a base, a ramming head supported thereby for vertical movement, a pressure head movable from an operative position over the and the i ramming head to a second position laterally of the: former position, a pattern carried by the ramming head, aflask adapted to be applied to the pattern, opposed flask sustaining arms pivoted to the base, means tending to swing said arms inwardly into the path of vthe flask, and operative connections through which said arms are swung outwardly by the pressure head when the latter is swung to the aforesaid second position,

2. In a. molding machine, the combination of a base, a ramming head supported thereby for vertical movement, a pressure head movable from an operative position over the ramming head to a second position laterally of the former position, a pattern carried by the ramming head, a flask adapted to be applied to the pattern, opposed flask sustaining arms pivoted. to the base and adapted to swing into and out of the path of the flask, member tending to shift said arms out of the path of movement of the flask, and yielding connections between said meme ber and the arms, the pressure head and aforesaid member having parts cooperating to move said member to a position in which the flasksustaining arms are moved toward the path of movement of the flask when the pressure head is in operative position.

3. In a molding machine, the combination of abase incorporating a cylinder having its axis arranged vertically, a piston operating within said cylinder, a ramming head sustained by the piston, a pattern carried by the ramming head, a flask adapted to be applied to the pattern, columns rising from the opposite ends of the base, a pressure head j ournaled upon the upper end of one of said columns for swinging movement in a substantially horizontal plane, the free end of said head being designed for holding engagement with the upper end of the other column, opposed flask sustaining arms pivotally supported on axes fixed with respect to the base, connections between said arms whereby their upper ends are caused to swing inwardly and outwardly together, a lever pivotally supported by one of the aforesaid columns, a rod having operative connections with the aforesaid arms and yielding connection with the lower end of said lever, means tending to rock said lever and, through the intervention of the aforesaid rod, move said arms in a direction to withdraw their upper ends from flask engaging position, the pressure head and said lever cooperating' to swing the lever' in opposition to said means when said pressure `head occupies operative position.

4. In a molding machine, the combination of two heads that are relatively movable toward and from each other along a given axis, one of the heads being shiftable to a position laterally of said axis, a pattern carried by one of the heads, a flask adapted to lll] be applied to thehpat-tern, flask 'arresting and lsustaining means movable :transversely of the path o movement of theflaskfmechaliism acting-to project said' means yinto the path of the yHash so es to receive the flask as the heads recede along said given axis, and fur-ther mechanism acting to WithdrawV v emily of seid exis.

said means fro-mirth@ path o fthe ask when' the laterally sh'itable head is moved lat-Y ln testimony whereof, l hereunto aix .my signature. v

.FRANK JE. MCGABE.

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