US1102606A - Molding-machine. - Google Patents

Description

E. A. PRIDMORE.

MOLDING MACHINE.

APPLIGATION FILED 001226, 1912.

Patented July 7, 1914;

3 SHEETS-SHEET 1.

Jdwardfl Bz'dm are,

THIS NORRIS PETERS CO, PHOTO-LITHO. WASHINGTON, Dv C.

E. A. PBIDMORE.

MOLDING MACHINE.

APBLIOATION FILED 00w. 2B, 1912.

Patented July 7, 1914.

3 SHEETS-SHEET 2.

W, m w m Edward 725282720223,

THE NORRIS PETERS CO.. PHUTO-LITHO. WASHINGTON, D. C.

E. A. PRIDMORE.

MOLDING MACHINE.

APPLICATION FILED 001 26, 1912.

Patented July 7, 1914.

3 SHEETS-SHEET 3.

THE NORRIS PETERS (Tl). PHO'I'O-LITHQ. WASHINGTON, D C

' position.

EDWARD A. PRIDMORE, OF CHICAGO, ILLINOIS.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented July '7, 1914.

Application filed October 26, 1912. Serial No. 727,857.

To all whom it may concern:

Be it known that I, EDWARD A. PRIDMORE, a citizen of the United States, residin .at Chicago, in the county of Cook and tate of Illinois, have invented a new and useful Improvement in Molding Machines, of which the following is a specification.

My invention relates, more particularly, to flask-receiving and supporting means commonly provided in molding machines for receiving the rammed flask and supporting the same in the pattern-drawing operation, my present invention, having been devised for use, more particularly, in connection with molding machines of the type employing a turn-over pattern and flask-carrier, which latter is adapted, when in one to support the flask and pattern during the ramming operation, turned over to the other position operates to invert the flask and deliver it to a support preparatory to the pattern-drawing operation.

My object, generally stated, is to provide a novel and simple flask-receiving and supporting device which, when the flask is moved into engagement therewith, shall operate automatically to adjust itself to the flask employed, and which may be readily and quickly secured in automatically adjusted position for insuring the continuance of the correct relative positions of the flask and flask-carrier during the drawing of the pattern and be released'from such position, as desired.

Referring to the accompanying drawings Figure 1 is a view in side elevation, partly sectional, of a molding machine constructed in accordance with my invention. Fig. 2 is asection taken at the line 2 on Fig. 5 and viewed in the direction of the arrow, this view showing the machine invthe position it assumes during the pattern-drawing operation. Fig. 3 is a detail of the flask-clamp employed with its intermediate cross-brace and threaded rod therein omitted. Fig. 4: is a section taken at the line 4 on Fig. 8 and viewed in the direction of the arrow. Fig. 5 is an end view of the machine. Fig. 6 is an enlarged section taken at the line (i on Fig. 5 and viewed in the direction of the arrow; and Fig. 7 a section taken at the line 7 on Fig. 6, and viewed in the direction of the arrow.

The machine in connection with which I have chosen to illustrate my present invenand when tion is of the type illustrated and described in my said pending application and consists generally of a pattern and flask carrier journa-led on the machine to be swung through approximately an arc of 180", the carrier, when in one position, being adapted to receive a flask which, in practice, would be set over the pattern, and while in such position be rammed to form the mold and the carrier-flask and bottom board thereupon secured together, and when rocked from said position to its other position, to invert the flask and deliver it to a flask-support, whereupon the pattern is lifted bodily out of the mold.

The frame of the machine illustrated, which forms the support for the operating parts thereof as hereinafter described, is represented at 10 and is shown as supported on three wheels 11 and 12 for facilitating the shifting of the machine from one place to another, the wheels 11 being located at one end of the frame and the wheel 12 at the other end thereof. The frame 10, at its opposite sides and intermediate the wheels 11 and 12, is provided with a pair of vertically-disposed guide-posts 13 containing vertical, preferably lined, bores 14, which form guides for reciprocable rods 15 slidably confined in said bores. The upper ends of the rods 15 are provided with enlarged heads 16 which serve as stops forlimiting the downward movement of the rods in the posts 13, these heads being connected together by a shaft 17 journaled therein at its opposite ends. Rigidly connected with the shaft 17 is a pattern and flask-carrier 18 formed of a table-section 19, which, in the position of the machine represented in Fig. 1, rests against a stop 20 on the frame 10, and arms 21 rigid with the section 19 and extending upwardly from a side of the latter and rigidly connected at their upper ends with the shaft 17, whereby the carrier 18 is marginally hinged to the upper ends of the rods 15 to permit the carrier to be swung upon these rods for the purpose hereinafter described. The heads 16 are provided on their inner sides with stub-shafts 22 upon which depending links 23 are pivoted at their up per ends, the lower ends of these links being provided with laterally projecting stubshafts 24 at which these links are pivotally connected with the forward ends of spaced levers 25 rigid with a sleeve 26 journaleol on a shaft 27 fixed in opposite sides of the ed in Fig. 1.

frame The'stub-shafts 24 extend beyond the levers 25 and form. pivotal connections for the lower ends of coiled springs 28, the upper ends of these springs being secured to lugs 29 rigid with the arms 21'of the carrier 18, but preferably diametrically op-' posed thereto, the springs 28 being so ten-' sioned that when the carrier 18 is in the position represented in Fig. 1, they will be under sufficient tension to substantially counterbalance the carrier when loaded, whereby the loaded carrler may be readily ndltion, for.

swung by hand to inverted co as that represented at 30 and connectedwith the carrier, is in inverted condition. The pattern 30 is preferably secured to boards 31 and the latter to the section l9'of the carrier .to hold these parts rigid, as by means of screws 31*. To make a mold from the pattern 30, a flask such as that represented at 32 is placed 'over the pattern and seated against the uppermost board 31. The molding sand is then rammed into theflask according to the usual practicev of making molds, and the bottom board 33 is. then placed over the upper end of the flask.

After preparing the mold asdescribed, the flask 32 and bottom board 33 are rigidly clamped to the carrier 18 in the positions illustrated in Fig. 2, by means of clamping mechanism, a description of the preferred embodiment of which is as follows: The

clamp-proper, which is represented at 34, is

formed of a pair of spaced rods35 of U- shape, which are braced as indicated at 36 and 37, the brace 37 containing a threaded opening 38 in which an adjusting screw 39 operates. The rods 35 at one end are connected together byjan integral loop-section 35*, and at their opposite ends each'is provided with a head 40 formed into the hook 41 and equipped witha guide-lug 41 The clamp 34 releasably engages at its hooks 41 j with the shaft 17 and extends across the upper end of the flask, the head 42 on the clamping-screw 39 hearing against the top surface of the bottom board 33 as represent- The clamp 34 is releasably held in position for clamping the flask 32 and. bottom board 33 to the carrier 18 through the medium of a link 43 which is bifurcated atits upper end to present arms 44 and is pivoted at its lower end to the carrier 18 beyond the flask as indicated at 45, the link 43 being adapted to interlock at the offset portions 46 of the arms 44 with the. section 35 of the clamp 34.; In order that the clamp 34 may be releasably interlocked with the link43 as stated and released therefrom as desired, I provide a lever 47 which is located between the offset portions 46 of the arms 44 and is pivoted on a shaft 48 secured in thesearms. The lever 47 is provided with lugs 49 and 50 which extend beyond its pivotal connection with the link 43 and through the medium of which lugs the lever 47 serves to either spring the strap-section '35 the clamp 34 into interlocking engage- -ment with the offset portions 46 of the arms 44 or disengage it therefrom depending upon the direction in which the lever 47 is operated, the under surfaces of the oflset portions 46 of the arms 44 being preferably slightly concaved, as represented at 51, in order that the clamp 34 maybe held in interlocking engagement with the link 43 against accidental release. In the preferred construction illustrated, the lever 47 merely operates to either spring the strap-section 35 into interlocking engagement with the link 43, or disengage it therefrom, and does not assist in the holding operation. The screw 39 should be so adjusted in the brace 37 that when the clamp' 34 is interlocked with the link 43 as stated, the rods 35 will be placed under relatively great tension for holding the bottom board 33'rigid on the flask 32 and thelatter against shifting relative to the board 31 and pattern 30. v

After the flask and the bottom board have been clamped'to the carrier 18 as stated, the operator swings the loaded carrier to the right in Fig. 1 through one-half of a revolution to a position in which lugs 52 on the carrier 1'8 abut against stop-lugs 52 carried by the heads 16, the stops 53 serving "to support the carrier 18 and the parts carried thereby.

' In swinging the carrier at, its hinge-connection with the rods 15 as stated, the pat tern 30 and flask 32 are moved from -in-' verted to uprightcondition, and the latter is delivered to flask-supportsv 54, construct:

ed in accordance with my invention, .for

sustaining the flask duringv the patterndrawmg, operation,

a description of the preferred form in which said flask-supports are provided being as follows: the frame 10 at its opposite sides are screwstandards 55 which are rendered adjustable up. and down by reason of their threaded engagement with the framelO, lock-nuts 56 screwing upon these standards serving to maintain the latter in adjusted position.- Each of the standards 55 carries, at its upper end, a flask-supporting device 57, each of said devices being formed of a casing 58 open atopposite ends thereof and into socketc 59 in the lower ends of which the upper ends of the respective standards 55 extend, the casings v58 being rigidly connected with these standards as through the medium of pins 60. Pivoted on shafts 61 hired in opposite sides of each casing 58 and adjacent to its opposite ends are rock-levers 62, the outer Screwing into ends 63 of which, under the action of leafsprings 64 partially surrounding bosses 65 on the levers 62 and engaging at their free ends with the under sides of the tops of the casings 58 and with pins 66 on the inner ends of these levers, normally extend in the upwardly-inclined position represented in Fig. 1, in which they project above the easing 58. The inner ends of the levers 62 are of segmental form, and co6perating with the arc-shaped surfaces 67 thereof are shoes 68 which are pivoted at their lower ends on bolts 69 secured in opposed walls of the casings, these shoes presenting arcshaped surfaces 70 extending adjacent to the surfaces 67 of the levers 62. Pivoted on pins 71 fixed in the walls ofextensions 72 of the casings 58 are rock-members 73 which extend transversely of the adjacent shoes 68 and the opposed side-walls of which converge upwardly as represented at 74, whereby the members 73 are rendered wedgeshape in cross-section the portions of the shoes 68 adjacent to the members 73 being provided with lugs 75 presenting upwardlyconverging surfaces 76 which oppose ;the surfaces 74 on the members 73, whereby when the latter are rocked upwardly on their pivots 71, as hereinafter described, they will force the respective shoes 68 into rigid clamping engagement with the levers 62 and hold the latter against turning on their pivots 61. The levers 77, which are pivoted on the casings 58 as indicated at 78 and are pivotally connected, as indicated at 79, beyond the pivots 78 to upwardly-extending links 80 having pivotal connection at their upper ends with the outer ends of the members 73 as indicated at 81, operate as the medium through which the rock-members 73 are operated for the purpose stated.

As the carrier 18 nears the limit of its turning movement, as hereinbefore described, the bottom board 33 engages with the upper ends 63 of the levers 62, and in coming to rest against the stops 53 swings the levers, 62 downwardly against the action of the springs 64 to a point at which these levers become automatically adjusted to the position assumed by the bottom board 33. The operator thereupon swings the levers 77 downwardly, thereby swinging the members 73 upwardly and by reason of the wedging action produced against the shoes 68, forcing the latter into clamping engagement with the levers 62, thus locking the latter in rigid condition for securely supporting the flask 32 when the latter is released from the carrier as hereinafter set forth. After the levers 62 have been set in the positions automatically assumed by them as stated, the operator releases the clamp 34 from engagement with the link 43 by swinging the operating lever 47 to a position in which the lug 50 engages with the strap-section 35 of the clamp and springs it out of interlocking engagement with the offset portions of the arms 44. The clamp 34 thus released, swings at its hook-portions 41 upon the shaft 17, its brace-bar 36 automatically entering the space between the upper and lower arms 82 and 83 respectively of a fork-member 84 secured to the frame 10, and its opposite free end resting on the frame as indicated in Fig. 2, the hook-portions 41 of the clamp 34, when the latter assumes the position just stated, being withdrawn to aposition in which they extend out of the path of upward movement of the shaft 17 as represented in Fig. 2, whereby the shaft 17 and the parts carried thereby may be raised for the purpose hereinafter described, without disturbing the position assumed by the clamp-bar 34 as represented in the last referred to figure. The lugs 41 by extending in the rear of the shaft 17 operate, upon the release of the clamp 34, as stated, to insure the positioning of the latter as explained. The flask having been thus transferred from the carrier 18 to the flasksupports 54, the next operation is that of withdrawing the pattern 30 from the mold,

and this is accomplished by bodily raising the rods 15, and all of the parts carried thereby, through the medium of a foot-lever 85 which is rigidly connected with the sleeve 26 and when depressed operatesto swing the levers 25 upwardly, and through the medium of the links 23, elevate the rods 15, springs 28 and carrier 18 to a position in which the pattern 30 is drawn from the mold as represented in Fig. 2, the rods 15 in this operation moving in the posts 13 for guidance. To minimize the power required for elevating the carrier 18 as described, I provide a coiled spring 86 which is secured at one end to the frame of the machine and at its opposite end to a depending lug 87 on the sleeve 26. It will be noted that in the pattern-drawing operation described,the pattern is moved in a path at a right-angle to the mold which insures the pattern being withdrawn from the latter without impairing the mold.

The springs 28 are preferably so tensioned that they tend to swing the carrier 18 and the pattern 30 to raised position when the mold is released therefrom as described, in which. case the operator bears down on the carrier for maintaining the lugs 52 in engagement with the stops 53 during the operation of bodily raising the carrier and its supports as hereinbefore described. Thus, as soon as the rods 15 have been raised sufficiently far to draw the pattern from the mold, the operator releases his grasp on the carrier and permits the latter to swing upwardly. The operator thereupon. removes the pressure from the foot-lever 85, permitting the rods 15 and the parts carried thereby to descend. The mold is then removed from the flask-"supports 5'4 and the carrier 18 swung back to the normal position repreby the operator grasping the free end of the clamp and lifting it, thereby causing the hooks to be automatically projected over the shaft 17 and swinging upon this shaft as a pivot. It will be understood that preparatory to each operation of delivering a filled flask to the flaslesupports 54 as described,

the rock-levers 62 are released to permit. them to assume normal conditlon, namely,

that illustrated in Fig. 1, by operating the levers 7 7 reversely to that hereinbefore dej a I q members fulcrumed thereon to rock up and In order to avoid any danger of impairment to the machine should the carrier 18 scribed.

be swung overthe center of its axis when moved from the position in which it extends-- over the supports 54, I provide stops, 88 on the carrier whlch cooperate with the heads 16 and limit the movement of the carrier.

Through the medium of thescrew-standards 55 the supports 54 may be raised or lowered as desired to adjust the machine for use with flasks of varying heights.

It will be observed that in the construc-' tion illustrated two, of the flask-engaging fingers 62 are provided at each side ofthe machine, thus affording a support for the flask at four different points, and that only" two levers are required to be-operated for setting and releasing the four fingers 62, this feature of my machine beingof impor: tance as but one-half the time is required in' my construction for setting and releasing the flask-supporting fingers as compared with the time required for operating the devices employed for this purpose in prior constructions.

In carrying out my invention I prefer to provide springs, as described, for cooperation with the levers 62 to hold them yieldingly in raised condition under spring-ten sion, but it will be manifest to those skilled in the art that in the illustrated embodiment of my invention these springs may be omitted, if desired, and the unbalanced weight of the levers 62 tending to move them to a position in which an end of each thereof is raised, be relied upon to hold said levers yieldingly in raised condition.

The features herein shown and not claimed are included in my application Serial No. 631,292, filed June 5, 1911, patent ed May 21, 1912, No. 1,027,066.

WVhile I have illustrated and described the of independently adjustable members fulcrumed thereon to rock up and form of flask receiving and supporting device which I now consider to be the preferred form in which my invention may be embodied, and a modification thereof, I do not wish to be understood as intending tov limit my invention to-suc'h forms, as varlous changes and alterations may be made therein without departing from the spirit of my invention. 1 Furthermore, by. illustrating and describing my improved flask-receiving and supporting device in'connection with a particular type of turn-over pattern and flask carrier, 1 do not wish to be understood as intending to limit it to its use in this connection,"it being my desire to claim it for use inany situation in which it may have utility.

What I'claim as new, and desire to secure by LettersPate'nt, i's r 1. In a flask-receivingand supporting device, the combination of a base, a plurality of independently adjustable flask-engaging down and each adapted to contact-at one end only with a flask seating thereon, and means for holding said members in independently adjusted positions.

2. Flask-receiving and supporting means comprisingin combination a base, a plural ity of flask-engaging members fulcrumed thereon to rock up and down and each adapted to contact at one end only with a flask resting thereon, and means for yieldingly holding said members in raised position. j

3. Flask-receiving and supporting means comprising in combination a base, a plurality of 'flaslr-engaging members fulcrumed thereon to rock up and down and each adapted to contact at one end only with a flask resting thereon, and springs for yieldingly holding said members in raised position. I

4. Flask-receiving and supporting means comprising, in combination, a base, a plurality of yieldable flask-engaging members fulcrumed thereon to rock up and down,

and means for releasably securing said members in the positions to which they are automatically moved when engaged by the flask.

5. In a flask-receivingand supporting device, the combination of a base, a plurality flask-engaging down and each adapted to contact at one end only with a flask se'atingthereon, and means for lifting the flask-engaging ends of said members and yieldingly-holding them in raised condition,

6. In a flask-receiving and supporting device, the combination of a base, aplurality of independently adjust-able flask-engaging members fulcrumed thereon to rock up and end only with a flask seating thereon, and

* down and each adapted to contact at one,-

springs for raising the flasleengaging ends of said members and yieldingly holding them in raised condition.

7. In a flask-receiving and supporting device, the combination of a base, a plurality of independently adjustable flask-engaging members fulcrumed thereon to rock up and down and each adapted to contact at one end only with a flask seating thereon, means for lifting the flask-engaging ends of said members and yieldingly holding them in raised condition, and means for securing said members in the positions to which they are moved when engaged by the flask.

8. In a flask-receiving and supporting device, the combination of a base, a plurality of independently adjustable flask-engaging members fulcrumed thereon to rock up and down and each adapted to contact at one end only with a flask seating thereon, springs for raising the flask-engaging ends of said members and yieldingly holding them in raised condition, and means for securing said members in the positions to which they are moved when engaged by the flask.

9. Flask-receiving and supporting means comprising, in combination, a base, a plurality of flask-engaging members .fulcrumed thereon to rock up and down, means for yieldingly holding said members in raised position, and means for releasably securing said members in the positions to which they are automatically moved when engaged by the flask.

10. Flask-receiving and supporting means comprising, in combination, a base, a plurality of flask-engaging members fulcrumed thereon to rock up and down, means for yieldingly holding said members in raised position, and means for releasably securing said members in the positions to which they are automatically moved when engaged by the flask.

11. Flask-receiving and supporting means comprising, in combination, a base, a plurality of flask-engaging members fulcrumed on said base to rock up and down thereon, means tending to yieldingly hold said members in raised position, and brake mechanism for releasably securing said members in the positions to which they are moved when engaged by the flask.

12. Flask-receiving and supporting means comprising, in combination, a base, a plurality of flask-engaging members fulcrumed on said base to rock up and down thereon,

'means tending to yieldingly hold said members in raised position, and brake mechanism for releasably securing said members in the positions to which they are moved when engaged by the flask.

13. In a molding-machine, flask-receiving and supporting means comprising, in combination, a plurality of pivotally supported flask-receiving and supporting members,

means for yieldingly holding said members in raised position, pivotally supported brake-levers cooperating with said members, and a rock-member for operating said brake levers, for the purpose set forth.

14:. In a molding-machine, flask-receiving and supporting means comprising, in combination, pivotally supported flask-receiving and supporting members, means for yieldingly holding said members in raised position, pivotally-supported brakelevers cooperating with said members, and wedging mechanism for operating said brake-levers, for the purpose set forth.

15. Flask-receiving and supporting means comprising, in combination, a base, pairs of flask-engaging members fulcrumed on said base to rock up and down thereon and normally extending in raised position, and a single device for each pair of said members for releasably securing the latter in the positions to which they are moved when engaged by the flask.

16. Flask-receiving and supporting means comprising, in combination, a base, pairs of flask-engaging members fulcrumed on said base to rock up and down thereon, means for yieldingly holding said members in raised position, and a single device for each pair of said members for releasably securing the latter in the positions to which they are moved when engaged by the flask.

17. Flask-receiving and supporting means comprising, in combmation, a base, pairs of flask-engaging members fulcrumed on said base to rock up and down thereon and normally extending in raised position, and a single device operating by frictional contact with said members to releasably hold the latter in the positions to which they are moved when engaged by the flask.

18. In a flask-receiving and supporting device, the combination of a base, pairs of independently adjustable flask engaging members fulcrumed on said base to rock up and down thereon and each adapted to contact at one end only with the flask, and a single device for each pair of said members for releasably securing the latter in independently adjusted positions.

19. In a molding-machine, flask-receiving and supporting means comprising, in combi nation, pairs of pivotally supported flaskreceiving and supporting members, means for yieldingly holding said members in raised position, pivotally-supported brakelevers located adjacent to said members, and means cooperating with each pair of brakelevers for operating the latter, for releas ably securing said members in automatically adjusted position, for the purpose set forth.

20. In a molding-machine, flask-receiving and supporting means comprising, in combination, flask-receiving and supporting members pivotally supported between their ends,

surfaces cooperating with the curved SUP-- faces'of said members, and means for oper atlng said levers, for the purpose set forth.

21. In a molding-machine, flask-receiving; l

and supporting means comprising, in combi nation, flask-receiving and supporting mem-v bers pivo-tally supported between their ends, means for yieldingly holding said members: at their upper ends in raised position, brake-. levers pivoted on the machine adjacent to the lower ends of said members, wedging members pivotally connected with the machine and located between pairs of said brake-levers, and means for actuating said; wedgi'ng-members, for the purpose set forth,

22; In a molding-machine, flask-receiving} and supporting means comprising a plurality of members pivotally supported in unbalanced condition and'means for releasably securing said members in the positions tor j which they are automatically moved when engaged by the flask, for the purpose set forth. I i 1 T porting members,

brake-levers, for the purpose set 23. In a molding-machine, flask-receiving balanced condition and bral'ze-mechanism' for releasably securingsald members 1n the positions to which they are moved when en gaged by the flask. I

24. Flask-receivingfand supporting means comprising in combination, a plurality of 'yieldable pivotally supported flask-receiving and supporting members, pivotally supported 'brake levers cooperating with-said members, and a rock member for operating said brake-levers, for the purpose set forth.

25. Flask-receiving and supporting means ported yield'able flaslpreceiving an supand wedging mechanism for operating said forth; EDWARD A; PRIDMORE. In presence of O G. AvIsUs, NELLIE B. DEARBORN.

Copies of this patentmay be obtained for five cents each, by agidressjng the Commissioner 01'. Batents,

. Washi gt 1 -0 pivotally supported. 4 brake-levers cooperating with, said, members,

comprising in combination, pivotallv sup-

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