US2570717A - Machine for the continuous manufacture of casting molds - Google Patents

Description

Oct. 1951 R. A. M. RONCERAY 2,570,717

MACHINE FOR THE CONTINUOUS MANUFACTURE OF CASTING MOLDS Filed Sept. 10, 1948 2 Sheets-Sheet 1 AT TORN YJ R. A. M. RONCERAY Oct. 9, 1951 MACHINE FOR THE CONTINUOUS MANUFACTURE OF CASTING MOLDS 2 Shets-Sheet 2 Filed Sept. 10, 1948 //Y VENTOR ROE/FR? 4/14. RONCERAY XW/M Patented Oct. 9; 1951 MACHINE EoR'rHE CONTINUOUS-MANU- FACTUREOF CASTING MOLDS- Robert'Andr Marcel Ronceray, Thiais, France ApplicationSeptember 1 0, 1948, Serial No. 48,606

, In France April 23, 1948- 4 Claims;

My invention has for. its object. an. arrangement for the continuous execution of a foundry mold with considerable-economy in time and man power.

My inventionv has for its object. to carry out" the different operations required in a closed circuit so as toobtaina mass production even in the caseof molds. that are different from one another, the diiferent devices associated with the continuously operating machine and cycle. executing each a predetermined operation for the successive molds According to my invention, the mold-supporting members progress ina closed circuit along a rolling track in accordance. with a predetermined timing.

' My invention. has. for itsv object an improved turn-over member. for. the. removal. of. the .fi'nished mold.

The single figure of" the accompanying drawing that is divided into two sheets consisting of Figs. 1A and 1B thereof is a perspective View of a preferred embodimentof the invention. 7 As illustrated, the machine includes primarily a closed circuit constituted by a roller track I on which travel continuously thev bottom plates 234 Beginning from theright-h'and end of the roller track; the bottom plates pass first in front of the store 5 in which various p'at tern plates such as 6'! are stored in accordance with" a predetermined classification; the desired pattern plate 8 is selected and laid in front of the store on'the bottom plate lying. in front of it' andv is secured thereto through" any suitable known meansi Continuing their travel, the bottom plates carrying each a pattern plate pass in front" of the store; 9' containing the flasks of" which one is then secured to" the plattern' plate; The selected flask l2 andprovided with an exhaust at I3: The shaking sifter is supplied with. molding sand from a funnel lllals'osu'spendedfrom the bridge H and provided at its lower end with a spout [5 so as to fill the flask underlying it. The plates and'flaskgaretherr brought to" the rapping device 16 operated through shaking and cappedl0 arrives then underneath the shaking sifter II suspended to" a bridge member providedby any suitable means.

beyond the rapping device pass underneath a third sandy-feeding funnel l9 opening at 20 so as to' improve the filling of the flask after the. pressing. stage at It and before the levelling This beingdone, themold is finished and should be removed. To this purpose, the roller track is interrupted so as to forma gap for the insertion of the mold-releasing rollover 21. The latter is adapted to rock round its axis that is parallel to the direction of travel of the roller-track.

The rollover includes two diametrically opposed series of' roller track elements: one of which is located between securing means, shown as hooks 2'2, and adapted to register with the general roller track I; a second series is composed of. rollers 24" the axis of which are parallel to the axis of rotationof the rollover.

This rollover is' operatedas follows: It is rotated through 180 from the discharge position shown, so that the first series of roller track elements are now registering with the elements of the general roller track I. The hooks 22 and their supporting structure 22a which carries sa'i'd first series of roller track elements are in their lowest position, Then the flask 23 is introduced in the rollover; the. supporting structure is lowered by a known means such as a piston untilthe upper surface of theflask, covered by a plate, is applied against roller track. 24, Then the bottom plate and the model plate are clamped by the hooks 22 and the rollover is'rotated through 180";

I The flask containing the mold rests on the. track 24 and the supporting. structure is raised thus separating the model plate and. the mold. The latter is shifted toward the foundry onto the roller track. 25' perpendicular to the first track I and the rollers of which are. parallel to'roll'ersl l.

This being done, the rollover is again submitted to a rotation through 180 so as to r'eturn the bottom pl'ates and pattern plate'thereon into" alignment with the' roller track "I' over which they are transferred. backto a location in ff'rbnt' of the store 5', where the pattern plate may. be returned into the store for replacement by another one unless the same pattern plate is used again for." the constitution of a further identical mold.

Thejsand required for molding is fed. into the distributors 14-41 andll8 through. a conveyor;

Z6- carried at the upper end of the bridge 12 and cooperating with two scraper members 27 and 28 angularly adjustable with reference to the conveyor and adapted to deflect part of the sand into each of the funnels l4 and I! with which they register, while the funnel I9 is fed directly through the end of the conveyor 26. It is of advantage to provide along this conveyor 26 a gangway for the operators.

It is thus apparent that the different operations follow one another in time for a given bottom plate and are simultaneously executed for the different bottom plates lying at a time on the roller track. Thus, if ten successive operations are required for making a mold, while ecution of one mold, but in the machine considered, the ten operations may be carried out simultaneously for ten successive pattern plates,

so that in said ten units of time ten complete molds are made on ten identical or different pattern plates, a single device being required for each operation, so that maximum efiiciency is obtained.

The embodiment disclosed is of course given by way of mere exemplification and without any limitation beyond those appearing in the claims, any detail modification being brought, if required, without modifying the scope of the in- .ventionas defined in said accompanying claims.

What I claim is:

l. A machine for the continuous production of casting molds comprising in combination an endless roller track, at least one bottom plate a"apted to move along said roller track, a pattern plate store and a flask store located in the immediate vicinity of said roller track, a filling station for filling the flask with sand at a point of t e rolling track beyond said stores, sand funnels located above the filling station, a belt conveyor adapted to feed sand to said funnels, located above the roller track and to which the funnels are suspended, means carried by the belt conveyor above each funnel for feeding a fraction of the sand from the conveyor into the corresponding funnel, a rollover device beyond the last funnel comprising an annular member fitted in the roller track with its axis parallel to the longitudinal axis of the track at that point, means for securing to said annular member the bottom plates and associated pattern plates when engaging said annular member, two series of rollers carried by the annular member in two parallel planes parallel to the axis of rotation of said annular member, the axes of rotation of said series of rollers being respectively perpendicular and parallel to said axis of rotation in said planes and a second roller track located adjacent the rollover device at right angles to the first track and adapted to form a continuation of the track formed by the second series of rollers when the plane thereof is rocked through a corresponding angle, to receive the sand-filled flask from said second series of rollers.

2. In a machine for the production of sand molds, the combination of an endless roller track provided with two gaps, at least one carriage adapted to move over said roller. track and adapted to carry a selected pattern plate and flask, means for filling the flask with sand, at least at one point of its travel over the track, a rollover device inserted in a gap provided in said track beyond the last sand-filling means with its axis of rotation parallel to the line of progression provided on the track in register with the corresponding gap, said rollover including two guideways of which one is adapted to register with the roller track, the rotation of the rollover round its axis being adapted to shift the sand-filled flask from one guideway to the other and a second stationary track perpendicular to the first track and forming a continuation of the second guideway for a predetermined angular position of the rollover for the removal of the sand-filled flask.

3. In a machine for the production of sand molds, the combination of an endless roller track provided with two gaps, at least one carriage adapted to move over said roller track and adapted to carry a selected pattern plate and flask, means for filling the flask with sand, at least atone point of its travel over thetrack, a rollover device inserted in a gap provided in said track beyond the sand-filling means with its axis'of rotation parallel to the line of progression provided on the track in register with the corresponding gap, said rollover including two guideways of which one is adapted to register with the roller track, the rotation of the rollover round its axis being adapted to shift the sand-filled flask from one guideway to the other and a second stationary track perpendicular to the first track and forming a continuation of the second guideway for a predetermined angular position of the rollover for the removal of the sand-filled flask.

4,. In a machine for the production of sand molds, the combination of an endless roller track provided with two gaps, at least one carriage adapted to move over said roller track and adapted to carry a selected pattern plate and flask, means for filling the flask with sand, at least atone point of its travel over the track, a rollover device inserted in a gap provided in said track beyond the last sand-filling means with its axis of rotation parallel to the line of progression provided on the track in register with the corresponding gap, said rollover in cluding two guideways' of which one isadapted to register with the roller track, and an an.- nular member forming a latticed cylinder with a lateral aperture registering with thesecond series of rollers for allowing'the removal of the sand-filled flask for a predetermined angular position of the rollover, the rotation of the rollover round its axis being adapted to shift the sand-filled flask from one guideway to theother, and a second stationary track perpendicular to the first track and forming a continuation of the second guideway fora predetermined angular position of the rollover for the removal of the sand-filled flask.

-ROBERT ANDRE MARCEL RONCERAY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Behnke May 30, 1939

Images