US862073A - Molding-machine. - Google Patents

Description

PATENTED JULY 30, 1907.

A. & D. HELLER. MOLDING MACHINE. APPLICATION FILED SEPT. 22,1906.

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No 862,073. PATENTEDQJULY so, 1907. A. & 1). HELLER.

MOLDING MACHINE.

APPLICATION FILED saw. 22. 1906.

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PATENTED JULY 30, 1907.

A. & D. HELLER.

MOLDING MACHINE.

APPLICATION FILED SEPT. 22, 1906.

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No. 862,073. PATENTED JULY 30, 1907.

- A. & D. HELLER.

MOLDING MAOHINE.

APPLICATION FILED SEPT. 22, 1906.

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UNITED STATES PATENT FFTCE.

ADAM HELLER AND DAVID HELLER, OF BALTIMORE, MARYLAND; SAID ADAM HELLER ASSIGNOR TO SAID DAVID HELLER.

MOLDING-MACHINE To all whom it may concern:

Be it known that we, ADAM HELLER and DAVID HELLER, citizens of the United States, residing at Baltimore city, State of Maryland, have invented certain new and useful Improvements in Molding-Machines, of Which the following is a specification.

This invention relates to molding machines, and especially to the class of machines for forming sand molds such as are used in the manufacture of cast-metal pipe, pipe fittings and other analogous articles.

The object of the invention is to provide, in a molding machine, means to automatically control successive charges of sand from a hopper to a sand box, and from the latter to a flask.

A further object of the invention is to provide, in a molding machine, a flask cover adapted to be swung to open and close the flask and thereby operate a pair of slides or cut-off plates for delivering successive charges of sand to the flask.

A still further object of the invention is to provide, in a molding machine, a swinging flask cover adapted to slide a pair of shutters or cut-off plates alternately to deliver successive charges of sand first to the sand box and then to the flask simultaneously with closing and opening, respectively, of the flask by the said cover.

A still further object of the invention is to provide, in a molding machine, a flask cover hung to swing separate and independently of the flask, a rammer carried by the cover and adapted to be coupled to the cover when the latter is raised, and means carried by the cover to lock it in closed position and to release the rannner when the cover is closed.

Various other advantages, improved results and details of construction, combinations and arrangements of parts will be found in the specification and claims to follow.

In the accompanying drawings, forming part of this application: Figure 1 is a front view of the machine. Fig. 2 is a section on the line x'.t, Fig. 1, showing the flask cover in open position, with the conveyer, the flask and its truck removed, and the flask lifter partly broken away. Fig. 3 is a detail top view of the flask cover showing in dotted lines the movable position of its parts. Fig. 4 is a section on the line yy, Fig. 3. Fig. 5 is a detail top view of the flask lifter, the dotted lines showing the movable position of the levers. Fig. 6 is a perspective view of the slides or cut-offs, and their operating levers. Fig. 7 is a perspective view of one of the lift-dogs. Fig. 8 is a side elevation of the flask lifter and carrier partly broken away.

The same reference numerals denote the same parts throughout the several views of the drawings.

The sand hopper 1, has a neck 2 inwhich is located a sand sifter composed of shaker plates 3, operated by Specification of Letters Patent.

Application filed September 22, 1906- Serial No. 335,810.

Patented July 30, 1907.

eccentrics 4, and eccentric rods 4, which are worked by an eccentric shaft 5, from a main shaft 6 to slide the plates back and forth lengthwise. The shaft 6 drives the endless conveyer 7, by a chain 6, and sprocket wheels 7, and the conveyer carries the sand from under the carriage 8, as the latter is moved up to and over a sand dump or pile, into the hopper whence it is sifted into the hopper neck. The carriage has a suitable track 1, on which a truck 2 travels with a molding flask 3.

Depending from the hopper-neck 2 is a sand-box 9, between which and the said neck is operated a pair of slides or cut-offs 10, each of which is pivotally connected by links 11 to a bar 12, pivoted to a projection 13 from the sand-box. The cut-offs 10 have extensions 14 to prevent displacement in their sliding movement; The bar 12 has one end of a swinging arm 15 pivoted thereto and the other end of said arm is loosely hung from a guide bracket 16 on the sand-box by a bar 17 pivoted to the said loose end and working through said bracket. The bottom edge of the bar 12 is provided with lugs 18 and 19, so as to leave a space between them into which the free side edge of the flask cover 20 is swung.

The cover 20 is hinged at 21 to be swung vertically over the flask and under the sand-box by levers 22, connected together at their outer end by a handle 23, and pivoted at their inner end to standards 24-, which limit the upward movement of the lovers 22, in working the sand rammer 25, which depends from the cover 20, and is hung from the standards 24, and the lovers 22, by projections 26 extending from the ranimer through slots 27, in the cover 20. These projections26 are pivoted to levers 28 which are fulcrumed to the said projections and pivoted to links 29 which are pivoted to the levers 22. The cover 20, levers 22, handle 23, bar 12, and the mechanism connecting said bar with the slides or cut-offs constitute means for operating the cut-offs.

The means for automatically locking the cover and releasing the rammer, and for unlocking the cover and coupling the rammer thereto, comprises a latch-plate 30, slidably secured to the cover 20, and adapted to engage under a keeper 31, on the machine frame 32, and the lift-dogs 33, connected to the latch-plate 30, by links 34. The plate and the dogs are operated by a handlever 35 pivoted to a bracket 36 on the front frame portion of the machine, and having a pair of links pivoted together, one of which links 37 is pivoted to the lever 35, and the other link 38 is hinged to the latch-plate 30. The dogs are pivoted at 39 to the cover 20, and both being alike, only one of them will be described in detail; it has a pivot hole 40, and its free end has a curved or beveled lug 41, to insure its passage under the levers 28, and terminating in a top bearing 42 upon which the levers 28 rest when the rammer is coupled to the cover 20, and the latter is unlocked. I

The flask-lifter comprises a pair of arms 43 having at their rear ends adjustable weights 44, links 45, pivoted to the sand box 9, and to said arms, and an expansible flask carrier swung from the front end of the arms 43. The said carrier consists of a pair of hangers 46 pivotally hung from the front end of the arms 43, and having inward projections 47, a bracket 48 revolubly connected to the free end of each hanger 46, and provided with apertures 49 for the flask handles 50. The means for expanding the carrier preparatory to having the brackets 48 receive and discharge a flask, and for fixing and "releasing said brackets with respect to the hangers 46, comprises levers 51, one of which is pivoted to each projection 47 of the hangers 46, said levers having notches 53 to engage the brackets 48, and a suitable handle 54, for raising and lowering the levers 51, and for guiding and operating the flasklifter; a pair of toggle levers 55 having one end secured to the levers 51 and the other end pivoted to a hand lever 56 is provided for expanding and contracting the flask carrier. The main shaft 6 being operated, operates the conveyer and the eccentric shaft 5-, which operates the eccentrics 4, and the eccentric rods 4 to slide the shaker-plates lengthwise.

The conveyor and the sitter being in operation, a truck holding a flask in position to be filled, and the cover 20 down, the operation of the other parts is as follows: Thehand lever is pushed inwardly, which unlocks the cover, and slides the dogs under the levers 28, thus leaving the cover free to be swung with the rammer coupled thereto, the handle 23 is then depressed to raise or swing the cover and the rammer together upwardly into vertical position, as the cover is thus swung its free side edge strikes the lug 19 of the arm 15 and operates the cut-off lever and links to withdraw the lower slide or cut-off and open the bottom of the sand-box to permit the sand to fall from the sand box into the flask, the top slide or cut-off having been pushed inwardly to close the top of the sand-box during the withdrawal of the bottom cut-off, prevents the sand entering the box while the flask cover is in raised position. The handle 23 is now raised to lower the cover and the rammer together, which throws the said cover-edge against the lug 18 of the bar 12 and reverses the relative position of the cut-offs as the cover descends over the flask so as to open communication between the sand box and the funnel neck and to close the bottom of the sand box, the hand-lever 35 is then pulled thereby withdrawing the dogs from under the levers 28 and sliding the latch under the keeper so as to lock the cover above the flask and leave the rammer free to pack the sand in the flask, which is accomplished by working the hand-lever 23. When the flask is sufficiently packed the rammer is raised and the flask run out on the truck, where the flask is removed by the flask-lifter and flask carrier in the manner now to be explained: The hand-lever 56 is moved to the left which expands the carrier while the brackets 48 are slid in locked position onto the flask handles, this lever being released contacts the carrier, the handle 54 is used to swing the flask into desired position, then the handle 54 is raised to release the brackets and permit them to be turned as desired to deposit the flask while the brackets are again held expanded.

It is obvious that variations in details of arrangement and construction of parts may be made in the practical application of the invention, that the ma chine may be driven wholly or in part either by hand or other power, and that while the machine is exemplifled for pipe molds it is quite adaptable for molds of various other characters.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a molding machine,-a sand receiving and discharge box or chute, a swinging rammer, and means operated by the swinging of the rammer for successively holding and releasing charges of sand in and from the chute.

2. In a molding machine, a sand-box or chute, a swinging rainmer, slides in the box or chute, and means by which the rammer is swung for operating the slides to alternately open and close the top and bottom of the box.

3. In a molding machine, asandbox or chute, a swinging flask-cover, a rammer carried by the cover, means for swinging the cover, and means operated by the cover to open and close the discharge from the box into the flask simultaneously with the raising and lowering of the cover.

4. In a molding machine, a sandbox, a flask cover hav ing a sand entrance and exit adapted to swing under the box and over the flask, a rammer carried by the cover, means for swinging the cover, and means operated by the movement of the cover to open and close the sand entrance and exit of the box simultaneously with the lowering and raising of the cover.

5. In a molding machine, a flask cover and a rammer hung to swing jointly over the flask, a sand-box above the path of the cover and having a sand entrance and exit, nieanscarried by the cover to operate it and the rammer, and means operated by the cover to alternately open and close the sand entrance and exit of the box simultaneously with the raising and lowering of the cover.

6, In a molding machine, a flask cover hung to swing vertically over the flask to open and close it, a sandbox above the path of the cover, a sand rammer carried by the cover, means for swinging the cover and operating the rammer, and means operated by the cover to furnish successive charges of sand from the box to the flask.

7. In a molding machine, a sand-box, slides carried by the box for successively charging the box with and releasing therefrom compacts of sand, a flask cover, a ramrner hung from the cover, means for swinging the cover and working the rammer, and means operated by the cover to work the slides for eftecting said charge and release simultaneously with the raising and lowering of the cover.

8. In a molding machine, the combination, with a rammer, and a flask cover having the rammer hung therefrom, of means for coupling and releasing the rammer and cover, and means for swinging the cover and for operating the rammer.

9. In a molding machine, the combination with a flask cover and a rammer, of means for swinging the cover under which the rammer is hung, and means for fixing the ramnier to and releasing it from the cover. 7

10. In a molding machine, the combination with a flask, a flask cover independent of the flask, and a rammer operated from the cover, of a cover lock, and means operated by the movement of the lock to couple and uncouple the rammer with the cover.

11. In a molding machine, the combination with a swinging flask cover a rammer carried by the cover, a sand box, and a pair oi slides working therein, of an arm having lugs engaged by the said cover to work the arm, and the connections between the said arm and the slides to operate the latter.

12. In a molding machine, the combination with a swing ing flask cover, a sand rammer hung from the cover, and means for swinging the cover, of a latch to lock the cover above the flask, a pair of dogs to fix and release the rammer with respect to the cover, and means for operating the latch and the dogs.

13. In a molding machine employing suitable flasks, a

sand hopper, a pair of slides or valves working through the hopper, a flask cover hung to swing under the valves, a rammer carried by the cover, and mechanism to lock and unlock the rammer with the cover and to lock the cover over the flask simultaneously with said unlocking of the rammer.

14. In a molding machine, employing suitable flasks, a sand hopper, swinging flask-cover, means operated by the cover for supplying sand to the flasks a rammer hung from the cover, and adapted to be locked to the cover when the latter is raised and unlocked when lowered to permit independent working of the ramnler in a ramming operation, and means for locking and unlocking the rammer.

15. In a molding machine, a sand-box, a pair of connected slides or valves adapted to measure successive charges of sand to the sand-box, and from the latter to a flask, an arm connected with the slides and extending under the latter, a swinging flask-cover adapted to 811-,

gage said arm for operating the slides, and a rammer car ried by the cover.

16. The combination with a mold flask, a flask cover hinged above the flask to leave a space therebetwcen, a rammer hung from the cover, and means for operating the rammer in said space, of the dogspivoted to the cover. and means for operating the dogs to couple and uncouple the rammer and the cover.

17. The combination, with a mold flask, of a Ilaslvcover, a rammer swingable with the cover and operated through the latter for ramming, and means for swinging the cover over the flask and operating the rammer,

18. The combination with a mold flask, a flask cover, a rammer carried by the cover, and means for giving the cover a hinge movement over the flask without contact therewith, of a latch slidable on the cover, and a pivoted hand lever having pivot and hinge connections with the latch to lock and release the cover.

19. The combination with a mold flask, a flask cover hinged independently of the flask, means for swinging the cover, and a rammer hung from the cover, of a latch slidable on the cover, a pair of dogs pivoted on the cover, a pair of links pivotally connecting the latch with the dogs, a pivoted hand lever, and the links having hinge and pivot connections, respectively, with the latch and the said hand lever for operating the latch and the dogs.

20. The combination with a mold flask a flask cover, dogs pivoted to the cover, and levers pivoted to the cover for swinging the latter independently of the flask, of a rammer pivotally hung from the levers and depending from the cover so as to be operated by said levers, a pair of dogs pivoted to work perpendicularly to the movement of said levers, a latch connected to the dogs, a hand lever connected to the latch for locking and unlocking the cover and for operating the dogs to couple and uncouple the rammer with the covei:

21. -In a molding machine employing suitable flasks, the combination, with a sandbox, a swinging flask-cover, a rammer carried by the cover, and a pair of slides or valves, of an arm adapted to be worked by the cover, and the connections between the said arm and the slides to operate the latter for alternately opening and closing the top and bottom of said box.

In witness whereof we hereunto set our hand in the presence of two witnesses ADAM HELLER. DAVID HELLER. Witnesses GEO. L. MATTINGLY, FREDERICK ERcK.

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