US697134A - Molding apparatus. - Google Patents

Description

N0. 697,84. Patented Apr. 8, i902.

C. ll. DAY.

momma APPARATUS.

(Application filed Oct. 17, 1901.)

(Mo Modem STATES PATENT OFFICE.

CHARLES M. DAY, OF IIOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF I'IOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 697,134, dated April 8, 1902.

Application filed October 17, 1901. Serial No. 78,928. (No model.)

To aid whom, it may concern: pitch of the spiral thread of the pattern. I Be it known that I, CHARLES M. DAY, a citihave also shown the apparatus arranged for zen of the United States, and a resident of the formation of a plurality of molds simul- IIopedale, county of WVorcester, State of Mastaneously; but manifestly a single pattern 5 sachusetts, have invented an Improvement could be used to form asingle mold, and such in Molding Apparatus, of which the following construction clearly is within the spirit and description, in connection with the accompascope of my invention. nying drawings, is a specification, like letters Referring to Figs. 1. and 2, a base-plate A, and numerals on the drawings representing of suitable .shape and size to sustain the parts [0 like parts. of the apparatus,is mounted on legs A in or- This invention relates to apparatus for fader to bring the upper portion of the apparacilitating and improving the construction of tus into convenient position, the base-plate molds for metal-founding, whereby very 'achaving erected upon it four standards A curate and fine molds can be rapidly conwhich supporta horizontal guide-plate G,

I 5 structed without the use of highly-skilled and which is provided with a series of upright expensive labor, the general type of apparatubular bearings g, one for each pattern-cartus to which my invention belongs containrier, to be described, and in the present eming as essential features a stripper-plate and bodiment of myinventionlhave provided for a relatively movable pattern. eight pattern-carriers arranged, as shown in 20 My present invention has for its object the Fig. 2, in two rows of four each. The guideproduction of improved molding apparatus of plate has upturned corner-posts g to the upthe general type referred to with novel means per ends of which is secured a stripper-plate for drawing the pattern, and more espe- S, the stripper-plate being used in the concially when the pattern must have imparted struction of the mold to form the parting- 25 thereto a compound movement to draw it face thereof in a manner well known in the from the mold. art of machine-molding. The stripper-plate The various novel features of my invention is provided at its opposite ends with horizon- Will be hereinafter described in detail in the tally-extended ears 8 3, one of them, as the specification, and particularly pointed out in ear 8, having a hole 2 therein, while the op 3c the following claims. posite ear 3 has secured to it an upright pin Figure 1 is a front elevation, partly broken or short stud 3, the object of the two cars beout and in section, of a molding apparatus ing to accurately position the drag-flask durembodying one form of my invention, the ing the construction of the drag, said flask patterns being shown in operative position having ears atits ends, one of which has a hole 3 5 relative to the stripper-plate. Fig. 2 is a top to receive the pin 3 and the other being proor plan View thereof, the stripper plate and a vided with a pin or stud to enter the hole 2, portion of the frame being broken out and it being understood that when the apparatus one of the patterns being omitted; and Fig. 3 is to be used the pattern or patterns will be is a vertical longitudinal section of a pattern moved into operative position relative to the 0 40 and the means for controlling the longitudistripper-plate, as shown in Figs. 1 and 2, and nal movement thereof, the pattern carrier the drag-flask will then be placed upon the being shown in elevation. stripper-plate and filled with molding-sand In the present embodiment of my invention and rammed, all in usual manner, before the I have shown an apparatus for molding artipattern or patterns will be withdrawn. The 9 5 5 cles having an external spiral threadsuch, stripper-plate is provided with circular openfor instance, as a worm-it being manifest ings s (see Fig. 1,) one for each pattern, and.

that in order to draw the pattern of such located above and concentric with one of the an article from the mold the pattern must be vertical bearings g, hereinbefore referred to.

given a compound movement, the resultant I have herein shown the apparatus as protoo 50 of a rotative movement and a longitudinal vided with a plurality of like patterns for movement, the latter corresponding with the making molds for worms, each pattern comterns are precisely alike the description of one will suffice for all, and, referring to Fig. 2, it will be noted that the end of the spiral thread nearest the extensionp turns into and merges with the cylindrical barrel, as at 19 the other end of the thread being continued to the point 19 (see Fig. 1,) and shown by breaking out the stripper-plate, and it will also be noticed by reference to this figure that the lower end of the thread enters the pattern-opening s in the stripper-plate when the pattern is in its operative position.

The barrel of each pattern P is made hollow, as shown in Fig. 3, and the extension 19' has a socket p therein to receive and form a seat for the upper end of the pattern-carrier 0, herein shown as a long spindle or shaft extended through the bearing 9 of the guide plate G and below the said plate into a second bearing a on the base-plate A, the latter having an aperture, as a, for each of the bosses, through which the corresponding pattern-carrier may be moved. longitudinally in the operation of the apparatus. A suitable pin 5, adapted to be driven into the upper end of the pattern-carrier through a hole in the extension p, serves to firmly secure the pattern to the carrier. Each carrier has rigidly secured thereto and below the guideplate the hub b of a gear or sprocket-wheel b a set-screw G holding the hub securely in place, and the upper face of the sprocketwheel or gear is provided with an elongated sleeve-like extension or shaft b, which surrounds with an easy fit an elongated nut N, in the present embodiment of my invention shown as fixedly mounted upon the under side of the guide-plate G by means of suitable screws 7, extended into said plate through an annular flange n at the upper end of the nut,

which latter is spirally threaded, the pitch and length of the spiral corresponding to the spiral thread of the pattern, and I have herein shown what I have termed a master-thread M as secured to or forming'a part of such carrier and in operative engagement with the nut, so that rotative movement of the carrier will by or through the cooperation of the master-thread and nut efiect a longitudinal movement of the carrier in exact correspondence with the pitch of the thread of the pattern, so that the pattern will be given a compound rotative and longitudinal movement to unscrew it, as it were, from the mold when the latter is completed.

The bearings 9 enter the hollow barrels p of the patters Pas the latter are moved downward in the operation of drawing, and they act to steady each pattern after a portion of it has been drawn from the sand, and it will be manifest that the longitudinal movement of the pattern need only be sufficient to entirely withdraw the spiral portion thereof from the spiral portion in the mold.

The pattern-openings 8X in the stripperplate are counterbored, as at s, Fig. 1, to receive a filling-ring made for convenience in three parts f f f the segments ff when in position leaving an opening 10 of a shape corresponding to the leading end of the patternspiral, and through which the spiral travels when the pattern is moved into and out of operative position. The third segmentf has an inclined topf corresponding to the slope of the pattern-spiral, and presents a substan-,

tially wedge-shaped stopping-off piece or filler, which in Fig. 1 is indicated atf the object of this filler being to prevent the formation of a thin unsupported portion of sand in the mold adjacent the parting-face and running to a feather-edge.

By examining anyone of the three left-hand patterns in Fig. lit will be seen that the filler f forms practically a continuation of a portion of the pattern-spiral adjacent the top of the stripper-plate, and it will be manifest that if no such device were used the sand would form a thin wedge-shaped tongue running to a feather-edge, and itwould be impossible to prevent this tongue from breaking off either during the drawing of the pattern or thereafter, and to overcome this objectionable feature the filler is used to stop off the sand at a point where it will be sufficiently thick to support itself properly after the pattern has been drawn.

Usually the cope, which may be made on an ordinary fiat-back,'will have a projec tion to fit into the recess in the mold formed by the use of the stopping piece or filler, thus completing the mold, the term fiat;back meaning, technically speaking, a fiat plate with such portions of a pattern rigidly secured thereto as can be readily drawn from the mold.

I have herein provided actuating means for imparting rotative movement to the patterncarriers, the actuating means being so con structed and arranged that the longitudinal movement of the pattern-carriers is accon1- panied by a similar movement of the actuating means.

The base-plate A has erected upon it at its left-hand end an upright stand D, the base thereof having lateral feet d, through which are extended the shanks of suitable bolts cl said shanks passing through longitudinal slots (1 (see Fig. 1) in the base-plate A and being held in adjusted position by means of set-nuts a to securely clamp the stand D in adjusted position, a ready adjustment being effected by means of an adj usting-screw 01, mounted in an ear a on the base-plate A and bearing against the base of the stand D, so that by slackening up the nuts a and turn ing the adj Listing-screw cl in one direction or the other the position of the stand may be changed relative to the main framework of the apparatus on which the pattern apparatus is mounted.

An upright shaft D is rotatably mounted in a bearing d on the top of the stand, and at its lower end the said shaft passes through a hole in the base of the stand and in the baseplate A, said shaft having secured to it a sprocket-wheel or gear (1 provided with an upturned sleeve-like shield (1 which latter receives with a sliding fit a downturned externally-cylindrical nut (Z secured atits upper end to the top of the stand D, this out being interiorly threaded to cooperate with a master-thread d, secured to the shaft D I have not deemed it necessary to illustrate this structure in detail, as the sprocket-wheel, shield nut, and cooperating master-thread for the shaft D of the actuator are all like similar parts hereinbefore described in detail as effecting the longitudinal movement of a carrier, the sprocket-wheel d of the actuator being connected by an endless sprocket-chain 50 with the sprocket-wheels b of the patterncarriers, as clearly shown in Fig, 2.

The shaft D is provided with an operatinghandle D and manifestly by rotating the shaft the sprocket-chain will impart simultaneous rotation to the pattern-carriers, and as the latter are moved longitudinally by means hereinbefore described the actuator-shaft D will be moved longitudinally in unison therewith, so that the chain is moved up or down, according to the direction of longitudinal movement of the carriers, without any twisting or kinking, and inasmuch as every carrier is like its fellows they will be moved in absolute unison and all of the patterns will be accurately and simultaneously drawn from the mold, or if the actuator is rotated in the opposite direction, supposing the patterns to be in their inoperative position, then the said patterns will be simultaneously moved into operation position shown in the drawings.

The function of the sleeve-like shield b is to protect the mfiSt8T-tl1T6tCl from injury by the entrance of sand or dirt, and a like function is fulfilled by the shield (Z' of the actuator, the upper ends of the shields still embracing the nuts when the patterns are in the position which they will assume when fully drawn from the mold.

In order to insure the correct engagement of the sprocket chain with the sprocketwheels or gears of the carriers and to guide the said chain, I have herein shown idlerdrums I I, rotatably mounted on suitable upright studs 7t 71:", secured to the base-plate A, the chain being maintained properly taut by adjustment of the stand D, hereinbefore described.

While I have shown a multiple-pattern apparatus herein adapted for the formation of a number of molds at one time in the drag, it will be manifest that the apparatus is equally well adapted for single-pattern work, if desired, as the operation is the same whether one pattern or a plurality of patterns be used.

By using different segment-pieces in the pattern apertures s of the stripper-plate the apparatus can be used for patterns of different diameters, the segmental ring formed by the members fff acting to support the sand at the parting-face when the pattern is withdrawn, the inner edge of the opening formed by such segmental ring being closely adjacent the external circumference of the pattern.

The bearings f not only serve to laterally support the pattern-carriers and to provide long bearings therefor, but they also, in connection with the guide-plate G, aid in protecting the master-threads from the entrance of sand or dirt.

Various changes or modifications may be made in the apparatus herein shown and described without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a molding apparatus, a fixed stripperplate, a cooperating spirally-threaded pattern, a rotatable and longitudinally-movable carrier therefor having a master-thread of the same pitch, a fixed nut cooperating with the master-thread, fixed bearings located above and below the master-thread and nut, and independent of the stripper-plate to support the carrier laterally and permit longitudinal movement thereof at right angles to the stripper-plate, and means to rotate the carrier, said means including a gear fast on the carrier,co6peration of the master-thread and nut effecting longitudinal movement of the carrier simultaneously with its rotative movement, to thereby draw the pattern.

2. In a molding apparatus, a fixed stripperplate, a cooperating spirally-threaded hollow pattern, a rotatable and longitudinally-movable carrier therefor, a fixed tubular bearing for the carrier, to enter and steady the pattern when drawn, a master-thread and a cooperating nut, one being fixedly mounted independent of the stripper-plate, and the other attached to the carrier, to effect longitudinal movement of the latter when rotated, and means to rotate the carrier.

3. In a molding apparatus, a fixed stripperplate, a plurality of like cooperating spirallythreaded hollow patterns, a carrier for each pattern, fixed bearin gs through which the carriers move and which enter and guide the patterns when drawn, and means to rotate in unison the said carriers and simultaneously move them and their attached patterns lon gitudinally in correspondence with the pitch of the pattern-threads, to thereby draw the patterns.

4. In a molding apparatus, a fixed stripperplate, having a plurality of openings therein, a plurality of like spirally-threaded patterns freely movable through said openings, a rotatable and longitudinally-movable carrier for and to which each pattern is secured, a fixed guide-plate having on its upper face tubular bearings through which the carriers freely move, a master-thread on each carrier of the pitch of the pattern-thread, a fixed nut depending from and secured to the guideplate to cooperate with each master-thread, and means to rotate in unison the carriers, and to move longitudinally with them, longitudinal movement of said carriers being simultaneously effected by the master-threads and nuts, to draw the patterns.

5. In a molding apparatus, a fixed stripperplate, a plurality of like, spirally-threaded patterns to cooperate therewith, a rotatable and longitudinally-movable carrier for each pattern, two fixed bearings for each carrier, one near the pattern, and the other at or near the lower end of the carrier, a master-thread and a cooperating nut for each carrier, one being attached to the carrier and the other fixed, to efiect longitudinal movement of the several carriers when rotated, said masterthread and nut being located between the bearings for each carrier, and means to rotate the carriers in unison, said means including a gear fast on each carrier, and a common actuating device in engagement with the several gears.

6. In a molding apparatus, a fixed stripperplate,a cooperating spirally-threaded pattern,

a rotatable carrier therefor movable at right angles to the stripper-plate and having an attached sprocket-wheel, a master-thread on the carrier, having the pitch of the patternthread, a cooperating fixed nut, a rotatable actuator having an attached sprocket-wheel, a sprocket-chain connecting said sprocketwheels, and means to move the actuator 1ongitudinally in unison with the carrier, whereby rotation of the actuator will operate the carrier to draw the pattern.

7. In a molding apparatus, a fixed stripperplate, a plurality of rotatable carriers mov able at right angles to the stripper-plate and each having an attached sprocket-wheel, a spirally-threaded pattern mounted on each carrier, means to move said carriers longitudinally in correspondence with the pitch of the pattern-threads when rotated, a rotatable and longitudinally-movable actuator having an attached sprocket-wheel, and an endless sprocket-chain connecting said sprocketwheel with the sprocket-wheels of the several carriers, whereby rotation of the actuator imparts rotation to the carriers, to draw the patterns, the longitudinal movement of the actuator corresponding to thelongitudinal movement of the carriers.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES M. DAY.

\Vitnesses:

GEORGE Orrs DRAPER, ERNEST W, W001).

Images