US1544062A - Molding of spiral corrugated cast-iron pipe - Google Patents

Description

June 30, 1925. 1,544,062

D. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov. 10, 1924 4 Sheets-Sheet 1 WM$M my.

June 30, 1925. 1,544,062

. o. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov. 10, 1924 4 Sheets-Sheet 2 IIL'if June 30, 1925.

1544.062 D. B. DHVHCK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov. 10, 1924 4 Sheets-Sheet 5 June 30, 1925.

1,544,062 D. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov. 10, 1924 4 Sheets-Sheet 4 Sand, Bin 8( Conveyors.

Patented June 30, 1925.

UNITED sures DANIEL A eR'p IeK, OF armvn iermlyr, ALABAMA.

MOLDING OF SPI BAL CORRUGATED CAST-IRON ZPIBE.

An mat on fi o em er 9 45% fi el N meqes- Te al t gm it hey mncemi? B it kn wn tha De i J4me D Q e e t eh if h Un t Stete es eie at irmi ham, n h eiih y ef Je eieeh and S ate Alabama, h ve invented eih ne an useful lmprei ehiee e Male-- ng Qf p ral Gerr getee flee l ee Ihpe; end I do y'deelee f l qwihge he a f l, d ne-e xee eee riptien f t n e ti s ch es wil ena le etheee ehilled n the ap to which it eiipe teihe t mehe and u th Th meeent r htien relates s impe ements i apparatus fer ast ng p ee and e la es re pa cul ly to the pieeue en Qfi aml s spirelly e rmg ted y-l drieel p p of the kind sh wn he l described iii my ta-p nd ng applicatien e tled Ca Pip and joint therefor, filed September 16, 1922, Serial No, 588,659.

A p ou machin for v he asting ,Qf p pe of th s ha n-a l r is shewh e d ier scribed ina second copendi-ng application, Serial No. 588,649, filed September 165, 1922. According to this previous meeh ne t e helle pir l y c r gate p t rn, aft r orming the mold ,eavity, is itself simultaneously rotated and lifted axially of-the mold Where by to i hdn w he patt r fnem t eaYit-y- In accordance with the present invention the p t ern is simply l t a ially, hi held against rotation, during rotary moyeen ef he mold; nd e n eq eh le i s t purpose of h present in eh zQh i0 d seeuee with the mor comp ica ed me henism cluded in the previous machine for imposing a simultaneous rotary and axial movem upeh t patt r in fe e e a eih pl tied construction in which the pattern is made non-rotatable and .capable of xiai movement, the axial movement being accent plished ,hy the simple rotation oi the mold aided by counterweights and possibly by the hand of the operator.

A further .objeet of the present invention is to provide for the efficient ionndry hendli ng ot the patterns and molds an i so grouping units of the mechanism es-to econ; omize 0, 1 QQI' space in the foundry and upon the number of operators required to attend a given number of the machines.

W ith the foregoing and other ohjeqts in View, the invention will be more fully described hereinafter, and will be lQlB par-i ticulerly eoihte l, .ei t i the el -m app nded henete; 1

In e draw n he e n ik mhe fer h l k .1" i'eeeehiiih P tth ut h s ver l i ws F re 1 e 74 de ele a n, t Pei-1 in section of the improved machine.

- Fi u 2 is .e v r l sec i n taken thr u h h m ch ne e ewi e' th patter and et parts in a subsequent position. i

i h i e ee plan ew hf ih eh n F eh e 4: s a tien taken e t line in F gure 2 h h m wu g ewe he s de, and i ll? 5 4 di gremmetie ew she-Wi e g upin of ma in 'the ohhde y floor. r

Re e r n f th Prese t the F u s 1 t 4 inclusive 6 designates the cylindrical, hole Lo spi a y p me te pehernemeeended lew th e t end of th arm 7 Whie i pe mitt d to s ide verti a ly pen the Pest hut pr v nt d fro rht ti 'reletive e h pe t by reeeeh 9 the enga emen 9f the key 9 in the ertical groove 1Q'pf e tire post. he pest, ewe e is it e f e t wh ehe b su tantia y er al eXi ee the his purpeee i is me h ed n the eylieiil ie p deete .11 he ihg he P rfere ee engee a it he by whi it is ei eh e e th base pl e or bed 12*, the heeeph e ei i urn belied e eth ri i e efl ii t9 h eeor pilnd i ci h Ahti-ih etieh heei e lie are nt rp ed hehee h th w r nd 9 th pest ,8- .te e erd easy retetien he by the held of h 0P. QI- he him 7 t ms w lei'e y Wh eh th poe n patterh m y whngi hres and e a e eemph etiye ews h w me th We ee iiiehe' ef the erm- Whe t eett rn hi the eee eh e r th m l plug pi w re? ns rted hrehgh h p de tal eha ihhe e ee et i he met te he di he eerie .eee e e iei h e net h- A due h l 14.6 is med he the m i et ehe-Ye the ee e hsl i th ped sta to exe he te ieh ii-ether from the hearings. t The arm 7 is preferably counterhelaneed he a d in the ve ti al I.eev.emeht, es th wh n its rel she nd l tt re th s ph pee em 7 is el i e e th wee; nd th pe t- Fr m h eepxh iid e ai re t ward m 8 end 2 eeir of ms -9 h ea eeri -Wi p l ye where 2 and '2 F9111 Ie ieh pi l ye e .e wh e Fig r 3., th irez t pull ye ei g ie w th the eeer-eell ye see as 9 the the t lee 12 we pled to the arm 7 and toeye bolts 24 sus; tainingthe counter Weight 25.-

The cables may be wrapped one or more times about the pulleys. found best to simply have the cables play up and over the front pulleys and to be wrapped once about the rear pulleys. The counter balance weights 25 may be added to or reduced.

"As shown in Figure 1 an endless hand cable or strap '26 extends down from a wheel 27 mounted upon the shaft 28 upon the cap plate. This shaft carries a pinion 29 meshing with a gear wheel 30 on the rear pulley shaft 31. By drawing upon either run of the cable 26' the operator may aid the vertical movement of the pattern.

The outer end of the arm carries an integral or attached ring 32 adapted'to receive the ring 33 of the coupling head 34, bolts or other fastenings 35 being employed to detachably hold the rings together. The drawing head is provided with external and internal spaced flanges 36 and 37 to receive the upper ring 38 of the pattern 6. Pins 39 passing through the flanges 38 and 37 and the ring 38 are used to suspend the pattern from the head. This arrangement provides for flexibility in the pattern 6 to enable the pattern to accommodate itself to the mold and to the cavityjin screwing out of the mold.

As shown in Figure 1 the pattern 6 is adapted initially to fit down within the mold composed of the cheek 40 and the core arbor41. Both the cheek and arbor are pinned or otherwise affixed to the casting stool 42 as indicated respectively at 43 and 44. The mold parts are thus preserved in proper spaced relation and at the same time caused to turn with the casting stool 42. The casting stool 6 rests upon the turn table 44 to which it is secured as by the 'pins 45.

The pattern 6, when in the mold, as appears'in Figure 1 fits substantially midway between the cheek and the core and a sandslinger is employed to throw'sand upon both sides of the cylindrical pattern 6 making, in one molding operation a spiral, continuously cylindrical cavity46 in the sand having external and internal walls upon which the spiral corrugation is simultaneously formed, the corrugations upon the inner Wall being in lead with those upon the outer wall. Y p

The stripping plate is designated at 47 and I is made up iri'two half sections so that it maybe put in place upon the upper end of the check '40 after the sand has been introduced; The interior wall of the stripping plate is corrugated to conform to the externalcorrugations of the pattern 6 and to fit the outer'wall of the pattern snugly. This stripping plate is pinned-or clamped to the upper-end of "the cheek." Figure 2 shows the pattern withdrawn leaving the spiral cavity in the mold and the stripping plate in place upon the top of the cheek. In practice-it is The turn table 44 is mounted upon the shaft 48 having the upper tapered portion 49 fitting in the upper tapered bearing 50 provided with the removable cap plate or box 511 The lower portion of the shaft 48 fits within a cylindrical bearing 52 and upon anti-friction bearings 53 in the base thereof while a dust collar 54 is secured upon the shaft just above the lower cylindrical bearing 62. It is obvious that the turn table might be supported in any other manner appropriate to sustain the weight of the mold and other parts while permitting of free rotation thereof. I

1 An internal gear 55 is made upon the lower portion ofthe turn table 44. A pinion 56 meshes with the internal ear, the pinion being driven by the'electrlc motor 57 through an appropriate reduction gear 58 having the high speed shaft 59 and the lower speed shaft 601*Any other motor might be used and appropriate control means is connected to the motor.

The apparatus might, for purposes of understanding the diagrammatic illustration in Figure 5, be divided upinto two parts, one called the centeringmachine consisting of the rotatable post 8 and its supporting arm 7 by which the pattern'6 is brought to a correct position with respect to the empty flask, and the second machine is the turning machine or turn table 'consisting of the assembly for supporting and imparting to'the flask a rotary movementto effect removal of the pattern 6 from the sand In Figure 5 the centering machines are designated C. M. and it will be "seen that three of thesecenterin'gmachines are employed located in triangular "arrangement. Each centering machine serves two turn-fa bles drix en by the independent motors designated'at M'.

These turn tables are all located on'thc arc of a circlestruck from a center "where the sand-slinger is located so tllttt'tllt? sandslinger has a radius of activity covering all of the tables. *On'e sand-slingeryis therefore easily enabledto take care-of the six flasks upon the turn tables." The sand-bin and conveyors are also indicated in this dia grammatic viewat the open side of-the circle for supplying sand continuously to the sand-slinger." I

Vvhile the sand-s'linger 'is packing sai'ul" in a flask upon one turntable of each pair the centering machine is engaged in placing a pattern in the empty flask of the companion turn table 'so that the operation is substantially a continuous one and three centering machines and a single sand-'slinger are enabled to take care of six turn tables" After the flasks have been rammed and the patterns 6 removed, the flasks are withdrawn to the casting floor where the molten metal is poured in the spiral cavity.

In the use of the device a pattern 6 is coupled to the arm 7 and the column 8 is rotated until the pattern is centered above the empty flask upon one of the turn tables. The plug 15 is then inserted in order to prevent possible angular movement of the column 8 and the arm 7 is lowered until the pattern rests upon the casting stool.

The sand-slinger is then put into opcration and sand is rammed onto both sides of the pattern 6. Subsequently the turn able -14 is caused to rotate by closing the circuit of the electric motor 57 and inasmuch as the pattern 6 is held fast against rotation the stripping plate will act as a revolving nut tending to lift the pattern out of the sand.

This movement is made easy by the use of the counter weight and also if necessary by the aid of the operator who may pull down upon the counter weight or press up on the arm 7. This pressure should be light in order that the spiral wall in the sand be not distorted.

The pattern is then swung to the other turn table and inserted in the flask and sand is rammed in this flask while the finished flask is removed to the casting floor and an empty flask substituted in its place. The device and the assembly of these devices in the foundry are eflected with a view to simplicity in construction and a minimum number of the machines without sacrificing the capacity of the plant. The arrangement shown in Figure 5 makes it possible to operate the plant with considerably less labor.

It is obvious that various changes and modifications may be made in the details of construction and design of the above spe cifically described embodiment of this invention without departing from the spirit thereof. such changes and modifications being restricted only by the scope of the following claims.

What is claimed is 2- 1. An apparatus for casting pipe comprising a rotary turn table, means to rotate said turn table, a flask supported upon said turn table, and a spiral pattern held again rotation and supported for axial movement of the pattern.

2. An apparatus for casting pipe comprising a spirally corrugated pattern. means for supporting said pattern for substantially axial movement while holding said pattern against rotation. a flask for receiving said pattern and having spaces for sand both upon the exterior and interior of said spirally corrugated pattern. and means for sup porting and rotating said flask to cause withdrawal of the pattern,

3. An apparatus for casting pipe comprising a rotary turn table, means for rotating said turn table, a flask adapted to fit upon said turn table, means for causing rotation of the flask with the turn table, a spirally corrugated pattern adapted to fit within said flask, and means for holding said pattern against rotation while permitting it to enter and leave the flask in a substantially vertical direction.

4. An apparatus for casting pipe comprising a rotary column. an arm adapted to slide longitudinally on the column but held against relative rotation thereon. a spirally corrugated pattern carried fixedly by said arm, a flask for receiving said pattern. and means for rotating and supporting said flask.

5. An apparatus for casting pipe comprising a column, a support for mounting the column. for swinging movement, an arm slidable longitudinally on said column and turning with the column, counter weight means carried by said column and coupled to said arm, a spirally corrugated pattern held fixedly by said arm. a flask adapted to receive said pattern, and means for rotating and supporting said flask.

6. An apparatus for casting pipe comprising a pedestal. a column supported for rotary movement therein, an arm keyed for slidable movement up and down on said column but fixed against rotation thereon. a spirally corrugated pattern held fixedly on said arm, a counter weight suspended from said column and coupled to said arm. a flask for receiving said pattern. a turn table for fixedly receiving said flask. and a motor for driving said turn table.

7. An apparatus for casting pipe comprising a rotary column, an arm slidable on said column and fixed to rotate therewith. a spirally corrugated pattern held by said arm against axial turning movement. a cap upon said column having pulleys thereon. cables running over said pulleys and connected at one side to said arm, a counter weight connected at the other side to said cables. a flask for receiving said pattern and means for supporting and rotating said flask.

8. An apparatus for casting pipe comprising a rotary column.'an arm mounted for longitudinal movement on said column and secured to rotate therewith, a spirally corrugated pattern held fixedly on said arm. a. cap upon said column. pairs of spaced pulleys on said cap. pairs of cables trained over said pulleys, said cables at one side of the column being connected at spaced points to said arm, a counter weight at the other side of said column coupled at spaced points to the other ends of the cables, a flask for receivin said pattern, and rotary means for supporting said pattern.

9 An apparatus for casting pipe comprising a rotary column, means to hold the column against rotation, a counter weighted arm slidable on said column and rotating therewith, a spirally corrugated pattern supported fixedly from said arm, a flask for receiving said pattern, and a rotary turn table for fixedly supporting said flask.

10. An apparatus for casting pipe comprising a spirally corrugated pattern. means for supporting said pattern for axial movement while restricting the same against rotation, a flask for receiving said pattern. a turn table for supporting said flask having means for cooperating with the flask to cause rotation thereof with the turn table.

a motor for driving said turn table, and a reduction gear between said motor and turn table.

11. An apparatus for casting pipe comprising a turn table, a shaft for supporting 20 said turn table, bearings for said shaft, an internal gear upon the said turn table. a pinion meshing with said internal gear, a reduction gear coupled to said last mentioned gear, a motor for driving said first 25

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