US2515216A - Means for centering and clamping a flask in position in centrifugal casting machines - Google Patents

Means for centering and clamping a flask in position in centrifugal casting machines Download PDF

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Publication number
US2515216A
US2515216A US750204A US75020447A US2515216A US 2515216 A US2515216 A US 2515216A US 750204 A US750204 A US 750204A US 75020447 A US75020447 A US 75020447A US 2515216 A US2515216 A US 2515216A
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United States
Prior art keywords
flask
jaw
clamping
machine
centrifugal casting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US750204A
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English (en)
Inventor
John D Guelph
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A R D Corp
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A R D CORP
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Filing date
Publication date
Priority to BE482608D priority Critical patent/BE482608A/xx
Application filed by A R D CORP filed Critical A R D CORP
Priority to US750204A priority patent/US2515216A/en
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Publication of US2515216A publication Critical patent/US2515216A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • B22D13/026—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/19—Radially reciprocating jaws
    • Y10T279/1913—Transverse-screw actuated
    • Y10T279/1921—Annular rack

Definitions

  • This invention relates to centrifugal casting machines. More particularly, it relates to means for centering and clamping a flask in position on therotating table of a centrifugal casting machine.
  • IAn object of this invention is to provide a new and improved centrifugal casting machine
  • Another object of this invention is to provide a centrifugal casting machine with means for easily, quickly and automatically centering the flask on the table and clamping it in position.
  • vAn additional object of this invention is to provide a centrifugal casting machine having centering and rclamping ymeans automatically adaptable to different flask diameters.
  • a further object of this invention is to provide a centrifugal casting machine wherein the centrifugal force developed in the elements of the flask-clamping-means rigidly clamps and holds the flask during the casting operation.
  • the objects of the invention are obtained, in general, by mounting a plurality of spaced flaskclamping jaws arranged equidistantly from the center axis of the machine for movement in a ⁇ radial path to and from the center axis ofzthe machine and providing means forl simultaneously moving said yjaws in the desired direction in said radial paths vwhereby a flask disposed ⁇ therebetween is centered and gripped or released depending on the direction of movement of the jaws. Means are also provided ⁇ to utilize the centrifugal force developed during rotation of the machine during thecasting operation to securely clamp and hold the ask in position.
  • each jaw iscarried on a separatey jaw holder, and each jaw holder is slidably mounted on'a separate screw shaftfwhich, upon rotation, will cause the jaw holder thereon to move in a radial path to and from the center axis of the machine depending onthe direction of rotation of the screw shaft.
  • Each screw shaft is provided at its inner end with a bevel gear which, in turn, is inmeshing relationship with a main bevel gear.
  • ⁇ Means are provided to rotate the main bevel gear lin the desired direction whereby the jaws will be moved simultaneously inwardly toward or outwardly from the center axis of the machine.
  • the means for rotating the main gear is provided with means which utilize the centrifugal force developed during vrotation of the machine so as to transmit the torque so developed to the main gear where- 56 by the jaws will exert a clamping effect on the flask disposed therebetween during the casting operation.
  • Figure 1 is a vertical section of a machine -embodying the principles of this invention
  • Figure 2 is a section taken on the line 2 2 of Figure l
  • Figure 3 is a section taken on the line 3-3 of Figure 1.
  • the reference numeral I0 designates a turn-table which is secured in any convenient manner, as by screws I2, to a ange I4 of a rotatable spindle I6.
  • the spindle I6 is rotated about its center axis in any well-known manner, and since the details of construction of the spindle and the drive therefor form no part of this invention, further description thereof is deemed unnecessary.
  • a flask 20 containing the mold and into which the molten metal is to be ladeled is adapted to be positioned on a flask rest pad 22 on a jaw-supporting table 24 which is secured rigidly on spaced brackets 2B which, in turn, are secured rigidly to the table Ill.
  • the flask 20 is adapted to be centered and gripped between or released from three jaw plates 30 arranged in spaced relationship to each other and equidistantly from the center axis of the machine. Since all of the jaw plates 30 are identically mounted and operated, the details of the mounting and operation of only one of such jaw plates will be described.
  • Each jaw plate 3U is secured to a jaw holder 3.2 in any convenient manner, as by screws 34, and each jaw holder 32 is providedwith a threaded hole through which a screw shaft 35 extends.
  • Each jaw holder v32 is provided with extensions 40 which are adapted to slide in-a slot 42 in vthe jaw-supporting table 24.
  • Each slot 42 extends in a radial direction relative to the center axis of themachina l y
  • Each screw shaft 36 is rotatably mounted in bushings 44 and 46. The bushing 44 issecured in a support 48 depending from the jaw table 24 and the bushing 4G is carried ina support 50 secured to the table I 0 in any convenient-manner.
  • a cap 54 is pinned to the outer end of each screw shaft 36, and on its inner end each screw shaft 36 is provided with a bevel gear 56 in mesh with a main bevel gear 58 rotatably mounted on a post 66.
  • the center axis of the post 6D is located in the center 'a'xi'sfof the machine and issecured at the bottom thereof to the turn-table I6 and at the top thereof to the jaw-supporting table 2,4.
  • a radial bearing 62 and a thrust bearing 66 are provided between the main bevel gear 58 and the post 60.
  • main gear 58 is in mesh with and rotated by a bevel gear 66 secured to the inner end of a shaft 6B rotatably mounted in bushings l! in the brackets 26.
  • shaft 68 is provided with a gear 'l2 which is in mesh with a bevel gear 14 secured to a shaft 16 rotatably mounted in a bushing ,f8 carried by the j aw-supporting table 24.
  • a ratchet 80 is appropriately secured to the shaft 'i6 and a locking weight member 82 is jour naled on" the ratchet 86.
  • the locking weight member 82 is provided with a hole through which the shaft i6 extends and also with a bore in which a plunger 84 is disposed. It is to be noted that the locking weight member is eccentrically mounted on the shaft i6.
  • the plunger 84 is provided with a tooth 86 which is adapted to engage one of the grooves 88 of the'ratchet 80.
  • the plunger 64 is continuously urged into locking position with the ratchet 86 by a compression spring 86.
  • the plunger On its outer end, the plunger is provided with a lrnurled knob 92. A pin 94 secured to the knob 62 extends into at hole in the member 82 when the plunger is invlocking position.
  • Each of the jaw holders 32 has secured thereu to a jaw frontv cover l62 and a jaw back cover iM which are adapted to cover or close the slots in the j aw-supporting table 24.
  • the jaw front covers 562 are disposed beneath the flask rest pad 22 and the vertical legs thereof are positioned in grooves 63 whereby screws
  • a shield or housing l i6 is secured to both the turnftable i6 and jawsupporting table 24.
  • the flask 26 is disposed on the ask rest pad 22 and the operator grips the handle 98 and operates it so that the lever 66 is rotated in such a direction that the rotation of the gear 66 will impart rotation to the main bevel gear 58 in a direction so as to rotate the gears 56 on the screw shafts 36 in a direction whereby the jaw holders 32 will be moved on their respective screw shafts in their radial path toward the center of the machine and until they center and grip the flask.
  • the lockingweight member 82 may be atfany positionY relative to; the table.
  • the spindle i6 is then rotated at a definite speed, and the molten metal ladled into the upper end of the flask. After the metal has solidified, the table is brought to rest, the lever 96 is operated so as to movethe jaws into flask-releasing position, and the flask removed. The cycle of operations is repeated for each casting.
  • the invention provides a lcentrifugal casting machine which quickly centers the flask and clamps it in position and utilizes the centrifugal force developed during the operation of the machine to rigidly clamp and hold the flask in position during the clamping operation.
  • the clamping force for positively holding the flask in posi'- tion is therefore automatically applied ⁇ and released by the rotary motion of the table. Consequently, the operator isrelieved of the time and manual effort ordinarily required for this purpose and a higher production rate is achieved with less physical effort.
  • the mechanism of this invention is automatically adaptable to different flask diameters, no time is consumed for the adjustment of either the positioning'or clamping means, ⁇ irrespective of the diameters of the flasks successively used in the machine, and a higher production rate is obtained.
  • the higher production rate results 'in a considerably lower unit cost for the product.
  • a turn# table means to rotate said turn-table, a jawsupporting table secured to said turn-table, a plurality of spaced jaws arranged equidistantly from the center axis of the machine, each jaw being adapted to slide radially in said jaw-supporting table relative to the center axis of said machine whereby a flask disposed between said jaws will be centered and gripped thereby or released therefrom, each jaw being movably mounted on a separate screw shaft, a gear on each screw shaft, la main gear meshing simultaneously with said screw shaft gears to actuate the jaws in unison, a drive shaft extending axially of said turn-table and positioned eccentrically thereof, means gearing said drive shaft to drive said screw shafts, a weight member rotatably mounted on said drive shaft and positioned eccentrically thereon so that during rotation of said turn-table a centrifugal force will be developed thereby, and a releasable connection connecting said Weight
  • a turntable means to rotate said turn-table, a jawsupporting table secured to said turn-table, a plurality of spaced jaws arranged equidistantly from the center axis of the machine, each jaw being adapted to slide radiallj7 in said jaw-supporting table relative to the center axis of said machine whereby a flask disposed between said jaws will be Icentered and gripped thereby or released therefrom, each jaw being movably mounted on a separate screw shaft, a gear on each screw shaft, a main gear meshing simultaneously with said screw shaft gears to actuate the jaws in unison, a drive shaft extending axially of said turntable and positioned eccentrically thereof, means gearing said drive shaft to drive said screw shafts, a weight member rotatably mounted on said drive shaft :and positioned eccentrically thereon so that during rotation of said turn-table a .centrifugal force will be developed thereby, a ratchet secured

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
US750204A 1947-05-24 1947-05-24 Means for centering and clamping a flask in position in centrifugal casting machines Expired - Lifetime US2515216A (en)

Priority Applications (2)

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BE482608D BE482608A (en)) 1947-05-24
US750204A US2515216A (en) 1947-05-24 1947-05-24 Means for centering and clamping a flask in position in centrifugal casting machines

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US750204A US2515216A (en) 1947-05-24 1947-05-24 Means for centering and clamping a flask in position in centrifugal casting machines

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US2515216A true US2515216A (en) 1950-07-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752650A (en) * 1954-05-11 1956-07-03 Jelenko & Co Inc J F Centrifugal casting machine
US3166595A (en) * 1961-03-28 1965-01-19 Jack W Frazer N, n-difluoroalkylamines
US3233910A (en) * 1963-05-14 1966-02-08 Lloyd A Pfaff Welding work centering chuck
US5398898A (en) * 1993-11-01 1995-03-21 Bever; Damon S. Holding device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1501338A (en) * 1923-10-09 1924-07-15 Augustus M Henry Rotary casting
US1517579A (en) * 1922-03-09 1924-12-02 William H Pashley Casting machine
US1691464A (en) * 1926-08-11 1928-11-13 Brown David & Sons Ltd Centrifugal machine for casting metal
US1713803A (en) * 1926-11-15 1929-05-21 Lucius E Whiton Lathe chuck
US1846482A (en) * 1927-12-19 1932-02-23 Bohn Aluminium & Brass Corp Babbitting machine
US1917872A (en) * 1931-11-09 1933-07-11 Campbell Wyant & Cannon Co Centrifugal casting machine
US2207621A (en) * 1938-09-22 1940-07-09 Lewis J Musser Centrifugal chuck
US2361906A (en) * 1940-07-29 1944-11-07 Fairbanks Morse & Co Centrifugal apparatus
US2385631A (en) * 1943-01-29 1945-09-25 Benjamin L Levinson Centrifugal casting apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517579A (en) * 1922-03-09 1924-12-02 William H Pashley Casting machine
US1501338A (en) * 1923-10-09 1924-07-15 Augustus M Henry Rotary casting
US1691464A (en) * 1926-08-11 1928-11-13 Brown David & Sons Ltd Centrifugal machine for casting metal
US1713803A (en) * 1926-11-15 1929-05-21 Lucius E Whiton Lathe chuck
US1846482A (en) * 1927-12-19 1932-02-23 Bohn Aluminium & Brass Corp Babbitting machine
US1917872A (en) * 1931-11-09 1933-07-11 Campbell Wyant & Cannon Co Centrifugal casting machine
US2207621A (en) * 1938-09-22 1940-07-09 Lewis J Musser Centrifugal chuck
US2361906A (en) * 1940-07-29 1944-11-07 Fairbanks Morse & Co Centrifugal apparatus
US2385631A (en) * 1943-01-29 1945-09-25 Benjamin L Levinson Centrifugal casting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752650A (en) * 1954-05-11 1956-07-03 Jelenko & Co Inc J F Centrifugal casting machine
US3166595A (en) * 1961-03-28 1965-01-19 Jack W Frazer N, n-difluoroalkylamines
US3233910A (en) * 1963-05-14 1966-02-08 Lloyd A Pfaff Welding work centering chuck
US5398898A (en) * 1993-11-01 1995-03-21 Bever; Damon S. Holding device

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BE482608A (en))

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