US1858478A - Process of casting metal centrifugally - Google Patents

Process of casting metal centrifugally Download PDF

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Publication number
US1858478A
US1858478A US317817A US31781728A US1858478A US 1858478 A US1858478 A US 1858478A US 317817 A US317817 A US 317817A US 31781728 A US31781728 A US 31781728A US 1858478 A US1858478 A US 1858478A
Authority
US
United States
Prior art keywords
mold
metal
stream
casting
trough
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
Application number
US317817A
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English (en)
Inventor
Frank G Carrington
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.)
FERRIC ENGINEERING Co
Original Assignee
FERRIC ENGINEERING Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to BE363994D priority Critical patent/BE363994A/xx
Priority to NL29137D priority patent/NL29137C/xx
Application filed by FERRIC ENGINEERING Co filed Critical FERRIC ENGINEERING Co
Priority to US317817A priority patent/US1858478A/en
Priority to GB28092/29A priority patent/GB339017A/en
Priority to FR682204D priority patent/FR682204A/fr
Priority to DEF69336D priority patent/DE557682C/de
Priority to US552898A priority patent/US1858292A/en
Application granted granted Critical
Publication of US1858478A publication Critical patent/US1858478A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B22D13/107—Means for feeding molten metal

Definitions

  • This invention relates to centrifugal casting, and more particularly has reference to the deposition of molten metal in a rotating mold.
  • the metal is subjected to various forces.
  • the first is the force impelling it along the trough.
  • This is partially compensated for by the relative movement of the mold and trough.
  • the trough remains stationary while the mold traverses it, but even if-the trough moves while the mold remains axially stationary, this relative move ment takes up a large part of the velocity of the stream.
  • a second force to which the metal'is subjected results from the rotation of the metal when it is caught up by the spinning mold.
  • a third force is the centrifugal force set up in the metal by the rotation of the mold and its contents.
  • the longitudinal flow of the metal be neutralized as quickly as possible to revent a continued flow down the mold.
  • his neutralization is effected not only by the relative longitudinal movement of the mold and trough but by the centrifugal force which causes the metal to spread out and partially reverse its direction of flow.
  • the speed at which the mold is required to revolve in order to spread the metal is so great, however, that there'is a strong tendency toward surging and splashing. This tendency is aggravated by the fact that the metal is usually poured from the discharge end of the trough in a ribbon whose longer dimension is transverse to the axis of the mold.
  • the surges make for a pipe of non-uniform thickness, as there is apt to be a solidification of the cast metal before it has been distributed unlformly about the mold.
  • any splashing means that the metal within a given area is not contemporaneously cooled. For instance, those drops that splash upon a sect on which has not yet received the metal solidlfy prior to solidification of the stream which is subsequently poured upon that section. Consequently these drops do not fuse 1nto the body of the pipe when it is cast over them, and produce defects in the finished article, commonly called splashes.
  • Figure 1 is a diagrammatic showing of a pipe mold, trough and associated mechamsm.
  • Figure 2 is a longitudinal sectional View of a mold and a top plan view of the discharge end of a trough and spout mounted therein.
  • Figure 3 is a View along the line 3-3 of Figure 2, looking in the direction of the arrows.
  • Figure 4 is a sectional view along the hue 4- 4 of Figure 2 looking in the direction of the arrows.
  • Figure 5 is a sectional view along e hne 55 of Figure 4 looking in the d1rect1 n of the arrows.
  • Figure 6 is a view similar to Figure 4, with the exception of showing metal in the process of POIIIlIlg and the formation of a casting within the mold.
  • Figure 7 is an end view of the spout during a casting operation, showing the metal being poured therefrom.
  • FIG. 1 there is set forth a conventional type of mold 1, rotatably mounted in a mo carriage 1', which latter is supported b suitable rollers 2.
  • the mold is rotate by a motor 3 or other driving means'actuating the mold through a train of gears 4.
  • the rollers 2 run upon a track 5, mounted at an angle to the horizontal as indicated by the line 6.
  • a muscularte means (not shown) are provided or moving the mold on the track 5.
  • a ladle 7, which may be of any type mounted upon a support 8.
  • Oantilevered upon the support 8 is an end pouringltrough 9.
  • a chute 11 fits within the troug 9 adapted to receive the metal from the ladle 7 and convey it to the channel of the trough 9.
  • the carriage 1' begins to move down the inclined track 5. During this movement of the carriage, the metal builds u on the interior of the mold in helical lammations, the adjacent laminations coalescing as the casting proceeds.
  • the trough 9 is composed of a casing high melting point, preferably annealed, or other suitable refracto material, in the channel of which there 1s inserted a lining one of the steels having a r 14.
  • This lining is preferably cast iron, but it may be made up of one'o the steels just mentioned, fire 'cla or some other appropriate refractory. 14 is fairly wide, which facilitates the cleaning and removal of any metal that may remain after a casting operation.
  • a spout 15 Joined to the discharge end of the trough i by any suitable means to provide a liquidtight connection.
  • the composition of this spout may be cast iron, a high melting point'steel, or a refractory'such as fire clay. Referring to Figure 4, it will be observed that the bottom of the spout is flush with the bottom of the casing 13, (although this may be inclined), and that a portion 16 of the spout extends within the casing 13 and forms in effect a lining for that portion of the casing so occupied, and affords additional support.-
  • the channel of the section '16- is the same as the channel of the lining 14 as indicated at 17.
  • the slot 19 flares towards its open end, but, under suitable conditions, its sides .may be parallel.
  • the sides of the channel converge as at 21 for a distance, and then,
  • the metal begins to fall perceptibly toward the mold the moment that it reaches the discharge and of the sloping portion 18, which is the slot 19, but by reason of its depth the'upper strata of the stream are delayed in their drop toward the mold, the
  • the metal would have a tendency to fallfrom the end of the spout in substantially a sheet that would be perpendicular to the longitudinal axis of the mold.
  • the metal is poured in the form of a ribbon that is parallel with the longitudinal axis, and consequently prevents the surge which would naturally result from the1 gotation of the metal when it strikes the mo Figures 6 and 7 show the form assumed by the metal as it leaves the spout.
  • the stream is constricted in width at the moment it falls through the slot 19 of the spout, and may be considered as formed of laminations 24.
  • These laminations 24 readily assume the altered shape produced by rotation of the metal, and easily take the form of the tubular mass of metal 26. Consequently any tendency of the metal to surge or splash is reduced to a minimum.
  • the mass 26 tapers as at 27 toward a point on the mold in the rear of the slot 19. This tapering portion is gradually built up as the mold moves along the track 5 until it is uniform with the rest of the casting. The result is that'the cast pipe is free from splashes or solidified surges It is believed that'the operationof myinvention may be readily comprehended-from the foregoing description.
  • Metal is deposited in the liner 14 and flows through it to the spout 15.
  • the spout-the stream is con-- verged by the walls 21, and increased in depth by virtue of the decline in the base of thechannel 18 and the restriction in width.
  • the throat 23 narrows the stream to the desired maximum.
  • the velocity is reduced to approach the rate of speed at which the carriage 1' travels. This tends to neutralize the force set up by the longitudinal movement of the carriage.
  • the metal falls upon the mold in rather a ribbon formation, which readily adjusts itself to the rotation with the mold after its longitudinal flow in the trough.
  • the result is that the stream of metal impinges upon the mold in a form that is best adapted to assume its new shape. This reuces surging and splashing of the metal to a minimum, and obviates the deleterious effects that have attended the prior processes and apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
US317817A 1928-11-07 1928-11-07 Process of casting metal centrifugally Expired - Lifetime US1858478A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE363994D BE363994A (es) 1928-11-07
NL29137D NL29137C (es) 1928-11-07
US317817A US1858478A (en) 1928-11-07 1928-11-07 Process of casting metal centrifugally
GB28092/29A GB339017A (en) 1928-11-07 1929-09-16 Pouring trough for centrifugal metal-casting apparatus
FR682204D FR682204A (fr) 1928-11-07 1929-09-23 Bec de coulée pour appareil de moulage par centrifugation
DEF69336D DE557682C (de) 1928-11-07 1929-10-02 Verfahren und Vorrichtung zur Herstellung von Schleudergussrohren
US552898A US1858292A (en) 1928-11-07 1931-07-24 Pouring trough

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US317817A US1858478A (en) 1928-11-07 1928-11-07 Process of casting metal centrifugally

Publications (1)

Publication Number Publication Date
US1858478A true US1858478A (en) 1932-05-17

Family

ID=23235394

Family Applications (1)

Application Number Title Priority Date Filing Date
US317817A Expired - Lifetime US1858478A (en) 1928-11-07 1928-11-07 Process of casting metal centrifugally

Country Status (6)

Country Link
US (1) US1858478A (es)
BE (1) BE363994A (es)
DE (1) DE557682C (es)
FR (1) FR682204A (es)
GB (1) GB339017A (es)
NL (1) NL29137C (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648763A (en) * 1969-10-21 1972-03-14 Pont A Mousson Machine for centrifugally casting tubular metal bodies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648763A (en) * 1969-10-21 1972-03-14 Pont A Mousson Machine for centrifugally casting tubular metal bodies

Also Published As

Publication number Publication date
FR682204A (fr) 1930-05-24
GB339017A (en) 1930-12-04
BE363994A (es)
NL29137C (es)
DE557682C (de) 1932-08-26

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