US1845649A

US1845649A - Plate holder for molds

Info

Publication number: US1845649A
Application number: US443287A
Authority: US
Inventors: Edward M Chandler
Original assignee: Aluminum Company of America
Current assignee: Alcoa Corp
Priority date: 1930-04-11
Filing date: 1930-04-11
Publication date: 1932-02-16
Anticipated expiration: 1949-02-16

Description

Feb. 1 6, 1932. E. M. CHANDLER 1,845,649

' PLATE HOLDER FOR MOLDS Filed Aprilv 11. 1930 s sheets-Sheet 1 lu Il lfm lli Feb 16, 1932. E. M. CHANDLER 1,845,649

PLATE HOLDER FOR MOLDS Filed April 11. 195o :sshe'ets-sheet 2 Feb. 16, 1932. E. M. CHANDLER PLATE HOLDER FOR MoLDs Filed April 11. A19240 5 Sheets-Sheet 3 lilatenterl llielt lll w32 UbllllfED S'IMUIEISA .tireur llllil'iltlltll" l" ltllll ltllnllllllil lltllt llllllflilflll 'Application tiled April 1l.,

his invention relates to the production ol duplen ingots in which the Voutside section the in dill'ers troni the composition ol the body r he core ol the ingot.

ln the ina-lling ol ingots ol this class the inner surlace ol the niold in which the ingot is to be cast is lirst lined with plates ol the corrosion-resisting coatingl instal and the pouringn or" the core nietal into the mold is so ted so that as the core metal solidilies i .forros a superficial bond with the liningplates and `the plates become altiied to the casting.

ln the practice ol lorniingl castings ol the above descriptiorn certain precautions :must be obserred ol' holding' the lining plates in the mold duringI the casting operation and lor allowingI proper :lreedorn el movement of the plates during solidilication ol the molten metal, l-leretolfore, such plates have been retained in place in 'the mold by suction devices and a lnethod oit casting such ingots and retaining the plates in position by suction is set lorth in lllnited States patent to lCarbis,

llo. lltlll, dated March l, 1930.

rlhe particular.' object ont the present invention resides in an improved apparatus and noethod by which lining plates may be held and controlled in the mold during the casting mechanically instead of by employingI suction as heretoi'ore.

Further and other objects will be herein alter set forth in the accompanying specification and claims and shown in the drawings, which by way ol illustration show what is now to be considered a preferred embodiment ot the invention.

ln the drawings:

lFigure 1 is a side view oi" the mold, shown partly in section and also showing anelevational view oli the novel plate clamping insane. This view also shows a series of suc cessive positions ot the mold; A

Fig. Q is a top view of the mold showing the plate holding means disposed within it and securing the plates in position; l

Fig. 3 is a detail side sectional view showing the rnold and with the clamping means retaining one of the side )lates in position against the wall of the mold Fig. l is a detail side view ol one oil the espandere or plate holding devices;

ll` li is a detail sectional view talren on line -li ol ll'ig. d; and

l1 is a 'view ot a modification ol one oltthe espandere or plate holders in which an air cylinder device is used in lieu ol a single spring.

ln more detail in the drawings, the mold 1) which is here shown, is of the split type.J beingl suitably hinged at the left lower cor ner ig'. 2) and beingl mounted to pivot about the supporting mold shalt 11 as shown. 'lhe mold is held closed by suitable clamping,1 bolts such as 12.

lt will be understood that the mold is adapted to be hoisted up to variable positions by means el a suitable cable connected to a suitable eye which is located at the lower right hand corner ol the mold but which is not shown in Fig. 1. Such hoisting cable and its use during pouring of the metal into the mold is fully described in the Carbis patent mentioned above.

Molten metal is poured into the mold troni the left hand side and the mold is gradually lowered during the pouring operation as is described in the Corbis patent.

lt may be here stated that initially the mold is in the upper dotted line position designated A in Fig. 1, when pouring is commenced, then as pouring proceeds, it is gradn ually lowered to the intermediate dotted line lill lill

position (i. e. position B) and finally when the more is ompiaeiy fined with molan metal the mold will reach the full line position (i. e. position C) on Fig. 1.

The plate holding apparatus here shown comprises a plate holder frame 13 in the form 4of a yoke having the forked ends thereof grooved to provide for a half bearing upon the mold shaft 11. The plate holder frame is centralized upon the shaft by suitable collars 14 and the holder is kept in contact with the mold shaft by suitable springs 15. The plate holder frame has secured to it a plate 16 having three lianged feet 17. To these flanged feet 17 are secured yokes or bracket members 18 (see Figs. l and 5). Each yoke 18 supports a transverse stud or shaft 19 y pressed ytightly against the rnold walls by the action of the rollers under the influence of the spring. Mounted in the extreme upper right hand corner of plate 16 (see Fig. l) is a bolt or stud 28 which is adapted to fit the inclined slot of a suspension bar 29. The upper and opposite end of the suspension bar is connected to one end of a balancing or controlling bar 31 which is pivoted upon the fixed members or rails 30. Preferably the opposite end of member 3l is provided with a counterweighted portion 32 which projects under member 30 and is adapted to contact therewith when the suspension bar 29 is vin intermediate position, i. e. the B mold position.

The operation of the device is as follows.

The in ot mold is first closed and lowered to the or lowermost position. The liner plates P are then placed in position in the ingot mold. With the mold in lowermost position (C) the three expander or plate holding devices are disposed above the top of the mold as shown in Fig. l. The mold is then elevated towards the intermediate position B and as it is raised theexpander units are compressed manually or mechanically so that the rollers may enter the mold between the plates and are thereafter released to press laterall upon the plates. The mold is then elevate by the hoisting cable to the extreme upper position (A position). During this movement of the mold from position B to position A the expander units ride with the ingot mold and maintain the relative position thereto which these parts have in Fig. l with respect to mold position B. During such movement of the mold the balancing lever 29 moves from the full line position to the dotted line position (Fig. l).

`With the mold in the upper position everything is ready for the beginning of the pouring operation. As the metal is poured into the mold it is gradually lowered and finally reaches the B position. During this preliminary lowering movement of the mold the part 31 pivotally swings upon the

rail

30 and 32 abuts the lower side of the rail just as the mold reaches the B position. Further downward movement of the ingot mold from the B to C position causes the plate holder` with the associated expander devices to be gradually withdrawn from mold. When the mold has reached the bottom or lowermost position all of the expanding or plate holding devices willA have been wholly withdrawn from the mold and 'out of cooperation with the plates therein.

In Fig. 6 a slightly modified form of plate holder is provided. In lieu of utilizing a compression spring as heretofore, an air cylinder device 35 provided with piston and plunger and acting to press the

levers

20 and 21 apart against the action of a tension spring 36. With this arrangement the tension spring 36 would normally keep the rollers 22 drawing toward one another so that the plate holder could be introduced into the mold without manual compression of a spring. After the plate holder was int-roduced between the plates air pressure could be applied to the air cylinder 35 to thus press the plates apart and against the mold walls.

While the improved plate holder has been shown as applied to a tiltable mold it will be understood that the same mechanism could also be used with stationary molds in which case -the plate holding mechanism would be drawn out of the mold as metal was poured into the stationary molds, 0r the plate holder may remain stationary while the mold is lowered away from it.

1What I claim is:

l. A plate holder for holding plates in casting duplex ingots, comprising pressing means cooperating with the inner sides of a pair of plates. in a casting mold, and means t forwithdrawing the pressing means from cooperation with the plates as the metaly is poured into the mold.

2. A plate holder for holding plates in contact with wallsof a mold in casting duplex,

ingots, comprising a plurality of plate holding pressing devices disposed between'and cooperating with a pair of plates to press the latter toward walls of the mold for the purpose described.

3. A plate holder for pressing plates against walls of a tiltable mold in casting duplex ingots, said plate holder comprising a plate holder support which is both tiltable with the mold and which is relatively shiftable with respect thereto as the mold is tilted, and plate holding means carried by said support and adapted for cooperation with plates disposed adjacent the walls of the mold.

4. A plate holder for pressing plates against walls of a tiltable moldin casting duplex ingots, said plate holder comprising pressing devices adapted for disposition between the plates and for pressing the latter apart toward the'mold walls, and means for progressively withdrawing the plate holder plate pressing devices from pressing cooperation with the plates as the mold is tilted and progressively filled with molten metal.

5. A plate holder device for holding plates in contact with the walls of a tiltable mold in casting duplex ingots, comprising plate pressing devices for forcing the plates apart by pressure 'which is applied between the plates, means supporting the pressing devices to provide tor their maintaining an unchanged relation vvith the plates While the mold is in t certain tiltahle position, and meansit'or causing the pressing devices to traverse across the suritace of the plates during other tilting displacements of mold.

t3. A plate holder device for holding plates 'l0 against mold vvalls in casting duplex ingots, said devices comprising a pair of members each carrying a roller for contact with a plate, and means for pressing said members apart to thrust the rollers into contact with the plates l5 to hold the latter into contact with the mold vvalls.

ln a casting apparatus having a mold supported tor tiltable movement upon a mold sliatt and plate holding means Ytor pressing 20 plates against the mold Walls for casting duples ingots and comprising in combination a plate holder trame also supported upon said mold shaft, plate pressing devices carried by said 'trame with provisions for pressing plates 25 apart into contact With the mold Walls, said pressing devices by a relative tilting of their :trame with respect to the mold being adapted for disposition inside of a mold and between plates disposed adjacent the mold Walls, 30 means it'or causing the plate holder frame and the pressing devices to travel with the mold as the latter is tilted from one position to another position, and means for automatically bringing about a relative shifting movement B5 ot the 'trame and mold when the mold is tilted 'trom a certain position to another position so that the pressing devices travel over the plates and are eventually removed from cooperation therewith. 4U ln testimony whereof l hereto aliix my signature.

EDWARD M. CHANDLER.